terom@57: #define LED7_DDR    DDRB
terom@57: #define LED7_PORT   PORTB
terom@57: #define LED7_OE     PORTB1
terom@57: 
terom@57: // common anode?
terom@57: #define LED7_ANODE  0
terom@57: 
terom@57: #define LED7_OFFSET 0
terom@57: #define LED7_COUNT  2
terom@57: 
terom@57: static const uint8_t LED7SEG_FONT[] = {
terom@57:     0b00111111,	// 0
terom@57:     0b00000110,	// 1
terom@57:     0b01011011,	// 2
terom@57:     0b01001111,	// 3
terom@57:     0b01100110,	// 4
terom@57:     0b01101101,	// 5
terom@57:     0b01111101,	// 6
terom@57:     0b00000111,	// 7
terom@57:     0b01111111,	// 8
terom@57:     0b01100111,	// 9
terom@57:     0b01110111,	// A
terom@57:     0b01111100,	// B
terom@57:     0b00111001,	// C
terom@57:     0b01011110,	// D
terom@57:     0b01111001,	// E
terom@57:     0b01110001,	// F
terom@57: };
terom@57: 
terom@57: enum {
terom@57:     LED7SEG_DOT     = 0b10000000,
terom@57: };
terom@57: 
terom@57: void led7_init (void)
terom@57: {
terom@57:     sbi(&LED7_PORT, LED7_OE); // disabled (low)
terom@57:     sbi(&LED7_DDR, LED7_OE); // out
terom@57: }
terom@57: 
terom@57: /*
terom@57:  * Update external IO.
terom@57:  */
terom@57: void led7_update_raw (uint8_t *led7, char count)
terom@57: {
terom@57:     int i;
terom@57: 
terom@57:     for (i = 0; i < count; i++) {
terom@57:         char raw = LED7SEG_FONT[led7[i]];
terom@57: 
terom@57:         spi_tx[LED7_OFFSET + i] = LED7_ANODE ? ~raw  : raw;
terom@57:     } 
terom@57: }
terom@57: 
terom@57: void led7_update_hex (unsigned char c)
terom@57: {
terom@57:     uint8_t led7[2];
terom@57: 
terom@57:     led7[0] = c >> 4;
terom@57:     led7[1] = c & 0xF;
terom@57:     
terom@57:     return led7_update_raw(led7, sizeof(led7));
terom@57: }
terom@57: 
terom@57: void led7_update (char state)
terom@57: {
terom@57:     static unsigned char i = 0;
terom@57:     
terom@57:     if (i) {
terom@57:         // enable display
terom@57:         cbi(&LED7_PORT, LED7_OE);
terom@57:     }
terom@57:     
terom@57:     led7_update_hex(state);
terom@57:  
terom@57:     i++;
terom@57: }