GD32F450用I2C读写EEPROM代码移植
最近在学习GD32F450芯片的一些基本驱动功能。本文是基于《STM32库开发实战指南——基于野火挑战者开发板》，《GD32F4xx_User_Manual_CN_V2.2》，以及【GD32F4xx_Demo_Suites_V2.3.0】等相关资料进行代码移植的，相关资料网上都有。
单字节写入
/**
* @brief write one byte data to I2C EEPROM
* @param pBuffer: pointer of buffer
* @param WriteAddr: addr of EEPROM to be written
* @retval success return 1, failure return 0
*/
uint8_t I2C_EE_ByteWrite(uint8_t* pBuffer, uint8_t WriteAddr)
{
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until I2C bus is idle */
while(i2c_flag_get(I2C1, I2C_FLAG_I2CBSY))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* send a start condition to I2C bus */
i2c_start_on_bus(I2C1);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until SBSEND bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_SBSEND))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* send slave(EEPROM) address to I2C bus */
i2c_master_addressing(I2C1, EEPROM_ADDRESS_WRITE, I2C_TRANSMITTER);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until ADDSEND bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_ADDSEND))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* clear ADDSEND bit */
i2c_flag_clear(I2C1, I2C_FLAG_ADDSEND);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until the transmit data buffer is empty */
while(!i2c_flag_get(I2C1, I2C_FLAG_TBE))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* WriteAddr transmission */
i2c_data_transmit(I2C1, WriteAddr);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until the TBE bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_TBE))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* data transmission */
i2c_data_transmit(I2C1, *pBuffer);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until the TBE bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_TBE))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* send a stop condition to I2C bus */
i2c_stop_on_bus(I2C1);
while(I2C_CTL0(I2C1)&0x0200);
return 1;
}
多字节写入和页写入都是同样的逻辑
版权声明：本文为CSDN博主「rrrrrrrrrstart」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/qq_43438751/article/details/122225558
GD32F450用I2C读写EEPROM代码移植
最近在学习GD32F450芯片的一些基本驱动功能。本文是基于《STM32库开发实战指南——基于野火挑战者开发板》，《GD32F4xx_User_Manual_CN_V2.2》，以及【GD32F4xx_Demo_Suites_V2.3.0】等相关资料进行代码移植的，相关资料网上都有。
单字节写入
/**
* @brief write one byte data to I2C EEPROM
* @param pBuffer: pointer of buffer
* @param WriteAddr: addr of EEPROM to be written
* @retval success return 1, failure return 0
*/
uint8_t I2C_EE_ByteWrite(uint8_t* pBuffer, uint8_t WriteAddr)
{
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until I2C bus is idle */
while(i2c_flag_get(I2C1, I2C_FLAG_I2CBSY))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* send a start condition to I2C bus */
i2c_start_on_bus(I2C1);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until SBSEND bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_SBSEND))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* send slave(EEPROM) address to I2C bus */
i2c_master_addressing(I2C1, EEPROM_ADDRESS_WRITE, I2C_TRANSMITTER);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until ADDSEND bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_ADDSEND))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* clear ADDSEND bit */
i2c_flag_clear(I2C1, I2C_FLAG_ADDSEND);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until the transmit data buffer is empty */
while(!i2c_flag_get(I2C1, I2C_FLAG_TBE))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* WriteAddr transmission */
i2c_data_transmit(I2C1, WriteAddr);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until the TBE bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_TBE))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* data transmission */
i2c_data_transmit(I2C1, *pBuffer);
I2CTimeout = I2CT_FLAG_TIMEOUT;
/* wait until the TBE bit is set */
while(!i2c_flag_get(I2C1, I2C_FLAG_TBE))
{
if ((I2CTimeout--) == 0) return I2C_TIMEOUT_UserCallback(0);
}
/* send a stop condition to I2C bus */
i2c_stop_on_bus(I2C1);
while(I2C_CTL0(I2C1)&0x0200);
return 1;
}
多字节写入和页写入都是同样的逻辑
版权声明：本文为CSDN博主「rrrrrrrrrstart」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/qq_43438751/article/details/122225558
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