237 lines
6.7 KiB
C
237 lines
6.7 KiB
C
/**
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******************************************************************************
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* @file usb_istr.c
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* @author MCD Application Team
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* @version V4.0.0
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* @date 21-January-2013
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* @brief ISTR events interrupt service routines
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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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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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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__IO uint16_t wIstr; /* ISTR register last read value */
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__IO uint8_t bIntPackSOF = 0; /* SOFs received between 2 consecutive packets */
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__IO uint32_t esof_counter =0; /* expected SOF counter */
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__IO uint32_t wCNTR=0;
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/* Extern variables ----------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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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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* Function Name : USB_Istr
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* Description : ISTR events interrupt service routine
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* Input : None.
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* Output : None.
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* Return : None.
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*******************************************************************************/
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void USB_Istr(void)
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{
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uint32_t i=0;
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__IO uint32_t EP[8];
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wIstr = _GetISTR();
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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_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_ESOF)
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if (wIstr & ISTR_ESOF & wInterrupt_Mask)
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{
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/* clear ESOF flag in ISTR */
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_SetISTR((uint16_t)CLR_ESOF);
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if ((_GetFNR()&FNR_RXDP)!=0)
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{
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/* increment ESOF counter */
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esof_counter ++;
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/* test if we enter in ESOF more than 3 times with FSUSP =0 and RXDP =1=>> possible missing SUSP flag*/
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if ((esof_counter >3)&&((_GetCNTR()&CNTR_FSUSP)==0))
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{
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/* this a sequence to apply a force RESET*/
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/*Store CNTR value */
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wCNTR = _GetCNTR();
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/*Store endpoints registers status */
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for (i=0;i<8;i++) EP[i] = _GetENDPOINT(i);
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/*apply FRES */
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wCNTR|=CNTR_FRES;
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_SetCNTR(wCNTR);
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/*clear FRES*/
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wCNTR&=~CNTR_FRES;
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_SetCNTR(wCNTR);
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/*poll for RESET flag in ISTR*/
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while((_GetISTR()&ISTR_RESET) == 0);
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/* clear RESET flag in ISTR */
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_SetISTR((uint16_t)CLR_RESET);
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/*restore Enpoints*/
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for (i=0;i<8;i++)
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_SetENDPOINT(i, EP[i]);
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esof_counter = 0;
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}
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}
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else
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{
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esof_counter = 0;
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}
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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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} /* USB_Istr */
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/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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