Static C functions called from a thread in azrtos

[matt-crc]

Hello,

I'm using AzRTOS with threadX and FileX.  I have a thread with msg_queue that monitors the SD_Detect pin.  The code works properly, I detect the card insertion/removal process.  The problem is I need to re-initialize the SDMCC hardware so it can read the parameters off the SD card before I can mount the media.  I tried calling MX_SDMMC1_SD_Init() which is defined in the main.c file, but the compiler says MX_SDMMC1_SD_Init is an undefined reference.

app_filex.c  has an  include "main.h" at the beginning.

in "main.h" I defined the routine:

/* USER CODE BEGIN EFP */
void GetDateTime(void);
static void MX_SDMMC1_SD_Init(void);
/* USER CODE END EFP */

in app_filex.c:

			/* check if we received the correct event message */
			syslog(SYSLOG_NOTIF, "SD Card received queued event");
			if (r_msg == CARD_STATUS_CHANGED) {
				r_msg = 0;										/* reset the status */

				/* for debouncing purpose we wait a bit till it settles down */
				tx_thread_sleep(TX_TIMER_TICKS_PER_SECOND / 1);

				if (SD_IsDetected(FX_STM32_SD_INSTANCE) == HAL_OK) {
					/* We have a valid SD insertion event, start processing.. */
					syslog(SYSLOG_NOTIF, "SD Card Inserted");
					last_status = CARD_STATUS_CONNECTED;		/* Update last known status */
					MX_SDMMC1_SD_Init();						/* re-initialize SD card - get params from card */

					if (media_status == MEDIA_CLOSED) {
						sd_status = fx_media_open(&sdio_disk, FX_SD_VOLUME_NAME,
								fx_stm32_sd_driver, (VOID *)FX_NULL,
								(VOID *) fx_sd_media_memory, sizeof(fx_sd_media_memory));
						if (sd_status != FX_SUCCESS) {			/* Check the media open sd_status */
							syslog(SYSLOG_CRITICAL,"SD Card Unable to open media [0x04x]", sd_status);

							//Error_Handler();					/* Create error, call error handler.  */
						}
						media_status = MEDIA_OPENED;
					}

					break;
				} else {
					syslog(SYSLOG_NOTIF,"SD Card Removed\r\n");
					last_status = CARD_STATUS_DISCONNECTED; 	/* Update last known status */
					media_status = MEDIA_CLOSED;				/* force media closed */
				}
			} else {
				syslog(SYSLOG_CRITICAL,"SD Card unknown event received [0x08lx]", r_msg);
			}

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There is something I'm not understanding with static routines.  Can they be called from Threads?  Why isn't the compiler finding this routine?

thanks

Matthew

[matt-crc · Accepted solution]

The static function limits the scope of the function.  Since this static function is auto generated by CubeMX, i had to create a separate function.

void SD_Init() {
	MX_SDMMC1_SD_Init();
}

not an elegant solution, but it works with CubeMX code.

[Andrew Neil]

You shouldn't have to do that.

Try using the option to have CubeMX generate the initialisation functions in separate files:

That way, the initialisation functions will not be static.

Note that there's also an option to have CubeMX not generate a call to the initialisation function - so that you can call it yourself wherever & whenever you like:

PS:

There's also an option to make the functions static or not:

(this seems to be ignored when generating separate files)