RBAPI(bool) i2cslave_Write(int dev, unsigned char val) {
unsigned long nowtime;
if (I2C_action[dev] != I2CACT_SLAVEWRITEREQ)
{
err_SetMsg(ERROR_I2CWRONGUSAGE, "slave must write data only when being requested");
return false;
}
i2cslave_ClearSlaveWREQ(dev);
i2c_WriteDataREG(dev, val);
for (nowtime=0; nowtime<100000L; nowtime++) //trick for performance; timer_nowtime() is time-consuming in some OS
if (i2c_CheckTXDone(dev) == true) goto TX_SUCCESS;
nowtime = timer_nowtime();
while ((i2c_CheckTXDone(dev) == false) && ((timer_nowtime() - nowtime) < I2C_TIMEOUT));
if (i2c_CheckTXDone(dev) == false)
{
err_SetMsg(ERROR_I2CFAIL, "the I2C module doesn't respond");
I2C_action[dev] = I2CACT_IDLE;
return false;
}
TX_SUCCESS:
i2c_ClearTXDone(dev);
I2C_action[dev] = I2CACT_SLAVE;
return true;
}
RBAPI(bool) i2cmaster_Write(int dev, unsigned char val) {
if (I2C_action[dev] != I2CACT_MASTERWRITE)
{
err_SetMsg(ERROR_I2CWRONGUSAGE, "must start a correct transaction before writing data");
return false;
}
i2c_WriteDataREG(dev, val);
if (check_TX_done(dev) == true) return true;
I2C_action[dev] = I2CACT_IDLE;
return false;
}
RBAPI(bool) i2cmaster_Write(int dev, unsigned char val) {
bool result;
if (I2C_action[dev] != I2CACT_MASTERWRITE)
{
err_SetMsg(ERROR_I2CWRONGUSAGE, "must start a correct transaction before writing data");
return false;
}
if (I2C_swMode[dev] != I2CSW_DISABLE)
result = i2csw_Write(dev, val);
else
{
i2c_WriteDataREG(dev, val);
result = check_TX_done(dev);
}
if (result == false) I2C_action[dev] = I2CACT_IDLE;
return result;
}