How to translate wire.requestfrom (arduino) to c?

[electroRF]

Thanks mister T.
I play around with these delays and update.

The GLCD Datasheet

 

[misterT]

Have you noticed that the datasheet says that the device address is 0x46. You are using 0x8C.

 

[electroRF]

Hi,

I tried using at the beginning 0x46, but failed to write to the GLCD.

Then I guess it's the 7-bit address - so for WRITE i used 0x8C (which is shifting 0x46 1 step left) - and it worked.

 

[misterT]

Then I guess it's the 7-bit address - so for WRITE i used 0x8C (which is shifting 0x46 1 step left) - and it worked.

Oh, yes.. that is one thing that should be mentioned in the datasheet. At least when they represent it as a hexadecimal. Hex value strongly implies an 8 bit bit-pattern. Some (most?) datasheets include the R/W bit in the address. Officially the address is 7bits of course.

 

[electroRF]

Hi T,

I tried reading the FW, and I read 0x01.

I still haven't tried the delays, however 0x01 sounds suspicious, i'm not sure it is the actual FW version of the GLCD.

 

[misterT]

Hi T,

I tried reading the FW, and I read 0x01.

I still haven't tried the delays, however 0x01 sounds suspicious, i'm not sure it is the actual FW version of the GLCD.

I think that sounds promising at least. Better than zero. Sucks that they don't give any info about firmware versions in the datasheet.

Play with the delays. I saw this one thread where the code had 500ms delays between different drawing instruction. And he also had 500ms delay before he did anything... to let the glcd initialize.

 

[electroRF]

well, I tried so many delays, but I keep reading zeros.
I also tried as you suggested to place other commands between the "Write Cursor" and "Read Cursor", but failed.
something is wrong with this GLCD or with its manual.

 

[MohamedAbid]

Can anyone send me a copy of the GLCD-FLEXEL.pdf and the C library of the Web4Robot GLCD-FLEXEL board please?