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move timer to VFD

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This commit is contained in:
King Kévin 2016-01-24 17:26:53 +01:00
parent c7d6b855d9
commit 515ecdfa3a
3 changed files with 52 additions and 30 deletions
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1
main.h → global.h
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@ -24,3 +24,4 @@
/* default output (i.e. for printf) */
int _write(int file, char *ptr, int len);

53
lib/vfd.c
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@ -24,9 +24,11 @@
#include <libopencm3/stm32/rcc.h> // real-time control clock library
#include <libopencm3/stm32/gpio.h> // general purpose input output library
#include <libopencm3/stm32/spi.h> // SPI library
#include <libopencm3/stm32/timer.h> // timer library
#include <libopencm3/cm3/nvic.h> // interrupt handler
#include "vfd.h" // VFD definitions
#include "global.h" // global definitions
#include "vfd.h" // VFD library API
/* get the length of an array */
#define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
@ -60,6 +62,21 @@
/* data input, where the data is shifted to
* drive using SPI MOSI (PA7) */
#define VFD_DIN GPIO_SPI1_MOSI
/* timer for automatic refresh */
#define VFD_TIMER TIM2
#if (VFD_TIMER==TIM2)
#define VFD_TIMER_RCC RCC_TIM2
#define VFD_TIMER_IRQ NVIC_TIM2_IRQ
#elif (VFD_TIMER==TIM3)
#define VFD_TIMER_RCC RCC_TIM3
#define VFD_TIMER_IRQ NVIC_TIM3_IRQ
#elif (VFD_TIMER==TIM4)
#define VFD_TIMER_RCC RCC_TIM4
#define VFD_TIMER_IRQ NVIC_TIM4_IRQ
#elif (VFD_TIMER==TIM5)
#define VFD_TIMER_RCC RCC_TIM5
#define VFD_TIMER_IRQ NVIC_TIM5_IRQ
#endif
/* ASCII characters encoded for 7 segments display
* starts with space
@ -463,6 +480,7 @@ void vfd_off(void)
/* 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
@ -470,10 +488,11 @@ void vfd_setup(void)
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
@ -497,7 +516,18 @@ void vfd_setup(void)
spi_enable_tx_buffer_empty_interrupt(VFD_SPI); // enable TX empty interrupt
nvic_enable_irq(VFD_SPI_IRQ); // enable SPI interrupt
/* 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(0xffff/(VFD_DIGITS+VFD_MATRIX)/150); // set the refresh frequency
timer_set_period(VFD_TIMER, 0xfffff);
timer_enable_irq(VFD_TIMER, TIM_DIER_UIE); // enable interrupt for timer
nvic_enable_irq(VFD_TIMER_IRQ); // allow interrupt for timer
timer_enable_counter(VFD_TIMER); // enable timer
vfd_clear(); // initialize values
}
@ -516,3 +546,20 @@ void spi2_isr(void)
}
}
}
#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
gpio_toggle(LED_PORT, LED_PIN); // toggle LED
}
//gpio_toggle(LED_PORT, LED_PIN); // toggle LED
}

28
main.c
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@ -31,7 +31,7 @@
#include <libopencm3/cm3/nvic.h>
/* own libraries */
#include "main.h" // board definitions
#include "global.h" // board definitions
#include "usart.h" // USART utilities
#include "usb_cdcacm.h" // USB CDC ACM utilities
#include "vfd.h" // VFD driver
@ -65,31 +65,6 @@ static void gpio_setup(void)
gpio_set_mode(LED_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, LED_PIN); // set LED pin to 'output push-pull'
}
static void timer_setup(void)
{
#define VFD_TIMER TIM2
#define VFD_TIMER_RCC RCC_TIM2
#define VFD_TIMER_IRQ NVIC_TIM2_IRQ
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(0xffff/(VFD_DIGITS+VFD_MATRIX)/150); // set the refresh frequency
timer_set_period(VFD_TIMER, 0xffff);
timer_enable_irq(VFD_TIMER, TIM_DIER_CC1IE); // enable interrupt for timer
nvic_enable_irq(VFD_TIMER_IRQ); // allow interrupt for timer
timer_enable_counter(VFD_TIMER); // enable timer
}
void tim2_isr(void)
{
if (timer_get_flag(VFD_TIMER, TIM_SR_UIF)) {
timer_clear_flag(VFD_TIMER, TIM_SR_UIF);
gpio_toggle(LED_PORT, LED_PIN);
}
}
int main(void)
{
SCB_VTOR = (uint32_t) 0x08002000; // relocate vector table because of the bootloader
@ -99,7 +74,6 @@ int main(void)
usart_setup(); // setup USART (for printing)
cdcacm_setup(); // setup USB CDC ACM (for printing)
vfd_setup(); // setup VFD
timer_setup();
setbuf(stdout, NULL); // set standard out buffer to NULL to immediately print
setbuf(stderr, NULL); // set standard error buffer to NULL to immediately print