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olivier.gi |
/*
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*********************************************************************************************************
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*
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* Multiplexed LED Display Driver
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* Reference: Jean J. Labrosse, Embedded Systems Building Blocks
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*
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* Filename : LED.C
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* Programmer : John Leung (www.TechToys.com.hk)
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* Remarks : Modified for PIC16-LEDSTK1
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* Date : First version 1.0 on 19th Nov 2004
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* Language : CCS C complier for PIC mid-range MCU, PCM version 3.170, under MPLAB IDE 7.01
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* Hardware : PCB 11OCT2004.001, MCU is Microchip's PIC16F877a
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* History : Modified for PIC16-LEDSTK1 dated 12 Jan 2006
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*********************************************************************************************************
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* DESCRIPTION
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*
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* This module provides an interface to a multiplexed "7-segments x N digits" LED matrix.
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*
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* To use this driver:
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*
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* 1) To use this module, the following parameters under define (LED.H):
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*
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* DISP_N_DIG The total number of segments to display, inc. dp status
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* DISP_N_SS The total number of seven-segment digits, e.g "0" "1" "2" is 3-digit
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* DISP_PORT1_DIG The address of the DIGITS output port
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* DISP_PORT_SEG The address of the SEGMENTS output port
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* first_dig_msk The first digit mask for selecting the most significant digit
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*
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* 2) Allocate a hardware timer which will interrupt the CPU at a rate of at least:
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*
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* DISP_N_DIG * 60 (Hz)
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*
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*********************************************************************************************************
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*/
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#ifndef _7SEG_H
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#define _7SEG_H
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/*
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*********************************************************************************************************
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* CONSTANTS
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*********************************************************************************************************
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*/
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#include <io.h>
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#include <signal.h>
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#include <iomacros.h>
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typedef unsigned char INT8U;
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typedef unsigned int INT16U;
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// Four-Digit, Seven-Segment LED Display driver
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#define DIGIT0_ 0x0090
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sfrb (DIGIT0,DIGIT0_);
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#define DIGIT1_ 0x0091
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sfrb (DIGIT1,DIGIT1_);
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#define DIGIT2_ 0x0092
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sfrb (DIGIT2,DIGIT2_);
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#define DIGIT3_ 0x0093
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sfrb (DIGIT3,DIGIT3_);
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#define DIGIT_NR 4 /* Total number of seven-segment digits */
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/*
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*********************************************************************************************************
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* FUNCTION PROTOTYPES
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*********************************************************************************************************
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*/
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void DispStr(INT8U offset, INT8U *s); //API to display an ASCII string
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#endif // _7SEG_H
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