HT1621 Test Procedure

Functional description: HT1621 chip test program

Description: This test program can test every field of HT1621.

            Light up each field in turn

Parameters:
************************************************ ********/
#include
#include
#define uchar unsigned char
#define uint unsigned int

#define _Nop() _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_()
#define BIAS 0x52 //0b1000 0101 0010 1/3duty 4com

#define SYSDIS 0X00 //0b1000 0000 0000 Turn off the system oscillator and LCD bias generator
#define SYSEN 0X02 //0b1000 0000 0010 Turn on the system oscillator

#define LCDOFF 0X04 //0b1000 0000 0100 Turn off LCD bias
#define LCDON 0X06 //0b1000 0000 0110 Turn on LCD bias
#define XTAL 0x28 //0b1000 0010 1000 External clock
#define RC256 0X30 //0b1000 0011 0000 Internal clock
#define TONEON 0X12 //0b1000 0001 0010 Turn on sound output
#define TONEOFF 0X10 //0b1000 0001 0000 Turn off sound output
#define WDTDIS 0X0A //0b1000 0000 1010 Disable watchdog

//HT1621 control bit (LCD module interface definition, change according to your own needs)
sbit HT1621_DAT=P3^4; //HT1621 data pin
sbit HT1621_CS=P3^2; //HT1621 enable pin
sbit HT1621_WR=P3^3; //HT1621 clock pin uchar
code Ht1621Tab[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

                        0x00,0x00,0x00,0x00,0x00};

//delay us
void Delay(uchar us) //5,7,9
{
 while(--us);
}

//delay ms
void DelayMS(uint iMs)
{
 uint i,j;
 for(i=0;i  for(j=0;j<65;j++) Delay(1);
}

/**********************************************************
Write data function, cnt is the number of data bits to be transmitted, data is transmitted with the low bit first
*******************************************************/
void Ht1621Wr_Data (ucharData ,uchar cnt)
{
 uchar i;
 for (i=0;i       {
       HT1621_WR=0;
       _Nop();
       HT1621_DAT=Data &0x80;
       _Nop();
       HT1621_WR=1;
       _Nop();
      Data <<=1;
     }

}

/********************************************************
Function name: void Ht1621WrCmd (uchar Cmd)
Function description: HT1621 command write function
Global variables: None
Parameter description: Cmd is the write command data
Return description: None

Description: Write command flag 100
*****************************************************/
void Ht1621WrCmd(uchar Cmd)
{
 HT1621_CS=0;
 _Nop();
 Ht1621Wr_Data (0x80,4); //Write command flag 100
 Ht1621Wr_Data (Cmd,8); //Write command data
 HT1621_CS=1;
 _Nop();
}
/********************************************************
Function name: void Ht1621WrOneData(uchar Addr,uchar Data )
Function description: HT1621 writes data at the specified address
Global variables: None
Parameter description: Addr is the initial address to write, Data is the data to write
Return description:
None Note: Because the data bit of HT1621 is 4 bits, the actual written data is the last 4 bits of the parameter
**********************************************************/
void Ht1621WrOneData(uchar Addr,uchar Data)
{
 HT1621_CS=0;
 Ht1621Wr_Data (0xa0,3); //Write data flag 101
 Ht1621Wr_Data (Addr<<2,6); //Write address data
 Ht1621Wr_Data (Data <<4,4); //Write data
 HT1621_CS=1;
 _Nop();
}
/********************************************************
HT1621 test program, 2008-2-13, 22:41:43
Function name: void Ht1621WrAllData(uchar Addr,uchar *p,uchar cnt)
Function description: HT1621 continuous write function
Global variables: None
Parameter description: Addr is the initial write address, *p is the continuous write data pointer,
                  cnt is the total number of written data
Return description: None Description
: HT1621 has 4 data bits, here each data is 8 bits,
           the total number of written data is calculated as 8 bits
****************************************************/
void Ht1621WrAllData(uchar Addr,uchar *p,uchar cnt)
{
 uchar i;
 HT1621_CS=0;
 Ht1621Wr_Data (0xa0,3); //Write data flag 101
 Ht1621Wr_Data (Addr<<2,6); //Write address datafor
 (i=0;i       {
        Ht1621Wr_Data (*p,8); //Write data
        p++;
       }
 HT1621_CS=1;
 _Nop();
}
/********************************************************
Function name: void Ht1621_Init(void)
Function description: HT1621 initialization
Global variables: None
Parameter description: None
Return description: None
Version: 1.0Description
: After initialization, all fields of the LCD screen are displayed
********************************************************/
void Ht1621_Init(void)
{
 HT1621_CS=1;
 HT1621_WR=1;
 HT1621_DAT=1;
 DelayMS(2000); //Delay to stabilize the LCD working voltage
 Ht1621WrCmd(BIAS);
 Ht1621WrCmd(RC256); //Use the internal oscillator
 Ht1621WrCmd(SYSDIS);
 Ht1621WrCmd(WDTDIS);
 Ht1621WrCmd(SYSEN);
 Ht1621WrCmd(LCDON);
}

/**********************************/
void main()
{
 uchar i,j,t;
 Ht1621_Init(); //Power on and initialize LCD
 DelayMS(1000); //Delay for a whilewhile
 (1){
               Ht1621WrAllData(0,Ht1621Tab,16); //Clear 1621 register data, and clear the screenfor
               (i=0;i<32;i++)
                    {
                     t=0x01;
                     for (j=0;j<4;j++)
                          {
                           Ht1621WrOneData(i,t);
                           t<<=1;
                           t++;
                           P1_5=~P1_5;
                           DelayMS(5000);
                          }
                     }
               }
  }