Thomas Morris / Mbed OS PROJ324_Final

Proj 324 Final

Fork of ELEC351_Group_T by Plymouth ELEC351 Group T

SPI.cpp@56:bc5345bc6650, 2018-07-16 (annotated)

Committer:
thomasmorris
Date:
Mon Jul 16 10:51:47 2018 +0000
Revision:
56:bc5345bc6650
Parent:
53:71f59e195f06
Child:
57:aba1296e51b1
Moves added to serial;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
thomasmorris 53:71f59e195f06 1 #include "SPI.hpp"
thomasmorris 53:71f59e195f06 2 //File for SPI communication
thomasmorris 53:71f59e195f06 3
thomasmorris 56:bc5345bc6650 4 int SPI_RX_DATA = 0;
thomasmorris 53:71f59e195f06 5
thomasmorris 53:71f59e195f06 6 void SPI_INIT()
thomasmorris 53:71f59e195f06 7 {
thomasmorris 53:71f59e195f06 8
thomasmorris 53:71f59e195f06 9
thomasmorris 53:71f59e195f06 10 /*
thomasmorris 53:71f59e195f06 11 MOSI = Blue
thomasmorris 53:71f59e195f06 12 MISO = White
thomasmorris 53:71f59e195f06 13 SCLK = Yellow
thomasmorris 53:71f59e195f06 14 Slave Select = Green
thomasmorris 53:71f59e195f06 15
thomasmorris 53:71f59e195f06 16 */
thomasmorris 53:71f59e195f06 17
thomasmorris 53:71f59e195f06 18
thomasmorris 53:71f59e195f06 19 // Chip must be deselected
thomasmorris 53:71f59e195f06 20 cs = 1; //Active Low
thomasmorris 53:71f59e195f06 21
thomasmorris 53:71f59e195f06 22 // Setup the spi for 8 bit data, high steady state clock,
thomasmorris 53:71f59e195f06 23 // second edge capture, with a 1MHz clock rate
thomasmorris 53:71f59e195f06 24 spi.format(16,0); // 8 Data bits phase 0 polarity 0
thomasmorris 53:71f59e195f06 25 spi.frequency(1000000);//Output clock frequency 1Mhz
thomasmorris 53:71f59e195f06 26
thomasmorris 53:71f59e195f06 27 // Select the device by seting chip select low
thomasmorris 53:71f59e195f06 28 //cs = 0;//This is active after spi is set up
thomasmorris 53:71f59e195f06 29
thomasmorris 53:71f59e195f06 30 // Send 0x8f, the command to read the WHOAMI register
thomasmorris 53:71f59e195f06 31 //spi.write(0x8F);
thomasmorris 53:71f59e195f06 32
thomasmorris 53:71f59e195f06 33 // Send a dummy byte to receive the contents of the WHOAMI register
thomasmorris 53:71f59e195f06 34 //int whoami = spi.write(0x00);
thomasmorris 53:71f59e195f06 35 //printf("WHOAMI register = 0x%X\n", whoami);
thomasmorris 53:71f59e195f06 36 // Deselect the device
thomasmorris 53:71f59e195f06 37 //cs = 1;
thomasmorris 56:bc5345bc6650 38 }
thomasmorris 56:bc5345bc6650 39
thomasmorris 56:bc5345bc6650 40
thomasmorris 56:bc5345bc6650 41 void SPI_INTERFACE_SERIAL()
thomasmorris 56:bc5345bc6650 42 {
thomasmorris 56:bc5345bc6650 43 //pc.printf("SPI Test \n");
thomasmorris 56:bc5345bc6650 44 Thread::wait(1000);
thomasmorris 56:bc5345bc6650 45 cs= 0;
thomasmorris 56:bc5345bc6650 46 SPI_RX_DATA = spi.write(0xF0);
thomasmorris 56:bc5345bc6650 47 wait_us(3);
thomasmorris 56:bc5345bc6650 48 cs= 1;
thomasmorris 56:bc5345bc6650 49 colour_data = SPI_RX_DATA;
thomasmorris 56:bc5345bc6650 50 if(Log_Value == 1){pc.printf("Received data = %d\n", SPI_RX_DATA);}
thomasmorris 56:bc5345bc6650 51 Thread::wait(1000);
thomasmorris 53:71f59e195f06 52 }