gd32从机向主机发送数据SPI,给个示例程序
时间: 2023-06-03 20:01:42 浏览: 142
以下是一个简单的示例程序,演示了如何使用GD32微控制器向主机发送SPI数据:
```
#include "gd32f10x.h"
#define SPI_CS_PIN GPIO_PIN_15 // SPI片选引脚
#define SPI_CS_GPIO GPIOB // SPI片选GPIO
#define SPI SPI1 // SPI接口
#define DATA_BUF_SIZE 10 // 数据缓冲区大小
uint8_t data_buf[DATA_BUF_SIZE] = {0x01, 0x02, 0x03, 0x04, 0x05,
0x06, 0x07, 0x08, 0x09, 0x0A};
// 初始化SPI接口
void spi_init(void) {
spi_parameter_struct spi_init_struct;
gpio_parameter_struct gpio_init_struct;
rcu_periph_clock_enable(RCU_GPIOB);
gpio_init_struct.mode = GPIO_MODE_OUTPUT_PP;
gpio_init_struct.pin = SPI_CS_PIN;
gpio_init_struct.speed = GPIO_OSPEED_50MHZ;
gpio_init(SPI_CS_GPIO, &gpio_init_struct);
rcu_periph_clock_enable(RCU_SPI1);
spi_init_struct.trans_mode = SPI_TRANSMODE_FULLDUPLEX;
spi_init_struct.device_mode = SPI_MASTER;
spi_init_struct.frame_size = SPI_FRAMESIZE_8BIT;
spi_init_struct.clock_polarity_phase = SPI_CK_PL_HIGH_PH_2EDGE;
spi_init_struct.nss = SPI_NSS_SOFT;
spi_init_struct.prescale = SPI_PSC_16;
spi_init_struct.endian = SPI_ENDIAN_MSB;
spi_init(SPI, &spi_init_struct);
spi_enable(SPI);
}
// 发送和接收数据
void spi_send_recv_data(uint8_t *send_data, uint8_t *recv_data, uint16_t size) {
int i;
gpio_bit_reset(SPI_CS_GPIO, SPI_CS_PIN);
for (i = 0; i < size; i++) {
while (spi_i2s_flag_get(SPI, SPI_FLAG_TBE) == RESET)
;
spi_i2s_data_transmit(SPI, send_data[i]);
while (spi_i2s_flag_get(SPI, SPI_FLAG_RBNE) == RESET)
;
recv_data[i] = spi_i2s_data_receive(SPI);
}
gpio_bit_set(SPI_CS_GPIO, SPI_CS_PIN);
}
int main(void) {
uint8_t recv_buf[DATA_BUF_SIZE] = {0};
spi_init();
spi_send_recv_data(data_buf, recv_buf, DATA_BUF_SIZE);
while (1)
;
}
```
注意:以上只是示例程序,需要根据具体情况进行修改和完善。