36 lines
528 B
C
36 lines
528 B
C
#include "sys.h"
|
|
|
|
#define CYCLES_PER_MS 6666 // ish
|
|
|
|
void busy_sleep_1ms() {
|
|
for (int i = 0; i < CYCLES_PER_MS; ++i) {
|
|
// nothing
|
|
}
|
|
}
|
|
|
|
/** waits a general amount of time */
|
|
void busy_sleep(int ms) {
|
|
for (int i = 0; i < ms; ++i) {
|
|
busy_sleep_1ms();
|
|
}
|
|
}
|
|
|
|
int strlen(const char* str) {
|
|
int i = 0;
|
|
while(str[i] != '\0') {
|
|
i++;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
void log(const char* stuff) {
|
|
uart_writen(uart0, stuff, strlen(stuff));
|
|
}
|
|
|
|
int main() {
|
|
while(1) {
|
|
log("Hello, world!\r\n");
|
|
busy_sleep(1000);
|
|
}
|
|
}
|