Chibios and Event on Serial

[antoniolinux]

hi to all, i'm newbie of embedded word i have this problem write this thread in chibiOS
 

Code: [Select]


static THD_WORKING_AREA(waRead5, 128);
static THD_FUNCTION(Thread5,arg) {
  (void)arg;
  chRegSetThreadName("th_Buffer");
  palSetPadMode(GPIOA, 9, PAL_MODE_ALTERNATE(7));
  palSetPadMode(GPIOA, 10, PAL_MODE_ALTERNATE(7));
  sdStart(&SD1, NULL);
  event_listener_t Uart1Data;
  eventmask_t flags;
  chEvtRegisterMask((event_source_t *)chnGetEventSource(&SD1), &Uart1Data, EVENT_MASK(1));
  while (TRUE) {
       chEvtWaitAll(EVENT_MASK(1));
     
       flags =chEvtGetAndClearFlags(&Uart1Data);
   
       if (flags & CHN_INPUT_AVAILABLE)
                {
              sdWrite(&SD2,"OK\r\n",4);
                }
      }
}

i want start a event when arrived data on SD1, in this code when arrive data on SD1 i write ok on SD2
i have this strange situation if i press reset the board and later i press button i see  the event but later this i don't see nothing,
i use chEvtGetAndClearFlags for clear the flags but don't work
can you help me?


best  regards
A.

[ralphd]

Can't offer any help but it is interesting to see some sample ChibiOS code.  Seems overly complicated for basic IO.

[photovore]

You should post this in the CibiOS forum. The author, Giovanni, is very active there and can probably provide the most correct solution.

[Jeroen3]

There is no need to explicitly subscribe to an event of the serial io queue.
When you call sdRead you actually call

Code: [Select]

chIQReadTimeout(&(sdp)->iqueue, b, n, TIME_INFINITE)Which will wait indefinitely for data, there is also sdReadTimeout, which obviously only waits the specified timeout to allow the thread to read other events. Such as an request to kill itself.

Yes, it is complicated. Especially when you start to dissect the code and find the ingenious method used for inheritance in C.

[antoniolinux]

Hi to all, hanks for your feedback, i fix it with this code:
 

Code: [Select]

static THD_WORKING_AREA(waRead5, 128);
static THD_FUNCTION(Thread5,arg) {
  (void)arg;
  chRegSetThreadName("th_Riempio_Buffer");

  event_listener_t Uart1Data;
  eventmask_t activeEvents;
  eventflags_t flags;
  chEvtRegisterMask((event_source_t *)chnGetEventSource(&SD1), &Uart1Data, EVENT_MASK(1));
  while (TRUE) {
    activeEvents=chEvtWaitAll(EVENT_MASK(1));

       flags =chEvtGetAndClearFlags(&Uart1Data);

       if (flags)
                {
              sdWrite(&SD2,"OK\r\n",4);
                }
      }
  return 0;
}
i see the problem is the   

Code: [Select]

CHN_INPUT_AVAILABLEnoe i want to use the idea of Jeroen3
 

Code: [Select]

chIQReadTimeout(&(sdp)->iqueue, b, n, TIME_INFINITE)
i hope this post can help other people.
Best regards
A.