stm8 ADC DMA采集多路数据问题
论坛里有没有人用过stm8l ADC DMA方式采集多路数据的，最近在使用的时候碰到一个问题，使用ADC1采样6个通道数据，采用DMA方式，采样结果通过串口显示出来，DAM通过定时器控制，每秒启动一次，一次采集8组DMA数据，多数时候六个通道数据采样都正确，发现偶尔会有一组数据出错，六个通道的采样数据均不对， 尝试了各种办法一直没解决，特向大家求助。/* Enable ADC1 clock */
CLK_PeripheralClockConfig(CLK_Peripheral_ADC1, ENABLE);
delay_10us(3);
/* Enable DMA1 clock */
CLK_PeripheralClockConfig(CLK_Peripheral_DMA1, ENABLE);
delay_10us(3);
DMA_GlobalDeInit();
DMA_DeInit(DMA1_Channel0);
ADC_DeInit(ADC1);
/* Initialize and configure ADC1 */
ADC_Init(ADC1, ADC_ConversionMode_Continuous, ADC_Resolution_12Bit, ADC_Prescaler_2);
ADC_SamplingTimeConfig(ADC1, ADC_Group_SlowChannels, ADC_SamplingTime_384Cycles);
ADC_SamplingTimeConfig(ADC1, ADC_Group_FastChannels, ADC_SamplingTime_384Cycles);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 Channels 1 */
ADC_ChannelCmd(ADC1, ADC_Channel_1, ENABLE); /* connected to Potentiometer RV */
/* Enable ADC1 Channels 2 */
ADC_ChannelCmd(ADC1, ADC_Channel_2, ENABLE); /* connected to Potentiometer RV */
/* Enable ADC1 Channels 8 */
ADC_ChannelCmd(ADC1, ADC_Channel_8, ENABLE); /* connected to Potentiometer RV */
/* Enable ADC1 Channels 10 */
ADC_ChannelCmd(ADC1, ADC_Channel_10, ENABLE); /* connected to Potentiometer RV */
/* Enable ADC_Channel_TempSensor */
ADC_ChannelCmd(ADC1, ADC_Channel_TempSensor, ENABLE); /* connected to Potentiometer RV */
ADC_TempSensorCmd(ENABLE);
ADC_SchmittTriggerConfig(ADC1, ADC_Channel_TempSensor, DISABLE);
// Vref
ADC_VrefintCmd(ENABLE);
ADC_ChannelCmd(ADC1, ADC_Channel_Vrefint, ENABLE);
ADC_SchmittTriggerConfig(ADC1, ADC_Channel_Vrefint, DISABLE);
/* Connect ADC to DMA channel 0 */
SYSCFG_REMAPDMAChannelConfig(REMAP_DMA1Channel_ADC1ToChannel0);
DMA_Init(DMA1_Channel0, (uint32_t)(&AdcBuffer),
ADC1_DR_ADDRESS,
//(uint16_t)(sizeof(AdcBuffer) / 2),
6,
DMA_DIR_PeripheralToMemory,
DMA_Mode_Circular,
DMA_MemoryIncMode_Inc,
DMA_Priority_High,
DMA_MemoryDataSize_HalfWord);
/* DMA Channel0 enable */
DMA_Cmd(DMA1_Channel0, ENABLE);
/* Enable DMA1 channel0 Transfer complete interrupt */
DMA_ITConfig(DMA1_Channel0, DMA_ITx_TC, ENABLE);
/* DMA enable */
DMA_GlobalCmd(ENABLE);
/* Enable ADC1 DMA requests*/
ADC_DMACmd(ADC1, ENABLE);
delay_ms(5);
/* start ADC convertion by software */
ADC_SoftwareStartConv(ADC1);
}
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