LPC2103 learning board - digital tube display-EEWORLD

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Schematic diagram of the digital tube circuit:

LPC2103 Learning Board - Digital Tube Display - Xiaowen - Xiaowen Electronic Design

TRS and TMS use the JTAG port, so the normal IO function cannot be used during debugging. It is necessary to cancel the JTAG mode after the program is burned into the system to work normally.

Source program:
/**************ARM7(LPC2103) exercise program**************************/
/****************************************************************/
/*****File Function: Digital tube display *****/
/*****Program Author : ClimberWin *****/
/*****MCU: LPC2103F external 12M crystal *****/
/*****Compile Date : 2010/04/01 *****/
/*****Edition Info : V1.0 *****/
/*****************************************************************/
//Compile environment KEIL for ARM
//Data interface P0.10-P0.17
//Select end P0.25 P0.26 P0.27 P0.28
//Buzzer P0.21
//Note: The digital tube uses the JTAG pin, so JTAG needs to be disabled during operation to do normal IO processing. Otherwise, only two digital tubes can be selected.
#include
#include
#define uint unsigned int
#define uchar unsigned char

//#define speak (1<<21) //Buzzer pin definition
#define COM1 (1<<25) //Define the enable pin of digital tube 1
#define COM2 (1<<26) //Define the enable pin of digital tube 2
#define COM3 (1<<27) //Define the enable pin of digital tube 3
#define COM4 (1<<28) //Define the enable pin of digital tube 4

void delayms(unsigned int count);//delay program
void led_display(void);//display program

uchar LED_DATA[16]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E};

/******************Delay program******************/
void delayms(unsigned int count)
{
unsigned int i,j;
for(i =0;i for(j=0;j<1000;j++);
}

void led_display(void)
{
float led_data;
   IO0CLR=0xffffffff;
       led_data=LED_DATA[4]<<10;
    IO0SET=led_data;
    IO0CLR=COM1;
    IO0SET=COM2;
    IO0SET=COM3;
    IO0SET=COM4;
   delayms(50);

   IO0CLR=0xffffffff;
      led_data=LED_DATA[3]<<10;
    IO0SET=led_data;
    IO0CLR=COM2;
    IO0SET=COM1;
    IO0SET=COM3;
    IO0SET=COM4;
   delayms(50);

IO0CLR=0xffffffff;
     led_data=LED_DATA[2]<<10;
    IO0SET=led_data;
    IO0CLR=COM3;
    IO0SET=COM2;
    IO0SET=COM1;
    IO0SET=COM4;
   delayms(50);

IO0CLR=0xffffffff;
     led_data=LED_DATA[1]<<10;
    IO0SET=led_data;
    IO0CLR=COM4;
    IO0SET=COM1;
    IO0SET=COM2;
    IO0SET=COM3;
   delayms(50);
}

//////////////Main program////////////////////
void main(void)
{

PINSEL0 |= 0x00000000;
PINSEL1 |= 0x00000000;

IO0DIR=0x1e03fc00; //Configure P0.10-P0.17 P0.25 P0.26 P0.27 P0.28 as output
while(1)
{
led_display();
}
}

Keywords：LPC2103 Reference address：LPC2103 learning board - digital tube display

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