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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 196 | killagreg | 1 | /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** |
| 1 | ingob | 2 | * File Name : usb_int.c |
| 3 | * Author : MCD Application Team |
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| 196 | killagreg | 4 | * Version : V4.0.0 |
| 5 | * Date : 09/29/2008 |
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| 6 | * Description : Endpoint CTR (Low and High) interrupt's service routines. |
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| 1 | ingob | 7 | ******************************************************************************** |
| 196 | killagreg | 8 | * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
| 1 | ingob | 9 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
| 10 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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| 11 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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| 12 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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| 13 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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| 14 | *******************************************************************************/ |
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| 15 | |||
| 16 | /* Includes ------------------------------------------------------------------*/ |
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| 17 | #include "usb_lib.h" |
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| 18 | /* Private typedef -----------------------------------------------------------*/ |
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| 19 | /* Private define ------------------------------------------------------------*/ |
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| 20 | /* Private macro -------------------------------------------------------------*/ |
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| 21 | /* Private variables ---------------------------------------------------------*/ |
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| 22 | u16 SaveRState; |
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| 23 | u16 SaveTState; |
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| 24 | /* Extern variables ----------------------------------------------------------*/ |
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| 25 | extern void (*pEpInt_IN[15])(void); /* Handles IN interrupts */ |
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| 26 | extern void (*pEpInt_OUT[15])(void); /* Handles OUT interrupts */ |
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| 27 | /* Private function prototypes -----------------------------------------------*/ |
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| 28 | /* Private functions ---------------------------------------------------------*/ |
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| 196 | killagreg | 29 | |
| 1 | ingob | 30 | /******************************************************************************* |
| 196 | killagreg | 31 | * Function Name : CTR_LP. |
| 32 | * Description : Low priority Endpoint Correct Transfer interrupt's service |
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| 33 | * routine. |
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| 34 | * Input : None. |
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| 35 | * Output : None. |
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| 36 | * Return : None. |
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| 1 | ingob | 37 | *******************************************************************************/ |
| 38 | void CTR_LP(void) |
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| 39 | { |
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| 196 | killagreg | 40 | u32 wEPVal = 0; |
| 41 | /* stay in loop while pending ints */ |
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| 42 | while (((wIstr = _GetISTR()) & ISTR_CTR) != 0) |
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| 43 | { |
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| 44 | _SetISTR((u16)CLR_CTR); /* clear CTR flag */ |
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| 45 | /* extract highest priority endpoint number */ |
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| 46 | EPindex = (u8)(wIstr & ISTR_EP_ID); |
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| 47 | if (EPindex == 0) |
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| 48 | { |
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| 49 | /* Decode and service control endpoint interrupt */ |
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| 50 | /* calling related service routine */ |
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| 51 | /* (Setup0_Process, In0_Process, Out0_Process) */ |
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| 1 | ingob | 52 | |
| 196 | killagreg | 53 | /* save RX & TX status */ |
| 54 | /* and set both to NAK */ |
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| 55 | SaveRState = _GetEPRxStatus(ENDP0); |
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| 56 | SaveTState = _GetEPTxStatus(ENDP0); |
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| 57 | _SetEPRxStatus(ENDP0, EP_RX_NAK); |
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| 58 | _SetEPTxStatus(ENDP0, EP_TX_NAK); |
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| 1 | ingob | 59 | |
| 60 | |||
| 196 | killagreg | 61 | /* DIR bit = origin of the interrupt */ |
| 1 | ingob | 62 | |
| 196 | killagreg | 63 | if ((wIstr & ISTR_DIR) == 0) |
| 64 | { |
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| 65 | /* DIR = 0 */ |
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| 1 | ingob | 66 | |
| 196 | killagreg | 67 | /* DIR = 0 => IN int */ |
| 68 | /* DIR = 0 implies that (EP_CTR_TX = 1) always */ |
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| 1 | ingob | 69 | |
| 70 | |||
| 196 | killagreg | 71 | _ClearEP_CTR_TX(ENDP0); |
| 72 | In0_Process(); |
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| 1 | ingob | 73 | |
| 196 | killagreg | 74 | /* before terminate set Tx & Rx status */ |
| 75 | _SetEPRxStatus(ENDP0, SaveRState); |
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| 76 | _SetEPTxStatus(ENDP0, SaveTState); |
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| 77 | return; |
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| 78 | } |
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| 79 | else |
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| 80 | { |
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| 81 | /* DIR = 1 */ |
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| 1 | ingob | 82 | |
| 196 | killagreg | 83 | /* DIR = 1 & CTR_RX => SETUP or OUT int */ |
| 84 | /* DIR = 1 & (CTR_TX | CTR_RX) => 2 int pending */ |
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| 1 | ingob | 85 | |
| 196 | killagreg | 86 | wEPVal = _GetENDPOINT(ENDP0); |
| 87 | if ((wEPVal & EP_CTR_TX) != 0) |
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| 88 | { |
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| 89 | _ClearEP_CTR_TX(ENDP0); |
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| 90 | In0_Process(); |
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| 91 | /* before terminate set Tx & Rx status */ |
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| 92 | _SetEPRxStatus(ENDP0, SaveRState); |
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| 93 | _SetEPTxStatus(ENDP0, SaveTState); |
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| 94 | return; |
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| 95 | } |
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| 96 | else if ((wEPVal &EP_SETUP) != 0) |
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| 97 | { |
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| 98 | _ClearEP_CTR_RX(ENDP0); /* SETUP bit kept frozen while CTR_RX = 1 */ |
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| 99 | Setup0_Process(); |
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| 100 | /* before terminate set Tx & Rx status */ |
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| 101 | _SetEPRxStatus(ENDP0, SaveRState); |
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| 102 | _SetEPTxStatus(ENDP0, SaveTState); |
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| 103 | return; |
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| 104 | } |
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| 1 | ingob | 105 | |
| 196 | killagreg | 106 | else if ((wEPVal & EP_CTR_RX) != 0) |
| 107 | { |
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| 108 | _ClearEP_CTR_RX(ENDP0); |
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| 109 | Out0_Process(); |
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| 110 | /* before terminate set Tx & Rx status */ |
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| 111 | _SetEPRxStatus(ENDP0, SaveRState); |
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| 112 | _SetEPTxStatus(ENDP0, SaveTState); |
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| 113 | return; |
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| 114 | } |
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| 115 | } |
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| 116 | }/* if(EPindex == 0) */ |
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| 117 | else |
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| 118 | { |
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| 119 | /* Decode and service non control endpoints interrupt */ |
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| 1 | ingob | 120 | |
| 196 | killagreg | 121 | /* process related endpoint register */ |
| 122 | wEPVal = _GetENDPOINT(EPindex); |
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| 123 | if ((wEPVal & EP_CTR_RX) != 0) |
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| 124 | { |
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| 125 | /* clear int flag */ |
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| 126 | _ClearEP_CTR_RX(EPindex); |
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| 1 | ingob | 127 | |
| 196 | killagreg | 128 | /* call OUT service function */ |
| 129 | (*pEpInt_OUT[EPindex-1])(); |
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| 1 | ingob | 130 | |
| 196 | killagreg | 131 | } /* if((wEPVal & EP_CTR_RX) */ |
| 1 | ingob | 132 | |
| 196 | killagreg | 133 | if ((wEPVal & EP_CTR_TX) != 0) |
| 134 | { |
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| 135 | /* clear int flag */ |
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| 136 | _ClearEP_CTR_TX(EPindex); |
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| 137 | |||
| 138 | /* call IN service function */ |
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| 139 | (*pEpInt_IN[EPindex-1])(); |
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| 140 | } /* if((wEPVal & EP_CTR_TX) != 0) */ |
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| 141 | |||
| 142 | }/* if(EPindex == 0) else */ |
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| 143 | |||
| 144 | }/* while(...) */ |
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| 145 | } |
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| 146 | |||
| 1 | ingob | 147 | /******************************************************************************* |
| 196 | killagreg | 148 | * Function Name : CTR_HP. |
| 149 | * Description : High Priority Endpoint Correct Transfer interrupt's service |
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| 150 | * routine. |
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| 151 | * Input : None. |
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| 152 | * Output : None. |
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| 153 | * Return : None. |
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| 1 | ingob | 154 | *******************************************************************************/ |
| 155 | void CTR_HP(void) |
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| 156 | { |
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| 196 | killagreg | 157 | u32 wEPVal; |
| 1 | ingob | 158 | |
| 196 | killagreg | 159 | while (((wIstr = _GetISTR()) & ISTR_CTR) != 0) |
| 160 | { |
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| 161 | _SetISTR((u16)CLR_CTR); /* clear CTR flag */ |
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| 162 | /* extract highest priority endpoint number */ |
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| 163 | EPindex = (u8)(wIstr & ISTR_EP_ID); |
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| 164 | /* process related endpoint register */ |
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| 165 | wEPVal = _GetENDPOINT(EPindex); |
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| 166 | if ((wEPVal & EP_CTR_RX) != 0) |
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| 167 | { |
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| 168 | /* clear int flag */ |
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| 169 | _ClearEP_CTR_RX(EPindex); |
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| 1 | ingob | 170 | |
| 196 | killagreg | 171 | /* call OUT service function */ |
| 172 | (*pEpInt_OUT[EPindex-1])(); |
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| 173 | |||
| 174 | } /* if((wEPVal & EP_CTR_RX) */ |
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| 175 | if ((wEPVal & EP_CTR_TX) != 0) |
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| 176 | { |
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| 177 | /* clear int flag */ |
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| 178 | _ClearEP_CTR_TX(EPindex); |
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| 179 | |||
| 180 | /* call IN service function */ |
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| 181 | (*pEpInt_IN[EPindex-1])(); |
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| 182 | |||
| 183 | |||
| 184 | } /* if((wEPVal & EP_CTR_TX) != 0) */ |
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| 185 | |||
| 186 | }/* while(...) */ |
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| 1 | ingob | 187 | } /* CTR_HP */ |
| 188 | |||
| 196 | killagreg | 189 | /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ |
| 1 | ingob | 190 |