LCD issue

[AtomSoft]

Ok im porting some ARM code from one ARM to another ....

The issue lies in the PINOUT. I have a 16bit value i need to place on 3 different ports. For example the INT 0x1234 needs to be split into 3 parts...

INT A = 1
INT B = 2 & 3
INT C = 4

To do this im am trying the below code"

void SetLcdInt(int data)
{
    int DAT_A = (data & 0x000F);
    int DAT_B = ((data>>4) & 0x00FF);
    int DAT_C = ((data>>12) & 0x000F);

    GPIOC->ODR &= ~(0x3C0);
    GPIOD->ODR &= ~(0xFF);
    GPIOE->ODR &= ~(0x0F);

    GPIOC->ODR |= (DAT_A<<6);
    GPIOD->ODR |= (DAT_B);
    GPIOE->ODR |= (DAT_C);
}

Ok GPIOC is the first PORT i need the data in... from bits 6:9
SO....

GPIOC [6:9] = BITS 0:3 of INT (since starts at bit 6 i shift it over after i get the bits)
GPIOD [0:7] = BITS 4:11 of INT
GPIOC [0:3] = BITS 12:15 of INT

Am i wrong? Its not working

 

[AtomSoft]

Never mind code is working but still no LCD LOL

 

[KeepItSimpleStupid]

Shouldn't this:

int DAT_A = (data & 0x000F);
int DAT_B = ((data>>4) & 0x00FF);
int DAT_C = ((data>>12) & 0x000F);


Be

int DAT_C = (data & 0x000F);
int DAT_B = ((data>>4) & 0x00FF);
int DAT_A = ((data>>12) & 0x000F);

Based on your example?

The ARM appears to be bi-endian, a term I hadn't heard before. It can be either big or little endian. Yipes!

 

[AtomSoft]

I can debug the MCU and it seems to be setting the correct bits the way i have it. The only issue is the LCD isnt really responding and not even showing any color. I have 2 lcd and both dont work. The thing is i did not store the lcds well ... just in a draw and they could have got damaged. I need to wire up a PIC or NXP arm since thats what i had it working with before. If it works then i know its my STM32 code

 

[AtomSoft]

hah , this sucks. It doesnt work on my LPC2103 with original code either. So that means i have 2 DEAD Lcds.. $40 gone I guess this should teach me to store things better oh well. nothing i can do.. .At lease i gain 2 touch screens heh.. im sure they have to be good still

 

[Ian Rogers]

Seems to me you need some anti static mats!! Nylon carpets and trainers are not electronic engineers best friends

 

[AtomSoft]

The thing is i dont have carpets. But i assume i build some static from couch and chairs. Ill look into that. But i assume its the darn ribbon cables for now