308 lines
8.2 KiB
C
308 lines
8.2 KiB
C
/* Reflow Oven Controller
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*
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* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* 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
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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 the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file main.c
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* @brief Main file for firmware
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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/* #include <arm_math.h> */
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#include <stm32/stm32f4xx.h>
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#include <cmsis/core_cm4.h>
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#include <setup/system_stm32f4xx.h>
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#include <reflow-controller/systick.h>
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#include <reflow-controller/adc-meas.h>
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#include <reflow-controller/shell.h>
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#include <reflow-controller/ui/lcd.h>
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#include <reflow-controller/digio.h>
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#include "fatfs/shimatta_sdio_driver/shimatta_sdio.h"
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#include <reflow-controller/temp-converter.h>
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#include <reflow-controller/rotary-encoder.h>
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#include <reflow-controller/pid-controller.h>
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#include <stm-periph/stm32-gpio-macros.h>
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#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>
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#include <helper-macros/helper-macros.h>
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#include <reflow-controller/button.h>
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#include <reflow-controller/oven-driver.h>
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#include <reflow-controller/safety-adc.h>
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#include <fatfs/ff.h>
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static void setup_nvic_priorities()
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{
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/* No sub priorities */
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NVIC_SetPriorityGrouping(2);
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/* Setup Priorities */
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NVIC_SetPriority(ADC_IRQn, 2);
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NVIC_SetPriority(DMA2_Stream0_IRQn, 1);
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NVIC_SetPriority(DMA2_Stream7_IRQn, 3);
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}
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/* Process parameters are defined static globally to be watched in debugger from any context */
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static float pt1000_value;
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static volatile int pt1000_value_status;
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static uint32_t rot;
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static float target_temperature;
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static struct pid_controller pid;
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static volatile enum button_state button;
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FATFS fs;
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FATFS *fs_ptr = &fs;
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static inline void uart_gpio_config()
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{
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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
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* else the Pins on the DIGIO header are configured in the digio module
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*/
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#ifdef DEBUGBUILD
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rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(SHELL_UART_PORT_RCC_MASK));
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SHELL_UART_PORT->MODER &= MODER_DELETE(SHELL_UART_TX_PIN) & MODER_DELETE(SHELL_UART_RX_PIN);
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SHELL_UART_PORT->MODER |= ALTFUNC(SHELL_UART_RX_PIN) | ALTFUNC(SHELL_UART_TX_PIN);
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SETAF(SHELL_UART_PORT, SHELL_UART_RX_PIN, SHELL_UART_RX_PIN_ALTFUNC);
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SETAF(SHELL_UART_PORT, SHELL_UART_TX_PIN, SHELL_UART_TX_PIN_ALTFUNC);
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#endif
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}
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static char shell_uart_tx_buff[128];
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static char shell_uart_rx_buff[48];
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struct stm_uart shell_uart;
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static shellmatta_retCode_t write_shell_callback(const char *data, uint32_t len)
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{
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uart_send_array_with_dma(&shell_uart, data, len);
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return SHELLMATTA_OK;
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}
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static inline void setup_sell_uart(struct stm_uart *uart)
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{
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uart->rx = 1;
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uart->tx = 1;
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uart->brr_val = SHELL_UART_BRR_REG_VALUE;
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uart->rcc_reg = &SHELL_UART_RCC_REG;
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uart->rcc_bit_no = BITMASK_TO_BITNO(SHELL_UART_RCC_MASK);
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uart->uart_dev = SHELL_UART_PERIPH;
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uart->dma_rx_buff = shell_uart_rx_buff;
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uart->dma_tx_buff = shell_uart_tx_buff;
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uart->rx_buff_count = sizeof(shell_uart_rx_buff);
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uart->tx_buff_count = sizeof(shell_uart_tx_buff);
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uart->base_dma_num = 2;
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uart->dma_rx_stream = SHELL_UART_RECEIVE_DMA_STREAM;
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uart->dma_tx_stream = SHELL_UART_SEND_DMA_STREAM;
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uart->dma_rx_trigger_channel = SHELL_UART_RX_DMA_TRIGGER;
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uart->dma_tx_trigger_channel = SHELL_UART_TX_DMA_TRIGGER;
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uart_init(uart);
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NVIC_EnableIRQ(DMA2_Stream7_IRQn);
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}
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static bool mount_sd_card_if_avail(bool mounted)
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{
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FRESULT res;
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if (sdio_check_inserted() && mounted) {
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memset(fs_ptr, 0, sizeof(FATFS));
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return false;
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}
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if (!sdio_check_inserted() && !mounted) {
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res = f_mount(fs_ptr, "0:/", 1);
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if (res == FR_OK) {
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return true;
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} else {
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return false;
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}
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}
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return mounted;
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}
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static inline int32_t handle_pid_controller(struct pid_controller *pid, float target_temperature,
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float current_temperature)
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{
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int32_t pid_out;
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pid_out = (int32_t)pid_sample(pid, target_temperature - current_temperature);
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/* Blink green LED */
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led_set(1, !led_get(1));
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return pid_out;
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}
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static void setup_unused_pins()
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{
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int i;
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rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(RCC_AHB1ENR_GPIOEEN));
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GPIOE->MODER = 0UL;
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for (i = 0; i < 16; i++)
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GPIOE->PUPDR |= PULLDOWN(i);
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}
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static inline void setup_system()
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{
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setup_nvic_priorities();
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systick_setup();
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adc_pt1000_setup_meas();
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oven_driver_init();
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digio_setup_default_all();
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led_setup();
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loudspeaker_setup();
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rotary_encoder_setup();
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button_init();
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lcd_init();
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safety_adc_init();
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uart_gpio_config();
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setup_sell_uart(&shell_uart);
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setup_unused_pins();
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}
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static void handle_shell_uart_input(shellmatta_handle_t shell_handle)
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{
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int uart_receive_status;
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const char *uart_input;
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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);
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if (uart_receive_status >= 0)
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shell_handle_input(shell_handle, uart_input, uart_input_len);
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}
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int main()
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{
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bool sd_card_mounted = false;
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shellmatta_handle_t shell_handle;
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uint64_t pid_timestamp = 0ULL;
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bool pid_controller_active = false;
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int32_t pid_controller_output;
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uint64_t display_timestamp = 0ULL;
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char disp[4][21] = {0};
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enum lcd_fsm_ret lcd_ret = LCD_FSM_NOP;
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int temp_status;
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float current_temp;
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target_temperature = 25.0f;
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setup_system();
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shell_handle = shell_init(write_shell_callback);
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shell_print_motd(shell_handle);
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pid_init(&pid, 0.1, 0.1, 4.0, 0.0, 100.0, 40.0);
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pid_zero(&pid);
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while (1) {
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sd_card_mounted = mount_sd_card_if_avail(sd_card_mounted);
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snprintf(&disp[0][0], 17, "SD %smounted", sd_card_mounted ? "" : "un");
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pt1000_value_status = adc_pt1000_get_current_resistance(&pt1000_value);
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if (systick_ticks_have_passed(pid_timestamp, 250)) {
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(void)handle_safety_adc();
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pid_timestamp = systick_get_global_tick();
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temp_status = temp_converter_convert_resistance_to_temp(pt1000_value,
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¤t_temp);
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if (pt1000_value_status >= 0 && pid_controller_active)
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pid_controller_output = handle_pid_controller(&pid, target_temperature, current_temp);
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/* Blink red led in case of temp error */
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if (pt1000_value_status < 0)
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led_set(0, !led_get(0));
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else
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led_set(0, 0);
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snprintf(&disp[3][0], 17, "Temp: %s%.1f C", (temp_status == 0 ? "" : temp_status < 0 ? "<" : ">")
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, current_temp);
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}
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/* Handle error in case PID controller should be active, but temperature measurement failed */
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if (pid_controller_active && pt1000_value_status < 0) {
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/* Disable the oven controller */
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oven_driver_set_power(0U);
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/* Activate loundspeaker permanently */
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loudspeaker_set(1);
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} else if (pid_controller_active) {
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/* In case temperature measuremnt is okay and controlelr is working, write output power */
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oven_driver_set_power(pid_controller_output < 0 ? 0U : (uint8_t)pid_controller_output);
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}
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button = button_read_event();
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rot = rotary_encoder_get_abs_val();
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oven_driver_set_power(rot > 100U ? 100U : rot);
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/* TODO: handle gui */
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snprintf(&disp[1][0], 17, "Rotary: %u", (unsigned int)rot);
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snprintf(&disp[2][0], 17, "Button: %s", (button == BUTTON_SHORT ? "SHORT" : (button == BUTTON_LONG ? "LONG" : "")));
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handle_shell_uart_input(shell_handle);
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if (systick_ticks_have_passed(display_timestamp, 2) || lcd_ret == LCD_FSM_CALL_AGAIN) {
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lcd_ret = lcd_fsm_write_buffer(disp);
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display_timestamp = systick_get_global_tick();
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}
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if (lcd_ret == LCD_FSM_CALL_AGAIN) {
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/* Nothing */
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} else {
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__WFI();
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}
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}
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}
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void sdio_wait_ms(uint32_t ms)
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{
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systick_wait_ms(ms);
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}
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void DMA2_Stream7_IRQHandler()
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{
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uint32_t hisr = DMA2->HISR;
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DMA2->HIFCR = hisr;
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if (hisr & DMA_HISR_TCIF7) {
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uart_tx_dma_complete_int_callback(&shell_uart);
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}
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}
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