/**
******************************************************************************
* @file main.c
* @author MCU Application Team
* @brief Main program body
******************************************************************************
* @attention
*
* © Copyright (c) 2023 Puya Semiconductor Co.
* All rights reserved.
*
* This software component is licensed by Puya under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
* @attention
*
* © Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "py32f403xx_ll_Start_Kit.h"
/* Private define ------------------------------------------------------------*/
#define ADC_CALIBRATION_TIMEOUT_MS 2
#define USE_TIMEOUT 0
/* Private variables ---------------------------------------------------------*/
/* Private user code ---------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void APP_SystemClockConfig(void);
static void APP_AdcConfig(void);
static void APP_AdcCalibrate(void);
static void APP_TimConfig(void);
/**
* @brief Main program.
* @param None
* @retval int
*/
int main(void)
{
/* Enable SYSCFG and PWR clock */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
/* 3 bits for pre-emption priority, 0 bits for subpriority */
NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_3);
/* Configure system clock */
APP_SystemClockConfig();
BSP_LED_Init(LED_GREEN);
BSP_USART_Config();
/* ADC configuration */
APP_AdcConfig();
/* ADC calibration */
APP_AdcCalibrate();
LL_mDelay(1);
/* Enable ADC */
LL_ADC_Enable(ADC1);
LL_mDelay(1);
LL_ADC_REG_StartConversionExtTrig(ADC1, LL_ADC_REG_TRIG_EXT_RISING);
/* TIM configuration */
APP_TimConfig();
while (1)
{
}
}
/**
* @brief Watchdog callback function
* @param None
* @retval None
*/
void APP_AdcAnalogWatchdogCallback(void)
{
BSP_LED_On(LED_GREEN);
}
/**
* @brief TIM Configuration Function.
* @param None
* @retval None
*/
static void APP_TimConfig()
{
/* Enable TIM3 clock */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM3);
/* Set TIM3 prescaler */
LL_TIM_SetPrescaler(TIM3,2000);
/* Set TIM3 automatic reload value */
LL_TIM_SetAutoReload(TIM3, 4000);
/* Set TIM3 update trigger */
LL_TIM_SetTriggerOutput(TIM3,LL_TIM_TRGO_UPDATE);
/* Enable TIM3 */
LL_TIM_EnableCounter(TIM3);
}
/**
* @brief ADC Configuration Function.
* @param None
* @retval None
*/
static void APP_AdcConfig()
{
/* Enable GPIOA clock */
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
/* Configure PA4 as analog mode*/
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_4, LL_GPIO_MODE_ANALOG);
/* Enable ADC clock */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC1);
/* Set ADC to PCLK Quad */
LL_RCC_SetADCClockSource(LL_RCC_ADC_CLKSOURCE_PCLK2_DIV4);
/* Set the resolution to 12 bits */
LL_ADC_SetResolution(ADC1, LL_ADC_RESOLUTION_12B);
/* Set data right alignment */
LL_ADC_SetDataAlignment(ADC1, LL_ADC_DATA_ALIGN_RIGHT);
/* Disable scanning mode */
LL_ADC_SetSequencersScanMode(ADC1, LL_ADC_SEQ_SCAN_DISABLE);
/* Set General Group Trigger TIM3 TRGO */
LL_ADC_REG_SetTriggerSource(ADC1, LL_ADC_REG_TRIG_EXT_TIM3_TRGO);
/* Set regular group single conversion mode */
LL_ADC_REG_SetContinuousMode(ADC1, LL_ADC_REG_CONV_SINGLE);
/* Set regular group DMA mode None */
LL_ADC_REG_SetDMATransfer(ADC1, LL_ADC_REG_DMA_TRANSFER_NONE);
/* Set regular group sequence length bit 1 */
LL_ADC_REG_SetSequencerLength(ADC1, LL_ADC_REG_SEQ_SCAN_DISABLE);
/* Disable regular group discont mode */
LL_ADC_REG_SetSequencerDiscont(ADC1, LL_ADC_REG_SEQ_DISCONT_DISABLE);
/* Set regular group RANK1 channel 4 */
LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_4);
/* Set the sampling time to 41.5Cycles */
LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_4, LL_ADC_SAMPLINGTIME_41CYCLES_5);
/* Set channel 4 as the watchdog channel */
LL_ADC_SetAnalogWDMonitChannels(ADC1, LL_ADC_AWD_CHANNEL_4_REG);
/* Set the upper limit of the watchdog to 0x800 */
LL_ADC_SetAnalogWDThresholds(ADC1, LL_ADC_AWD_THRESHOLD_HIGH,0x800);
/* Set the lower limit of the watchdog to 0x000 */
LL_ADC_SetAnalogWDThresholds(ADC1, LL_ADC_AWD_THRESHOLD_LOW, 0x000);
/* Enable watchdog interrupt */
LL_ADC_EnableIT_AWD1(ADC1);
NVIC_SetPriority(ADC1_2_IRQn, 0);
NVIC_EnableIRQ(ADC1_2_IRQn);
}
/**
* @brief ADC calibration function.
* @param None
* @retval None
*/
static void APP_AdcCalibrate()
{
#if (USE_TIMEOUT == 1)
uint32_t Timeout = 0; /* Variable used for timeout management */
#endif /* USE_TIMEOUT */
if (LL_ADC_IsEnabled(ADC1) == 0)
{
/* Enable ADC calibration */
LL_ADC_StartCalibration(ADC1);
/* Poll for ADC effectively calibrated */
#if (USE_TIMEOUT == 1)
Timeout = ADC_CALIBRATION_TIMEOUT_MS;
#endif /* USE_TIMEOUT */
while (LL_ADC_IsCalibrationOnGoing(ADC1) != 0)
{
#if (USE_TIMEOUT == 1)
/* Check Systick counter flag to decrement the time-out value */
if (LL_SYSTICK_IsActiveCounterFlag())
{
if(Timeout-- == 0)
{
APP_ErrorHandler();
}
}
#endif /* USE_TIMEOUT */
}
/* if(LL_ADC_GetCalibrationOffsetStatus(ADC1)!=LL_ADC_CAL_OFFSET_STATUS_SUCCESS) */
/* { */
/* APP_ErrorHandler(); */
/* } */
}
}
/**
* @brief Configure system clock
* @param None
* @retval None
*/
static void APP_SystemClockConfig(void)
{
/* Enable HSI */
LL_RCC_HSI_Enable();
while(LL_RCC_HSI_IsReady() != 1)
{
}
/* Set AHB prescaler: HCLK = SYSCLK */
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
/* Select HSI as system clock source */
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSI);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI)
{
}
/* Set APB1 & APB2 prescaler: PCLK1 = HCLK, PCLK2 = HCLK/2 */
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_2);
/* Set systick to 1ms in using frequency set to 8MHz */
LL_Init1msTick(8000000);
/* Update the SystemCoreClock global variable(which can be updated also through SystemCoreClockUpdate function) */
LL_SetSystemCoreClock(8000000);
}
/**
* @brief Error handling function
* @param None
* @retval None
*/
void APP_ErrorHandler(void)
{
/* Infinite loop */
while (1)
{
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file：Pointer to the source file name
* @param line：assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* User can add His own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/