Michele Perotti / Mbed 2 deprecated lab2_SPI

lab2_SPI

Dependencies:   mbed

main.cpp@0:f7cd39ae51f7, 2013-12-10 (annotated)

Committer:
micheleperotti
Date:
Tue Dec 10 19:52:40 2013 +0000
Revision:
0:f7cd39ae51f7
lab2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
micheleperotti 0:f7cd39ae51f7 1 #include "mbed.h"
micheleperotti 0:f7cd39ae51f7 2
micheleperotti 0:f7cd39ae51f7 3
micheleperotti 0:f7cd39ae51f7 4
micheleperotti 0:f7cd39ae51f7 5 DigitalOut redLed(LED_RED);
micheleperotti 0:f7cd39ae51f7 6 DigitalOut spiSS(PTD0);
micheleperotti 0:f7cd39ae51f7 7
micheleperotti 0:f7cd39ae51f7 8 int main() {
micheleperotti 0:f7cd39ae51f7 9
micheleperotti 0:f7cd39ae51f7 10 SPI spiMaster(PTD2, PTD3, PTD1);
micheleperotti 0:f7cd39ae51f7 11 spiMaster.format(8,1);
micheleperotti 0:f7cd39ae51f7 12 spiMaster.frequency(100000);
micheleperotti 0:f7cd39ae51f7 13 spiSS=1;
micheleperotti 0:f7cd39ae51f7 14
micheleperotti 0:f7cd39ae51f7 15 while(1){
micheleperotti 0:f7cd39ae51f7 16 //read switch
micheleperotti 0:f7cd39ae51f7 17 spiSS=0;
micheleperotti 0:f7cd39ae51f7 18 spiMaster.write('#');
micheleperotti 0:f7cd39ae51f7 19 spiMaster.write(0x01);
micheleperotti 0:f7cd39ae51f7 20 int switchVal = spiMaster.write(0x55);
micheleperotti 0:f7cd39ae51f7 21 spiSS=1;
micheleperotti 0:f7cd39ae51f7 22 wait(0.0001);
micheleperotti 0:f7cd39ae51f7 23 //write LED
micheleperotti 0:f7cd39ae51f7 24 spiSS=0;
micheleperotti 0:f7cd39ae51f7 25 spiMaster.write('#');
micheleperotti 0:f7cd39ae51f7 26 spiMaster.write(0x02);
micheleperotti 0:f7cd39ae51f7 27 spiMaster.write(switchVal);
micheleperotti 0:f7cd39ae51f7 28 spiSS=1;
micheleperotti 0:f7cd39ae51f7 29 wait(0.0001);
micheleperotti 0:f7cd39ae51f7 30 //read LED
micheleperotti 0:f7cd39ae51f7 31 spiSS=0;
micheleperotti 0:f7cd39ae51f7 32 spiMaster.write('#');
micheleperotti 0:f7cd39ae51f7 33 spiMaster.write(0x03);
micheleperotti 0:f7cd39ae51f7 34 int LEDVal = spiMaster.write(0x55);
micheleperotti 0:f7cd39ae51f7 35 spiSS=1;
micheleperotti 0:f7cd39ae51f7 36 wait(0.0001);
micheleperotti 0:f7cd39ae51f7 37 //read switch another tima
micheleperotti 0:f7cd39ae51f7 38 spiSS=0;
micheleperotti 0:f7cd39ae51f7 39 spiMaster.write('#');
micheleperotti 0:f7cd39ae51f7 40 spiMaster.write(0x01);
micheleperotti 0:f7cd39ae51f7 41 switchVal = spiMaster.write(0x55);
micheleperotti 0:f7cd39ae51f7 42 spiSS=1;
micheleperotti 0:f7cd39ae51f7 43 wait(0.0001);
micheleperotti 0:f7cd39ae51f7 44 //verify correctness of SPI behaviour
micheleperotti 0:f7cd39ae51f7 45 if (LEDVal!=switchVal)
micheleperotti 0:f7cd39ae51f7 46 {
micheleperotti 0:f7cd39ae51f7 47 redLed=0;
micheleperotti 0:f7cd39ae51f7 48 } else {
micheleperotti 0:f7cd39ae51f7 49 redLed=1;
micheleperotti 0:f7cd39ae51f7 50 }
micheleperotti 0:f7cd39ae51f7 51 wait (0.02);
micheleperotti 0:f7cd39ae51f7 52 }
micheleperotti 0:f7cd39ae51f7 53 }