static void xmodem_next_packet() {
int len;
int i, sum = 0;
xmodem_buf[0] = 0x01;
xmodem_buf[1]++; // sequence number
xmodem_buf[2] = ~xmodem_buf[1]; // sequence number complement
len = fread(&xmodem_buf[3], 1, 0x80, xmodem_file);
if (len == 0) {
serial_byte_in(0x04);
fclose(xmodem_file);
xmodem_file = NULL;
return;
}
memset(&xmodem_buf[3 + len], 0x1A, 0x80 - len);
for (i = 3; i < 0x83; i++) sum += xmodem_buf[i];
xmodem_buf[0x83] = sum;
xmodem_buf_pos = 0;
xmodem_next_char();
}
void throttle_interval_event(int index)
{
event_repeat(index, 27000000 / 100);
/* Throttle interval (defined arbitrarily as 100Hz) - used for
* keeping the emulator speed down, and other miscellaneous stuff
* that needs to be done periodically */
static int intervals = 0, prev_intervals = 0;
intervals += 1;
usblink_timer();
usblink_queue_do();
int c = gui_getchar();
if(c != -1)
serial_byte_in((char) c);
gdbstub_recv();
rdebug_recv();
// Calculate speed
auto interval_end = std::chrono::high_resolution_clock::now();
static auto prev = interval_end;
static double speed = 1.0;
auto time = std::chrono::duration_cast<std::chrono::microseconds>(interval_end - prev).count();
if (time >= 500000) {
speed = (double)10000 * (intervals - prev_intervals) / time;
gui_show_speed(speed);
prev_intervals = intervals;
prev = interval_end;
}
gui_do_stuff(true);
if (!turbo_mode)
throttle_timer_wait();
}
static void xmodem_next_char() {
if (xmodem_file && xmodem_buf_pos < 0x84)
serial_byte_in(xmodem_buf[xmodem_buf_pos++]);
}
