Espressif ESP32-S2 - Page 274

Chapter 2. API Reference
GPIO_PULLUP_ENABLE = 0x1
Enable GPIO pull-up resistor
enum gpio_pulldown_t
Values:
GPIO_PULLDOWN_DISABLE = 0x0
Disable GPIO pull-down resistor
GPIO_PULLDOWN_ENABLE = 0x1
Enable GPIO pull-down resistor
enum gpio_pull_mode_t
Values:
GPIO_PULLUP_ONLY
Pad pull up
GPIO_PULLDOWN_ONLY
Pad pull down
GPIO_PULLUP_PULLDOWN
Pad pull up + pull down
GPIO_FLOATING
Pad floating
enum gpio_drive_cap_t
Values:
GPIO_DRIVE_CAP_0 = 0
Pad drive capability: weak
GPIO_DRIVE_CAP_1 = 1
Pad drive capability: stronger
GPIO_DRIVE_CAP_2 = 2
Pad drive capability: medium
GPIO_DRIVE_CAP_DEFAULT = 2
Pad drive capability: medium
GPIO_DRIVE_CAP_3 = 3
Pad drive capability: strongest
GPIO_DRIVE_CAP_MAX
API Reference - RTC GPIO
Header File
• components/driver/include/driver/rtc_io.h
Functions
static bool rtc_gpio_is_valid_gpio(gpio_num_t gpio_num)
Determine if the specified GPIO is a valid RTC GPIO.
Return true if GPIO is valid for RTC GPIO use. false otherwise.
Parameters
• gpio_num: GPIO number
static int rtc_io_number_get(gpio_num_t gpio_num)
Get RTC IO index number by gpio number.
Return >=0: Index of rtcio. -1 : The gpio is not rtcio.
Parameters
• gpio_num: GPIO number
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