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Add PIC32MX GPIO handling; add button/LED support for the Sure PIC32MX

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4040 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2011-10-11 20:50:10 +00:00
parent 86b488777d
commit 1c15909faa
5 changed files with 358 additions and 6 deletions
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configs/sure-pic32mx/include/board.h
+54
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@@ -102,6 +102,24 @@
#define LED_SIGNAL 4 /* N/C N/C ON N/C N/C N/C OFF N/C */
#define LED_ASSERTION 4 /* N/C N/C ON N/C N/C N/C OFF N/C */
#define LED_PANIC 5 /* N/C N/C N/C ON N/C N/C N/C OFF */
#define LED_NVALUES 6
/* Button Definitions *******************************************************/
/* The Sure PIC32MX board has three buttons.
*
* SW1 (SW_UP, left arrow) RB3 Pulled high, Grounded/low when depressed
* SW2 (SW_DOWN, down/right arrow) RB2 Pulled high, Grounded/low when depressed
* SW3 (SW_OK, right arrow) RB4 Pulled high, Grounded/low when depressed
*/
#define BUTTON_SW1 0
#define BUTTON_SW2 1
#define BUTTON_SW3 2
#define NUM_BUTTONS 3
#define BUTTON_SW1_BIT (1 << BUTTON_SW1)
#define BUTTON_SW2_BIT (1 << BUTTON_SW2)
#define BUTTON_SW3_BIT (1 << BUTTON_SW3)
/****************************************************************************
* Public Types
@@ -124,6 +142,42 @@ extern "C" {
#define EXTERN extern
#endif
/****************************************************************************
* Button support.
*
* Description:
* up_buttoninit() must be called to initialize button resources. After
* that, up_buttons() may be called to collect the current state of all
* buttons or up_irqbutton() may be called to register button interrupt
* handlers.
*
* After up_buttoninit() has been called, up_buttons() may be called to
* collect the state of all buttons. up_buttons() returns an 8-bit bit set
* with each bit associated with a button. See the BUTTON_*_BIT
* definitions in board.h for the meaning of each bit.
*
* up_irqbutton() may be called to register an interrupt handler that will
* be called when a button is depressed or released. The ID value is a
* button enumeration value that uniquely identifies a button resource.
* See the BUTTON_* definitions in board.h for the meaning of enumeration
* value. The previous interrupt handler address is returned (so that it
* may restored, if so desired).
*
* When an interrupt occurs, it is due to a change on the GPIO input pin
* associated with the button. In that case, all attached change
* notification handlers will be called. Each handler must maintain state
* and determine if the unlying GPIO button input value changed.
*
****************************************************************************/
#ifdef CONFIG_ARCH_BUTTONS
EXTERN void up_buttoninit(void);
EXTERN uint8_t up_buttons(void);
#ifdef CONFIG_ARCH_IRQBUTTONS
EXTERN xcpt_t up_irqbutton(int id, xcpt_t irqhandler);
#endif
#endif
#undef EXTERN
#ifdef __cplusplus
}