How does TOUCH_PAD_SELX Map into the GPIO_SEL_X in esp-adf?
Posted: Tue May 15, 2018 6:37 am
Hi all
As esp-adf using a new framwork to develop, and Touch Peripheral init is like below :
refer to the esp32_lyrat broad HDK，those touch pad are connect to GPIO33，GPIO32,GPIO13，GPIO27
Why does it mapping like below？
TOUCH_PAD_SEL4 ========>GPIO33 ???????
TOUCH_PAD_SEL7 ========>GPIO32 ???????
TOUCH_PAD_SEL8 ========>GPIO13 ???????
TOUCH_PAD_SEL9 ========>GPIO27 ???????
and this make me confused how does TOUCH_PAD_SELX Map into the GPIO_SEL_X ？
if we using different Hardware design， how to config touch pad about TOUCH_PAD_SELX mapping？
BR！！
As esp-adf using a new framwork to develop, and Touch Peripheral init is like below :
Code: Select all
periph_touch_cfg_t touch_cfg = {
.touch_mask = TOUCH_PAD_SEL4 | TOUCH_PAD_SEL7 | TOUCH_PAD_SEL8 | TOUCH_PAD_SEL9,
.tap_threshold_percent = 70,
};
esp_periph_handle_t touch_periph = periph_touch_init(&touch_cfg);refer to the esp32_lyrat broad HDK，those touch pad are connect to GPIO33，GPIO32,GPIO13，GPIO27
Why does it mapping like below？
TOUCH_PAD_SEL4 ========>GPIO33 ???????
TOUCH_PAD_SEL7 ========>GPIO32 ???????
TOUCH_PAD_SEL8 ========>GPIO13 ???????
TOUCH_PAD_SEL9 ========>GPIO27 ???????
and this make me confused how does TOUCH_PAD_SELX Map into the GPIO_SEL_X ？
if we using different Hardware design， how to config touch pad about TOUCH_PAD_SELX mapping？
BR！！
