STM32WB55 TSC is not working

[Smalik]

In Group 1 G1_IO4 is a sampling capacitor and G1_IO3 is a sheild and in Group 2 G2_IO2 is sampling capacitor and G2_IO1 is input touch key. In Group 3 G3_IO4 is a sampling capacitor and G3_IO2 is a input touch key. so when i programmed with this configuration it detect touch from the shield not from the touch keys.

My touch key code is this

 if(MyTKeys[0].p_Data->StateId == TSL_STATEID_DEB_RELEASE_DETECT)

 {

 HAL_GPIO_WritePin(LED2_GPIO_Port,LED2_Pin,RESET);

 HAL_GPIO_WritePin(LED1_GPIO_Port,LED1_Pin,SET);

 }

 if(MyTKeysB[1].p_Data->StateId == TSL_STATEID_DEB_RELEASE_DETECT)

 {

HAL_GPIO_WritePin(LED2_GPIO_Port,LED2_Pin,SET);

 HAL_GPIO_WritePin(LED1_GPIO_Port,LED1_Pin,RESET);

 }

Please give me the solution why the touch detect from shield not form Touch keys.

[Smalik]

any solution please ????

[OlivierR]

See reply here. Active shield can not be used as a sensor. Active-shield increase sensor sensitivity and protect against noise.

https://community.st.com/s/question/0D53W000007Y5LfSAK/stm32wb55-tsc-is-not-working

Regards.

[KSzek.1]

Hello!

The example code is doing really well, if you just use 3 channel and 1 sampling.

****************

 MX_TOUCHSENSING_Init();

 /* USER CODE BEGIN 2 */

 tsl_user_Init();

 /* USER CODE END 2 */

 /* Infinite loop */

 /* USER CODE BEGIN WHILE */

 //start polling

HAL_TSC_Start(&htsc);

**************

tsl_status = tsl_user_Exec();

   if(tsl_status != TSL_USER_STATUS_BUSY)

   {

  Process_Sensors(tsl_status);

   }

**************

void Process_Sensors (tsl_user_status_t status)

{

 if (MyTKeys[0].p_Data->StateId == TSL_STATEID_DETECT)

  {

 HAL_GPIO_WritePin(LD1_GPIO_Port,LD1_Pin,GPIO_PIN_SET);

 }

 else

  {

 HAL_GPIO_WritePin(LD1_GPIO_Port,LD1_Pin,GPIO_PIN_RESET);

  }

 if (MyTKeys[1].p_Data->StateId == TSL_STATEID_DETECT)

  {

 HAL_GPIO_WritePin(LD3_GPIO_Port,LD3_Pin,GPIO_PIN_SET);

  }

 else

  {

 HAL_GPIO_WritePin(LD3_GPIO_Port,LD3_Pin,GPIO_PIN_RESET);

  }

 if (MyTKeys[2].p_Data->StateId == TSL_STATEID_DETECT)

  {

 HAL_GPIO_WritePin(LD2_GPIO_Port,LD2_Pin,GPIO_PIN_SET);

  }

 else

  {

 HAL_GPIO_WritePin(LD2_GPIO_Port,LD2_Pin,GPIO_PIN_RESET);

  }

}

****************************************

static void MX_GPIO_Init(void)

{

 GPIO_InitTypeDef GPIO_InitStruct = {0};

 /* GPIO Ports Clock Enable */

 __HAL_RCC_GPIOC_CLK_ENABLE();

 __HAL_RCC_GPIOB_CLK_ENABLE();

 __HAL_RCC_GPIOA_CLK_ENABLE();

 __HAL_RCC_GPIOD_CLK_ENABLE();

 /*Configure GPIO pin Output Level */

 HAL_GPIO_WritePin(GPIOB, LD2_Pin|LD3_Pin|LD1_Pin, GPIO_PIN_RESET);

 /*Configure GPIO pin : B1_Pin */

 GPIO_InitStruct.Pin = B1_Pin;

 GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);

 /*Configure GPIO pins : LD2_Pin LD3_Pin LD1_Pin */

 GPIO_InitStruct.Pin = LD2_Pin|LD3_Pin|LD1_Pin;

 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

 /*Configure GPIO pins : B2_Pin B3_Pin */

 GPIO_InitStruct.Pin = B2_Pin|B3_Pin;

 GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

}