How to split a transmitted data to receive full data.

do this:
adc_value_h=value>>8;
adc_value_l=value&0xFF;
Gastón

Hi Gaston,

I think I have written the question wrong. I am sending 2 bytes out. However, I receive just 1 byte. How do I get the answer to be 2 bytes long. The SCIRXBUF can only read 8 bits. The relevant piece of code is as follows:

__interrupt void sciaTxFifoIsr(void)

{

Uint16 i;

Uint16 j;

for(i=0; i< 8; i++)

{

SciaRegs.SCITXBUF=sdataA[i]; // Send data

}

for(i=0; i< 8; i++){

for (j=0; j<48; j = j+2){ //Increment send data for next cycle

sdataA[i] = AdcBuf[j];

}

}

SciaRegs.SCIFFTX.bit.TXFFINTCLR=1; // Clear SCI Interrupt flag

PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ACK

}

__interrupt void sciaRxFifoIsr(void)

{

Uint16 i;

for(i=0; i<8; i++) {

rdataA[i]=SciaRegs.SCIRXBUF.all; // Read data

}

SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag

SciaRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag

PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ack

}

So my sdata[i] = 4095, however, rdata[i] = 255. How do I get rdata[i] to be 4095 too. I hope that clears up my problem. Also, my sdata[i] can be anything from 0 to 4095.

Thanks.

Waqqas 

usually the SCITXBUF is 1 bytes long. looking your code, let me ask you something:
1) How do you kow when the SCITXBUF is ready to receive another character?
Did you read the Sci.pdf of your device?
in this link you'll find examples code www.ti.com/.../controlsuite
regards
Gastón

Hi Gaston,
I am using the Loopback_interrupt example as a base code and including some extra lines from my side. I am assuming the fifo interrupts later in the code show that the SCITXBUF is ready for receiving another character.
Also, because, when I toggle the values from 0 to 10 into SCIB, I can see that the SCITXBUF and SCIRXBUF changing values based on different values in sdataB.
If SCITXBUF is 8 bits long, then is there a way for me to get a value from 0 to 4095 into it and be able to read that on SCIRXBUF in SCIA?

Thanks.
Waqqas

maybe you should try sending a simple character first and read the pdf to understand how the things works. How many bytes has sdataA? the i variable goes from 0 to 8? why? How many bytes has AdcBuf?
regards
Gastón

Hi Gaston,
I am reading up on the pdf once more. sdataA has 2 bytes, and the i variable goes from 0 to 8 for no particular reason. Just seeing how the numbers are coming in. AdcBuf has also 2 bytes.
As you said, I looked SCITXBUF and it is also 1 byte.
Is there a way to get 2 bytes in these registers to get the answer that I want.

Thanks.

Waqqas

if sdataA has 2 bytes, then why i goes from 0 to 8? wouldn't be 0 to 1? When you send a byte from the TX buffer, you have to wait until the buffer is ready to accept another byte.

for(i=0; i< 1; i++)

{

SciaRegs.SCITXBUF=sdataA[i]; // Send data
TX BUFFER EMPTY?--->>when this happens TX buffer will accept another byte

}

if you want to get to bytes, then do this:

adc_value_h=value>>8;
adc_value_l=value&0xFF;

you send this values to PC?
if adcBuf has 2 bytes, why j goes from 0 to 48?
Maybe you should first do some reading and check some example code to understand how this thing works.

Gastón