Hi,
I was checking out the forum and I read that its possible to start a timer from the handler of another timer. However it doesnt work for me. Im using S132 v2.0.0 Any ideas?
main.c
APP_TIMER_DEF(app_tmr_id);
int main(void)
{
NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos);
NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
NRF_CLOCK->TASKS_LFCLKSTART = 1;
while(NRF_CLOCK->EVENTS_LFCLKSTARTED == 0) { /* Do nothing */ }
APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
gsmCreateTimeoutTimer();
uint32_t err_code = app_timer_create(&app_tmr_id, APP_TIMER_MODE_REPEATED, gsmSendModon);
app_timer_start(app_tmr_id, APP_TIMER_TICKS(4000, APP_TIMER_PRESCALER), NULL);
while(1);
}
gsm.c
APP_TIMER_DEF(gsm_uart_timer_id);
bool gsmTimeout = false;
void gsmCreateTimeoutTimer(void)
{
app_timer_create(&gsm_uart_timer_id, APP_TIMER_MODE_SINGLE_SHOT, (app_timer_timeout_handler_t)gsmTimeoutSet);
}
void gsmSendModon(void)
{
app_timer_stop(gsm_uart_timer_id);
app_timer_start(gsm_uart_timer_id, APP_TIMER_TICKS(500, APP_TIMER_PRESCALER), NULL);
gsmUartPutString("$MODON\r");
while(!gsmTimeout);
}
void gsmTimeoutSet()
{
gsmTimeout=true;
}
void gsmUartPutString(const uint8_t * str)
{
uint_fast8_t i = 0;
uint8_t ch = str[i++];
while (ch != '\0')
{
while(app_uart_put(ch) != NRF_SUCCESS);
ch = str[i++];
}
}
So I create two timers app_tmr_id and gsm_uart_timer_id First one executes every 4 seconds and then in the handler I send a command via UART and create a timer to make sure that if I dont receive anything back I can process it correctly.
What happens is the following:
After 4sec gsmSendModon() gets executed, then I dont see any errors during app_timer_stop and app_timer_start for the second timer, however nothing appears on the UART. and also the second timers handler never fires up. If I remove second timer stop and start procedures and just leave gsmUartPutString("$MODON\r"); it fires up every 4 seconds without a problem.
