add improved files from vfd driver proect
This commit is contained in:
parent
2eff94979e
commit
ebab5e223b
18
Makefile
18
Makefile
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@ -18,7 +18,7 @@
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# be silent per default, but 'make V=1' will show all compiler calls.
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ifneq ($(V),1)
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Q := @
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NULL := 2> /dev/null
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NULL := 1> /dev/null 2> /dev/null
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endif
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# the final binary name (without extension)
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@ -94,6 +94,9 @@ OOCD ?= openocd
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OOCD_INTERFACE ?= stlink-v2
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OOCD_TARGET ?= stm32f1x
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# which USB CDC ACM port is used bu the device, so we can reset it
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ACMPORT = /dev/ttyACM0
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# board specific USB DFU bootloader
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BOOTLOADERS = STM32duino-bootloader
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BOOTLOADER = $(BOOTLOADERS)/STM32F1/binaries/generic_boot20_pa1.bin
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@ -129,12 +132,12 @@ list: $(BINARY).list
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%.map: %.elf
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@# it's generated along with the elf
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%.elf: $(OBJ) $(LDSCRIPT) $(LIB_DIR)/lib$(LIBNAME).a
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%.elf: $(LDSCRIPT) $(LIB_DIR)/lib$(LIBNAME).a $(OBJ)
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$(info compiling $(@))
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$(Q)$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJ) $(LDLIBS) -o $(@)
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$(Q)size $(@)
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%.o: %.c
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@#printf " CC $(*).c\n"
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$(Q)$(CC) $(CFLAGS) $(ARCH_FLAGS) -o $(@) -c $(<)
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clean:
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@ -155,9 +158,14 @@ flash-swd: $(BINARY).hex
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$(info flashing $(<) using SWD)
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$(Q)$(OOCD) --file interface/$(OOCD_INTERFACE).cfg --file target/$(OOCD_TARGET).cfg --command "init" --command "reset init" --command "flash write_image erase $(<)" --command "reset" --command "shutdown" $(NULL)
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flash-dfu: $(BINARY).bin
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# reset device by setting the data width to 5 bis on the USB CDC ACM port
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reset:
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$(Q)stty --file /dev/ttyACM0 115200 raw cs5
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$(Q)sleep 0.5
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flash-dfu: $(BINARY).bin reset
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$(info flashing $(<) using DFU)
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$(Q)dfu-util --device 1eaf:0003 --cfg 1 --intf 0 --alt 2 --reset --download $(<)
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$(Q)dfu-util --device 1eaf:0003 --cfg 1 --intf 0 --alt 2 --reset --download $(<) $(NULL)
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.PHONY: clean elf bin hex srec list bootloader flash flash-swd flash-dfu
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.SECONDARY:
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@ -14,6 +14,12 @@
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*/
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/* Copyright (c) 2016 King Kévin <kingkevin@cuvoodoo.info> */
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/* get the length of an array */
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#define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
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/* system clock frequency in Hz */
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#define SYSTEM_CLOCK_FREQ 72000000
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/* LED is on pin 11/PA1 */
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#define LED_RCC RCC_GPIOA
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#define LED_PORT GPIOA
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@ -21,3 +27,4 @@
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/* default output (i.e. for printf) */
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int _write(int file, char *ptr, int len);
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113
lib/usb_cdcacm.c
113
lib/usb_cdcacm.c
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@ -24,20 +24,23 @@
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#include <libopencm3/stm32/rcc.h> // real-time control clock library
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#include <libopencm3/stm32/gpio.h> // general purpose input output library
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#include <libopencm3/cm3/nvic.h> // interrupt handler
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#include <libopencm3/cm3/scb.h> // reset utilities
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#include <libopencmsis/core_cm3.h> // Cortex M3 utilities
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#include <libopencm3/usb/usbd.h> // USB library
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#include <libopencm3/usb/cdc.h> // USB CDC library
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#include "usb_cdcacm.h" // USB CDC ACM header and definitions
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/* USB descriptor */
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/* USB devices descriptor
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* as defined in USB CDC specification section 5
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*/
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static const struct usb_device_descriptor device_descriptor = {
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.bLength = USB_DT_DEVICE_SIZE, // the size of this header in bytes, 18
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.bDescriptorType = USB_DT_DEVICE, // a value of 1 indicates that this is a device descriptor
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.bcdUSB = 0x0200, // this device supports USB 2.0
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.bDeviceClass = USB_CLASS_CDC, // use the CDC device class
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.bDeviceSubClass = USB_CDC_SUBCLASS_ACM, // use the ACM sub-class
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.bDeviceProtocol = USB_CDC_PROTOCOL_NONE, // use no specific protocol
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.bDeviceSubClass = 0, // unused
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.bDeviceProtocol = 0, // unused
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.bMaxPacketSize0 = 64, // packet size for endpoint zero in bytes
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.idVendor = 0xc440, // Vendor ID (CuVo...)
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.idProduct = 0x0d00, // product ID within the Vendor ID space (...odoo)
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@ -77,6 +80,9 @@ static const struct usb_endpoint_descriptor communication_endpoints[] = {{
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.bInterval = 255, // the frequency, in number of frames, that we're going to be sending data
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}};
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/* functional descriptor
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* as defined in USB CDC specification section 5.2.3
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*/
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static const struct {
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struct usb_cdc_header_descriptor header;
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struct usb_cdc_call_management_descriptor call_mgmt;
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@ -90,8 +96,7 @@ static const struct {
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.bcdCDC = 0x0110,
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},
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.call_mgmt = {
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.bFunctionLength =
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sizeof(struct usb_cdc_call_management_descriptor),
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.bFunctionLength = sizeof(struct usb_cdc_call_management_descriptor),
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.bDescriptorType = CS_INTERFACE,
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.bDescriptorSubtype = USB_CDC_TYPE_CALL_MANAGEMENT,
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.bmCapabilities = 0,
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@ -112,6 +117,9 @@ static const struct {
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},
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};
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/* communication class interface descriptor
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* as defined in USB CDC specification section 5.1.3
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*/
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static const struct usb_interface_descriptor communication_interface[] = {{
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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@ -129,6 +137,9 @@ static const struct usb_interface_descriptor communication_interface[] = {{
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.extralen = sizeof(cdcacm_functional_descriptors),
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}};
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/* data class interface descriptor
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* as defined in USB CDC specification section 5.1.3
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*/
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static const struct usb_interface_descriptor data_interface[] = {{
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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@ -158,7 +169,7 @@ static const struct usb_config_descriptor config = {
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.bNumInterfaces = 2, // the number of interfaces in this configuration
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.bConfigurationValue = 1, // the index of this configuration
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.iConfiguration = 0, // a string index describing this configuration (zero means not provided)
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.bmAttributes = 0x80, // self powered (0<<6), supports remote wakeup (5<<0)
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.bmAttributes = 0x80, // self powered (0<<6), supports remote wakeup (0<<5)
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.bMaxPower = 0x32, // the maximum amount of current that this device will draw in 2mA units
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// end of header
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.interface = interfaces, // pointer to an array of interfaces
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@ -181,6 +192,9 @@ static usbd_device *usb_device;
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static uint8_t rx_buffer[CDCACM_BUFFER] = {0};
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static volatile uint8_t rx_i = 0;
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static volatile uint8_t rx_used = 0;
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static uint8_t tx_buffer[CDCACM_BUFFER] = {0};
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static volatile uint8_t tx_i = 0;
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static volatile uint8_t tx_used = 0;
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/* show the user how much data received over USB is ready */
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volatile uint8_t cdcacm_received = 0; // same as rx_used, but since the user can write this variable we don't rely on it
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@ -191,30 +205,35 @@ static int cdcacm_control_request(usbd_device *usbd_dev, struct usb_setup_data *
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(void)usbd_dev;
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switch (req->bRequest) {
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case USB_CDC_REQ_SET_CONTROL_LINE_STATE: {
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/*
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* This Linux cdc_acm driver requires this to be implemented
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* even though it's optional in the CDC spec, and we don't
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* advertise it in the ACM functional descriptor.
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*/
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char local_buf[10];
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struct usb_cdc_notification *notif = (void *)local_buf;
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/* We echo signals back to host as notification. */
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notif->bmRequestType = 0xA1;
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notif->bNotification = USB_CDC_NOTIFY_SERIAL_STATE;
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notif->wValue = 0;
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notif->wIndex = 0;
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notif->wLength = 2;
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local_buf[8] = req->wValue & 3;
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local_buf[9] = 0;
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// usbd_ep_write_packet(0x83, buf, 10);
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return 1;
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case USB_CDC_REQ_SET_CONTROL_LINE_STATE: {
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/*
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bool dtr = (req->wValue & (1 << 0)) ? true : false;
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bool rts = (req->wValue & (1 << 1)) ? true : false;
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*/
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/* this Linux cdc_acm driver requires this to be implemented
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* even though it's optional in the CDC spec, and we don't
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* advertise it in the ACM functional descriptor.
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*/
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return 1;
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}
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case USB_CDC_REQ_SET_LINE_CODING:
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if (*len < sizeof(struct usb_cdc_line_coding))
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case USB_CDC_REQ_SET_LINE_CODING:
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// ignore if length is wrong
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if (*len < sizeof(struct usb_cdc_line_coding)) {
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return 0;
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}
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// get the line coding
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struct usb_cdc_line_coding *coding = (struct usb_cdc_line_coding *)*buf;
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/* reset device is the data bits is set to 5
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* this is used to allowing rebooting the device in DFU mode for reflashing
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* to reset the device from the host you can use stty --file /dev/ttyACM0 115200 raw cs5
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*/
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if (coding->bDataBits==5) {
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scb_reset_system(); // reset device
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while (true); // wait for the reset to happen
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}
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return 1;
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default:
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return 0;
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return 1;
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}
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return 0;
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}
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@ -238,13 +257,35 @@ static void cdcacm_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)
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}
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}
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static void cdcacm_data_tx_cb(usbd_device *usbd_dev, uint8_t ep)
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{
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(void)ep;
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(void)usbd_dev;
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char usb_data[64] = {0}; // buffer to send data
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uint16_t usb_length = 0; // length of transmitted data
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/* transmit data */
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if (tx_used) { // copy received data
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for (usb_length=0; usb_length<sizeof(usb_data) && usb_length<tx_used; usb_length++) { // only until buffer is full
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usb_data[usb_length] = tx_buffer[(tx_i+usb_length)%sizeof(tx_buffer)]; // put data in transmit data
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}
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// this could lead to a lock down
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// while(usbd_ep_write_packet(usb_device, 0x82, usb_data, usb_length)==0);
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// this is less critical
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uint8_t transmitted = usbd_ep_write_packet(usb_device, 0x82, usb_data, usb_length); // try to transmit data
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tx_i = (tx_i+transmitted)%sizeof(rx_buffer); // update location on buffer
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tx_used -= transmitted; // update used size
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}
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}
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static void cdcacm_set_config(usbd_device *usbd_dev, uint16_t wValue)
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{
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(void)wValue;
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(void)usbd_dev;
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usbd_ep_setup(usbd_dev, 0x01, USB_ENDPOINT_ATTR_BULK, 64, cdcacm_data_rx_cb);
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usbd_ep_setup(usbd_dev, 0x82, USB_ENDPOINT_ATTR_BULK, 64, NULL);
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usbd_ep_setup(usbd_dev, 0x82, USB_ENDPOINT_ATTR_BULK, 64, cdcacm_data_tx_cb);
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usbd_ep_setup(usbd_dev, 0x83, USB_ENDPOINT_ATTR_INTERRUPT, 16, NULL);
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usbd_register_control_callback( usbd_dev, USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE, USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT, cdcacm_control_request);
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@ -272,13 +313,16 @@ void cdcacm_setup(void)
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rx_i = 0;
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rx_used = 0;
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cdcacm_received = 0;
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/* start sending */
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usbd_ep_write_packet(usb_device, 0x82, NULL, 0);
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}
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/* get character from USB CDC ACM (blocking) */
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char cdcacm_getchar(void)
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{
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while (!rx_used) { // idle until data is available
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__WFI(); // sleep until interrupt;
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__WFI(); // sleep until interrupt (not sure if it's a good idea here
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}
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char to_return = rx_buffer[rx_i]; // get the next available character
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rx_i = (rx_i+1)%sizeof(rx_buffer); // update used buffer
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@ -290,7 +334,14 @@ char cdcacm_getchar(void)
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/* put character on USB CDC ACM (blocking) */
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void cdcacm_putchar(char c)
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{
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while(usbd_ep_write_packet(usb_device, 0x82, &c, 1)==0); // sending single characters at a time isn't very optimal, but I didn't find a way to do it USB request based
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if (tx_used<sizeof(tx_buffer)) { // buffer not full
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tx_buffer[(tx_i+tx_used)%sizeof(tx_buffer)] = c; // put character in buffer
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tx_used++; // update used buffer
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} else { // buffer full
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tx_i = (tx_i+1)%sizeof(tx_buffer); // shift start
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tx_buffer[(tx_i+tx_used)%sizeof(tx_buffer)] = c; // overwrite old data
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}
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usbd_ep_write_packet(usb_device, 0x82, NULL, 0); // trigger tx (not sure why cdcacm_data_tx_cb doesn't work else)
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}
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void usb_wakeup_isr(void) {
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@ -0,0 +1,523 @@
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/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/* Copyright (c) 2016 King Kévin <kingkevin@cuvoodoo.info> */
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/* this library is used to drive the vacuum fluorescent display extracted from a Samsung SER-6500 cash register
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* it uses three chained supertex HV518 shift register VFD drivers */
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/* standard libraries */
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#include <stdint.h> // standard integer types
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#include <stdlib.h> // general utilities
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/* STM32 (including CM3) libraries */
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#include <libopencm3/stm32/rcc.h> // real-time control clock library
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#include <libopencm3/stm32/gpio.h> // general purpose input output library
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#include <libopencm3/stm32/spi.h> // SPI library
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#include <libopencm3/stm32/timer.h> // timer library
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#include <libopencm3/cm3/nvic.h> // interrupt handler
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#include "global.h" // global definitions
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#include "vfd_hv518.h" // VFD library API
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/* supertex HV518 VFD driver pins */
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/* port on which the pins to control the supertex HV518 VFD driver are
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* we use port A because of the SPI interface */
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#define VFD_PORT GPIOA
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#define VFD_PORT_RCC RCC_GPIOA
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/* SPI port to use */
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#define VFD_SPI SPI1
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#if (VFD_SPI==SPI1)
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#define VFD_SPI_RCC RCC_SPI1
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#define VFD_SPI_IRQ NVIC_SPI1_IRQ
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#elif (VFD_SPI==SPI2)
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#define VFD_SPI_RCC RCC_SPI2
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#define VFD_SPI_IRQ NVIC_SPI2_IRQ
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#endif
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/* strobe pin to enable high voltage output
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* high voltage is output on low
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* drive using a GPIO PA6 (normally MISO) */
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#define VFD_STR GPIO6
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/* latch enable pin
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* store the shifted data on low
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* output the parallel data on high
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* use GPIO (PA4) (NSS does not work as SS) */
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#define VFD_NLE GPIO4
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/* clock signal
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* drive using SPI SCK (PA5) */
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#define VFD_CLK GPIO_SPI1_SCK
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/* data input, where the data is shifted to
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* drive using SPI MOSI (PA7) */
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#define VFD_DIN GPIO_SPI1_MOSI
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/* timer for automatic refresh */
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#define VFD_TIMER TIM2
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#if (VFD_TIMER==TIM2)
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#define VFD_TIMER_RCC RCC_TIM2
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#define VFD_TIMER_IRQ NVIC_TIM2_IRQ
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#elif (VFD_TIMER==TIM3)
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#define VFD_TIMER_RCC RCC_TIM3
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#define VFD_TIMER_IRQ NVIC_TIM3_IRQ
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#elif (VFD_TIMER==TIM4)
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#define VFD_TIMER_RCC RCC_TIM4
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#define VFD_TIMER_IRQ NVIC_TIM4_IRQ
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#elif (VFD_TIMER==TIM5)
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#define VFD_TIMER_RCC RCC_TIM5
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#define VFD_TIMER_IRQ NVIC_TIM5_IRQ
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#endif
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/* ASCII characters encoded for 7 segments display
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* starts with space
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*/
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static const uint8_t ascii_7segments[] = {
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0b00000000, // space
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0b00110000, // ! (I)
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0b00100010, // "
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0b01011100, // # (o)
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0b01101101, // $ (s)
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0b01010010, // % (/)
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0b01111101, // & (6)
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0b00100000, // '
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0b00111001, // ( ([)
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0b00001111, // )
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0b01110000, // *
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0b01000110, // +
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0b00010000, // ,
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0b01000000, // -
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0b00010000, // . (,)
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0b01010010, // /
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0b00111111, // 0
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0b00000110, // 1
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0b01011011, // 2
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0b01001111, // 3
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0b01100110, // 4
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0b01101101, // 5
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0b01111101, // 6
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0b00000111, // 7
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0b01111111, // 8
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0b01101111, // 9
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0b01001000, // : (=)
|
||||
0b01001000, // ; (=)
|
||||
0b01011000, // <
|
||||
0b01001000, // =
|
||||
0b01001100, // >
|
||||
0b01010011, // ?
|
||||
0b01111011, // @
|
||||
0b01110111, // A
|
||||
0b01111111, // B
|
||||
0b00111001, // C
|
||||
0b01011110, // D
|
||||
0b01111001, // E
|
||||
0b01110001, // F
|
||||
0b00111101, // G
|
||||
0b01110110, // H
|
||||
0b00110000, // I
|
||||
0b00011110, // J
|
||||
0b01110110, // K
|
||||
0b00111000, // L
|
||||
0b00110111, // M
|
||||
0b00110111, // N
|
||||
0b00111111, // O
|
||||
0b01110011, // P
|
||||
0b01101011, // Q
|
||||
0b00110011, // R
|
||||
0b01101101, // S
|
||||
0b01111000, // T
|
||||
0b00111110, // U
|
||||
0b00111110, // V (U)
|
||||
0b00111110, // W (U)
|
||||
0b01110110, // X (H)
|
||||
0b01101110, // Y
|
||||
0b01011011, // Z
|
||||
0b00111001, // [
|
||||
0b01100100, // '\'
|
||||
0b00001111, // /
|
||||
0b00100011, // ^
|
||||
0b00001000, // _
|
||||
0b00000010, // `
|
||||
0b01011111, // a
|
||||
0b01111100, // b
|
||||
0b01011000, // c
|
||||
0b01011110, // d
|
||||
0b01111011, // e
|
||||
0b01110001, // f
|
||||
0b01101111, // g
|
||||
0b01110100, // h
|
||||
0b00010000, // i
|
||||
0b00001100, // j
|
||||
0b01110110, // k
|
||||
0b00110000, // l
|
||||
0b01010100, // m
|
||||
0b01010100, // n
|
||||
0b01011100, // o
|
||||
0b01110011, // p
|
||||
0b01100111, // q
|
||||
0b01010000, // r
|
||||
0b01101101, // s
|
||||
0b01111000, // t
|
||||
0b00011100, // u
|
||||
0b00011100, // v (u)
|
||||
0b00011100, // w (u)
|
||||
0b01110110, // x
|
||||
0b01101110, // y
|
||||
0b01011011, // z
|
||||
0b00111001, // { ([)
|
||||
0b00110000, // |
|
||||
0b00001111, // } ([)
|
||||
0b01000000, // ~
|
||||
};
|
||||
|
||||
/* font for the 5x7 dot matrix display
|
||||
* from http://sunge.awardspace.com/glcd-sd/node4.html
|
||||
* first value is left-most line
|
||||
* LSB is top dot, MSB is not used
|
||||
*/
|
||||
static const uint8_t font5x7[][5] = {
|
||||
{0x00, 0x00, 0x00, 0x00, 0x00}, // (space)
|
||||
{0x00, 0x00, 0x5F, 0x00, 0x00}, // !
|
||||
{0x00, 0x07, 0x00, 0x07, 0x00}, // "
|
||||
{0x14, 0x7F, 0x14, 0x7F, 0x14}, // #
|
||||
{0x24, 0x2A, 0x7F, 0x2A, 0x12}, // $
|
||||
{0x23, 0x13, 0x08, 0x64, 0x62}, // %
|
||||
{0x36, 0x49, 0x55, 0x22, 0x50}, // &
|
||||
{0x00, 0x05, 0x03, 0x00, 0x00}, // '
|
||||
{0x00, 0x1C, 0x22, 0x41, 0x00}, // (
|
||||
{0x00, 0x41, 0x22, 0x1C, 0x00}, // )
|
||||
{0x08, 0x2A, 0x1C, 0x2A, 0x08}, // *
|
||||
{0x08, 0x08, 0x3E, 0x08, 0x08}, // +
|
||||
{0x00, 0x50, 0x30, 0x00, 0x00}, // ,
|
||||
{0x08, 0x08, 0x08, 0x08, 0x08}, // -
|
||||
{0x00, 0x60, 0x60, 0x00, 0x00}, // .
|
||||
{0x20, 0x10, 0x08, 0x04, 0x02}, // /
|
||||
{0x3E, 0x51, 0x49, 0x45, 0x3E}, // 0
|
||||
{0x00, 0x42, 0x7F, 0x40, 0x00}, // 1
|
||||
{0x42, 0x61, 0x51, 0x49, 0x46}, // 2
|
||||
{0x21, 0x41, 0x45, 0x4B, 0x31}, // 3
|
||||
{0x18, 0x14, 0x12, 0x7F, 0x10}, // 4
|
||||
{0x27, 0x45, 0x45, 0x45, 0x39}, // 5
|
||||
{0x3C, 0x4A, 0x49, 0x49, 0x30}, // 6
|
||||
{0x01, 0x71, 0x09, 0x05, 0x03}, // 7
|
||||
{0x36, 0x49, 0x49, 0x49, 0x36}, // 8
|
||||
{0x06, 0x49, 0x49, 0x29, 0x1E}, // 9
|
||||
{0x00, 0x36, 0x36, 0x00, 0x00}, // :
|
||||
{0x00, 0x56, 0x36, 0x00, 0x00}, // ;
|
||||
{0x00, 0x08, 0x14, 0x22, 0x41}, // <
|
||||
{0x14, 0x14, 0x14, 0x14, 0x14}, // =
|
||||
{0x41, 0x22, 0x14, 0x08, 0x00}, // >
|
||||
{0x02, 0x01, 0x51, 0x09, 0x06}, // ?
|
||||
{0x32, 0x49, 0x79, 0x41, 0x3E}, // @
|
||||
{0x7E, 0x11, 0x11, 0x11, 0x7E}, // A
|
||||
{0x7F, 0x49, 0x49, 0x49, 0x36}, // B
|
||||
{0x3E, 0x41, 0x41, 0x41, 0x22}, // C
|
||||
{0x7F, 0x41, 0x41, 0x22, 0x1C}, // D
|
||||
{0x7F, 0x49, 0x49, 0x49, 0x41}, // E
|
||||
{0x7F, 0x09, 0x09, 0x01, 0x01}, // F
|
||||
{0x3E, 0x41, 0x41, 0x51, 0x32}, // G
|
||||
{0x7F, 0x08, 0x08, 0x08, 0x7F}, // H
|
||||
{0x00, 0x41, 0x7F, 0x41, 0x00}, // I
|
||||
{0x20, 0x40, 0x41, 0x3F, 0x01}, // J
|
||||
{0x7F, 0x08, 0x14, 0x22, 0x41}, // K
|
||||
{0x7F, 0x40, 0x40, 0x40, 0x40}, // L
|
||||
{0x7F, 0x02, 0x04, 0x02, 0x7F}, // M
|
||||
{0x7F, 0x04, 0x08, 0x10, 0x7F}, // N
|
||||
{0x3E, 0x41, 0x41, 0x41, 0x3E}, // O
|
||||
{0x7F, 0x09, 0x09, 0x09, 0x06}, // P
|
||||
{0x3E, 0x41, 0x51, 0x21, 0x5E}, // Q
|
||||
{0x7F, 0x09, 0x19, 0x29, 0x46}, // R
|
||||
{0x46, 0x49, 0x49, 0x49, 0x31}, // S
|
||||
{0x01, 0x01, 0x7F, 0x01, 0x01}, // T
|
||||
{0x3F, 0x40, 0x40, 0x40, 0x3F}, // U
|
||||
{0x1F, 0x20, 0x40, 0x20, 0x1F}, // V
|
||||
{0x7F, 0x20, 0x18, 0x20, 0x7F}, // W
|
||||
{0x63, 0x14, 0x08, 0x14, 0x63}, // X
|
||||
{0x03, 0x04, 0x78, 0x04, 0x03}, // Y
|
||||
{0x61, 0x51, 0x49, 0x45, 0x43}, // Z
|
||||
{0x00, 0x00, 0x7F, 0x41, 0x41}, // [
|
||||
{0x02, 0x04, 0x08, 0x10, 0x20}, // '\'
|
||||
{0x41, 0x41, 0x7F, 0x00, 0x00}, // ]
|
||||
{0x04, 0x02, 0x01, 0x02, 0x04}, // ^
|
||||
{0x40, 0x40, 0x40, 0x40, 0x40}, // _
|
||||
{0x00, 0x01, 0x02, 0x04, 0x00}, // `
|
||||
{0x20, 0x54, 0x54, 0x54, 0x78}, // a
|
||||
{0x7F, 0x48, 0x44, 0x44, 0x38}, // b
|
||||
{0x38, 0x44, 0x44, 0x44, 0x20}, // c
|
||||
{0x38, 0x44, 0x44, 0x48, 0x7F}, // d
|
||||
{0x38, 0x54, 0x54, 0x54, 0x18}, // e
|
||||
{0x08, 0x7E, 0x09, 0x01, 0x02}, // f
|
||||
{0x08, 0x14, 0x54, 0x54, 0x3C}, // g
|
||||
{0x7F, 0x08, 0x04, 0x04, 0x78}, // h
|
||||
{0x00, 0x44, 0x7D, 0x40, 0x00}, // i
|
||||
{0x20, 0x40, 0x44, 0x3D, 0x00}, // j
|
||||
{0x00, 0x7F, 0x10, 0x28, 0x44}, // k
|
||||
{0x00, 0x41, 0x7F, 0x40, 0x00}, // l
|
||||
{0x7C, 0x04, 0x18, 0x04, 0x78}, // m
|
||||
{0x7C, 0x08, 0x04, 0x04, 0x78}, // n
|
||||
{0x38, 0x44, 0x44, 0x44, 0x38}, // o
|
||||
{0x7C, 0x14, 0x14, 0x14, 0x08}, // p
|
||||
{0x08, 0x14, 0x14, 0x18, 0x7C}, // q
|
||||
{0x7C, 0x08, 0x04, 0x04, 0x08}, // r
|
||||
{0x48, 0x54, 0x54, 0x54, 0x20}, // s
|
||||
{0x04, 0x3F, 0x44, 0x40, 0x20}, // t
|
||||
{0x3C, 0x40, 0x40, 0x20, 0x7C}, // u
|
||||
{0x1C, 0x20, 0x40, 0x20, 0x1C}, // v
|
||||
{0x3C, 0x40, 0x30, 0x40, 0x3C}, // w
|
||||
{0x44, 0x28, 0x10, 0x28, 0x44}, // x
|
||||
{0x0C, 0x50, 0x50, 0x50, 0x3C}, // y
|
||||
{0x44, 0x64, 0x54, 0x4C, 0x44}, // z
|
||||
{0x00, 0x08, 0x36, 0x41, 0x00}, // {
|
||||
{0x00, 0x00, 0x7F, 0x00, 0x00}, // |
|
||||
{0x00, 0x41, 0x36, 0x08, 0x00}, // }
|
||||
{0b00001000, 0b00000100, 0b00001100, 0b00001000, 0b00000100} // ~
|
||||
};
|
||||
|
||||
/* pictures for the 5x7 dot matrix display
|
||||
* first value is left-most line
|
||||
* LSB is top dot, MSB is not used
|
||||
*/
|
||||
static const uint8_t pict5x7[][5] = {
|
||||
{0x08, 0x08, 0x2A, 0x1C, 0x08}, // ->
|
||||
{0x08, 0x1C, 0x2A, 0x08, 0x08}, // <-
|
||||
{0b01110000, 0b01110000, 0b01111010, 0b01111100, 0b01011000}, // bunny side 1
|
||||
{0b00100000, 0b01110000, 0b01110010, 0b01111100, 0b01011000}, // bunny side 2
|
||||
{0b00111110, 0b01001001, 0b01010110, 0b01001001, 0b00111110}, // bunny face 1
|
||||
{0b00111110, 0b01010001, 0b01100110, 0b01010001, 0b00111110}, // bunny face 2
|
||||
{0b00111000, 0b01010111, 0b01100100, 0b01010111, 0b00111000}, // bunny face 3
|
||||
{0b00111000, 0b01001111, 0b01010100, 0b01001111, 0b00111000}, // bunny face 4
|
||||
{0b00111000, 0b01011110, 0b01101000, 0b01011110, 0b00111000}, // bunny face 5
|
||||
{0b01000001, 0b00110110, 0b00001000, 0b00110110, 0b01000001}, // cross 1
|
||||
{~0b01000001, ~0b00110110, ~0b00001000, ~0b00110110, ~0b01000001}, // cross 1 negated
|
||||
{0b00100010, 0b00010100, 0b00001000, 0b00010100, 0b00100010}, // cross 2
|
||||
{~0b00100010, ~0b00010100, ~0b00001000, ~0b00010100, ~0b00100010}, // cross 2 negated
|
||||
{0x00, 0x00, 0x00, 0x00, 0x00} // nothing
|
||||
};
|
||||
|
||||
/* the 32 bits values to be shifted out to the VFD driver
|
||||
* split into 16 bit for SPI transfer
|
||||
* since the bits for digits and matrix are independent, they can be combined
|
||||
* we have more matrix (12) than digits (10)
|
||||
*/
|
||||
static uint16_t driver_data[VFD_MATRIX][VFD_DRIVERS*2] = {0};
|
||||
static volatile uint8_t spi_i = 0; // which driver data is being transmitted
|
||||
static volatile uint8_t vfd_grid = 0; // which grid/part to activate (single digits and matrix can be combined)
|
||||
static const uint32_t digit_mask = 0x00fffff0; // the bits used for selecting then digit and 7 segment anodes (for the second driver)
|
||||
|
||||
/* set digit <nb> to ASCII character <c>
|
||||
* use the MSB of <c> to enable the dot */
|
||||
void vfd_digit(uint8_t nb, char c)
|
||||
{
|
||||
if (!(nb<VFD_DIGITS)) { // check the digit exists
|
||||
return;
|
||||
}
|
||||
|
||||
uint32_t digit_data = 0; // the data to be shifted out for the driver (for the second driver)
|
||||
|
||||
digit_data = 1<<(4+(9-nb)); // select digit
|
||||
/* encode segment
|
||||
* here the bit order (classic 7 segment + underline and dot)
|
||||
* 3_
|
||||
* 8|9_|4
|
||||
* 7|6_|5.1
|
||||
* 0_2,
|
||||
* */
|
||||
if (false) { // add the underline (not encoded)
|
||||
digit_data |= (1<<(14));
|
||||
}
|
||||
if (c&0x80) { // add the dot (encoded in the 8th bit)
|
||||
digit_data |= (1<<(15));
|
||||
}
|
||||
if (false) { // add the comma (not encoded)
|
||||
digit_data |= (1<<(16));
|
||||
}
|
||||
|
||||
c &= 0x7f; // only take the ASCII part
|
||||
if (c>=' ') { // only take printable characters
|
||||
uint8_t i = c-' '; // get index for character
|
||||
if (i<LENGTH(ascii_7segments)) {
|
||||
digit_data |= (ascii_7segments[i]<<(17)); // add encoded segments to memory
|
||||
}
|
||||
}
|
||||
|
||||
digit_data &= digit_mask; // be sure only the bits for the digit are used
|
||||
digit_data |= (driver_data[nb][2]+(driver_data[nb][3]<<16))&~digit_mask; // get the existing data and add the bits for the digit
|
||||
driver_data[nb][2] = digit_data; // write back data (least significant half)
|
||||
driver_data[nb][3] = (digit_data>>16); // write back data (most significant half)
|
||||
}
|
||||
|
||||
/* set dot matrix <nb> to ASCII character <c>
|
||||
* non ASCII characters are used for pictures */
|
||||
void vfd_matrix(uint8_t nb, char c)
|
||||
{
|
||||
// check the matrix exists
|
||||
if (!(nb<VFD_MATRIX)) {
|
||||
return;
|
||||
}
|
||||
|
||||
uint32_t matrix_data[VFD_DRIVERS] = {0}; // the data to be shifted out for the driver
|
||||
|
||||
// select matrix
|
||||
if (nb<4) {
|
||||
matrix_data[1] = 1<<(3-nb);
|
||||
} else {
|
||||
matrix_data[0] = 1<<(35-nb);
|
||||
}
|
||||
|
||||
if ((c<0x80) && (c>=' ')) { // only take printable characters
|
||||
uint8_t i = c-' '; // get index for character
|
||||
if (i<LENGTH(font5x7)) {
|
||||
matrix_data[1] |= font5x7[i][0]<<24;
|
||||
matrix_data[2] |= font5x7[i][1]<<0;
|
||||
matrix_data[2] |= font5x7[i][2]<<8;
|
||||
matrix_data[2] |= font5x7[i][3]<<16;
|
||||
matrix_data[2] |= font5x7[i][4]<<24;
|
||||
}
|
||||
} else if (c>0x7f) { // the non ASCII character are used for pictures
|
||||
uint8_t i = c-0x80; // get index for character
|
||||
if (i<LENGTH(pict5x7)) {
|
||||
matrix_data[1] |= pict5x7[i][0]<<24;
|
||||
matrix_data[2] |= pict5x7[i][1]<<0;
|
||||
matrix_data[2] |= pict5x7[i][2]<<8;
|
||||
matrix_data[2] |= pict5x7[i][3]<<16;
|
||||
matrix_data[2] |= pict5x7[i][4]<<24;
|
||||
}
|
||||
}
|
||||
|
||||
matrix_data[1] &= ~digit_mask; // be sure only the bits for the matrix are used
|
||||
matrix_data[1] |= (driver_data[nb][2]+(driver_data[nb][3]<<16))&digit_mask; // get the existing data for the digit
|
||||
// prepare the data for SPI to shift it out
|
||||
for (uint8_t i=0; i<LENGTH(matrix_data); i++) {
|
||||
driver_data[nb][i*2] = matrix_data[i];
|
||||
driver_data[nb][i*2+1] = matrix_data[i]>>16;
|
||||
}
|
||||
}
|
||||
|
||||
/* clear VFD display */
|
||||
void vfd_clear(void)
|
||||
{
|
||||
for (uint8_t i=0; i<LENGTH(driver_data); i++) {
|
||||
for (uint8_t j=0; j<LENGTH(driver_data[0]); j++) {
|
||||
driver_data[i][j] = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* test VFD display (light up all anodes) */
|
||||
void vfd_test(void)
|
||||
{
|
||||
for (uint8_t i=0; i<LENGTH(driver_data); i++) {
|
||||
for (uint8_t j=0; j<LENGTH(driver_data[0]); j++) {
|
||||
driver_data[i][j] = ~0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* switch VFD display on */
|
||||
void vfd_on(void)
|
||||
{
|
||||
gpio_clear(VFD_PORT, VFD_STR); // enable HV output
|
||||
timer_enable_counter(VFD_TIMER); // start timer to periodically output that to the parts
|
||||
}
|
||||
|
||||
/* switch VFD display off */
|
||||
void vfd_off(void)
|
||||
{
|
||||
gpio_set(VFD_PORT, VFD_STR); // disable HV output
|
||||
timer_disable_counter(VFD_TIMER); // stop timer to periodically output that to the parts
|
||||
}
|
||||
|
||||
/* setup VFD */
|
||||
void vfd_setup(void)
|
||||
{
|
||||
/* setup GPIO to control the VFD */
|
||||
rcc_periph_clock_enable(VFD_PORT_RCC); // enable clock for VFD GPIO
|
||||
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, VFD_STR); // set VFD pin to output push-pull
|
||||
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, VFD_NLE); // set VFD pin to output push-pull
|
||||
|
||||
gpio_set(VFD_PORT, VFD_STR); // disable HV output
|
||||
gpio_clear(VFD_PORT, VFD_NLE); // do not output latched data
|
||||
|
||||
/* setup SPI to transmit data */
|
||||
rcc_periph_clock_enable(VFD_SPI_RCC); // enable SPI clock
|
||||
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, VFD_CLK); // set VFD pin to alternative function push-pull
|
||||
gpio_set_mode(VFD_PORT, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, VFD_DIN); // set VFD pin to alternative function push-pull
|
||||
|
||||
spi_reset(VFD_SPI); // clear SPI values
|
||||
/* set SPI:
|
||||
* - use VFD_SPI port
|
||||
* - divide clock by 8 for generating the baudrate (F_PCLK1 is 36MHz, max HV518 is 6MHz)
|
||||
* - clock idle high polarity
|
||||
* - data is valid on rising edge (second clock phase)
|
||||
* - send 16 bits at a time
|
||||
* - send least significant bit first (that's how I coded the data)
|
||||
*/
|
||||
spi_init_master(VFD_SPI, SPI_CR1_BAUDRATE_FPCLK_DIV_8, SPI_CR1_CPOL_CLK_TO_1_WHEN_IDLE, SPI_CR1_CPHA_CLK_TRANSITION_2, SPI_CR1_DFF_16BIT, SPI_CR1_LSBFIRST);
|
||||
//spi_set_bidirectional_transmit_only_mode(VFD_SPI); // only use MOSI to transmit
|
||||
spi_set_unidirectional_mode(VFD_SPI); // MISO is unused
|
||||
/* set NSS high to enable transmission
|
||||
* the NSS in STM32 can not be used as hardware slave select
|
||||
* RM0008 reference manual 25.3.1 is misleading
|
||||
* when hardware NSS is used and output is enabled NSS never goes up after transmission, even if SPI is disabled
|
||||
* when software NSS is used, NSS can not be set high again, even when writing to the register
|
||||
* the slave select must be done manually using GPIO */
|
||||
spi_enable_software_slave_management(VFD_SPI);
|
||||
spi_set_nss_high(VFD_SPI); // set NSS high
|
||||
|
||||
nvic_enable_irq(VFD_SPI_IRQ); // enable SPI interrupt
|
||||
spi_enable(VFD_SPI); // enable SPI (the tx empty interrupt will trigger)
|
||||
|
||||
/* setup timer to refresh display */
|
||||
rcc_periph_clock_enable(VFD_TIMER_RCC); // enable clock for timer block
|
||||
timer_reset(VFD_TIMER); // reset timer state
|
||||
timer_set_mode(VFD_TIMER, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock,edge alignment (simple count), and count up
|
||||
timer_set_prescaler(VFD_TIMER, (SYSTEM_CLOCK_FREQ/(1<<16))-1); // set the prescaler so this 16 bits timer overflows at 1Hz
|
||||
timer_set_period(VFD_TIMER, 0xffff/LENGTH(driver_data)/100); // set the refresh frequency
|
||||
timer_enable_irq(VFD_TIMER, TIM_DIER_UIE); // enable interrupt for timer
|
||||
nvic_enable_irq(VFD_TIMER_IRQ); // allow interrupt for timer
|
||||
|
||||
vfd_clear(); // initialize values
|
||||
}
|
||||
|
||||
#if (VFD_SPI==SPI1)
|
||||
void spi1_isr(void)
|
||||
#elif (VFD_SPI==SPI2)
|
||||
void spi2_isr(void)
|
||||
#endif
|
||||
{
|
||||
if (SPI_SR(VFD_SPI) & SPI_SR_TXE) { // transmission buffer empty
|
||||
if (spi_i<LENGTH(driver_data[0])) { // check if data is available
|
||||
gpio_clear(VFD_PORT, VFD_NLE); // slave select to latch data
|
||||
spi_send(VFD_SPI, driver_data[vfd_grid][spi_i++]); // send next data
|
||||
} else { // all data transmitted
|
||||
spi_disable_tx_buffer_empty_interrupt(VFD_SPI); // no need to wait for new data
|
||||
while (SPI_SR(VFD_SPI) & SPI_SR_BSY); // wait for data to be shifted out
|
||||
spi_disable_tx_buffer_empty_interrupt(VFD_SPI); // no need to wait for new data
|
||||
gpio_set(VFD_PORT, VFD_NLE); // output latched data
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#if (VFD_TIMER==TIM2)
|
||||
void tim2_isr(void)
|
||||
#elif (VFD_TIMER==TIM3)
|
||||
void tim3_isr(void)
|
||||
#elif (VFD_TIMER==TIM4)
|
||||
void tim4_isr(void)
|
||||
#elif (VFD_TIMER==TIM5)
|
||||
void tim5_isr(void)
|
||||
#endif
|
||||
{
|
||||
if (timer_get_flag(VFD_TIMER, TIM_SR_UIF)) { // overflow even happened
|
||||
timer_clear_flag(VFD_TIMER, TIM_SR_UIF); // clear flag
|
||||
spi_i = 0; // set the register to shift out
|
||||
spi_enable_tx_buffer_empty_interrupt(VFD_SPI); // enable TX empty interrupt
|
||||
vfd_grid = (vfd_grid+1)%LENGTH(driver_data); // got to next segment
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,39 @@
|
|||
/* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
/* Copyright (c) 2016 King Kévin <kingkevin@cuvoodoo.info> */
|
||||
/* this library is used to drive the vacuum fluorescent display extracted from a Samsung SER-6500 cash register
|
||||
* it uses three chained supertex HV518 shift register VFD drivers */
|
||||
|
||||
/* the number of blocks available on the VFD */
|
||||
#define VFD_DRIVERS 3
|
||||
#define VFD_DIGITS 10
|
||||
#define VFD_MATRIX 12
|
||||
|
||||
/* set digit <nb> to ASCII character <c>
|
||||
* use the MSB of <c> to enable the dot */
|
||||
void vfd_digit(uint8_t nb, char c);
|
||||
/* set dot matrix <nb> to ASCII character <c>
|
||||
* non ASCII characters are used for pictures */
|
||||
void vfd_matrix(uint8_t nb, char c);
|
||||
/* clear VFD display */
|
||||
void vfd_clear(void);
|
||||
/* test VFD display (light up all anodes) */
|
||||
void vfd_test(void);
|
||||
/* transmit every digit and matrix */
|
||||
void vfd_on(void);
|
||||
/* switch VFD display off */
|
||||
void vfd_off(void);
|
||||
/* setup VFD */
|
||||
void vfd_setup(void);
|
||||
Loading…
Reference in New Issue