STM32WB55 TSC is not working

Hello,

You can not get StateID from what we call Active-Shield. See AN5105.

Find below sw example matching your setup; 2 keys + active shield:

file stm32wbxx_it.c:

/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN TD */

extern int TSCidxGroup;

extern int TSCAcqDone;

/* USER CODE END TD */

void TSC_IRQHandler(void)

{

 /* USER CODE BEGIN TSC_IRQn 0 */

 /* USER CODE END TSC_IRQn 0 */

 HAL_TSC_IRQHandler(&htsc);

 /* USER CODE BEGIN TSC_IRQn 1 */

 TSL_acq_BankGetResult(TSCidxGroup, 0, 0);

 TSCidxGroup++;

 if (TSCidxGroup > TSLPRM_TOTAL_BANKS-1)

 {

  TSCidxGroup=0;

  // Start process to handle all results, we can do after each interrupt but... No.

  TSCAcqDone++;

 }else{

  // We restart bank acquisition only if we have mode than 1 bank (this is a choice....)

  TSL_acq_BankConfig(TSCidxGroup);

  TSL_acq_BankStartAcq_IT();

 }

 /* USER CODE END TSC_IRQn 1 */

}

file tsc.c:

void MX_TSC_Init(void)

{

 /** Configure the TSC peripheral 

 */

 htsc.Instance = TSC;

 htsc.Init.CTPulseHighLength = TSC_CTPH_16CYCLES;

 htsc.Init.CTPulseLowLength = TSC_CTPL_16CYCLES;

 htsc.Init.SpreadSpectrum = DISABLE;

 htsc.Init.SpreadSpectrumDeviation = 1;

 htsc.Init.SpreadSpectrumPrescaler = TSC_SS_PRESC_DIV1;

 htsc.Init.PulseGeneratorPrescaler = TSC_PG_PRESC_DIV4;

 htsc.Init.MaxCountValue = TSC_MCV_16383;

 htsc.Init.IODefaultMode = TSC_IODEF_OUT_PP_LOW;

 htsc.Init.SynchroPinPolarity = TSC_SYNC_POLARITY_FALLING;

 htsc.Init.AcquisitionMode = TSC_ACQ_MODE_NORMAL;

 htsc.Init.MaxCountInterrupt = DISABLE;

 htsc.Init.ChannelIOs = TSC_GROUP2_IO1|TSC_GROUP3_IO2;

 htsc.Init.ShieldIOs = TSC_GROUP1_IO3;

 htsc.Init.SamplingIOs = TSC_GROUP1_IO4|TSC_GROUP2_IO2|TSC_GROUP3_IO4;

 if (HAL_TSC_Init(&htsc) != HAL_OK)

 {

  Error_Handler();

 }

}

file main.c:

/* Includes ------------------------------------------------------------------*/

#include "main.h"

#include "touchsensing.h"

#include "tsc.h"

#include "gpio.h"

/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

#include "tsl.h"

#include "tsl_user.h"

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN PTD */

int TSCidxGroup=0;

int TSCAcqDone=0;

extern __IO TSL_tTick_ms_T ECSLastTick;

#define TKEY_DET(NB) (MyTKeys[(NB)].p_Data->StateId == TSL_STATEID_DETECT)

#define TKEY_PRX(NB) (MyTKeys[(NB)].p_Data->StateId == TSL_STATEID_PROX)

#define TKEY_REL(NB) (MyTKeys[(NB)].p_Data->StateId == TSL_STATEID_RELEASE)

#define TKEY_CAL(NB) (MyTKeys[(NB)].p_Data->StateId == TSL_STATEID_CALIB)

#define TKEY_MEAS(NB)  (MyTKeys[(NB)].p_ChD->Meas)

#define TKEY_STATEID(NB) (MyTKeys[(NB)].p_Data->StateId)

/* USER CODE END PTD */

....

int main(void)

{

 /* USER CODE BEGIN 1 */

 /* USER CODE END 1 */

 /* MCU Configuration--------------------------------------------------------*/

 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

 HAL_Init();

 /* USER CODE BEGIN Init */

 /* USER CODE END Init */

 /* Configure the system clock */

 SystemClock_Config();

 /* USER CODE BEGIN SysInit */

 /* USER CODE END SysInit */

 /* Initialize all configured peripherals */

 MX_GPIO_Init();

 MX_TSC_Init();

 MX_TOUCHSENSING_Init();

 /* USER CODE BEGIN 2 */

 TSCidxGroup=0;

 TSCAcqDone=0;

 TSL_acq_BankConfig(TSCidxGroup);

 TSL_acq_BankStartAcq_IT();

 __WFI();

 /* USER CODE END 2 */

 /* Infinite loop */

 /* USER CODE BEGIN WHILE */

 while (1)

 {

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

  if(TSCAcqDone != 0){

   TSCAcqDone = 0;

   TSL_obj_GroupProcess(&MyObjGroup);

   TSL_dxs_FirstObj(&MyObjGroup);

   if (TSL_tim_CheckDelay_ms(TSLPRM_ECS_DELAY, &ECSLastTick) == TSL_STATUS_OK)

   {

    TSL_ecs_Process(&MyObjGroup);

   }

// Get sensor status

  if(!TKEY_CAL(0) && !TKEY_CAL(1)){

   if(TKEY_DET(0))

   {

    HAL_GPIO_WritePin(LED1_GPIO_Port,LED1_Pin,SET);

   }else{

    HAL_GPIO_WritePin(LED1_GPIO_Port,LED1_Pin,RESET);

}

   if(TKEY_DET(1))

   {

    HAL_GPIO_WritePin(LED2_GPIO_Port,LED2_Pin,SET);

   }else{

    HAL_GPIO_WritePin(LED2_GPIO_Port,LED2_Pin,RESET);

}

   }

   TSCidxGroup = 0;

   TSCAcqDone = 0;

   TSL_acq_BankConfig(TSCidxGroup);

   TSL_acq_BankStartAcq_IT();

  }else{

   //__WFI();

   HAL_Delay(1); // Put HAL delay instead of __WFI() to follow measure activities using debuger

  }

 }

 /* USER CODE END 3 */

}