The reason why the Base64 decoder is not working is because the buffer for storing the bit is a bit too short, I changed the buffer into a 32 bits variable so it can store all the 24 bits. After that I found that the if condition which will split Read more…
My next task would be to work on making the HTTP to upload the data in data-form instead of file form. I had the text field input integrated with my current HTTP code so I tried to upload a 350KB file with it. It turns out that the upload is Read more…
After scratching the surface into the world of SD cards and how they store data, almost all of the week was spent into trying to figure out as much as possible about the abilities of these storage devices. Admittedly, I was led astray by my own curiosity about the File Read more…
During the process of trying to write my own MDD stack, I found a comment in the code given by Microchip. It states: //Check if all attempts failed and we timed out. Normally, this won’t happen, //unless maybe the SD card was busy, because it was previously performing a //read Read more…
I recheck my functions to make sure that the three functions are doing the same thing as the one function. It turns it should be. Then, after some hacking and testing, I found out that the string I declared in the main function will be written into the SD card. Read more…
It turns out that issue of connection timeout, random protocol data is caused by the fact I did not call the write function after TCP and Ethernet layer processes. The write function is then called in the Ethernet layer (ETH97J60.c). The function that is modified is MACGetArray(). After this modification, Read more…
Continuing from the last week, the reason that why the connection will be timed out when uploading a larger file is due to the modification I made to calculate the data size uploaded. The method was removed for the mean time and tested the code out. It turns out that Read more…
The previous function of reading a sector is using a 512 bytes buffer, by doing minor modifying on the tightest loop to write into a pointer instead of a buffer. The function can read from sector indefinitely (theoretically) using multi-block read. If a read is less than 512 bytes, it Read more…
First Modification (29 June 2013) Three text files are created with size of 35 KB, 175KB and 350 KB. The files were created by simply duplicating the whole 35 KB text file five times and 10 times respectively. By using the Timer1 module created last week, the read time for Read more…
Uploading Large Files Since small files can be uploaded, now it is time to test with uploading large file (350 KB). Firstly, I try to generate a random text file by using the dd command. It turns out that the file generated by it has a lot of weird characters, Read more…