Daniel Worrall
6 x 7 segment display library for PCA9637 driven breakout board
Dependents: FTSE100 InternetDispBoB digitalThermometer Counter ... more
Revision 12:2235c72db927, committed 2011-07-01
- Comitter:
- d_worrall
- Date:
- Fri Jul 01 16:28:56 2011 +0000
- Parent:
- 11:5e97be74f4d1
- Child:
- 13:38780808dc2f
- Commit message:
- version7
Changed in this revision
| dispBoB.cpp | Show annotated file Show diff for this revision Revisions of this file |
| dispBoB.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/dispBoB.cpp Fri Jul 01 08:28:28 2011 +0000
+++ b/dispBoB.cpp Fri Jul 01 16:28:56 2011 +0000
@@ -6,26 +6,27 @@
#include "PCA9635.h"
#include "dispBoB.h"
+
static const char loc[] = {0x02, 0x02, 0x04, 0x04, 0x10, 0x10, 0x12, 0x12};
static const short dispL[] = {
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
- 0x0000, 0x1008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0002, 0xC006, 0x600C, 0x0000, 0x0000, 0x0000, 0x0000, 0x1000, 0x0000,
+ 0x0000, 0x1008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0002, 0xC006, 0x600C, 0x0000, 0x0000, 0x0000, 0x0001, 0x1000, 0x0000,
0xE00E, 0x2008, 0xC00D, 0x600D, 0x200B, 0x6007, 0xE007, 0x200E, 0xE00F, 0x600F, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
- 0x0000, 0xF001, 0xE003, 0xC001, 0xE009, 0xC007, 0x8007, 0x600F, 0xA003, 0x8000, 0x6008, 0xA007, 0x3008, 0xA005, 0xA001, 0xE001,
- 0x800F, 0x300F, 0x8001, 0x6007, 0xC003, 0xE000, 0xE000, 0xE004, 0xA00B, 0x600B, 0xC00D, 0xC006, 0x0000, 0x600C, 0x0000, 0x4000,
+ 0x0000, 0xE00D, 0xE003, 0xC001, 0xE009, 0xC007, 0x8007, 0x600F, 0xA003, 0x8000, 0x6008, 0xA007, 0xC002, 0xA005, 0xA001, 0xE001,
+ 0x800F, 0x200F, 0x8001, 0x6007, 0xC003, 0xE000, 0xE000, 0xE004, 0xA00B, 0x600B, 0xC00D, 0xC006, 0x0000, 0x600C, 0x0000, 0x4000,
0x1000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xC006, 0x0000, 0x600C, 0x0000, 0x0000
};
static const short dispR[] = {
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
- 0x0000, 0x0180, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0020, 0x0C60, 0x06C0, 0x0000, 0x0000, 0x0000, 0x0000, 0x0100, 0x0000,
+ 0x0000, 0x0180, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0020, 0x0C60, 0x06C0, 0x0000, 0x0000, 0x0000, 0x0010, 0x0100, 0x0000,
0x0EE0, 0x0280, 0x0CD0, 0x06D0, 0x02B0, 0x0670, 0x0E70, 0x02E0, 0x0EF0, 0x06F0, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
- 0x0000, 0x0F10, 0x0E30, 0x0C10, 0x0E90, 0x0C70, 0x0870, 0x06F0, 0x0A30, 0x0800, 0x0680, 0x0A70, 0x0380, 0x0A50, 0x0A10, 0x0E10,
- 0x08F0, 0x03F0, 0x0810, 0x0670, 0x0C30, 0x0E00, 0x0E00, 0x0E40, 0x0AB0, 0x06B0, 0x0CD0, 0x0C60, 0x0000, 0x06C0, 0x0000, 0x0400,
+ 0x0000, 0x0ED0, 0x0E30, 0x0C10, 0x0E90, 0x0C70, 0x0870, 0x06F0, 0x0A30, 0x0800, 0x0680, 0x0A70, 0x0C20, 0x0A50, 0x0A10, 0x0E10,
+ 0x08F0, 0x02F0, 0x0810, 0x0670, 0x0C30, 0x0E00, 0x0E00, 0x0E40, 0x0AB0, 0x06B0, 0x0CD0, 0x0C60, 0x0000, 0x06C0, 0x0000, 0x0400,
0x0100, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0C60, 0x0000, 0x06C0, 0x0000, 0x0000
};
@@ -34,13 +35,17 @@
string nullArray = " ";
dispBoB::dispBoB(PinName sda, PinName scl, PinName en): _pca(sda, scl), _en(en) {
+ init();
+}
+void dispBoB::init(void){ //initiate - call this whenever the system needs to be reset
_en = 0;
_pca.init(loc[0]);
}
-void dispBoB::cls(void){
+void dispBoB::cls(void){ //clear screen and screen buffers
for(int j = 0; j < 8; j++){
locate(j);
+ element[j] = 0x0000;
_pca.bus(0x0000);
}
locate(0);
@@ -49,24 +54,47 @@
void dispBoB::locate(char pos){
_pca.setAddress(loc[pos]);
_cursor = pos;
- _pos = pos;
}
int dispBoB::_putc(int c){
- if(_pos>5) return -1;
+ if(_cursor>6){
+ _cursor++;
+ return -1; //skip if exceeds display size allow extra '.' in 6th >> to place in 5th
+ }
- if(_cursor & 1){
- element[_cursor] = dispR[toupper(c)];
+ if(c=='.'){ //choose not to print a '.' outside the display bounds
+ if(_cursor>6){
+ _cursor++;
+ return -1;
+ }
+ if((_cursor==0)&&((element[_cursor]&0x1000)==0x1000)) element[_cursor] = 0x0000;
+ if(_cursor!=0) _cursor--;
+ if(((element[_cursor]&0x1000)==0x1000)||((element[_cursor]&0x0100)==0x0100)){
+ _cursor++;
+ element[_cursor]=0x0000;
+ }
+ } else {
+ if(_cursor>5){ //for non '.' chars at end of line, flag up overflow and don't print
+ _cursor++;
+ return -1;
+ }
+ element[_cursor]=0x0000; //reset an element before pasting a char other than '.'
+ }
+
+ if(_cursor & 1){ //look up char >> element conversion and paste to display
+ element[_cursor] |= dispR[toupper(c)];
} else {
- element[_cursor] = dispL[toupper(c)];
+ element[_cursor] |= dispL[toupper(c)];
}
int i = _cursor/2;
- ppair[i] = element[(2*i)] + element[(2*i)+1];
- _pca.bus(ppair[i]);
+ ppair[i] = element[(2*i)] + element[(2*i)+1]; //combine left and right elements into a form readable by the PCA9635
+
+ _pca.setAddress(loc[_cursor]); //set location to paste to
+ bus(ppair[i]); //sned data tp PCA9635
- locate(_pos+1);
-
+ locate(_cursor+1); //allow cursor to be in element[6], decision of what to do
+ //is made at the start of the putc() algo. depending on char.
return c;
}
@@ -75,15 +103,19 @@
}
void dispBoB::scroll(string str, float speed){
- char buffer[6];
- str.insert(0, nullArray);
+ char buffer[12]; //instantiate a 12 element buffer array
+ str.insert(0, nullArray); //paste 6 zeros at either end of string
str.insert(str.length(), nullArray);
- for(int k = 0; k < str.length(); k++){
- str.copy(buffer, 6, k);
- locate(0);
- printf("%s", buffer);
- wait(speed);
+ for(int k = 0; k < str.length(); k++){
+ str.copy(buffer, 12, k); //mask a 12 element buffer starting at k
+ locate(0); //locate to position 0
+ printf("%s", buffer); //print buffer to display
+ if((element[0]&0x1000)==0x1000){ //if position zero has two characters i.e. char + '.'
+ if(element[0]!=0x1000)k++; //then treat as one
+ else;
+ }
+ wait(speed); //hold frame for duration of speed x milliseconds
}
}
--- a/dispBoB.h Fri Jul 01 08:28:28 2011 +0000
+++ b/dispBoB.h Fri Jul 01 16:28:56 2011 +0000
@@ -39,7 +39,12 @@
*/
dispBoB(PinName sda, PinName scl, PinName en);
- //output control
+ //Output control
+
+ /** Initialise device
+ *
+ */
+ void init(void);
/** Clear screen
*
*/
@@ -85,7 +90,6 @@
PCA9635 _pca;
DigitalOut _en;
char _cursor;
- char _pos;
};
#endif