Hello,
TIVA microcontroller is Master and the Slave is connected by 1/2 meter RJ-25 cable.
TIVA reads continuously from the slave.
The Issue is that :
There is a considerable amount of delay of around 15 ms that is required to put in between 2 consecutive reads.
Is this amount of delay ok as per this IIC connection of master n slave ?
And if Delay in NOT put then, same value is read as in previous read operation by IIC read API.
Here is my code:
int buff[256] = 0;
ROM_I2CMasterEnable(I2C8_BASE);
ROM_I2CMasterInitExpClk(I2C8_BASE,SysCtlClockGet(),false); // IIC will use system clock for iic communication.
ROM_I2CMasterSlaveAddrSet(I2C8_BASE,0x30,true); // Master initiating a read from slave.
while( I2CMasterBusy(I2C8_BASE) );
ROM_I2CMasterControl(I2C8_BASE,I2C_MASTER_CMD_BURST_RECEIVE_START);
while( I2CMasterBusy(I2C8_BASE) );
onemillisecdelay(); // 7.5 ms delay
onemillisecdelay(); // 7.5 ms delay
buff[0] = ROM_I2CMasterDataGet(I2C8_BASE);
UARTprintf("\nThe buffer received is %x\n",buff[0]);
onemillisecdelay();
for(i = 1; i < 256 ;i++)
{
while( I2CMasterBusy(I2C8_BASE) );
onemillisecdelay(); // 7.5 ms delay
onemillisecdelay(); // 7.5 ms delay
ROM_I2CMasterControl(I2C8_BASE,I2C_MASTER_CMD_BURST_RECEIVE_CONT);
while( I2CMasterBusy(I2C8_BASE) );
if(I2C_MASTER_ERR_NONE == ROM_I2CMasterErr(I2C8_BASE) )
{
buff[i] = ROM_I2CMasterDataGet(I2C8_BASE);
}
else
buff[i] = -1;
}
while( I2CMasterBusy(I2C8_BASE) );
ROM_I2CMasterControl(I2C8_BASE, I2C_MASTER_CMD_BURST_RECEIVE_FINISH);
while( I2CMasterBusy(I2C8_BASE) );
buff[i] = ROM_I2CMasterDataGet(I2C8_BASE);
while(1)
{
//loop forever...
}
Please suggest .
Thanks,
Sanchit Mehra
