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[/] [openmsp430/] [trunk/] [fpga/] [xilinx_diligent_s3board/] [software/] [leds/] [7seg.h] - Rev 222
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/* ********************************************************************************************************* * * Multiplexed LED Display Driver * Reference: Jean J. Labrosse, Embedded Systems Building Blocks * * Filename : LED.C * Programmer : John Leung (www.TechToys.com.hk) * Remarks : Modified for PIC16-LEDSTK1 * Date : First version 1.0 on 19th Nov 2004 * Language : CCS C complier for PIC mid-range MCU, PCM version 3.170, under MPLAB IDE 7.01 * Hardware : PCB 11OCT2004.001, MCU is Microchip's PIC16F877a * History : Modified for PIC16-LEDSTK1 dated 12 Jan 2006 ********************************************************************************************************* * DESCRIPTION * * This module provides an interface to a multiplexed "7-segments x N digits" LED matrix. * * To use this driver: * * 1) To use this module, the following parameters under define (LED.H): * * DISP_N_DIG The total number of segments to display, inc. dp status * DISP_N_SS The total number of seven-segment digits, e.g "0" "1" "2" is 3-digit * DISP_PORT1_DIG The address of the DIGITS output port * DISP_PORT_SEG The address of the SEGMENTS output port * first_dig_msk The first digit mask for selecting the most significant digit * * 2) Allocate a hardware timer which will interrupt the CPU at a rate of at least: * * DISP_N_DIG * 60 (Hz) * ********************************************************************************************************* */ #ifndef _7SEG_H #define _7SEG_H /* ********************************************************************************************************* * CONSTANTS ********************************************************************************************************* */ #include "omsp_system.h" typedef unsigned char INT8U; typedef unsigned int INT16U; // Four-Digit, Seven-Segment LED Display driver #define DIGIT0 (*(volatile unsigned char *) 0x0090) #define DIGIT1 (*(volatile unsigned char *) 0x0091) #define DIGIT2 (*(volatile unsigned char *) 0x0092) #define DIGIT3 (*(volatile unsigned char *) 0x0093) #define DIGIT_NR 4 /* Total number of seven-segment digits */ /* ********************************************************************************************************* * FUNCTION PROTOTYPES ********************************************************************************************************* */ void DispStr(INT8U offset, INT8U *s); //API to display an ASCII string #endif // _7SEG_H
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