mirror of
https://github.com/eddyem/stm32samples.git
synced 2026-03-20 16:51:03 +03:00
351 lines
11 KiB
C++
351 lines
11 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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// !!! Some commands could change icoming string, so don't try to use it after function call !!!
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#include <stdint.h>
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extern "C"{
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#include <stm32f0.h>
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#include "can.h"
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#include "flash.h"
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#include "hashparser.h"
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#include "gpio.h"
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#include "gpioproto.h"
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#define USBIF IGPIO
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#include "strfunc.h"
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}
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extern uint32_t Tms;
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// list of all commands and handlers
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#define COMMAND_TABLE \
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COMMAND(canspeed, "CAN bus speed setter/getter (kBaud, 10..1000)") \
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COMMAND(dumpflash, "flash config dump") \
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COMMAND(help, "Show this help") \
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COMMAND(PA, "GPIOA setter/getter (type PAx=help for further info)") \
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COMMAND(PB, "GPIOB setter/getter") \
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COMMAND(reinit, "apply pin config") \
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COMMAND(storeconf, "save config to flash") \
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COMMAND(time, "show current time (ms)")
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// COMMAND(USART, "Read USART data or send (USART=hex)")
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// COMMAND(usartconf, "set USART params (e.g. usartconf=115200 8N1)")
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// COMMAND(SPI, "Read SPI data or send (SPI=hex)")
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// COMMAND(spiconf, "set SPI params")
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typedef struct {
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const char *name;
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const char *desc;
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} CmdInfo;
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// prototypes
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#define COMMAND(name, desc) static errcodes_t cmd_ ## name(const char*, char*);
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COMMAND_TABLE
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#undef COMMAND
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static const CmdInfo cmdInfo[] = { // command name, description - for `help`
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#define COMMAND(name, desc) { #name, desc },
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COMMAND_TABLE
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#undef COMMAND
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};
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// pin settings parser
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struct Keyword {
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const char *name;
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uint8_t group;
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uint8_t value;
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};
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enum KeywordGroup {
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GROUP_MODE,
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GROUP_PULL,
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GROUP_OTYPE,
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GROUP_FUNC,
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GROUP_MISC
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};
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enum MiscValues{
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MISC_MONITOR = 1,
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};
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static constexpr Keyword keywords[] = {
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{"AIN", GROUP_MODE, MODE_ANALOG},
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{"IN", GROUP_MODE, MODE_INPUT},
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{"OUT", GROUP_MODE, MODE_OUTPUT},
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{"AF", GROUP_MODE, MODE_AF},
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{"PU", GROUP_PULL, PULL_UP},
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{"PD", GROUP_PULL, PULL_DOWN},
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{"FL", GROUP_PULL, PULL_NONE},
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{"PP", GROUP_OTYPE, OUTPUT_PP},
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{"OD", GROUP_OTYPE, OUTPUT_OD},
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{"USART", GROUP_FUNC, FUNC_USART},
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{"SPI", GROUP_FUNC, FUNC_SPI},
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{"MONITOR",GROUP_MISC, MISC_MONITOR}, // monitor flag
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};
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#define NUM_KEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
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static const char* errtxt[ERR_AMOUNT] = {
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[ERR_OK] = "OK",
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[ERR_BADCMD] = "BADCMD",
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[ERR_BADPAR] = "BADPAR",
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[ERR_BADVAL] = "BADVAL",
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[ERR_WRONGLEN] = "WRONGLEN",
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[ERR_CANTRUN] = "CANTRUN",
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};
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static const char *EQ = " = "; // equal sign for getters
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/**
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* @brief splitargs - get command parameter and setter from `args`
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* @param args (i) - rest of string after command (like `1 = PU OD OUT`)
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* @param parno (o) - parameter number or -1 if none
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* @return setter (part after `=` without leading spaces) or NULL if none
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*/
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static char *splitargs(char *args, int32_t *parno){
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if(!args) return NULL;
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uint32_t U32;
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char *next = getnum(args, &U32);
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int p = -1;
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if(next != args && U32 <= MAXPARNO) p = U32;
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if(parno) *parno = p;
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next = strchr(next, '=');
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if(next){
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if(*(++next)) next = omit_spaces(next);
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if(*(++next) == 0) next = NULL;
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}
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return next;
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}
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#if 0
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/**
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* @brief argsvals - split `args` into `parno` and setter's value
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* @param args - rest of string after command
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* @param parno (o) - parameter number or -1 if none
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* @param parval - integer setter's value
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* @return false if no setter or it's not a number, true - got setter's num
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*/
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static bool argsvals(char *args, int32_t *parno, int32_t *parval){
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char *setter = splitargs(args, parno);
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if(!setter) return false;
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int32_t I32;
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char *next = getint(setter, &I32);
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if(next != setter && parval){
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*parval = I32;
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return true;
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}
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return false;
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}
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#endif
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// `port` and `pin` are checked in `parse_pin_command`
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// `PAx = ` also printed there
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static void pin_getter(uint8_t port, uint8_t pin){
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pinconfig_t *pcfg = &the_conf.pinconfig[port][pin];
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switch(pcfg->mode){
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case MODE_INPUT:
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case MODE_OUTPUT: {
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uint32_t idr = (port == 0) ? GPIOA->IDR : GPIOB->IDR;
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uint8_t bit = (idr >> pin) & 1;
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PUTCHAR(bit ? '1' : '0');
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NL();
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}
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break;
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case MODE_ANALOG:
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SENDn("TODO");
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// TODO: read ADC channel #pin
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//SENDn(u2str(get_adc_value(port, pin)));
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break;
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case MODE_AF:
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SENDn("ERR: pin in AF mode, use USART/SPI commands");
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break;
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default:
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break;
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}
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}
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// `port` and `pin` are checked in `parse_pin_command`
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// set GPIO values (if *setter is 0/1) or configure it
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static errcodes_t pin_setter(uint8_t port, uint8_t pin, char *setter){
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pinconfig_t *pcfg = &the_conf.pinconfig[port][pin];
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char _1st = *setter;
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if(_1st == '0' || _1st == '1'){ // just set/clear pin state; throw out all text after "1"/"0"
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if(pcfg->mode != MODE_OUTPUT) return ERR_CANTRUN;
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volatile GPIO_TypeDef * GPIOx = (port == 0) ? GPIOA : GPIOB;
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if(_1st == '1') GPIOx->BSRR = (1 << pin);
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else GPIOx->BRR = (1 << pin);
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return ERR_OK;
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}
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// complex setter: parse properties
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uint8_t mode_set = 0xFF, pull_set = 0xFF, otype_set = 0xFF, func_set = 0xFF;
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bool monitor = false;
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char *saveptr, *token = strtok_r(setter, " ,", &saveptr);
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while(token){
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size_t i = 0;
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for(; i < NUM_KEYWORDS; i++){
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if(strcmp(token, keywords[i].name) == 0){
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switch(keywords[i].group){
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case GROUP_MODE:
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if(mode_set != 0xFF) return ERR_BADVAL; // repeated similar group parameter
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mode_set = keywords[i].value;
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break;
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case GROUP_PULL:
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if(pull_set != 0xFF) return ERR_BADVAL;
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pull_set = keywords[i].value;
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break;
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case GROUP_OTYPE:
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if(otype_set != 0xFF) return ERR_BADVAL;
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otype_set = keywords[i].value;
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break;
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case GROUP_FUNC:
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if(func_set != 0xFF) return ERR_BADVAL;
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func_set = keywords[i].value;
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break;
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case GROUP_MISC:
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if(keywords[i].value == MISC_MONITOR) monitor = true;
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break;
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}
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break;
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}
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}
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if(i == NUM_KEYWORDS) return ERR_BADVAL; // not found
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token = strtok_r(NULL, " ,", &saveptr);
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}
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if(func_set != 0xFF) mode_set = MODE_AF;
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if(mode_set == 0xFF) return ERR_BADVAL; // user forgot to set mode
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// set defaults
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if(pull_set == 0xFF) pull_set = PULL_NONE;
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if(otype_set == 0xFF) otype_set = OUTPUT_PP;
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// can also do something with `speed_set`, then remove SPEED_MEDIUM from `curconfig`
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// check that current parameters combination is acceptable for current pin
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pinconfig_t curconf;
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curconf.mode = static_cast <pinmode_t> (mode_set);
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curconf.pull = static_cast <pinpull_t> (pull_set);
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curconf.otype = static_cast <pinout_t> (otype_set);
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curconf.speed = SPEED_MEDIUM;
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curconf.af = func_set;
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curconf.monitor = monitor;
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if(!is_func_allowed(port, pin, &curconf)) return ERR_BADVAL;
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*pcfg = curconf;
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return ERR_OK;
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}
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// PAx [= aa], PBx [= bb]
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static errcodes_t parse_pin_command(const char *cmd, char *args){
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if(!args) return ERR_BADPAR; // or maybe add list for all pins?
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char port_char = cmd[1];
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if(port_char != 'A' && port_char != 'B') return ERR_BADCMD;
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uint8_t port = (port_char == 'A') ? 0 : 1;
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int32_t pin = -1;
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char *setter = splitargs(args, &pin);
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if(pin < 0 || pin > 15) return ERR_BADPAR;
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pinconfig_t *pcfg = &the_conf.pinconfig[port][pin]; // just to check if pin can be configured
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if(!pcfg->enable) return ERR_CANTRUN; // prohibited pin
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if(!setter){ // simple getter -> get value and return ERR_AMOUNT as silence
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SEND(cmd); SEND(u2str((uint32_t)pin)); SEND(EQ);
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pin_getter(port, pin);
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return ERR_AMOUNT;
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}
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return pin_setter(port, pin, setter);
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}
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static errcodes_t cmd_PA(const char *cmd, char *args){
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return parse_pin_command(cmd, args);
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}
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static errcodes_t cmd_PB(const char *cmd, char *args){
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return parse_pin_command(cmd, args);
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}
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static errcodes_t cmd_reinit(const char _U_ *cmd, char _U_ *args){
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if(gpio_reinit()) return ERR_OK;
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SEND("Can't reinit: check your configuration!\n");
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return ERR_AMOUNT;
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}
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static errcodes_t cmd_storeconf(const char _U_ *cmd, char _U_ *args){
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if(!store_userconf()) return ERR_CANTRUN;
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return ERR_OK;
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}
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// canspeed = baudrate (kBaud)
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static errcodes_t cmd_canspeed(const char *cmd, char _U_ *args){
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SEND(cmd); PUTCHAR('='); SENDn(u2str(CAN_getspeed()));
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if(args && *args){SEND("You entered: "); SENDn(args);}
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return ERR_AMOUNT;
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}
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static errcodes_t cmd_dumpflash(const char _U_ *cmd, char _U_ *args){
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SEND("userconf_sz="); SEND(u2str(the_conf.userconf_sz));
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SEND("\ncurrentconfidx="); SENDn(i2str(currentconfidx));
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for(int i = 0; i < InterfacesAmount; ++i){
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SEND("interface"); PUTCHAR('0' + i);
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PUTCHAR('=');
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int l = the_conf.iIlengths[i] / 2;
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char *ptr = (char*) the_conf.iInterface[i];
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for(int j = 0; j < l; ++j){
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PUTCHAR(*ptr);
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ptr += 2;
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}
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NL();
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}
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SEND("canspeed="); SENDn(u2str(the_conf.CANspeed));
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return ERR_AMOUNT;
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}
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static errcodes_t cmd_time(const char* cmd, char _U_ *args){
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SEND(cmd); PUTCHAR('='); SENDn(u2str(Tms));
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return ERR_AMOUNT;
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}
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static errcodes_t cmd_help(const char _U_ *cmd, char _U_ *args){
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SEND(REPOURL);
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for(size_t i = 0; i < sizeof(cmdInfo)/sizeof(cmdInfo[0]); i++){
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SEND(cmdInfo[i].name);
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SEND(" - ");
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SENDn(cmdInfo[i].desc);
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}
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return ERR_AMOUNT;
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}
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constexpr uint32_t hash(const char* str, uint32_t h = 0){
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return *str ? hash(str + 1, h + ((h << 7) ^ *str)) : h;
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}
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// TODO: add checking real command length!
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void chk(char *str){
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if(!str || !*str) return;
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char command[CMD_MAXLEN+1];
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int i = 0;
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while(*str > '@' && i < CMD_MAXLEN){ command[i++] = *str++; }
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command[i] = 0;
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while(*str && *str <= ' ') ++str;
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char *restof = (char*) str;
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uint32_t h = hash(command);
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errcodes_t ecode = ERR_AMOUNT;
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switch(h){
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#define COMMAND(name, desc) case hash(#name): ecode = cmd_ ## name(command, restof); break;
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COMMAND_TABLE
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#undef COMMAND
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default: SEND("Unknown command, try 'help'\n"); break;
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}
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if(ecode < ERR_AMOUNT) SENDn(errtxt[ecode]);
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;
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}
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