EmbeddedArtists AB
/
lpc812_exp_solution_7-segment-shift
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Dependencies: lpc812_exp_lib_PCF8591 mbed
Revision 0:a41af9f7fe16, committed 2013-11-22
- Comitter:
- embeddedartists
- Date:
- Fri Nov 22 14:12:41 2013 +0000
- Commit message:
- First version
Changed in this revision
diff -r 000000000000 -r a41af9f7fe16 lpc812_exp_lib_PCF8591.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lpc812_exp_lib_PCF8591.lib Fri Nov 22 14:12:41 2013 +0000 @@ -0,0 +1,1 @@ +https://mbed.org/users/embeddedartists/code/lpc812_exp_lib_PCF8591/#53bf66c0e0f6
diff -r 000000000000 -r a41af9f7fe16 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Nov 22 14:12:41 2013 +0000
@@ -0,0 +1,89 @@
+#include "mbed.h"
+
+DigitalOut ssel(D10);
+DigitalOut mosi(D11);
+DigitalOut sclk(D13);
+
+#define SEG_A 0x80
+#define SEG_B 0x40
+#define SEG_C 0x20
+#define SEG_D 0x10
+#define SEG_E 0x08
+#define SEG_F 0x04
+#define SEG_G 0x02
+#define SEG_DP 0x01
+
+const uint8_t segments[16] = {
+ SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F , //0 = A,B,C,D,E,F
+ SEG_B | SEG_C , //1 = B,C
+ SEG_A | SEG_B | SEG_D | SEG_E | SEG_G, //2 = A,B,D,E,G
+ SEG_A | SEG_B | SEG_C | SEG_D | SEG_G, //3 = A,B,C,D,G
+ SEG_B | SEG_C | SEG_F | SEG_G, //4 = B,C,F,G
+ SEG_A | SEG_C | SEG_D | SEG_F | SEG_G, //5 = A,C,D,F,G
+ SEG_A | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, //6 = A,C,D,E,F,G
+ SEG_A | SEG_B | SEG_C , //7 = A,B,C
+ SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, //8 = A,B,C,D,E,F,G
+ SEG_A | SEG_B | SEG_C | SEG_D | SEG_F | SEG_G, //9 = A,B,C,D,F,G
+ SEG_A | SEG_B | SEG_C | SEG_E | SEG_F | SEG_G, //A = A,B,C,E,F,G
+ SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, //B = C,D,E,F,G
+ SEG_D | SEG_E | SEG_G, //C = D,E,G
+ SEG_B | SEG_C | SEG_D | SEG_E | SEG_G, //D = B,C,D,E,G
+ SEG_A | SEG_D | SEG_E | SEG_F | SEG_G, //E = A,D,E,F,G
+ SEG_A | SEG_E | SEG_F | SEG_G}; //F = A,E,F,G
+
+static void updateShiftReg(uint8_t segments)
+{
+ uint8_t bitCnt;
+
+ //Pull SCK and MOSI low, pull SSEL low
+ ssel = 0;
+ mosi = 0;
+ sclk = 0;
+
+ //wait 1us
+ wait_us(1);
+
+ //Loop through all eight bits
+ for (bitCnt = 0; bitCnt < 8; bitCnt++)
+ {
+ //output MOSI value (depends on bit 7 of "segments")
+ if (segments & 0x80) {
+ mosi = 1;
+ } else {
+ mosi = 0;
+ }
+
+ //wait 1us
+ wait_us(1);
+
+ //pull SCK high
+ sclk = 1;
+
+ //wait 1us
+ wait_us(1);
+
+ //pull SCK low
+ sclk = 0;
+
+ //shift "segments"
+ segments = segments << 1;
+ }
+
+ //Pull SSEL high
+ ssel = 1;
+}
+
+static void experiment3()
+{
+ while(1) {
+ for (int i = 0; i < 16; i++) {
+ updateShiftReg(~segments[i]);
+ wait(0.4);
+ }
+ }
+}
+
+int main()
+{
+ experiment3();
+}
\ No newline at end of file
diff -r 000000000000 -r a41af9f7fe16 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Nov 22 14:12:41 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/a9913a65894f \ No newline at end of file