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i2c+sd+rtc , ported untested code , working probability 90% if i2c works
Dependencies: SDFileSystem mbed-rtos mbed-src mbed
Fork of cdms_SD_rtc by
main.cpp
- Committer:
- raizel_varun
- Date:
- 2015-04-10
- Revision:
- 1:59da9694681e
- Parent:
- 0:2e3d21e95c97
File content as of revision 1:59da9694681e:
#include "mbed.h" #include "SDFileSystem.h" /************************Include the required Header files for the code *******************************/ #include "mbed.h" #include "string.h" #include "rtos.h" #include "pin_config.h" const int addr = 0x20; //slave address I2C master (PIN72,PIN71); //configure pins p27,p28 as I2C master Serial pc (USBTX,USBRX); DigitalOut interrupt(PIN4); InterruptIn data_ready(PIN39); int reset; Timer t; Timer t1; Timer t2; Timer t3; typedef struct { char data; // To avoid dynamic memory allocation int length; }i2c_data; //Mail<i2c_data,16> i2c_data_receive; Mail<i2c_data,16> i2c_data_send; Thread * ptr_t_i2c; void FUNC_I2C_MASTER_FSLAVE(char * data,int length) { bool ack0 =true; interrupt = 1; t1.start(); //wait_ms(20); ack0 = master.read(addr|1,data,length); t1.stop(); if(!ack0) { printf("\n master has read %s from slave\n\r",data); } //master.stop(); printf("\n%d\n\r",t1.read_us()); t1.reset(); interrupt=0; } typedef struct { char Voltage[9]; char Current[5]; char Temperature[2]; char PanelTemperature[3];//read by the 4 thermistors on solar panels char BatteryTemperature; //to be populated char faultpoll; //polled faults char faultir; //interrupted faults char power_mode; //power modes char AngularSpeed[3]; char Bnewvalue[3]; //float magnetometer,gyro=>to be addes } hk_data; hk_data decode_data; /*void TC_DECODE(char *data_hk) //getting the structure back from hk data sent by bae { for(int i=0;i<=7;i++) { decode_data.Voltage[i] = data_hk[i]; decode_data.Voltage[8] = '\0'; } for(int i=0;i<=3;i++) { decode_data.Current[i] = data_hk[8+i]; decode_data.Current[4] = '\0'; } decode_data.Temperature[0] = data_hk[12]; decode_data.Temperature[1] = '\0'; for(int i=0;i<=1;i++) { decode_data.PanelTemperature[i] = data_hk[13+i]; decode_data.PanelTemperature[2] = '\0'; } decode_data.BatteryTemperature = data_hk[15]; decode_data.faultpoll = data_hk[16]; decode_data.faultir = data_hk[17]; decode_data.power_mode = data_hk[18]; for(int i=0;i<=1;i++) { decode_data.AngularSpeed[i] = data_hk[19+i]; decode_data.AngularSpeed[2] = '\0'; } for(int i=0;i<=1;i++) { decode_data.Bnewvalue[i] = data_hk[21+i]; decode_data.Bnewvalue[2] = '\0'; } printf("\n voltage %s\n\r",decode_data.Voltage); printf("\n current %s\n\r",decode_data.Current); printf("\n faultpoll %c\n\r",decode_data.faultpoll); }*/ void T_I2C_MASTER_FSLAVE(void const *args) { char data_receive[25]; while(1) { Thread::signal_wait(0x1); FUNC_I2C_MASTER_FSLAVE(data_receive,25); /*i2c_data * i2c_data_r = i2c_data_receive.alloc(); strcpy(i2c_data_r->data , data_receive); i2c_data_r->length = 25; i2c_data_receive.put(i2c_data_r);*/ printf("\n Data received from slave is %s\n\r",data_receive); //TC_DECODE(data_receive); } } void FUNC_INT() { ptr_t_i2c->signal_set(0x1); } char writedata; bool write2slave; bool master_status_write; void FUNC_MASTER_WRITE() { //wait(1); write2slave=true; char data = pc.getc(); interrupt = 1; t.start(); t3.start(); wait_ms(20); i2c_data * i2c_data_s = i2c_data_send.alloc(); i2c_data_s->data = data; i2c_data_s->length = 1; i2c_data_send.put(i2c_data_s); master_status_write = true; // interrupt = 1; osEvent evt = i2c_data_send.get(); if (evt.status == osEventMail) { i2c_data *i2c_data_s = (i2c_data*)evt.value.p; writedata = i2c_data_s -> data; t.stop(); //t3.start(); master_status_write = (bool) master.write(addr|0x00,&writedata,1); t3.stop(); if(master_status_write==0) { printf("master has written %c to slave\n\r",writedata); write2slave=false; } i2c_data_send.free(i2c_data_s); printf("\n%d\n",t.read_us()); t.reset(); printf("\n%d\n",t3.read_us()); t3.reset(); } interrupt = 0; } /********************************** Function Prototypes declaration ***********************************/ int FUNC_CDMS_hex2int(int); // Need to convert the RTC time values to integers void FUNC_CDMS_Gettime(void); // Function to get the time values from RTC registers void FUNC_CDMS_init_values(void); // Function to initialize the registers in the RTC /***************** Configure the SPI1 of the CDMS uc as the data bus for the RTC***********************/ SPI spi(PTE1,PTE3, PTE2); // mosi, miso, sclk DigitalOut cs(PTE29); // PTE29 is used for chip select char ch; SDFileSystem sd(PTE1, PTE3, PTE2, PTE22, "sd"); // the pinout on the mbed Cool Components workshop board char time_stamp[15]; /***********************Initialization function of the RTC********************************************/ void FUNC_CDMS_init_values(void) { cs=0; spi.format(8,3); // Set the data bit with to be of 8 bits, // data tx mode is 3 spi.frequency(1000000); // Set Data rate to be 1 MHz cs = 0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x80); // Send the address of the Seconds register 0x80 spi.write(0x00); // Set seconds value to 0 cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x81); // Send the address of the Minutes register 0x81 spi.write(0x00); // Set minutes value to 0 cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x82); // Send the address of the Hours register 0x82 spi.write(0x00); // Set hours value to 0 cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x83); // Send the address of the Day register 0x83 spi.write(0x01); // Set the day to 01 cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x84); // Send the address of the date register 0x84 spi.write(0x01); // Set date of the month to 01 cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x85); // Send the address of the Month register 0x80 spi.write(0x01); // Set month to 01 cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x86); // Send the address of the year register 0x80 spi.write(0x00); // Set year to 00(2000) cs=1; // Set chip select pin to be 1: DeActivate RTC chip }// End of INIT Function /*********************************Function to read the RTC registers*********************************/ void FUNC_CDMS_Gettime() { spi.format(8,3); // Set the data bit with to be of 8 bits, // data tx mode is 3 spi.frequency(1000000); // Set Data rate to be 1 MHz cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x00); // Sending address of seconds register int seconds = spi.write(0x00); // Read the value by sending dummy byte cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x01); // Sending address of Minutes register int minutes =spi.write(0x01); // Read the value by sending dummy byte cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x02); // Sending address of hours register int hours =spi.write(0x01); // Read the value by sending dummy byte cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x03); // Sending address of day register int day =spi.write(0x01); // Read the value by sending dummy byte cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x04); // Sending address of date register int date =spi.write(0x01); // Read the value by sending dummy byte cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x05); // Sending address of month register int month =spi.write(0x01); // Read the value by sending dummy byte cs=1; // Set chip select pin to be 1: DeActivate RTC chip cs=0; // Set chip select pin to be 0: Activate RTC chip spi.write(0x06); // Sending address of year register int year =spi.write(0x01); // Read the value by sending dummy byte cs = 1; // Set chip select pin to be 1: DeActivate RTC chip // RTC sends in BCD format.. SO we convert the values generated by RTC to integers year = FUNC_CDMS_hex2int(year); month = FUNC_CDMS_hex2int(month); date = FUNC_CDMS_hex2int(date); day = FUNC_CDMS_hex2int(day); hours = FUNC_CDMS_hex2int(hours); minutes = FUNC_CDMS_hex2int(minutes); seconds = FUNC_CDMS_hex2int(seconds); // Print the obtained Time stamp //printf("The time is :%d %d %d %d %d %d %d \n\r",seconds,minutes,hours,day,date,month,year); sprintf(time_stamp,"%02d%02d%02d%02d%02d%02d",year,month,date,hours,minutes,seconds); printf(" \n\r Received HK data from BAE"); printf("\n HK_data stored in %s.txt",time_stamp); //puts(time_stamp); //printf(".txt"); }//End of Read Function /**************************Function to convert Hex values to Int values*****************************/ int FUNC_CDMS_hex2int(int a) { a=(a/16)*10+(a%16); //function to convert hex type to int type return a; }// End of convert function /******************************************END OF RTC CODE ****************************************/ char count = 10; void store_data() { FUNC_CDMS_Gettime(); char hk_data[25]; count++; strcpy(hk_data,"hk_Data "); strcat(hk_data,"!@@#"); hk_data[10] = count; //storedata(hk_data); mkdir("/sd/hk", 0777); char add[20]; strcpy(add,"/sd/hk/"); strcat(add,time_stamp); strcat(add,".txt"); FILE *fp = fopen(add, "w"); if(fp == NULL) { error("Could not open file for write\n"); } else { fprintf(fp, "%s ",hk_data); fclose(fp); printf("\n File stored in SD card\n"); //printf("\n Reading from the file .... \n Data is %s\n",hk_data); } } //void create_file() //{ /* fprintf(fp, "Hello fun SD Card World!\n"); fclose(fp); fp = fopen("/sd/mydir/sdtest.txt", "r"); if(fp == NULL) { error("Could not open file for write\n"); } //fprintf(fp, "Hello fun SD Card World!"); // fprintf("The contents of %s file are :\n", "/sd/mydir/sdtest.txt"); while( ( ch = fgetc(fp) ) != '\n' ) { pc.printf("%c",ch); } //fprintf(fp); fclose(fp); printf("Jai Mata Di..Goodbye World!\n");*/ //} Ticker tx; int main() { interrupt=0; ptr_t_i2c = new Thread(T_I2C_MASTER_FSLAVE); master.frequency(100000); printf("IITMSAT - CDMS\n"); FUNC_CDMS_init_values(); tx.attach(&store_data, 20.0); while(1) { FUNC_MASTER_WRITE(); } }