diff options
Diffstat (limited to 'libmaple/usb/usb.c')
| -rw-r--r-- | libmaple/usb/usb.c | 272 |
1 files changed, 118 insertions, 154 deletions
diff --git a/libmaple/usb/usb.c b/libmaple/usb/usb.c index 026d7f0..d875785 100644 --- a/libmaple/usb/usb.c +++ b/libmaple/usb/usb.c @@ -1,30 +1,30 @@ -/* ***************************************************************************** +/****************************************************************************** * The MIT License * * Copyright (c) 2010 LeafLabs LLC. * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - * ****************************************************************************/ + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + *****************************************************************************/ /** - * @file usb.c - * * @brief usb-specific hardware setup, NVIC, clocks, and usb activities * in the pre-attached state. includes some of the lower level callbacks * needed by the usb library, like suspend,resume,init,etc @@ -47,87 +47,75 @@ volatile uint16 wIstr = 0; volatile bIntPackSOF = 0; DEVICE Device_Table = - { - NUM_ENDPTS, - 1 - }; + {NUM_ENDPTS, + 1}; DEVICE_PROP Device_Property = - { - usbInit, - usbReset, - usbStatusIn, - usbStatusOut, - usbDataSetup, - usbNoDataSetup, - usbGetInterfaceSetting, - usbGetDeviceDescriptor, - usbGetConfigDescriptor, - usbGetStringDescriptor, - 0, - bMaxPacketSize - }; + {usbInit, + usbReset, + usbStatusIn, + usbStatusOut, + usbDataSetup, + usbNoDataSetup, + usbGetInterfaceSetting, + usbGetDeviceDescriptor, + usbGetConfigDescriptor, + usbGetStringDescriptor, + 0, + bMaxPacketSize}; USER_STANDARD_REQUESTS User_Standard_Requests = - { - NOP_Process, - usbSetConfiguration, - NOP_Process, - NOP_Process, - NOP_Process, - NOP_Process, - NOP_Process, - NOP_Process, - usbSetDeviceAddress - }; + {NOP_Process, + usbSetConfiguration, + NOP_Process, + NOP_Process, + NOP_Process, + NOP_Process, + NOP_Process, + NOP_Process, + usbSetDeviceAddress}; void (*pEpInt_IN[7])(void) = -{ - vcomDataTxCb, - vcomManagementCb, - NOP_Process, - NOP_Process, - NOP_Process, - NOP_Process, - NOP_Process, -}; + {vcomDataTxCb, + vcomManagementCb, + NOP_Process, + NOP_Process, + NOP_Process, + NOP_Process, + NOP_Process}; void (*pEpInt_OUT[7])(void) = -{ - NOP_Process, - NOP_Process, - vcomDataRxCb, - NOP_Process, - NOP_Process, - NOP_Process, - NOP_Process, -}; - -struct -{ + {NOP_Process, + NOP_Process, + vcomDataRxCb, + NOP_Process, + NOP_Process, + NOP_Process, + NOP_Process}; + +struct { volatile RESUME_STATE eState; volatile uint8 bESOFcnt; } ResumeS; void setupUSB (void) { gpio_set_mode(USB_DISC_BANK, - USB_DISC_PIN, - GPIO_MODE_OUTPUT_PP); + USB_DISC_PIN, + GPIO_MODE_OUTPUT_PP); /* setup the apb1 clock for USB */ pRCC->APB1ENR |= 0x00800000; /* initialize the usb application */ - gpio_write_bit(USB_DISC_BANK, USB_DISC_PIN, 0); /* present ourselves to the host */ - - USB_Init(); /* low level init routine provided by st lib */ + gpio_write_bit(USB_DISC_BANK, USB_DISC_PIN, 0); // presents us to the host + USB_Init(); // low level init routine provided by the ST library } void disableUSB (void) { // These are just guesses about how to do this // TODO: real disable function usbDsbISR(); - gpio_write_bit(USB_DISC_BANK,USB_DISC_PIN,1); + gpio_write_bit(USB_DISC_BANK,USB_DISC_PIN,1); } void usbSuspend(void) { @@ -188,13 +176,12 @@ void usbResume(RESUME_STATE eResumeSetVal) { break; case RESUME_ON: ResumeS.bESOFcnt--; - if (ResumeS.bESOFcnt == 0) - { - wCNTR = _GetCNTR(); - wCNTR &= (~CNTR_RESUME); - _SetCNTR(wCNTR); - ResumeS.eState = RESUME_OFF; - } + if (ResumeS.bESOFcnt == 0) { + wCNTR = _GetCNTR(); + wCNTR &= (~CNTR_RESUME); + _SetCNTR(wCNTR); + ResumeS.eState = RESUME_OFF; + } break; case RESUME_OFF: case RESUME_ESOF: @@ -213,7 +200,7 @@ RESULT usbPowerOn(void) { wInterrupt_Mask = 0; _SetCNTR(wInterrupt_Mask); _SetISTR(0); - wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM; /* the bare minimum */ + wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM; // the bare minimum _SetCNTR(wInterrupt_Mask); return USB_SUCCESS; @@ -284,60 +271,51 @@ if (wIstr & ISTR_ERR & wInterrupt_Mask) #if (ISR_MSK & ISTR_WKUP) -if (wIstr & ISTR_WKUP & wInterrupt_Mask) - { +if (wIstr & ISTR_WKUP & wInterrupt_Mask) { _SetISTR((u16)CLR_WKUP); usbResume(RESUME_EXTERNAL); - } +} #endif /*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/ #if (ISR_MSK & ISTR_SUSP) -if (wIstr & ISTR_SUSP & wInterrupt_Mask) - { - +if (wIstr & ISTR_SUSP & wInterrupt_Mask) { /* check if SUSPEND is possible */ - if (F_SUSPEND_ENABLED) - { - usbSuspend(); - } - else - { - /* if not possible then resume after xx ms */ - usbResume(RESUME_LATER); - } + if (F_SUSPEND_ENABLED) { + usbSuspend(); + } else { + /* if not possible then resume after xx ms */ + usbResume(RESUME_LATER); + } /* clear of the ISTR bit must be done after setting of CNTR_FSUSP */ _SetISTR((u16)CLR_SUSP); - } +} #endif #if (ISR_MSK & ISTR_SOF) -if (wIstr & ISTR_SOF & wInterrupt_Mask) - { +if (wIstr & ISTR_SOF & wInterrupt_Mask) { _SetISTR((u16)CLR_SOF); bIntPackSOF++; - } + } #endif #if (ISR_MSK & ISTR_ESOF) -if (wIstr & ISTR_ESOF & wInterrupt_Mask) - { +if (wIstr & ISTR_ESOF & wInterrupt_Mask) { _SetISTR((u16)CLR_ESOF); /* resume handling timing is made with ESOFs */ usbResume(RESUME_ESOF); /* request without change of the machine state */ - } + } #endif /*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/ #if (ISR_MSK & ISTR_CTR) -if (wIstr & ISTR_CTR & wInterrupt_Mask) - { +if (wIstr & ISTR_CTR & wInterrupt_Mask) { /* servicing of the endpoint correct transfer interrupt */ /* clear of the CTR flag into the sub */ CTR_LP(); /* low priority ISR defined in the usb core lib */ - } + } #endif } @@ -349,87 +327,73 @@ void usbWaitReset(void) { /* This low-level send bytes function is NON-BLOCKING; blocking behavior, with * a timeout, is implemented in usercode (or in the Wirish C++ high level - * implementation). + * implementation). * * This function will quickly copy up to 64 bytes of data (out of an * arbitrarily large buffer) into the USB peripheral TX buffer and return the * number placed in that buffer. It is up to usercode to divide larger packets - * into 64-byte chunks to guarantee delivery. Use usbGetCountTx() to determine - * whether the bytes were ACTUALLY recieved by the host or just transfered to - * the buffer. + * into 64-byte chunks to guarantee delivery. * - * The function will return -1 if it doesn't think that the USB host is - * "connected", but it can't detect this state robustly. "Connected" in this - * context means that an actual program on the Host operating system is - * connected to the virtual COM/ttyACM device and is recieving the bytes; the - * Host operating system is almost always configured and keeping this endpoint - * alive, but the bytes never get read out of the endpoint buffer. * - * The behavior of this function is subtle and frustrating; it has gone through - * many simpler and cleaner implementation that frustratingly don't work cross - * platform. - * - * */ -uint16 usbSendBytes(uint8* sendBuf, uint16 len) { - - uint16 loaded = 0; - - if (bDeviceState != CONFIGURED || (!usbGetDTR() && !usbGetRTS())) { - // Indicates to caller to stop trying, were not configured/connected - // The DTR and RTS lines are handled differently on major platforms, so - // the above logic is unreliable - return 0; - } + */ +void usbBlockingSendByte(char ch) { + while (countTx); + UserToPMABufferCopy(&ch,VCOM_TX_ADDR,1); + _SetEPTxCount(VCOM_TX_ENDP,1); + _SetEPTxValid(VCOM_TX_ENDP); + countTx = 1; + while (countTx); +} +uint32 usbSendBytes(uint8* sendBuf, uint32 len) { + /* any checks on connection (via dtr/rts) done upstream in wirish or + by user */ - // Due to a variety of shit this is how we roll; all buffering etc is pushed - // upstream - if (countTx) { - return 0; + /* last xmit hasnt finished, abort */ + if (countTx) { + return 0; } // We can only put VCOM_TX_EPSIZE bytes in the buffer - if(len > VCOM_TX_EPSIZE) { - loaded = VCOM_TX_EPSIZE; - } else { - loaded = len; + if(len > VCOM_TX_EPSIZE/2) { + len = VCOM_TX_EPSIZE/2; } // Try to load some bytes if we can - if (loaded) { - UserToPMABufferCopy(sendBuf,VCOM_TX_ADDR + countTx, loaded); - _SetEPTxCount(VCOM_TX_ENDP, countTx+loaded); + if (len) { + UserToPMABufferCopy(sendBuf,VCOM_TX_ADDR, len); + _SetEPTxCount(VCOM_TX_ENDP, len); + countTx += len; _SetEPTxValid(VCOM_TX_ENDP); - countTx += loaded; } - return loaded; + return len; } /* returns the number of available bytes are in the recv FIFO */ -uint8 usbBytesAvailable(void) { - return VCOM_RX_EPSIZE - maxNewBytes; +uint32 usbBytesAvailable(void) { + return newBytes; } /* copies len bytes from the local recieve FIFO (not usb packet buffer) into recvBuf and deq's the fifo. will only copy the minimum of len or the available bytes. returns the number of bytes copied */ -uint8 usbReceiveBytes(uint8* recvBuf, uint8 len) { - if (len > VCOM_RX_EPSIZE - maxNewBytes) { - len = VCOM_RX_EPSIZE - maxNewBytes; +uint32 usbReceiveBytes(uint8* recvBuf, uint32 len) { + if (len > newBytes) { + len = newBytes; } int i; for (i=0;i<len;i++) { - recvBuf[i] = (uint8)(vcomBufferRx[recvBufOut]); - recvBufOut = (recvBufOut + 1) % VCOM_RX_EPSIZE; + recvBuf[i] = (uint8)(vcomBufferRx[i]); } - maxNewBytes += len; + newBytes -= len; /* re-enable the rx endpoint which we had set to receive 0 bytes */ - if (maxNewBytes - len == 0) { - SetEPRxCount(VCOM_RX_ENDP,maxNewBytes); + if (newBytes == 0) { + SetEPRxCount(VCOM_RX_ENDP,VCOM_RX_EPSIZE); + SetEPRxStatus(VCOM_RX_ENDP,EP_RX_VALID); } return len; @@ -466,7 +430,7 @@ uint8 usbIsConfigured() { uint8 usbIsConnected() { return (bDeviceState != UNCONNECTED); -} +} uint16 usbGetPending() { return countTx; |