GPIO API Reference
GPIO
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typedef void (*wm_drv_gpio_isr_t)(void *arg)
GPIO interrupt handler.
- Param arg:
User registered data
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wm_drv_gpio_fast_write(pin, value)
Fast write gpio with value 0 or 1, Please note that it is not thread safe.
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wm_device_t *wm_drv_gpio_init(char *dev_name)
Initialize gpio dev, and configure gpio based on the device tree.
- Parameters:
dev_name – [in] like “gpio”, if device tree set
- Returns:
device handle: device handle, used wm_device_t
NULL: failed
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int wm_drv_gpio_deinit(wm_device_t *dev)
Deinitialize gpio dev.
- Parameters:
dev – [in] use
wm_device_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_set_dir(wm_gpio_num_t pin, wm_gpio_dir_t dir)
Set gpio dir.
- Parameters:
pin – [in] use
wm_gpio_pin_num_t
dir – [in] use
wm_gpio_dir_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_set_pullmode(wm_gpio_num_t pin, wm_gpio_pupd_t pullmode)
Set gpio pullmode.
- Parameters:
pin – [in] use
wm_gpio_pin_num_t
pullmode – [in] use
wm_gpio_pupd_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_data_set(wm_gpio_num_t pin)
Write gpio with value 1.
Warning
You should use this API after calling wm_drv_gpio_init.
- Parameters:
pin – [in] use
wm_gpio_num_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_data_reset(wm_gpio_num_t pin)
Write gpio with value 0.
Warning
You should use this API after calling wm_drv_gpio_init.
- Parameters:
pin – [in] use
wm_gpio_num_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_data_get(wm_gpio_num_t pin)
Read gpio.
Warning
You should use this API after calling wm_drv_gpio_init.
- Parameters:
pin – [in] use
wm_gpio_num_t
- Returns:
gpio value: 1 or 0
others: failed
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int wm_drv_gpio_iomux_func_sel(wm_gpio_num_t pin, wm_gpio_pin_mux_t func)
Select iomux. please read wm_io_mux.h for pinmux cfg.
- Parameters:
pin – [in] use
wm_gpio_num_t
func – [in] use
wm_gpio_pin_mux_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_enable_isr(wm_gpio_num_t pin)
Enable gpio irq.
- Parameters:
pin – [in] use
wm_gpio_num_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_disable_isr(wm_gpio_num_t pin)
Disable gpio irq.
- Parameters:
pin – [in] use
wm_gpio_num_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_set_intr_mode(wm_gpio_num_t pin, wm_gpio_intr_mode_t mode)
Set gpio intr mode.
- Parameters:
pin – [in] use
wm_gpio_num_t
mode – [in] use
wm_gpio_intr_mode_t
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_add_isr_callback(wm_gpio_num_t gpio_num, wm_drv_gpio_isr_t isr_callback, void *args)
Add ISR handler for the corresponding GPIO pin.
Warning
You should use this API after calling wm_drv_gpio_init.
- Parameters:
gpio_num – GPIO number, If this pin is not set in the device tree, you need to initialize it separately
isr_callback – ISR handler function for the corresponding GPIO number.
args – parameter for ISR handler.
- Returns:
WM_ERR_SUCCESS: succeed
others: failed
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int wm_drv_gpio_remove_isr_callback(wm_gpio_num_t gpio_num)
Remove ISR handler for the corresponding GPIO pin.
Warning
You should use this API after calling wm_drv_gpio_init.
- Parameters:
gpio_num – GPIO number
- Returns:
WM_ERR_SUCCESS: succeed
others: failed