写一段基于32F103通过AD7689采集读取数据程序
时间: 2024-04-14 15:30:15 浏览: 14
好的!下面是一个基于STM32F103芯片通过AD7689进行数据采集和读取的程序示例:
首先,需要配置相应的引脚和SPI接口。假设我们使用SPI1进行通信,将PA5配置为SPI1的SCK引脚,将PA6配置为SPI1的MISO引脚,将PA7配置为SPI1的MOSI引脚,并将PB0配置为AD7689的CS引脚。以下是配置GPIO和SPI的代码:
```c
#include "stm32f10x.h"
void SPI1_Init(void) {
// Enable SPI1 clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
// Configure SPI1 pins
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; // SCK (PA5), MISO (PA6), MOSI (PA7)
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; // CS (PB0)
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// Configure SPI1 settings
SPI_InitTypeDef SPI_InitStructure;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
// Initialize SPI1
SPI_Init(SPI1, &SPI_InitStructure);
// Enable SPI1
SPI_Cmd(SPI1, ENABLE);
}
void AD7689_Select(void) {
GPIO_ResetBits(GPIOB, GPIO_Pin_0); // Set CS pin low
}
void AD7689_Deselect(void) {
GPIO_SetBits(GPIOB, GPIO_Pin_0); // Set CS pin high
}
```
接下来,我们可以编写一个函数来发送和接收数据,示例代码如下:
```c
uint16_t AD7689_ReadData(void) {
uint16_t data;
AD7689_Select(); // Select AD7689
// Send dummy data to initiate conversion and receive the result
SPI_I2S_SendData(SPI1, 0x0000);
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
data = SPI_I2S_ReceiveData(SPI1);
AD7689_Deselect(); // Deselect AD7689
return data;
}
```
最后,我们可以在主函数中使用这些函数进行数据采集和读取:
```c
int main(void) {
// Initialize SPI1
SPI1_Init();
while (1) {
// Read data from AD7689
uint16_t adcValue = AD7689_ReadData();
// Process the ADC value
// ...
// Delay or do other tasks
// ...
}
}
```
这是一个简单的基于STM32F103芯片通过AD7689进行数据采集和读取的程序示例。你可以根据自己的需求进行修改和扩展。希望对你有所帮助!如有其他问题,请随时提问。