int main(int argc, char *argv[])
{
if (1 == argc) {
printf("Enter text as an argument.\n");
return 1;
}
if (!bcm2835_init()) {
printf("Unable to init bcm2835.\n");
return 2;
}
bcm2835_spi_begin();
bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); // The default
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0); // The default
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_256); // The default
bcm2835_gpio_fsel(Max7219_pinCS, BCM2835_GPIO_FSEL_OUTP);
bcm2835_gpio_write(disp1[0][0],HIGH);
Delay_xms(50);
Init_MAX7219();
size_t index = 0;
while (index < strlen(argv[1])) {
// Retrive first letter
char letter1 = toupper(argv[1][index]);
index++;
// Retrieve second letter
// If it does not exist use space
char letter2 = (index < strlen(argv[1])) ? toupper(argv[1][index]) : (char) 0;
led_print(find_char(letter1), find_char(letter2));
Delay_xms(1000);
index++;
}
// Clear screen
led_print(36, 36);
bcm2835_spi_end();
bcm2835_close();
return 0;
}
int main(int argc, char **argv)
{
int fd;
int ret;
fd = open("/dev/MAX7219", O_WRONLY);
if (fd < 0)
{
fprintf(stderr, "Fail to open /dev/MAX7219!\n");
exit(1);
}
char buff[1];
int i=0;
for(i=0;i<26;i++)
{
buff[0] = 'a' + i;
if((ret = write(fd, buff, 1))<0)
{
fprintf(stderr, "Fail to write /dev/MAX7219! %d\n", ret);
break;
}
Delay_xms(1000);
}
for(i=0;i<10;i++)
{
buff[0] = '0' + i;
if((ret = write(fd, buff, 1))<0)
{
fprintf(stderr, "Fail to write /dev/MAX7219! %d\n", ret);
break;
}
Delay_xms(1000);
}
fprintf(stdout, "Write /dev/MAX7219 successfully! %d\n", ret);
close(fd);
return 0;
}
