ed2b6ea0a8
Previously the hardware I2C timeout was hard coded to 50ms which isn't guaranteed to be enough depending on the clock stretching specs of the I2C device(s) in use. This patch ensures the hardware I2C implementation honors the existing timeout argument passed to the machine.I2C constructor. The default timeout for software and hardware I2C is now 50ms.
66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_STM32_I2C_H
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#define MICROPY_INCLUDED_STM32_I2C_H
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#include "dma.h"
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// use this for OwnAddress1 to configure I2C in master mode
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#define PYB_I2C_MASTER_ADDRESS (0xfe)
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typedef struct _pyb_i2c_obj_t {
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mp_obj_base_t base;
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I2C_HandleTypeDef *i2c;
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const dma_descr_t *tx_dma_descr;
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const dma_descr_t *rx_dma_descr;
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bool *use_dma;
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} pyb_i2c_obj_t;
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extern I2C_HandleTypeDef I2CHandle1;
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extern I2C_HandleTypeDef I2CHandle2;
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extern I2C_HandleTypeDef I2CHandle3;
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extern I2C_HandleTypeDef I2CHandle4;
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extern const mp_obj_type_t pyb_i2c_type;
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extern const pyb_i2c_obj_t pyb_i2c_obj[4];
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void i2c_init0(void);
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void pyb_i2c_init(I2C_HandleTypeDef *i2c);
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void pyb_i2c_init_freq(const pyb_i2c_obj_t *self, mp_int_t freq);
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uint32_t pyb_i2c_get_baudrate(I2C_HandleTypeDef *i2c);
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void i2c_ev_irq_handler(mp_uint_t i2c_id);
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void i2c_er_irq_handler(mp_uint_t i2c_id);
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typedef I2C_TypeDef i2c_t;
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int i2c_init(i2c_t *i2c, mp_hal_pin_obj_t scl, mp_hal_pin_obj_t sda, uint32_t freq, uint16_t timeout);
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int i2c_start_addr(i2c_t *i2c, int rd_wrn, uint16_t addr, size_t len, bool stop);
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int i2c_read(i2c_t *i2c, uint8_t *dest, size_t len, size_t next_len);
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int i2c_write(i2c_t *i2c, const uint8_t *src, size_t len, size_t next_len);
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int i2c_readfrom(i2c_t *i2c, uint16_t addr, uint8_t *dest, size_t len, bool stop);
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int i2c_writeto(i2c_t *i2c, uint16_t addr, const uint8_t *src, size_t len, bool stop);
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#endif // MICROPY_INCLUDED_STM32_I2C_H
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