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NickGama
Joined: 23 Mar 2019
Posts: 3
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| Newhaven Display NHD-C0220BiZ-FSW-FBW-3V3M and PIC24, CCS |
 Posted: Sat Apr 06, 2019 4:42 am |
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Help
Using NHD-C0220BIZ-FSW-FBW-3V3M in my project.
Using PIC24FJ128GC010-I/PT using I2c bus to drive the display.
Using CCS Compiler.
I managed to get one line on display, but do not know how to get to second line.
If I use longer text, it does not roll over to second line.
My code is as below: Can you please advise ?
| Code: |
// ************** NHD-C0220BIZ-FSW-FBW-3V3M Display ***********************
void Display_Text()
{
unsigned char mytxt[] = {" Aerosino IXDC-GF R4"};
DSP_LED_on();
output_low(LCD_RST);
delay_us(300);
output_high(LCD_RST);
delay_ms(1000);
Init_LCD();
int i = 0;
I2C_start();
delay_us(30);
I2C_write(SLAVE_WRITE); // slave address
delay_us(30);
I2C_write(0x40); // data send
delay_us(30);
do
{
I2C_write(mytxt[i]);
delay_us(30);
i++;
} while (mytxt[i] != '\0');
delay_ms(5000);
}
//****************** FUNCTIONS ****************************
void DSP_LED_off(void)
{
output_low(LCD_BL);
}
// LED on - turn on the LED
void DSP_LED_on(void)
{
output_high(LCD_BL);
}
void init_LCD(void)
{
I2C_start();
delay_us(30);
I2C_write(SLAVE_WRITE); // slave
delay_us(30);
I2C_write(0); // Command send
delay_us(30);
I2C_write(0x38); // Set table 0
delay_us(30);
I2C_write(0x39); // Set table 1
delay_us(30);
I2C_write(0x14); // Set bias - 1/5
delay_us(30);
I2C_write(0x74); // Set contrast C3 on
delay_us(30);
I2C_write(0x5E); // Icon on, Booster on, C5 on
delay_us(30);
I2C_write(0x6D); // follower on, follower amp ratio 5
delay_us(30);
I2C_write(0x0C); // display on
delay_us(30);
I2C_write(0x01); // clear display
delay_us(30);
I2C_write(0x06); // entry mode set to increment
delay_us(30);
I2C_stop();
}
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NickGama |
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temtronic
Joined: 01 Jul 2010
Posts: 9229
Location: Greensville,Ontario
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| Posted: Sat Apr 06, 2019 5:05 am |
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OK, I haven't used that LCD before but general comments.
1) Be sure the hardware is correct ! Have you the proper I2C pullup resistors? Do you have the correct caps on the display? I found a datasheet and it needs 4 or 5 parts for it to work.
2)Run PCM P's 'I2C Scanner' program from the code library. It will confirm the device's base address and that it's communicating.
3) that LCD is 2 by 20, where line 1, pos 1 is 0x00, line 2, pos 1 is 0x40. So you'll have to send 64 characters before you see any on the second line.
4) have a look at the datasheet as they show basic code (driver) to use the display. You'll have to translate into CCS C but it should work.
5) Search this forum for possible code, then use google. Be aware though that Arduino programs use 7 bit I2C addressing, CCS 8 bit. |
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NickGama
Joined: 23 Mar 2019
Posts: 3
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| Newhaven Display NHD-C0220BiZ-FSW-FBW-3V3M and PIC24, CCS |
| Posted: Sat Apr 06, 2019 5:29 am |
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Temtronic, Many thanks, I sent 64 characters and second line became alive.
This saved me lot of time.......
| temtronic wrote: | OK, I haven't used that LCD before but general comments.
1) Be sure the hardware is correct ! Have you the proper I2C pullup resistors? Do you have the correct caps on the display? I found a datasheet and it needs 4 or 5 parts for it to work.
2)Run PCM P's 'I2C Scanner' program from the code librry. It will confirm the device's base address and that it's communicating.
3) that LCD is 2 by 20, where line 1,pos 1 is 0x00, line 2,pos 1 is 0x40. So you'll have to send 64 characters before you see any on the second line.
4) have a look at the datasheet as they show basic code( driver) to use the display. you'll have to translate into CCS C but it should work.
5) search this forum for possible code, then use google. Be aware though that Ardunio programs use 7 bit I2C addressing, CCS 8 bit. |
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