cx32l003 keil5 i2c数据读写
时间: 2023-12-10 12:17:55 浏览: 218
对于CX32L003芯片的Keil5开发环境下的I2C数据读写操作,您可以按照以下步骤进行:
1. 配置I2C初始化参数,如I2C时钟频率、I2C总线地址、I2C工作模式等。
2. 配置I2C中断,使能I2C中断。
3. 在主函数中调用I2C数据读写函数,如I2C_SendData()和I2C_ReceiveData()。其中,I2C_SendData()函数用于向I2C从设备发送数据,I2C_ReceiveData()函数用于从I2C从设备接收数据。
参考代码如下:
```
#include "cx32l003.h"
#define I2C_ADDR 0xA0
void I2C_Init(void)
{
I2C_InitTypeDef I2C_InitStruct;
I2C_InitStruct.I2C_ClockSpeed = 100000;
I2C_InitStruct.I2C_Mode = I2C_Master;
I2C_InitStruct.I2C_OwnAddress = 0x00;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_Init(I2C0, &I2C_InitStruct);
I2C_ITConfig(I2C0, I2C_IT_RXI | I2C_IT_TXI | I2C_IT_STOPI | I2C_IT_NACKI | I2C_IT_ERRI, ENABLE);
I2C_Cmd(I2C0, ENABLE);
}
void I2C_SendData(uint8_t* buf, uint16_t len)
{
uint16_t i;
I2C_GenerateSTART(I2C0, ENABLE);
while(!I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C0, I2C_ADDR, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
for(i = 0; i < len; i++)
{
I2C_SendData(I2C0, buf[i]);
while(!I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
I2C_GenerateSTOP(I2C0, ENABLE);
}
void I2C_ReceiveData(uint8_t* buf, uint16_t len)
{
uint16_t i;
I2C_GenerateSTART(I2C0, ENABLE);
while(!I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C0, I2C_ADDR, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
for(i = 0; i < len; i++)
{
while(!I2C_CheckEvent(I2C0, I2C_EVENT_MASTER_BYTE_RECEIVED));
buf[i] = I2C_ReceiveData(I2C0);
}
I2C_GenerateSTOP(I2C0, ENABLE);
}
int main(void)
{
uint8_t tx_buf[2] = {0x00, 0x01};
uint8_t rx_buf[2];
I2C_Init();
I2C_SendData(tx_buf, 2);
I2C_ReceiveData(rx_buf, 2);
while(1);
}
```
上述代码中,I2C_Init()函数用于初始化I2C总线,I2C_SendData()函数用于向I2C从设备发送数据,I2C_ReceiveData()函数用于从I2C从设备接收数据。在主函数中,我们先发送两个字节的数据,然后再接收两个字节的数据,最后进入死循环等待。
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