VFD驱动程序源代码(芯片uPD16311)

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VFD驱动程序源代码(芯片uPD16311)
/**************************************************************************
* uPD16311 drving routines, VER 1.0
*
* COPYRIGHT (C) 2000, Enbia Technology Inc.
* Target: 8031
* AUTHOR: STEVEN LUO
*
* Revision History:
* 2001/1/5 - Original Version
*
**************************************************************************/
#include <reg51.h>
#include <intrins.h>
#include <types.h>
#include "16311_int.h"
//--------------------------------------------------------------------------
// Name: Write_16311_PWM(BYTE pwm)
// Return value: none
//--------------------------------------------------------------------------
void Write_16311_PWM(BYTE pwm){
m_PWM = pwm & 0x07 | 0x80;
}
//--------------------------------------------------------------------------
// Name: void TurnOn_1631
// Return value: none
//--------------------------------------------------------------------------
void TurnOn_16311(BOOL binp){
bOnoff = binp;
}
//--------------------------------------------------------------------------
// Name: Write_16311_RAM
// Return value: none
//--------------------------------------------------------------------------
void Write_16311_RAM(BYTE addr, BYTE idata *buf, BYTE size){
BYTE j;
// set display mode --------------------------//
PIN_16311_STB=0;
Write_16311_Byte(DISPLAY_MODE);
PIN_16311_STB=1;
_nop_(); _nop_(); _nop_(); _nop_();
// set data cmd----------------------//
PIN_16311_STB=0;
Write_16311_Byte(WRITE_BUF_INC); // Write display buffer command
PIN_16311_STB=1;
_nop_(); _nop_(); _nop_(); _nop_();
// set data addr----------------------//
PIN_16311_STB=0;
Write_16311_Byte(0xc0 | addr); // Write address command, start from addr 0
// write data successive----------------------//
for (j = 0; j < size; j++){
Write_16311_Byte(*buf); // Write 1st byte
buf ++;
} // let the IR detect
PIN_16311_STB=1;
_nop_(); _nop_(); _nop_(); _nop_();
// write display control----------------------//
PIN_16311_STB=0;
if (bOnoff)
Write_16311_Byte(VFD_ON | m_PWM); //Set pulse width and turn on display
else
Write_16311_Byte(VFD_OFF | m_PWM);
PIN_16311_STB=1;
_nop_(); _nop_(); _nop_(); _nop_();
}
//--------------------------------------------------------------------------
// Name: Read_16311_Key
// Description: This function Read 6 key status byte from 16311
// Arguments: none
// Return value: -1, no key, else: key value
//--------------------------------------------------------------------------
char Read_16311_Key(void){
register BYTE i;
char temp;
PIN_16311_STB=0;
Write_16311_Byte(READ_KEY); // Reads KEY data command
_nop_(); _nop_(); _nop_(); _nop_();
for (i=0; i<6; i++){
temp = Read_16311_Byte();
if (temp != -1) {temp += i*8; break;}
}
PIN_16311_STB=1;
return temp;
}
//--------------------------------------------------------------------------
// Name: Write_16311_Byte
// Description: This function Write 1 byte to 16311
// Arguments:
// Return value: the Switch status byte
//--------------------------------------------------------------------------
void Write_16311_Byte(BYTE mybyte){
register BYTE i;
for (i=8; i>0; --i){
PIN_16311_CLK=0;
_nop_(); _nop_(); _nop_(); _nop_();
if(mybyte&0x01)PIN_16311_DI=1; // LSB first
else PIN_16311_DI=0;
mybyte >>= 1; // Rotate Right
PIN_16311_CLK=1;
_nop_(); _nop_(); _nop_(); _nop_();
}
}
//--------------------------------------------------------------------------
// Name: Read_16311_Byte
// Description: This function Read 1 byte from 16311
// Arguments: none
// Return value: -1, no key, else the key value
//--------------------------------------------------------------------------
char Read_16311_Byte(void){
register BYTE i;
char keyvalue = -1;
PIN_16311_DO = 1; // set pin to input mode
for (i=0; i<8; i++){
PIN_16311_CLK=0;
_nop_(); _nop_(); _nop_(); _nop_();
if(PIN_16311_DO) {
keyvalue = i;
}
PIN_16311_CLK=1;
_nop_(); _nop_(); _nop_(); _nop_();
}
return keyvalue;
}

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