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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/usrp_e.h>
// Usage: usrp_e_spi w|rb slave data
int main(int argc, char *argv[])
{
int fp, slave, length, ret;
unsigned int data;
struct usrp_e_spi spi_dat;
if (argc < 5) {
printf("Usage: usrp_e_spi w|rb slave transfer_length data\n");
exit(-1);
}
slave = atoi(argv[2]);
length = atoi(argv[3]);
data = atoll(argv[4]);
printf("Data = %X\n", data);
fp = open("/dev/usrp_e0", O_RDWR);
printf("fp = %d\n", fp);
if (fp < 0) {
perror("Open failed");
return -1;
}
// sleep(1);
spi_dat.slave = slave;
spi_dat.data = data;
spi_dat.length = length;
spi_dat.flags = UE_SPI_PUSH_FALL | UE_SPI_LATCH_RISE;
if (*argv[1] == 'r') {
spi_dat.readback = 1;
ret = ioctl(fp, USRP_E_SPI, &spi_dat);
printf("Ioctl returns: %d, Data returned = %d\n", ret, spi_dat.data);
} else {
spi_dat.readback = 0;
ioctl(fp, USRP_E_SPI, &spi_dat);
}
return 0;
}
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