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

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/* 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,
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* 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/>.
*/
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/**
* @file main.c
* @brief Main file for firmware
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
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/* #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"
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#include <stm-periph/stm32-gpio-macros.h>
#include <stm-periph/clock-enable-manager.h>
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#include <stm-periph/uart.h>
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#include <reflow-controller/shell-uart-config.h>
#include <reflow-controller/oven-driver.h>
#include <fatfs/ff.h>
#include <reflow-controller/reflow-menu.h>
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#include <reflow-controller/safety/safety-controller.h>
#include <reflow-controller/settings/settings.h>
static void setup_nvic_priorities(void)
{
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/* No sub priorities */
NVIC_SetPriorityGrouping(2);
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/* Setup Priorities */
NVIC_SetPriority(ADC_IRQn, 2);
NVIC_SetPriority(DMA2_Stream0_IRQn, 1);
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NVIC_SetPriority(DMA2_Stream7_IRQn, 3);
}
FATFS fs;
FATFS * const fs_ptr = &fs;
static inline void uart_gpio_config(void)
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{
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/*
* 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
*/
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#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);
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/* Setup Pullup resistor at UART RX */
SHELL_UART_PORT->PUPDR |= PULLUP(SHELL_UART_RX_PIN);
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#endif
}
static char shell_uart_tx_buff[128];
static char shell_uart_rx_buff[48];
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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)
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{
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;
static uint8_t IN_SECTION(.ccmram) inserted_counter = 0;
if (sdio_check_inserted() && mounted) {
memset(fs_ptr, 0, sizeof(FATFS));
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sdio_stop_clk();
inserted_counter = 0;
return false;
}
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if (!sdio_check_inserted() && inserted_counter < 255)
inserted_counter++;
if (!sdio_check_inserted() && !mounted && inserted_counter > 4) {
inserted_counter = 0;
res = f_mount(fs_ptr, "0:/", 1);
if (res == FR_OK) {
led_set(1, 1);
return true;
}
else
return false;
}
return mounted;
}
static void setup_unused_pins(void)
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{
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)
{
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setup_nvic_priorities();
systick_setup();
oven_driver_init();
digio_setup_default_all();
led_setup();
loudspeaker_setup();
reflow_menu_init();
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uart_gpio_config();
setup_shell_uart(&shell_uart);
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setup_unused_pins();
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safety_controller_init();
adc_pt1000_setup_meas();
}
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static void handle_shell_uart_input(shellmatta_handle_t shell_handle)
{
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int uart_receive_status;
const char *uart_input;
size_t uart_input_len;
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/* Handle UART input for shell */
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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;
}
int main(void)
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{
bool cal_active;
float offset;
float sens;
int status;
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bool sd_card_mounted = false;
bool sd_old;
shellmatta_handle_t shell_handle;
int menu_wait_request;
uint64_t quarter_sec_timestamp = 0ULL;
zero_ccm_ram();
setup_system();
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shell_handle = shell_init(write_shell_callback);
shell_print_motd(shell_handle);
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while (1) {
if (systick_ticks_have_passed(quarter_sec_timestamp, 250)) {
led_set(1, 0);
sd_old = sd_card_mounted;
sd_card_mounted = mount_sd_card_if_avail(sd_card_mounted);
if (sd_card_mounted && !sd_old) {
adc_pt1000_get_resistance_calibration(NULL, NULL, &cal_active);
if (!cal_active) {
status = settings_load_calibration(&sens, &offset);
if (!status) {
adc_pt1000_set_resistance_calibration(offset, sens, true);
}
}
}
quarter_sec_timestamp = systick_get_global_tick();
}
menu_wait_request = reflow_menu_handle();
handle_shell_uart_input(shell_handle);
safety_controller_handle();
oven_driver_set_power(0);
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oven_driver_apply_power_level();
safety_controller_report_timing(ERR_TIMING_MAIN_LOOP);
if (menu_wait_request)
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__WFI();
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else
__NOP();
}
return 0;
}
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void sdio_wait_ms(uint32_t ms)
{
systick_wait_ms(ms);
}
void DMA2_Stream7_IRQHandler(void)
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{
uint32_t hisr = DMA2->HISR;
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DMA2->HIFCR = hisr;
if (hisr & DMA_HISR_TCIF7)
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uart_tx_dma_complete_int_callback(&shell_uart);
}