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