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Hi,
I would like to do that I start transmit via RS232 when I press button. It is part of my code:
if DBLoad = '0' then --
Uart_Rdy <= '0'; -- Make sure handshake is immediately busy
UartFSM <= FSM_Load;
else
Uart_Rdy <= '1';
UartFSM <= FSM_Idle;
end if;
but it causes that...
It is to inform UART controller to send prepared data. I set it to '1' when it is one of FSM state but don't want that UART repeat sending so after inform it I would like to set this signal to '0'.
Hi,
like you deduced, I don't want to use file system, just read/write raw data. Firstly want to initialize card, see responses, registers. Then I want rather to write something. It should be easy to see that data by PC reader and hex editor, I hope. Additionally it seems to me that writing is...
I'd like to meddle in because I'm learning now VHDL and I read that what is in process is executed sequentially. I thought I can expect that 'if' in motote code will be first and even if there are other assignments, they are after so they will wait. Are in process other legerdemains which impair...
Hi,
to accomplish Ultra High Speed (UHS) it is needful to use SD Bus mode, not SPI mode. So card is the weakest link.
1. One thing niggles me, if I will get some responce into the input, can I store it in some signal declared in architecture? Will be it keeped after transmission there and I...
As I wrote I read about communication protocol. I also saw VHDL and C examples with SPI usage (from forum too, I read all threads on forum about SD cards controllers). So I hope it will not be the problem when I will start with real device, but thanks for links:)
PS. ChipScope is not beginners...
Hi,
yes, that's my goal. I saw other projects and have idea how to build it. I'm also familiar with "SD Specifications Part 1 Physical Layer Simplified Specification Version 3.01", "SanDisk SD Card Product Manual Version 2.2" and others docs, so I know what kind of commands I should send and...
Re: Read response signal
I apologize that I didn't answered here so long. This "appliance" (I see this word is used rather for household machines :D, sorry for my english) is SD card.
Its communication interface has one command line and up to four data lines, so:
1a. I have to read command...
Hi everyone,
I start with FPGA now. At the beginning have one simple question. By my FPGA I try to communicate with some appliance. How could I read a response signal the easiest? If it comes into one of declared STD_LOGIC port. My FPGA is Spartan 3 (I use Xilinx developing software obviously)...
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