USART data into SPI - PIC18F4520 - c18

[prem0siva]

Hi,

I am using PIC18f4520 and Microchip mcc18 compiler.

I am able to write data into spi sucessfully using the library spi.h

WriteSPI(0xff); //the value is 1111 1111

How can I write a value which i have received from my USART ? I am able to receive as char. But how can i convert to hex? is conversion to hex is the only way to use my SPI?

I am using it to control a 2 channel 12bit DAC (LTC1448). I would like to use the library of c18.

I have been struggling for 4 weeks.

Thanks,
~Prem

 

[elrayes]

character have a hex value, they are interpreted inside the CPU to hex value not characters, I think if you took the value from the USART and send it to the SPI it will output it.
just read from the USART and store in an array (just for buffering) then send the data to SPI.

 

[prem0siva]

Thank you elrayes. I have given below the code I used.


#include <p18f4520.h>
#include <delays.h>
#include <spi.h>
#include <usart.h>

#pragma config WDT=OFF
#pragma config OSC=HS

void main(void)
{

unsigned int Data[3];

TRISB = 0b00000000; TRISA = 1;
TRISC = 0x00;
PORTBbits.RB0 = 1;

OpenUSART(USART_TX_INT_OFF & USART_RX_INT_OFF & USART_ASYNCH_MODE & USART_EIGHT_BIT & USART_CONT_RX & USART_BRGH_HIGH, 10);


while(1)
{

while(!DataRdyUSART());
getsUSART(Data,3);

PORTBbits.RB0 = 0;

OpenSPI(SPI_FOSC_64, MODE_01, SMPMID);

Delay10KTCYx(100);
WriteSPI(Data[0]);

Delay10KTCYx(100);
WriteSPI(Data[1]);

Delay10KTCYx(100);
WriteSPI(Data[2]);

CloseSPI();
PORTBbits.RB0 = 1;
Delay10KTCYx(100);

}
}

This is the code I am using. I think I am storing the recevied value from USART to an array Data[3]. But it is not working.

 

[elrayes]

try to re-build the source files of the API's your are using in your project, sometimes these problems isn't from the code but from compiler issues.