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sdcard
Dependencies: SDFileSystem mbed
Fork of rtcfinalcodeyuppie by
Diff: main.cpp
- Revision:
- 0:d5e352a3ea98
- Child:
- 1:d360ad53f8fd
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Dec 22 06:10:52 2014 +0000 @@ -0,0 +1,113 @@ +#include "mbed.h" +SPI spi(PTD6, PTD7, PTD5); // mosi, miso, sclk +DigitalOut cs(PTD2); + + +int main() +{ + + + + // Setup the spi for 8 bit data, high steady state clock, + // second edge capture, with a 1MHz clock rate + spi.format(8,3); + spi.frequency(1000000); + + // Send the commands to write to test the seconds register + cs = 0; + spi.write(0x80); // set write register to seconds + spi.write(0x00); // send value of one + + cs=1; + cs=0; + spi.write(0x81); //write reg to minutes + spi.write(0x00); + + cs=1; + cs=0; + + spi.write(0x82); //write reg to minutes + spi.write(0x01); + + cs=1; + + cs = 0; + spi.write(0x83); // set write register to seconds + spi.write(0x01); // send value of one + + cs=1; + + cs = 0; + spi.write(0x84); // set write register to seconds + spi.write(0x01); // send value of one + + cs=1; + + cs = 0; + spi.write(0x85); // set write register to seconds + spi.write(0x01); // send value of one + + cs=1; + + cs = 0; + spi.write(0x86); // set write register to seconds + spi.write(0x01); // send value of one + + cs=1; + // Receive the contents of the seconds register + + for(int i=0;i<1000000;i++){ + + + cs=0; + spi.write(0x00); // set read register to seconds + int seconds = spi.write(0x00); // read the value + + cs=1; + cs=0; + + spi.write(0x01); + int minutes =spi.write(0x00); + + + cs=1; + cs=0; + + spi.write(0x02); + int hours =spi.write(0x01); + cs = 1; //This cs=1 is to make the chipselect line high to "deselect" the slave in our case RTC + + cs=0; + + spi.write(0x03); + int day =spi.write(0x01); + cs = 1; + + cs=0; + + spi.write(0x04); + int date =spi.write(0x01); + cs = 1; + + cs=0; + + spi.write(0x05); + int month =spi.write(0x01); + cs = 1; + + cs=0; + + spi.write(0x06); + int year =spi.write(0x01); + cs = 1; + + wait(1); + //This printf function is to check the timestamp function in the terminal output + printf("Seconds register = %2X : %2X : %2X : %2X : %2X : %2X : %2X \n\r",year,month,date,day, hours,minutes,seconds); + } + + return 0; + + + + } \ No newline at end of file