static int test_user_abort(void)
{
char c;
printf("Automatic boot in 2 seconds...\n");
printf("Q/ESC: abort boot\n");
printf("F7: boot from serial\n");
#ifdef MINIMAC_BASE
printf("F8: boot from network\n");
#endif
timer0_en_write(0);
timer0_reload_write(0);
timer0_load_write(identifier_frequency_read()*2);
timer0_en_write(1);
timer0_update_value_write(1);
while(timer0_value_read()) {
if(readchar_nonblock()) {
c = readchar();
if((c == 'Q')||(c == '\e')) {
puts("Aborted");
return 0;
}
if(c == 0x06) {
serialboot();
return 0;
}
#ifdef MINIMAC_BASE
if(c == 0x07) {
netboot();
return 0;
}
#endif
}
timer0_update_value_write(1);
}
static int check_ack(void)
{
int recognized;
static const char str[SFL_MAGIC_LEN] = SFL_MAGIC_ACK;
timer0_en_write(0);
timer0_reload_write(0);
timer0_load_write(identifier_frequency_read()/4);
timer0_en_write(1);
timer0_update_value_write(1);
recognized = 0;
while(timer0_value_read()) {
if(uart_read_nonblock()) {
char c;
c = uart_read();
if(c == str[recognized]) {
recognized++;
if(recognized == SFL_MAGIC_LEN)
return 1;
} else {
if(c == str[0])
recognized = 1;
else
recognized = 0;
}
}
timer0_update_value_write(1);
}
return 0;
}
void busywait_us(long long int us)
{
long long int threshold;
timer0_update_value_write(1);
threshold = timer0_value_read() - us*CONFIG_CLOCK_FREQUENCY/1000000LL;
while(timer0_value_read() > threshold)
timer0_update_value_write(1);
}
long long int clock_get_ms(void)
{
long long int clock_sys;
long long int clock_ms;
timer0_update_value_write(1);
clock_sys = 0x7fffffffffffffffLL - timer0_value_read();
clock_ms = clock_sys/(CONFIG_CLOCK_FREQUENCY/1000);
return clock_ms;
}
