jim hamblen
Shiftbrite sequencer demo program. Controls a chain of 35 shiftbrites
Diff: main.cpp
- Revision:
- 0:fc0ddaee005d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Apr 21 15:03:38 2011 +0000
@@ -0,0 +1,414 @@
+#include "mbed.h"
+// Shiftbrite Sequencer Demo Program
+//
+//Bits for Shiftbrite latch and enable pins
+DigitalOut latch(p15);
+DigitalOut enable(p16);
+//DigitalOut myled(LED1);
+
+// SPI connections for LED chain
+SPI spi(p11, p12, p13);
+
+//Serial PC(USBTX, USBRX);
+
+Timer time_counter;
+
+// number of LEDS in chain
+#define num_LEDS 35
+
+// number of color values to sequence through
+#define Sequence_Length 17
+
+// number of steps in fade effect
+#define Fade_Steps 64
+
+
+// Each LED'S RGB color values for each step in sequence is stored in an array
+int LED_Color [Sequence_Length][num_LEDS][3] = {0};
+
+// delay times in seconds for each RGB color value in sequence
+// can be different for each sequence step
+float Sequence_Delay[Sequence_Length];
+int Sequence_Effect[Sequence_Length] = {0};
+
+
+// Write (Shift out) 10-bit RGB values to a single LED
+void Write_LED(int red, int green, int blue) {
+ unsigned int low_color=0;
+ unsigned int high_color=0;
+ red=red;
+ green=green;
+ blue=blue;
+ high_color=(blue<<4)|((red&0x3C0)>>6);
+ low_color=(((red&0x3F)<<10)|(green));
+ spi.write(high_color);
+ spi.write(low_color);
+}
+// Sends Initial Current limits to all LEDs in array
+// used to correct for different RGB brightness levels in LEDs
+void Write_Init_Command(int red_level, int green_level, int blue_level) {
+ unsigned int Init_Command = 0x40000000;
+ int i=0;
+ Init_Command = 0x40000000|(blue_level<<20)|(red_level<<10)|green_level;
+ for (i=0; i<num_LEDS; i++) {
+ spi.write(Init_Command>>16&0xFFFF);
+ spi.write(Init_Command&0xFFFF);
+ }
+ wait(.000015);
+ latch=1;
+ wait(.000015);
+ latch=0;
+}
+
+// Sets all LEDs in a sequence step to a default background color
+void Set_Background_Color(int Seq_Step, int red, int green, int blue) {
+ int i=0;
+ for (i=0; i<num_LEDS; i++) {
+ LED_Color[Seq_Step][i][0] = red;
+ LED_Color[Seq_Step][i][1] = green;
+ LED_Color[Seq_Step][i][2] = blue;
+ }
+}
+
+// Set a single LED in a Sequence Step to a color
+// Last LED in chain is LED #0
+//
+// LED address in 5x7 array
+// 35 in chain serpantine style
+// 34 33 32 31 30 29 28
+// 27 26 25 24 23 22 21
+// 20 19 18 17 16 15 14
+// 13 12 11 10 09 08 07
+// 06 05 04 03 02 01 00
+void Set_LED_Color(int Seq_Step, int LED_num, int red, int green, int blue) {
+ LED_Color[Seq_Step][LED_num][0] = red;
+ LED_Color[Seq_Step][LED_num][1] = green;
+ LED_Color[Seq_Step][LED_num][2] = blue;
+}
+
+int main() {
+ int i=0;
+ int j=0;
+ int k=0;
+ int red, green, blue;
+ bool odd=false;
+ spi.format(16,0);
+ spi.frequency(500000);
+ enable=0;
+ latch=0;
+ int flicker = 0;
+ // Set currents using Allegro A6281's command mode
+ Write_Init_Command(120, 100, 100);
+ // Do once during initialization
+ // OK at power on, but a reset could set it to an invalid mode
+ //
+ // See page 7 in A6281 datasheet
+ // This feature can be used to adjust for different LED
+ // brightness levels - values suggested from Macetech doc
+
+// Clear out initial sequence values
+ for (i=0; i<Sequence_Length; i++) {
+ for (j=0; j<num_LEDS; j++) {
+ for (k=0; k<4; k++) {
+ LED_Color[i][j][k]=0;
+ }
+ }
+ Sequence_Delay[i]=0;
+ Sequence_Effect[i]=0;
+ }
+// Color data values for LEDs to sequence through
+// Sequence step 0
+ Set_Background_Color(0, 1023, 0, 0); //LEDs RED
+ Sequence_Delay[0] = 1;
+ Sequence_Effect[0] = 0;
+// Sequence step 1
+ LED_Color[1][0][0] = 0;
+ Set_Background_Color(1, 0, 1023, 0); //LEDs GREEN
+ Sequence_Delay[1] = 2;
+ Sequence_Effect[1] = 1; //Fade from RED to GREEN Effect
+// Sequence step 2
+ Set_Background_Color(2, 0, 0, 1023); //LEDs BLUE
+ Sequence_Delay[2] = 2;
+ Sequence_Effect[2] = 1; //Fade from GREEN to BLUE Effect
+// Sequence step 3
+ Set_Background_Color(3, 0, 0, 1023);
+ Sequence_Delay[3] = 1; //Stay at this value for 1 seconds
+ Sequence_Effect[3] = 0;
+// Sequence step 4
+ Set_Background_Color(4,1023,200,0); //LEDs all ORANGE
+ Sequence_Delay[4] = 5;
+ Sequence_Effect[4] = 2; //Flicker or Twinkle Effect
+// Sequence step 5
+ Set_Background_Color(5,1023,1023,0); //LEDs all YELLOW
+ Sequence_Delay[5] = 5;
+ Sequence_Effect[5] = 3; //Flashing Marquee Sign Effect
+// Sequence step 6
+ LED_Color[6][0][0] = 1023; //LED 0 RED
+ LED_Color[6][0][1] = 0;
+ LED_Color[6][0][2] = 0;
+ LED_Color[6][1][0] = 1023;
+ LED_Color[6][1][1] = 1023;
+ LED_Color[6][1][2] = 1023; //LED 1 WHITE
+ LED_Color[6][2][0] = 0;
+ LED_Color[6][2][1] = 0;
+ LED_Color[6][2][2] = 1023; //LED 1 BLUE
+ Sequence_Delay[6] = 5;
+ Sequence_Effect[6] = 4; //Shift Colors
+// Sequence step 7
+ Set_Background_Color(7,1023,1023,1023); //LEDs all WHITE
+ Sequence_Delay[7] = 1;
+ Sequence_Effect[7] = 0;
+//Sequence step 8
+ Set_Background_Color(8,0,0,0); //LEDs all Black
+ Sequence_Delay[8] = 2;
+ Sequence_Effect[8]= 1; //Fade to Black
+//Sequence step 9
+ Set_Background_Color(9,0,0,0); //LEDs all Black
+ Sequence_Delay[9] = 1.5;
+ Sequence_Effect[9]= 0;
+//Sequence step 10
+ Sequence_Delay[10] = 6;
+ Sequence_Effect[10]= 5; //Random Bright Colors
+//Sequence step 11
+ Set_Background_Color(11,100,100,100); //LEDs all dim WHITE
+ Set_LED_Color(11,34,0,0,1023); //char M
+ Set_LED_Color(11,33,0,0,1023);
+ Set_LED_Color(11,32,0,0,1023);
+ Set_LED_Color(11,31,0,0,1023);
+ Set_LED_Color(11,30,0,0,1023);
+ Set_LED_Color(11,29,0,0,1023);
+ Set_LED_Color(11,28,0,0,1023);
+ Set_LED_Color(11,22,0,0,1023);
+ Set_LED_Color(11,16,0,0,1023);
+ Set_LED_Color(11,17,0,0,1023);
+ Set_LED_Color(11,8,0,0,1023);
+ Set_LED_Color(11,0,0,0,1023);
+ Set_LED_Color(11,1,0,0,1023);
+ Set_LED_Color(11,2,0,0,1023);
+ Set_LED_Color(11,3,0,0,1023);
+ Set_LED_Color(11,4,0,0,1023);
+ Set_LED_Color(11,5,0,0,1023);
+ Set_LED_Color(11,6,0,0,1023);
+ Sequence_Effect[11] = 0;
+ Sequence_Delay[11] = 3;
+//Sequence step 12
+ Set_Background_Color(12,100,100,100); //LEDs all dim WHITE
+ Set_LED_Color(12,34,0,0,1023); // char b
+ Set_LED_Color(12,33,0,0,1023);
+ Set_LED_Color(12,32,0,0,1023);
+ Set_LED_Color(12,31,0,0,1023);
+ Set_LED_Color(12,30,0,0,1023);
+ Set_LED_Color(12,29,0,0,1023);
+ Set_LED_Color(12,28,0,0,1023);
+ Set_LED_Color(12,27,0,0,1023);
+ Set_LED_Color(12,24,0,0,1023);
+ Set_LED_Color(12,20,0,0,1023);
+ Set_LED_Color(12,17,0,0,1023);
+ Set_LED_Color(12,12,0,0,1023);
+ Set_LED_Color(12,11,0,0,1023);
+ Sequence_Effect[12] = 0;
+ Sequence_Delay[12] = 3;
+ //Sequence step 13
+ Set_Background_Color(13,100,100,100); //LEDs all dim WHITE
+ Set_LED_Color(13,34,0,0,1023); //char E
+ Set_LED_Color(13,33,0,0,1023);
+ Set_LED_Color(13,32,0,0,1023);
+ Set_LED_Color(13,31,0,0,1023);
+ Set_LED_Color(13,30,0,0,1023);
+ Set_LED_Color(13,29,0,0,1023);
+ Set_LED_Color(13,28,0,0,1023);
+ Set_LED_Color(13,27,0,0,1023);
+ Set_LED_Color(13,24,0,0,1023);
+ Set_LED_Color(13,21,0,0,1023);
+ Set_LED_Color(13,20,0,0,1023);
+ Set_LED_Color(13,17,0,0,1023);
+ Set_LED_Color(13,14,0,0,1023);
+ Set_LED_Color(13,13,0,0,1023);
+ Set_LED_Color(13,7,0,0,1023);
+ Set_LED_Color(13,6,0,0,1023);
+ Set_LED_Color(13,0,0,0,1023);
+ Sequence_Effect[13] = 0;
+ Sequence_Delay[13] = 3;
+ //Sequence step 14
+ Set_Background_Color(14,100,100,100); //LEDs all dim WHITE
+ Set_LED_Color(14,5,0,0,1023); //char d
+ Set_LED_Color(14,4,0,0,1023);
+ Set_LED_Color(14,3,0,0,1023);
+ Set_LED_Color(14,6,0,0,1023);
+ Set_LED_Color(14,2,0,0,1023);
+ Set_LED_Color(14,1,0,0,1023);
+ Set_LED_Color(14,0,0,0,1023);
+ Set_LED_Color(14,13,0,0,1023);
+ Set_LED_Color(14,10,0,0,1023);
+ Set_LED_Color(14,20,0,0,1023);
+ Set_LED_Color(14,17,0,0,1023);
+ Set_LED_Color(14,26,0,0,1023);
+ Set_LED_Color(14,25,0,0,1023);
+ Sequence_Effect[14] = 0;
+ Sequence_Delay[14] = 3;
+ //Sequence step 15
+ Set_Background_Color(15,0,0,0); //LEDs all Black
+ Sequence_Delay[15] = 2;
+ Sequence_Effect[15]= 1; //Fade to Black
+ //Sequence step 16
+ Set_Background_Color(16,0,0,0); //LEDs all Black
+ Sequence_Delay[16] = 2;
+ Sequence_Effect[16]= 0; //Black
+// add more steps or LEDs if needed and change #defines
+
+ wait(1);
+ // Repeat Sequence Forever
+ while (1) {
+ Write_Init_Command(120, 100, 100);
+ //Step through the Sequence Values
+ for (j = 0; j < Sequence_Length; j++) {
+ // myled= !myled;
+ switch (Sequence_Effect[j]) {
+ case 0: {
+ // Step through each LED in chain at each sequence step
+ for (i = 0; i < num_LEDS; i++) {
+ //Writes 32-bits of RGB color data to LED using SPI hardware
+ Write_LED( LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ // Uncomment to get status info on serial port
+ // printf("i= %d, j= %d\n\r",i,j);
+ // printf(" %d %d %d\n\r",LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ }
+ //Load in new values just shifted out to LED chain by setting latch high
+ wait(.000015);
+ latch=1;
+ wait(.000015);
+ latch=0;
+ //Delay for this step in the sequence
+ wait(Sequence_Delay[j]);
+ break;
+ }
+ case 1: {
+ //Lighing Effect: Fade into new color from previous color (note: can't fade first sequence step!)
+ for (k = 0; k<=Fade_Steps; k++) {
+ // Step through each LED in chain at each fade sequence step
+ for (i = 0; i < num_LEDS; i++) {
+ red = LED_Color[j-1][i][0] + k*(LED_Color[j][i][0]-LED_Color[j-1][i][0])/Fade_Steps;
+ green = LED_Color[j-1][i][1] + k*(LED_Color[j][i][1]-LED_Color[j-1][i][1])/Fade_Steps;
+ blue = LED_Color[j-1][i][2] + k*(LED_Color[j][i][2]-LED_Color[j-1][i][2])/Fade_Steps;
+ //Writes 32-bits of RGB color data to LED using SPI hardware
+ Write_LED(red, green, blue);
+ // Uncomment to get status info on serial port
+ // printf("i= %d, j= %d\n\r",i,j);
+ // printf(" %d %d %d\n\r",LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ }
+ //Load in new values just shifted out to LED chain by setting latch high
+ wait(.000015);
+ latch=1;
+ wait(.000015);
+ latch=0;
+ //Delay for this step in the fade sequence
+ wait(Sequence_Delay[j]/Fade_Steps);
+ }
+ break;
+ }
+ case 2: {
+ //Lighting Effect: Flicker or Twinkle somewhat like a flame
+ time_counter.reset();
+ time_counter.start();
+ while (time_counter.read()<Sequence_Delay[j]) {
+ for (i = 0; i < num_LEDS; i++) {
+ flicker = rand();
+ if (flicker>0x40000000)
+ //Writes 32-bits of RGB color data to LED using SPI hardware
+ Write_LED( LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ // Uncomment to get status info on serial port
+ // printf("i= %d, j= %d\n\r",i,j);
+ // printf(" %d %d %d\n\r",LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ else
+ Write_LED( LED_Color[j][i][0]/2, LED_Color[j][i][1]/2, LED_Color[j][i][2]/2);
+ }
+ //Load in new values just shifted out to LED chain by setting latch high
+ wait(.000015);
+ latch=1;
+ wait(.000015);
+ latch=0;
+ wait(.05);
+ }
+ time_counter.stop();
+ break;
+ }
+ case 3: {
+ //Lighting Effect: Flashing Broadway Marquee Sign Style
+ time_counter.reset();
+ time_counter.start();
+ while (time_counter.read()<Sequence_Delay[j]) {
+ for (i = 0; i < num_LEDS; i++) {
+ if (((i+odd)&0x01)==0)
+ //Writes 32-bits of RGB color data to LED using SPI hardware
+ Write_LED( LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ // Uncomment to get status info on serial port
+ // printf("i= %d, j= %d\n\r",i,j);
+ // printf(" %d %d %d\n\r",LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ else
+ Write_LED( LED_Color[j][i][0]/4, LED_Color[j][i][1]/4, LED_Color[j][i][2]/4);
+ }
+ //Load in new values just shifted out to LED chain by setting latch high
+ wait(.000015);
+ latch=1;
+ wait(.000015);
+ latch=0;
+ wait(.15);
+ odd = !odd;
+ }
+ time_counter.stop();
+ break;
+ }
+ case 4: {
+ //Lighting Effect: Circular Shift of Colors
+ time_counter.reset();
+ time_counter.start();
+ k=0;
+ while (time_counter.read()<Sequence_Delay[j]) {
+ k = (k+1)%num_LEDS;
+ for (i = 0; i < num_LEDS; i++) {
+
+ //Writes 32-bits of RGB color data to LED using SPI hardware
+ Write_LED( LED_Color[j][(i+k)%num_LEDS][0], LED_Color[j][(i+k)%num_LEDS][1], LED_Color[j][(i+k)%num_LEDS][2]);
+ // Uncomment to get status info on serial port
+ // printf("i= %d, j= %d\n\r",i,j);
+ // printf(" %d %d %d\n\r",LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ }
+ //Load in new values just shifted out to LED chain by setting latch high
+ wait(.000015);
+ latch=1;
+ wait(.000015);
+ latch=0;
+ wait(.10);
+ }
+ time_counter.stop();
+ break;
+ case 5: {
+ //Random Bright Colors
+ time_counter.reset();
+ time_counter.start();
+ k=0;
+ while (time_counter.read()<Sequence_Delay[j]) {
+ k = (k+1)%num_LEDS;
+ for (i = 0; i < num_LEDS; i++) {
+
+ //Writes 32-bits of RGB color data to LED using SPI hardware
+ Write_LED( (rand()&0x00F000)>>6,(rand()&0x00F000)>>6,(rand()&0x00F000)>>6);
+ // Uncomment to get status info on serial port
+ // printf("i= %d, j= %d\n\r",i,j);
+ // printf(" %d %d %d\n\r",LED_Color[j][i][0], LED_Color[j][i][1], LED_Color[j][i][2]);
+ }
+ //Load in new values just shifted out to LED chain by setting latch high
+ wait(.000015);
+ latch=1;
+ wait(.000015);
+ latch=0;
+ wait(.08);
+ }
+ time_counter.stop();
+ break;
+ }
+ }
+ }
+ }
+ }
+}
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