1 Experiment purpose: Understand how to use LCD/LED TM1638
2 Experiment content: 1 Display 01234567 on LCD or LED
2 Design electronic clock (starting time 23:59:45)
3 Combined with Experiment 3, use a timer to control the operation of the clock
Three experimental circuit diagram:
?4 Experimental ideas and procedures:
1.Display 01234567 on LCD
#include <msp430f6638.h>
/* Private typedef ----------------------------------------------- -------------*/
/* Private define -------------------------------------------------- ---------------*/
#define CPU_F ((double)1000000)
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
// LCD segment definitions.
#define d 0x01
#define c 0x20
#define b 0x40
#define a 0x80
#define dp 0x10
#define g 0x04
#define f 0x08
#define e 0x02
/* Private macro ----------------------------------------------- ---------------*/
/* Private variables -------------------------------------------------- -----------*/
const char char_gen[] = { // As used in 430 Day Watch Demo board
a + b + c + d + e + f, // Displays "0"
b + c, // Displays "1"
a + b + d + e + g, // Displays "2"
a + b + c + d + g, // Displays "3"
b + c + f + g, // Displays "4"
a + c + d + f + g, // Displays "5"
a + c + d + e + f + g, // Displays "6"
a + b + c, // Displays "7"
a + b + c + d + e + f + g, // Displays "8"
a + b + c + d + f + g, // Displays "9"
a + b + c + e + f + g, // Displays "A"
c + d + e + f + g, // Displays "b"
a + d + e + f, // Displays "c"
b + c + d + e + g, // Displays "d"
a + d + e + f + g, // Displays "E"
a + e + f + g, // Displays "f"
a + b + c + d + f + g, // Displays "g"
c + e + f + g, // Displays "h"
b + c, // Displays "i"
b + c + d, // Displays "j"
b + c + e + f + g, // Displays "k"
d + e + f, // Displays "L"
a + b + c + e + f, // Displays "n"
a + b + c + d + e + f + g + dp // Displays "full"
};
/* Private function prototypes ------------------------------------------------ --*/
void Init_lcd(void); // LCD initialization
void LcdGo(unsigned char Dot); //Turn on or off the LCD
void LcdBlink(unsigned char doit); // Display or hide the display content
void LCD_Clear(void); // Clear the screen
void Init_TS3A5017DR(void); // Configure TS3A5017DR IN1 and IN2
void Backlight_Enable(void); // Turn on the backlight
/* Private functions -------------------------------------------------- -----------*/
/*!
*Function: configure LCD segment output function
*Input parameters: none
*Return value: None
*/
void Init_lcd(void)
{
LCDBCTL0 =LCDDIV0 + LCDPRE0 + LCDMX1 + LCDSSEL + LCDMX1 + LCD4MUX ;
LCDBPCTL0 = LCDS0 + LCDS1 + LCDS2 + LCDS3 + LCDS4 + LCDS5 + LCDS6 +
LCDS7 + LCDS8
+ LCDS9 + LCDS10 + LCDS11 ;
P5SEL = 0xfc;
}
/****************************************************** ****************************
Turn LCD on or off
1: open 0: closed
*************************************************** ***************************/
/*!
*Function: turn on or off the LCD
*Input parameters: Dot
* When Dot is 1: Turn on the LCD display
* When Dot is 0: turn off the LCD display
*Return value: None
*/
void LcdGo(unsigned char Dot)
{
if(Dot==1)
{
//Open LCD display
LCDBCTL0 |= LCDON;
}
else if(Dot==0)
{
//Close LCD display
LCDBCTL0 &= ~LCDON;
}
}
/*!
*Function: display or hide display content
*Input parameters: none
*Return value: None
*/
void LcdBlink(unsigned char doit)
{
if(doit==0)
{
LCDBCTL0 &= ~LCDSON;
}
else if(doit==1)
{
LCDBCTL0 |= LCDSON;
}
}
/*!
*Function: Clear the LCD display content
*Input parameters: none
*Return value: None
*/
void LCD_Clear(void)//clear screen
{
unsigned char index;
for (index=0; index<12; index + + )
{
LCDMEM[index] = 0;
}
}
/*!
*Function: configure TS3A5017DR channel
*Input parameters: none
*Return value: None
*/
void Init_TS3A5017DR(void)
{
// Configure TS3A5017DR IN1 and IN2
P1DIR |= BIT6 + BIT7; //P3.4 : IN1 ; P3.5 : IN2 set as output
P1OUT & amp;= ~BIT7; //IN1 = 0
P1OUT |= BIT6; //IN2 = 1
}
/*!
*Function: LCD segment backlight enable
*Input parameters: none
*Return value: None
*/
void Backlight_Enable(void)
{
P8DIR |= BIT0;
P8OUT |= BIT0;
}
/*!
*Function function: main function
*Input parameters: none
*Return value: None
*/
int main()
{
int i,j;
WDTCTL = WDTPW + WDTHOLD;//Stop WDT
Init_TS3A5017DR(); // Configure TS3A5017DR IN1 and IN2
Init_lcd(); // LCD initialization
Backlight_Enable(); // Turn on backlight
LcdGo(1); //Open the LCD module
LCD_Clear(); // Clear screen
while(1)
{
for (i=0;i<8;i + + ) // Display "01234567"
{
for(j=0;j<8;j + + )
{
LCDMEM[j] = char_gen[i];
}
delay_ms(1000);
}
}
}
2. Design an electronic clock (display starting time 23:59:45)
#include <msp430f6638.h>
/* Private typedef ----------------------------------------------- -------------*/
/* Private define -------------------------------------------------- ---------------*/
#define CPU_F ((double)1000000)
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
// LCD segment definitions.
#define d 0x01
#define c 0x20
#define b 0x40
#define a 0x80
#define dp 0x10
#define g 0x04
#define f 0x08
#define e 0x02
/* Private macro ----------------------------------------------- ---------------*/
/* Private variables -------------------------------------------------- -----------*/
const char char_gen[] = { // As used in 430 Day Watch Demo board
a + b + c + d + e + f, // Displays "0"
b + c, // Displays "1"
a + b + d + e + g, // Displays "2"
a + b + c + d + g, // Displays "3"
b + c + f + g, // Displays "4"
a + c + d + f + g, // Displays "5"
a + c + d + e + f + g, // Displays "6"
a + b + c, // Displays "7"
a + b + c + d + e + f + g, // Displays "8"
a + b + c + d + f + g, // Displays "9"
a + b + c + e + f + g, // Displays "A"
c + d + e + f + g, // Displays "b"
a + d + e + f, // Displays "c"
b + c + d + e + g, // Displays "d"
a + d + e + f + g, // Displays "E"
a + e + f + g, // Displays "f"
a + b + c + d + f + g, // Displays "g"
c + e + f + g, // Displays "h"
b + c, // Displays "i"
b + c + d, // Displays "j"
b + c + e + f + g, // Displays "k"
d + e + f, // Displays "L"
a + b + c + e + f, // Displays "n"
a + b + c + d + e + f + g + dp // Displays "full"
};
/* Private function prototypes ------------------------------------------------ --*/
void Init_lcd(void); // LCD initialization
void LcdGo(unsigned char Dot); //Turn on or off the LCD
void LcdBlink(unsigned char doit); // Display or hide the display content
void LCD_Clear(void); // Clear the screen
void Init_TS3A5017DR(void); // Configure TS3A5017DR IN1 and IN2
void Backlight_Enable(void); // Turn on the backlight
/* Private functions -------------------------------------------------- -----------*/
/*!
*Function: configure LCD segment output function
*Input parameters: none
*Return value: None
*/
void Init_lcd(void)
{
LCDBCTL0 =LCDDIV0 + LCDPRE0 + LCDMX1 + LCDSSEL + LCDMX1 + LCD4MUX ;
LCDBPCTL0 = LCDS0 + LCDS1 + LCDS2 + LCDS3 + LCDS4 + LCDS5 + LCDS6 +
LCDS7 + LCDS8
+ LCDS9 + LCDS10 + LCDS11 ;
P5SEL = 0xfc;
}
/****************************************************** ****************************
Turn LCD on or off
1: open 0: closed
*************************************************** ***************************/
/*!
*Function: turn on or off the LCD
*Input parameters: Dot
* When Dot is 1: Turn on the LCD display
* When Dot is 0: turn off the LCD display
*Return value: None
*/
void LcdGo(unsigned char Dot)
{
if(Dot==1)
{
//Open LCD display
LCDBCTL0 |= LCDON;
}
else if(Dot==0)
{
//Close LCD display
LCDBCTL0 &= ~LCDON;
}
}
/*!
*Function: display or hide display content
*Input parameters: none
*Return value: None
*/
void LcdBlink(unsigned char doit)
{
if(doit==0)
{
LCDBCTL0 &= ~LCDSON;
}
else if(doit==1)
{
LCDBCTL0 |= LCDSON;
}
}
/*!
*Function: Clear the LCD display content
*Input parameters: none
*Return value: None
*/
void LCD_Clear(void)//clear screen
{
unsigned char index;
for (index=0; index<12; index + + )
{
LCDMEM[index] = 0;
}
}
/*!
*Function: configure TS3A5017DR channel
*Input parameters: none
*Return value: None
*/
void Init_TS3A5017DR(void)
{
// Configure TS3A5017DR IN1 and IN2
P1DIR |= BIT6 + BIT7; //P3.4 : IN1 ; P3.5 : IN2 set as output
P1OUT & amp;= ~BIT7; //IN1 = 0
P1OUT |= BIT6; //IN2 = 1
}
/*!
*Function: LCD segment backlight enable
*Input parameters: none
*Return value: None
*/
void Backlight_Enable(void)
{
P8DIR |= BIT0;
P8OUT |= BIT0;
}
/*!
*Function function: main function
*Input parameters: none
*Return value: None
*/
int main()
{
WDTCTL = WDTPW + WDTHOLD;//Stop WDT
Init_TS3A5017DR(); // Configure TS3A5017DR IN1 and IN2
Init_lcd(); // LCD initialization
Backlight_Enable(); // Turn on backlight
LcdGo(1); //Open the LCD module
LCD_Clear(); // Clear screen
while(1)
{
// for (i=0; i<6; i + + ) // Display "012345"
// {
// for(j=0;j<6;j + + )
// {
// LCDMEM[j] = char_gen[i];
// }
// delay_ms(1000);
// }
LCDMEM[0] = char_gen[2];//The first number displays 2’
LCDMEM[1] = char_gen[3];//The first number displays 3’
LCDMEM[2] = char_gen[5];//The first number displays 5’
LCDMEM[3] = char_gen[9];//The first number displays 9’
LCDMEM[4] = char_gen[4];//The first number displays 4’
LCDMEM[5] = char_gen[5];//The first number displays 5’
}
}
3. Use timer interrupt for timing and modify hours, minutes and seconds. data
#include <msp430f6638.h>
/* Private typedef ----------------------------------------------- -------------*/
/* Private define -------------------------------------------------- ---------------*/
#define CPU_F ((double)1000000)
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
// LCD segment definitions.
#define d 0x01
#define c 0x20
#define b 0x40
#define a 0x80
#define dp 0x10
#define g 0x04
#define f 0x08
#define e 0x02
/* Private macro ----------------------------------------------- ---------------*/
/* Private variables -------------------------------------------------- -----------*/
const char char_gen[] = { // As used in 430 Day Watch Demo board
a + b + c + d + e + f, // Displays "0"
b + c, // Displays "1"
a + b + d + e + g, // Displays "2"
a + b + c + d + g, // Displays "3"
b + c + f + g, // Displays "4"
a + c + d + f + g, // Displays "5"
a + c + d + e + f + g, // Displays "6"
a + b + c, // Displays "7"
a + b + c + d + e + f + g, // Displays "8"
a + b + c + d + f + g, // Displays "9"
a + b + c + e + f + g, // Displays "A"
c + d + e + f + g, // Displays "b"
a + d + e + f, // Displays "c"
b + c + d + e + g, // Displays "d"
a + d + e + f + g, // Displays "E"
a + e + f + g, // Displays "f"
a + b + c + d + f + g, // Displays "g"
c + e + f + g, // Displays "h"
b + c, // Displays "i"
b + c + d, // Displays "j"
b + c + e + f + g, // Displays "k"
d + e + f, // Displays "L"
a + b + c + e + f, // Displays "n"
a + b + c + d + e + f + g + dp // Displays "full"
};
/* Private function prototypes ------------------------------------------------ --*/
void Init_lcd(void); // LCD initialization
void LcdGo(unsigned char Dot); //Turn on or off the LCD
void LcdBlink(unsigned char doit); // Display or hide the display content
void LCD_Clear(void); // Clear the screen
void Init_TS3A5017DR(void); // Configure TS3A5017DR IN1 and IN2
void Backlight_Enable(void); // Turn on the backlight
/* Private functions -------------------------------------------------- -----------*/
/*!
*Function: configure LCD segment output function
*Input parameters: none
*Return value: None
*/
void Init_lcd(void)
{
LCDBCTL0 =LCDDIV0 + LCDPRE0 + LCDMX1 + LCDSSEL + LCDMX1 + LCD4MUX ;
LCDBPCTL0 = LCDS0 + LCDS1 + LCDS2 + LCDS3 + LCDS4 + LCDS5 + LCDS6 +
LCDS7 + LCDS8
+ LCDS9 + LCDS10 + LCDS11 ;
P5SEL = 0xfc;
}
/****************************************************** ****************************
Turn LCD on or off
1: open 0: closed
*************************************************** ***************************/
/*!
*Function: turn on or off the LCD
*Input parameters: Dot
* When Dot is 1: Turn on the LCD display
* When Dot is 0: turn off the LCD display
*Return value: None
*/
void LcdGo(unsigned char Dot)
{
if(Dot==1)
{
//Open LCD display
LCDBCTL0 |= LCDON;
}
else if(Dot==0)
{
//Close LCD display
LCDBCTL0 &= ~LCDON;
}
}
/*!
*Function: display or hide display content
*Input parameters: none
*Return value: None
*/
void LcdBlink(unsigned char doit)
{
if(doit==0)
{
LCDBCTL0 &= ~LCDSON;
}
else if(doit==1)
{
LCDBCTL0 |= LCDSON;
}
}
/*!
*Function: Clear the LCD display content
*Input parameters: none
*Return value: None
*/
void LCD_Clear(void)//clear screen
{
unsigned char index;
for (index=0; index<12; index + + )
{
LCDMEM[index] = 0;
}
}
/*!
*Function: configure TS3A5017DR channel
*Input parameters: none
*Return value: None
*/
void Init_TS3A5017DR(void)
{
// Configure TS3A5017DR IN1 and IN2
P1DIR |= BIT6 + BIT7; //P3.4 : IN1 ; P3.5 : IN2 set as output
P1OUT & amp;= ~BIT7; //IN1 = 0
P1OUT |= BIT6; //IN2 = 1
}
/*!
*Function: LCD segment backlight enable
*Input parameters: none
*Return value: None
*/
void Backlight_Enable(void)
{
P8DIR |= BIT0;
P8OUT |= BIT0;
}
/*!
*Function: main function
*Input parameters: none
*Return value: None
*/
int main()
{
WDTCTL = WDTPW + WDTHOLD;//Stop WDT
Init_TS3A5017DR(); // Configure TS3A5017DR IN1 and IN2
Init_lcd(); // LCD initialization
Backlight_Enable(); // Turn on backlight
LcdGo(1); //Open the LCD module
LCD_Clear(); // Clear screen
LCDMEM[0] = char_gen[2];//The first number displays 2’
LCDMEM[1] = char_gen[3];//The first number displays 3’
LCDMEM[2] = char_gen[5];//The first number displays 5’
LCDMEM[3] = char_gen[9];//The first number displays 9’
LCDMEM[4] = char_gen[4];//The first number displays 4’
LCDMEM[5] = char_gen[5];//The first number displays 5’
while(1)
{
int i,j;
for(j=0;j<4;j + + )
{
LCDMEM[5] = char_gen[j + 5];
delay_ms(1000);
}
LCDMEM[4] = char_gen[5];
LCDMEM[5] = char_gen[0];
for(j=0;j<10;j + + )
{
LCDMEM[5] = char_gen[j];
delay_ms(1000);
}
LCDMEM[0] = char_gen[0];
LCDMEM[1] = char_gen[0];
LCDMEM[2] = char_gen[0];
LCDMEM[3] = char_gen[0];
LCDMEM[4] = char_gen[0];
LCDMEM[5] = char_gen[0];
delay_ms(1000); //It acts as a delay and will not jump or display directly.
for (i=0; i<6; i + + )
{
sec++;
if(sec==60){
sec=0;
mun++;
}
if(mun==60){
mun=0;
hou + + ;
}
if(hou==24){
hou=0;
}
LCDMEM[5] = char_gen[sec];
LCDMEM[4] = char_gen[sec/10];
LCDMEM[3] = char_gen[mun];
LCDMEM[2] = char_gen[mun/10];
LCDMEM[1] = char_gen[hou];
LCDMEM[0] = char_gen[hou/10];
// LCDMEM[j] = char_gen[j];//Modify this place, hou,mun,sec
delay_ms(1000);
}
}