![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
lab 7
Dependencies: SDFileSystem mbed
Diff: software_osc.cpp
- Revision:
- 0:f6d3b930f382
diff -r 000000000000 -r f6d3b930f382 software_osc.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/software_osc.cpp Sat Dec 10 21:08:30 2016 +0000 @@ -0,0 +1,156 @@ +#include "stdio.h" +#include "stdint.h" +#include "mbed.h" +#include "Freedom_headers.h" + +#define USE_PC TRUE +/* UNCOMMENT THE FOLLOWING LINE TO ENABLE SD CARD FILESYSTEM VIA DEFAULT SPI */ +#define USE_SD_CARD TRUE +/* UNCOMMENT THE FOLLOWING LINE TO ENABLE DS1307 REAL-TIME CLOCK VIA IIC */ +#define USE_DS1307 TRUE +/* UNCOMMENT THE FOLLOWING LINE TO ENABLE SIMPLE FIFO FUNCTIONS */ +#define USE_SIMPLE_FIFO TRUE + +#ifdef USE_PC +Serial pc(USBTX,USBRX); + +#ifdef USE_SD_CARD +#include "SDFileSystem.h" +#define SD_MOSI PTD6 +#define SD_MISO PTD7 +#define SD_SCK PTD5 +#define SD_CS PTD4 +char sd_root_name[]="sd"; +char filename[80]; +SDFileSystem sd(SD_MOSI, SD_MISO, SD_SCK, SD_CS, sd_root_name); /* MOSI,MISO,SCK,CS, "Name of directory structure" */ + +#endif /* #ifdef USE_SD_CARD*/ + +#ifdef USE_DS1307 +#include "EE3420_time.h" + +#endif /* #ifdef USE_DS1307*/ + +#ifdef USE_SIMPLE_FIFO + +/* comment out the folloing definitions to use the library defaults */ +#define SIMPLE_FIFO_SIZE 32 + +#include "simple_fifo.h" + +#endif /* #ifdef USE_SIMPLE_FIFO*/ + +FIFO_FLOAT scope_data; +int samples_active=0; +float voltage_level; +float ftemp; +char timestr[80]; + +int sample_count=0; + +AnalogIn voltage_sensor(PTB0); +InterruptIn left_button(PTC12); /* button labeled SW3, wired active-low needing pull-up */ +Ticker t; +#define SAMPLE_FREQUENCY 5000.0 + +void take_sample() +{ + if(samples_active==1) + { + voltage_level=voltage_sensor.read(); + /*if(fifo_float_writable(&scope_data)) + { + fifo_float_write(&scope_data,voltage_level); + } + else + { + printf("fifo overrun\n"); + samples_active=0; + }*/ + + + sample_count++; + } + if(sample_count>= 2000) + { + samples_active=0; + } +} + +void start_sample() +{ + if(samples_active==0) + { + fifo_float_init(&scope_data); + sample_count=0; + samples_active=1; + } + else + { + samples_active=0; + } + +} + +int main() +{ + +#ifdef USE_PC + pc.baud(115200); /* set serial port speed to 115200 - must be matched in terminal emulator */ +#endif +#ifdef USE_SLCD + slcd.All_Segments(0); +#endif +#ifdef USE_CHARACTER_LCD + character_lcd_initialize(); +#endif + + fifo_float_init(&scope_data); + +#ifdef USE_PC + pc.printf("\n"); +#endif + + get_DS1307_time(&EE3420_DS1307_data); + set_KL46Z_RTC_from_DS1307(); + + sprintf(filename,"/sd/voltage.csv"); + + FILE *fp = fopen(filename, "w"); + if(fp == NULL) + { + error("Could not open file ""%s"" for write\n", filename); + } + fprintf(fp,"date, time, scopes\n"); + fclose(fp); + + samples_active=0; + + left_button.mode(PullUp); + left_button.fall(&start_sample); + + t.attach(&take_sample,1.0/SAMPLE_FREQUENCY); + +while(true) +{ + + if(fifo_float_readable(&scope_data)) + { + + fp = fopen(filename, "a"); + while(fifo_float_readable(&scope_data)) + { + //get_DS1307_time(&EE3420_DS1307_data); + //format_time_string_24(&EE3420_DS1307_data, timestr); + fifo_float_read(&scope_data,&ftemp); + //fprintf(fp, "20%02i/%02i/%02i, %02i:%02i:%02i, %f\n",EE3420_DS1307_data.year,EE3420_DS1307_data.month, + //EE3420_DS1307_data.day,EE3420_DS1307_data.hours,EE3420_DS1307_data.min,EE3420_DS1307_data.sec,ftemp); + fprintf(fp, "%f\n",ftemp); + pc.printf("%f\n",ftemp); + } + fclose(fp); + } +} +} //end of main() + +