Data reading problem from dgus flash !DMT80600L104_01WT

cmlbay54

Hi everyone !
I am having trouble reading and writing to the flash memory of the screen.
I write data to some addresses. however, when I turn the device off and on, it reads different values ​​while reading.

The addresses and data I wrote are as follows:
address: 0x01DE 2EE4  ----> written value: 8000(decimal) = (0x1F40)
address: 0x01DE 0FA0  ----> written value: 0
address: 0x01DE 2EF2  ----> written value: 0

When I turn the device off and on, the data I read from these addresses are as follows:
address: 0x01DE 2EE4  ----> read value: 48960(decimal)  = (0xBF40)
address: 0x01DE 0FA0  ----> read value: 0x02000000
address: 0x01DE 2EF2  ----> read value: 0x32000000


where could the problem be? Could there be an error in UART when sending data to dgus flash? because I am sending a lot of writing commands one after another. does this cause an error? If so, what solution will be required?

931608J

What is the LCD model you are using?DMT80600L104_01WT？
Do you use the 0X90 or 0X91 ?

cmlbay54

yep. my lcd model is DMT80600L104_01WT and I use 0x90,0x91 command.

931608J

cmlbay54 发表于 2020-3-23 20:17
yep. my lcd model is DMT80600L104_01WT and I use 0x90,0x91 command.

Please send me the complete instructions.

cmlbay54

void dg_write_data_4(uint16_t adres,uint32_t data){
        dec_to_hex2_adres(adres);  // convert decaimal values to hex values
        dec_to_hex_4(data);           // convert decaimal values to hex values
       
        uart_putc(0xAA);  //head.
        uart_putc(0x90);
        uart_putc(0x55);
        uart_putc(0xAA);
        uart_putc(0x5A);
        uart_putc(0xA5);
       
        uart_putc(0x01);                //adres and values.
        uart_putc(0xDE);
        uart_putc(dizi_16a[0]);
        uart_putc(dizi_16a[1]);
        uart_putc(dizi_32[0]);    //values
        uart_putc(dizi_32[1]);
        uart_putc(dizi_32[2]);
        uart_putc(dizi_32[3]);
       
        uart_putc(0xCC);                        //tail.
        uart_putc(0x33);
        uart_putc(0xC3);
        uart_putc(0x3C);
}

This is my flash write function. it will be very long and complicated if I send all the codes. is that enough for you to understand?

cmlbay54

I use this function to read.

void dg_read_address_4(uint16_t adres){  
        dec_to_hex2_adres(adres);
       
        uart_putc(0xAA);                //head.
        uart_putc(0x91);
        uart_putc(0x55);
        uart_putc(0xAA);
        uart_putc(0x5A);
        uart_putc(0xA5);

        uart_putc(0x01);                //adres and lenght.
        uart_putc(0xDE);
        uart_putc(dizi_16a[0]);
        uart_putc(dizi_16a[1]);
        uart_putc(0x00);
        uart_putc(0x04);                        //4 byte.
       
        uart_putc(0xCC);                        //tail.
        uart_putc(0x33);
        uart_putc(0xC3);
        uart_putc(0x3C);
}

After this command, I save the information from uart with this function:

uint32_t dg_read_receive_data_4(){
        deger_32[0] = RXBUF[7];                //okunan degerler sırası ile değer dizisine kaydedilyor. . .
        deger_32[1] = RXBUF[8];
        deger_32[2] = RXBUF[9];
        deger_32[3] = RXBUF[10];
        hex_to_dec_4();                                //A value of 4 bytes is converted to 32-bit integer.
        return dgus_okunan32;
}

cmlbay54

is there anyone who can help?
If I save the data in the range 0x00000000-0x01DDFFFF, the data is deleted when the device turns off. If I save the data in the range 0x01DE0000-0x01DEFFFF, it reads the data incorrectly when reading. I wonder why?

931608J

cmlbay54 发表于 2020-3-24 14:17
is there anyone who can help?
If I save the data in the range 0x00000000-0x01DDFFFF, the data is del ...

User memory range:0x0000-0x0FFFF，64KB Flash。
My test：
TX:AA 90 55 AA 5A A5 01 DE 0000 000A CC 33 C3 3C
RX:AA 90 4F 4B CC 33 C3 3C

TX：AA 91 55 AA 5A A5 01 DE 0000 0002 CC 33 C3 3C
RX:AA 91 55 AA 5A A5 01 DE 0000 0002  000A CC 33 C3 3C

Power-off and power-on tests are all correct data.

DWIN-ARK

0x90 and 0x91 of T5UIC2 do not distinguish between random storage and sequential storage. The address range is 0000-FFFF. The first two bytes are fixed at 01 DE. You can see the description of the figure, modify the program and test it.

cmlbay54

I'm already following your advice. but that's exactly the problem:
I saved '0' to address 0x0000 and address 0x0FA0. I change the value of 0x0000 and write 25 for example. However, the value at address 0x0FA0 changes automatically and becomes 0x19000000. whereas I did not change the value at 0x0FA0. Why does its value change itself?