InetrfaceProducts NXP
This is a simple demo code for the PCA9622_LED8x8 library. arget hardware : "I2C 8x8 LED matrix board" from Switch Science https://www.switch-science.com/catalog/2071/
Dependencies: PCA9622_LED8x8 mbed
Demo program for LED matrix.
4 patterns of moving image are available.
Since the hello world program is too simple, this program has been made for demo purpose ;)
Very simple hello world program is available here.
Import programPCA9622_LED8x8_Hello
This is a very simple sample code for the PCA9622_LED8x8 library. arget hardware : "I2C 8x8 LED matrix board" from Switch Science https://www.switch-science.com/catalog/2071/
Last commit 26 Feb 2015 by 
InetrfaceProducts NXP
Component page is available
Please refer to the component page for for more information.
I2C 8x8 LED matrix board" from Switch Science
Revision 0:fa07b945e836, committed 2014-12-03
- Comitter:
- nxp_ip
- Date:
- Wed Dec 03 08:12:38 2014 +0000
- Child:
- 1:aede5927109a
- Commit message:
- initial version
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCA9622_LED8x8.lib Wed Dec 03 08:12:38 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/nxp_ip/code/PCA9622_LED8x8/#41234a8149bd
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Dec 03 08:12:38 2014 +0000
@@ -0,0 +1,174 @@
+/**
+ * A demo code for the PCA9622 LED 8x8 library
+ *
+ * @author Tedd OKANO
+ * @version 1.0
+ * @date 03-Dec-2014
+ *
+ * This is a sample demo code for the PCA9622_LED8x8 library.
+ * Target hardware : "I2C 8x8 LED matrix board" from Switch Science
+ * https://www.switch-science.com/catalog/2071/
+ *
+ * The I2C LED controller PCA9622 is used on this module
+ * that ebables to control the LEDs with PWM brightness control.
+ *
+ * For more information about the PCA9622:
+ * http://www.nxp.com/documents/data_sheet/PCA9622.pdf
+ */
+
+#include "mbed.h"
+#include "PCA9622_LED8x8.h"
+
+// Choose a target platform from next list
+PCA9622_LED8x8 matrix( p28, p27 ); // for 40pin type mbed
+//PCA9622_LED8x8 matrix( D14, D15 ); // for Arduino type mbed
+//PCA9622_LED8x8 matrix( dp5, dp27 ); // for mbed LPC1114
+
+Ticker _ticker;
+int demo_mode = 0;
+
+void demo_mode_change();
+float func0( int x, int y, int t ); // function to make 8x8 image
+float func1( int x, int y, int t ); // function to make 8x8 image
+float func2( int x, int y, int t ); // function to make 8x8 image
+float func3( int x, int y, int t ); // function to make 8x8 image
+
+typedef float (*func_ptr)( int x, int y, int t );
+
+func_ptr fp[] = {
+ func0,
+ func1,
+ func2,
+ func3
+};
+
+int main()
+{
+ float image[ 8 ][ 8 ]; //
+ int count = 0;
+
+ _ticker.attach( &demo_mode_change, 10 );
+ matrix.start();
+
+ while(1) {
+
+ // making 8x8 image to "image" array
+ for ( int i = 0; i < 8; i++ )
+ for ( int j = 0; j < 8; j++ )
+ image[ i ][ j ] = (*fp[ demo_mode % (sizeof( fp ) / sizeof( func_ptr )) ])( i, j, count );
+
+ // set the image into library internal bufer
+ matrix.set_data( image );
+
+ count++;
+ wait( 0.05 );
+ }
+}
+
+void demo_mode_change()
+{
+ demo_mode++;
+}
+
+float func0( int x, int y, int t )
+{
+ // NXP logo
+
+ static char bm_nxp[] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+ 0xFF, 0xFF, 0xFF, 0xF0, 0x78, 0x3C, 0x1E, 0x0F,
+ 0xFF, 0x7E, 0xBD, 0xDB, 0xE7, 0x7E, 0x3C, 0x18,
+ 0x3C, 0x7E, 0xE7, 0xDB, 0xBD, 0x7E, 0xFF, 0xCC,
+ 0xCC, 0xCC, 0xCC, 0xCC, 0xFC, 0x78, 0x78,
+
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ };
+
+ int index;
+ int direction = 0;
+
+ direction = (t / (sizeof( bm_nxp ) - 8)) & 0x1;
+ index = (t % (sizeof( bm_nxp ) - 8));
+ index = direction ? (sizeof( bm_nxp ) - 8) - index : index;
+ index = index + y;
+
+ return (bm_nxp[ index ] >> (7 - x)) & 0x1;
+}
+
+float func1( int x, int y, int t )
+{
+ // ripple
+
+ const float display_offset = 3.5;
+//const float display_offset = 0.0;
+ const float size = 0.3;
+ const float eccentricity_cycle = 0.0;
+ const float eccentricity_amplitude = 0.0;
+
+ float xx;
+ float yy;
+ float tt;
+
+ float s;
+
+ xx = ((float)x - display_offset + eccentricity_amplitude * sin( (float)t * eccentricity_cycle )) * size;
+ yy = ((float)y - display_offset + eccentricity_amplitude * cos( (float)t * eccentricity_cycle )) * size;
+ tt = sin( (float)t * 0.2 ) + sin( (float)t * 0.1 );
+
+ s = cos( powf( xx * xx + yy * yy, 0.5 ) - tt );
+ return ( powf( s, 4.0 ) );
+}
+
+float func2( int x, int y, int t )
+{
+ // moving dot
+
+ const float display_offset = 3.5;
+//const float display_offset = 0.0;
+ const float size = 0.3;
+ const float eccentricity_cycle = 0.25;
+ const float eccentricity_amplitude = 2.5;
+
+ float xx;
+ float yy;
+ float tt;
+ float s;
+ float d;
+
+
+ xx = ((float)x - display_offset + eccentricity_amplitude * sin( (float)t * eccentricity_cycle )) * size;
+ yy = ((float)y - display_offset + eccentricity_amplitude * cos( (float)t * eccentricity_cycle )) * size;
+ tt = (float)t * 0.2;
+ d = powf( xx * xx + yy * yy, 0.5 ) - tt * 0.0;
+ d = d == 0.0 ? 1e-12 : d;
+ d *= 4.0;
+
+ s = sin( d ) / d;
+ return ( powf( s, 4.0 ) );
+}
+
+float func3( int x, int y, int t )
+{
+ // ripple with offset
+
+ const float display_offset = 3.5;
+//const float display_offset = 0.0;
+ const float size = 0.3;
+ const float eccentricity_cycle = 0.25;
+ const float eccentricity_amplitude = 2.5;
+
+ float xx;
+ float yy;
+ float tt;
+
+ float s;
+
+ xx = ((float)x - display_offset + eccentricity_amplitude * sin( (float)t * eccentricity_cycle )) * size;
+ yy = ((float)y - display_offset + eccentricity_amplitude * cos( (float)t * eccentricity_cycle )) * size;
+ tt = (float)t * 0.2;
+
+ s = cos( powf( xx * xx + yy * yy, 0.5 ) - tt );
+ return ( powf( s, 4.0 ) );
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Dec 03 08:12:38 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5 \ No newline at end of file