Hi, this works from example 3, assuming the array is a constant (you didn't
show the array in your example).
const byte MARILYN[504] =
{0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,
0x42,0x42,0x42,0x42}
-- fill the sector buffer with data
for 504 using step1 loop
sd_sector_buffer[step1] = MARILYN[step1]
end loop
-- write the sector buffer to sector 20
sd_write_sector_address(20)
-- 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 504 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
On Monday, February 20, 2023 at 11:05:35 PM UTC-5 Matthew Schinkel wrote:
> 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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