帮我写stm32和AD7622差分模拟输入采集电压信号ADC转化为16I/O口并行输出读取,循环读取258次并存储在一个数组里面打包通过DMA发送给上位机的代码,详细版库函数的可靠性分析
时间: 2024-06-11 15:05:58 浏览: 239
首先,需要了解STM32和AD7622的硬件连接方式和配置。AD7622是一款16位差分输入ADC芯片,可以通过SPI接口与STM32通信。我们需要配置STM32的SPI接口,以控制AD7622进行采样和转换。
接下来,我们需要使用STM32的ADC模块对采集到的电压信号进行转换。首先,需要配置ADC的参数,如采样频率、采样通道等。然后,我们可以使用DMA技术将转换结果存储在数组中,并将其发送给上位机。
以下是详细的代码实现:
1. 硬件连接和配置
我们需要将AD7622的SDI、SDO、SCLK、CS等引脚连接到STM32的相应引脚上。然后,我们需要配置STM32的SPI接口,以控制AD7622进行采样和转换。具体的配置方法可以参考STM32的HAL库函数手册。
2. ADC转换和DMA发送
首先,我们需要配置ADC的参数,如采样频率、采样通道等。然后,我们可以使用DMA技术将转换结果存储在数组中,并将其发送给上位机。以下是代码实现:
```
#include "stm32f4xx_hal.h"
#define ADC_CHANNELS_NUM 16
#define ADC_DMA_BUFFER_SIZE 258
ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
SPI_HandleTypeDef hspi1;
uint16_t adc_dma_buffer[ADC_DMA_BUFFER_SIZE];
void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig = {0};
/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ENABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = ADC_CHANNELS_NUM;
hadc1.Init.DMAContinuousRequests = ENABLE;
hadc1.Init.EOCSelection = ADC_EOC_SEQ_CONV;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
*/
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
// 配置DMA
hdma_adc1.Instance = DMA2_Stream0;
hdma_adc1.Init.Channel = DMA_CHANNEL_0;
hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc1.Init.Mode = DMA_CIRCULAR;
hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH;
hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(&hadc1, DMA_Handle, hdma_adc1);
HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);
}
void MX_SPI1_Init(void)
{
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 7;
if (HAL_SPI_Init(&hspi1) != HAL_OK)
{
Error_Handler();
}
}
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)
{
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_0);
}
void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if (hadc->Instance == ADC1)
{
/* Peripheral clock enable */
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**ADC1 GPIO Configuration
PC0 ------> ADC1_IN10
PC1 ------> ADC1_IN11
PC2 ------> ADC1_IN12
PC3 ------> ADC1_IN13
PC4 ------> ADC1_IN14
PC5 ------> ADC1_IN15
PB0 ------> ADC1_IN8
PB1 ------> ADC1_IN9
*/
GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* ADC1 DMA Init */
/* ADC1 Init */
hdma_adc1.Instance = DMA2_Stream0;
hdma_adc1.Init.Channel = DMA_CHANNEL_0;
hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc1.Init.Mode = DMA_CIRCULAR;
hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH;
hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hadc, DMA_Handle, hdma_adc1);
}
}
void HAL_ADC_MspDeInit(ADC_HandleTypeDef *hadc)
{
if (hadc->Instance == ADC1)
{
/* Peripheral clock disable */
__HAL_RCC_ADC1_CLK_DISABLE();
/**ADC1 GPIO Configuration
PC0 ------> ADC1_IN10
PC1 ------> ADC1_IN11
PC2 ------> ADC1_IN12
PC3 ------> ADC1_IN13
PC4 ------> ADC1_IN14
PC5 ------> ADC1_IN15
PB0 ------> ADC1_IN8
PB1 ------> ADC1_IN9
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5);
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_0 | GPIO_PIN_1);
/* ADC1 DMA DeInit */
HAL_DMA_DeInit(hadc->DMA_Handle);
}
}
void HAL_SPI_MspInit(SPI_HandleTypeDef *hspi)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if (hspi->Instance == SPI1)
{
/* Peripheral clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**SPI1 GPIO Configuration
PA5 ------> SPI1_SCK
PA6 ------> SPI1_MISO
PA7 ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
}
void HAL_SPI_MspDeInit(SPI_HandleTypeDef *hspi)
{
if (hspi->Instance == SPI1)
{
/* Peripheral clock disable */
__HAL_RCC_SPI1_CLK_DISABLE();
/**SPI1 GPIO Configuration
PA5 ------> SPI1_SCK
PA6 ------> SPI1_MISO
PA7 ------> SPI1_MOSI
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7);
}
}
void DMA2_Stream0_IRQHandler(void)
{
HAL_DMA_IRQHandler(&hdma_adc1);
}
int main(void)
{
HAL_Init();
MX_ADC1_Init();
MX_SPI1_Init();
HAL_ADC_Start_DMA(&hadc1, (uint32_t *)adc_dma_buffer, ADC_CHANNELS_NUM * ADC_DMA_BUFFER_SIZE);
while (1)
{
HAL_Delay(10);
}
}
```
以上是基本的代码实现,但是在实际项目中,需要考虑更多的情况,例如数据的校验和传输可靠性等。因此,我们需要对代码进行更加详细的测试和验证,以确保其可靠性和稳定性。
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