Interfacing SD card with P89V664

Hello everyone,
I want to interface SD card with P89V664 (8051 core, 2kb RAM, 64kb flash, SPI and I2C). I want to store data in the SD card and read it back from SD card using this controller.

Can anyone help me in this matter ?

Also, before I interface that, I want to know what is the access time of the SD card, because I need fast data rates...

See rickey MMC/SD Card interfacing and FAT16 Filesystem with 8052 : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes
I haven't tried it myself.

The other alternative is the OpenLog here..OpenLog - SparkFun Electronics

Ian

In the above links, they are using the SD card in SD mode, but, I wanted to use it in SPI mode because it is comparatively easy to use.

There are a few SPI examples on the web... I use arduino with an SPI SD interface much faster / cheaper this way.

If you're reading the data back through the controller you don't have to bother with the FAT file system, which can be a big bloody mess. You will still have to read and write in blocks of 512 bytes, though.

Find the SD/MMC card spec on the web. It will detail the sequence for putting the card into SPI mode. In brief, it goes like this:
1. Set CS high
2. Clock a number of times.
3. Set CS low.
4. Send CMD0 with a valid CRC (0x95).
5. Get a valid response (0x01).
6. Try sending CMD1 a number of times until you get a valid response (0x00) or a timeout. The commands from here on don't need a valid CRC.
7. Set CS high and you're now in SPI mode.

@upand_at_them and Ian Rogers....
Thanx for your help....
and, as you have done it, can you tell me the access time for reading a single byte (if possible) or a block of 512 bytes... ?
The controller I am using can provide upto 20Mhz as SPI clock....