SenseSemi / Mbed 2 deprecated SPI_master

This code acts as the master controlling the slave actions, done using FRDM_KL_25Z

Dependencies:   mbed

main.cpp@0:7478eb44f4b1, 2016-07-29 (annotated)

Committer:
suhasini
Date:
Fri Jul 29 10:00:16 2016 +0000
Revision:
0:7478eb44f4b1
Master code using FRDM board

Who changed what in which revision?

UserRevisionLine numberNew contents of line
suhasini 0:7478eb44f4b1 1 #include "mbed.h"
suhasini 0:7478eb44f4b1 2
suhasini 0:7478eb44f4b1 3 SPI spi(PTD2, PTD3, PTD1); // mosi, miso, sclk
suhasini 0:7478eb44f4b1 4 DigitalOut cs(PTD0);
suhasini 0:7478eb44f4b1 5 Serial pc(USBTX,USBRX);
suhasini 0:7478eb44f4b1 6
suhasini 0:7478eb44f4b1 7
suhasini 0:7478eb44f4b1 8 int main() {
suhasini 0:7478eb44f4b1 9 pc.baud(115200);
suhasini 0:7478eb44f4b1 10 // Chip must be deselected
suhasini 0:7478eb44f4b1 11 cs = 1;
suhasini 0:7478eb44f4b1 12
suhasini 0:7478eb44f4b1 13 // Setup the spi for 8 bit data, high steady state clock,
suhasini 0:7478eb44f4b1 14 // second edge capture, with a 1MHz clock rate
suhasini 0:7478eb44f4b1 15 spi.format(8,1);
suhasini 0:7478eb44f4b1 16 //spi.frequency(1000000);
suhasini 0:7478eb44f4b1 17 spi.frequency(512000); //internal clock frequency of ADS1291
suhasini 0:7478eb44f4b1 18
suhasini 0:7478eb44f4b1 19 // Select the device by setting chip select low
suhasini 0:7478eb44f4b1 20 cs = 0;
suhasini 0:7478eb44f4b1 21 int v=0;
suhasini 0:7478eb44f4b1 22 // Send 0x8f, the command to read the WHOAMI register
suhasini 0:7478eb44f4b1 23 spi.write(0x8F);
suhasini 0:7478eb44f4b1 24
suhasini 0:7478eb44f4b1 25
suhasini 0:7478eb44f4b1 26 // Send a dummy byte to receive the contents of the WHOAMI register
suhasini 0:7478eb44f4b1 27 int whoami = spi.write(0x00);
suhasini 0:7478eb44f4b1 28 // printf("WHOAMI register = 0x%X\n", whoami);
suhasini 0:7478eb44f4b1 29 while(1)
suhasini 0:7478eb44f4b1 30 {
suhasini 0:7478eb44f4b1 31 wait(1);
suhasini 0:7478eb44f4b1 32
suhasini 0:7478eb44f4b1 33 spi.write(v);
suhasini 0:7478eb44f4b1 34 pc.printf("read the data %d",v);
suhasini 0:7478eb44f4b1 35 //led = !led;
suhasini 0:7478eb44f4b1 36 if(v==255)
suhasini 0:7478eb44f4b1 37 v=0;
suhasini 0:7478eb44f4b1 38 else
suhasini 0:7478eb44f4b1 39 v=v+1;
suhasini 0:7478eb44f4b1 40 }
suhasini 0:7478eb44f4b1 41 // Deselect the device
suhasini 0:7478eb44f4b1 42 cs = 1;
suhasini 0:7478eb44f4b1 43 }