diff options
Diffstat (limited to 'uc_str912/prj_blinky_complex_startup/src/usb_int.c')
| -rw-r--r-- | uc_str912/prj_blinky_complex_startup/src/usb_int.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/uc_str912/prj_blinky_complex_startup/src/usb_int.c b/uc_str912/prj_blinky_complex_startup/src/usb_int.c new file mode 100644 index 0000000..28c956b --- /dev/null +++ b/uc_str912/prj_blinky_complex_startup/src/usb_int.c @@ -0,0 +1,95 @@ +/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
+* File Name : usb_int.c
+* Author : MCD Application Team
+* Date First Issued : 05/18/2006 : Version 1.0
+* Description : Endpoint CTR interrupt service routine
+********************************************************************************
+* History:
+* 05/24/2006 : Version 1.1
+* 05/18/2006 : Version 1.0
+********************************************************************************
+* THE PRESENT SOFTWARE 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.
+*******************************************************************************/
+#include "USB_lib.h"
+extern void (*pEpInt[9])(void);
+
+void CTR_ISR()
+{
+ WORD wEPVal;
+ /* stay in loop while pending ints */
+ while(((wIstr = _GetISTR()) & ISTR_CTR)!= 0)
+ {
+ _SetISTR((WORD)CLR_CTR); /* clear CTR flag */
+ /* extract highest priority endpoint number */
+ EPindex = (BYTE)(wIstr & ISTR_EP_ID);
+ if(EPindex == 0) /* Decode and service control endpoint interrupt */
+ {
+ /* 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);
+ if((wIstr & ISTR_DIR) == 0)
+ {
+ /* DIR = 0 => IN int */
+ _ClearEP_CTR_TX(ENDP0);
+ In0_Process();
+ /* check if SETUP arrived during IN processing */
+ wEPVal = _GetENDPOINT(ENDP0);
+ if((wEPVal & (EP_CTR_RX|EP_SETUP)) != 0)
+ {
+ _ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */
+ Setup0_Process();
+ }
+ }
+ else
+ {
+ /* 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();
+ }
+ if((wEPVal &EP_SETUP) != 0)
+ {
+ _ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */
+ Setup0_Process();
+ }
+ 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);
+ }
+ 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);
+ }
+ if((wEPVal & EP_CTR_TX) != 0)
+ {
+ /* clear int flag */
+ _ClearEP_CTR_TX(EPindex);
+ }
+ /* call service function */
+ (*pEpInt[EPindex-1])();
+ }
+ }
+} /* CTR_ISR */
+
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