GoKIT2 ADC DMA 采集模拟值,总是有问题,大神帮忙看下
采集PA0-PA5上的模拟值,各端口均无电压时,就显示除了PA0,1-5均有电压,能正常测量PA0电压程序如下:
#include "adc/ADC2.h"
#include <stdio.h>
/*定义数组变量ADC_ConvertedValue,
__IO uint16_t ADC_ConvertedValue;
void ADC1_conf(void)
{
ADC1_GPIO_Config();
ADC1_Mode_Config();
}
static void ADC1_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable DMA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA,ENABLE);
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;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/* 函数名:ADC1_Mode_Config
* 描述 :配置ADC1的工作模式为MDA模式
* 输入 : 无
* 输出 :无
* 调用 :内部调用
*/
static void ADC1_Mode_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
/* DMA channel1 configuration */
DMA_DeInit(DMA1_Channel1);
/*定义DMA外设基地址,即为存放转换结果的寄存器*/
//DMA_InitStructure.DMA_PeripheralBaseAddr =ADC1_DR_Address; /*定义内存基地址*/
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR; //DMA外设ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr=(u32)&ADC_ConvertedValue;
/*定义AD外设作为数据传输的来源*/
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 6;
/*设定寄存器地址固定*/
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
/*设定外设数据宽度*/
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
/*设定内存的的宽度*/
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
/*设定DMA工作再循环缓存模式*/
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
/*设定DMA选定的通道软件优先级*/
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* Enable DMA channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
/*设置ADC工作在独立模式*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
/*规定AD转换工作在扫描模式,即对多个通道采样*/
ADC_InitStructure.ADC_ScanConvMode = ENABLE ;
/*设定AD转化在连续模式*/
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
/*不使用外部促发转换*/
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
/*采集的数据在寄存器中以右对齐的方式存放*/
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
/*设定要转换的AD通道数目*/
ADC_InitStructure.ADC_NbrOfChannel = 6;
ADC_Init(ADC1, &ADC_InitStructure);//根据ADC_InitStruct中指定的参数初始化外设ADCx的寄存器
/*配置ADC时钟,为PCLK2的8分频,即9MHz*/
RCC_ADCCLKConfig(RCC_PCLK2_Div8);
/*配置ADC1的通道11为55.5个采样周期 */
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 3, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 4, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_4 ,5, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 6, ADC_SampleTime_55Cycles5);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/*复位校准寄存器 */
ADC_ResetCalibration(ADC1);
/*等待校准寄存器复位完成 */
while(ADC_GetResetCalibrationStatus(ADC1));
/* ADC校准 */
ADC_StartCalibration(ADC1);
/* 等待校准完成*/
while(ADC_GetCalibrationStatus(ADC1));
/* 由于没有采用外部触发,所以使用软件触发ADC转换 */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
u16 GetVdy(u16 advalue)
{
//return (u16)( ADCConvertedValue * 330 / 4096*1000);
return (u16)(ADC_ConvertedValue);
}
void G_shuchu(void)
{
printf(" ADC_ConvertedValue :%d\r\n", ADC_ConvertedValue);
printf(" ADC_ConvertedValue :%d\r\n", ADC_ConvertedValue);
printf(" ADC_ConvertedValue :%d\r\n", ADC_ConvertedValue);
printf(" ADC_ConvertedValue :%d\r\n", ADC_ConvertedValue);
printf(" ADC_ConvertedValue :%d\r\n", ADC_ConvertedValue);
printf(" ADC_ConvertedValue :%d\r\n", ADC_ConvertedValue);
printf(" ADC_GetConversionValue:%d\r\n", ADC_GetConversionValue(ADC1));
//printf(" ADC_ConvertedValue :%d\r\n", ADC_ConvertedValue);
}
问题基本找到,谢谢yCat的帖子,http://club.gizwits.com/forum.php?mod=viewthread&tid=3102&highlight=stm 楼主怎么解决的啊,没看懂
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