mirror of
https://github.com/eddyem/stm32samples.git
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135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
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* This file is part of the usbcangpio project.
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* Copyright 2026 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdint.h>
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#ifdef EBUG
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#define USBIF IGPIO
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#include "strfunc.h"
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#define DBG(x) SEND(x)
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#define DBGNL() NL()
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#else
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#define DBG(x)
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#define DBGNL()
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#endif
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// MODER
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typedef enum{
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MODE_INPUT = 0,
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MODE_OUTPUT = 1,
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MODE_AF = 2,
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MODE_ANALOG = 3
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} pinmode_t;
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// PUPDR
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typedef enum{
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PULL_NONE = 0,
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PULL_UP = 1,
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PULL_DOWN = 2
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} pinpull_t;
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// OTYPER
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typedef enum{
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OUTPUT_PP = 0,
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OUTPUT_OD = 1
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} pinout_t;
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// OSPEEDR
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typedef enum{
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SPEED_LOW = 0,
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SPEED_MEDIUM = 1,
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SPEED_HIGH = 3
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} pinspeed_t;
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// !!! FuncNames means position of bit in funcvalues_t.flags!
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enum FuncNames{ // shift 1 by this to get "canUSART" etc; not more than 7!
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FUNC_AIN = 0,
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FUNC_USART = 1,
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FUNC_SPI = 2,
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FUNC_I2C = 3,
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FUNC_AMOUNT // just for arrays' sizes
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};
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/*
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typedef union{
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struct{
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uint8_t canADC : 1;
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uint8_t canUSART : 1;
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uint8_t canSPI : 1;
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};
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uint8_t flags;
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} funcvalues_t;
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*/
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typedef struct{
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uint8_t enable : 1; // [immutable!] pin config avialable (==1 for PA0-PA3, PA5-PA7, PA9, PA10, PB0-PB7, PB10, PB11, ==0 for rest)
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pinmode_t mode : 2;
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pinpull_t pull : 2;
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pinout_t otype : 1;
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pinspeed_t speed : 2;
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uint8_t afno : 3; // alternate function number (only if mode == MODE_AF)
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uint8_t af : 3; // alternate function name (`FuncNames`)
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uint8_t monitor : 1; // monitor changes
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} pinconfig_t;
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typedef struct{
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uint32_t baudrate;
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uint8_t databits; // 8 or 9
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char parity; // 'N','E','O'
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uint8_t stopbits; // 1 or 2
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uint8_t enabled; // is USART active (flag `monitor` taken from pinconfig_t also as Rx/Tx enable)
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} usartconfig_t;
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typedef struct{
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uint32_t speed;
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uint8_t cpol : 1;
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uint8_t cpha : 1;
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uint8_t lsbfirst : 1;
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uint8_t enabled : 1;
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} spiconfig_t;
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// strings for keywords
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extern const char *str_keywords[];
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#define KEYWORDS \
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KW(AIN) \
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KW(IN) \
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KW(OUT) \
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KW(AF) \
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KW(PU)\
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KW(PD) \
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KW(FL) \
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KW(PP) \
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KW(OD) \
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KW(USART) \
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KW(SPI) \
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KW(I2C) \
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KW(MONITOR)
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enum{ // indexes of string keywords
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#define KW(k) STR_ ## k,
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KEYWORDS
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#undef KW
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};
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int set_pinfunc(uint8_t port, uint8_t pin, pinconfig_t *pcfg);
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int gpio_reinit();
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int pin_out(uint8_t port, uint8_t pin, uint8_t newval);
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int16_t pin_in(uint8_t port, uint8_t pin);
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uint16_t gpio_alert(uint8_t port);
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