Plymouth ELEC351 Group T / Mbed OS ELEC351_Group_T

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SPI.cpp@57:aba1296e51b1, 2018-08-15 (annotated)

Committer:
thomasmorris
Date:
Wed Aug 15 21:34:59 2018 +0000
Revision:
57:aba1296e51b1
Parent:
56:bc5345bc6650 
Final Version

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 57:aba1296e51b1 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 57:aba1296e51b1 43 /*
thomasmorris 56:bc5345bc6650 44 //pc.printf("SPI Test \n");
thomasmorris 56:bc5345bc6650 45 Thread::wait(1000);
thomasmorris 56:bc5345bc6650 46 cs= 0;
thomasmorris 56:bc5345bc6650 47 SPI_RX_DATA = spi.write(0xF0);
thomasmorris 56:bc5345bc6650 48 wait_us(3);
thomasmorris 56:bc5345bc6650 49 cs= 1;
thomasmorris 56:bc5345bc6650 50 colour_data = SPI_RX_DATA;
thomasmorris 56:bc5345bc6650 51 if(Log_Value == 1){pc.printf("Received data = %d\n", SPI_RX_DATA);}
thomasmorris 57:aba1296e51b1 52 pc.printf("Received data = %d\n", SPI_RX_DATA);
thomasmorris 56:bc5345bc6650 53 Thread::wait(1000);
thomasmorris 57:aba1296e51b1 54 */
thomasmorris 53:71f59e195f06 55 }