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9db2398009
This is necessary for the machine.CAN implementation to use the same low-level functions. Includes some refactoring around FIFO selection as there was a footgun where CAN_FIFO0/1 are 0/1 but FDCAN_RX_FIFO0/1 are not. Added an explicit type for non-hardware-specific FIFO numbering. Also moved responsibility for re-enabling CAN receive interrupts into the higher layer (pyb_can.c layer) after calling can_receive(). Also includes this behaviour change for FDCAN boards: - Fix for boards with FDCAN not updating error status counters (num_error_warning, num_error_passive, num_bus_off). These are now updated the same as on boards with CAN Classic controllers, as documented. - Previously FDCAN boards would trigger the RX callback function on error events instead (passing undocumented irq numbers 3, 4, 5). This behaviour has been removed in favour of the documented behaviour of updating the status counters. This work was funded through GitHub Sponsors. Signed-off-by: Angus Gratton <angus@redyak.com.au>
59 lines
1.9 KiB
C
59 lines
1.9 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) 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_PYB_CAN_H
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#define MICROPY_INCLUDED_STM32_PYB_CAN_H
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#include "py/mphal.h"
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#if MICROPY_HW_ENABLE_CAN
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#include "py/obj.h"
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#include "can.h"
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typedef struct _pyb_can_obj_t {
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mp_obj_base_t base;
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mp_obj_t rxcallback0;
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mp_obj_t rxcallback1;
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mp_uint_t can_id : 8;
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bool is_enabled : 1;
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byte rx_state0;
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byte rx_state1;
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uint16_t num_error_warning;
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uint16_t num_error_passive;
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uint16_t num_bus_off;
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CAN_HandleTypeDef can;
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} pyb_can_obj_t;
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extern const mp_obj_type_t pyb_can_type;
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void pyb_can_deinit_all(void);
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void pyb_can_init0(void);
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void pyb_can_irq_handler(uint can_id, can_rx_fifo_t fifo, can_int_t interrupt);
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#endif
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#endif
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