int32_t adc_measure_pm2p5()
{
//
uint16_t val = 0;
if((ADC_SC2_REG(adc_ptr) & ADC_SC2_ADACT_MASK) == 0) {
/* set once conversion mode */
ADC_SC3_REG(adc_ptr) = (ADC_SC3_REG(adc_ptr) & (~ADC_SC3_ADCO_MASK) | ADCO_SINGLE);
/* set sw triger */
ADC_SC2_REG(adc_ptr) = (ADC_SC2_REG(adc_ptr) & (~ADC_SC2_ADTRG_MASK) | ADTRG_SW);
ADC_SC1_REG(adc_ptr,0) = ADC_INPUT_CH;
while(!(ADC_SC1_REG(adc_ptr,0) & ADC_SC1_COCO_MASK)){
//printf("adc calculating...\n");
//_time_delay(1);
}
val = (uint16_t) (ADC_R_REG(adc_ptr,0));
}
else {
printf("Conversion in progress...\n");
_time_delay(50);
val = (uint16_t) (ADC_R_REG(adc_ptr,0));
}
return val;
}
/*************************************************************************
* 野火嵌入式開發工作室
*
* 函數名稱：ad_once
* 功能說明：采集一次一路模擬量的AD值
* 參數說明：ADCn 模塊號（ ADC0、 ADC1）
* ADC_Channel 通道號
* ADC_nbit 精度（ ADC_8bit,ADC_12bit, ADC_10bit, ADC_16bit ）
* 函數返回：無符號結果值
* 修改時間：2012-2-10
* 備 注：參考蘇州大學的例程，B通道不能軟件觸發！！！！
*************************************************************************/
u16 ad_once(ADCn adcn,ADC_Ch ch,ADC_nbit bit) //采集某路模擬量的AD值
{
u16 result = 0;
ASSERT( ((adcn == ADC0) && (ch>=AD8 && ch<=AD18)) || ((adcn == ADC1)&& (ch>=AD4a && ch<=AD17)) ) ; //使用斷言檢測ADCn_CHn是否正常
adc_start(adcn, ch, bit); //啟動ADC轉換
while (( ADC_SC1_REG(ADCx[adcn], 0 ) & ADC_SC1_COCO_MASK ) != ADC_SC1_COCO_MASK);
result = ADC_R_REG(ADCx[adcn],0);
ADC_SC1_REG(ADCx[adcn],0) &= ~ADC_SC1_COCO_MASK;
return result;
}
void
main(void)
{
adc_init();
dma_init();
enter_thread_mode();
sema_wait(&adc_start_sema);
struct dma_ctx *ctx;
ctx = dma_setup(DMAMUX_ADC0, &ADC_R_REG(ADC0, 0), dstbuf, 2, sizeof(dstbuf)/2, DMA_SRC_STICKY | DMA_DOUBLEBUF | DMA_LOOP, dma_done, NULL);
adc_sample_prepare(ADC_MODE_CONTINUOUS);
bf_set_reg(ADC_SC2_REG(ADC0), ADC_SC2_DMAEN, 1);
ADC_SC1_REG(ADC0, 0) = ADC_SC1_ADCH(0) | ADC_SC1_DIFF_MASK;
wait(main);
}
void Io_Adc_Isr(void)
{
uint16 result;
Io_Adc_Data->conversion_ongoing = 0;
Io_Int_DisableInterrupts();
/* Store the value of the last conversion */
result = ADC_R_REG(ADC0,S1A);
/* Conversion value is written in the specific adc_channel_value */
Io_Adc_Data->adc_ch_data[Io_Adc_Data->current_cnv_channel].adc_channel_value = result;
Io_Adc_Data->adc_ch_data[Io_Adc_Data->current_cnv_channel].valid = VALID;
/* Increment the channel */
Io_Adc_Data->current_cnv_channel++;
/* Check if current channel is not the last one */
if (Io_Adc_Data->current_cnv_channel<Io_Adc_ConfigPtr->adc_number_of_channels)
{
/*Read the configuration from the configuration structure of the current channel*/
ADC_CFG2_REG(ADC0) = ADC_CFG2_DEFAULT | Io_Adc_ConfigPtr->adc_config_channel[Io_Adc_Data->current_cnv_channel].adc_channel_config2;
ADC_CFG1_REG(ADC0) = ADC_CFG1_DEFAULT | Io_Adc_ConfigPtr->adc_config_channel[Io_Adc_Data->current_cnv_channel].adc_channel_config1;
/* Restart the conversion for next channel */
ADC_SC1_REG(ADC0,S1A) = IO_ADC_SC1_INTERRUPT_ENABLE_MASK | IO_ADC_SC1_SE_CONVERSION | Io_Adc_ConfigPtr->adc_config_channel[Io_Adc_Data->current_cnv_channel].adc_channel_ID;;
/* Conversion ongoing is set */
Io_Adc_Data->conversion_ongoing = 1;
}
/* Re-enable interrupts */
Io_Int_EnableInterrupts();
}
//============================================================================
//函数名称：hw_ad_once
//函数返回：16位无符号的AD值
//参数说明：MoudelNumber：模块号
// Channel：通道号
// accuracy：精度
//功能概要：采集一次一路模拟量的AD值
//============================================================================
uint16 hw_adc_once(int MoudelNumber,int Channel,uint8 accuracy)//采集某路模拟量的AD值
{
uint16 result = 0;
uint8 ADCCfg1Mode = 0;
ADC_MemMapPtr ADCMoudel;//保存ADC模块地址指针
switch(accuracy)
{
case 8:
ADCCfg1Mode = 0x00;
break;
case 12:
ADCCfg1Mode = 0x01;
break;
case 10:
ADCCfg1Mode = 0x02;
break;
case 16:
ADCCfg1Mode = 0x03;
break;
default:
ADCCfg1Mode = 0x00;
}
if(MoudelNumber==0)//选择ADC模块0
{
ADCMoudel = ADC0_BASE_PTR;
}
else //选择ADC模块1
{
ADCMoudel = ADC1_BASE_PTR;
}
//配置正常电源模式，总线时钟，总线时钟4分频，长采样时间使能，设置精度
ADC_CFG1_REG(ADCMoudel) = ADLPC_NORMAL
| ADC_CFG1_ADIV(ADIV_4)
| ADLSMP_LONG
| ADC_CFG1_MODE(ADCCfg1Mode)
| ADC_CFG1_ADICLK(ADICLK_BUS);
//配置禁止异步时钟使能输出，ADxxat通道选择，高速配置，长采样时间
ADC_CFG2_REG(ADCMoudel) = MUXSEL_ADCA
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_20) ;
//设置通道号
ADC_SC1_REG(ADCMoudel,A) = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(Channel);
//等待转换完成
while (( ADC_SC1_REG(ADCMoudel,A) & ADC_SC1_COCO_MASK ) != ADC_SC1_COCO_MASK)
{
}
//读取转化结果
result = ADC_R_REG(ADCMoudel,A);
//清ADC转换完成标志
ADC_SC1_REG(ADCMoudel,A) &= ~ADC_SC1_COCO_MASK;
return result;
}
