kulwant singh
This library helps to interface Max7912 with Wiznet w7500 and display different character/digit/string on Dot Matrix LED.
Diff: max7219.cpp
- Revision:
- 0:2c4e3799881a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/max7219.cpp Fri Aug 03 06:43:16 2018 +0000
@@ -0,0 +1,334 @@
+#include "max7219.h"
+
+DigitalOut cs(D8);
+
+SPI spi(PA_08, NC, PA_06);
+
+char max[]={0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08};
+
+char temp[100];
+char ch[]={
+ 0x1c,0x22,0x22,0x32,0x2a,0x26,0x22,0x1c, //0
+ 0x3e,0x08,0x08,0x08,0x08,0x0a,0x0c,0x08, //1
+ 0x3e,0x02,0x04,0x08,0x10,0x20,0x22,0x1c, //2
+ 0x1e,0x20,0x20,0x1c,0x1c,0x20,0x20,0x1e, //3
+ 0x20,0x20,0x20,0x3e,0x22,0x24,0x28,0x30,//4
+ 0x1c,0x22,0x20,0x20,0x1e,0x02,0x02,0x3e,//5
+ 0x1c,0x22,0x22,0x1e,0x02,0x02,0x22,0x1c,//6
+ 0x04,0x04,0x08,0x08,0x10,0x10,0x20,0x3e,//7
+ 0x1c,0x22,0x22,0x3e,0x3e,0x22,0x22,0x1c,//8
+ 0x1c,0x22,0x20,0x20,0x3c,0x22,0x22,0x1c,//9
+
+
+ //Symbol needs to be defined
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+
+ 0x24,0x24,0x24,0x3c,0x3c,0x24,0x24,0x18,//A
+ 0x1e,0x22,0x22,0x1e,0x1e,0x22,0x22,0x1e,//B
+ 0x3c,0x02,0x02,0x02,0x02,0x02,0x02,0x3c,//C
+ 0x1e,0x22,0x22,0x22,0x22,0x22,0x22,0x1e,//D
+ 0x3e,0x02,0x02,0x3e,0x3e,0x02,0x02,0x3e,//E
+ 0x02,0x02,0x02,0x3e,0x3e,0x02,0x02,0x3e,//F
+ 0x2c,0x2a,0x2a,0x3a,0x02,0x02,0x22,0x1c,//G
+ 0x22,0x22,0x22,0x3e,0x3e,0x22,0x22,0x22,//H
+ 0x3e,0x08,0x08,0x08,0x08,0x08,0x08,0x3e,//I
+ 0x1c,0x12,0x10,0x10,0x10,0x10,0x10,0x7c,//J
+ 0x22,0x12,0x0a,0x06,0x06,0x0a,0x12,0x22,//K
+ 0x3e,0x02,0x02,0x02,0x02,0x02,0x02,0x02,//L
+ 0x42,0x42,0x42,0x42,0x5a,0x5a,0x66,0x42,//M
+ 0x42,0x62,0x72,0x5a,0x4e,0x46,0x42,0x42,//N
+ 0x1c,0x22,0x22,0x22,0x22,0x22,0x22,0x1c,//O
+ 0x02,0x02,0x02,0x1e,0x22,0x22,0x22,0x1e,//P
+ 0x7c,0x32,0x2e,0x22,0x22,0x22,0x22,0x1c,//Q
+ 0x22,0x12,0x0a,0x06,0x1e,0x22,0x22,0x1e,//R
+ 0x1c,0x22,0x30,0x18,0x0c,0x06,0x22,0x1c,//S
+ 0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x3e,//T
+ 0x1c,0x22,0x22,0x22,0x22,0x22,0x22,0x22,//U
+ 0x08,0x1c,0x36,0x22,0x22,0x22,0x22,0x22,//V
+ 0x36,0x2a,0x2a,0x2a,0x22,0x22,0x22,0x22,//W
+ 0x42,0x42,0x24,0x18,0x18,0x24,0x42,0x42,//X
+ 0x08,0x08,0x08,0x08,0x1c,0x22,0x22,0x22,//Y
+ 0x7e,0x02,0x04,0x08,0x10,0x20,0x40,0x7e,//Z
+
+ //Symbol needs to be defined
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+ 0x38,0x24,0x24,0x38,0x20,0x1c,0x00,0x00,//a
+ 0x1e,0x22,0x22,0x1e,0x02,0x02,0x02,0x00,//b
+ 0x1c,0x02,0x02,0x02,0x02,0x1c,0x00,0x00,//c
+ 0x3c,0x22,0x22,0x3c,0x20,0x20,0x20,0x00,//d
+ 0x1c,0x22,0x02,0x1e,0x22,0x1c,0x00,0x00,//e
+ 0x04,0x04,0x04,0x0e,0x04,0x14,0x0c,0x00,//f
+ 0x1c,0x12,0x10,0x1c,0x12,0x12,0x1c,0x00,//g
+ 0x12,0x12,0x12,0x1e,0x02,0x02,0x02,0x00,//h
+ 0x18,0x08,0x08,0x08,0x08,0x00,0x08,0x00,//i
+ 0x18,0x08,0x08,0x08,0x08,0x00,0x08,0x00,//j
+ 0x12,0x0a,0x06,0x0a,0x12,0x02,0x02,0x00,//k
+ 0x1c,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//l
+ 0x2a,0x2a,0x2a,0x2a,0x36,0x00,0x00,0x00,//m
+ 0x22,0x22,0x22,0x26,0x1a,0x00,0x00,0x00,//n
+ 0x1c,0x22,0x22,0x22,0x1c,0x00,0x00,0x00,//o
+ 0x02,0x02,0x0e,0x12,0x12,0x0e,0x02,0x00,//p
+ 0x10,0x30,0x50,0x1c,0x12,0x12,0x1c,0x00,//q
+ 0x02,0x02,0x02,0x22,0x26,0x1a,0x00,0x00,//r
+ 0x18,0x24,0x10,0x08,0x24,0x18,0x00,0x00,//s
+ 0x08,0x14,0x04,0x04,0x1e,0x04,0x04,0x00,//t
+ 0x1c,0x22,0x22,0x22,0x22,0x00,0x00,0x00,//u
+ 0x08,0x14,0x22,0x22,0x22,0x00,0x00,0x00,//v
+ 0x14,0x2a,0x2a,0x2a,0x2a,0x00,0x00,0x00,//w
+ 0x22,0x14,0x08,0x14,0x22,0x00,0x00,0x00,//x
+ 0x18,0x24,0x20,0x38,0x24,0x24,0x00,0x00,//y
+ 0x3e,0x04,0x08,0x10,0x3e,0x00,0x00,0x00,//z
+ };
+
+max7219::max7219()
+{
+
+ }
+
+max7219::~max7219()
+{
+
+
+ }
+
+
+ void max7219::init()
+ {
+
+ spi.format(8,3);
+
+ spi.frequency(1000000);
+
+ // max7219_reg_scanLimit
+ cs=0;
+ spi.write(0x0B);
+ spi.write(0x07);
+ cs=1;
+
+ // max7219_reg_decodeMode
+ cs=0;
+ spi.write(0x09);
+ spi.write(0x00);
+ cs=1;
+
+
+
+ // Disable shutdown mode
+ cs=0;
+ spi.write(0x0C);
+ spi.write(0x01);
+ cs=1;
+
+ //display test
+ cs=0;
+ spi.write(0x0F);
+ spi.write(0x01);
+ cs=1;
+ wait(1);
+
+ // normal operation
+ cs=0;
+ spi.write(0x0F);
+ spi.write(0x00);
+ cs=1;
+
+ cs=0;
+ spi.write(0x0A);
+ spi.write(0x0F);
+ cs=1;
+
+ // To blank all the devices
+ for(int i=0;i<8; i++)
+ {
+ cs=0;
+ spi.write(max[i]);
+ spi.write(0x00);
+ cs=1;
+ }
+
+}
+
+void max7219::send(char* read)
+{
+
+
+
+ int k=0,j,c;
+ while(read[k]!='\0')
+{
+ k++;
+
+
+}
+switch(k){
+
+
+ case 0: for(int i=0;i<8; i++)
+ {
+ cs=0;
+ spi.write(max[i]);
+ spi.write(0x00);
+ cs=1;
+ }
+ break;
+
+ case 1:
+ for (j=0;j<k;j++){
+
+ for(int i=0;i<8;i++)
+ {
+ cs=0;
+ spi.write(max[i]);
+ spi.write(ch[((read[j]-48)*8)+i]);
+
+ for (c=j;c>0;c--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+ cs=1;
+
+ }
+}
+for(int y=3;y>0;y--){
+for(int i=0;i<8;i++)
+{ cs=0;
+ spi.write(max[i]);
+ spi.write(0x00);
+ for (int l=y;l>0;l--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+ cs=1;
+
+ }}
+break;
+
+case 2:
+for (j=0;j<k;j++){
+
+ for(int i=0;i<8;i++)
+ {
+ cs=0;
+ spi.write(max[i]);
+ spi.write(ch[((read[j]-48)*8)+i]);
+
+ for (c=j;c>0;c--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+ cs=1;
+
+ }
+}
+for(int y=3;y>1;y--){
+for(int i=0;i<8;i++)
+{
+ cs=0;
+ spi.write(max[i]);
+ spi.write(0x00);
+ for (int l=y;l>0;l--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+
+ cs=1;
+ }}
+break;
+
+case 3:
+for (j=0;j<k;j++){
+ for(int i=0;i<8;i++)
+ {
+ cs=0;
+ spi.write(max[i]);
+ spi.write(ch[((read[j]-48)*8)+i]);
+
+ for (c=j;c>0;c--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+ cs=1;
+
+ }
+}
+for(int i=0;i<8;i++)
+{
+ cs=0;
+ spi.write(max[i]);
+ spi.write(0x00);
+ for (int l=3;l>0;l--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+ cs=1;
+
+ }
+break;
+
+
+ case 4:
+for (j=0;j<k;j++){
+
+ for(int i=0;i<8;i++)
+ {
+ cs=0;
+ spi.write(max[i]);
+ spi.write(ch[((read[j]-48)*8)+i]);
+
+ for (c=j;c>0;c--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+ cs=1;
+
+ }
+}
+break;
+}
+}
+
+
+void max7219::sendstring(char* read)
+{
+ int j=0,o=0;
+ for(int i=0;i<32;i++)
+{
+
+ cs=0;
+ spi.write(max[j]);
+ spi.write(read[i]);
+ for(int m=o;m>0;m--)
+ {
+ spi.write(0x00);
+ spi.write(0x00);
+ }
+ cs=1;
+ j++;
+if(j>7)
+{
+ j=0;
+ o++;
+ }
+
+}
+}