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| 1 | ingob | 1 | /******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** |
| 2 | * File Name : usb_int.c |
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| 3 | * Author : MCD Application Team |
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| 4 | * Date First Issued : 10/27/2003 : V1.0 |
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| 5 | * Description : Endpoint CTR (Low and High) interrupt's service routines |
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| 6 | ******************************************************************************** |
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| 7 | * History: |
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| 8 | * 09/18/2006 : V3.0 |
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| 9 | * 09/01/2006 : V2.0 |
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| 10 | * 10/27/2003 : V1.0 |
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| 11 | ******************************************************************************** |
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| 12 | * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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| 13 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
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| 14 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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| 15 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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| 16 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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| 17 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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| 18 | *******************************************************************************/ |
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| 19 | |||
| 20 | /* Includes ------------------------------------------------------------------*/ |
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| 21 | #include "usb_lib.h" |
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| 22 | /* Private typedef -----------------------------------------------------------*/ |
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| 23 | /* Private define ------------------------------------------------------------*/ |
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| 24 | /* Private macro -------------------------------------------------------------*/ |
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| 25 | /* Private variables ---------------------------------------------------------*/ |
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| 26 | u16 SaveRState; |
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| 27 | u16 SaveTState; |
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| 28 | /* Extern variables ----------------------------------------------------------*/ |
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| 29 | extern void (*pEpInt_IN[15])(void); /* Handles IN interrupts */ |
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| 30 | extern void (*pEpInt_OUT[15])(void); /* Handles OUT interrupts */ |
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| 31 | /* Private function prototypes -----------------------------------------------*/ |
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| 32 | /* Private functions ---------------------------------------------------------*/ |
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| 33 | /******************************************************************************* |
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| 34 | * Function Name : CTR_LP |
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| 35 | * Description : Low Endpoint Correct Transfer interrupt's service routine |
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| 36 | * Input : None |
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| 37 | * Output : None |
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| 38 | * Return : None |
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| 39 | *******************************************************************************/ |
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| 40 | void CTR_LP(void) |
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| 41 | { |
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| 42 | u32 wEPVal; |
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| 43 | /* stay in loop while pending ints */ |
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| 44 | while(((wIstr = _GetISTR()) & ISTR_CTR)!= 0) |
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| 45 | { |
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| 46 | _SetISTR((u16)CLR_CTR); /* clear CTR flag */ |
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| 47 | /* extract highest priority endpoint number */ |
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| 48 | EPindex = (u8)(wIstr & ISTR_EP_ID); |
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| 49 | if(EPindex == 0) |
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| 50 | { |
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| 51 | /* Decode and service control endpoint interrupt */ |
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| 52 | /* calling related service routine */ |
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| 53 | /* (Setup0_Process, In0_Process, Out0_Process) */ |
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| 54 | |||
| 55 | /* save RX & TX status */ |
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| 56 | /* and set both to NAK */ |
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| 57 | SaveRState = _GetEPRxStatus(ENDP0); |
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| 58 | SaveTState = _GetEPTxStatus(ENDP0); |
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| 59 | _SetEPRxStatus(ENDP0, EP_RX_NAK); |
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| 60 | _SetEPTxStatus(ENDP0, EP_TX_NAK); |
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| 61 | |||
| 62 | |||
| 63 | /* DIR bit = origin of the interrupt */ |
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| 64 | |||
| 65 | if((wIstr & ISTR_DIR) == 0) |
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| 66 | {/* DIR = 0 */ |
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| 67 | |||
| 68 | /* DIR = 0 => IN int */ |
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| 69 | /* DIR = 0 implies that (EP_CTR_TX = 1) always */ |
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| 70 | |||
| 71 | |||
| 72 | _ClearEP_CTR_TX(ENDP0); |
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| 73 | In0_Process(); |
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| 74 | |||
| 75 | /* check if SETUP arrived during IN processing */ |
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| 76 | wEPVal = _GetENDPOINT(ENDP0); |
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| 77 | if((wEPVal & (EP_CTR_RX|EP_SETUP)) != 0) |
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| 78 | { |
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| 79 | _ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */ |
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| 80 | Setup0_Process(); |
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| 81 | } |
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| 82 | |||
| 83 | }/* DIR = 0 */ |
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| 84 | else |
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| 85 | {/* DIR = 1 */ |
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| 86 | |||
| 87 | |||
| 88 | /* DIR = 1 & CTR_RX => SETUP or OUT int */ |
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| 89 | /* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */ |
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| 90 | |||
| 91 | wEPVal = _GetENDPOINT(ENDP0); |
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| 92 | if((wEPVal & EP_CTR_TX) != 0) |
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| 93 | { |
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| 94 | _ClearEP_CTR_TX(ENDP0); |
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| 95 | In0_Process(); |
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| 96 | } |
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| 97 | if((wEPVal &EP_SETUP) != 0) |
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| 98 | { |
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| 99 | _ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */ |
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| 100 | Setup0_Process(); |
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| 101 | } |
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| 102 | |||
| 103 | else if((wEPVal & EP_CTR_RX) != 0) |
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| 104 | { |
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| 105 | _ClearEP_CTR_RX(ENDP0); |
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| 106 | Out0_Process(); |
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| 107 | } |
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| 108 | |||
| 109 | }/* DIR = 1 */ |
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| 110 | |||
| 111 | /* before terminate set Tx & Rx status */ |
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| 112 | _SetEPRxStatus(ENDP0, SaveRState); |
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| 113 | _SetEPTxStatus(ENDP0, SaveTState); |
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| 114 | }/* if(EPindex == 0) */ |
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| 115 | else |
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| 116 | { /* Decode and service non control endpoints interrupt */ |
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| 117 | |||
| 118 | /* process related endpoint register */ |
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| 119 | wEPVal = _GetENDPOINT(EPindex); |
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| 120 | if((wEPVal & EP_CTR_RX) != 0) |
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| 121 | { |
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| 122 | /* clear int flag */ |
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| 123 | _ClearEP_CTR_RX(EPindex); |
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| 124 | |||
| 125 | /* call OUT service function */ |
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| 126 | (*pEpInt_OUT[EPindex-1])(); |
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| 127 | |||
| 128 | } /* if((wEPVal & EP_CTR_RX) */ |
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| 129 | if((wEPVal & EP_CTR_TX) != 0) |
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| 130 | { |
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| 131 | /* clear int flag */ |
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| 132 | _ClearEP_CTR_TX(EPindex); |
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| 133 | |||
| 134 | /* call IN service function */ |
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| 135 | (*pEpInt_IN[EPindex-1])(); |
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| 136 | |||
| 137 | |||
| 138 | } /* if((wEPVal & EP_CTR_TX) != 0) */ |
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| 139 | |||
| 140 | |||
| 141 | }/* if(EPindex == 0) else */ |
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| 142 | |||
| 143 | }/* while(...) */ |
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| 144 | } /* CTR_LP */ |
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| 145 | |||
| 146 | |||
| 147 | /******************************************************************************* |
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| 148 | * Function Name : CTR_HP |
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| 149 | * Description : High Endpoint Correct Transfer interrupt's service routine |
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| 150 | * Input : None |
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| 151 | * Output : None |
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| 152 | * Return : None |
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| 153 | *******************************************************************************/ |
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| 154 | void CTR_HP(void) |
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| 155 | { |
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| 156 | u32 wEPVal; |
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| 157 | |||
| 158 | while(((wIstr = _GetISTR()) & ISTR_CTR)!= 0) |
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| 159 | { |
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| 160 | _SetISTR((u16)CLR_CTR); /* clear CTR flag */ |
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| 161 | /* extract highest priority endpoint number */ |
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| 162 | EPindex = (u8)(wIstr & ISTR_EP_ID); |
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| 163 | /* process related endpoint register */ |
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| 164 | wEPVal = _GetENDPOINT(EPindex); |
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| 165 | if((wEPVal & EP_CTR_RX) != 0) |
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| 166 | { |
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| 167 | /* clear int flag */ |
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| 168 | _ClearEP_CTR_RX(EPindex); |
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| 169 | |||
| 170 | /* call OUT service function */ |
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| 171 | (*pEpInt_OUT[EPindex-1])(); |
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| 172 | |||
| 173 | } /* if((wEPVal & EP_CTR_RX) */ |
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| 174 | if((wEPVal & EP_CTR_TX) != 0) |
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| 175 | { |
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| 176 | /* clear int flag */ |
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| 177 | _ClearEP_CTR_TX(EPindex); |
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| 178 | |||
| 179 | /* call IN service function */ |
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| 180 | (*pEpInt_IN[EPindex-1])(); |
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| 181 | |||
| 182 | |||
| 183 | } /* if((wEPVal & EP_CTR_TX) != 0) */ |
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| 184 | |||
| 185 | }/* while(...) */ |
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| 186 | } /* CTR_HP */ |
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| 187 | |||
| 188 | /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/ |
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| 189 |