diff options
Diffstat (limited to 'libmaple/usb/usb_lib/usb_int.c')
| -rw-r--r-- | libmaple/usb/usb_lib/usb_int.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/libmaple/usb/usb_lib/usb_int.c b/libmaple/usb/usb_lib/usb_int.c new file mode 100644 index 0000000..f1d82be --- /dev/null +++ b/libmaple/usb/usb_lib/usb_int.c @@ -0,0 +1,192 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : usb_int.c
+* Author : MCD Application Team
+* Version : V2.2.1
+* Date : 09/22/2008
+* 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 FIRMWARE 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[7])(void); /* Handles IN interrupts */
+extern void (*pEpInt_OUT[7])(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 = 0;
+
+ 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) */
+ else 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(...) */
+}
+
+/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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