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driver(gpio): Add api support digital pad hold function.

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This commit is contained in:
kooho 2018-04-03 22:09:30 +08:00
parent 2bfef060ba
commit ccf09c3b39
2 changed files with 94 additions and 0 deletions
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65
components/driver/gpio.c
View file

@ -482,3 +482,68 @@ esp_err_t gpio_get_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t* stren
}
return ESP_OK;
}
static const uint32_t GPIO_HOLD_MASK[34] = {
0,
GPIO_SEL_1,
0,
GPIO_SEL_0,
0,
GPIO_SEL_8,
GPIO_SEL_2,
GPIO_SEL_3,
GPIO_SEL_4,
GPIO_SEL_5,
GPIO_SEL_6,
GPIO_SEL_7,
0,
0,
0,
0,
GPIO_SEL_9,
GPIO_SEL_10,
GPIO_SEL_11,
GPIO_SEL_12,
0,
GPIO_SEL_14,
GPIO_SEL_15,
GPIO_SEL_16,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
};
esp_err_t gpio_hold_en(gpio_num_t gpio_num)
{
GPIO_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "Only output-capable GPIO support this function", ESP_ERR_NOT_SUPPORTED);
esp_err_t r = ESP_OK;
if (RTC_GPIO_IS_VALID_GPIO(gpio_num)) {
r = rtc_gpio_hold_en(gpio_num);
} else if (GPIO_HOLD_MASK[gpio_num]) {
SET_PERI_REG_MASK(RTC_IO_DIG_PAD_HOLD_REG, GPIO_HOLD_MASK[gpio_num]);
} else {
r = ESP_ERR_NOT_SUPPORTED;
}
return r == ESP_OK ? ESP_OK : ESP_ERR_NOT_SUPPORTED;
}
esp_err_t gpio_hold_dis(gpio_num_t gpio_num)
{
GPIO_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "Only output-capable GPIO support this function", ESP_ERR_NOT_SUPPORTED);
esp_err_t r = ESP_OK;
if (RTC_GPIO_IS_VALID_GPIO(gpio_num)) {
r = rtc_gpio_hold_dis(gpio_num);
} else if (GPIO_HOLD_MASK[gpio_num]) {
CLEAR_PERI_REG_MASK(RTC_IO_DIG_PAD_HOLD_REG, GPIO_HOLD_MASK[gpio_num]);
} else {
r = ESP_ERR_NOT_SUPPORTED;
}
return r == ESP_OK ? ESP_OK : ESP_ERR_NOT_SUPPORTED;
}

29
components/driver/include/driver/gpio.h
View file

@ -518,6 +518,35 @@ esp_err_t gpio_set_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t streng
*/
esp_err_t gpio_get_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t* strength);
/**
* @brief Set gpio pad hold function.
*
* The gpio pad hold function works in both input and output modes, but must be output-capable gpios.
* If pad hold enabled:
* in output mode: the output level of the pad will be force locked and can not be changed.
* in input mode: the input value read will not change, regardless the changes of input signal.
*
* Power down or call gpio_hold_dis will disable this function.
*
* @param gpio_num GPIO number, only support output-capable GPIOs
*
* @return
* - ESP_OK Success
* - ESP_ERR_NOT_SUPPORTED Not support pad hold function
*/
esp_err_t gpio_hold_en(gpio_num_t gpio_num);
/**
* @brief Unset gpio pad hold function.
*
* @param gpio_num GPIO number, only support output-capable GPIOs
*
* @return
* - ESP_OK Success
* - ESP_ERR_NOT_SUPPORTED Not support pad hold function
*/
esp_err_t gpio_hold_dis(gpio_num_t gpio_num);
#ifdef __cplusplus
}
#endif