【STM32F0开发日志/评测/笔记】+adc采集和led闪烁

fengyiyu1006 提问时间：2013-12-19 12:16 /

代码修改自库函数例程ADC_LowPower和IO_Toggle，下面是代码：
#define BSRR_VAL 0x0300

ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

void delay_ms(int i)
{
int s;
while(i--)
{
s=8000;
while(s--);
}
}

int main(void)
{
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);

/* TIM3 Configuration*/
TIM_DeInit(TIM3);

TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

TIM_OCStructInit(&TIM_OCInitStructure);

/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 0xFF;
TIM_TimeBaseStructure.TIM_Prescaler = 0x0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

/* TIM3 TRGO selection */
TIM_SelectOutputTrigger(TIM3, TIM_TRGOSource_Update);

ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_28_5Cycles);
ADC_GetCalibrationFactor(ADC1);
ADC_WaitModeCmd(ADC1, ENABLE);
ADC_AutoPowerOffCmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));

TIM_Cmd(TIM3, ENABLE);

ADC_StartOfConversion(ADC1);

while (1)
{
/* Get ADC1 converted data */
ADC1ConvertedValue = ADC_GetConversionValue(ADC1);

/* Compute the voltage */
ADC1ConvertedVoltage = (ADC1ConvertedValue * 3300)/0xFFF;
/* Set PC8 and PC9 */
GPIOC->BSRR = BSRR_VAL;
delay_ms((int)(ADC1ConvertedVoltage/5));
/* Reset PC8 and PC9 */
GPIOC->BRR = BSRR_VAL;
delay_ms((int)(ADC1ConvertedVoltage/5));
}
}