BeagleBoneBlack for LPS331 (i2c) driver and rrdtool setting
lps331.c
// LPS331AP Driver Ver.0.01 // // Written by H.Nitobe 2015/07/06 // // LPS331AP // MEMS pressure sensor: 260-1260 mbar absolute digital output barometer // http://www.st.com/web/en/resource/technical/document/datasheet/DM00036196.pdf // #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <errno.h> #include <time.h> #include <sys/ioctl.h> #include <linux/i2c-dev.h> #define LPS331_address 0x5d #define REF_PRESS_L 0x08 #define REF_PRESS_M 0x09 #define REF_PRESS_H 0x0a #define WHO_AM_I 0x0f #define RES_CONF 0x10 #define CTRL_REG1 0x20 #define CTRL_REG2 0x21 #define STATUS_REG 0x27 #define PRESS_L 0x28 #define PRESS_M 0x29 #define PRESS_H 0x2a #define TEMP_L 0x2b #define TEMP_H 0x2c //#define DEBUG #ifdef DEBUG #define debug printf #else #define debug 1 ? (void) 0 : printf #endif typedef unsigned char U8; typedef unsigned long U32; int open_i2c(char *path_name, int flags); int ioctl_i2c(int file_descriptor, U32 request, U8 address); int write_i2c(int file_descriptor, U8 address, U8 data); U8 read_i2c(int file_descriptor, U8 address); int main(int argc, char *argv[]) { clock_t start, end; int LPS331; U32 press_raw; short temp_raw; float press, temp; LPS331 = open_i2c("/dev/i2c-1", O_RDWR); ioctl_i2c(LPS331, I2C_SLAVE, LPS331_address); #ifdef DEBUG printf("[debug] WHO_AM_I = %x\n", read_i2c(LPS331, WHO_AM_I)); printf("[debug] STATUS_REG = %x\n", read_i2c(LPS331, STATUS_REG)); #endif // write_i2c(LPS331, CTRL_REG1, 0xe0); // write_i2c(LPS331, CTRL_REG1, 0x00); // debug("", read_i2c(LPS331, CTRL_REG1)); // RES_CONF(10h) Pressure resolution mode // | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | // | | Nr. internal average | Nr. internal average | // | RFU | AVGT2 | AVGT1 | AVGT0 | AVGP3 | AVGP2 | AVGP1 | AVGP0 | // | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | // | | 128 | 512 | write_i2c(LPS331, RES_CONF, 0x7a); debug("", read_i2c(LPS331, RES_CONF)); /* ONE_SHOT bit is used to start a new conversion when ODR1-ODR0 bits in CTRL_REG1 are set to "000" In this situation a single acquisition of temperature and pressure is started when ONE_SHOT bit is set to '1' At the end of conversion the new data are available in the output registers, the STAUS_REG[0] and STAUS_REG[1] bits are set to '1' and the ONE_SHOT bit comes back to '0' by hardware. */ // Active Mode & One Shot Mode & Block Data Update // CTRL_REG1 Control register 1 // | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | // | | Output data rate | | | | | // | PD | ODR2 | ODR1 | ODR0 | DIFF | BDU | DELTA | SIM | // | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | // |ACTIVE | One Shot | no | yes | no | no | write_i2c(LPS331, CTRL_REG1, 0x84); debug("", read_i2c(LPS331, CTRL_REG1)); // Oneshot Trigger // CTRL_REG2 Control register 2 // | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | // | | RESERVED | | | | // | BOOT | |S RESET|A ZERO |ONESHOT| // | 0 | | 0 | 0 | 1 | // |Normal | | no | no | yes | write_i2c(LPS331, CTRL_REG2, 0x01); #ifdef DEBUG start = clock(); #endif while((read_i2c(LPS331, CTRL_REG2) && 0x01) == 0x01){ usleep(30000); } #ifdef DEBUG end = clock(); #endif debug("[debug] wait : %f\n", (float)(end - start)/CLOCKS_PER_SEC); press_raw = read_i2c(LPS331, PRESS_L); press_raw |= read_i2c(LPS331, PRESS_M) << 8; press_raw |= read_i2c(LPS331, PRESS_H) << 16; debug("[debug] Pdac = %08x:%06d\n", press_raw, press_raw); temp_raw = read_i2c(LPS331, TEMP_L); temp_raw |= read_i2c(LPS331, TEMP_H) << 8; debug("[debug] Tdac = %4x:%6d\n", temp_raw, temp_raw); // Power Down Mode // CTRL_REG1 Control register 1 // | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | // | | Output data rate | | | | | // | PD | ODR2 | ODR1 | ODR0 | DIFF | BDU | DELTA | SIM | // | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | // |PowDown| One Shot | no | no | no | no | write_i2c(LPS331, CTRL_REG1, 0x00); debug("", read_i2c(LPS331, CTRL_REG1)); debug("[debug] close(%x);\n", LPS331); close(LPS331); press = (float) press_raw / 4096.0f; // temp = ((float)temp_raw / 480.0f) + 42.5f; temp = ((float)temp_raw / 480.0f) + 37.5f; printf("%f:%f\n", press, temp); return 0; } int open_i2c(char *path_name, int flags){ int file_descriptor; debug("[debug] open(%s, %x);\n", path_name, flags); if((file_descriptor = open(path_name, flags)) < 0){ perror("[error] i2cbus open"); exit(1); } debug("[debug] file_descriptor = %x;\n", file_descriptor); return file_descriptor; } int ioctl_i2c(int file_descriptor, U32 request, U8 address){ int status = 0; debug("[debug] ioctl(%x, %x, %x);\n",file_descriptor,request,address); if((status = ioctl(file_descriptor, request, address)) < 0){ perror("[error] can't set request"); debug("[debug] close(%x);\n", file_descriptor); close(file_descriptor); exit(1); } return status; } int write_i2c(int file_descriptor, U8 address, U8 data){ U8 buf[2] = {address, data}; debug("[debug] write_i2c(%x, %x, %x);\n", file_descriptor, address, data); if(write(file_descriptor, buf, 2) != 2){ perror("[error] write address/data"); debug("close(%x);\n", file_descriptor); close(file_descriptor); exit(1); } return 0; } U8 read_i2c(int file_descriptor, U8 address){ U8 data; debug("[debug] write(%x, %x, 1);\n", file_descriptor, address); if((write(file_descriptor, &address, 1)) != 1){ perror("[error] write address"); debug("[debug] close(file_descriptor);\n"); close(file_descriptor); exit(1); } debug("[debug] read(file_descriptor, &data, 1); : "); if((read(file_descriptor, &data, 1)) != 1){ perror("[error] read data"); debug("[debug] close(file_descriptor);\n"); close(file_descriptor); exit(1); } debug("%02x:%03d\n", data, data); return data; }
root@beaglebone:~/rrdtool# gcc -o lps331 lps331.c root@beaglebone:~/rrdtool# ls -al total 36 drwxr-xr-x 2 root root 4096 Jul 7 17:29 . drwxr-xr-x 7 root root 4096 Jul 7 17:23 .. -rwxr-xr-x 1 root root 6809 Jul 7 17:29 lps331 -rw-r--r-- 1 root root 5158 Jul 7 17:13 lps331.c -rwxr-xr-x 1 root root 381 Jul 6 18:24 lps331_create.sh -rwxr-xr-x 1 root root 3492 Jul 6 17:12 lps331_graph.sh -rwxr-xr-x 1 root root 122 Jul 6 18:24 lps331_update.sh root@beaglebone:~/rrdtool#
lps331_create.sh
#!/bin/bash /usr/bin/rrdtool create /var/www/rrdtool/lps331.rrd \ --step 60 \ DS:LPS331_pres:GAUGE:120:260:1260 \ DS:LPS331_temp:GAUGE:120:-25:108 \ RRA:LAST:0.5:1:10080 \ RRA:AVERAGE:0.5:5:2016 \ RRA:AVERAGE:0.5:30:1536 \ RRA:AVERAGE:0.5:720:732 \ RRA:MIN:0.5:5:2016 \ RRA:MIN:0.5:30:1536 \ RRA:MIN:0.5:720:732 \ RRA:MAX:0.5:5:2016 \ RRA:MAX:0.5:30:1536 \ RRA:MAX:0.5:720:732 \
lps331_update.sh
#!/bin/sh RRD="/usr/bin/rrdtool update" RRA="/var/www/rrdtool/lps331.rrd" DATA=`/root/rrdtool/lps331` $RRD $RRA N:$DATA
lps331_graph.sh
#!/bin/bash export LANG=C RRD="/usr/bin/rrdtool graph" RRA="/var/www/rrdtool/lps331.rrd" date="/bin/date" NOW=`$date +%s` D=`$date +"%F"` T=`$date +"%H\:%M"` TODAY=`$date +%y%m%d` TIMESTAMP00=`$date --date "$TODAY" +%s` TIMESTAMP12=`expr $TIMESTAMP00 + 43200` GRP="/var/www/rrdtool/lps331_daily.png" $RRD $GRP \ --start -25hour \ --end $NOW \ --imgformat PNG \ --title "LPS331(Daily)" \ --width 600 \ --height 200 \ --vertical-label "hPa" \ --y-grid 1:2 \ --alt-autoscale \ --units-exponent 0 \ --right-axis-label 'deg.C' \ --right-axis 1:-1000 \ --right-axis-format %4.2lf \ --x-grid MINUTE:30:HOUR:6:HOUR:1:0:%H \ HRULE:0#FF0000 \ VRULE:$TIMESTAMP00#FF0000 \ VRULE:$TIMESTAMP12#FF0000 \ DEF:pres=$RRA:LPS331_pres:LAST \ DEF:temp=$RRA:LPS331_temp:LAST \ CDEF:Temp=temp,1000,+ \ LINE1:Temp#00CC00:"temp\:" \ GPRINT:temp:MIN:"MIN\:%6.2lf " \ GPRINT:temp:AVERAGE:"AVERAGE\:%6.2lf " \ GPRINT:temp:MAX:"MAX\:%6.2lf " \ GPRINT:temp:LAST:"LAST\:%6.2lf \n" \ LINE1:pres#0000CC:"Pres\:" \ GPRINT:pres:MIN:"MIN\:%6.1lf " \ GPRINT:pres:AVERAGE:"AVERAGE\:%6.1lf " \ GPRINT:pres:MAX:"MAX\:%6.1lf " \ GPRINT:pres:LAST:"LAST\:%6.1lf \n" \ COMMENT:"$D $T\r" \ GRP="/var/www/rrdtool/lps331_weekly.png" $RRD $GRP \ --start -8day \ --end $NOW \ --imgformat PNG \ --title "LPS331(Weekly)" \ --width 600 \ --height 200 \ --vertical-label "hPa" \ --y-grid 1:2 \ --units-exponent 0 \ --alt-autoscale \ --right-axis-label 'deg.C' \ --right-axis 1:-1000 \ --right-axis-format %3.1lf \ --x-grid HOUR:4:DAY:1:DAY:1:86400:"%m/%d(%a)" \ HRULE:0#FF0000 \ DEF:pres=$RRA:LPS331_pres:AVERAGE \ DEF:temp=$RRA:LPS331_temp:AVERAGE \ CDEF:Temp=temp,1000,+ \ LINE1:Temp#00CC00:"temp\:" \ GPRINT:temp:MIN:"MIN\:%6.1lf " \ GPRINT:temp:AVERAGE:"AVERAGE\:%6.1lf " \ GPRINT:temp:MAX:"MAX\:%6.1lf \n" \ LINE1:pres#0000CC:"pres\:" \ GPRINT:pres:MIN:"MIN\:%6.1lf " \ GPRINT:pres:AVERAGE:"AVERAGE\:%6.1lf " \ GPRINT:pres:MAX:"MAX\:%6.1lf \n" \ COMMENT:"$D $T\r" \ GRP="/var/www/rrdtool/lps331_monthly.png" $RRD $GRP \ --start -32day \ --end $NOW \ --imgformat PNG \ --title "LPS331(Monthly)" \ --width 600 \ --height 200 \ --vertical-label "hPa" \ --y-grid 1:2 \ --units-exponent 0 \ --alt-autoscale \ --right-axis-label 'deg.C' \ --right-axis 1:-1000 \ --right-axis-format %3.1lf \ --x-grid DAY:1:WEEK:1:WEEK:1:604800:%U \ HRULE:0#FF0000 \ DEF:pres=$RRA:LPS331_pres:AVERAGE \ DEF:temp=$RRA:LPS331_temp:AVERAGE \ CDEF:Temp=temp,1000,+ \ LINE1:Temp#00CC00:"temp\:" \ GPRINT:temp:MIN:"MIN\:%6.1lf " \ GPRINT:temp:AVERAGE:"AVERAGE\:%6.1lf " \ GPRINT:temp:MAX:"MAX\:%6.1lf \n" \ LINE1:pres#0000CC:"pres\:" \ GPRINT:pres:MIN:"MIN\:%6.1lf " \ GPRINT:pres:AVERAGE:"AVERAGE\:%6.1lf " \ GPRINT:pres:MAX:"MAX\:%6.1lf \n" \ COMMENT:"$D $T\r" \ GRP="/var/www/rrdtool/lps331_yearly.png" $RRD $GRP \ --start -366day \ --end $NOW \ --imgformat PNG \ --title "LPS331(Yearly)" \ --width 600 \ --height 200 \ --vertical-label "hPa" \ --y-grid 1:2 \ --units-exponent 0 \ --alt-autoscale \ --right-axis-label 'deg.C' \ --right-axis 1:-1000 \ --right-axis-format %3.1lf \ --x-grid WEEK:1:MONTH:1:MONTH:1:2592000:%b \ HRULE:0#FF0000 \ DEF:pres=$RRA:LPS331_pres:AVERAGE \ DEF:temp=$RRA:LPS331_temp:AVERAGE \ CDEF:Temp=temp,1000,+ \ LINE1:Temp#00CC00:"temp\:" \ GPRINT:temp:MIN:"MIN\:%6.1lf " \ GPRINT:temp:AVERAGE:"AVERAGE\:%6.1lf " \ GPRINT:temp:MAX:"MAX\:%6.1lf\n" \ LINE1:pres#0000CC:"pres\:" \ GPRINT:pres:MIN:"MIN\:%6.1lf " \ GPRINT:pres:AVERAGE:"AVERAGE\:%6.1lf " \ GPRINT:pres:MAX:"MAX\:%6.1lf\n" \ COMMENT:"$D $T\r" \
/root/.ssh/config
Host mbsrv HostName 36.3.???.??? User ????? Protocol 2 PubkeyAuthentication yes
root@beaglebone:~/.ssh# ls -al total 20 drwx------ 2 root root 4096 Jul 6 18:32 . <--- .ssh の permission は、700 drwxr-xr-x 7 root root 4096 Jul 7 17:23 .. -rw-r--r-- 1 root root 90 Jul 6 18:31 config -rw------- 1 root root 1676 Jul 6 18:32 id_rsa <--- 秘密鍵の permission は、600 -rw-r--r-- 1 root root 442 Jul 6 18:32 known_hosts
sshでさくっとログインできることを確認。
root@beaglebone:~/rrdtool# ssh mbsrv Last login: Tue Jul 7 13:37:21 from 124.33.???.??? ?????@saigyo.mbsrv.net [~]# logout Connection to 36.3.???.??? closed. root@beaglebone:~/rrdtool#
データ更新を1分毎に、グラフ描画とサーバへのアップロードを5分毎に。
/etc/cron.d/rrdtool
*/1 * * * * root /root/rrdtool/lps331_update.sh */5 * * * * root sleep 10; /root/rrdtool/lps331_graph.sh; rsync -az -e ssh /var/www/rrdtool mbsrv:www
T: Y: ALL: Online:
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