reflow-oven-control-sw/stm-firmware/main.c

284 lines
7.3 KiB
C

/* Reflow Oven Controller
*
* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware 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 the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file main.c
* @brief Main file for firmware
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
/* #include <arm_math.h> */
#include <stm32/stm32f4xx.h>
#include <cmsis/core_cm4.h>
#include <setup/system_stm32f4xx.h>
#include <reflow-controller/systick.h>
#include <reflow-controller/adc-meas.h>
#include <reflow-controller/shell.h>
#include <reflow-controller/digio.h>
#include "fatfs/shimatta_sdio_driver/shimatta_sdio.h"
#include <stm-periph/stm32-gpio-macros.h>
#include <stm-periph/clock-enable-manager.h>
#include <stm-periph/uart.h>
#include <reflow-controller/shell-uart-config.h>
#include <reflow-controller/oven-driver.h>
#include <reflow-controller/safety/safety-adc.h>
#include <fatfs/ff.h>
#include <reflow-controller/reflow-menu.h>
bool global_error_state;
static void setup_nvic_priorities(void)
{
/* No sub priorities */
NVIC_SetPriorityGrouping(2);
/* Setup Priorities */
NVIC_SetPriority(ADC_IRQn, 2);
NVIC_SetPriority(DMA2_Stream0_IRQn, 1);
NVIC_SetPriority(DMA2_Stream7_IRQn, 3);
}
FATFS fs;
FATFS * const fs_ptr = &fs;
static inline void uart_gpio_config(void)
{
/*
* In case the application is build in debug mode, use the TX/RX Pins on the debug header
* else the Pins on the DIGIO header are configured in the digio module
*/
#ifdef DEBUGBUILD
rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(SHELL_UART_PORT_RCC_MASK));
SHELL_UART_PORT->MODER &= MODER_DELETE(SHELL_UART_TX_PIN) & MODER_DELETE(SHELL_UART_RX_PIN);
SHELL_UART_PORT->MODER |= ALTFUNC(SHELL_UART_RX_PIN) | ALTFUNC(SHELL_UART_TX_PIN);
SETAF(SHELL_UART_PORT, SHELL_UART_RX_PIN, SHELL_UART_RX_PIN_ALTFUNC);
SETAF(SHELL_UART_PORT, SHELL_UART_TX_PIN, SHELL_UART_TX_PIN_ALTFUNC);
/* Setup Pullup resistor at UART RX */
SHELL_UART_PORT->PUPDR |= PULLUP(SHELL_UART_RX_PIN);
#endif
}
static char shell_uart_tx_buff[128];
static char shell_uart_rx_buff[48];
struct stm_uart shell_uart;
static shellmatta_retCode_t write_shell_callback(const char *data, uint32_t len)
{
uart_send_array_with_dma(&shell_uart, data, len);
return SHELLMATTA_OK;
}
static inline void setup_shell_uart(struct stm_uart *uart)
{
uart->rx = 1;
uart->tx = 1;
uart->brr_val = SHELL_UART_BRR_REG_VALUE;
uart->rcc_reg = &SHELL_UART_RCC_REG;
uart->rcc_bit_no = BITMASK_TO_BITNO(SHELL_UART_RCC_MASK);
uart->uart_dev = SHELL_UART_PERIPH;
uart->dma_rx_buff = shell_uart_rx_buff;
uart->dma_tx_buff = shell_uart_tx_buff;
uart->rx_buff_count = sizeof(shell_uart_rx_buff);
uart->tx_buff_count = sizeof(shell_uart_tx_buff);
uart->base_dma_num = 2;
uart->dma_rx_stream = SHELL_UART_RECEIVE_DMA_STREAM;
uart->dma_tx_stream = SHELL_UART_SEND_DMA_STREAM;
uart->dma_rx_trigger_channel = SHELL_UART_RX_DMA_TRIGGER;
uart->dma_tx_trigger_channel = SHELL_UART_TX_DMA_TRIGGER;
uart_init(uart);
NVIC_EnableIRQ(DMA2_Stream7_IRQn);
}
static bool mount_sd_card_if_avail(bool mounted)
{
FRESULT res;
if (sdio_check_inserted() && mounted) {
memset(fs_ptr, 0, sizeof(FATFS));
return false;
}
if (!sdio_check_inserted() && !mounted) {
res = f_mount(fs_ptr, "0:/", 1);
if (res == FR_OK)
return true;
else
return false;
}
return mounted;
}
static void setup_unused_pins(void)
{
int i;
rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(RCC_AHB1ENR_GPIOEEN));
GPIOE->MODER = 0UL;
for (i = 0; i < 16; i++)
GPIOE->PUPDR |= PULLDOWN(i);
}
static inline void setup_system(void)
{
setup_nvic_priorities();
systick_setup();
adc_pt1000_setup_meas();
oven_driver_init();
digio_setup_default_all();
led_setup();
loudspeaker_setup();
reflow_menu_init();
safety_adc_init();
uart_gpio_config();
setup_shell_uart(&shell_uart);
setup_unused_pins();
}
static void handle_shell_uart_input(shellmatta_handle_t shell_handle)
{
int uart_receive_status;
const char *uart_input;
size_t uart_input_len;
/* Handle UART input for shell */
uart_receive_status = uart_receive_data_with_dma(&shell_uart, &uart_input, &uart_input_len);
if (uart_receive_status >= 0)
shell_handle_input(shell_handle, uart_input, uart_input_len);
}
static void zero_ccm_ram(void)
{
/* These extern variables are placed in the linker script */
extern char _sccmram;
extern char _eccmram;
uint32_t len;
uint32_t i;
uint32_t *ptr = (uint32_t *)&_sccmram;
len = (uint32_t)&_eccmram - (uint32_t)&_sccmram;
for (i = 0; i < len; i++)
ptr[i] = 0UL;
}
/**
* @brief This function sets the appropriate error flags in the oven PID controller
* depending on the Safety ADC measurements.
* The PID controller's error flags have to be cleared via the GUI by either starting a new RUN or explicitly
* ack'ing these errors.
*/
static void propagate_safety_adc_error_to_oven_pid(void)
{
enum safety_adc_check_result safety_adc_result;
safety_adc_result = safety_adc_get_errors();
if (safety_adc_result & SAFETY_ADC_CHECK_TEMP_LOW ||
safety_adc_result & SAFETY_ADC_CHECK_TEMP_HIGH)
oven_pid_report_error(OVEN_PID_ERR_OVERTEMP);
if (safety_adc_result & SAFETY_ADC_CHECK_VREF_LOW ||
safety_adc_result & SAFETY_ADC_CHECK_VREF_HIGH)
oven_pid_report_error(OVEN_PID_ERR_VREF_TOL);
if (safety_adc_result & SAFETY_ADC_INTERNAL_ERROR)
oven_pid_report_error(0);
}
int main(void)
{
bool sd_card_mounted = false;
shellmatta_handle_t shell_handle;
int menu_wait_request;
uint64_t quarter_sec_timestamp = 0ULL;
const struct oven_pid_status *pid_status;
enum adc_pt1000_error pt1000_status;
zero_ccm_ram();
setup_system();
global_error_state = false;
shell_handle = shell_init(write_shell_callback);
shell_print_motd(shell_handle);
while (1) {
sd_card_mounted = mount_sd_card_if_avail(sd_card_mounted);
pid_status = oven_pid_get_status();
if (systick_ticks_have_passed(quarter_sec_timestamp, 250)) {
quarter_sec_timestamp = systick_get_global_tick();
(void)handle_safety_adc();
propagate_safety_adc_error_to_oven_pid();
if (global_error_state)
led_set(0, !led_get(0));
else
led_set(0, 0);
}
pt1000_status = adc_pt1000_check_error();
global_error_state = pid_status->error_set || !!safety_adc_get_errors() || !!pt1000_status;
menu_wait_request = reflow_menu_handle();
/* Deactivate oven output in case of error! */
if (!pid_status->active || global_error_state)
oven_driver_set_power(0U);
handle_shell_uart_input(shell_handle);
if (menu_wait_request)
__WFI();
else
__NOP();
}
return 0;
}
void sdio_wait_ms(uint32_t ms)
{
systick_wait_ms(ms);
}
void DMA2_Stream7_IRQHandler(void)
{
uint32_t hisr = DMA2->HISR;
DMA2->HIFCR = hisr;
if (hisr & DMA_HISR_TCIF7)
uart_tx_dma_complete_int_callback(&shell_uart);
}