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feat(gpio): add function allowing switching input source from GPIO back to IOMUX

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This commit is contained in:
Michael (XIAO Xufeng) 2018-04-24 01:23:12 +08:00 committed by michael
parent bb1f3ae264
commit 1f085b1a3b
2 changed files with 33 additions and 4 deletions
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15
components/driver/gpio.c
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@ -546,4 +546,17 @@ esp_err_t gpio_hold_dis(gpio_num_t gpio_num)
r = ESP_ERR_NOT_SUPPORTED;
}
return r == ESP_OK ? ESP_OK : ESP_ERR_NOT_SUPPORTED;
}
}
void gpio_iomux_in(uint32_t gpio, uint32_t signal_idx)
{
GPIO.func_in_sel_cfg[signal_idx].sig_in_sel = 0;
PIN_INPUT_ENABLE(GPIO_PIN_MUX_REG[gpio]);
}
void gpio_iomux_out(uint8_t gpio_num, int func, bool oen_inv)
{
GPIO.func_out_sel_cfg[gpio_num].oen_sel = 0;
GPIO.func_out_sel_cfg[gpio_num].oen_inv_sel = oen_inv;
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], func);
}

22
components/driver/include/driver/gpio.h
View file

@ -31,11 +31,11 @@ extern "C" {
#define GPIO_SEL_0 (BIT(0)) /*!< Pin 0 selected */
#define GPIO_SEL_1 (BIT(1)) /*!< Pin 1 selected */
#define GPIO_SEL_2 (BIT(2)) /*!< Pin 2 selected
#define GPIO_SEL_2 (BIT(2)) /*!< Pin 2 selected
@note There are more macros
like that up to pin 39,
excluding pins 20, 24 and 28..31.
They are not shown here
They are not shown here
to reduce redundant information. */
/** @cond */
#define GPIO_SEL_3 (BIT(3)) /*!< Pin 3 selected */
@ -172,7 +172,7 @@ typedef enum {
GPIO_NUM_38 = 38, /*!< GPIO38, input mode only */
GPIO_NUM_39 = 39, /*!< GPIO39, input mode only */
GPIO_NUM_MAX = 40,
/** @endcond */
/** @endcond */
} gpio_num_t;
typedef enum {
@ -550,6 +550,22 @@ esp_err_t gpio_hold_en(gpio_num_t gpio_num);
*/
esp_err_t gpio_hold_dis(gpio_num_t gpio_num);
/**
* @brief Set pad input to a peripheral signal through the IOMUX.
* @param gpio_num GPIO number of the pad.
* @param signal_idx Peripheral signal id to input. One of the ``*_IN_IDX`` signals in ``soc/gpio_sig_map.h``.
*/
void gpio_iomux_in(uint32_t gpio_num, uint32_t signal_idx);
/**
* @brief Set peripheral output to an GPIO pad through the IOMUX.
* @param gpio_num gpio_num GPIO number of the pad.
* @param func The function number of the peripheral pin to output pin.
* One of the ``FUNC_X_*`` of specified pin (X) in ``soc/io_mux_reg.h``.
* @param oen_inv True if the output enable needs to be inversed, otherwise False.
*/
void gpio_iomux_out(uint8_t gpio_num, int func, bool oen_inv);
#ifdef __cplusplus
}
#endif