lcd_x_nios.c

UCGUI在NIOS2的移植

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              礐/GUI is protected by international copyright laws. Knowledge of the
*              source code may not be used to write a similar product. This file may
*              only be used in accordance with a license and should not be redistributed
*              in any way. We appreciate your understanding and fairness.
*
----------------------------------------------------------------------
File        : LCD_X_Nios.c
Purpose     : Port routines
Author		: Modified By Jim Yang (based on demo version)
----------------------------------------------------------------------
*/

#include "system.h"
#include "altera_avalon_pio_regs.h"
#include <stdio.h>
#include <unistd.h>

void LCD_X_Init(void);
unsigned char LCD_X_Read00(void);
unsigned char LCD_X_Read01(void);
void LCD_X_Write00(unsigned char c);
void LCD_X_Write01(unsigned char c);


/*********************************************************************
*
*           Initialisation
*
**********************************************************************
  This routine should be called from your application program
  to set port pins to their initial values
*/

void LCD_X_Init(void) {
int i;
//system reset
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_RST_BASE, 0);  //set RST=0
  i = 0;
    while (i<10000)   i++;
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_RST_BASE, 1);  //set RST=0
    IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 0);  //set CS=0
    
}

/*********************************************************************
*
*           Access routines, controller 0
*
**********************************************************************
  Usually, there is no need to modify these routines.
  It should be sufficient ot modify the low-level macros
  above.
*/

/* Read from controller 0, with A0 = 0, CS0 = 0 */
unsigned char LCD_X_Read00(void) {
unsigned  char c;
//  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 0);  //set CS=0
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_A_BASE, 0);  //set A=0
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_RD_BASE, 0);  //set RD=0  
  IOWR_ALTERA_AVALON_PIO_DIRECTION(SED1335_DATA_BASE, 0); //set dir as input
   c = IORD_ALTERA_AVALON_PIO_DATA(SED1335_DATA_BASE); //read data
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_RD_BASE, 1);  //set RD=1
//    IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 1);  //set CS=1
  return c;
}

/* Read from controller 0, with A0 = 1, CS0 = 0 */
unsigned char LCD_X_Read01(void) {
  char c;
//  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 0);  //set CS=0
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_A_BASE, 1);  //set A=1
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_RD_BASE, 0);  //set RD=0  
  IOWR_ALTERA_AVALON_PIO_DIRECTION(SED1335_DATA_BASE, 0); //set dir as input
  c = IORD_ALTERA_AVALON_PIO_DATA(SED1335_DATA_BASE); //read data
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_RD_BASE, 1);  //set RD=1
//  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 1);  //set CS=1
  return c;
}

/* Write to controller 0, with A0 = 0, CS0 = 0 */
void LCD_X_Write00(unsigned char c) {
//  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 0);  //set CS=0
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_A_BASE, 0);  //set A=0
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_WR_BASE, 0);  //set WR=0  
  IOWR_ALTERA_AVALON_PIO_DIRECTION(SED1335_DATA_BASE, 0xff); //set dir as output
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_DATA_BASE, c); //write data
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_WR_BASE, 1);  //set WR=1
//  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 1);  //set CS=1
}


/* Write to controller 0, with A0 = 1, CS0 = 0 */
void LCD_X_Write01(unsigned char c) {
//  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 0);  //set CS=0
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_A_BASE, 1);  //set A=1
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_WR_BASE, 0);  //set WR=0  
  IOWR_ALTERA_AVALON_PIO_DIRECTION(SED1335_DATA_BASE, 0xff); //set dir as output
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_DATA_BASE, c); //write data
  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_WR_BASE, 1);  //set WR=1
//  IOWR_ALTERA_AVALON_PIO_DATA(SED1335_CS_BASE, 1);  //set CS=1
}