Line Input -- How many bytes ??

NickUK · Joined: 15 Nov 2005 Posts: 25 Location: Ashbourne

Hello All,

I am currently testing the AVR-DOS and have successfully been writing ASCII data to and from the SD card. The data is from a log of temperatures and input status data
so you get something like:-

24/06/09,12:23:00,Sensor 1=20.34C,Input 1=ON .... up to 128 bytes

Interestingly when I increased the number of temperate sensors and make the string longer the writing is correct, I checked the SD card on a PC.

But if a use the "Line Input" command if the line is longer than around 82 bytes then I get the line split up when reading back on the AVR

I have checked my line input variable which is 128 bytes so I should not get a problem.

I have also checked the SD card with the FS Interpreter and if I enter
"type tmp.log" then I get the same result, which leads me to think that there is a limitation on the "line input" reading.

Can anyone check this for me and give me any tips on increasing the "line input" value so that I can read the full 128 bytes in my data line.

Regards

Nick

oe9vfj · Joined: 17 Jun 2004 Posts: 269 Location: Austria, Hard

The length in LINE INPUT is limited to the defined length of the String in BASCOM.
Please note that in the FS_Interpreter the used variable to read in from the file is limited to 100 Charcaters and the length in the command "WL" (Write Line) is limited to 70 Characters. Some limitations in the FS_Interpreter are not limitations of AVR-DOS. They are due to the limited RAM resources.

you can test this code snippet