What does 'undefined reference ' mean in Truestudio

[melt brink]

Posted on June 14, 2018 at 12:42

Im adding to touch to STM32f746 Disco. Using STCubeMx and STemwin + Guibuilder.  When trying to add touch I add the following two include files to main.h

&sharpinclude 'stm32746g_discovery.h'

&sharpinclude 'stm32746g_discovery_ts.h'

when I compile I two errors pop up :

         undefined reference to 'BSP_TS_GetState'

         undefined reference to BSP_TS_Init'

These are referenced in the stm32f746_discovery_ts.h  can someone tell me what these errors mean.

they are used in functions below from main.c (highlighted in bold)

void TouchTimer_Init()

{

BSP_TS_Init(480,272); // initialize touch screen if (HAL_TIM_Base_Init(&htim3) != HAL_OK ) {while (1);} // start timers if (HAL_TIM_Base_Start_IT(&htim3) != HAL_OK ) {while (1);}}

and

void BSP_Pointer_Update(void)

{ GUI_PID_STATE TS_State; // structure that reports touch state static TS_StateTypeDef prev_state; // previous touch state from touch sensor TS_StateTypeDef ts; // actual touch state from the sensor from BSP package uint16_t xDiff, yDiff; // difference in positions BSP_TS_GetState(&ts); // read the touch state from sensor BSP API TS_State.Pressed = ts.touchDetected; // Store the pressed state to Stemwin

xDiff = (prev_state.touchX[0] > ts.touchX) ? (prev_state.touchX[0] - ts.touchX[0]) : (ts.touchX[0] - prev_state.touchX[0]);

yDiff = (prev_state.touchY[0] > ts.touchY) ? (prev_state.touchY[0] - ts.touchY[0]) : (ts.touchY[0] - prev_state.touchY[0]);

if((prev_state.touchDetected = ts.touchDetected )|| (xDiff > 3 )||(yDiff > 3))

{

prev_state.touchDetected = ts.touchDetected;

if((ts.touchX[0] != 0) && (ts.touchY[0] != 0))

{ prev_state.touchX[0] = ts.touchX[0]; prev_state.touchY[0]= ts.touchY[0]; } TS_State.Layer = 0; TS_State.x = prev_state.touchX[0]; TS_State.y = prev_state.touchY[0]; //send touch state to stemnwin GUI_TOUCH_StoreStateEx(&TS_State);

}

}#undefined-reference #stm32f746-discovery #touch

[Tesla DeLorean · Accepted solution]

Posted on June 14, 2018 at 13:26

Compile errors or link errors?

You would need to make sure your project contains stm32746g_discovery_ts.c so the body code is present.

Also that has dependencies on  stm32746g_discovery_lcd.c and  ft5336.c

Other components must be enabled via stm32f7xx_hal_conf.h in your project directory.

[melt brink]

Posted on June 14, 2018 at 18:11

thanks Clive, yes linking.

I have created BSP directory and added stm32746g_discovery_ts.c as well as stm32746g_dicovery_lcd.c and the touch driver ft5336.c.

and can now debug.

My main aim here is to have a bare metal IOC file with touch functionality, STEMwin and guibuilder  all in order for me to add and remove perhipherals in Cubemx and then code applications from there.

[Amel NASRI]

Posted on July 13, 2018 at 14:31

Hi

brink.melt.001

,

My main aim here is to have a bare metal IOC file with touch functionality, STEMwin and guibuilder all in order for me to add and remove perhipherals in Cubemx and then code applications from there.

I think that

 will answer your request.

-Amel