Revision 0:071d67158a06, committed 2016-07-05

Comitter:

chaithanyarss

Date:

Tue Jul 05 10:10:16 2016 +0000

Commit message:

RTC standalone

Changed in this revision

diff -r 000000000000 -r 071d67158a06 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jul 05 10:10:16 2016 +0000
@@ -0,0 +1,191 @@
+#include "mbed.h"
+
+DigitalOut gpo(D0);
+DigitalOut led(LED_RED);
+Serial gPC( USBTX, USBRX );
+// COMMON SPI
+#define SPI_MOSI PTE1
+#define SPI_MISO PTE3
+#define SPI_CLK PTE2
+#define SPI_CS_RTC PTE29
+SPI spi( SPI_MOSI, SPI_MISO, SPI_CLK );
+
+DigitalOut gCS_RTC(SPI_CS_RTC);
+
+DigitalOut CDMS_LED1(PTB7);
+DigitalOut CDMS_LED2(PTB17);
+DigitalOut CDMS_LED3(PTB16);
+DigitalOut CDMS_LED4(PTB11);
+
+void FCTN_CDMS_INIT_RTC()
+{
+    gCS_RTC=1;
+    spi.format(8,0);
+    spi.frequency(1000000);
+    //clearing the halt bit 
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x8C);
+    spi.write(0x00);
+     
+    //clearing the OF bit 
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x8F);
+    spi.write(0x00);
+     
+    //century bits
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x80|0x03);
+    spi.write(0x00);
+ 
+    //Kick starting the oscillator 
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x81); //register address with write flag
+    spi.write(0x80);//enabling stop bit in the seconds register
+ 
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x81);
+    spi.write(0x00);//disabling the stop bit to restart the oscillator 
+ 
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x80); 
+    spi.write(0x01); // set milliseconds value to 00
+    gCS_RTC=1;
+ 
+    gCS_RTC=0;
+    spi.write(0x81); 
+    spi.write(0x01); //set seconds value to 00
+    gCS_RTC=1;
+ 
+    gCS_RTC=0;
+    spi.write(0x82); 
+    spi.write(0x01);//set minutes value to 00
+    gCS_RTC=1;
+ 
+    gCS_RTC=0;
+    spi.write(0x83); 
+    spi.write(0x23); //set the hours to 01
+    gCS_RTC=1;
+    
+    gCS_RTC=0;
+    spi.write(0x84); 
+    spi.write(0x01); //set day of the week to 01
+    gCS_RTC=1;
+    
+    gCS_RTC=0;
+    spi.write(0x85); 
+    spi.write(0x31); //set date of the month to 01
+    gCS_RTC=1;
+    
+    gCS_RTC=0;
+    spi.write(0x86); 
+    spi.write(0x12); //set month to 01
+    gCS_RTC=1;
+    
+    gCS_RTC=0;
+    spi.write(0x87); 
+    spi.write(0x01); //set year to 00(2000)
+    gCS_RTC=1;
+    gPC.puts("\n\r rtc initalised \n");
+
+}
+ 
+uint64_t FCTN_CDMS_RD_RTC()
+{    
+    uint8_t response;
+    //printf("\n\r Entered rtc\n");
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x00); //reading milliseconds register
+    response = spi.write(0x00); // read the value by sending dummy byte
+    uint8_t centiseconds =  (uint8_t(response&0xF0)>>4)*10+uint8_t(response&0x0F)*1;
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x01); //reading seconds register
+    response =spi.write(0x01);
+    uint8_t seconds =  ((response&0x70)>>4)*10+(response&0x0F)*1;
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x02); //reading minutes register
+    response =spi.write(0x01);
+    uint8_t minutes =  ((response&0xF0)>>4)*10+(response&0x0F)*1;
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x03); //reading hours register
+    response=spi.write(0x01);
+    uint8_t hours =  ((response&0x30)>>4)*10+(response&0x0F)*1;
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x04); //reading day's  register
+    uint8_t day =spi.write(0x01);
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x05); //reading date register
+    response =spi.write(0x01);
+    uint8_t date =  ((response&0x30)>>4)*10+(response&0x0F)*1;
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x06); //reading month registe
+    response =spi.write(0x01);
+    uint8_t month =  ((response&0x10)>>4)*10+(response&0x0F)*1;
+    
+    gCS_RTC=1;
+    gCS_RTC=0;
+    spi.write(0x07); //reading year's registe
+    response =spi.write(0x01);
+    uint8_t year =  ((response&0xF0)>>4)*10+(response&0x0F)*1;
+    gCS_RTC=1;
+    //sprintf(Time_stamp,"%02d%02d%02d%02d%02d%02d%02d%02d",year, month, date, day, hours, minutes, seconds, milliseconds );
+    uint8_t Time_stamp[8] = {year, month, date, day, hours, minutes, seconds, centiseconds};
+    for(int i= 0; i<8;i++);
+        //printf("%d\t",Time_stamp[i]);
+    //printf("read\r\n");
+    uint64_t time;
+    time = 0;
+    time = time|(((uint64_t)(centiseconds&0x7F)));
+    time = time|(((uint64_t)(seconds&0x3F))<<7);
+    time = time|(((uint64_t)(minutes&0x3F))<<13);
+    time = time|(((uint64_t)(hours&0x1F))<<19);
+    time = time|(((uint64_t)(day&0x1F))<<24);
+    time = time|(((uint64_t)(month&0x07))<<29);
+    time = time|(((uint64_t)(year&0x03))<<33);
+    time = (time&0x00000007FFFFFFFF);
+    //printf("\n\r%x%x", (int)(time >> 32), (int)(time));
+    //printf("\n\r0x%016llx\n\r", time);
+   return time;
+}
+
+
+int main()
+{
+    
+    FCTN_CDMS_INIT_RTC();
+    uint64_t time = 0;
+    time = FCTN_CDMS_RD_RTC();
+    if(time != 0)
+    {
+        CDMS_LED1 = 1;
+        wait_ms(1000);
+        
+        CDMS_LED2 = 1;
+        wait_ms(1000);
+        
+        CDMS_LED3 = 1;
+        wait_ms(1000);
+        
+        CDMS_LED4 = 1;    
+    }
+    
+}
\ No newline at end of file

diff -r 000000000000 -r 071d67158a06 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue Jul 05 10:10:16 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/6c34061e7c34
\ No newline at end of file