经典_STM32_ADC多通道采样的例子（2） 经典, 通道

yuyang911220

//PA0/1/2 作为模拟通道输入引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚
GPIO_Init(GPIOA, &GPIO_InitStructure);

//PB0/1 作为模拟通道输入引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚
GPIO_Init(GPIOB, &GPIO_InitStructure);

//PC0/1/2/3/4/5 作为模拟通道输入引脚
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚
GPIO_Init(GPIOC, &GPIO_InitStructure);
}

}


void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;

RCC_DeInit(); //RCC 系统复位
RCC_HSEConfig(RCC_HSE_ON); //开启HSE
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE准备好
if(HSEStartUpStatus == SUCCESS)
{
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //EnablePrefetch Buffer
FLASH_SetLatency(FLASH_Latency_2); //Set 2 Latency cycles
RCC_HCLKConfig(RCC_SYSCLK_Div1); //AHB clock = SYSCLK
RCC_PCLK2Config(RCC_HCLK_Div1); //APB2 clock = HCLK
RCC_PCLK1Config(RCC_HCLK_Div2); //APB1 clock = HCLK/2
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_6); //PLLCLK =12MHz * 6 = 72 MHz
RCC_PLLCmd(ENABLE); //Enable PLL
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); //Wait till PLLis ready
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //Select PLL as systemclock source
while(RCC_GetSYSCLKSource() != 0x08); //Wait till PLL is used assystem clock source

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB
| RCC_APB2Periph_GPIOC |RCC_APB2Periph_ADC1 | RCC_APB2Periph_AFIO|RCC_APB2Periph_USART1, ENABLE ); //使能ADC1通道时钟，各个管脚时钟

RCC_ADCCLKConfig(RCC_PCLK2_Div6); //72M/6=12,ADC最大时间不能超过14M
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //使能DMA传输

}
}