I have a nRF51DK. And I would like to be able, to enable/disable the softdevice with 2 buttons.
Button 1 on nRF51DK --> Enable Softdevice
Button 2 on nRF51DK --> Disable Softdevice
Why Disable? Its not enough, if the Board is just invisible. Because I want to use faster timers (5-10us) and maybe Timer0.
There is a multiprotocol example in the sdk -->ble_app_gzll
My enabling and disabling of the softdevice is based on this example.
What is working? When I press on Button 1 the softdevice will be initialized and the board will be visible on the MCP. If I then press Button 2, the board isnt visible anymore and I can use the timer with 10us interval.
The problem is, when try to connect it will cause an error:
NRF_ERROR_INVALID_STATE (NRF_ERROR_BASE_NUM + 8)
Invalid state, operation disallowed in this state.
static void on_connect(ble_evt_t * p_ble_evt)
{
m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
m_current_conn_params = p_ble_evt->evt.gap_evt.params.connected.conn_params;
m_update_count = 0;
if (m_conn_params_config.start_on_notify_cccd_handle == BLE_GATT_HANDLE_INVALID)
{
conn_params_negotiation();
}
}
I will get into the conn_params_negotiation(); function, but I dont understand why.
When I hit the break point on the if query:
start_on_notify_cccd_handle = 0x0000
BLE_GATT_HANDLE_INVALID = 0x00000000
These values seems not be right for me. But they are the same on working program...
Here my initializaton of the softdevice after Button1 click:
void ble_stack_start(void)
{
bool erase_bonds;
uint32_t err_code;
SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, NULL);
// Enable BLE stack
ble_enable_params_t ble_enable_params;
memset(&ble_enable_params, 0, sizeof(ble_enable_params));
#ifdef S130
ble_enable_params.gatts_enable_params.attr_tab_size = BLE_GATTS_ATTR_TAB_SIZE_DEFAULT;
#endif
ble_enable_params.gatts_enable_params.service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT;
err_code = sd_ble_enable(&ble_enable_params);
APP_ERROR_CHECK(err_code);
err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
APP_ERROR_CHECK(err_code);
// Register with the SoftDevice handler module for BLE events.
err_code = softdevice_sys_evt_handler_set(sys_evt_dispatch);
APP_ERROR_CHECK(err_code);
//BLE_STACK_INIT
device_manager_init(erase_bonds);
gap_params_init();
advertising_init();
services_init();
conn_params_init();
application_timers_start();
err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
}
void ble_stack_stop(void)
{
uint32_t err_code;
err_code = softdevice_handler_sd_disable();
APP_ERROR_CHECK(err_code);
}
Maybe the initialization is not the problem. Because its the same as it is in the templates. Maybe I have to do more stuff in the ble_stack_stop function?
I hope you can help me
Here the error:
int main(void)
{
previous_mode = running_mode;
timers_init();
in_output_config();
gpiote_init();
// Enter main loop.
for (;;)
{
power_manage();
if (running_mode != previous_mode)
{
previous_mode = running_mode;
if (running_mode == 0)
{
//nrf_drv_gpiote_uninit();
// Disable the S110 stack.
ble_stack_stop();
timers_init();
start_timer();
}
else if (running_mode == 1)
{
stop_timer();
ble_stack_start();
timers_init();
}
}
}
}
Error reason:
In the main loop, timers_init will be called twice.
