Suresh Susurla
cdms sd card and rtc working
Dependencies: SDFileSystem mbed-src mbed
Revision 0:2e3d21e95c97, committed 2015-03-13
- Comitter:
- sureshsusurla
- Date:
- Fri Mar 13 20:04:05 2015 +0000
- Commit message:
- cdms sd card and rtc working
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.lib Fri Mar 13 20:04:05 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/SDFileSystem/#c8f66dc765d4
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Mar 13 20:04:05 2015 +0000
@@ -0,0 +1,207 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+/************************Include the required Header files for the code *******************************/
+#include "mbed.h"
+#include "string.h"
+
+/********************************** 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
+Serial pc(USBTX, USBRX); // tx, rx
+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 t;
+
+int main()
+{
+ printf("IITMSAT - CDMS\n");
+
+ FUNC_CDMS_init_values();
+ t.attach(&store_data, 20.0);
+ while(1);
+
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-src.lib Fri Mar 13 20:04:05 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-src/#4dac56e9ae44
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Mar 13 20:04:05 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63cdd78b2dc1 \ No newline at end of file