Diff: SPI.cpp

Revision:

3:d6e142b6ead1

Parent:

2:b615682e3e4f

Child:

4:bcef9164776e

--- a/SPI.cpp	Sun Apr 01 15:54:46 2018 +0000
+++ b/SPI.cpp	Sun Apr 01 16:22:36 2018 +0000
@@ -4,9 +4,12 @@
                                 // However using multi SPI devices within FPGA with a seperate chip select
 SPI spi_cmd(PA_7, PA_6, PA_5);  // NB another instance call spi_cmd for 8 bit SPI dataframe see later line 37
                                 // For each device NB PA_7 PA_6 PA_5 are D11 D12 D13 respectively
-DigitalOut cs(PC_6);            // Chip Select for Basic Outputs to illuminate Onboard FPGA DEO nano LEDs CN7 pin 1
-DigitalOut LCD_cs(PB_15);       // Chip Select for the LCD via FPGA CN7 pin 3
-DigitalOut ADC_cs(PB_9);        // Chip Select for the ADC via FPGA CN7 pin 4
+                                
+//DigitalOut LED_cs(PC_6);        // Chip Select for Basic Outputs to illuminate Onboard FPGA DEO nano LEDs CN7 pin 1
+//DigitalOut LCD_cs(PB_15);       // Chip Select for the LCD via FPGA CN7 pin 3
+//DigitalOut ADC_cs(PB_9);        // Chip Select for the ADC via FPGA CN7 pin 4
+
+BusOut cs(PB_9,PB_15,PC_6);     // Chip Select => 111(7) = Nothing, 110(6) = General, 101(5) = LCD, 011(3) = ADC
 
 //NBB the following line for F429ZI !!!!
 DigitalIn DO_NOT_USE(PB_12);    // MAKE PB_12 (D19) an INPUT do NOT make an OUTPUT under any circumstances !!!!! ************* !!!!!!!!!!!
@@ -20,9 +23,10 @@
 //Ticker ticktock;
 void SPI_INIT (void)
 {
-    cs = 1;                     // Chip must be deselected, Chip Select is active LOW
+    LED_cs = 1;                     // Chip must be deselected, Chip Select is active LOW
     LCD_cs = 1;                 // Chip must be deselected, Chip Select is active LOW
     ADC_cs = 1;                 // Chip must be deselected, Chip Select is active LOW
+    
     spi.format(16,0);           // Setup the DATA frame SPI for 16 bit wide word, Clock Polarity 0 and Clock Phase 0 (0)
     spi_cmd.format(8,0);        // Setup the COMMAND SPI as 8 Bit wide word, Clock Polarity 0 and Clock Phase 0 (0)
     spi.frequency(1000000);     // 1MHz clock rate
@@ -68,18 +72,18 @@
     //LED Chaser display KIT lives on!
     for (uint32_t i=1;i<=128;i*=2)
     {
-        cs = 0;             //Select the device by seting chip select LOW
+        LED_cs = 0;             //Select the device by seting chip select LOW
         spi_cmd.write(0);
         spi.write(i);
-        cs = 1;             //De-Select the device by seting chip select HIGH
+        LED_cs = 1;             //De-Select the device by seting chip select HIGH
         wait_ms(20);
     }
     for (uint32_t i=128;i>=1;i/=2)
     {
-        cs = 0;             //Select the device by seting chip select LOW
+        LED_cs = 0;             //Select the device by seting chip select LOW
         spi_cmd.write(0);
         spi.write(i);
-        cs = 1;             //De-Select the device by seting chip select HIGH
+        LED_cs = 1;             //De-Select the device by seting chip select HIGH
         wait_ms(20);
     }
 }
@@ -173,10 +177,10 @@
 
 int read_switches(void){
     int sw_val;
-    cs = 0;
+    LED_cs = 0;
     spi_cmd.write(0);
     sw_val = spi.write(0x00)&0x0F; // Just want lower 4bit nibble
-    cs = 1 ;
+    LED_cs = 1 ;
     if (sw_val&(1<<0)){printf("Switch 0 :");}
     if (sw_val&(1<<1)){printf("Switch 1 :");}
     if (sw_val&(1<<2)){printf("Switch 2 :");}