Rick Drolet / Mbed 2 deprecated EA_SegIoTest

EA Base Board Simple I/O Tests

Dependencies:   mbed

main.cpp@0:bd580f96eb45, 2010-03-30 (annotated)

Committer:
caprock
Date:
Tue Mar 30 21:39:07 2010 +0000
Revision:
0:bd580f96eb45

        

        
Who changed what in which revision?

        

            
                
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#include "mbed.h"





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Serial pc(USBTX,USBRX);





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BusOut myled(LED1,LED2,LED3,LED4); // all leds of mbed lsb -> msb





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DigitalOut ssel(p24);   // SSEL pio1_11/mbed p24





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SPI spi(p5, p6, p7);    // mosi, miso, sclk





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BusOut rgb(p26,p18,p25); // red, blue, green





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InterruptIn button(p12); // 0= active/pushed 





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// rgb buss assignments





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#define RGB_RED   0x01





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#define RGB_BLUE  0x02





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#define RGB_GREEN 0x04





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/*  7 Segment Display - this Rev A layout is rotated 180 degrees such that the





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    decimal point is at the Top/Left





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    Rev A schematic defines segent order as: 





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    msb 7  6  5  4  3  2  1  0 





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        F  C  .  B  A  G  E  D





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    but setting individual segments shows:





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    msb 7  6  5  4  3  2  1  0 





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        F  .  E  D  G  B  A  C





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             --A--





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            |     |





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            F     B





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            |     |





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             --G--





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            |     |





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            E     C





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            |     |





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             --D--





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 */





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// actual segments





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#define SA  0xfd 





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#define SB  0xfb 





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#define SC  0xfe 





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#define SD  0xef 





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#define SE  0xdf 





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#define SF  0x7f 





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#define SG  0xf7 





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#define SDP 0xbf 





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#define WTIME   2.5     // delay between cycles





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short curTest = 0;      // 0= all segments, 1= march segments 





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/*      nextTest    ** Interrupt Event for pin fall **





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    Advance curTest





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*/





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void nextTest(void) {





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    curTest++;





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    if (curTest >= 3)





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      curTest = 0;





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}





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/*  setIO





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    This procedure is used to set the following I/P ports:





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    ph      myLed   Shows the test phase





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    sv      SPI     7-Segment value 0=On





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    lc      RGB     Led Color





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*/    





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void setIO(short ph, short sv, short lc) {





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    myled = ph;         // identify phase





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    ssel = 0;           // start ssel (sets RCLK to 0)    





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    spi.write(sv);      // write to the shift register





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    ssel = 1;           // Toggle RCLK/STCP to apply the SR --> NumDisplay (Rising edge action)





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    rgb = lc;           // set led color





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    wait(WTIME);        // common delay





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}





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/*      groupSegs





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    This test groups all segments (G:A and DP)





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    1:  Segs=Off, DP=Off, Red





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    2:  Segs=Off, DP=On, Green





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    3:  Segs:On,  DP=Off, Blue





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    4:  Segs=On,  DP=On, RGB





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*/





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void groupSegs(void) {





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    setIO(1,0xff,RGB_RED);      // 1: all Off, Red





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    setIO(2,0xbf,RGB_GREEN);    // 2: b6 decimal on, others OFF, Green





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    setIO(4,0x40,RGB_BLUE);     // 3: b6 decimal off, others On, Blue





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    setIO(8,0x00,RGB_RED | RGB_GREEN | RGB_BLUE); // 3: all on, all colors





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}





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/*      marchBits





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    Marches by bit position: 0 -> 7  





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    This test marches the bits Low to turn on each segment





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    in the order of bit 0 --> bit 7





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    The initail setting is phase F and all segments Off





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*/





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void marchBits(void) {





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    setIO(0xf,0xff,0);    // 1: all Off





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    setIO(0,0xfe,0);      // 2: b0





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    setIO(1,0xfd,0);      // 3: b1





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    setIO(2,0xfb,0);      // 4: b2





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    setIO(3,0xf7,0);      // 1: b3





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    setIO(4,0xef,0);      // 2: b4





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    setIO(5,0xdf,0);      // 3: b5





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    setIO(6,0xbf,0);      // 4: b6





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    setIO(7,0x7f,0);      // 4: b7





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}





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/*  marchSegs





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    Marches by Segments: A -> G, DP  





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    This test marches the bits Low to turn on each segment





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    in the order of the segments A -> G, DP





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    The initail setting is phase F and all segments Off





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*/





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void marchSegs(void) {





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    setIO(0xf,0xff,0);    // 1: all Off





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    setIO(0,SA,0);      // 2: b1





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    setIO(1,SB,0);      // 3: b2





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    setIO(2,SC,0);      // 4: b0





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    setIO(3,SD,0);      // 1: b4





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    setIO(4,SE,0);      // 2: b5





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    setIO(5,SF,0);      // 3: b7





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    setIO(6,SG,0);      // 4: b3





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    setIO(7,SDP,0);     // 4: b6





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}





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/*      main





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*/





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int main() {





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    pc.printf("\nEA: Segment & Board I/O Tests\n");





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    pc.printf("\n Depress/Push Joystick to change tests at end of test cycle\n");





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    button.fall(&nextTest);





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    myled = 0;





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    spi.format(8,1);    // set format as 8b/pol:pha=0





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    spi.frequency(1000000); // default is 1mhz





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    /* curTest is advanced by the depression/push down of the Joystick */  





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    while(1) {





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     switch (curTest){





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       case 0:





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         printf("  Group Segments & RGB Led...\n");





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         groupSegs(); 





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         break;





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       case 1:  





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         printf("  March Bits b0 => b7...\n");





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         marchBits(); 





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         break;





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       case 2:  





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         printf("  March Segments SA => SG, DP...\n");





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         marchSegs(); 





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         break;





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       default: curTest = 0; break;





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     }





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   }





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}





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