mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 18:55:13 +03:00
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
|
|
* This file is part of the DHT22 project.
|
|
* Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "dht.h"
|
|
#include "proto.h"
|
|
#include "usb.h"
|
|
|
|
extern volatile uint32_t Tms;
|
|
|
|
static const char *helpmesg =
|
|
"'M' - start measurement\n"
|
|
"'S' - get DHT state\n"
|
|
"'R' - software reset\n"
|
|
"'W' - test watchdog\n"
|
|
;
|
|
|
|
const char *parse_cmd(const char *buf){
|
|
if(buf[1] != '\n') return buf;
|
|
switch(*buf){
|
|
case 'M':
|
|
if(DHT_start(Tms)) return "Started\n";
|
|
else return "Wait a little\n";
|
|
break;
|
|
case 'R':
|
|
USB_send("Soft reset\n");
|
|
NVIC_SystemReset();
|
|
break;
|
|
case 'S':
|
|
switch(DHT_getstate()){
|
|
case DHT_SLEEP:
|
|
return "Sleeping\n";
|
|
case DHT_RESETTING:
|
|
return "Resetting\n";
|
|
case DHT_MEASURING:
|
|
return "Measuring\n";
|
|
case DHT_GOTRESULT:
|
|
return "Results are ready\n";
|
|
default:
|
|
return "Not found\n";
|
|
}
|
|
case 'W':
|
|
USB_send("Wait for reboot\n");
|
|
while(1){nop();};
|
|
break;
|
|
default: // help
|
|
return helpmesg;
|
|
break;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static char *_2str(uint32_t val, uint8_t minus){
|
|
static char strbuf[12];
|
|
char *bufptr = &strbuf[11];
|
|
*bufptr = 0;
|
|
if(!val){
|
|
*(--bufptr) = '0';
|
|
}else{
|
|
while(val){
|
|
*(--bufptr) = val % 10 + '0';
|
|
val /= 10;
|
|
}
|
|
}
|
|
if(minus) *(--bufptr) = '-';
|
|
return bufptr;
|
|
}
|
|
|
|
// return string with number `val`
|
|
char *u2str(uint32_t val){
|
|
return _2str(val, 0);
|
|
}
|
|
char *i2str(int32_t i){
|
|
uint8_t minus = 0;
|
|
uint32_t val;
|
|
if(i < 0){
|
|
minus = 1;
|
|
val = -i;
|
|
}else val = i;
|
|
return _2str(val, minus);
|
|
}
|