sdcard
Dependencies: SDFileSystem mbed
Fork of rtcfinalcodeyuppie by
main.cpp@0:d5e352a3ea98, 2014-12-22 (annotated)
- Committer:
- duke970
- Date:
- Mon Dec 22 06:10:52 2014 +0000
- Revision:
- 0:d5e352a3ea98
- Child:
- 1:d360ad53f8fd
DS3234 RTC hard code ;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
duke970 | 0:d5e352a3ea98 | 1 | #include "mbed.h" |
duke970 | 0:d5e352a3ea98 | 2 | SPI spi(PTD6, PTD7, PTD5); // mosi, miso, sclk |
duke970 | 0:d5e352a3ea98 | 3 | DigitalOut cs(PTD2); |
duke970 | 0:d5e352a3ea98 | 4 | |
duke970 | 0:d5e352a3ea98 | 5 | |
duke970 | 0:d5e352a3ea98 | 6 | int main() |
duke970 | 0:d5e352a3ea98 | 7 | { |
duke970 | 0:d5e352a3ea98 | 8 | |
duke970 | 0:d5e352a3ea98 | 9 | |
duke970 | 0:d5e352a3ea98 | 10 | |
duke970 | 0:d5e352a3ea98 | 11 | // Setup the spi for 8 bit data, high steady state clock, |
duke970 | 0:d5e352a3ea98 | 12 | // second edge capture, with a 1MHz clock rate |
duke970 | 0:d5e352a3ea98 | 13 | spi.format(8,3); |
duke970 | 0:d5e352a3ea98 | 14 | spi.frequency(1000000); |
duke970 | 0:d5e352a3ea98 | 15 | |
duke970 | 0:d5e352a3ea98 | 16 | // Send the commands to write to test the seconds register |
duke970 | 0:d5e352a3ea98 | 17 | cs = 0; |
duke970 | 0:d5e352a3ea98 | 18 | spi.write(0x80); // set write register to seconds |
duke970 | 0:d5e352a3ea98 | 19 | spi.write(0x00); // send value of one |
duke970 | 0:d5e352a3ea98 | 20 | |
duke970 | 0:d5e352a3ea98 | 21 | cs=1; |
duke970 | 0:d5e352a3ea98 | 22 | cs=0; |
duke970 | 0:d5e352a3ea98 | 23 | spi.write(0x81); //write reg to minutes |
duke970 | 0:d5e352a3ea98 | 24 | spi.write(0x00); |
duke970 | 0:d5e352a3ea98 | 25 | |
duke970 | 0:d5e352a3ea98 | 26 | cs=1; |
duke970 | 0:d5e352a3ea98 | 27 | cs=0; |
duke970 | 0:d5e352a3ea98 | 28 | |
duke970 | 0:d5e352a3ea98 | 29 | spi.write(0x82); //write reg to minutes |
duke970 | 0:d5e352a3ea98 | 30 | spi.write(0x01); |
duke970 | 0:d5e352a3ea98 | 31 | |
duke970 | 0:d5e352a3ea98 | 32 | cs=1; |
duke970 | 0:d5e352a3ea98 | 33 | |
duke970 | 0:d5e352a3ea98 | 34 | cs = 0; |
duke970 | 0:d5e352a3ea98 | 35 | spi.write(0x83); // set write register to seconds |
duke970 | 0:d5e352a3ea98 | 36 | spi.write(0x01); // send value of one |
duke970 | 0:d5e352a3ea98 | 37 | |
duke970 | 0:d5e352a3ea98 | 38 | cs=1; |
duke970 | 0:d5e352a3ea98 | 39 | |
duke970 | 0:d5e352a3ea98 | 40 | cs = 0; |
duke970 | 0:d5e352a3ea98 | 41 | spi.write(0x84); // set write register to seconds |
duke970 | 0:d5e352a3ea98 | 42 | spi.write(0x01); // send value of one |
duke970 | 0:d5e352a3ea98 | 43 | |
duke970 | 0:d5e352a3ea98 | 44 | cs=1; |
duke970 | 0:d5e352a3ea98 | 45 | |
duke970 | 0:d5e352a3ea98 | 46 | cs = 0; |
duke970 | 0:d5e352a3ea98 | 47 | spi.write(0x85); // set write register to seconds |
duke970 | 0:d5e352a3ea98 | 48 | spi.write(0x01); // send value of one |
duke970 | 0:d5e352a3ea98 | 49 | |
duke970 | 0:d5e352a3ea98 | 50 | cs=1; |
duke970 | 0:d5e352a3ea98 | 51 | |
duke970 | 0:d5e352a3ea98 | 52 | cs = 0; |
duke970 | 0:d5e352a3ea98 | 53 | spi.write(0x86); // set write register to seconds |
duke970 | 0:d5e352a3ea98 | 54 | spi.write(0x01); // send value of one |
duke970 | 0:d5e352a3ea98 | 55 | |
duke970 | 0:d5e352a3ea98 | 56 | cs=1; |
duke970 | 0:d5e352a3ea98 | 57 | // Receive the contents of the seconds register |
duke970 | 0:d5e352a3ea98 | 58 | |
duke970 | 0:d5e352a3ea98 | 59 | for(int i=0;i<1000000;i++){ |
duke970 | 0:d5e352a3ea98 | 60 | |
duke970 | 0:d5e352a3ea98 | 61 | |
duke970 | 0:d5e352a3ea98 | 62 | cs=0; |
duke970 | 0:d5e352a3ea98 | 63 | spi.write(0x00); // set read register to seconds |
duke970 | 0:d5e352a3ea98 | 64 | int seconds = spi.write(0x00); // read the value |
duke970 | 0:d5e352a3ea98 | 65 | |
duke970 | 0:d5e352a3ea98 | 66 | cs=1; |
duke970 | 0:d5e352a3ea98 | 67 | cs=0; |
duke970 | 0:d5e352a3ea98 | 68 | |
duke970 | 0:d5e352a3ea98 | 69 | spi.write(0x01); |
duke970 | 0:d5e352a3ea98 | 70 | int minutes =spi.write(0x00); |
duke970 | 0:d5e352a3ea98 | 71 | |
duke970 | 0:d5e352a3ea98 | 72 | |
duke970 | 0:d5e352a3ea98 | 73 | cs=1; |
duke970 | 0:d5e352a3ea98 | 74 | cs=0; |
duke970 | 0:d5e352a3ea98 | 75 | |
duke970 | 0:d5e352a3ea98 | 76 | spi.write(0x02); |
duke970 | 0:d5e352a3ea98 | 77 | int hours =spi.write(0x01); |
duke970 | 0:d5e352a3ea98 | 78 | cs = 1; //This cs=1 is to make the chipselect line high to "deselect" the slave in our case RTC |
duke970 | 0:d5e352a3ea98 | 79 | |
duke970 | 0:d5e352a3ea98 | 80 | cs=0; |
duke970 | 0:d5e352a3ea98 | 81 | |
duke970 | 0:d5e352a3ea98 | 82 | spi.write(0x03); |
duke970 | 0:d5e352a3ea98 | 83 | int day =spi.write(0x01); |
duke970 | 0:d5e352a3ea98 | 84 | cs = 1; |
duke970 | 0:d5e352a3ea98 | 85 | |
duke970 | 0:d5e352a3ea98 | 86 | cs=0; |
duke970 | 0:d5e352a3ea98 | 87 | |
duke970 | 0:d5e352a3ea98 | 88 | spi.write(0x04); |
duke970 | 0:d5e352a3ea98 | 89 | int date =spi.write(0x01); |
duke970 | 0:d5e352a3ea98 | 90 | cs = 1; |
duke970 | 0:d5e352a3ea98 | 91 | |
duke970 | 0:d5e352a3ea98 | 92 | cs=0; |
duke970 | 0:d5e352a3ea98 | 93 | |
duke970 | 0:d5e352a3ea98 | 94 | spi.write(0x05); |
duke970 | 0:d5e352a3ea98 | 95 | int month =spi.write(0x01); |
duke970 | 0:d5e352a3ea98 | 96 | cs = 1; |
duke970 | 0:d5e352a3ea98 | 97 | |
duke970 | 0:d5e352a3ea98 | 98 | cs=0; |
duke970 | 0:d5e352a3ea98 | 99 | |
duke970 | 0:d5e352a3ea98 | 100 | spi.write(0x06); |
duke970 | 0:d5e352a3ea98 | 101 | int year =spi.write(0x01); |
duke970 | 0:d5e352a3ea98 | 102 | cs = 1; |
duke970 | 0:d5e352a3ea98 | 103 | |
duke970 | 0:d5e352a3ea98 | 104 | wait(1); |
duke970 | 0:d5e352a3ea98 | 105 | //This printf function is to check the timestamp function in the terminal output |
duke970 | 0:d5e352a3ea98 | 106 | printf("Seconds register = %2X : %2X : %2X : %2X : %2X : %2X : %2X \n\r",year,month,date,day, hours,minutes,seconds); |
duke970 | 0:d5e352a3ea98 | 107 | } |
duke970 | 0:d5e352a3ea98 | 108 | |
duke970 | 0:d5e352a3ea98 | 109 | return 0; |
duke970 | 0:d5e352a3ea98 | 110 | |
duke970 | 0:d5e352a3ea98 | 111 | |
duke970 | 0:d5e352a3ea98 | 112 | |
duke970 | 0:d5e352a3ea98 | 113 | } |