blink/blink.c


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#include "gpio.h"
#include "uart.h"

extern unsigned __bss_start__;
extern unsigned __bss_end__;

int notmain() {
    unsigned *bss = &__bss_start__;
    unsigned *bss_end = &__bss_end__;
    while (bss < bss_end) {
        *bss++ = 0;
    }

    uart_putc('h');
    uart_putc('i');
    uart_putc('\n');

    size_t pin = 12;
    gpio_set_function(pin, GPIO_GPIO);
    gpio_set_output(pin);
    gpio_set_on(pin);

    return 0;
}