config =0x8000|(channel<< 12); /* 配置字节*/ SPI_I2S_SendData(AD7689_SPI, config);

这段代码是用于配置AD7689模块的SPI通信。首先，将`config`变量设置为一个16位的配置字节，其中高4位为0x8，低12位为`channel`的值左移12位。然后使用`SPI_I2S_SendData()`函数将配置字节发送给AD7689模块。

这段代码的作用是将配置字节发送给AD7689，告诉它要进行哪个通道的数据采集。AD7689是一个16位的模数转换器，可以通过SPI接口进行配置和数据传输。

注意，这段代码中使用了`AD7689_SPI`来表示SPI外设的句柄，你需要根据你的具体情况进行修改。

如果你还有其他问题，请随时提问！

相关问题

uint16_t config = 0x8000 | (channel << 12); // 配置字节 SPI_I2S_SendData(AD7689_SPI, config);

The code snippet you provided is used to send the configuration byte to the AD7689 ADC using the SPI interface. Let's break it down:

uint16_t config = 0x8000 | (channel << 12);  // Configuration byte
SPI_I2S_SendData(AD7689_SPI, config);

In this code, `config` is a 16-bit variable that will hold the configuration byte. The configuration byte has a specific format, where bits 15 to 13 are set to 1, and bits 12 to 0 are used for configuring the ADC's settings.

To set the configuration byte, we use the bitwise OR (`|`) operator to combine the value `0x8000` with the left-shifted value of `channel` by 12 bits. This ensures that bits 15 to 13 are set to 1, while bits 12 to 0 contain the desired channel information.

Once the configuration byte is set, it is sent to the AD7689 ADC using the `SPI_I2S_SendData` function. This function transfers the data via SPI from the microcontroller to the ADC.

Please note that in order for this code to work properly, you need to have properly configured the SPI interface and have access to the `AD7689_SPI` object or handle. Additionally, you may need to add delay or wait for the SPI transmission to complete before proceeding with further operations.

void AD7689_Read_Channel(uint8_t channel, uint16_t *data) { // 先将CS引脚置低，选中AD7689 GPIO_ResetBits(AD7689_CS_PORT, AD7689_CS_PIN); // 发送配置字节和通道字节 uint16_t config = 0x8000 | (channel << 12); // 配置字节 SPI_I2S_SendData(AD7689_SPI, config); }

The code snippet you provided is part of a function that reads data from the AD7689 ADC using SPI communication. Here's the continuation of the code:

void AD7689_Read_Channel(uint8_t channel, uint16_t *data)
{
    // Set the CS pin low to select AD7689
    GPIO_ResetBits(AD7689_CS_PORT, AD7689_CS_PIN);
    
    // Send configuration byte and channel byte
    uint16_t config = 0x8000 | (channel << 12);  // Configuration byte
    SPI_I2S_SendData(AD7689_SPI, config);
    
    // Wait until SPI transmission is complete
    while (SPI_I2S_GetFlagStatus(AD7689_SPI, SPI_I2S_FLAG_BSY) != RESET);
    
    // Receive the data from the ADC
    while (SPI_I2S_GetFlagStatus(AD7689_SPI, SPI_I2S_FLAG_RXNE) == RESET);
    *data = SPI_I2S_ReceiveData(AD7689_SPI);
    
    // Set the CS pin high to deselect AD7689
    GPIO_SetBits(AD7689_CS_PORT, AD7689_CS_PIN);
}

In this code, after configuring the `config` variable with the appropriate configuration and channel information, `SPI_I2S_SendData` is used to initiate the SPI transmission. The code then waits until the transmission is complete using `SPI_I2S_GetFlagStatus`.

After that, the received data from the ADC is obtained using `SPI_I2S_ReceiveData` and stored in the `data` variable. Finally, the CS pin is set high to deselect the AD7689 ADC.

Please note that this code assumes you have already configured the SPI interface and GPIO pins for the AD7689 ADC. Additionally, error handling and additional functionality may need to be added based on your specific requirements.