Ilgrim/FwLib_STC8
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feat: i2c support for 16-bit address

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This commit is contained in:
IOsetting 2022-07-03 18:00:23 +08:00
parent 8fe7f131c1
commit dd216a8117
2 changed files with 55 additions and 2 deletions
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6
include/fw_i2c.h
View File

@ -34,7 +34,7 @@ typedef enum
save the received bit to MSACKI（I2CMSST.1) */
I2C_MasterCmd_Recv = 0x04, // Recive data
I2C_MasterCmd_TxAck = 0x05, /* Send Ack. This command will generate 1 clock on SCL, and
write the value of MSACKO（I2CMSST.0） to SDA */
write the bit value of MSACKO（I2CMSST.0） to SDA */
I2C_MasterCmd_Stop = 0x06, // STOP. This command will send STOP signal, and reset MSBUSY flag
I2C_MasterCmd_StartSendRxAck = 0x09, // START + Send data + RxAck
I2C_MasterCmd_SendRxAck = 0x0A, // Send data + RxAck
@ -55,7 +55,7 @@ typedef enum
#define I2C_SetWorkMode(__MODE__) SFRX_ASSIGN(I2CCFG, 6, __MODE__)
/**
* I2C bus clock = SYSCLK / 2 / (__DIV__ * 2 + 4)
* I2C bus clock = FOSC / 2 / (__DIV__ * 2 + 4)
* __DIV__ values range [0, 63]
*/
#define I2C_SetClockPrescaler(__DIV__) do { \
@ -106,5 +106,7 @@ typedef enum
uint8_t I2C_Write(uint8_t devAddr, uint8_t memAddr, uint8_t *dat, uint16_t size);
uint8_t I2C_Read(uint8_t devAddr, uint8_t memAddr, uint8_t *buf, uint16_t size);
uint8_t I2C_Write16BitAddr(uint8_t devAddr, uint16_t memAddr, uint8_t *dat, uint16_t size);
uint8_t I2C_Read16BitAddr(uint8_t devAddr, uint16_t memAddr, uint8_t *buf, uint16_t size);
#endif

51
src/fw_i2c.c
View File

@ -61,3 +61,54 @@ uint8_t I2C_Read(uint8_t devAddr, uint8_t memAddr, uint8_t *buf, uint16_t size)
SFRX_OFF();
return HAL_OK;
}
uint8_t I2C_Write16BitAddr(uint8_t devAddr, uint16_t memAddr, uint8_t *dat, uint16_t size)
{
SFRX_ON();
I2C_MasterStart();
I2C_MasterSendData(devAddr & 0xFE);
I2C_MasterRxAck();
I2C_MasterSendData(memAddr >> 8);
I2C_MasterRxAck();
I2C_MasterSendData(memAddr & 0xFF);
I2C_MasterRxAck();
while(size--)
{
I2C_MasterSendData(*dat++);
I2C_MasterRxAck();
}
I2C_MasterStop();
SFRX_OFF();
return HAL_OK;
}
uint8_t I2C_Read16BitAddr(uint8_t devAddr, uint16_t memAddr, uint8_t *buf, uint16_t size)
{
SFRX_ON();
I2C_MasterStart();
I2C_MasterSendData(devAddr & 0xFE);
I2C_MasterRxAck();
I2C_MasterSendData(memAddr >> 8);
I2C_MasterRxAck();
I2C_MasterSendData(memAddr & 0xFF);
I2C_MasterRxAck();
I2C_MasterStart();
I2C_MasterSendData(devAddr | 0x01);
I2C_MasterRxAck();
while(size--)
{
I2C_SendMasterCmd(I2C_MasterCmd_Recv);
*buf++ = I2CRXD;
if (size == 0)
{
I2C_MasterNAck();
}
else
{
I2C_MasterAck();
}
}
I2C_MasterStop();
SFRX_OFF();
return HAL_OK;
}