stm32l4 CubeMX touch sense

Posted on August 30, 2016 at 11:56

Hi,

I'm trying to figure out, how to use the CubeMX generated project for touch sense aplication. I'm able to detect the change on the 3 touch buttons, but i can't figure out, how to detect on which touch button did the change arrived.

The code:

static void MX_TSC_Init(void)

{

    /**Configure the TSC peripheral 

    */

  htsc.Instance = TSC;

  htsc.Init.CTPulseHighLength = TSC_CTPH_2CYCLES;

  htsc.Init.CTPulseLowLength = TSC_CTPL_2CYCLES;

  htsc.Init.SpreadSpectrum = DISABLE;

  htsc.Init.SpreadSpectrumDeviation = 0;

  htsc.Init.SpreadSpectrumPrescaler = TSC_SS_PRESC_DIV1;

  htsc.Init.PulseGeneratorPrescaler = TSC_PG_PRESC_DIV64;

  htsc.Init.MaxCountValue = TSC_MCV_255;

  htsc.Init.IODefaultMode = TSC_IODEF_OUT_PP_LOW;

  htsc.Init.SynchroPinPolarity = TSC_SYNC_POLARITY_FALLING;

  htsc.Init.AcquisitionMode = TSC_ACQ_MODE_NORMAL;

  htsc.Init.ChannelIOs = TSC_GROUP2_IO1|TSC_GROUP2_IO2|TSC_GROUP2_IO3;

  htsc.Init.SamplingIOs = TSC_GROUP2_IO4;

  if (HAL_TSC_Init(&htsc) != HAL_OK)

  {

    Error_Handler();

  }

}

//main

HAL_TSC_IODischarge(&htsc, ENABLE);

 if (HAL_TSC_Start(&htsc) != HAL_OK)

    {

      Error_Handler();

    }

while (1)

  {

    if (HAL_TSC_Start(&htsc) != HAL_OK)

    {

      Error_Handler();

    }

   while (HAL_TSC_GetState(&htsc) == HAL_TSC_STATE_BUSY)

    {}

 __HAL_TSC_CLEAR_FLAG(&htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));

if (HAL_TSC_GroupGetStatus(&htsc, TSC_GROUP2_IDX) == TSC_GROUP_COMPLETED)

    {

      // Store the acquisition value 

      uhTSCAcquisitionValue = HAL_TSC_GroupGetValue(&htsc, TSC_GROUP2_IDX);

    }

HAL_TSC_IODischarge(&htsc, ENABLE);

}

Thanks for any help.