GD32硬件I2C代码
时间: 2023-10-17 09:55:31 浏览: 62
你好!以下是一个简单的GD32硬件I2C的代码示例:
```c
#include "gd32f10x.h"
#include <stdio.h>
#define I2C0_SLAVE_ADDRESS7 0x82
void i2c_config(void)
{
/* Enable I2C0 clock */
rcu_periph_clock_enable(RCU_I2C0);
/* I2C0 GPIO ports */
gpio_init(GPIOB, GPIO_MODE_AF_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_6 | GPIO_PIN_7);
gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_6 | GPIO_PIN_7);
/* I2C0 parameter configuration */
i2c_clock_config(I2C0, 100000, I2C_DTCY_2);
i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, I2C0_SLAVE_ADDRESS7);
i2c_ack_config(I2C0, I2C_ACK_ENABLE);
i2c_enable(I2C0);
}
void i2c_write_data(uint8_t data)
{
/* Wait until I2C bus is idle */
while(i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
/* Send the byte to be written */
i2c_data_transmit(I2C0, data);
/* Wait until the transmission finishes */
while(!i2c_flag_get(I2C0, I2C_FLAG_I2CTC));
/* Clear the transmission flag */
i2c_flag_clear(I2C0, I2C_FLAG_I2CTC);
}
uint8_t i2c_read_data(void)
{
uint8_t data;
/* Wait until the I2C bus is idle */
while(i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
/* Enable I2C0 acknowledge */
i2c_ack_config(I2C0, I2C_ACK_ENABLE);
/* Enable I2C0 receive data */
i2c_receive_config(I2C0, I2C_RECEIVE_ENABLE);
/* Wait until the byte is received */
while(!i2c_flag_get(I2C0, I2C_FLAG_RBNE));
/* Read the received data */
data = i2c_data_receive(I2C0);
/* Clear the receive flag */
i2c_flag_clear(I2C0, I2C_FLAG_RBNE);
return data;
}
int main(void)
{
/* Configure I2C0 */
i2c_config();
/* Write data to the slave device */
i2c_write_data(0xAA);
/* Read data from the slave device */
uint8_t data = i2c_read_data();
/* Print the received data */
printf("Received data: 0x%02X\n", data);
while(1);
}
```
这段代码使用了GD32库函数来配置和操作GD32的I2C接口。它包括了初始化I2C接口、向从设备写入数据、从从设备读取数据,并通过串口打印接收到的数据。请注意,这只是一个简单的示例,实际使用中可能需要根据具体的硬件和应用进行适当的修改和调整。
希望对你有帮助!如有其他问题,请随时提问。