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Add to standalone/sensor example to start/stop BT #644

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38 changes: 25 additions & 13 deletions pico_w/bt/standalone/server.c
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Original file line number Diff line number Diff line change
Expand Up @@ -40,15 +40,28 @@ static void heartbeat_handler(struct btstack_timer_source *ts) {
btstack_run_loop_add_timer(ts);
}

static volatile bool key_pressed;
void key_pressed_func(void *param) {
int key = getchar_timeout_us(0); // get any pending key press but don't wait
if (key == 's' || key == 'S') {
key_pressed = true;
}
}

int main() {
stdio_init_all();

restart:
// initialize CYW43 driver architecture (will enable BT if/because CYW43_ENABLE_BLUETOOTH == 1)
if (cyw43_arch_init()) {
printf("failed to initialise cyw43_arch\n");
return -1;
}

// Get notified if the user presses a key
printf("Press the \"S\" key to Stop bluetooth\n");
stdio_set_chars_available_callback(key_pressed_func, NULL);

// Initialise adc for the temp sensor
adc_init();
adc_select_input(ADC_CHANNEL_TEMPSENSOR);
Expand All @@ -74,20 +87,19 @@ int main() {
// turn on bluetooth!
hci_power_control(HCI_POWER_ON);

// btstack_run_loop_execute is only required when using the 'polling' method (e.g. using pico_cyw43_arch_poll library).
// This example uses the 'threadsafe background` method, where BT work is handled in a low priority IRQ, so it
// is fine to call bt_stack_run_loop_execute() but equally you can continue executing user code.

#if 0 // btstack_run_loop_execute() is not required, so lets not use it
btstack_run_loop_execute();
#else
// this core is free to do it's own stuff except when using 'polling' method (in which case you should use
// btstacK_run_loop_ methods to add work to the run loop.

// this is a forever loop in place of where user code would go.
while(true) {
key_pressed = false;
while(!key_pressed) {
async_context_poll(cyw43_arch_async_context());
async_context_wait_for_work_until(cyw43_arch_async_context(), at_the_end_of_time);
}

cyw43_arch_deinit();

printf("Press the \"S\" key to Start bluetooth\n");
key_pressed = false;
while(!key_pressed) {
sleep_ms(1000);
}
#endif
goto restart;
return 0;
}