GD32F450ZIT6双机spi通讯
时间: 2024-01-16 12:19:05 浏览: 131
GD32F450内部Flash
GD32F450ZIT6双机SPI通信的步骤如下:
1. 配置SPI主机和从机:
```c
// 主机配置
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init(SPI1, &SPI_InitStructure);
// 从机配置
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init(SPI2, &SPI_InitStructure);
```
2. 使能SPI主机和从机:
```c
SPI_Cmd(SPI1, ENABLE);
SPI_Cmd(SPI2, ENABLE);
```
3. 发送和接收数据:
```c
// 主机发送数据
SPI_I2S_SendData(SPI1, data);
// 从机接收数据
data = SPI_I2S_ReceiveData(SPI2);
```
4. 等待传输完成:
```c
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
```
5. 关闭SPI主机和从机:
```c
SPI_Cmd(SPI1, DISABLE);
SPI_Cmd(SPI2, DISABLE);
```
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