ethernetsdstm32
I have an STM32F4Discovery board, and I have implemented an HTTP server on it using the LwIP v1.41 stack. I also have implemented a microSD card reader with SDIO and FatFs, and USB FS as a mass storage device. All of this is working fine together.
Can I store the webpages on the SD card in binary format instead of using the fsdata.c inside the microcontroller flash? If so, how can I do that? Is there an example?
Is your memory map of each image location correct?
[...] pull-up resistor(10k) on SDI(MISO) line. With it SD card works good, and after initialization i can remove it and the card keeps to work, so i think the problem is really only during card initialization.
The SD card pins will operate in "open drain" mode after power-on. They need a pullup to output "high" until you switch the card to SPI mode.
Anyway, this create another problem... if i use a pull-up resistor on SDI line, then the MCP28S08 can't read the correctly value of GPIO port.
A 10k resistor will draw only 0.33 mA at 3.3 V. SPI outputs should be a lot stronger than that. You could try a bigger resistor, around 47 kOhm for a start, but you might need to lower the initialization frequency for your SD card.
Best Answer
Yes, you can do it.
For example, when you receive request
GET /file.txt HTTP/1.1you can check if such file exists, open it, sent relevant headers and file contents.Web server demo from LwIP will require (as stated on http://lwip.wikia.com/wiki/Sample_Web_Server) extensive rewrite, but in custom HTTP server it is possible.