c code, usb, and at89c5131

[nemuri]

at89c5131 usb

hello,
i'm trying to understand how the at89c5131 usb controller works.
I've downloaded the c code examples at atmel site, but there is something i don't get : where are implemented the functions like usb_read_byte, Usb_clear_rx, usb_rx_complete.... ?
I can see they are used a lot, i know what they do, but i can't find them in extenso.

Thank you

 

[silvio]

at89c5131 usb code

where are implemented the functions like usb_read_byte, Usb_clear_rx, usb_rx_complete.... ?
I can see they are used a lot, i know what they do, but i can't find them in extenso.

Those are not functions. Are macros. You can get them from usb_drv.h header file

#define Usb_read_byte ( )       ( UEPDATX )

UEPDATX (USB Endpoint X FIFO Data) it's a SFR register at CFh

To read data from an endpoint, select the correct endpoint number in UEPNUM and
read the UEPDATX register. This action automatically decreases the corresponding
address vector, and the next data is then available in the UEPDATX register.

That's exactly what function bellow is doing:

Uchar* usb_read_packet (Uchar ep_num, Uchar* rbuf, Uchar data_length)
{
Uchar i;

  Usb_select_ep(ep_num);

  for (i = data_length; i != 0 ; i--, rbuf++) 
     { *rbuf = Usb_read_byte(); } // you can write this as *rbuf = UEPDATX;

  return rbuf;
}

#define Usb_clear_rx ()  ( UEPSTAX &= ~MSK_RXOUT )
#define Usb_rx_complete ()     ( UEPSTAX & MSK_RXOUTB0B1 )

UEPSTAX (USB Endpoint X Status) it's a SFR register at CEh

#define MSK_RXOUT     0x02
#define MSK_RXOUTB0B1 0x42  // more on ext_5131.h header file

Read more about UEPSTAX register and meanings of his bits on AT89C5131 data sheet, pag 138 of 175 (doc4136.pdf Atmel site)

 

[subham chaudhary]

at89c5131 usb c

hello all!

> i have been going through the same problem....regarding USB CODE for AT89C5131A-L.

> I have established communication between PC and USB. I can read MY microcontrilller's PID no.

>what i need is to tackle/monitor microcontrolller's port pins through my code.
but for that i need USB module to send my data to microcontroller's port.

> can u people help me out sending the USB MODULE or AT89C5131A-L code.

>or otherwise guide me to a proper way to the solution of the problem.

thankyou all!

i m waiting!!!!!!!!!