RE: [jallib] Sample of Matt for SD with fat 32 and problem with hex file

ZetWeeh Sun, 18 Sep 2022 08:27:09 -0700

Hi Rob

Thanks for your answer.

I use serial software with baudrate 115200. This is only for seeing what is happening.

Writing to the SD card is by SPI.

I use this code:

;sd_start_write(30) --get sd card ready for write at sector 30

; for count(molen) using teller loop

; sd_data_byte = molen[teller]

; format_dword_dec(serial_sw_data,teller,3,0)

; print_string(serial_data, " ")

; gegeven = molen[teller]

; print_byte_hex(serial_sw_data,gegeven)

; print_string(serial_data, " ")

; end loop

;sd_stop_write

The cursief part I made when I saw the problem by reading the SD card.

So without the cursief part I noticed the problem.

I too read the file on the SD card in Windows to be sure where was the problem.

When I copy the file to the SD card in Windows: it works fine.

I suppose the delay is coming after

sd_data_byte = molen[teller]

but how long?

Kind regards,

Peter

Verzonden vanuit Mail voor Windows

Van: Rob CJ
Verzonden: zaterdag 17 september 2022 17:37
Aan: [email protected]
Onderwerp: Re: [jallib] Sample of Matt for SD with fat 32 and problem with hex file

Hi Peter,

I do not have enough information to answer your question. Which serial library are you using? Do you have a delay in writing to the serial interface since the SD card will be much faster than the serial interface and it might be that your computer is not able to keep up with it.

Kind regards,

Rob

Van: [email protected] <[email protected]> namens Zet Weeh <[email protected]>
Verzonden: donderdag 15 september 2022 11:40
Aan: jallib <[email protected]>
Onderwerp: [jallib] Sample of Matt for SD with fat 32 and problem with hex file

Hi everybody

I have a picture in hex that is working fine on an oled.

I want to use it on a sd-card that's build in ILI9341.

When I use the sample of Matt I can write and read all of the sample; so it's

working fine.

The hex file is 500 bytes so one cluster.

When I want to write and read the hex to the SD I can see in RealTerm

that the writing is going fine till byte 400 and then it becomes a mesh.

I changed the baudrate but that did not help. Has anybody a suggestion what is going wrong and what to do?

Peter

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RE: [jallib] Sample of Matt for SD with fat 32 and problem with hex file

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