Hi,
i'm testing an application on nRF52, with nRF5_SDK_11.0.0-2.alpha and SoftDevice 132.
I took the ble_uart example and added a custom service with some characteristics with various permissions. Everything seems to work well, i then decided to add a timer for system tick tracking and i'm stuck in a hard fault i get when performing SD calls.
In main.c i defined a timer for system tick management
APP_TIMER_DEF(system_timer);
volatile uint32_t systemTick;
...
int main(int)
{
...
services_init();
...
err_code = app_timer_create(&system_timer, APP_TIMER_MODE_REPEATED , systemtimer_timeout_callback);
err_code = app_timer_start(system_timer, APP_TIMER_TICKS(1, 0), NULL);
...
for(;;){
}
}
void systemtimer_timeout_callback(void *p_context)
{
systemTick++;
return;
}
What happens it that, if i perform authorized read on my characteristic, the system crashes without recovering. For example if i do authorized read from nRF Master tool, the system enters BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST, but when i perform sd_ble_gatts_rw_authorize_reply, it doesn't exit from the function. If i debug and pause after that i can see
HardFault_Handler() at 0x24022
<signal handler called>() at 0xfffffff1
on_rwauth() at ble_myservice.c:575 0x21444
ble_myservice_on_ble_evt() at ble_myservice.c:672 0x21614
...
on the call stack.
If i comment timer section, everything works. Do you have any idea what could be the issue?
Thank you
EDIT 1:
This is a snippet of the function on_rwauth() i call inside BLE_GATT_RW_AUTHORIZE_REQUEST:
static void on_rwauth(ble_gate_t * p_gate, ble_evt_t * p_ble_evt){
uint8_t result;
uint8_t ledstate;
uint32_t err_code;
ble_gatts_rw_authorize_reply_params_t reply_params;
if (p_ble_evt->evt.gatts_evt.params.authorize_request.type == BLE_GATTS_AUTHORIZE_TYPE_READ){
//Authorized Read
if(p_ble_evt->evt.gatts_evt.params.authorize_request.request.read.handle == p_myservice->state_handle.value_handle){
SEGGER_RTT_WriteString(0, "READ AUTH IN\r\n");
//retrieve global state of myservice
result = p_myservice->mysrv_globalstate_handler(p_myservice);
if(result == INIT_STATE){
strncpy((char *)user_data, "HELLO", sizeof(user_data) -1);
}
else{
//return state of LED
ledstate = mysrv_ledstate_handler(p_myservice);
if(ledstate == LED_ON){
strncpy((char *)user_data, "ON", sizeof(user_data) -1);
}
else if(ledstate == LED_OFF){
strncpy((char *)user_data, "OFF", sizeof(user_data) -1);
}
}
memset(&reply_params, 0, sizeof(reply_params));
reply_params.type = BLE_GATTS_AUTHORIZE_TYPE_READ;
reply_params.params.read.p_data = (uint8_t *)&user_data[0];
reply_params.params.read.len = strlen((char *)user_data);
reply_params.params.read.offset = 0;
reply_params.params.read.update = 1;
SEGGER_RTT_WriteString(0, "ENTER SD_BLE_GATTS:....\r\n");
err_code = sd_ble_gatts_rw_authorize_reply(p_ble_evt->evt.gattc_evt.conn_handle, &reply_params);
APP_ERROR_CHECK(err_code);
SEGGER_RTT_WriteString(0, "READ AUTH OUT\r\n");
}
}
