IEEE TAMU MCC / Mbed 2 deprecated SPI_Master_Example_SerialComm

V1.0 of SPI Master Example for Serial Communications Workshop

Dependencies:   mbed tsi_sensor

main.cpp@0:c48a4735d25f, 2015-03-06 (annotated)

Committer:
MoffMade
Date:
Fri Mar 06 22:00:20 2015 +0000
Revision:
0:c48a4735d25f
V1.0 of SPI Master Example for Serial Communications Workshop

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MoffMade 0:c48a4735d25f 1 #include "mbed.h"
MoffMade 0:c48a4735d25f 2 #include "tsi_sensor.h"
MoffMade 0:c48a4735d25f 3 #define ELEC0 9 // Pin connections for touch sensor
MoffMade 0:c48a4735d25f 4 #define ELEC1 10
MoffMade 0:c48a4735d25f 5
MoffMade 0:c48a4735d25f 6 SPI spi(PTD2, PTD3, PTD1); // mosi, miso, sclk
MoffMade 0:c48a4735d25f 7 DigitalOut cs(PTD0);
MoffMade 0:c48a4735d25f 8 TSIAnalogSlider tsi(ELEC0, ELEC1, 40);
MoffMade 0:c48a4735d25f 9 Serial pc(USBTX, USBRX); // Configure PC UART
MoffMade 0:c48a4735d25f 10
MoffMade 0:c48a4735d25f 11 int main() {
MoffMade 0:c48a4735d25f 12
MoffMade 0:c48a4735d25f 13 // Configure PC/Serial Connection
MoffMade 0:c48a4735d25f 14 pc.baud(9600);
MoffMade 0:c48a4735d25f 15 char slidervalue = 0;
MoffMade 0:c48a4735d25f 16 char responsevalue = 0;
MoffMade 0:c48a4735d25f 17 // Chip must be deselected
MoffMade 0:c48a4735d25f 18 cs = 1;
MoffMade 0:c48a4735d25f 19 // Setup the spi for 8 bit data, high steady state clock,
MoffMade 0:c48a4735d25f 20 // second edge capture, with a 1MHz clock rate
MoffMade 0:c48a4735d25f 21 spi.format(8,3);
MoffMade 0:c48a4735d25f 22 spi.frequency(1000000);
MoffMade 0:c48a4735d25f 23
MoffMade 0:c48a4735d25f 24 while(true) {
MoffMade 0:c48a4735d25f 25 slidervalue = (char)(254 * tsi.readPercentage() + 1); // Get value from Cap. Touch
MoffMade 0:c48a4735d25f 26 cs = 0; // Select the device by seting chip select low
MoffMade 0:c48a4735d25f 27 spi.write(slidervalue); // Send slider percentage in a single byte
MoffMade 0:c48a4735d25f 28 responsevalue = spi.write(0x00); // Send slider percentage in a single byte
MoffMade 0:c48a4735d25f 29 pc.printf("LED Adjusted to = 0x%X\n\r", responsevalue); // Print to PC/Serial
MoffMade 0:c48a4735d25f 30 // Deselect the device
MoffMade 0:c48a4735d25f 31 cs = 1;
MoffMade 0:c48a4735d25f 32 }
MoffMade 0:c48a4735d25f 33 }