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https://github.com/eddyem/ARMsingleboard.git
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91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/*
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* This file is part of the bmp280 project.
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* Copyright 2022 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 <stdio.h>
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#include <unistd.h>
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#include <usefull_macros.h>
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#include "BMP280.h"
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#include "i2c.h"
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typedef struct{
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char *device;
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int slaveaddr;
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int help;
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} glob_pars;
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static glob_pars G = {.device = "/dev/i2c-3", .slaveaddr = BMP280_I2C_ADDRESS};
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static myoption cmdlnopts[] = {
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{"help", NO_ARGS, NULL, 'h', arg_int, APTR(&G.help), _("show this help")},
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{"device", NEED_ARG, NULL, 'd', arg_string, APTR(&G.device), _("I2C device path")},
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{"slave", NEED_ARG, NULL, 'a', arg_int, APTR(&G.slaveaddr), _("I2C slave address (0x76 or 0x77)")},
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end_option
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};
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int main(int argc, char **argv){
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initial_setup();
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parseargs(&argc, &argv, cmdlnopts);
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if(G.help) showhelp(-1, cmdlnopts);
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if(G.slaveaddr < 0 || G.slaveaddr > 0x7f) ERRX("I2C address should be 7-bit");
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if(!i2c_open(G.device)) ERR("Can't open %s", G.device);
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if(!i2c_set_slave_address((uint8_t)G.slaveaddr)){
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WARN("Can't set slave address 0x%02x", G.slaveaddr);
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goto clo;
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}
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if(!i2c_read_reg8(0, NULL)) ERR("Can't connect!");
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while(!BMP280_init()) sleep(1);
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uint8_t devid;
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BMP280_read_ID(&devid);
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DBG("ID: 0x%02x", devid);
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while(!BMP280_start()){
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DBG("Trying to start");
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sleep(1);
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}
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while (1){
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BMP280_process();
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BMP280_status s = BMP280_get_status();
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if(s == BMP280_RDY){ // data ready - get it
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float T, P, H;
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int ntries = 0;
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for(; ntries < 3; ++ntries) if(BMP280_getdata(&T, &P, &H)) break;
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if(ntries == 3){
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WARNX("Can't read data");
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continue;
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}
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float mm = P * 0.00750062f;
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printf("T=%.1f, P=%.1fPa (%.1fmmHg)", T, P, mm);
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if(devid == BME280_CHIP_ID){ // got humidity too
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printf(", H=%.1f%%", H);
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}
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printf("\n");
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sleep(5);
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while(!BMP280_start()) usleep(1000);
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}else if(s == BMP280_ERR){
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printf("Error in measurement\n");
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BMP280_reset();
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BMP280_init();
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}
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}
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clo:
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i2c_close();
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return 0;
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}
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