joshua Elsdon
/
PrintHeadLED
Shift reg led (ICRS)
main.cpp@0:9ff3d26e2cb8, 2015-06-17 (annotated)
- Committer:
- je310
- Date:
- Wed Jun 17 15:57:58 2015 +0000
- Revision:
- 0:9ff3d26e2cb8
hello world;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
je310 | 0:9ff3d26e2cb8 | 1 | #include "mbed.h" |
je310 | 0:9ff3d26e2cb8 | 2 | |
je310 | 0:9ff3d26e2cb8 | 3 | SPI spi(p11, p12, p13); // mosi, miso, sclk |
je310 | 0:9ff3d26e2cb8 | 4 | DigitalOut cs(p8); |
je310 | 0:9ff3d26e2cb8 | 5 | DigitalOut fire(p29); |
je310 | 0:9ff3d26e2cb8 | 6 | DigitalOut step(p26); |
je310 | 0:9ff3d26e2cb8 | 7 | DigitalOut dir(p27); |
je310 | 0:9ff3d26e2cb8 | 8 | int main() { |
je310 | 0:9ff3d26e2cb8 | 9 | // Chip must be deselected |
je310 | 0:9ff3d26e2cb8 | 10 | fire = 1; |
je310 | 0:9ff3d26e2cb8 | 11 | cs = 1; |
je310 | 0:9ff3d26e2cb8 | 12 | |
je310 | 0:9ff3d26e2cb8 | 13 | // Setup the spi for 8 bit data, high steady state clock, |
je310 | 0:9ff3d26e2cb8 | 14 | // second edge capture, with a 1MHz clock rate |
je310 | 0:9ff3d26e2cb8 | 15 | spi.format(8,3); |
je310 | 0:9ff3d26e2cb8 | 16 | spi.frequency(1000000); |
je310 | 0:9ff3d26e2cb8 | 17 | char myChar = 0x01; |
je310 | 0:9ff3d26e2cb8 | 18 | int count = 0; |
je310 | 0:9ff3d26e2cb8 | 19 | int skip = 0; |
je310 | 0:9ff3d26e2cb8 | 20 | dir = 1; |
je310 | 0:9ff3d26e2cb8 | 21 | step = 1; |
je310 | 0:9ff3d26e2cb8 | 22 | |
je310 | 0:9ff3d26e2cb8 | 23 | // Send 0x8f, the command to read the WHOAMI register |
je310 | 0:9ff3d26e2cb8 | 24 | |
je310 | 0:9ff3d26e2cb8 | 25 | |
je310 | 0:9ff3d26e2cb8 | 26 | for(int i = 0; i<8; i++){ |
je310 | 0:9ff3d26e2cb8 | 27 | spi.write(myChar); |
je310 | 0:9ff3d26e2cb8 | 28 | } |
je310 | 0:9ff3d26e2cb8 | 29 | |
je310 | 0:9ff3d26e2cb8 | 30 | while(1){ |
je310 | 0:9ff3d26e2cb8 | 31 | fire = 0; |
je310 | 0:9ff3d26e2cb8 | 32 | step = 0; |
je310 | 0:9ff3d26e2cb8 | 33 | wait_us(250); |
je310 | 0:9ff3d26e2cb8 | 34 | fire = 1; |
je310 | 0:9ff3d26e2cb8 | 35 | step = 1; |
je310 | 0:9ff3d26e2cb8 | 36 | wait_us(10); |
je310 | 0:9ff3d26e2cb8 | 37 | if(count == 80 && skip == 0){ |
je310 | 0:9ff3d26e2cb8 | 38 | if(myChar != 0x80){ |
je310 | 0:9ff3d26e2cb8 | 39 | myChar = myChar << 1; |
je310 | 0:9ff3d26e2cb8 | 40 | } |
je310 | 0:9ff3d26e2cb8 | 41 | else{ |
je310 | 0:9ff3d26e2cb8 | 42 | myChar = 0x01; |
je310 | 0:9ff3d26e2cb8 | 43 | skip = 1; |
je310 | 0:9ff3d26e2cb8 | 44 | } |
je310 | 0:9ff3d26e2cb8 | 45 | |
je310 | 0:9ff3d26e2cb8 | 46 | |
je310 | 0:9ff3d26e2cb8 | 47 | for(int i = 0; i<8; i++){ |
je310 | 0:9ff3d26e2cb8 | 48 | spi.write(myChar); |
je310 | 0:9ff3d26e2cb8 | 49 | } |
je310 | 0:9ff3d26e2cb8 | 50 | count =0; |
je310 | 0:9ff3d26e2cb8 | 51 | } |
je310 | 0:9ff3d26e2cb8 | 52 | |
je310 | 0:9ff3d26e2cb8 | 53 | count++; |
je310 | 0:9ff3d26e2cb8 | 54 | if(skip ==1){ |
je310 | 0:9ff3d26e2cb8 | 55 | //count = 20; |
je310 | 0:9ff3d26e2cb8 | 56 | skip = 0; |
je310 | 0:9ff3d26e2cb8 | 57 | } |
je310 | 0:9ff3d26e2cb8 | 58 | |
je310 | 0:9ff3d26e2cb8 | 59 | } |
je310 | 0:9ff3d26e2cb8 | 60 | |
je310 | 0:9ff3d26e2cb8 | 61 | } |