2008-12-15 06:19 PM
interfacing sd/mmc card
2011-05-17 03:56 AM
Hi, can I interface a sd/mmc card with a STM32F103 without being with SPI interface?I want to capture video from a camera (VS6724) VGA 30 fps (only 20 seconds) and store in a memory card, I my question is if I can do that directly without buffer the video in a RAM.
thank you2011-05-17 03:56 AM
You are limited to the SPI interface for all MCU without the SDIO interface. The STM32F103ZE on the STM3210E-EVAL have such a port.
If your board/mcu supports it, there is an example application at exemples/sdio/sdcard with a multiblock-write sequence. Your limiting factor here is clearly speed, as you need to write a lot of data in a short timeframe. I suggest you run the example app with a very fast SDHC card (class 6), and benchmark your top speed. If it is not enough, nothing will do and you will need a ram buffer. On another thread called ''SDIO + Fat16/Fat32'' there is an exemple of a FAT32 application over SDIO and SPI so you can use normal windows compatible file system on your card.2011-05-17 03:56 AM
Quote:
On 15-12-2008 at 20:26, Anonymous wrote: Hi, can I interface a sd/mmc card with a STM32F103 without being with SPI interface?I want to capture video from a camera (VS6724) VGA 30 fps (only 20 seconds) and store in a memory card, I my question is if I can do that directly without buffer the video in a RAM. thank you Can I ask you, where did you get the camera from (VS6724)? I need a couple of them plus connectors for my project as well. If anyone knows a source of above please let me know. I had once the samples promised through an Australian distributor, but after a year of waiting the people from ST changed their minds and deny any samples even I was happy to pay for them. Jan