mirror of
https://github.com/eddyem/stm32samples.git
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96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* This file is part of the DHT22 project.
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* Copyright 2021 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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#include "dht.h"
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#include "proto.h"
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#include "usb.h"
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extern volatile uint32_t Tms;
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static const char *helpmesg =
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"'M' - start measurement\n"
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"'S' - get DHT state\n"
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"'R' - software reset\n"
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"'W' - test watchdog\n"
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;
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const char *parse_cmd(const char *buf){
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if(buf[1] != '\n') return buf;
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switch(*buf){
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case 'M':
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if(DHT_start(Tms)) return "Started\n";
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else return "Wait a little\n";
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break;
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case 'R':
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USB_send("Soft reset\n");
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NVIC_SystemReset();
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break;
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case 'S':
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switch(DHT_getstate()){
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case DHT_SLEEP:
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return "Sleeping\n";
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case DHT_RESETTING:
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return "Resetting\n";
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case DHT_MEASURING:
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return "Measuring\n";
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case DHT_GOTRESULT:
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return "Results are ready\n";
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default:
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return "Not found\n";
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}
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case 'W':
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USB_send("Wait for reboot\n");
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while(1){nop();};
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break;
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default: // help
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return helpmesg;
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break;
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}
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return NULL;
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}
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static char *_2str(uint32_t val, uint8_t minus){
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static char strbuf[12];
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char *bufptr = &strbuf[11];
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*bufptr = 0;
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if(!val){
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*(--bufptr) = '0';
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}else{
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while(val){
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*(--bufptr) = val % 10 + '0';
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val /= 10;
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}
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}
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if(minus) *(--bufptr) = '-';
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return bufptr;
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}
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// return string with number `val`
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char *u2str(uint32_t val){
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return _2str(val, 0);
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}
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char *i2str(int32_t i){
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uint8_t minus = 0;
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uint32_t val;
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if(i < 0){
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minus = 1;
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val = -i;
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}else val = i;
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return _2str(val, minus);
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}
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