423 lines
12 KiB
C
423 lines
12 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file : main.c
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* @brief : Main program body
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2026 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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#include <stdbool.h>
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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ADC_HandleTypeDef hadc1;
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PCD_HandleTypeDef hpcd_USB_DRD_FS;
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/* USER CODE BEGIN PV */
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_GPIO_Init(void);
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static void MX_ADC1_Init(void);
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static void MX_USB_PCD_Init(void);
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/* USER CODE BEGIN PFP */
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uint16_t ADC_ReadChannel(uint32_t channel);
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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void H_bridge_delay()
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{
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// very rough calculation: body of the loop takes 8 instructions,
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// freq is 12 MHz: 8 / 12e6 * 100 = 0.000066 s, so about 66 ns
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// This calculation could be way off, but it doesn't matter that much
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volatile uint32_t delay = 100;
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while(--delay > 0) {}
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}
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void H_bridge_turn_off()
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{
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HAL_GPIO_WritePin(LS_A_GPIO_Port, LS_A_Pin, GPIO_PIN_RESET);
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HAL_GPIO_WritePin(LS_B_GPIO_Port, LS_B_Pin, GPIO_PIN_RESET);
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HAL_GPIO_WritePin(HS_A_GPIO_Port, HS_A_Pin, GPIO_PIN_RESET);
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HAL_GPIO_WritePin(HS_B_GPIO_Port, HS_B_Pin, GPIO_PIN_RESET);
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}
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void H_bridge_set_direction(bool positive)
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{
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H_bridge_turn_off();
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// delay to make sure all FETs are turned off;
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// not measured, just eyeballing the time
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H_bridge_delay();
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if (positive)
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{
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HAL_GPIO_WritePin(HS_A_GPIO_Port, HS_A_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(LS_B_GPIO_Port, LS_B_Pin, GPIO_PIN_SET);
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}
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else
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{
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HAL_GPIO_WritePin(HS_B_GPIO_Port, HS_B_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(LS_A_GPIO_Port, LS_A_Pin, GPIO_PIN_SET);
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}
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}
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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MX_ADC1_Init();
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MX_USB_PCD_Init();
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/* USER CODE BEGIN 2 */
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H_bridge_turn_off();
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H_bridge_set_direction(true);
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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GPIO_PinState state = GPIO_PIN_RESET;
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const uint32_t polarity_switch_period_iter = 10;
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uint32_t next_polarity_switch_iter = polarity_switch_period_iter;
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bool polarity = true;
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while (1)
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{
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/* USER CODE END WHILE */
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// Read voltages before and after current limiting resistor (R22, 10 ohm)
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uint16_t val_ch0 = ADC_ReadChannel(ADC_CHANNEL_0);
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//uint16_t val_ch1 = ADC_ReadChannel(ADC_CHANNEL_1);
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// Convert to voltage (12-bit, 3.3V reference)
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const float adc_voltage_divider = 2.0f;
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float voltage_ch0 = (val_ch0 * 3.3f) / 4095.0f * adc_voltage_divider;
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//float voltage_ch1 = (val_ch1 * 3.3f) / 4095.0f * adc_voltage_divider;
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// simple bang-bang regulation
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const float target_voltage = 4.5f;
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if (voltage_ch0 < target_voltage)
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{
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state = GPIO_PIN_SET;
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} else {
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state = GPIO_PIN_RESET;
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}
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HAL_GPIO_WritePin(VDD_LEDL_EN_GPIO_Port, VDD_LEDL_EN_Pin, state);
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// Polarity switch (H-bridge control)
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if (--next_polarity_switch_iter == 0)
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{
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next_polarity_switch_iter = polarity_switch_period_iter;
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polarity = !polarity;
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H_bridge_set_direction(polarity);
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}
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/* USER CODE BEGIN 3 */
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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__HAL_FLASH_SET_LATENCY(FLASH_LATENCY_0);
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/** Initializes the RCC Oscillators according to the specified parameters
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* in the RCC_OscInitTypeDef structure.
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSI48;
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RCC_OscInitStruct.HSIState = RCC_HSI_ON;
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RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV4;
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RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
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RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
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{
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Error_Handler();
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}
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}
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/**
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* @brief ADC1 Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_ADC1_Init(void)
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{
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/* USER CODE BEGIN ADC1_Init 0 */
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/* USER CODE END ADC1_Init 0 */
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ADC_ChannelConfTypeDef sConfig = {0};
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/* USER CODE BEGIN ADC1_Init 1 */
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/* USER CODE END ADC1_Init 1 */
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/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
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*/
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hadc1.Instance = ADC1;
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hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV1;
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hadc1.Init.Resolution = ADC_RESOLUTION_12B;
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hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
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hadc1.Init.ScanConvMode = ADC_SCAN_SEQ_FIXED;
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hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
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hadc1.Init.LowPowerAutoWait = DISABLE;
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hadc1.Init.LowPowerAutoPowerOff = DISABLE;
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hadc1.Init.ContinuousConvMode = DISABLE;
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hadc1.Init.NbrOfConversion = 1;
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hadc1.Init.DiscontinuousConvMode = DISABLE;
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hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
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hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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hadc1.Init.DMAContinuousRequests = DISABLE;
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hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
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hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_1CYCLE_5;
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hadc1.Init.OversamplingMode = DISABLE;
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hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
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if (HAL_ADC_Init(&hadc1) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure Regular Channel
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*/
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sConfig.Channel = ADC_CHANNEL_0;
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sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure Regular Channel
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*/
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sConfig.Channel = ADC_CHANNEL_1;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN ADC1_Init 2 */
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/* USER CODE END ADC1_Init 2 */
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}
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/**
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* @brief USB Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_USB_PCD_Init(void)
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{
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/* USER CODE BEGIN USB_Init 0 */
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/* USER CODE END USB_Init 0 */
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/* USER CODE BEGIN USB_Init 1 */
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/* USER CODE END USB_Init 1 */
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hpcd_USB_DRD_FS.Instance = USB_DRD_FS;
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hpcd_USB_DRD_FS.Init.dev_endpoints = 8;
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hpcd_USB_DRD_FS.Init.speed = USBD_FS_SPEED;
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hpcd_USB_DRD_FS.Init.phy_itface = PCD_PHY_EMBEDDED;
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hpcd_USB_DRD_FS.Init.Sof_enable = DISABLE;
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hpcd_USB_DRD_FS.Init.low_power_enable = DISABLE;
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hpcd_USB_DRD_FS.Init.lpm_enable = DISABLE;
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hpcd_USB_DRD_FS.Init.battery_charging_enable = DISABLE;
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hpcd_USB_DRD_FS.Init.vbus_sensing_enable = DISABLE;
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hpcd_USB_DRD_FS.Init.bulk_doublebuffer_enable = DISABLE;
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hpcd_USB_DRD_FS.Init.iso_singlebuffer_enable = DISABLE;
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if (HAL_PCD_Init(&hpcd_USB_DRD_FS) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN USB_Init 2 */
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/* USER CODE END USB_Init 2 */
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}
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/**
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* @brief GPIO Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_GPIO_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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/* USER CODE BEGIN MX_GPIO_Init_1 */
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/* USER CODE END MX_GPIO_Init_1 */
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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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/*Configure GPIO pin Output Level */
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HAL_GPIO_WritePin(GPIOA, HS_B_Pin|LS_B_Pin|LS_A_Pin|HS_A_Pin, GPIO_PIN_RESET);
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/*Configure GPIO pin Output Level */
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HAL_GPIO_WritePin(VDD_LEDL_EN_GPIO_Port, VDD_LEDL_EN_Pin, GPIO_PIN_RESET);
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/*Configure GPIO pins : HS_B_Pin LS_B_Pin LS_A_Pin HS_A_Pin */
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GPIO_InitStruct.Pin = HS_B_Pin|LS_B_Pin|LS_A_Pin|HS_A_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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/*Configure GPIO pin : VDD_LEDL_EN_Pin */
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GPIO_InitStruct.Pin = VDD_LEDL_EN_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(VDD_LEDL_EN_GPIO_Port, &GPIO_InitStruct);
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/* USER CODE BEGIN MX_GPIO_Init_2 */
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/* USER CODE END MX_GPIO_Init_2 */
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}
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/* USER CODE BEGIN 4 */
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uint16_t ADC_ReadChannel(uint32_t channel)
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{
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ADC_ChannelConfTypeDef sConfig = {0};
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// Configure the specific channel
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sConfig.Channel = channel;
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sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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// Start conversion
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if (HAL_ADC_Start(&hadc1) != HAL_OK)
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{
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Error_Handler();
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}
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// Poll for completion (timeout 10ms)
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if (HAL_ADC_PollForConversion(&hadc1, 10) != HAL_OK)
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{
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Error_Handler();
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}
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// Get result
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uint16_t adc_value = HAL_ADC_GetValue(&hadc1);
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// Stop ADC
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HAL_ADC_Stop(&hadc1);
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return adc_value;
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}
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/* USER CODE END 4 */
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* User can add his own implementation to report the HAL error return state */
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__disable_irq();
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while (1)
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{
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}
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/* USER CODE END Error_Handler_Debug */
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* USER CODE BEGIN 6 */
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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