tS8
i2cMyWrite(tU8 addr,
tU8 *pData,
tU16 len) {
tS8 retCode = 0;
tU8 i = 0;
do {
/* generate Start condition */
retCode = i2cStart();
if (retCode != I2C_CODE_OK)
break;
/* write address */
retCode = i2cWriteWithWait(addr);
if (retCode != I2C_CODE_OK)
break;
for (i = 0; i < len; i++) {
retCode = i2cWriteWithWait(*pData);
if (retCode != I2C_CODE_OK)
break;
pData++;
}
} while (0);
/* generate Stop condition */
i2cStop();
return retCode;
}
/******************************************************************************
*
* Description:
* Communicate with PCA9532
*
* Params:
* [in] pBuf - buffer of bytes to write
* [in] len - length of pBuf
* [in] pBuf2 - buffer for received data
* [in] len - length of pBuf2
*
* Returns:
* I2C status code
*
*****************************************************************************/
tS8 pca9532(tU8* pBuf, tU16 len, tU8* pBuf2, tU16 len2) {
tS8 retCode = 0;
tU8 status = 0;
tU16 i = 0;
do {
/* generate Start condition */
retCode = i2cStart();
if (I2C_CODE_OK != retCode) {
break;
}
/* write pca9532 address */
retCode = i2cWriteWithWait(0xc0);
if (I2C_CODE_OK != retCode) {
break;
}
/* write data */
for (i = 0; i < len; i++) {
retCode = i2cWriteWithWait(*pBuf);
if (I2C_CODE_OK != retCode) {
break;
}
pBuf++;
}
} while (0);
if (len2 > 0) {
/* Generate Start condition */
retCode = i2cRepeatStart();
/* Transmit device address */
if (I2C_CODE_OK == retCode) {
/* Write SLA+R */
retCode = i2cPutChar(0xc0 + 0x01);
while (I2C_CODE_BUSY == retCode) {
retCode = i2cPutChar(0xc0 + 0x01);
}
}
/* Wait until SLA+R transmitted */
while (1) {
/* Get new status */
status = i2cCheckStatus();
if (0x40 == status) {
/* Data transmitted and ACK received */
break;
} else if (0xf8 != status) {
/* error */
retCode = I2C_CODE_ERROR;
break;
}
}
if (I2C_CODE_OK == retCode) {
/* wait until address transmitted and receive data */
for (i = 1; i <= len2; i++) {
/* wait until data transmitted */
while (1) {
/* Get new status */
status = i2cCheckStatus();
if ((0x40 == status) || (0x48 == status) || (0x50 == status)) {
/* Data received */
if (i == len2) {
/* Set generate NACK */
retCode = i2cGetChar(I2C_MODE_ACK1, pBuf2);
} else {
retCode = i2cGetChar(I2C_MODE_ACK0, pBuf2);
}
/* Read data */
retCode = i2cGetChar(I2C_MODE_READ, pBuf2);
while (I2C_CODE_EMPTY == retCode) {
retCode = i2cGetChar(I2C_MODE_READ, pBuf2);
}
pBuf2++;
break;
} else if (0xf8 != status) {
/* ERROR */
i = len2;
retCode = I2C_CODE_ERROR;
break;
}
}
}
}
}
/* Generate Stop condition */
i2cStop();
return retCode;
}
