192 lines
6.0 KiB
C
192 lines
6.0 KiB
C
/****************************************************************************************
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| Description: bootloader USB device interrupt/event handler source file
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| File Name: usb_istr.c
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| Notes: based on an example from STMicroelectronics
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|----------------------------------------------------------------------------------------
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| C O P Y R I G H T
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|----------------------------------------------------------------------------------------
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| Copyright (c) 2011 by Feaser http://www.feaser.com All rights reserved
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|----------------------------------------------------------------------------------------
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| L I C E N S E
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|----------------------------------------------------------------------------------------
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| This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
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| modify it under the terms of the GNU General Public License as published by the Free
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| Software Foundation, either version 3 of the License, or (at your option) any later
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| version.
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| OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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| without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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| PURPOSE. See the GNU General Public License for more details.
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| You should have received a copy of the GNU General Public License along with OpenBLT.
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| If not, see <http://www.gnu.org/licenses/>.
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| A special exception to the GPL is included to allow you to distribute a combined work
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| that includes OpenBLT without being obliged to provide the source code for any
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| proprietary components. The exception text is included at the bottom of the license
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| file <license.html>.
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****************************************************************************************/
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/****************************************************************************************
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* Include files
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****************************************************************************************/
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#include "usb_lib.h"
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#include "usb_prop.h"
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#include "usb_pwr.h"
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#include "usb_istr.h"
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/****************************************************************************************
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* Global data declarations
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****************************************************************************************/
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/* ISTR register last read value */
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volatile uint16_t wIstr;
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/* SOFs received between 2 consecutive packets */
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volatile uint8_t bIntPackSOF = 0;
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/* function pointers to non-control endpoints service routines */
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void (*pEpInt_IN[7])(void) =
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{
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EP1_IN_Callback,
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EP2_IN_Callback,
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EP3_IN_Callback,
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EP4_IN_Callback,
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EP5_IN_Callback,
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EP6_IN_Callback,
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EP7_IN_Callback,
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};
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void (*pEpInt_OUT[7])(void) =
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{
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EP1_OUT_Callback,
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EP2_OUT_Callback,
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EP3_OUT_Callback,
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EP4_OUT_Callback,
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EP5_OUT_Callback,
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EP6_OUT_Callback,
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EP7_OUT_Callback,
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};
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/****************************************************************************************
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** NAME: USB_Istr
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** PARAMETER: none
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** RETURN VALUE: none
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** DESCRIPTION: USB interrupt service routine to process USB related event. Note that
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** this function can also be called by the software program to operate
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** the USB functionality in a polling way.
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**
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****************************************************************************************/
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void USB_Istr(void)
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{
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wIstr = _GetISTR();
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#if (IMR_MSK & ISTR_SOF)
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if (wIstr & ISTR_SOF & wInterrupt_Mask)
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{
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_SetISTR((uint16_t)CLR_SOF);
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bIntPackSOF++;
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#ifdef SOF_CALLBACK
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SOF_Callback();
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#endif
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}
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#endif
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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#if (IMR_MSK & ISTR_CTR)
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if (wIstr & ISTR_CTR & wInterrupt_Mask)
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{
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/* servicing of the endpoint correct transfer interrupt */
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/* clear of the CTR flag into the sub */
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CTR_LP();
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#ifdef CTR_CALLBACK
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CTR_Callback();
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#endif
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}
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#endif
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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#if (IMR_MSK & ISTR_RESET)
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if (wIstr & ISTR_RESET & wInterrupt_Mask)
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{
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_SetISTR((uint16_t)CLR_RESET);
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Device_Property.Reset();
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#ifdef RESET_CALLBACK
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RESET_Callback();
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#endif
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}
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#endif
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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#if (IMR_MSK & ISTR_DOVR)
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if (wIstr & ISTR_DOVR & wInterrupt_Mask)
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{
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_SetISTR((uint16_t)CLR_DOVR);
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#ifdef DOVR_CALLBACK
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DOVR_Callback();
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#endif
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}
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#endif
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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#if (IMR_MSK & ISTR_ERR)
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if (wIstr & ISTR_ERR & wInterrupt_Mask)
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{
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_SetISTR((uint16_t)CLR_ERR);
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#ifdef ERR_CALLBACK
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ERR_Callback();
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#endif
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}
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#endif
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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#if (IMR_MSK & ISTR_WKUP)
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if (wIstr & ISTR_WKUP & wInterrupt_Mask)
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{
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_SetISTR((uint16_t)CLR_WKUP);
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Resume(RESUME_EXTERNAL);
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#ifdef WKUP_CALLBACK
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WKUP_Callback();
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#endif
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}
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#endif
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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#if (IMR_MSK & ISTR_SUSP)
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if (wIstr & ISTR_SUSP & wInterrupt_Mask)
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{
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/* check if SUSPEND is possible */
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if (fSuspendEnabled)
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{
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Suspend();
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}
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else
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{
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/* if not possible then resume after xx ms */
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Resume(RESUME_LATER);
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}
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/* clear of the ISTR bit must be done after setting of CNTR_FSUSP */
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_SetISTR((uint16_t)CLR_SUSP);
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#ifdef SUSP_CALLBACK
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SUSP_Callback();
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#endif
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}
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#endif
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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#if (IMR_MSK & ISTR_ESOF)
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if (wIstr & ISTR_ESOF & wInterrupt_Mask)
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{
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_SetISTR((uint16_t)CLR_ESOF);
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/* resume handling timing is made with ESOFs */
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Resume(RESUME_ESOF); /* request without change of the machine state */
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#ifdef ESOF_CALLBACK
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ESOF_Callback();
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#endif
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}
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#endif
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} /*** end of USB_Istr ***/
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/*********************************** end of usb_istr.c *********************************/
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