Hi, ok so the original sample is working? I'll try what you have but one
thing I see is that your loop is 512 but marilyn is only 504. The loop
should only be the size of the array.
for *504* using teller loop
sd_sector_buffer[teller] = marilyn[teller]
end loop
Matt.
On Monday, February 20, 2023 at 6:37:02 PM UTC-5 [email protected] wrote:
> Hi Matt
> I know that and I tried it before I wanted to write an array to the SD
> card.
> It works perfect.
> The problem is how to write an array to the SD card.
>
> Regards,
> Peter
>
> Op 21 feb. 2023 om 00:21 heeft Matthew Schinkel <[email protected]>
> het volgende geschreven:
>
> Hi, have you tried another sd card? What PIC are you using?
>
>
> Please try example 3 in the sample
>
> ;
> --------------------------------------------------------------------------------
> ; -- EXAMPLE #3 write to 2 sectors using a sector buffer at a address
> ; -- user friendly and fastest.
> ;
> --------------------------------------------------------------------------------
> ; -- fill the sector buffer with data
> ; for 512 using step1 loop -- loop till the end of
> the sector buffer
> ; sd_sector_buffer[step1] = "B" -- set each byte of data
> ; end loop
> ; -- write the sector buffer to sector 20
> ; sd_write_sector_address(20)
> ; for 512 using step1 loop -- loop till the end of
> the sector buffer
> ; sd_sector_buffer[step1] = "C" -- set each byte of data
> ; end loop
> ; -- write the sector buffer to sector 21
> ; sd_write_sector_address(21)
> ; --
> ; -- read back the same sectors
> ; -- read sector 20 into the sector buffer
> ; sd_read_sector_address(20)
> ; -- now send it to the serial port
> ; for 512 using step1 loop -- loop till the end of
> the sector buffer
> ; serial_write (sd_sector_buffer[step1]) -- send each byte via serial
> port
> ; end loop
> ; -- read sector 21 into the sector buffer
> ; sd_read_sector_address(21)
> ; -- now send it to the serial port
> ; for 512 using step1 loop -- loop till the end of
> the sector buffer
> ; serial_write (sd_sector_buffer[step1]) -- send each byte via serial
> port
> ; end loop
>
> Matt.
>
> On Monday, February 20, 2023 at 12:12:04 PM UTC-5 [email protected] wrote:
>
>> Hi Matt
>> I think this is a question for you. You made a beautiful sample for
>> writing to a sd card.
>> Every start of the program I use the part of your lib to control the
>> connection to the sd card.
>> I can write and read the sd card byte for byte. I use a bitmap image of
>> Marilyn Monroe of 504 bytes.
>>
>> The half of the next program works perfect:
>> var byte gegeven
>> var byte data
>> var word step1
>> var word teller
>>
>> sd_start_write(50)
>> for count(marilyn) using teller loop
>> sd_data_byte = marilyn[teller]
>> end loop
>> sd_stop_write
>> This works perfect.
>>
>>
>> I also tried to write to the sd card with a 'sector buffer' because most
>> arrays are larger.
>> But first the array of Marilyn. It can be written in one sector.
>> Attempt 1:
>> print_string(serial_data, "Writing to sector 100")
>> print_crlf(serial_data)
>>
>> sd_start_write(100)
>> --fill the sector buffer
>> for 512 using teller loop
>> sd_sector_buffer[teller] = marilyn[teller]
>> end loop
>> -- write the sector buffer to sector 100
>> sd_write_sector_address(100)
>> sd_stop _write
>>
>> I also tried:
>> Attempt 2:
>>
>> sd_start_write(150)
>> for 512 using step1 loop
>> gegeven = marilyn[step1]
>> sd_sector_buffer[step1] = gegeven
>> end loop
>> -- write the sector buffer to the sd card
>> sd_write_sector()
>> sd_stop _write
>>
>> Both attempts does not work.
>> I get rubbish when I read the sectors.
>> Can you tell me how I get it working.
>>
>> Regards,
>> Peter
>>
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