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| /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** |
| * File Name : usb_int.c |
| * Author : MCD Application Team |
| * Version : V4.0.0 |
| * Date : 09/29/2008 |
| * Description : Endpoint CTR (Low and High) interrupt's service routines. |
| ******************************************************************************** |
| * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
| * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
| * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
| * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
| * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
| * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
| *******************************************************************************/ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "usb_lib.h" |
| /* Private typedef -----------------------------------------------------------*/ |
| /* Private define ------------------------------------------------------------*/ |
| /* Private macro -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| u16 SaveRState; |
| u16 SaveTState; |
| /* Extern variables ----------------------------------------------------------*/ |
| extern void (*pEpInt_IN[15])(void); /* Handles IN interrupts */ |
| extern void (*pEpInt_OUT[15])(void); /* Handles OUT interrupts */ |
| /* Private function prototypes -----------------------------------------------*/ |
| /* Private functions ---------------------------------------------------------*/ |
| |
| /******************************************************************************* |
| * Function Name : CTR_LP. |
| * Description : Low priority Endpoint Correct Transfer interrupt's service |
| * routine. |
| * Input : None. |
| * Output : None. |
| * Return : None. |
| *******************************************************************************/ |
| void CTR_LP(void) |
| { |
| u32 wEPVal = 0; |
| /* stay in loop while pending ints */ |
| while (((wIstr = _GetISTR()) & ISTR_CTR) != 0) |
| { |
| _SetISTR((u16)CLR_CTR); /* clear CTR flag */ |
| /* extract highest priority endpoint number */ |
| EPindex = (u8)(wIstr & ISTR_EP_ID); |
| if (EPindex == 0) |
| { |
| /* Decode and service control endpoint interrupt */ |
| /* calling related service routine */ |
| /* (Setup0_Process, In0_Process, Out0_Process) */ |
| |
| /* save RX & TX status */ |
| /* and set both to NAK */ |
| SaveRState = _GetEPRxStatus(ENDP0); |
| SaveTState = _GetEPTxStatus(ENDP0); |
| _SetEPRxStatus(ENDP0, EP_RX_NAK); |
| _SetEPTxStatus(ENDP0, EP_TX_NAK); |
| |
| |
| /* DIR bit = origin of the interrupt */ |
| |
| if ((wIstr & ISTR_DIR) == 0) |
| { |
| /* DIR = 0 */ |
| |
| /* DIR = 0 => IN int */ |
| /* DIR = 0 implies that (EP_CTR_TX = 1) always */ |
| |
| |
| _ClearEP_CTR_TX(ENDP0); |
| In0_Process(); |
| |
| /* before terminate set Tx & Rx status */ |
| _SetEPRxStatus(ENDP0, SaveRState); |
| _SetEPTxStatus(ENDP0, SaveTState); |
| return; |
| } |
| else |
| { |
| /* DIR = 1 */ |
| |
| /* DIR = 1 & CTR_RX => SETUP or OUT int */ |
| /* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */ |
| |
| wEPVal = _GetENDPOINT(ENDP0); |
| if ((wEPVal & EP_CTR_TX) != 0) |
| { |
| _ClearEP_CTR_TX(ENDP0); |
| In0_Process(); |
| /* before terminate set Tx & Rx status */ |
| _SetEPRxStatus(ENDP0, SaveRState); |
| _SetEPTxStatus(ENDP0, SaveTState); |
| return; |
| } |
| else if ((wEPVal &EP_SETUP) != 0) |
| { |
| _ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */ |
| Setup0_Process(); |
| /* before terminate set Tx & Rx status */ |
| _SetEPRxStatus(ENDP0, SaveRState); |
| _SetEPTxStatus(ENDP0, SaveTState); |
| return; |
| } |
| |
| else if ((wEPVal & EP_CTR_RX) != 0) |
| { |
| _ClearEP_CTR_RX(ENDP0); |
| Out0_Process(); |
| /* before terminate set Tx & Rx status */ |
| _SetEPRxStatus(ENDP0, SaveRState); |
| _SetEPTxStatus(ENDP0, SaveTState); |
| return; |
| } |
| } |
| }/* if(EPindex == 0) */ |
| else |
| { |
| /* Decode and service non control endpoints interrupt */ |
| |
| /* process related endpoint register */ |
| wEPVal = _GetENDPOINT(EPindex); |
| if ((wEPVal & EP_CTR_RX) != 0) |
| { |
| /* clear int flag */ |
| _ClearEP_CTR_RX(EPindex); |
| |
| /* call OUT service function */ |
| (*pEpInt_OUT[EPindex-1])(); |
| |
| } /* if((wEPVal & EP_CTR_RX) */ |
| |
| if ((wEPVal & EP_CTR_TX) != 0) |
| { |
| /* clear int flag */ |
| _ClearEP_CTR_TX(EPindex); |
| |
| /* call IN service function */ |
| (*pEpInt_IN[EPindex-1])(); |
| } /* if((wEPVal & EP_CTR_TX) != 0) */ |
| |
| }/* if(EPindex == 0) else */ |
| |
| }/* while(...) */ |
| } |
| |
| /******************************************************************************* |
| * Function Name : CTR_HP. |
| * Description : High Priority Endpoint Correct Transfer interrupt's service |
| * routine. |
| * Input : None. |
| * Output : None. |
| * Return : None. |
| *******************************************************************************/ |
| void CTR_HP(void) |
| { |
| u32 wEPVal; |
| |
| while (((wIstr = _GetISTR()) & ISTR_CTR) != 0) |
| { |
| _SetISTR((u16)CLR_CTR); /* clear CTR flag */ |
| /* extract highest priority endpoint number */ |
| EPindex = (u8)(wIstr & ISTR_EP_ID); |
| /* process related endpoint register */ |
| wEPVal = _GetENDPOINT(EPindex); |
| if ((wEPVal & EP_CTR_RX) != 0) |
| { |
| /* clear int flag */ |
| _ClearEP_CTR_RX(EPindex); |
| |
| /* call OUT service function */ |
| (*pEpInt_OUT[EPindex-1])(); |
| |
| } /* if((wEPVal & EP_CTR_RX) */ |
| if ((wEPVal & EP_CTR_TX) != 0) |
| { |
| /* clear int flag */ |
| _ClearEP_CTR_TX(EPindex); |
| |
| /* call IN service function */ |
| (*pEpInt_IN[EPindex-1])(); |
| |
| |
| } /* if((wEPVal & EP_CTR_TX) != 0) */ |
| |
| }/* while(...) */ |
| } /* CTR_HP */ |
| |
| /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ |
| |