SCR in H3

[Dmitriy Zhuk]

         Hello guys.

I have issue regarding with smart card reader interface.

According to it's datasheet

http://linux-sunxi.org/images/4/4b/Allwinner_H3_Datasheet_V1.2.pdf page

"

 

Support FIFOs for receive and transmit buffers (up to 128 characters) with threshold

"

But in practice, the size of FIFO is only 16 bytes.

Is anybody worked with SCR interface?

May be I must to select size of FIFO in some REGISTER?

Thanks for help.

[martinayotte]

The H3 SPI has 64 bytes FIFO, so where did you find that it is 16 bytes ?

Why do you think that your issue is coming from FIFO size since smart card reader usually has short messages ?

In Mainline, we are applying a patch for interrupt driven FIFO that let manage messages up to 65535 bytes.

 

[zador.blood.stained]

5 minutes ago, martinayotte said:

The H3 SPI has 64 bytes FIFO, so where did you find that it is 16 bytes ?

SCR is the smart card reader interface, it's not related to SPI. I don't think there is an existing or even WIP driver for it anyway.

[Dmitriy Zhuk]

Yes, this is SCR, not SPI.

May be somebody worked with it...

[martinayotte]

As Zador said, I doubt any driver even exist.

Easier to get an SPI reader and manage it with python library...

 

[Dmitriy Zhuk]

I found the driver for similar processor:

https://github.com/allwinner-zh/linux-3.4-sunxi/tree/master/drivers/char/sunxi-scr

[Hardik]

Hi Dmitriy Zhuk,

 

Have you tested the driver you found for H3. ( https://github.com/allwinner-zh/linux-3.4-sunxi/tree/master/drivers/char/sunxi-scr )

 

I have an Orange pi pc plus v1.1 but I don't know about SCR pinout.

 

Could some please help me to get the right driver and pinout for the same?

 

Thanks,

Hardik

 

[Dmitriy Zhuk]

               Hello, Hardic.

I didn't test it.

I only investigated it.

Do you need help yet?