a9efffca96
This commit adds support for the dual-analog-pads on STM32H7 parts. These
pads/pins are called PA0_C/PA1_C/PC2_C/PC3_C in the datasheet. They each
have an analog switch that can optionally connect them to their normal pin
(eg PA0). When the switch is open, the normal and _C pin are independent
pins/pads.
The approach taken in this commit to make these _C pins available to Python
is:
- put them in their own, independent row in the stm32h7_af.csv definition
file, with only the ADC column defined (they are separate machine.Pin
entities, and doing it this way keeps make-pins.py pretty clean)
- allow a board to reference these pins in the board's pins.csv file by the
name PA0_C etc (so a board can alias them, for example)
- these pins (when enabled in pins.csv) now become available like any other
machine.Pin through both machine.Pin.board and machine.Pin.cpu
- BUT these _C pins have a separate pin type which doesn't have any
methods, because they don't have any functionality
- these _C pins can be used with machine.ADC to construct the appropriate
ADC object, either by passing the string as machine.ADC("PA0_C") or by
passing the object as machine.ADC(machine.Pin.cpu.PA0_C)
- if a board defines both the normal and _C pin (eg both PA0 and PA0_C) in
pins.csv then it must not define the analog switch to be closed (this is
a sanity check for the build, because it doesn't make sense to close the
switch and have two separate pins)
Signed-off-by: Damien George <damien@micropython.org>
84 lines
3.1 KiB
C
84 lines
3.1 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_PIN_H
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#define MICROPY_INCLUDED_STM32_PIN_H
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// This file requires pin_defs_xxx.h (which has port specific enums and
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// defines, so we include it here. It should never be included directly
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#include MICROPY_PIN_DEFS_PORT_H
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#include "py/obj.h"
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typedef struct {
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mp_obj_base_t base;
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qstr name;
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uint8_t idx;
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uint8_t fn;
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uint8_t unit;
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uint8_t type;
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void *reg; // The peripheral associated with this AF
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} pin_af_obj_t;
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typedef struct {
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mp_obj_base_t base;
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qstr name;
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uint32_t port : 4;
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uint32_t pin : 5; // Some ARM processors use 32 bits/PORT
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uint32_t num_af : 4;
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uint32_t adc_channel : 5; // Some ARM processors use 32 bits/PORT
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uint32_t adc_num : 3; // 1 bit per ADC
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uint32_t pin_mask;
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pin_gpio_t *gpio;
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const pin_af_obj_t *af;
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} machine_pin_obj_t;
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extern const mp_obj_type_t pin_type;
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extern const mp_obj_type_t pin_analog_type;
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extern const mp_obj_type_t pin_af_type;
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// Include all of the individual pin objects
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#include "genhdr/pins.h"
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extern const mp_obj_type_t pin_board_pins_obj_type;
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extern const mp_obj_type_t pin_cpu_pins_obj_type;
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extern const mp_obj_dict_t machine_pin_cpu_pins_locals_dict;
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extern const mp_obj_dict_t machine_pin_board_pins_locals_dict;
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MP_DECLARE_CONST_FUN_OBJ_KW(pin_init_obj);
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void pin_init0(void);
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uint32_t pin_get_mode(const machine_pin_obj_t *pin);
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uint32_t pin_get_pull(const machine_pin_obj_t *pin);
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uint32_t pin_get_af(const machine_pin_obj_t *pin);
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const machine_pin_obj_t *pin_find(mp_obj_t user_obj);
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const machine_pin_obj_t *pin_find_named_pin(const mp_obj_dict_t *named_pins, mp_obj_t name);
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const pin_af_obj_t *pin_find_af(const machine_pin_obj_t *pin, uint8_t fn, uint8_t unit);
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const pin_af_obj_t *pin_find_af_by_index(const machine_pin_obj_t *pin, mp_uint_t af_idx);
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const pin_af_obj_t *pin_find_af_by_name(const machine_pin_obj_t *pin, const char *name);
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#endif // MICROPY_INCLUDED_STM32_PIN_H
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