void bt_reset(void)
{
// Perform hardware reset. This function has some relatively long
// delays in it and so should probably only be called during application
// initialisation and termination. Calling it at other times may cause
// problems for other real time tasks.
// If power is currently off to the BC4 do not reset it!
if ((*AT91C_PIOA_ODSR & BT_RST_PIN) == 0) return;
//display_goto_xy(0, 1);
//display_string("BT Reset....");
//display_update();
//systick_wait_ms(10000);
// Ask for command mode
bt_clear_arm7_cmd();
// BC4 reset sequence. First take the reset line low for 100ms
bt_set_reset_low();
// Wait and discard any packets that may be around
int cnt = 100;
U8 *buf = out_buf[0];
while (cnt-- > 0)
{
bt_receive(buf);
systick_wait_ms(1);
}
bt_set_reset_high();
// Now wait either for 5000ms or for the BC4 chip to signal reset
// complete. Note we use the out buffer as a scratch area here
// this id safe since we are forcing a reset.
cnt = 5000;
while (cnt-- > 0)
{
bt_receive(buf);
// Look for the reset indication and the checksum
if ((buf[0] == 3) && (buf[1] == MSG_RESET_INDICATION) &&
(buf[2] == 0xff) && (buf[3] == 0xe9))
break;
systick_wait_ms(1);
}
// Force command mode
bt_clear_arm7_cmd();
//display_goto_xy(10, 1);
//display_int(cnt, 5);
//display_update();
//systick_wait_ms(10000);
}
static int
bt_rec_transfer(struct voss_backend *pbe, void *ptr, int len)
{
return (bt_receive(pbe->arg, ptr, len, 1));
}
