Data logger: Sensors -> Barometer & temperature (BMP180), Humidity & temp. (RHT03), Sunshine (Cds): Display -> 20 chracters x 4 lines: Strage -> EEPROM (AT24C1024): Special functions -> Enter sleep mode to save current, reading the logging data via serial line
Dependencies: AT24C1024 BMP180 M41T62 RHT03 TextLCD WakeUp mbed
Fork of LPC1114_barometer_with_data_logging by
Please refer following Notebook.
http://mbed.org/users/kenjiArai/notebook/mbed-lpc1114fn28-data-logger/
main.cpp
- Committer:
- kenjiArai
- Date:
- 2014-06-29
- Revision:
- 15:065fbeddc305
- Parent:
- 14:18a98cad6109
- Child:
- 16:f164f8912201
File content as of revision 15:065fbeddc305:
/* * mbed Application program for the mbed LPC1114FN28 * Barometer program for only for LPC1114FN28 * * Copyright (c) 2014 Kenji Arai / JH1PJL * http://www.page.sannet.ne.jp/kenjia/index.html * http://mbed.org/users/kenjiArai/ * Created: May 21st, 2014 * Revised: June 28th, 2014 * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* * Function * measure atmospheric pressure and temprerature using Bosch BMP180 pressure sensor * show measured data on AQM0802A LCD and logging such data in EEPROM */ // Include --------------------------------------------------------------------------------------- #include "mbed.h" #include "BMP180.h" // Own lib. / Pressure sensor #include "RHT03.h" // Std. lib./ Humidity sensor #include "TextLCD.h" // Std. lib./ LCD control #include "m41t62_rtc.h" // Own lib. / RTC control #include "dt_log.h" // Definition ------------------------------------------------------------------------------------ #define USE_MON 1 #define USE_BARO 0 #define BOUND 5 // chattering // Define cyclic period #define SHOW_LED 1 // Time for LED on x mS #define CNV_WAIT_T 25 // Waiting time for temp. conversion #define CNV_WAIT_P 50 // Waiting time for pressure conversion #define LOOP_WAIT (1000 - (SHOW_LED + CNV_WAIT_T +CNV_WAIT_P)) // ADC related definition #define VREF_VOLT 2.482 // TA76431F Vref real measued data #define R_FIX 9930 // 10K ohm <- real measued data #define VOL_OFFSET 3 // Offset data ,= real measured data #define CDS_TBL_SIZE 13 // Waiting time #define STATE_CHANGE_TIME 3 typedef enum {CDS = 0, VREF, VOL} ADC_Select; // Object ---------------------------------------------------------------------------------------- Timeout to; // wake-up from sleep() I2C i2c(dp5,dp27); // SDA, SCL DigitalOut myled0(dp28); // LED for Debug DigitalOut myled1(dp14); // Indicate state transition DigitalOut analog_pwr(dp6); // VCC for analog interface (vol, cds and vref) DigitalOut vref_pwr(dp4); // VCC for Vref DigitalIn sw_chng(dp1,PullUp);// SW for select DigitalIn sw_mode(dp2,PullUp);// SW for Mode change AnalogIn cds(dp11); // Input / CDS data AnalogIn vref(dp9); // Input / Bandgap 2.5V AnalogIn vol(dp10); // Input / contrast volume RHT03 humtemp(dp26); // RHT03 interface BMP180 bmp180(i2c); // Bosch sensor M41T62 m41t62(i2c); // STmicro RTC(M41T62) TextLCD_I2C_N i2clcd(&i2c, 0x7c, TextLCD::LCD8x2); // LCD(Akizuki AQM0802A) // Function prototypes --------------------------------------------------------------------------- extern int mon( void); // only use for debug purpose // RAM ------------------------------------------------------------------------------------------- int flag; // ADC float av_cds, av_vref, av_vol, cal_vcc; float r_cds, lux; uint32_t nor_vol; // Humidity Sensor float humidity_temp, humidity; // EEPROM uint8_t eep_buf[256 + 2]; // Barometer float baro; float baro_temp; // EEPROM extern xEeprom_ptr log_inf; // ROM / Constant data --------------------------------------------------------------------------- // Cds GL5528 (Dark Resistance 1 Mohm type) SENBA OPTICAL & ELECTRONIC CO.,LTD. // Table value referrence: http://homepage3.nifty.com/skomo/f35/hp35_20.htm const float lux_cds[CDS_TBL_SIZE][2] = {{50,21194},{100,8356},{200,3294},{400,1299},{800,512},{1600,202},{3200,79.6},{6400,31.4}, {12800,12.4},{25600,4.88},{51200,1.92},{102400,0.758},{409600,0.118}}; // LCD screen data enum Screen{ SCRN_Clear=0, SCRN_Opening, SCRN_Goto_mon, SCRN_Backto_normal }; // Clear Opening Goto_mon Backto_normal char scrn_1st[4][10] = { " ", "LPC1114F", "GOTO MON", "Back to"}; char scrn_2nd[4][10] = { " ", " JH1PJL ", " 9600BPS", " Normal"}; // Disply on LCD enum Disp_num{ DSP_INIT=0, DSP_BARO, DSP_HUMD, DSP_LUX, DSP_TIME, DSP_LOG, DSP_RTURN }; // rule 1) DSP_INIT is top position, 2)DSP_RTURN is end position, 3) Total number 20 const uint8_t lcd_disp_tbl[20] // 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, = {DSP_INIT, DSP_BARO, DSP_BARO, DSP_BARO, DSP_TIME, DSP_TIME, DSP_HUMD, DSP_HUMD, DSP_LUX, DSP_LUX, // 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 DSP_BARO, DSP_BARO, DSP_TIME, DSP_TIME, DSP_HUMD, DSP_HUMD, DSP_LUX, DSP_LUX, DSP_LOG, DSP_RTURN}; //------------------------------------------------------------------------------------------------- // Control Program //------------------------------------------------------------------------------------------------- // Normalize ADC data void adc_normalize (ADC_Select n){ int i; float x1,y1,dx; switch (n){ case CDS: // v_adc = Rfix / (Rcds + Rfix) -> Rcds = ( Rfix / v_adc ) - Rfix r_cds = (R_FIX / av_cds) - R_FIX; // CDS resistance to Lux conversion using convertion table (luc_cds[][]) for (i =0; i < CDS_TBL_SIZE; i++){ // search table if ( r_cds <= lux_cds[i][0]){ break; } } // Check table position if (i == 0){ lux = lux_cds[0][1]; break; } else if ( i == CDS_TBL_SIZE ){ if ( r_cds <= lux_cds[i][0] ){ lux = lux_cds[i-1][1]; break; } } // Linear interpolation y1 = lux_cds[i-1][1] - lux_cds[i][1]; x1 = lux_cds[i][0] - lux_cds[i-1][0]; dx = r_cds - lux_cds[i-1][0]; lux = lux_cds[i-1][1] - ((dx/x1) * y1); break; case VREF: // vref = VREF_VOLT / VCC -> VCC = VREF_VOLT / vref cal_vcc = VREF_VOLT / vref; break; case VOL: // Vol center = 1.00 (actual 100) nor_vol = (uint32_t)(av_vol * 200) + VOL_OFFSET; break; } } // Read adc data and averaging void adc_all_read (void){ if (av_cds == 0){ av_cds = cds.read(); } else { av_cds = av_cds *0.5 + cds.read() * 0.5; } if (av_vref == 0){ av_vref = vref.read(); } else { av_vref = av_vref *0.9 + vref.read() * 0.1; } if (av_vol == 0){ av_vol = vol.read(); } else { av_vol = av_vol *0.2 + vol.read() * 0.8; } } // Read Humidity sensor data void hum_RHT03_read (void){ while (true){ // wait data if ( humtemp.readData() == RHT_ERROR_NONE ){ break; } } if (humidity_temp == 0){humidity_temp = humtemp.getTemperatureC(); } else { humidity_temp = humidity_temp * 0.9 + humtemp.getTemperatureC() * 0.1; } if ( humidity == 0 ){ humidity = humtemp.getHumidity(); } else { humidity = humidity * 0.9 + humtemp.getHumidity() * 0.1; } } void set_lcd_screen(int n){ i2clcd.locate(0, 0); i2clcd.printf("%s", scrn_1st[n]); i2clcd.locate(0, 1); i2clcd.printf("%s", scrn_2nd[n]); } //------------------------------------------------------------------------------------------------- // Application program //------------------------------------------------------------------------------------------------- // Nothing is done but just wake-up from sleep condition void wakeup() { flag = 1; myled1 = !myled1; } // Measure pressure and show it on LCD void conv_and_disp(void) { tm t; uint32_t step = 0; uint8_t num; while (true) { // infinit loop for measure and display // Call wakeup()function after specific time to.attach(&wakeup, STATE_CHANGE_TIME); // this is for wake-up //---- State Control ---- num = lcd_disp_tbl[step++]; switch (num){ // ---------- Initialize data ---------------------------------------------------------------- case DSP_INIT: av_cds = 0; av_vref = 0; av_vol = 0; humidity_temp = 0; humidity = 0; // RTC m41t62.set_sq_wave(RTC_SQW_NONE); break; // ---------- Cds Sensor, Vref, Volume ------------------------------------------------------- case DSP_LUX: // Power on / Analog sensor analog_pwr = 1; vref_pwr = 1; wait(0.2); adc_all_read(); // Power off / Analog sensor analog_pwr = 0; // Normalize adc_normalize(CDS); adc_normalize(VREF); adc_normalize(VOL); set_lcd_screen(SCRN_Clear); i2clcd.locate(0, 0); // 1st line top // 12345678 i2clcd.printf("L:%.1f", lux); i2clcd.locate(0, 1); // 2nd line top i2clcd.printf("V:%.3f", cal_vcc); break; // ---------- Barometer Sensor / BMP180 ------------------------------------------------------ case DSP_BARO: bmp180.normalize(); baro = bmp180.read_pressure(); baro_temp = bmp180.read_temperature(); set_lcd_screen(SCRN_Clear); i2clcd.locate(0, 0); // 1st line top i2clcd.printf("P:%.1f", baro); i2clcd.locate(0, 1); // 2nd line top i2clcd.printf("T:%\+-6.1f", baro_temp); break; // ---------- Humidity Sensor / RHT03 -------------------------------------------------------- case DSP_HUMD: hum_RHT03_read(); // Read Humidity data then avaraging set_lcd_screen(SCRN_Clear); i2clcd.locate(0, 0); // 1st line top i2clcd.printf("H:%.1f", humidity); i2clcd.locate(0, 1); // 2nd line top i2clcd.printf("T:%\+-6.1f", humidity_temp); break; // ---------- RTC ---------------------------------------------------------------------------- case DSP_TIME: m41t62.read_rtc_std(&t);; set_lcd_screen(SCRN_Clear); i2clcd.locate(0, 0); // 1st line top i2clcd.printf("%02d/%02d/%02d", t.tm_year % 100, t.tm_mon + 1, t.tm_mday); i2clcd.locate(0, 1); // 2nd line top i2clcd.printf("%02d:%02d:%02d", t.tm_hour, t.tm_min, t.tm_sec); break; // ---------- EEPROM Logging ----------------------------------------------------------------- case DSP_LOG: dtlog_data_pack(); // Get EEPROM resource dtlog_one_write(); // Write data to EEPROM set_lcd_screen(SCRN_Clear); i2clcd.locate(0, 0); // 1st line top i2clcd.printf("Logging"); i2clcd.locate(0, 1); // 2nd line top i2clcd.printf("%d.1", dtlog_buf_occupation() / 10); break; // ---------- return (loop) ------------------------------------------------------------------ case DSP_RTURN: default: // <State> State change step = 1; // if something wrong, go to reset condition } // ---------- back to top -------------------------------------------------------------------- myled0 = !myled0; while (flag == 0){ wait(0.01);} wait(0.1); myled1 = !myled1; flag = 0; } } // Application program starts here int main() { flag = 0; i2clcd.setContrast(25); set_lcd_screen(SCRN_Opening); if (sw_chng == 0){ // SW ON //-- Enter Monitor Mode -- myled1 = 1; wait(0.5); myled1 = 0; wait(0.5); myled1 = 1; wait(0.5); if (sw_chng == 0){ // Still SW ON myled1 = 0; wait(0.5); myled1 = 1; wait(0.5); if (sw_mode == 0){ // SW ON set_lcd_screen(SCRN_Clear); set_lcd_screen(SCRN_Goto_mon); myled1 = 0; mon(); // mon.cpp } set_lcd_screen(SCRN_Clear); set_lcd_screen(SCRN_Backto_normal); } } //-- Enter Normal Mode -- myled0 = 1; myled1 = 0; while (true) { // Start main program conv_and_disp(); } }