gd32F470spi配置
时间: 2023-08-18 09:10:20 浏览: 410
对于GD32F470系列微控制器的SPI配置,您可以按照以下步骤进行操作:
1. 打开SPI时钟:在RCC_AHB1ENR和RCC_APBxENR寄存器中使能SPI外设的时钟,其中AHB1ENR用于控制GPIO外设的时钟,APBxENR用于控制SPI外设的时钟。
2. 配置GPIO引脚:根据需要选择合适的引脚作为SPI的SCK、MISO和MOSI信号线,并将这些引脚配置为复用功能。可以使用GPIO_Init函数来配置引脚。
3. 配置SPI外设:使用SPI_Init函数来配置SPI外设的工作模式、数据位长度、时钟极性和相位等参数。您可以根据具体需求选择主模式或从模式,并设置数据传输的位长度、时钟极性和相位等参数。
4. 使能SPI外设:通过设置SPI_CTL0寄存器中的SPE位来使能SPI外设。
5. 发送和接收数据:使用SPI_SendData函数发送数据,并使用SPI_ReceiveData函数接收数据。您可以根据需要进行数据的发送和接收操作。
6. 关闭SPI外设:完成数据传输后,可以通过清除SPI_CTL0寄存器中的SPE位来关闭SPI外设。
以上是一个基本的SPI配置流程,具体的代码实现需要根据您的具体需求和硬件连接进行调整。请参考GD32F4xx固件库提供的相关函数和示例代码进行开发。
相关问题
GD32F470 SPI
The GD32F470 is a microcontroller chip manufactured by GigaDevice. It features a 32-bit ARM Cortex-M4 core and has a variety of peripherals, including SPI (Serial Peripheral Interface) communication.
SPI is a synchronous communication protocol that allows devices to exchange data over short distances. It uses a master-slave architecture, where a single master device initiates communication with one or more slave devices. The master device generates a clock signal that synchronizes data transmission between devices.
The GD32F470 has two SPI interfaces, each with a configurable data frame size and clock frequency. It also supports both full-duplex and half-duplex communication modes, as well as a variety of data transmission formats (e.g. SPI, TI, and Microwire).
To use the SPI interface on the GD32F470, you would typically configure the SPI pins and peripheral registers in your firmware code. You would then initiate communication by writing data to the SPI data register and reading data from the receive register. The SPI interface on the GD32F470 also has interrupt capabilities, allowing you to trigger interrupts when specific events occur (e.g. data transmission complete).
GD32F470 SPI接受
以下是GD32F470芯片的SPI接收代码示例:
1. 配置SPI外设和GPIO引脚:
```c
/* SPI参数配置结构体 */
spi_parameter_struct spi_init_struct;
/* GPIO参数配置结构体 */
gpio_parameter_struct gpio_init_struct;
/* 使能SPI0时钟和GPIOB时钟 */
rcu_periph_clock_enable(RCU_SPI0);
rcu_periph_clock_enable(RCU_GPIOB);
/* 配置SPI0复用引脚 */
gpio_init_struct.mode = GPIO_MODE_AF_PP;
gpio_init_struct.ospeed = GPIO_OSPEED_50MHZ;
gpio_init_struct.pull = GPIO_PULLUP;
gpio_init_struct.pin = GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
gpio_init(GPIOB, &gpio_init_struct);
/* SPI参数配置 */
spi_i2s_deinit(SPI0);
spi_struct_para_init(&spi_init_struct);
spi_init_struct.trans_mode = SPI_TRANSMODE_RECEIVEONLY;
spi_init_struct.device_mode = SPI_MASTER;
spi_init_struct.frame_size = SPI_FRAMESIZE_8BIT;
spi_init_struct.clock_polarity_phase = SPI_CK_PL_LOW_PH_1EDGE;
spi_init_struct.nss = SPI_NSS_SOFT;
spi_init_struct.prescale = SPI_PSC_16;
spi_init(SPI0, &spi_init_struct);
```
2. 从SPI接收数据:
```c
uint8_t data;
/* 等待SPI接收缓冲区非空 */
while (RESET == spi_i2s_flag_get(SPI0, SPI_FLAG_RBNE));
/* 读取SPI接收数据 */
data = spi_i2s_data_receive(SPI0);
```
在上述代码中,我们首先等待SPI接收缓冲区非空(即接收到数据),然后使用`spi_i2s_data_receive()`函数读取接收到的数据。注意,我们在SPI参数配置中设置了`SPI_TRANSMODE_RECEIVEONLY`模式,因此不需要同时发送数据。如果需要发送数据,请将该模式设置为`SPI_TRANSMODE_FULLDUPLEX`。
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