169 lines
5.1 KiB
C
169 lines
5.1 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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*External lines trigger ADC conversion routine:
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*ADC channel 1 (PA1) - injection group channel, external trigger pin (PA15) high
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*level triggers EXTI line 15 event,In this mode, an ADC conversion is triggered
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*by an event on EXTI line 15, and a JEOC interrupt is generated after the conversion
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*is completed.
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*
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*/
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#include "debug.h"
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/* Global Variable */
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s16 Calibrattion_Val = 0;
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/*********************************************************************
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* @fn ADC_Function_Init
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*
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* @brief Initializes ADC collection.
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*
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* @return none
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*/
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void ADC_Function_Init(void)
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{
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ADC_InitTypeDef ADC_InitStructure = {0};
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
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RCC_ADCCLKConfig(RCC_PCLK2_Div8);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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ADC_DeInit(ADC1);
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ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
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ADC_InitStructure.ADC_ScanConvMode = DISABLE;
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ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
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ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigInjecConv_Ext_IT15_TIM8_CC4;
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ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
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ADC_InitStructure.ADC_NbrOfChannel = 1;
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ADC_Init(ADC1, &ADC_InitStructure);
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ADC_InjectedSequencerLengthConfig(ADC1, 1);
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ADC_InjectedChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
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ADC_ExternalTrigInjectedConvCmd(ADC1, ENABLE);
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NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE);
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ADC_Cmd(ADC1, ENABLE);
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ADC_BufferCmd(ADC1, DISABLE); //disable buffer
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ADC_ResetCalibration(ADC1);
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while(ADC_GetResetCalibrationStatus(ADC1));
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ADC_StartCalibration(ADC1);
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while(ADC_GetCalibrationStatus(ADC1));
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Calibrattion_Val = Get_CalibrationValue(ADC1);
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}
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/*********************************************************************
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* @fn EXTI_Event_Init
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*
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* @brief Initializes EXTI.
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*
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* @return none
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*/
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void EXTI_Event_Init(void)
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{
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EXTI_InitTypeDef EXTI_InitStructure = {0};
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
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GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource15);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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EXTI_InitStructure.EXTI_Line = EXTI_Line15;
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EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Event;
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EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
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EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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EXTI_Init(&EXTI_InitStructure);
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}
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/*********************************************************************
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* @fn Get_ConversionVal1
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*
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* @brief Get Conversion Value.
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*
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* @param val - Sampling value
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*
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* @return val+Calibrattion_Val - Conversion Value.
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*/
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u16 Get_ConversionVal(s16 val)
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{
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if((val + Calibrattion_Val) < 0|| val==0)
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return 0;
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if((Calibrattion_Val + val) > 4095 || val==4095)
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return 4095;
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return (val + Calibrattion_Val);
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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SystemCoreClockUpdate();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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ADC_Function_Init();
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printf("CalibrattionValue:%d\n", Calibrattion_Val);
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EXTI_Event_Init();
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while(1);
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}
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void ADC1_2_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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/*********************************************************************
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* @fn ADC1_2_IRQHandler
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*
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* @brief ADC1_2 Interrupt Service Function.
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*
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* @return none
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*/
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void ADC1_2_IRQHandler()
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{
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u16 ADC_val;
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if(ADC_GetITStatus(ADC1, ADC_IT_JEOC))
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{
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printf("ADC Extline trigger conversion...\r\n");
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ADC_val = ADC_GetInjectedConversionValue(ADC1, ADC_InjectedChannel_1);
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printf("JADC%04d\r\n", Get_ConversionVal(ADC_val));
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}
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ADC_ClearITPendingBit(ADC1, ADC_IT_JEOC);
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}
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