Diff: main.cpp

Revision:

0:bd580f96eb45

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 30 21:39:07 2010 +0000
@@ -0,0 +1,182 @@
+#include "mbed.h"
+
+Serial pc(USBTX,USBRX);
+BusOut myled(LED1,LED2,LED3,LED4); // all leds of mbed lsb -> msb
+DigitalOut ssel(p24);   // SSEL pio1_11/mbed p24
+SPI spi(p5, p6, p7);    // mosi, miso, sclk
+
+BusOut rgb(p26,p18,p25); // red, blue, green
+InterruptIn button(p12); // 0= active/pushed 
+
+// rgb buss assignments
+#define RGB_RED   0x01
+#define RGB_BLUE  0x02
+#define RGB_GREEN 0x04
+
+/*  7 Segment Display - this Rev A layout is rotated 180 degrees such that the
+    decimal point is at the Top/Left
+
+    Rev A schematic defines segent order as: 
+    
+    msb 7  6  5  4  3  2  1  0 
+        F  C  .  B  A  G  E  D
+        
+    but setting individual segments shows:
+    msb 7  6  5  4  3  2  1  0 
+        F  .  E  D  G  B  A  C
+  
+                
+             --A--
+            |     |
+            F     B
+            |     |
+             --G--
+            |     |
+            E     C
+            |     |
+             --D--
+ */
+
+// actual segments
+#define SA  0xfd 
+#define SB  0xfb 
+#define SC  0xfe 
+#define SD  0xef 
+#define SE  0xdf 
+#define SF  0x7f 
+#define SG  0xf7 
+#define SDP 0xbf 
+
+
+#define WTIME   2.5     // delay between cycles
+
+short curTest = 0;      // 0= all segments, 1= march segments 
+
+/*      nextTest    ** Interrupt Event for pin fall **
+
+    Advance curTest
+*/
+
+void nextTest(void) {
+    curTest++;
+    if (curTest >= 3)
+      curTest = 0;
+}
+
+/*  setIO
+
+    This procedure is used to set the following I/P ports:
+    
+    ph      myLed   Shows the test phase
+    sv      SPI     7-Segment value 0=On
+    lc      RGB     Led Color
+*/    
+void setIO(short ph, short sv, short lc) {
+    myled = ph;         // identify phase
+
+    ssel = 0;           // start ssel (sets RCLK to 0)    
+    spi.write(sv);      // write to the shift register
+    ssel = 1;           // Toggle RCLK/STCP to apply the SR --> NumDisplay (Rising edge action)
+
+    rgb = lc;           // set led color
+    wait(WTIME);        // common delay
+}
+
+/*      groupSegs
+
+    This test groups all segments (G:A and DP)
+    
+    1:  Segs=Off, DP=Off, Red
+    2:  Segs=Off, DP=On, Green
+    3:  Segs:On,  DP=Off, Blue
+    4:  Segs=On,  DP=On, RGB
+*/
+void groupSegs(void) {
+
+    setIO(1,0xff,RGB_RED);      // 1: all Off, Red
+    setIO(2,0xbf,RGB_GREEN);    // 2: b6 decimal on, others OFF, Green
+    setIO(4,0x40,RGB_BLUE);     // 3: b6 decimal off, others On, Blue
+    setIO(8,0x00,RGB_RED | RGB_GREEN | RGB_BLUE); // 3: all on, all colors
+}
+
+/*      marchBits
+
+    Marches by bit position: 0 -> 7  
+
+    This test marches the bits Low to turn on each segment
+    in the order of bit 0 --> bit 7
+    
+    The initail setting is phase F and all segments Off
+*/
+    
+void marchBits(void) {
+    setIO(0xf,0xff,0);    // 1: all Off
+    setIO(0,0xfe,0);      // 2: b0
+    setIO(1,0xfd,0);      // 3: b1
+    setIO(2,0xfb,0);      // 4: b2
+    setIO(3,0xf7,0);      // 1: b3
+    setIO(4,0xef,0);      // 2: b4
+    setIO(5,0xdf,0);      // 3: b5
+    setIO(6,0xbf,0);      // 4: b6
+    setIO(7,0x7f,0);      // 4: b7
+}
+
+/*  marchSegs
+
+    Marches by Segments: A -> G, DP  
+
+    This test marches the bits Low to turn on each segment
+    in the order of the segments A -> G, DP
+    
+    The initail setting is phase F and all segments Off
+*/
+
+void marchSegs(void) {
+    setIO(0xf,0xff,0);    // 1: all Off
+    setIO(0,SA,0);      // 2: b1
+    setIO(1,SB,0);      // 3: b2
+    setIO(2,SC,0);      // 4: b0
+    setIO(3,SD,0);      // 1: b4
+    setIO(4,SE,0);      // 2: b5
+    setIO(5,SF,0);      // 3: b7
+    setIO(6,SG,0);      // 4: b3
+    setIO(7,SDP,0);     // 4: b6
+}
+
+
+/*      main
+
+*/
+int main() {
+    pc.printf("\nEA: Segment & Board I/O Tests\n");
+    pc.printf("\n Depress/Push Joystick to change tests at end of test cycle\n");
+    button.fall(&nextTest);
+    
+    myled = 0;
+    spi.format(8,1);    // set format as 8b/pol:pha=0
+    spi.frequency(1000000); // default is 1mhz
+
+    /* curTest is advanced by the depression/push down of the Joystick */  
+    while(1) {
+     switch (curTest){
+       case 0:
+         printf("  Group Segments & RGB Led...\n");
+         groupSegs(); 
+         break;
+       
+       case 1:  
+         printf("  March Bits b0 => b7...\n");
+         marchBits(); 
+         break;
+         
+       case 2:  
+         printf("  March Segments SA => SG, DP...\n");
+         marchSegs(); 
+         break;
+         
+       default: curTest = 0; break;
+     }
+   }
+}
+
+    
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