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extmod/virtpin: Initial implementation of open-ended C-level Pin interface.

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Using usual method of virtual method tables. Single virtual method,
ioctl, is defined currently for all operations. This universal and
extensible vtable-based method is also defined as a default MPHAL
GPIO implementation, but a specific port may override it with its
own implementation (e.g. close-ended, but very efficient, e.g. avoiding
virtual method dispatch).
This commit is contained in:
Paul Sokolovsky
2016-05-27 00:57:18 +03:00
parent 74e6c0337d
commit 751e3b7a82
4 changed files with 89 additions and 0 deletions
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9
py/mphal.h
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@@ -66,4 +66,13 @@ mp_uint_t mp_hal_ticks_ms(void);
mp_uint_t mp_hal_ticks_us(void);
#endif
// If port HAL didn't define its own pin API, use generic
// "virtual pin" API from the core.
#ifndef mp_hal_pin_obj_t
#define mp_hal_pin_obj_t mp_obj_t
#define mp_hal_get_pin_obj(pin) (pin)
#define mp_hal_pin_read(pin) mp_virtual_pin_read(pin)
#define mp_hal_pin_write(pin, v) mp_virtual_pin_write(pin, v)
#endif
#endif // __MICROPY_INCLUDED_PY_MPHAL_H__