Espressif ESP32-S2 Programming Manual page 426

Chapter 2. API Reference
TOUCH_HVOLT_ATTEN_1V5 = 0
Touch sensor high reference voltage attenuation, 1.5V attenuation
TOUCH_HVOLT_ATTEN_1V
Touch sensor high reference voltage attenuation, 1.0V attenuation
TOUCH_HVOLT_ATTEN_0V5
Touch sensor high reference voltage attenuation, 0.5V attenuation
TOUCH_HVOLT_ATTEN_0V
Touch sensor high reference voltage attenuation, 0V attenuation
TOUCH_HVOLT_ATTEN_MAX
enum touch_cnt_slope_t
Touch sensor charge/discharge speed
Values:
TOUCH_PAD_SLOPE_0 = 0
Touch sensor charge / discharge speed, always zero
TOUCH_PAD_SLOPE_1 = 1
Touch sensor charge / discharge speed, slowest
TOUCH_PAD_SLOPE_2 = 2
Touch sensor charge / discharge speed
TOUCH_PAD_SLOPE_3 = 3
Touch sensor charge / discharge speed
TOUCH_PAD_SLOPE_4 = 4
Touch sensor charge / discharge speed
TOUCH_PAD_SLOPE_5 = 5
Touch sensor charge / discharge speed
TOUCH_PAD_SLOPE_6 = 6
Touch sensor charge / discharge speed
TOUCH_PAD_SLOPE_7 = 7
Touch sensor charge / discharge speed, fast
TOUCH_PAD_SLOPE_MAX
enum touch_tie_opt_t
Touch sensor initial charge level
Values:
TOUCH_PAD_TIE_OPT_LOW = 0
Initial level of charging voltage, low level
TOUCH_PAD_TIE_OPT_HIGH = 1
Initial level of charging voltage, high level
TOUCH_PAD_TIE_OPT_MAX
enum touch_fsm_mode_t
Touch sensor FSM mode
Values:
TOUCH_FSM_MODE_TIMER = 0
To start touch FSM by timer
TOUCH_FSM_MODE_SW
To start touch FSM by software trigger
TOUCH_FSM_MODE_MAX
Espressif Systems 415
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