710b5d8aff
1) Bus error will be thrown on read/write errors with errno set. (Read didn't used to fail at all.) 2) try_lock correctly returns boolean whether lock was grabbed. Fixes #87
71 lines
3.2 KiB
C
71 lines
3.2 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2016 Scott Shawcroft
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
// Machine is the HAL for low-level, hardware accelerated functions. It is not
|
|
// meant to simplify APIs, its only meant to unify them so that other modules
|
|
// do not require port specific logic.
|
|
//
|
|
// This file includes externs for all functions a port should implement to
|
|
// support the machine module.
|
|
|
|
#ifndef __MICROPY_INCLUDED_SHARED_BINDINGS_NATIVEIO_I2C_H__
|
|
#define __MICROPY_INCLUDED_SHARED_BINDINGS_NATIVEIO_I2C_H__
|
|
|
|
#include "py/obj.h"
|
|
|
|
#include "common-hal/microcontroller/types.h"
|
|
#include "common-hal/nativeio/types.h"
|
|
|
|
// Type object used in Python. Should be shared between ports.
|
|
extern const mp_obj_type_t nativeio_i2c_type;
|
|
|
|
// Initializes the hardware peripheral.
|
|
extern void common_hal_nativeio_i2c_construct(nativeio_i2c_obj_t *self,
|
|
const mcu_pin_obj_t * scl,
|
|
const mcu_pin_obj_t * sda,
|
|
uint32_t frequency);
|
|
|
|
extern void common_hal_nativeio_i2c_deinit(nativeio_i2c_obj_t *self);
|
|
|
|
extern bool common_hal_nativeio_i2c_try_lock(nativeio_i2c_obj_t *self);
|
|
extern bool common_hal_nativeio_i2c_has_lock(nativeio_i2c_obj_t *self);
|
|
extern void common_hal_nativeio_i2c_unlock(nativeio_i2c_obj_t *self);
|
|
|
|
// Probe the bus to see if a device acknowledges the given address.
|
|
extern bool common_hal_nativeio_i2c_probe(nativeio_i2c_obj_t *self, uint8_t addr);
|
|
|
|
// Write to the device and return 0 on success or an appropriate error code from mperrno.h
|
|
extern uint8_t common_hal_nativeio_i2c_write(nativeio_i2c_obj_t *self, uint16_t address,
|
|
const uint8_t * data, size_t len,
|
|
bool stop);
|
|
|
|
// Reads memory of the i2c device picking up where it left off and return 0 on
|
|
// success or an appropriate error code from mperrno.h
|
|
extern uint8_t common_hal_nativeio_i2c_read(nativeio_i2c_obj_t *self, uint16_t address,
|
|
uint8_t * data, size_t len);
|
|
|
|
#endif // __MICROPY_INCLUDED_SHARED_BINDINGS_NATIVEIO_I2C_H__
|