TouchKey_begin disrupts functionality of pins not enabled for touch

[buttim]

I am using pins P1.0 and P1.1 for soft I2C in my code. As soon as I enabled touch sensing for pin 1.5 the I2C interface stopped working. I thoroughly examined the touch implementation and found that in many parts of the code all 6 touch channels are activated, even if not enabled. This stops the pins not enabled for touch from functioning normally as GPIO. I investigated the issue and found that adding a few lines of code seems to correct the problem. All changes affect file TouchKey.c In function TouchKey_ISR_Handler, from line 45, I changed

  index++;
  if (index > 6)
    index = 1;

to

    do {
      index++;
      if (index>6) index = 1;
    } while ((channelEnabled & (1<<(index-1)))==0);

In function TouchKey_begin, from line 96, I changed:

  for (uint8_t i = 0; i < 6; i++) {
    TKEY_CTRL = bTKC_2MS | (1 + i);
    while ((TKEY_CTRL & bTKC_IF) == 0)
      ;
    touchBaseline[i] = TKEY_DAT;
  }

  TKEY_CTRL = bTKC_2MS | 1;

to

    for (uint8_t i=0;i<6;i++){
      if (channelEnabled & (1<<i)){
        TKEY_CTRL = bTKC_2MS | (1+i);
        while((TKEY_CTRL&bTKC_IF) == 0);
        touchBaseline[i]=TKEY_DAT;
      }
    }

    for (uint8_t i=0;i<6;i++){
      if (channelEnabled & (1<<i)) {
    TKEY_CTRL = bTKC_2MS | (1+i);
    break;
      }
    }

[DeqingSun]

Thanks for the contribution. I'll check it throughly later.

[DeqingSun]

Thank you, the code looks good.

It has been added as https://github.com/DeqingSun/ch55xduino/commit/e66181f61a141df41fc80a3036040365ab39fa3f