Diff: SPI.cpp

Revision:

2:b615682e3e4f

Parent:

1:acc66d3a1a1c

Child:

3:d6e142b6ead1

--- a/SPI.cpp	Sun Apr 01 15:43:02 2018 +0000
+++ b/SPI.cpp	Sun Apr 01 15:54:46 2018 +0000
@@ -12,8 +12,77 @@
 DigitalIn DO_NOT_USE(PB_12);    // MAKE PB_12 (D19) an INPUT do NOT make an OUTPUT under any circumstances !!!!! ************* !!!!!!!!!!!
                                 // This Pin is connected to the 5VDC from the FPGA card and an INPUT is 5V Tolerant
 
+int adval_d;            //A to D value read back
+float adval_f;
+int err;                //error variable used for debugging, trapping etc.,
+
+char adval[32];
 //Ticker ticktock;
+void SPI_INIT (void)
+{
+    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
+    spi_cmd.frequency(1000000); // 1MHz clock rate
+    
+    adval_d = 0;            //A to D value read back
+    adval_f =0.0f;
+    err = 0;                //error variable used for debugging, trapping etc.,
+    
+// Preload some arrays
+//    char hello_world[]="Hello World";
+    char splash_screen1[]="Martin Simpson";
+    char splash_screen2[]="Plymouth UNI";
+    char DVM[]="Voltage=";
+// Start up sequences
+    lcd_cls();
+    lcd_locate(1,1);
+    lcd_display(splash_screen1);    //Credit line 1
+    lcd_locate(2,2);
+    lcd_display(splash_screen2);    //Credit line 2
+    wait(2);
+    lcd_cls();
+    pulse_bar_graph(); //Flashy bargraph clear screen  
+    lcd_locate(1,0);
+    lcd_display(DVM);   //Type Voltage display
+    lcd_locate(1,13);
+    lcd_display("V");   //Units display
+}
 
+void SPI_TEST(void)
+{
+    adval_d = read_adc();
+    
+    adval_f = 3.3f*((float)adval_d/4095);//Convert 12 bit to a float and scale
+    sprintf(adval,"%.3f",adval_f);       //Store in an array string
+    lcd_locate(1,8);                     //and display on LCD
+    lcd_display(adval);                  //
+    
+    err = bar_graph(adval_d/255);       // 16*256 =4096 12 bit ADC!
+    if (err < 0){printf("Display Overload\r\n");}
+    
+    read_switches();
+    //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
+        spi_cmd.write(0);
+        spi.write(i);
+        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
+        spi_cmd.write(0);
+        spi.write(i);
+        cs = 1;             //De-Select the device by seting chip select HIGH
+        wait_ms(20);
+    }
+}
 
 int lcd_cls(void){
     LCD_cs = 0;spi_cmd.write(0);spi.write(0x0001);LCD_cs = 1;wait_us(CD);    //Clear Screen