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Dependencies: FreescaleIAP mbed-rtos mbed
Diff: cdms_rtc.cpp
- Revision:
- 0:bcbd76c86cde
diff -r 000000000000 -r bcbd76c86cde cdms_rtc.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/cdms_rtc.cpp Wed Dec 16 09:06:59 2015 +0000 @@ -0,0 +1,154 @@ +#include "mbed.h" +#include "cdms_rtc.h" + +SPI rtc_spi(PTE1, PTE3, PTE2); // MOSI,MISO, CLOCK microcontroller(in order) +DigitalOut rtc_cs(PTE29); //Slave Select pin + +void FCTN_CDMS_INIT_RTC() +{ + rtc_cs=1; + rtc_spi.format(8,0); + rtc_spi.frequency(1000000); + //clearing the halt bit + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x8C); + rtc_spi.write(0x00); + + //clearing the OF bit + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x8F); + rtc_spi.write(0x00); + + //century bits + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x80|0x03); + rtc_spi.write(0x00); + + //Kick starting the oscillator + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x81); //register address with write flag + rtc_spi.write(0x80);//enabling stop bit in the seconds register + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x81); + rtc_spi.write(0x00);//disabling the stop bit to restart the oscillator + + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x80); + rtc_spi.write(0x01); // set milliseconds value to 00 + rtc_cs=1; + + rtc_cs=0; + rtc_spi.write(0x81); + rtc_spi.write(0x01); //set seconds value to 00 + rtc_cs=1; + + rtc_cs=0; + rtc_spi.write(0x82); + rtc_spi.write(0x01);//set minutes value to 00 + rtc_cs=1; + + rtc_cs=0; + rtc_spi.write(0x83); + rtc_spi.write(0x23); //set the hours to 01 + rtc_cs=1; + + rtc_cs=0; + rtc_spi.write(0x84); + rtc_spi.write(0x01); //set day of the week to 01 + rtc_cs=1; + + rtc_cs=0; + rtc_spi.write(0x85); + rtc_spi.write(0x31); //set date of the month to 01 + rtc_cs=1; + + rtc_cs=0; + rtc_spi.write(0x86); + rtc_spi.write(0x12); //set month to 01 + rtc_cs=1; + + rtc_cs=0; + rtc_spi.write(0x87); + rtc_spi.write(0x01); //set year to 00(2000) + rtc_cs=1; + printf("\n\r rtc initalised \n"); +} + +uint64_t FCTN_CDMS_RD_RTC() +{ + uint8_t response; + printf("\n\r Entered rtc\n"); + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x00); //reading milliseconds register + response = rtc_spi.write(0x00); // read the value by sending dummy byte + uint8_t centiseconds = (uint8_t(response&0xF0)>>4)*10+uint8_t(response&0x0F)*1; + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x01); //reading seconds register + response =rtc_spi.write(0x01); + uint8_t seconds = ((response&0x70)>>4)*10+(response&0x0F)*1; + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x02); //reading minutes register + response =rtc_spi.write(0x01); + uint8_t minutes = ((response&0xF0)>>4)*10+(response&0x0F)*1; + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x03); //reading hours register + response=rtc_spi.write(0x01); + uint8_t hours = ((response&0x30)>>4)*10+(response&0x0F)*1; + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x04); //reading day's register + uint8_t day =rtc_spi.write(0x01); + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x05); //reading date register + response =rtc_spi.write(0x01); + uint8_t date = ((response&0x30)>>4)*10+(response&0x0F)*1; + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x06); //reading month registe + response =rtc_spi.write(0x01); + uint8_t month = ((response&0x10)>>4)*10+(response&0x0F)*1; + + rtc_cs=1; + rtc_cs=0; + rtc_spi.write(0x07); //reading year's registe + response =rtc_spi.write(0x01); + uint8_t year = ((response&0xF0)>>4)*10+(response&0x0F)*1; + rtc_cs=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; +} \ No newline at end of file