hi !
i am new to keil ...
currenly , i am working on p89v51 to enable the spi mode and use it with sd card...
my problem is i cant get output on port 1 pins (ss,mosi,miso,sck)
#include <stdio.h>
#include <p89v51rd2.h>
void spi_init()
{
P1 = 0xBF; // defines i/o pins
SS = 1; // sets the chip select pin high
SPCFG = 0x00; // clears spi flag
SPCTL = 0x5B; // selecting master mode and other configurations
}
void main()
{
spi_init(); // spi mode initialization
while(1)
{
SS = 0;
SPDAT = 0xAA; // sends AAh to slave device
while (!(SPCFG & 0x80));
SPCFG =0x00;
SS = 1;
}
}
i have looked to port1 in analysis windows but nothing comes up?
any kind of help would be appreciated.......