/** * @brief Default EP0 OUT callback. * @details This function is used by the low level driver as default handler * for EP0 OUT events. * * @param[in] usbp pointer to the @p USBDriver object * @param[in] ep endpoint number, always zero * * @notapi */ void _usb_ep0out(USBDriver *usbp, usbep_t ep) { (void)ep; switch (usbp->ep0state) { case USB_EP0_RX: /* Receive phase over, sending the zero sized status packet.*/ usbp->ep0state = USB_EP0_SENDING_STS; usbPrepareTransmit(usbp, 0, NULL, 0); chSysLockFromIsr(); usbStartTransmitI(usbp, 0); chSysUnlockFromIsr(); return; case USB_EP0_WAITING_STS: /* Status packet received, it must be zero sized, invoking the callback if defined.*/ if (usbGetReceiveTransactionSizeI(usbp, 0) != 0) break; if (usbp->ep0endcb != NULL) usbp->ep0endcb(usbp); usbp->ep0state = USB_EP0_WAITING_SETUP; return; default: ; } /* Error response, the state machine goes into an error state, the low level layer will have to reset it to USB_EP0_WAITING_SETUP after receiving a SETUP packet.*/ usb_lld_stall_in(usbp, 0); usb_lld_stall_out(usbp, 0); _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED); usbp->ep0state = USB_EP0_ERROR; }
void hid_transmit(USBDriver *usbp) { usbPrepareTransmit(usbp, HID_IN_EP_ADDRESS, (uint8_t *)&hid_in_data, sizeof (hid_in_data)); chSysLockFromISR(); usbStartTransmitI(usbp, HID_IN_EP_ADDRESS); palSetPadMode(GPIOD, 14, PAL_MODE_OUTPUT_PUSHPULL); palClearPad(GPIOD, 14); chSysUnlockFromISR(); }
/** * @brief Default EP0 IN callback. * @details This function is used by the low level driver as default handler * for EP0 IN events. * * @param[in] usbp pointer to the @p USBDriver object * @param[in] ep endpoint number, always zero * * @notapi */ void _usb_ep0in(USBDriver *usbp, usbep_t ep) { size_t max; (void)ep; switch (usbp->ep0state) { case USB_EP0_TX: max = (size_t)get_hword(&usbp->setup[6]); /* If the transmitted size is less than the requested size and it is a multiple of the maximum packet size then a zero size packet must be transmitted.*/ if ((usbp->ep0n < max) && ((usbp->ep0n % usbp->epc[0]->in_maxsize) == 0U)) { usbPrepareTransmit(usbp, 0, NULL, 0); osalSysLockFromISR(); (void) usbStartTransmitI(usbp, 0); osalSysUnlockFromISR(); usbp->ep0state = USB_EP0_WAITING_TX0; return; } /* Falls into, it is intentional.*/ case USB_EP0_WAITING_TX0: /* Transmit phase over, receiving the zero sized status packet.*/ usbp->ep0state = USB_EP0_WAITING_STS; #if (USB_EP0_STATUS_STAGE == USB_EP0_STATUS_STAGE_SW) usbPrepareReceive(usbp, 0, NULL, 0); osalSysLockFromISR(); (void) usbStartReceiveI(usbp, 0); osalSysUnlockFromISR(); #else usb_lld_end_setup(usbp, ep); #endif return; case USB_EP0_SENDING_STS: /* Status packet sent, invoking the callback if defined.*/ if (usbp->ep0endcb != NULL) { usbp->ep0endcb(usbp); } usbp->ep0state = USB_EP0_WAITING_SETUP; return; case USB_EP0_WAITING_SETUP: case USB_EP0_WAITING_STS: case USB_EP0_RX: /* All the above are invalid states in the IN phase.*/ osalDbgAssert(false, "EP0 state machine error"); /* Falling through is intentional.*/ case USB_EP0_ERROR: /* Error response, the state machine goes into an error state, the low level layer will have to reset it to USB_EP0_WAITING_SETUP after receiving a SETUP packet.*/ usb_lld_stall_in(usbp, 0); usb_lld_stall_out(usbp, 0); _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED); usbp->ep0state = USB_EP0_ERROR; return; default: osalDbgAssert(false, "EP0 state machine invalid state"); } }
static msg_t tUsbTx(void *arg) { (void)arg; chRegSetThreadName("usbTx"); msg_t msg; usbPacket *usbBufp; enum {UsbTxComleteID = 0, UsbResetID = 1, UsbConfiguredID = 2}; EventListener elUsbTxComplete; EventListener elUsbReset; EventListener elUsbConfigured; eventmask_t activeEvents; chEvtRegister(&esUsbTxComplete, &elUsbTxComplete, UsbTxComleteID); chEvtRegister(&esUsbReset, &elUsbReset, UsbResetID); chEvtRegister(&esUsbConfigured, &elUsbConfigured, UsbConfiguredID); // Wait for the USB system to be configured. and clear all other event flags. chEvtWaitOne(EVENT_MASK(UsbConfiguredID)); chEvtGetAndClearEvents(EVENT_MASK(UsbTxComleteID) | EVENT_MASK(UsbResetID)); while (TRUE) { chMBFetch (&usbTXMailbox, &msg, TIME_INFINITE); // Check if USB has been reconfigured while waiting for message from sysctrl activeEvents = chEvtGetAndClearEvents(EVENT_MASK(UsbConfiguredID)); if (activeEvents == EVENT_MASK(UsbConfiguredID)) { // If so, clear the reset event since it is no longer relevant. activeEvents = chEvtGetAndClearEvents(EVENT_MASK(UsbResetID)); } // Typecast Mailbox message to command package pointer for readability usbBufp = (usbPacket*)msg; // Prepare transmit and start the transmission. This operation will return immediately usbPrepareTransmit(usbp, EP_IN, usbBufp->packet, (size_t)usbBufp->size); chSysLock(); usbStartTransmitI(usbp, EP_IN); chSysUnlock(); //Check for events from the USB system. activeEvents = chEvtWaitAny(EVENT_MASK(UsbTxComleteID) | EVENT_MASK(UsbResetID)); if (activeEvents == EVENT_MASK(UsbResetID)) { chEvtWaitOne(EVENT_MASK(UsbConfiguredID)); // Clear any events that has occurred while the usb was not configured. chEvtGetAndClearEvents(EVENT_MASK(UsbTxComleteID) | EVENT_MASK(UsbResetID)); } usbFreeMailboxBuffer (usbBufp); } return 0; }
void send_data(){ usbStatus=1; if(initUSB){ usbPrepareTransmit(usbp, EP_IN, transferBuf, sizeof transferBuf); chSysLock(); usbStartTransmitI(usbp, EP_IN); chSysUnlock(); /* chSequentialStreamWrite(&SDU1, buf, sizeof buf - 1); */ } initUSB=0; // else failed }
/** * @brief Default EP0 OUT callback. * @details This function is used by the low level driver as default handler * for EP0 OUT events. * * @param[in] usbp pointer to the @p USBDriver object * @param[in] ep endpoint number, always zero * * @notapi */ void _usb_ep0out(USBDriver *usbp, usbep_t ep) { (void)ep; switch (usbp->ep0state) { case USB_EP0_RX: /* Receive phase over, sending the zero sized status packet.*/ usbp->ep0state = USB_EP0_SENDING_STS; #if (USB_EP0_STATUS_STAGE == USB_EP0_STATUS_STAGE_SW) usbPrepareTransmit(usbp, 0, NULL, 0); osalSysLockFromISR(); (void) usbStartTransmitI(usbp, 0); osalSysUnlockFromISR(); #else usb_lld_end_setup(usbp, ep); #endif return; case USB_EP0_WAITING_STS: /* Status packet received, it must be zero sized, invoking the callback if defined.*/ #if (USB_EP0_STATUS_STAGE == USB_EP0_STATUS_STAGE_SW) if (usbGetReceiveTransactionSizeI(usbp, 0) != 0U) { break; } #endif if (usbp->ep0endcb != NULL) { usbp->ep0endcb(usbp); } usbp->ep0state = USB_EP0_WAITING_SETUP; return; case USB_EP0_WAITING_SETUP: case USB_EP0_TX: case USB_EP0_WAITING_TX0: case USB_EP0_SENDING_STS: /* All the above are invalid states in the IN phase.*/ osalDbgAssert(false, "EP0 state machine error"); /* Falling through is intentional.*/ case USB_EP0_ERROR: /* Error response, the state machine goes into an error state, the low level layer will have to reset it to USB_EP0_WAITING_SETUP after receiving a SETUP packet.*/ usb_lld_stall_in(usbp, 0); usb_lld_stall_out(usbp, 0); _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED); usbp->ep0state = USB_EP0_ERROR; return; default: osalDbgAssert(false, "EP0 state machine invalid state"); } }
/* * data Transmitted Callback */ void dataTransmitted(USBDriver *usbp, usbep_t ep){ (void) usbp; (void) ep; // exit on USB reset if(!usbStatus) return; usbPrepareTransmit(usbp, EP_IN, transferBuf, sizeof transferBuf); chSysLockFromIsr(); usbStartTransmitI(usbp, EP_IN); chSysUnlockFromIsr(); }
/** * @brief Default EP0 IN callback. * @details This function is used by the low level driver as default handler * for EP0 IN events. * * @param[in] usbp pointer to the @p USBDriver object * @param[in] ep endpoint number, always zero * * @notapi */ void _usb_ep0in(USBDriver *usbp, usbep_t ep) { size_t max; (void)ep; switch (usbp->ep0state) { case USB_EP0_TX: max = usbFetchWord(&usbp->setup[6]); /* If the transmitted size is less than the requested size and it is a multiple of the maximum packet size then a zero size packet must be transmitted.*/ if ((usbp->ep0n < max) && ((usbp->ep0n % usbp->epc[0]->in_maxsize) == 0)) { usbPrepareTransmit(usbp, 0, NULL, 0); chSysLockFromIsr(); usbStartTransmitI(usbp, 0); chSysUnlockFromIsr(); usbp->ep0state = USB_EP0_WAITING_TX0; return; } /* Falls into, it is intentional.*/ case USB_EP0_WAITING_TX0: /* Transmit phase over, receiving the zero sized status packet.*/ usbp->ep0state = USB_EP0_WAITING_STS; usbPrepareReceive(usbp, 0, NULL, 0); chSysLockFromIsr(); usbStartReceiveI(usbp, 0); chSysUnlockFromIsr(); return; case USB_EP0_SENDING_STS: /* Status packet sent, invoking the callback if defined.*/ if (usbp->ep0endcb != NULL) usbp->ep0endcb(usbp); usbp->ep0state = USB_EP0_WAITING_SETUP; return; default: ; } /* Error response, the state machine goes into an error state, the low level layer will have to reset it to USB_EP0_WAITING_SETUP after receiving a SETUP packet.*/ usb_lld_stall_in(usbp, 0); usb_lld_stall_out(usbp, 0); _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED); usbp->ep0state = USB_EP0_ERROR; }
static msg_t initUsbTransfer(void *arg) { (void)arg; uint8_t i; chRegSetThreadName("initUsbTransfer"); while (TRUE) { //wait until enough ADC data is aquired or an overflow is detected while((((p1+BUFFLEN-p2)%BUFFLEN)<IN_PACKETSIZE) && !overflow){ chThdSleepMilliseconds(1); } // copy the ADC data to the USB transfer buffer for (i=0;i<IN_PACKETSIZE;i++){ transferBuf[i]=((uint8_t*) data)[p2]; //if an overflow is detected, write the overflow count. // in a real application this has to be send on another channel if(overflow){ transferBuf[i]= overflow; overflow=0; } p2 = (p2+1)%BUFFLEN; } //wait for the last transmission to complete while(transmitting){ chThdSleepMilliseconds(1); } transmitting = 1; usbPrepareTransmit(usbp, EP_IN, transferBuf, IN_PACKETSIZE); chSysLock(); usbStartTransmitI(usbp, EP_IN); chSysUnlock(); } return 0; }
/* callback */ static void hid_debug_flush_cb(void *arg) { HIDDebugDriver *hiddp = (HIDDebugDriver *)arg; size_t i, n; uint8_t buf[DEBUG_TX_SIZE]; osalSysLockFromISR(); /* check that the states of things are as they're supposed to */ if((usbGetDriverStateI(hiddp->config->usbp) != USB_ACTIVE) || (hiddp->state != HIDDEBUG_READY)) { /* rearm the timer */ chVTSetI(&hid_debug_flush_timer, MS2ST(DEBUG_TX_FLUSH_MS), hid_debug_flush_cb, hiddp); osalSysUnlockFromISR(); return; } /* don't do anything if the queue or has enough stuff in it */ if(((n = oqGetFullI(&hiddp->oqueue)) == 0) || (n >= DEBUG_TX_SIZE)) { /* rearm the timer */ chVTSetI(&hid_debug_flush_timer, MS2ST(DEBUG_TX_FLUSH_MS), hid_debug_flush_cb, hiddp); osalSysUnlockFromISR(); return; } /* there's stuff hanging in the queue - so dequeue and send */ for(i = 0; i < n; i++) buf[i] = (uint8_t)oqGetI(&hiddp->oqueue); for(i = n; i < DEBUG_TX_SIZE; i++) buf[i] = 0; osalSysUnlockFromISR(); usbPrepareTransmit(hiddp->config->usbp, hiddp->config->ep_in, buf, DEBUG_TX_SIZE); osalSysLockFromISR(); (void)usbStartTransmitI(hiddp->config->usbp, hiddp->config->ep_in); /* rearm the timer */ chVTSetI(&hid_debug_flush_timer, MS2ST(DEBUG_TX_FLUSH_MS), hid_debug_flush_cb, hiddp); osalSysUnlockFromISR(); }
/** * @brief Default EP0 SETUP callback. * @details This function is used by the low level driver as default handler * for EP0 SETUP events. * * @param[in] usbp pointer to the @p USBDriver object * @param[in] ep endpoint number, always zero * * @notapi */ void _usb_ep0setup(USBDriver *usbp, usbep_t ep) { size_t max; usbp->ep0state = USB_EP0_WAITING_SETUP; usbReadSetup(usbp, ep, usbp->setup); /* First verify if the application has an handler installed for this request.*/ if (!(usbp->config->requests_hook_cb) || !(usbp->config->requests_hook_cb(usbp))) { /* Invoking the default handler, if this fails then stalls the endpoint zero as error.*/ if (((usbp->setup[0] & USB_RTYPE_TYPE_MASK) != USB_RTYPE_TYPE_STD) || !default_handler(usbp)) { /* Error response, the state machine goes into an error state, the low level layer will have to reset it to USB_EP0_WAITING_SETUP after receiving a SETUP packet.*/ usb_lld_stall_in(usbp, 0); usb_lld_stall_out(usbp, 0); _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED); usbp->ep0state = USB_EP0_ERROR; return; } } #if (USB_SET_ADDRESS_ACK_HANDLING == USB_SET_ADDRESS_ACK_HW) if (usbp->setup[1] == USB_REQ_SET_ADDRESS) { /* Zero-length packet sent by hardware */ return; } #endif /* Transfer preparation. The request handler must have populated correctly the fields ep0next, ep0n and ep0endcb using the macro usbSetupTransfer().*/ max = usbFetchWord(&usbp->setup[6]); /* The transfer size cannot exceed the specified amount.*/ if (usbp->ep0n > max) usbp->ep0n = max; if ((usbp->setup[0] & USB_RTYPE_DIR_MASK) == USB_RTYPE_DIR_DEV2HOST) { /* IN phase.*/ if (usbp->ep0n > 0) { /* Starts the transmit phase.*/ usbp->ep0state = USB_EP0_TX; usbPrepareTransmit(usbp, 0, usbp->ep0next, usbp->ep0n); osalSysLockFromISR(); usbStartTransmitI(usbp, 0); osalSysUnlockFromISR(); } else { /* No transmission phase, directly receiving the zero sized status packet.*/ usbp->ep0state = USB_EP0_WAITING_STS; #if (USB_EP0_STATUS_STAGE == USB_EP0_STATUS_STAGE_SW) usbPrepareReceive(usbp, 0, NULL, 0); osalSysLockFromISR(); usbStartReceiveI(usbp, 0); osalSysUnlockFromISR(); #else usb_lld_end_setup(usbp, ep); #endif } } else { /* OUT phase.*/ if (usbp->ep0n > 0) { /* Starts the receive phase.*/ usbp->ep0state = USB_EP0_RX; usbPrepareReceive(usbp, 0, usbp->ep0next, usbp->ep0n); osalSysLockFromISR(); usbStartReceiveI(usbp, 0); osalSysUnlockFromISR(); } else { /* No receive phase, directly sending the zero sized status packet.*/ usbp->ep0state = USB_EP0_SENDING_STS; #if (USB_EP0_STATUS_STAGE == USB_EP0_STATUS_STAGE_SW) usbPrepareTransmit(usbp, 0, NULL, 0); osalSysLockFromISR(); usbStartTransmitI(usbp, 0); osalSysUnlockFromISR(); #else usb_lld_end_setup(usbp, ep); #endif } } }