📄 upsd_usb.c
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/* `=========================================================================`
***************************************
**** * * ****
Title: UPSD_USB
File name: upsd_usb.c
Project name: USB Demo
*** ****
****************** * ******************
**** ****
Author: Petr PFEIFER
MPG Prague, Czech Republic
**** * * ****
***************************************
$Version: 0.107a Build: April 30, 2004
$Version: 0.107 Build: 2004-04-29,17:55:46
Description:
============
USB driver module for uPSD3200 chip.
Improved version of USB demo v7
Version 0.105 - GetStatus added
Notes:
======
- do not change EPx service routines
and the order of commands ...
..........................
. .
. ****************** .
. **PPPPPPPPPPPPPPPP .
. *PPPP*******PP**** .
. **PPP********PP*** .
. ***PPP******PP**** .
. *****PPP****PP**** .
. *****PPP****PP**** .
. PPPPPPPP****PP**** (R) .
. .
..........................
=-=-=-=-=-=
=-=-=-=-=-=-=-=-=-=-=-=-=
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Copyright 2004 ST Microelectronics
This code/file is provided as is and has no warranty,
implied or otherwise. You are free to use/modify any of the provided
code at your own risk in your applications with the expressed limitation
of liability (see below) so long as your product using the code
contains at least one uPSD products (device).
LIMITATION OF LIABILITY:
========================
NEITHER STMicroelectronics NOR ITS VENDORS OR AGENTS
SHALL BE LIABLE FOR ANY LOSS OF PROFITS, LOSS OF USE, LOSS OF DATA,
INTERRUPTION OF BUSINESS, NOR FOR INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OF ANY KIND WHETHER UNDER THIS AGREEMENT OR
OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
=-=-=-=-=-=-=-=-=-=-=-=-=
=-=-=-=-=-=
For current information on uPSD products,
please consult our pages on the World Wide Web:
www.st.com/psm
- - - - - - - - - - - -
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Czech Republic - Finland - France - Germany
Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore
Spain - Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
`========================================================================` */
#pragma NOAREGS
#include "upsd3200.h"
#include "upsd_usb.h"
//-- Variables ---------------------------------------------------------------
#define HID_DEVICE 1
// Constant Variables for USB configuration
extern const uchar code cUSCL_value;
// Constant Variables for USB Descriptors
extern const device_descriptor code deviceDesc;
extern const configuration_descriptor code configDesc;
extern const uchar code string0Desc[];
extern const uchar code string1Desc[];
extern const uchar code string2Desc[];
extern const uchar * const code stringDescTable[];
#if HID_DEVICE
extern const uchar code hidClassDesc[];
extern const uchar code hidClassDescSize;
extern const uchar code reportDesc[];
extern const uchar code reportDescSize;
extern const uchar code PhysicalReportDesc;
extern const uchar code PhysicalReportDescSize;
#endif
volatile uchar idata usbState;
volatile uchar idata ep1State; //added April 30, 2004
volatile uchar idata SuspendCounter;
setup_buffer setupPacket;
static uchar* pTransmitBufferEP0;
static int bytesToTransmitEP0;
static BOOL shortTransfer;
extern void OnDeviceConfigured();
void OnUSBReset()
/******************************************************************************
Function : void OnUSBReset()
Parameters : none
Description: USB driver module initialization routine, in USR ISR only !!!.
******************************************************************************/
{
pTransmitBufferEP0 = NULL;
bytesToTransmitEP0 = 0;
UADR = 0; // Disable USB hardware
UCON0 = uRX0E; // Enable EP0 for receiving only
UCON1 = 0; // Disable Endpoint 1
UCON2 = uEP1E; // Enable EP1
UADR = uUSBEN + 0; // Enable USB with default address 0
UIEN = ~(uMCUR+uEOPF+uRESUMIE);
// Enable all USB interrupts except uMCUR (MCU reset on USB reset) and EOP, ...
USTA = 0;
UISTA = 0; // Clear USB interrupts
IEA |= bEUSB;
}
void UsbInitialize()
/******************************************************************************
Function : void UsbInitialize()
Parameters : none
Description: USB driver module initialization routine after MCU startup.
******************************************************************************/
{
USCL = cUSCL_value; // Set USB clock prescaler
UIEN = 0; // Disable all USB interrupts
UADR = 0; // Disable USB hardware
OnUSBReset();
}
extern data char usr_cnt;
void STALL_EP0()
/******************************************************************************
Function : void STALL_EP0()
Parameters : none
Description: Stalls EP0.
This endpoint is halted or a control pipe request is not supported.
Endpoint can be unstalled by the next SETUP packet.
STALL is returned by a function in response to an IN token
or after the data phase of an OUT transaction.
It indicates that a function is unable to transmit or receive data,
or that a control pipe request is not supported.
******************************************************************************/
{
#pragma asm
anl UCON0,#uTSEQ0+uRX0E+uSTALL0+uTX0E ;mask
orl UCON0,#uSTALL0 ;clear TSEQ bit, STALL EP0
#pragma endasm
}
static BOOL TransmitBufferEP0()
/******************************************************************************
Function : static BOOL TransmitBufferEP0()
Parameters : none
Description: Transmits next segment of descriptor buffer (pTransmitBufferEP0).
This routine prepates 0..8 bytes of data from TransmitBufferEP0
at endpoint0. If no data is available in buffer, the endpoint is disabled.
According to USB standard, zero length packet is trasmitted at then end.
******************************************************************************/
{
data int i;
data int nBytes;
if (pTransmitBufferEP0) // If there is data going out...
{
#pragma asm // send zero length packet
xrl UCON0,#uTSEQ0 ;toggle TSEQ bit
anl UCON0,#uTSEQ0+uRX0E ;mask
#pragma endasm
if (!bytesToTransmitEP0) // If data has already been sent...
{
#pragma asm // send zero length packet
orl UCON0,#uTX0E ;enable transmit
#pragma endasm
pTransmitBufferEP0 = NULL; // If data has already been sent...
}
else
{
nBytes = bytesToTransmitEP0; // Transmit next chunk of data
if (nBytes > 8)
{
nBytes = 8;
}
UCON0 |= nBytes; // set FIFO size
for (i = 0; i < nBytes; i++) // Load data into FIFO
{
UDT0 = *pTransmitBufferEP0++;
}
if ((bytesToTransmitEP0 -= nBytes) == 0)
{
// For short transfers, we need to send a zero length terminator
if (!shortTransfer || (nBytes < 8))
{
pTransmitBufferEP0 = NULL; // it will be sent the next cycle
}
}
#pragma asm
orl UCON0,#uTX0E ; enable transmit
#pragma endasm
}
return TRUE;
}
#pragma asm // No data going out, so disable endpoint
anl UCON0,#uRX0E ;mask
orl UCON0,#uTSEQ0 ;set TSEQ bit
#pragma endasm
return FALSE;
}
void TransmitDataEP0(uchar* pData, int nBytes)
/******************************************************************************
Function : void TransmitDataEP0()
Parameters : (uchar* pData, int nBytes)
Description: Load and arm EP0 to transmit data.
This routine prepates 0..8 bytes of data at endpoint0 to be trasmitted.
Caller must then clear FIFO status flag (uTXD0F) to arm the endpoint.
******************************************************************************/
{
data unsigned char xBytes;
if (nBytes > EP0_SIZE) xBytes = EP0_SIZE; else xBytes = nBytes;
// Disable endpoint, set DATA0/1 sequence bit and FIFO size
#pragma asm
xrl UCON0,#uTSEQ0 ;toggle TSEQ bit
anl UCON0,#(uTSEQ0+uRX0E)
#pragma endasm
UCON0 |=xBytes; // set FIFO size
while (xBytes--)
{
UDT0 = *pData++; // Load data into FIFO
}
UCON0 |= uTX0E; // Enable endpoint
}
void TransmitDataEPx(int x, uchar* pData, int nBytes)
/******************************************************************************
Function : void TransmitDataEPx()
Parameters : (int x, uchar* pData, int nBytes)
Description: Loads EP1 or EP2 transmit FIFO.
Caller must then clear FIFO status flag (uTXD1F) to arm endpoint.
******************************************************************************/
{
data unsigned char xBytes;
if (nBytes > 8) xBytes = 8; else xBytes = nBytes;
// Disable endpoint, set DATA0/1 sequence bit, endpoint selection, and FIFO size
UCON1 &= ~uEP12SEL; //mask
UCON1 |= ((x == 2) ? uEP12SEL : 0); //set endpoint
UCON1 &= uTSEQ1+uEP12SEL; //mask
UCON1 ^= uTSEQ1; //toggle DATAx bit
UCON1 |= xBytes; //set FIFO size
while (nBytes--)
{
UDT1 = *pData++; // Load data into FIFO
}
UCON1 |= uTX1E; // Enable endpoint
UIEN |= uTXD1IE; // enable INT
}
//the following function changed on April 30, 2004
static void OnGetStatus()
/******************************************************************************
Function : static void OnGetStatus()
Parameters : none
Description: Handler for GET_STATUS control requests.
******************************************************************************/
{
#pragma asm // send zero length packet
orl UCON0,#uTSEQ0 ;set TSEQ bit
anl UCON0,#uTSEQ0+uRX0E ;mask, keep RX flag
orl UCON0,#2 ;set FIFO size
#pragma endasm
if((setupPacket.wIndex.lo == 0x00) & (setupPacket.wIndex.hi == 0x00)){//device
UDT0 = 1;
UDT0 = 0;
}
else if((setupPacket.wIndex.lo == 0x81) & (setupPacket.wIndex.hi == 0x00)){//endpoint1
if(ep1State == US_EP1STALL)
UDT0 = 1;
else
UDT0 = 0;
UDT0 = 0;
}
else{
STALL_EP0(); // No features currently implemented, so stall EP0
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