Version 3.0: Switching to newer LDC1614 which is placed on the same PCB.
Dependencies: Bob DS1825 LDC1614 LDC1101 SDFileSystem mbed
Fork of Inductive_Sensor by
main.cpp
- Committer:
- bobgiesberts
- Date:
- 2016-09-10
- Revision:
- 19:c0707d20bada
- Parent:
- 17:a4700b1c3c37
- Child:
- 20:1c5ea04a3b2a
File content as of revision 19:c0707d20bada:
/** * @file main.cpp * @brief This file programs the processor for the inductive force sensor * using the library LDC1614.h and LDC1614.cpp. * - Green Led: processing communication with LDC1614 * - Red Led: error * * Log protocol: * - 0:30 minutes at 13 Hz * - 14:30 minutes rest * * @author Bob Giesberts * * @date 2016-08-23 */ #include "mbed.h" #include "LDC1614.h" // inductive force sensor #include "SDFileSystem.h" // control the SD card #include "Bob.h" // processorboard #include "DS1825.h" // thermometer #include <iostream> #include <vector> #include <string> using namespace std; bool DEBUG = true; // SETTINGS float C = 120E-12; // Capacitor in F int sensors = 1; // number of attached sensors uint16_t INTERVAL_FIRST = 3600; // First sampling time in seconds. 60:00 minutes = 3600 sec uint16_t INTERVAL_OFF = 870; // Waiting interval in seconds. 14:30 minutes = 870 sec (14*60+30) uint16_t INTERVAL_ON = 30; // Sampling interval in seconds. 0:30 minutes = 30 sec // Leds PinName _LED_PROCESS = PTB1; // Green led (PTB0 for the first sensor) // old = new: PTB1 PinName _LED_ERROR = PTB0; // Red led // new: PTB0; // Thermometer PinName _Tpin = PTC1; // OneWire system (PTB1 for the first sensor) // old = PTB0, new: PTC1 // LDC1614 PinName _LDC_SDA = PTC5; // I2C: SDA PinName _LDC_SCL = PTC4; // I2C: SCL PinName _LDC_SD = PTC6; // Shutdown // SD File system PinName _SD_PRESENT = PTE0; // card detect // old = new: PTE0 PinName _SD_MOSI = PTD6; // mosi // old = new: PTD6 PinName _SD_MISO = PTD7; // miso // old = new: PTD7 PinName _SD_SCLK = PTD5; // sclk // old = new: PTD5 PinName _SD_CS = PTD4; // cs // old = new: PTD4 // Other components PinName _ENABLE = PTC3; // enables SD card and Crystal PinName _BATTERY = PTC2; // voltage // old = new: PTC2 PinName _BUTTON = PTA4; // load libraries Bob bob( _LED_PROCESS, _LED_ERROR, _BUTTON, _ENABLE, _SD_PRESENT, _BATTERY ); Serial pc( USBTX, USBRX ); // timer variables uint32_t now = 0, next = 0, prev = 0; uint8_t t_high = 0; uint32_t t_lost = 0, lost_prev = 0; uint8_t lost_high = 0; uint32_t t_sleep = 0; uint32_t t; // file variables FILE *fp; string filename = "/sd/data00.txt"; const char *fn; // temperature variables uint8_t Tdata[9]; int16_t T_bin; float T; // temporal storage for data samples const uint8_t package_size = 60; // ±12-13 Hz, so 60 would take about 5 sec. struct mydata { uint32_t t[package_size]; // time (s) uint32_t L[package_size]; // LHR_DATA } collected; uint8_t counter = 0; uint8_t status; // function to write all data to the SD card void storeit( float T ) { // TODO: writing to SD card more efficient! // t 32-bit | 0.00 2000000.00 3-10x8-bit | FFFFFFFF 8x8 // L 24-bit | 0 1677216 6- 7x8-bit | FFFFFF 6x8 // V 8-bit | 3.10 4.20 4x8-bit | FF 2x8 // T 16-bit | -20.0000 85.0000 7x8-bit | FFFF 4x8 // construct data /* bob.processing(); // fp = fopen( fn, "a" ); // open file (append) char buffer[16]; memset(buffer, 0, sizeof(buffer)); char towrite[64]; memset(towrite, 0, sizeof(towrite)); int n = 0, m = 0; for( int i = 0; i < counter; i++ ) { for( int j = 0; j < 4; j++ ) { // build up next 'word' switch(j) { case 0: n = sprintf(buffer, "%.2f;", (float) collected.t[i]/100.0); break; case 1: n = sprintf(buffer, "%d;", collected.L[i]); break; case 2: n = sprintf(buffer, "%.2f;", bob.battery()); break; case 3: n = sprintf(buffer, "%.4f\r\n", T); break; } // calculate if there is still room left for that word if( strlen(towrite) + n > 64 ) { // pc.printf( "%s", towrite); fp = fopen( fn, "a" ); // open file (append) fprintf( fp, "%s", towrite); fclose( fp ); // close file memset(towrite, 0, sizeof(towrite)); } // build up letter with the next word m = sprintf(towrite, "%s%s", towrite, buffer); } } if(m > 0) { fp = fopen( fn, "a" ); // open file (append) fprintf( fp, "%s", towrite); fclose( fp ); // close file //pc.printf( "%s", towrite); } //fclose( fp ); // close file bob.no_processing(); */ // write data to SD card bob.processing(); fp = fopen( fn, "a" ); // open file (append) for( int i = 0; i < counter; i++ ) fprintf( fp, "%.2f;%d;%.2f;%.4f\r\n", (float) collected.t[i]/100.0, collected.L[i], bob.battery(), T ); // write to file fclose( fp ); // close file // write to screen //pc.printf( "%.2f;%d;%.2f;%.4f\r\n", (float) collected.t[counter-1]/100.0, collected.L[counter-1], bob.battery(), T ); // write to screen bob.no_processing(); // Reset data memset(collected.t, 0, counter); memset(collected.L, 0, counter); counter = 0; } int main(void) { if( DEBUG ) { bob.wakeup_periphery( ); LDC1614 ldc( _LDC_SDA, _LDC_SCL, _LDC_SD, 16E6, sensors, C ); while( 1 ) { for(int sensor = 0; sensor < sensors; sensor++) { // wait for a new conversion to be ready while( !ldc.is_ready( sensor ) ) { } // get error information from ldc.get_Data because // it is not stored in ldc.get_status as soon as // ldc.is_ready == true // write data to screen pc.printf( "%d\r\n", ldc.get_Data( sensor ) ); } // wait(0.5); } } // TODO: // - implement this data conversion in writing to SD!! // - use T as uint16_t, not float! // - use V as uint16_t, not float! // - write blocks of 512 bit (4x 32 + 32 + 16 + 16) // // float temp_a = 127.9375; // pc.printf( "A: %.4f (%08x); \r\n", temp_a, * (uint32_t *) &temp_a); // Load SD File system // - the Raspberry Pie SD cards give a warning here that might just be ignored: // "Not in idle state after sending CMD8 (not an SD card?) // Didn't get a response from the disk // Set 512-byte block timed out" // TODO: buy 'better' SD cards from IAPC / the Stores (Kingston ...) // This turns enable on, i.e. it powers the SD card system, the crystal and the LDC bob.wakeup_periphery(); // load SD File System SDFileSystem *sd = new SDFileSystem( _SD_MOSI, _SD_MISO, _SD_SCLK, _SD_CS, "sd" ); // Create a new data file (data00.txt) mkdir("/sd", 0777); for(uint8_t i = 0; i < 100; i++) { filename[8] = i/10 + '0'; filename[9] = i%10 + '0'; fp = fopen( filename.c_str() , "r" ); if( fp == NULL ) // read failed so file does not exist { fp = fopen( filename.c_str(), "w" ); // create it if( fp != NULL ) { fn = filename.c_str(); fclose( fp ); break; } else { bob.error(); // error: unable to create new file } } else { // file already exists fclose( fp ); } } if( fp == NULL ) { bob.error(); // error: file 00 - 99 already exists // pc.printf( "/sd/data00.txt t/m /sd/data99.txt already exist!\n" ); } // Unload SD File system delete sd; sd = NULL; while(1) { // what time is it now? prev = now; // 0 -> 429 496 --> (4 294,96 s) (71 min) now = (uint32_t) clock(); // 0 -> 429 496 --> (4 294,96 s) (71 min) if( now < prev ) t_high++; // 0 -> 255 --> (255*4 294,96 s) (12 days) t = now + 429496.7296*t_high + t_lost + 429496.7296*lost_high; // 0 -> 219 901 952 --> (2 199 019,52 s) (25 days) // How long should we takes samples? next = t + ( (next == 0) ? INTERVAL_FIRST : INTERVAL_ON )*100; // 0 -> 219 904 952 --> (2 199 049,52 s) (25 days) // Wakeup the periphery (SD, crystal and LDC1614 on) bob.wakeup_periphery(); // load libraries to take control over the communication LDC1614 *ldc = new LDC1614(_LDC_SDA, _LDC_SCL, _LDC_SD, 16E6, sensors, C); // load LDC1614 libray DS1825 *thermometer = new DS1825( _Tpin ); // load thermometer (DS1825) library SDFileSystem *sd = new SDFileSystem(_SD_MOSI, _SD_MISO, _SD_SCLK, _SD_CS, "sd"); // load SD File System library mkdir("/sd", 0777); // select folder // Take samples for INTERVAL_ON seconds while( t < next ) { // what time is it now? prev = now; now = (uint32_t) clock(); if( now < prev ) t_high++; t = now + 429496.7296*t_high + t_lost + 429496.7296*lost_high; status = ldc->get_status(); // Is there any error? if( ldc->is_error(status) ) { // red led on bob.error(); }else{ // red led off bob.no_error(); if( ldc->is_ready(status) ) // data from all sensors is ready { // Store data in temporal memory collected.t[counter] = t; collected.L[counter] = ldc->get_Data( 0 ); counter++; // Write a full package of data points to the SD card if( counter >= package_size-1 ) storeit( thermometer->getTemperature() ); } } } // Write remaining data to the SD card if( counter > 0 ) storeit( thermometer->getTemperature() ); // prepare for sleep: delete and power down the periphery (SD, crystal and LDC1614) delete sd; sd = NULL; // unload library to be able to power down completely delete ldc; ldc = NULL; // unload library to be able to power down completely delete thermometer; thermometer = NULL; // unload library to be able to power down completely bob.shutdown_periphery(); // if the battery is almost empty (Vbatt < 3.10 V), the thermometer stops // working well and L can not be corrected. So just shut down... if( bob.battery() < 3.10f ) { bob.error(); // error: battery empty // pc.printf( "Battery empty (%.1f V), shutting down.\n", bob.battery() ); exit(0); } // what time is it now? prev = now; now = (uint32_t) clock(); if( now < prev ) t_high++; t = now + 429496.7296*t_high + t_lost + 429496.7296*lost_high; // Calculate sleeping time (correction to INTERVAL_OFF) // t has passed the limit of next. Those few ms are substracted from INTERVAL_OFF. t_sleep = INTERVAL_OFF*100 - (t - next); // Calculate time that will be lost during sleep lost_prev = t_lost; t_lost += t_sleep; if( t_lost < lost_prev ) lost_high++; // Sleep now (ms), enter low power mode bob.sleep( t_sleep * 10 ); } }