2018-01-24 16:36:19 +01:00
|
|
|
/* 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/>.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
/** BusVoodoo UART mode (code)
|
|
|
|
* @file busvoodoo_uart.c
|
|
|
|
* @author King Kévin <kingkevin@cuvoodoo.info>
|
|
|
|
* @date 2018
|
|
|
|
* @note peripherals used: USART @ref busvoodoo_uart
|
|
|
|
*/
|
|
|
|
/* standard libraries */
|
|
|
|
#include <stdint.h> // standard integer types
|
|
|
|
#include <stdlib.h> // standard utilities
|
|
|
|
#include <string.h> // string utilities
|
|
|
|
|
|
|
|
/* STM32 (including CM3) libraries */
|
|
|
|
#include <libopencm3/stm32/gpio.h> // general purpose input output library
|
|
|
|
#include <libopencm3/stm32/rcc.h> // real-time control clock library
|
|
|
|
#include <libopencm3/stm32/usart.h> // USART utilities
|
|
|
|
|
|
|
|
/* own libraries */
|
|
|
|
#include "global.h" // board definitions
|
|
|
|
#include "print.h" // printing utilities
|
|
|
|
#include "menu.h" // menu definitions
|
|
|
|
#include "busvoodoo_global.h" // BusVoodoo definitions
|
2018-02-06 12:33:00 +01:00
|
|
|
#include "busvoodoo_oled.h" // OLED utilities
|
2018-01-24 16:36:19 +01:00
|
|
|
#include "busvoodoo_uart.h" // own definitions
|
|
|
|
|
|
|
|
/** @defgroup busvoodoo_uart USART peripheral used for UART communication
|
|
|
|
* @{
|
|
|
|
*/
|
|
|
|
#define BUSVOODOO_USART_ID 3 /**< USART peripheral */
|
|
|
|
/** @} */
|
|
|
|
|
|
|
|
/** mode setup stage */
|
|
|
|
static enum busvoodoo_uart_setting_t {
|
|
|
|
BUSVOODOO_UART_SETTING_NONE,
|
|
|
|
BUSVOODOO_UART_SETTING_BAUDRATE,
|
|
|
|
BUSVOODOO_UART_SETTING_DATABITS,
|
|
|
|
BUSVOODOO_UART_SETTING_PARITY,
|
|
|
|
BUSVOODOO_UART_SETTING_STOPBITS,
|
|
|
|
BUSVOODOO_UART_SETTING_DRIVE,
|
|
|
|
BUSVOODOO_UART_SETTING_DONE,
|
|
|
|
} busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_NONE;
|
|
|
|
/** UART baud rate (in bps) */
|
|
|
|
uint32_t busvoodoo_uart_baudrate = 115200;
|
|
|
|
/** UART data bits */
|
|
|
|
uint8_t busvoodoo_uart_databits = 8;
|
|
|
|
/** UART parity setting */
|
|
|
|
char busvoodoo_uart_parity= 'n';
|
|
|
|
/** UART stop bits (multiplied by 2) */
|
|
|
|
uint8_t busvoodoo_uart_stopbits = 2;
|
|
|
|
/** pin drive mode */
|
|
|
|
char busvoodoo_uart_drive = 'p';
|
|
|
|
|
|
|
|
/** setup UART mode
|
|
|
|
* @param[out] prefix terminal prompt prefix
|
|
|
|
* @param[in] line terminal prompt line to configure mode
|
|
|
|
* @return if setup is complete
|
|
|
|
*/
|
|
|
|
static bool busvoodoo_uart_setup(char** prefix, const char* line)
|
|
|
|
{
|
|
|
|
bool complete = false; // is the setup complete
|
|
|
|
static char config[39] = {0}; // configuration string used as prefix
|
|
|
|
if (NULL==line) { // first call
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_NONE; // re-start configuration
|
|
|
|
}
|
|
|
|
switch (busvoodoo_uart_setting) {
|
|
|
|
case BUSVOODOO_UART_SETTING_NONE:
|
|
|
|
snprintf(config, LENGTH(config), "baud rate in bps (1-2000000) [%u]", busvoodoo_uart_baudrate);
|
|
|
|
*prefix = config; // ask for baud rate
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_BAUDRATE;
|
|
|
|
break;
|
|
|
|
case BUSVOODOO_UART_SETTING_BAUDRATE:
|
|
|
|
if (NULL==line || 0==strlen(line)) { // use default setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DATABITS; // go to next setting
|
|
|
|
} else { // setting provided
|
|
|
|
uint32_t baudrate = atoi(line); // parse setting
|
|
|
|
if (baudrate>0 && baudrate<2000000) { // check setting
|
|
|
|
busvoodoo_uart_baudrate = baudrate; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DATABITS; // go to next setting
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (BUSVOODOO_UART_SETTING_DATABITS==busvoodoo_uart_setting) { // if next setting
|
|
|
|
snprintf(config, LENGTH(config), "data bits (8-9) [%u]", busvoodoo_uart_databits); // prepare next setting
|
|
|
|
*prefix = config; // display next setting
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case BUSVOODOO_UART_SETTING_DATABITS:
|
|
|
|
if (NULL==line || 0==strlen(line)) { // use default setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_PARITY; // go to next setting
|
|
|
|
} else { // setting provided
|
|
|
|
uint8_t databits = atoi(line); // parse setting
|
|
|
|
if (8==databits || 9==databits) { // check setting
|
|
|
|
busvoodoo_uart_databits = databits; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_PARITY; // go to next setting
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (BUSVOODOO_UART_SETTING_PARITY==busvoodoo_uart_setting) { // if next setting
|
|
|
|
snprintf(config, LENGTH(config), "parity (n,e,o) [%c]", busvoodoo_uart_parity); // prepare next setting
|
|
|
|
*prefix = config; // display next setting
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case BUSVOODOO_UART_SETTING_PARITY:
|
|
|
|
if (NULL==line || 0==strlen(line)) { // use default setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_STOPBITS; // go to next setting
|
|
|
|
} else { // setting provided
|
|
|
|
if (0==strcmp("n", line) || 0==strcmp("e", line) || 0==strcmp("o", line)) { // check setting
|
|
|
|
busvoodoo_uart_parity = line[0]; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_STOPBITS; // go to next setting
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (BUSVOODOO_UART_SETTING_STOPBITS==busvoodoo_uart_setting) { // if next setting
|
|
|
|
snprintf(config, LENGTH(config), "stop bits (0.5-2.0) [%.1f]", busvoodoo_uart_stopbits/2.0); // prepare next setting
|
|
|
|
*prefix = config; // display next setting
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case BUSVOODOO_UART_SETTING_STOPBITS:
|
|
|
|
if (NULL==line || 0==strlen(line)) { // use default setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DRIVE; // go to next setting
|
|
|
|
} else { // setting provided
|
|
|
|
if (0==strcmp("0.5", line) || 0==strcmp(".5", line)) { // check setting
|
|
|
|
busvoodoo_uart_stopbits = 1; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DRIVE; // go to next setting
|
|
|
|
} else if (0==strcmp("1", line) || 0==strcmp("1.0", line)) { // check setting
|
|
|
|
busvoodoo_uart_stopbits = 2; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DRIVE; // go to next setting
|
|
|
|
} else if (0==strcmp("1.5", line)) { // check setting
|
|
|
|
busvoodoo_uart_stopbits = 3; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DRIVE; // go to next setting
|
|
|
|
} else if (0==strcmp("2", line) || 0==strcmp("2.0", line)) { // check setting
|
|
|
|
busvoodoo_uart_stopbits = 4; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DRIVE; // go to next setting
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (BUSVOODOO_UART_SETTING_DRIVE==busvoodoo_uart_setting) { // if next setting
|
|
|
|
printf("p) push-pull (3.3V)\n");
|
2018-01-24 21:29:22 +01:00
|
|
|
printf("o) open-drain (set lV do desired voltage), with embedded pull-up (2kO)\n");
|
2018-01-24 16:36:19 +01:00
|
|
|
snprintf(config, LENGTH(config), "drive mode (p,o) [%c]", busvoodoo_uart_drive); // show drive mode
|
|
|
|
*prefix = config; // display next setting
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case BUSVOODOO_UART_SETTING_DRIVE:
|
|
|
|
if (NULL==line || 0==strlen(line)) { // use default setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DONE; // go to next setting
|
|
|
|
} else { // setting provided
|
|
|
|
if (0==strcmp("p", line) || 0==strcmp("o", line)) { // check setting
|
|
|
|
busvoodoo_uart_drive = line[0]; // remember setting
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_DONE; // go to next setting
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (BUSVOODOO_UART_SETTING_DONE==busvoodoo_uart_setting) { // we have all settings, configure UART
|
|
|
|
rcc_periph_clock_enable(USART_RCC(BUSVOODOO_USART_ID)); // enable clock for USART peripheral
|
|
|
|
usart_set_baudrate(USART(BUSVOODOO_USART_ID), busvoodoo_uart_baudrate); // set baud rate
|
|
|
|
usart_set_databits(USART(BUSVOODOO_USART_ID), busvoodoo_uart_databits); // set data bits
|
|
|
|
switch (busvoodoo_uart_parity) { // set parity
|
|
|
|
case 'n':
|
|
|
|
usart_set_parity(USART(BUSVOODOO_USART_ID), USART_PARITY_NONE);
|
|
|
|
break;
|
|
|
|
case 'e':
|
|
|
|
usart_set_parity(USART(BUSVOODOO_USART_ID), USART_PARITY_EVEN);
|
|
|
|
break;
|
|
|
|
case 'o':
|
|
|
|
usart_set_parity(USART(BUSVOODOO_USART_ID), USART_PARITY_ODD);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
usart_set_parity(USART(BUSVOODOO_USART_ID), USART_PARITY_NONE);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
switch (busvoodoo_uart_stopbits) { // set stop bits
|
|
|
|
case 1:
|
|
|
|
usart_set_stopbits(USART(BUSVOODOO_USART_ID), USART_STOPBITS_0_5);
|
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
usart_set_stopbits(USART(BUSVOODOO_USART_ID), USART_STOPBITS_1);
|
|
|
|
break;
|
|
|
|
case 3:
|
|
|
|
usart_set_stopbits(USART(BUSVOODOO_USART_ID), USART_STOPBITS_1_5);
|
|
|
|
break;
|
|
|
|
case 4:
|
|
|
|
usart_set_stopbits(USART(BUSVOODOO_USART_ID), USART_STOPBITS_2);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
usart_set_stopbits(USART(BUSVOODOO_USART_ID), USART_STOPBITS_1);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
usart_set_flow_control(USART(BUSVOODOO_USART_ID), USART_FLOWCONTROL_NONE); // set hardware flow control
|
|
|
|
usart_set_mode(USART(BUSVOODOO_USART_ID), USART_MODE_TX_RX); // full-duplex communication
|
|
|
|
switch (busvoodoo_uart_drive) { // set drive mode
|
|
|
|
case 'p':
|
|
|
|
busvoodoo_embedded_pullup(false); // disable embedded pull-ups
|
|
|
|
gpio_set_mode(USART_PORT(BUSVOODOO_USART_ID), GPIO_MODE_OUTPUT_10_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, USART_PIN_TX(BUSVOODOO_USART_ID)); // setup GPIO pin USART transmit
|
|
|
|
gpio_set_mode(USART_PORT(BUSVOODOO_USART_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, USART_PIN_RX(BUSVOODOO_USART_ID)); // setup GPIO pin USART receive
|
|
|
|
gpio_set(USART_PORT(BUSVOODOO_USART_ID), USART_PIN_RX(BUSVOODOO_USART_ID)); // pull up to avoid noise when not connected
|
|
|
|
break;
|
|
|
|
case 'o':
|
|
|
|
busvoodoo_embedded_pullup(true); // enable embedded pull-ups
|
|
|
|
gpio_set_mode(USART_PORT(BUSVOODOO_USART_ID), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, USART_PIN_TX(BUSVOODOO_USART_ID)); // setup GPIO pin USART transmit
|
|
|
|
gpio_set_mode(USART_PORT(BUSVOODOO_USART_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, USART_PIN_RX(BUSVOODOO_USART_ID)); // setup GPIO pin USART receive
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
usart_enable(USART(BUSVOODOO_USART_ID)); // enable USART
|
2018-01-24 21:29:22 +01:00
|
|
|
led_off(); // disable LED because there is no activity
|
2018-01-24 16:36:19 +01:00
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_NONE; // restart settings next time
|
|
|
|
*prefix = "UART"; // display mode
|
2018-02-06 12:33:00 +01:00
|
|
|
busvoodoo_oled_text_left("UART"); // set mode title on OLED display
|
2018-02-12 13:30:21 +01:00
|
|
|
const char* pinout_io[10] = {"GND", "3V3", "5V", "LV", "Rx", "Tx", NULL, NULL}; // HiZ mode pinout
|
2018-02-06 17:35:14 +01:00
|
|
|
for (uint8_t i=0; i<LENGTH(pinout_io) && i<LENGTH(busvoodoo_global_pinout_io); i++) {
|
|
|
|
busvoodoo_global_pinout_io[i] = pinout_io[i]; // set pin names
|
|
|
|
}
|
|
|
|
busvoodoo_oled_text_pinout(pinout_io, true); // set pinout on display
|
2018-02-06 12:33:00 +01:00
|
|
|
busvoodoo_oled_update(); // update display to show text and pinout
|
|
|
|
complete = true; // configuration is complete
|
2018-01-24 16:36:19 +01:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
default: // unknown case
|
|
|
|
busvoodoo_uart_setting = BUSVOODOO_UART_SETTING_NONE; // restart settings next time
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return complete;
|
|
|
|
}
|
|
|
|
|
|
|
|
/** exit UART mode
|
|
|
|
*/
|
|
|
|
static void busvoodoo_uart_exit(void)
|
|
|
|
{
|
|
|
|
usart_disable(USART(BUSVOODOO_USART_ID)); // disable USART
|
|
|
|
rcc_periph_clock_enable(USART_RCC(BUSVOODOO_USART_ID)); // disable domain clock
|
|
|
|
gpio_set_mode(USART_PORT(BUSVOODOO_USART_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, USART_PIN_TX(BUSVOODOO_USART_ID)); // set pin back to floating input
|
|
|
|
gpio_set_mode(USART_PORT(BUSVOODOO_USART_ID), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, USART_PIN_RX(BUSVOODOO_USART_ID)); // set pin back to floating input
|
|
|
|
busvoodoo_embedded_pullup(false); // disable embedded pull-ups
|
|
|
|
}
|
|
|
|
|
|
|
|
// command handlers
|
|
|
|
|
|
|
|
/** command to transmit a word
|
|
|
|
* @param[in] argument word to transmit
|
|
|
|
*/
|
|
|
|
static void busvoodoo_uart_command_transmit(void* argument)
|
|
|
|
{
|
|
|
|
if (NULL==argument || 0==strlen(argument)) { // nothing to transmit
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
uint16_t i=0;
|
|
|
|
while (((char*)(argument))[i]) { // go through word to send
|
|
|
|
usart_send_blocking(USART(BUSVOODOO_USART_ID), ((char*)(argument))[i++]); // send character
|
2018-01-24 21:29:22 +01:00
|
|
|
busvoodoo_led_red(100); // enable red LED to show transmission
|
2018-01-24 16:36:19 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/** command to receive data
|
|
|
|
* @param[in] argument no argument required
|
|
|
|
*/
|
|
|
|
static void busvoodoo_uart_command_receive(void* argument)
|
|
|
|
{
|
|
|
|
(void)argument; // we won't use the argument
|
2018-01-25 11:31:27 +01:00
|
|
|
printf("press any key to exit\n");
|
|
|
|
while (!user_input_available) { // check for user input to exit
|
|
|
|
if ((USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_RXNE)) { // verify if data has been received
|
|
|
|
char c = usart_recv(USART(BUSVOODOO_USART_ID)); // receive character
|
|
|
|
busvoodoo_led_blue(100); // enable blue LED to show reception
|
|
|
|
printf("%c", c); // print received character
|
|
|
|
}
|
2018-01-24 16:36:19 +01:00
|
|
|
}
|
2018-01-25 11:31:27 +01:00
|
|
|
user_input_get(); // discard user input
|
|
|
|
printf("\n"); // get to next line
|
|
|
|
}
|
|
|
|
|
|
|
|
/** command to transmit and receive data
|
|
|
|
* @param[in] argument no argument required
|
|
|
|
*/
|
|
|
|
static void busvoodoo_uart_command_transceive(void* argument)
|
|
|
|
{
|
|
|
|
(void)argument; // we won't use the argument
|
|
|
|
printf("press 5 times escape to exit\n");
|
|
|
|
char last_c = 0; // last user character received
|
|
|
|
uint8_t esc_count = 0; // number of times escape has press received
|
|
|
|
while (esc_count<5) { // check for escape sequence
|
|
|
|
if (user_input_available) { // check if user wants to transmit something
|
|
|
|
char c = user_input_get(); // get user input
|
|
|
|
if (0x1b==c) { // user pressed escape
|
|
|
|
if (0x1b!=last_c) { // this is the first escape press
|
|
|
|
esc_count = 0;
|
|
|
|
}
|
|
|
|
esc_count++; // increment escape count
|
|
|
|
}
|
2018-02-06 11:56:18 +01:00
|
|
|
last_c = c; // remember key press
|
2018-01-25 11:31:27 +01:00
|
|
|
usart_send_blocking(USART(BUSVOODOO_USART_ID), c); // send user character
|
|
|
|
busvoodoo_led_red(100); // enable red LED to show transmission
|
|
|
|
}
|
|
|
|
if ((USART_SR(USART(BUSVOODOO_USART_ID)) & USART_SR_RXNE)) { // verify if data has been received
|
|
|
|
char c = usart_recv(USART(BUSVOODOO_USART_ID)); // receive character
|
|
|
|
busvoodoo_led_blue(100); // enable blue LED to show reception
|
|
|
|
printf("%c", c); // print received character
|
|
|
|
}
|
|
|
|
}
|
|
|
|
printf("\n"); // get to next line
|
2018-01-24 16:36:19 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct menu_command_t busvoodoo_uart_commands[] = {
|
|
|
|
{
|
|
|
|
'r',
|
|
|
|
"receive",
|
|
|
|
"show incoming data",
|
|
|
|
MENU_ARGUMENT_NONE,
|
|
|
|
NULL,
|
|
|
|
&busvoodoo_uart_command_receive,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
't',
|
|
|
|
"transmit",
|
|
|
|
"transmit word",
|
|
|
|
MENU_ARGUMENT_STRING,
|
|
|
|
"word",
|
|
|
|
&busvoodoo_uart_command_transmit,
|
|
|
|
},
|
2018-01-25 11:31:27 +01:00
|
|
|
{
|
|
|
|
'x',
|
|
|
|
"transceive",
|
|
|
|
"transmit and receive data",
|
|
|
|
MENU_ARGUMENT_NONE,
|
|
|
|
NULL,
|
|
|
|
&busvoodoo_uart_command_transceive,
|
|
|
|
},
|
2018-01-24 16:36:19 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
struct busvoodoo_mode_t busvoodoo_uart_mode = {
|
|
|
|
"uart",
|
|
|
|
"Universal Asynchronous Receiver-Transmitter",
|
|
|
|
&busvoodoo_uart_setup,
|
|
|
|
busvoodoo_uart_commands,
|
|
|
|
LENGTH(busvoodoo_uart_commands),
|
|
|
|
&busvoodoo_uart_exit,
|
|
|
|
};
|