51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
|
#ifndef RPI_H_
|
||
|
|
#define RPI_H_
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
/* gpio modes. */
|
||
|
|
#define PI_INPUT 0
|
||
|
|
#define PI_OUTPUT 1
|
||
|
|
#define PI_ALT0 4
|
||
|
|
#define PI_ALT1 5
|
||
|
|
#define PI_ALT2 6
|
||
|
|
#define PI_ALT3 7
|
||
|
|
#define PI_ALT4 3
|
||
|
|
#define PI_ALT5 2
|
||
|
|
|
||
|
|
void gpioSetMode(unsigned gpio, unsigned mode);
|
||
|
|
int gpioGetMode(unsigned gpio);
|
||
|
|
|
||
|
|
/* Values for pull-ups/downs off, pull-down and pull-up. */
|
||
|
|
#define PI_PUD_OFF 0
|
||
|
|
#define PI_PUD_DOWN 1
|
||
|
|
#define PI_PUD_UP 2
|
||
|
|
void gpioSetPullUpDown(unsigned gpio, unsigned pud);
|
||
|
|
|
||
|
|
int gpioRead(unsigned gpio);
|
||
|
|
void gpioWrite(unsigned gpio, unsigned level);
|
||
|
|
void gpioTrigger(unsigned gpio, unsigned pulseLen, unsigned level);
|
||
|
|
|
||
|
|
/* Bit (1<<x) will be set if gpio x is high. */
|
||
|
|
uint32_t gpioReadBank1(void);
|
||
|
|
uint32_t gpioReadBank2(void);
|
||
|
|
|
||
|
|
/* To clear gpio x bit or in (1<<x). */
|
||
|
|
void gpioClearBank1(uint32_t bits);
|
||
|
|
void gpioClearBank2(uint32_t bits);
|
||
|
|
|
||
|
|
/* To set gpio x bit or in (1<<x). */
|
||
|
|
void gpioSetBank1(uint32_t bits);
|
||
|
|
void gpioSetBank2(uint32_t bits);
|
||
|
|
|
||
|
|
unsigned gpioHardwareRevision(void);
|
||
|
|
|
||
|
|
/* Returns the number of microseconds after system boot. Wraps around
|
||
|
|
after 1 hour 11 minutes 35 seconds.
|
||
|
|
*/
|
||
|
|
uint32_t gpioTick(void);
|
||
|
|
|
||
|
|
int gpioInitialise(void);
|
||
|
|
|
||
|
|
#endif /* RPI_H_ */
|