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…
It turns out that the TCP/IP MDD Demo given by Microchip is not that useful. It mainly redefined all the functions to open webpages stored in SD cards instead. They did not modify the part where the original used to upload a file.But a file named “FileSystem.c” is particularly useful Read more…
The PICDEM.NET 2 has a stand-alone Ethernet controller, ENC28J60 but the project is not going to use that stand-alone Ethernet controller. The project will use the Ethernet driver for the PIC18F97J60, which is the ETH97J60. It is interesting to note that the PICDEM.NET 2 has two Integrated Connector Modules (ICMs), Read more…
I continued working on the task with the SD cards. I first tested out the read and write example code in Microchip’s manual on Implementing File I/O Functions Using Microchip’s Memory Disk Drive File System Library (AN1045). The code can be found on page 10 on the manual. The files that I Read more…
I came to the office on 25th June, I was introduced by Dr. Shawn around the office and how to login to the computer I will be working on for this week. And after some tutorials by him, I was able to login to the computer and access all the Read more…