#include "debug.h"// 包含 CH32V307 的头文件，C 标准单元库和delay()函数
#define Num 4096
/* Global Variable */
volatile uint16_t ADC_ConvertedValue;
u16 TxBuf[Num];
s16 Calibrattion_Val = 0;
void TIM2_Init(u32 Per,u32 Prescaler)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = Per;
TIM_TimeBaseStructure.TIM_Prescaler =Prescaler;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//TIM_OutputState_Disable;
TIM_OCInitStructure.TIM_Pulse = 1000;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;//如果是PWM1要为Low，PWM2则为High
TIM_OC2Init(TIM2, & TIM_OCInitStructure);
TIM_Cmd(TIM2, ENABLE); //使能TIMx
TIM_CtrlPWMOutputs(TIM2, ENABLE);
}
/********************************************************************
* 函 数 名 : DMA1_Init
* 函数功能 : DMA 初始化
* 输 入 :
* 输 出 : 无
********************************************************************/
void DMA1_Init()
{
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE); //使能ADC1通道时钟
//DMA1初始化
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->RDATAR; //ADC1地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC_ConvertedValue; //内存地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //方向(从外设到内存)
DMA_InitStructure.DMA_BufferSize = 1; //传输内容的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设地址固定
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable; //内存地址固定
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord ; //外设数据单位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord ; //内存数据单位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular ; //DMA模式：循环传输
DMA_InitStructure.DMA_Priority = DMA_Priority_High ; //优先级：高
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //禁止内存到内存的传输
DMA_Init(DMA1_Channel1, &DMA_InitStructure); //配置DMA1
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC, ENABLE); //使能传输完成中断
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_Cmd(DMA1_Channel1,ENABLE);
}
void DMA1_Channel1__IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void DMA1_Channel1__IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TC1)!=RESET){
//中断处理代码
printf("The current value =%d \r\n",ADC_ConvertedValue);
DMA_ClearITPendingBit(DMA1_IT_TC1);
}
}
/********************************************************************
* 函 数 名 : ADC_Function_Init
* 函数功能 : 初始化ADC
* 输 入 : 无
* 输 出 : 无
********************************************************************/
void ADC_Function_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
TIM2_Init(1000, 144-1);
DMA1_Init();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
RCC_ADCCLKConfig(RCC_PCLK2_Div8); //初始化ADC时钟，设置时钟为PCLK2的8分频
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure); //配置PA1口为AD输入口
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //设置AD模式为单独模式，只使用ADC1
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //禁用多通道模式，启用单通道模式
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //不启动连续转换模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2; //定时器2触发
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //数据右对齐
ADC_InitStructure.ADC_NbrOfChannel = 1; //要转换通道数量
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_1Cycles5 );
ADC_DMACmd(ADC1, ENABLE); //启动DMA
ADC_Cmd(ADC1, ENABLE); //使能ADC
ADC_BufferCmd(ADC1, DISABLE); //disable buffer
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
Calibrattion_Val = Get_CalibrationValue(ADC1);
ADC_BufferCmd(ADC1, ENABLE); //enable buffer
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
}
/*******************************************************************************
* Function Name : main
* Description : Main program.
* Input : None
* Return : None
*******************************************************************************/
int main(void)
{
Delay_Init();
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n",SystemCoreClock);
ADC_Function_Init();
printf("CalibrattionValue:%d\n", Calibrattion_Val);
while(1);
}
