sure_7seg.c File Reference

Routines to talk to Sure electronics seven segment displays. More...

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Functions

uns8 sure_7seg_convert (uns8 digit)
void sure_7seg_setup ()
 Setup ports and pins to communicate to Sure display.
void sure_7seg_write_str (char *data)
 Display ASCII string to 7 segment displays.

Detailed Description


Function Documentation

uns8 sure_7seg_convert ( uns8  digit  ) 

00048                                    {
00049     switch (digit) {
00050     case ' ': return 0;
00051     case '0': return 0xfc;
00052     case '1': return 0x60;
00053     case '2': return 0xda;
00054     case '3': return 0xf2;
00055     case '4': return 0x66;
00056     case '5': return 0xb6;
00057     case '6': return 0xbe;
00058     case '7': return 0xe0;
00059     case '8': return 0xfe;
00060     case '9': return 0xf6;
00061     }   
00062 }

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void sure_7seg_setup (  ) 

Set up ports and pins as appropriate to communicate via SPI to Sure 7 segment displays

00043                        {
00044     spi_setup();
00045 }

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void sure_7seg_write_str ( char *  data  ) 

Converts ASCII to the appropriate magic characters to display on a Sure 7 segment display. Only numbers 0-9 and space are implented for now.

To create your own characters, add together: 0x40 -------- | | 0x02 | | 0x20 | 0x01 | |------| | | 0x04 | | 0x10 | | -------- 0x08

00064                                      {
00065 
00066 uns8 count, digit;
00067 char converted[5];
00068 
00069     count = 0;
00070     do {
00071         digit = data[count];
00072         converted[count] = sure_7seg_convert(digit);
00073         count++;
00074        } while (count < 4);
00075     spi_write_sure(converted[3]);
00076     spi_write_sure(converted[2]);
00077     spi_write_sure(converted[1]);
00078     spi_write_sure(converted[0]);
00079 
00080     clear_pin(spi_clk_port, spi_clk_pin);   // set to low
00081     set_pin(spi_clk_port, spi_clk_pin); // set to high
00082        
00083 }

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