diff options
Diffstat (limited to 'max7219.c')
| -rw-r--r-- | max7219.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/max7219.c b/max7219.c deleted file mode 100644 index a1e0da3..0000000 --- a/max7219.c +++ /dev/null @@ -1,133 +0,0 @@ -/************************************************************************/
-/* */
-/* 7 Segment Driver MAX7219 */
-/* Common Anode Display */
-/* */
-/* Author: Peter Dannegger */
-/* danni@specs.de */
-/* */
-/************************************************************************/
-
-#include "main.h"
-#include "max7219.h"
-
-u8 brightness = 5;
-
-u8 code digits[] = { DIGITS };
-
-u8 displaymem[8] = { CHAR_SPACE, // 8 digits, msb first
- CHAR_SPACE,
- CHAR_SPACE,
- CHAR_SPACE,
- CHAR_SPACE,
- CHAR_SPACE,
- CHAR_SPACE,
- CHAR_SPACE };
-
-u8 code charset[] = { // Definition Character Set
- _A+_B+_C+_D+_E+_F , // CHAR_0
- _B+_C , // CHAR_1
- _A+_B+ _D+_E+ _G, // CHAR_2
- _A+_B+_C+_D+ _G, // CHAR_3
- _B+_C+ _F+_G, // CHAR_4
- _A+ _C+_D+ _F+_G, // CHAR_5
- _A+ _C+_D+_E+_F+_G, // CHAR_6
- _A+_B+_C , // CHAR_7
- _A+_B+_C+_D+_E+_F+_G, // CHAR_8
- _A+_B+_C+_D +_F+_G, // CHAR_9
- _A+_B+_C+ _E+_F+_G, // CHAR_A
- _C+_D+_E+_F+_G, // CHAR_b
- _D+_E+ _G, // CHAR_c ;'c'
- _B+_C+_D+_E+ _G, // CHAR_d
- _A+ _D+_E+_F+_G, // CHAR_E
- _A+ _E+_F+_G, // CHAR_F
- 0 , // 16 = SPACE
- _G, // 17 = MINUS
- _A+_B+ _F+_G, // 18 = GRAD
- _A+ _D+_E+_F , // 19 = CHAR_C2 ;'C'
- _E+ _G, // 20 = CHAR_r
- _C+_D+_E+ _G, // 21 = CHAR_o
- _B+_C+ _E+_F+_G, // 22 = H
- _D+_E+_F , // 23 = L
- _D , // 24 = _
- _A , // 25 = upper "-"
- _A+_B+ _E+_F+_G, // CHAR_P
- _B+_C+_D+_E+_F , // CHAR_U
- _A+_B+_C+ _E+_F // CHAR_M
- };
-
-
-void display_write( u16 dc )
-{
- u8 i;
-
- MAX7219_DDR |= 1<<MAX7219_DO;
- MAX7219_DDR |= 1<<MAX7219_SCK;
- MAX7219_DDR |= 1<<MAX7219_STB;
- MAX7219_PORT &= ~(1<<MAX7219_STB);
-
- for( i = 12; i; i-- ){
- MAX7219_PORT &= ~(1<<MAX7219_SCK);
- MAX7219_PORT |= 1<<MAX7219_DO;
- if( (dc & 0x0800) == 0 )
- MAX7219_PORT &= ~(1<<MAX7219_DO);
- dc <<= 1;
- MAX7219_PORT |= 1<<MAX7219_SCK;
- }
-
- MAX7219_PORT |= 1<<MAX7219_STB;
-}
-
-
-void display_out( void )
-{
- u8 * dptr;
- u8 i, j, byte;
-
- display_write( 0xC01 );
-
- dptr = displaymem;
- for( i = 8; i; i-- ){
- j = LPM(charset + (*dptr & 0x3F)); // convert to 7-segment
- if( *dptr & 0x80 )
- j |= _DP; // set decimal point
- *dptr++ = j;
- }
-
- for( i = 8; i; i-- ){ // for all segments
- dptr = displaymem;
- byte = 0;
- for( j = 8; j; j-- ){ // collect all digits
- if( *dptr & 1 )
- byte |= LPM(digits+j-1); // digit order mask
- *dptr >>= 1; // next segment
- dptr++;
- }
- display_write( byte + i * 256); // output same segments
- }
-}
-
-
-void display_clear( void )
-{
- u8 i;
-
- for( i = 8; i; i--)
- displaymem[i-1] = CHAR_SPACE;
-}
-
-
-void display_init( void )
-{
- display_write( 0xF00 ); // Testmode off
- display_write( 0x900 ); // Decode off
- display_write( 0xB07 ); // 8 Digits
- display_write( 0xC01 ); // Display on
- display_write( 0xA00 | brightness ); // Brightness
-}
-
-
-void display_off( void )
-{
- display_write( 0xC00 );
-}
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