在使用STM8S105K6的ADC1的通道一进行AD转换时，转换出来的值不变且恒为2049，而10位AD最多只能到1024 ，程序反复检查也没有发现bug，我是开启了转换完成中断，在中断里面进行读取，ADC1的配置程序如下：
void ADC_Config()
{
/* Init GPIO for ADC1 */
GPIO_Init(GPIOB, GPIO_PIN_1, GPIO_MODE_IN_FL_NO_IT);
GPIO_Init(GPIOB, GPIO_PIN_2, GPIO_MODE_IN_FL_NO_IT);
/* De-Init ADC peripheral*/
ADC1_DeInit();
/* Init ADC1 peripheral */
ADC1_Init(ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_1, ADC1_PRESSEL_FCPU_D18, \
ADC1_EXTTRIG_TIM, DISABLE, ADC1_ALIGN_RIGHT, ADC1_SCHMITTTRIG_CHANNEL1,\
DISABLE);
ADC1_ConversionConfig(ADC1_CONVERSIONMODE_SINGLE,
ADC1_CHANNEL_1,
ADC1_ALIGN_RIGHT);
/* Enable EOC interrupt */
ADC1_ITConfig(ADC1_IT_EOCIE, ENABLE);
/* Enable general interrupts */
enableInterrupts();
/*Start Conversion */
ADC1_Cmd(ENABLE);
ADC1_StartConversion();
}
转换值读出之后通过串口打印出来转换值的读取程序如下：
/* start up converting every 500ms */
INTERRUPT_HANDLER(ADC1_IRQHandler, 22)
{
/* In order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction.
*/
/* Debug code */
if(ADC1_GetFlagStatus(ADC1_FLAG_EOC) == 0x80)
{
printf("ADC CH1 VALUE IS:%d\n\r",ADC1_GetConversionValue());
// printf("%d\n\r",ADC1_AIN1_Value);
ADC1_ClearITPendingBit(ADC1_IT_EOC);
}
} |
|
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