uint8_t I2C_Start(uint8_t dev_id, uint8_t dev_addr, uint8_t addr){
uint8_t s;
// First step, send start
s = I2C_Transmit(I2C_START);
if (s == TW_MT_ARB_LOST || (s != TW_START && s != TW_REP_START)){
printf("Error(Start): %x\r\n",s);
goto failure;
}
// Second step, set device id and device address
TWDR = (dev_id & 0xF0) | ((dev_addr << 1) & 0x0E) | TW_WRITE;
s = I2C_Transmit(I2C_DATA_ACK);
if (s == TW_MT_ARB_LOST || s != TW_MT_SLA_ACK || s == TW_MT_SLA_NACK){
printf("Error(Device Id/Address): %x\r\n",s);
goto failure;
}
// Third step, set memory address
TWDR = addr;
s = I2C_Transmit(I2C_DATA_ACK);
if (s != TW_MT_DATA_ACK){
printf("Error(EEPROM Address): %x\r\n",s);
goto failure;
}
return 0;
failure:return 1;
}
uint8_t I2C_Page_Write(uint8_t dev_id,
uint8_t dev_addr,
uint8_t addr, uint8_t * data, uint8_t size)
{
uint8_t ret = 0;
// First step, setup i2c and addresses
if(I2C_Start(dev_id,dev_addr,addr))
goto exit;
// Second step, write byte into memory
for(uint8_t i = 0;i < size;i++){
TWDR = data[i];
uint8_t s = I2C_Transmit(I2C_DATA_ACK);
if (s != TW_MT_DATA_ACK){
printf("Error(Data dispatch): %x\r\n",s);
break;
}
ret ++;
}
exit: I2C_Transmit(I2C_STOP);
return ret;
}
uint8_t I2C_Byte_Write(uint8_t dev_id,
uint8_t dev_addr,
uint8_t addr, uint8_t data)
{
uint8_t ret = 0;
// First step, setup i2c and addresses
if(I2C_Start(dev_id,dev_addr,addr))
goto exit;
// Second step, write byte into memory
TWDR = data;
uint8_t s = I2C_Transmit(I2C_DATA_ACK);
if (s != TW_MT_DATA_ACK){
printf("Error(Data dispatch): %x\r\n",s);
goto exit;
}
ret = 1;
exit: I2C_Transmit(I2C_STOP);
return ret;
}
uint8_t I2C_Sequencial_Read(uint8_t dev_id,
uint8_t dev_addr,
uint8_t addr, uint8_t * data, uint8_t size)
{
uint8_t ret = 0;
// First step, setup i2c and addresses (dummy write)
if(I2C_Start(dev_id,dev_addr,addr))
goto exit;
// Second step, start again
uint8_t s = I2C_Transmit(I2C_START);
if (s == TW_MT_ARB_LOST || (s != TW_START && s != TW_REP_START)){
printf("Error(Start again): %x\r\n",s);
goto exit;
}
// Third step, set device id and device address
TWDR = (dev_id & 0xF0) | ((dev_addr << 1) & 0x0E) | TW_READ;
s = I2C_Transmit(I2C_DATA_ACK);
if (s == TW_MR_ARB_LOST || s != TW_MR_SLA_ACK || s == TW_MR_SLA_NACK){
printf("Error(Device address 2): %x\r\n",s);
goto exit;
}
for(uint8_t i = 0;i < size;i++){
if(i == size - 1){
// Fifth step, read and finish with NACK
s = I2C_Transmit(I2C_DATA_NACK);
if (s != TW_MR_DATA_NACK){
printf("Error(Data reception NACK): %x\r\n",s);
break;
}
}else{
// Forth step, read data with ACK
s = I2C_Transmit(I2C_DATA_ACK);
if (s != TW_MR_DATA_ACK){
printf("Error(Data reception ACK): %x\r\n",s);
break;
}
}
data[i] = TWDR;
ret += 1;
}
exit: I2C_Transmit(I2C_STOP);
return ret;
}
uint32_t SUSI_API SusiI2CWriteReadCombine(
uint32_t Id,
uint8_t Addr,
uint8_t *pWBuffer,
uint32_t WriteLen,
uint8_t *pRBuffer,
uint32_t ReadLen
)
{
uint32_t ret;
if (Susi_CheckLibAvailable() != SUSI_STATUS_INITIALIZED)
return SUSI_STATUS_NOT_INITIALIZED;
if ((WriteLen > 0) && (pWBuffer == NULL))
return SUSI_STATUS_INVALID_PARAMETER;
if ((ReadLen > 0) && (pRBuffer == NULL))
return SUSI_STATUS_INVALID_PARAMETER;
if ((WriteLen == 0) && (ReadLen == 0))
return SUSI_STATUS_INVALID_PARAMETER;
ret = I2C_Transmit(Id,
Addr,
(uint8_t *)pWBuffer,
WriteLen,
(uint8_t *)pRBuffer,
ReadLen);
return ret;
}
uint8_t I2C_Random_Read(uint8_t dev_id,
uint8_t dev_addr,
uint8_t addr, uint8_t *data)
{
uint8_t ret = 0;
// First step, setup i2c and addresses (dummy write)
if(I2C_Start(dev_id,dev_addr,addr))
goto exit;
// Second step, start again
uint8_t s = I2C_Transmit(I2C_START);
if (s == TW_MT_ARB_LOST || (s != TW_START && s != TW_REP_START)){
printf("Error(Start again): %x\r\n",s);
goto exit;
}
// Third step, set device id and device address
TWDR = (dev_id & 0xF0) | ((dev_addr << 1) & 0x0E) | TW_READ;
s = I2C_Transmit(I2C_DATA_ACK);
if (s == TW_MR_ARB_LOST || s != TW_MR_SLA_ACK || s == TW_MR_SLA_NACK){
printf("Error(Device address 2): %x\r\n",s);
goto exit;
}
// Forth step, read data
s = I2C_Transmit(I2C_DATA_NACK);
if (s != TW_MR_DATA_NACK){
printf("Error(Data reception NACK): %x\r\n",s);
goto exit;
}
*data = TWDR;
ret = 1;
exit: I2C_Transmit(I2C_STOP);
return ret;
}
{
CmdLen = 1;
wBuf[0] = Cmd;
}
else if (SUSI_I2C_IS_STD_CMD(Cmd))
{
CmdLen = 2;
wBuf[0] = Cmd >> 8;
wBuf[1] = Cmd;
}
else
CmdLen = 0;
ret = I2C_Transmit(Id,
Addr,
wBuf,
CmdLen,
pBuffer,
ReadLen);
return ret;
}
uint32_t SUSI_API SusiI2CWriteTransfer(
uint32_t Id,
uint32_t Addr,
uint32_t Cmd,
uint8_t *pBuffer,
uint32_t BufLen
)
{
uint32_t ret;
