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101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/*
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* copyright (c) Espressif System 2010
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*
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*/
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#ifndef _GPIO_H_
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#define _GPIO_H_
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#define GPIO_PIN_ADDR(i) (GPIO_PIN0_ADDRESS + i*4)
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#define GPIO_ID_IS_PIN_REGISTER(reg_id) \
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((reg_id >= GPIO_ID_PIN0) && (reg_id <= GPIO_ID_PIN(GPIO_PIN_COUNT-1)))
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#define GPIO_REGID_TO_PINIDX(reg_id) ((reg_id) - GPIO_ID_PIN0)
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typedef enum {
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GPIO_PIN_INTR_DISABLE = 0,
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GPIO_PIN_INTR_POSEDGE = 1,
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GPIO_PIN_INTR_NEGEDGE = 2,
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GPIO_PIN_INTR_ANYEDGE = 3,
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GPIO_PIN_INTR_LOLEVEL = 4,
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GPIO_PIN_INTR_HILEVEL = 5
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} GPIO_INT_TYPE;
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#define GPIO_OUTPUT_SET(gpio_no, bit_value) \
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gpio_output_set(bit_value<<gpio_no, ((~bit_value)&0x01)<<gpio_no, 1<<gpio_no,0)
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#define GPIO_DIS_OUTPUT(gpio_no) gpio_output_set(0,0,0, 1<<gpio_no)
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#define GPIO_INPUT_GET(gpio_no) ((gpio_input_get()>>gpio_no)&BIT0)
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/* GPIO interrupt handler, registered through gpio_intr_handler_register */
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typedef void (* gpio_intr_handler_fn_t)(uint32 intr_mask, void *arg);
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/*
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* Initialize GPIO. This includes reading the GPIO Configuration DataSet
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* to initialize "output enables" and pin configurations for each gpio pin.
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* Must be called once during startup.
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*/
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void gpio_init(void);
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/*
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* Change GPIO pin output by setting, clearing, or disabling pins.
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* In general, it is expected that a bit will be set in at most one
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* of these masks. If a bit is clear in all masks, the output state
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* remains unchanged.
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*
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* There is no particular ordering guaranteed; so if the order of
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* writes is significant, calling code should divide a single call
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* into multiple calls.
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*/
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void gpio_output_set(uint32 set_mask,
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uint32 clear_mask,
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uint32 enable_mask,
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uint32 disable_mask);
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/*
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* Sample the value of GPIO input pins and returns a bitmask.
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*/
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uint32 gpio_input_get(void);
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/*
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* Set the specified GPIO register to the specified value.
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* This is a very general and powerful interface that is not
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* expected to be used during normal operation. It is intended
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* mainly for debug, or for unusual requirements.
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*/
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void gpio_register_set(uint32 reg_id, uint32 value);
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/* Get the current value of the specified GPIO register. */
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uint32 gpio_register_get(uint32 reg_id);
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/*
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* Register an application-specific interrupt handler for GPIO pin
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* interrupts. Once the interrupt handler is called, it will not
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* be called again until after a call to gpio_intr_ack. Any GPIO
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* interrupts that occur during the interim are masked.
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*
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* The application-specific handler is called with a mask of
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* pending GPIO interrupts. After processing pin interrupts, the
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* application-specific handler may wish to use gpio_intr_pending
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* to check for any additional pending interrupts before it returns.
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*/
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void gpio_intr_handler_register(gpio_intr_handler_fn_t fn, void *arg);
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/* Determine which GPIO interrupts are pending. */
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uint32 gpio_intr_pending(void);
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/*
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* Acknowledge GPIO interrupts.
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* Intended to be called from the gpio_intr_handler_fn.
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*/
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void gpio_intr_ack(uint32 ack_mask);
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void gpio_pin_wakeup_enable(uint32 i, GPIO_INT_TYPE intr_state);
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void gpio_pin_wakeup_disable();
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void gpio_pin_intr_state_set(uint32 i, GPIO_INT_TYPE intr_state);
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#endif // _GPIO_H_
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