Diff: USBSerialLib/USBDevice/USBHAL_STM32F4.cpp
- Revision:
- 1:6e512faaa17c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/USBSerialLib/USBDevice/USBHAL_STM32F4.cpp Fri Feb 21 20:40:56 2020 +0000
@@ -0,0 +1,416 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* 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.
+*/
+
+#if defined(TARGET_STM32F4)
+
+#include "USBHAL.h"
+#include "USBRegs_STM32.h"
+#include "pinmap.h"
+
+USBHAL * USBHAL::instance;
+
+static volatile int epComplete = 0;
+
+static uint32_t bufferEnd = 0;
+static const uint32_t rxFifoSize = 512;
+static uint32_t rxFifoCount = 0;
+
+static uint32_t setupBuffer[MAX_PACKET_SIZE_EP0 >> 2];
+
+uint32_t USBHAL::endpointReadcore(uint8_t endpoint, uint8_t *buffer) {
+ return 0;
+}
+
+USBHAL::USBHAL(void) {
+ NVIC_DisableIRQ(OTG_FS_IRQn);
+ epCallback[0] = &USBHAL::EP1_OUT_callback;
+ epCallback[1] = &USBHAL::EP1_IN_callback;
+ epCallback[2] = &USBHAL::EP2_OUT_callback;
+ epCallback[3] = &USBHAL::EP2_IN_callback;
+ epCallback[4] = &USBHAL::EP3_OUT_callback;
+ epCallback[5] = &USBHAL::EP3_IN_callback;
+
+ // Enable power and clocking
+ RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
+
+#if defined(TARGET_STM32F407VG) || defined(TARGET_STM32F401RE) || defined(TARGET_STM32F411RE) || defined(TARGET_STM32F429ZI)
+ pin_function(PA_8, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF10_OTG_FS));
+ pin_function(PA_9, STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLDOWN, GPIO_AF10_OTG_FS));
+ pin_function(PA_10, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_PULLUP, GPIO_AF10_OTG_FS));
+ pin_function(PA_11, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF10_OTG_FS));
+ pin_function(PA_12, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF10_OTG_FS));
+#else
+ pin_function(PA_8, STM_PIN_DATA(2, 10));
+ pin_function(PA_9, STM_PIN_DATA(0, 0));
+ pin_function(PA_10, STM_PIN_DATA(2, 10));
+ pin_function(PA_11, STM_PIN_DATA(2, 10));
+ pin_function(PA_12, STM_PIN_DATA(2, 10));
+
+ // Set ID pin to open drain with pull-up resistor
+ pin_mode(PA_10, OpenDrain);
+ GPIOA->PUPDR &= ~(0x3 << 20);
+ GPIOA->PUPDR |= 1 << 20;
+
+ // Set VBUS pin to open drain
+ pin_mode(PA_9, OpenDrain);
+#endif
+
+ RCC->AHB2ENR |= RCC_AHB2ENR_OTGFSEN;
+
+ // Enable interrupts
+ OTG_FS->GREGS.GAHBCFG |= (1 << 0);
+
+ // Turnaround time to maximum value - too small causes packet loss
+ OTG_FS->GREGS.GUSBCFG |= (0xF << 10);
+
+ // Unmask global interrupts
+ OTG_FS->GREGS.GINTMSK |= (1 << 3) | // SOF
+ (1 << 4) | // RX FIFO not empty
+ (1 << 12); // USB reset
+
+ OTG_FS->DREGS.DCFG |= (0x3 << 0) | // Full speed
+ (1 << 2); // Non-zero-length status OUT handshake
+
+ OTG_FS->GREGS.GCCFG |= (1 << 19) | // Enable VBUS sensing
+ (1 << 16); // Power Up
+
+ instance = this;
+ NVIC_SetVector(OTG_FS_IRQn, (uint32_t)&_usbisr);
+ NVIC_SetPriority(OTG_FS_IRQn, 1);
+}
+
+USBHAL::~USBHAL(void) {
+}
+
+void USBHAL::connect(void) {
+ NVIC_EnableIRQ(OTG_FS_IRQn);
+}
+
+void USBHAL::disconnect(void) {
+ NVIC_DisableIRQ(OTG_FS_IRQn);
+}
+
+void USBHAL::configureDevice(void) {
+ // Not needed
+}
+
+void USBHAL::unconfigureDevice(void) {
+ // Not needed
+}
+
+void USBHAL::setAddress(uint8_t address) {
+ OTG_FS->DREGS.DCFG |= (address << 4);
+ EP0write(0, 0);
+}
+
+bool USBHAL::realiseEndpoint(uint8_t endpoint, uint32_t maxPacket,
+ uint32_t flags) {
+ uint32_t epIndex = endpoint >> 1;
+
+ uint32_t type;
+ switch (endpoint) {
+ case EP0IN:
+ case EP0OUT:
+ type = 0;
+ break;
+ case EPISO_IN:
+ case EPISO_OUT:
+ type = 1;
+ case EPBULK_IN:
+ case EPBULK_OUT:
+ type = 2;
+ break;
+ case EPINT_IN:
+ case EPINT_OUT:
+ type = 3;
+ break;
+ }
+
+ // Generic in or out EP controls
+ uint32_t control = (maxPacket << 0) | // Packet size
+ (1 << 15) | // Active endpoint
+ (type << 18); // Endpoint type
+
+ if (endpoint & 0x1) { // In Endpoint
+ // Set up the Tx FIFO
+ if (endpoint == EP0IN) {
+ OTG_FS->GREGS.DIEPTXF0_HNPTXFSIZ = ((maxPacket >> 2) << 16) |
+ (bufferEnd << 0);
+ }
+ else {
+ OTG_FS->GREGS.DIEPTXF[epIndex - 1] = ((maxPacket >> 2) << 16) |
+ (bufferEnd << 0);
+ }
+ bufferEnd += maxPacket >> 2;
+
+ // Set the In EP specific control settings
+ if (endpoint != EP0IN) {
+ control |= (1 << 28); // SD0PID
+ }
+
+ control |= (epIndex << 22) | // TxFIFO index
+ (1 << 27); // SNAK
+ OTG_FS->INEP_REGS[epIndex].DIEPCTL = control;
+
+ // Unmask the interrupt
+ OTG_FS->DREGS.DAINTMSK |= (1 << epIndex);
+ }
+ else { // Out endpoint
+ // Set the out EP specific control settings
+ control |= (1 << 26); // CNAK
+ OTG_FS->OUTEP_REGS[epIndex].DOEPCTL = control;
+
+ // Unmask the interrupt
+ OTG_FS->DREGS.DAINTMSK |= (1 << (epIndex + 16));
+ }
+ return true;
+}
+
+// read setup packet
+void USBHAL::EP0setup(uint8_t *buffer) {
+ memcpy(buffer, setupBuffer, MAX_PACKET_SIZE_EP0);
+}
+
+void USBHAL::EP0readStage(void) {
+}
+
+void USBHAL::EP0read(void) {
+}
+
+uint32_t USBHAL::EP0getReadResult(uint8_t *buffer) {
+ uint32_t* buffer32 = (uint32_t *) buffer;
+ uint32_t length = rxFifoCount;
+ for (uint32_t i = 0; i < length; i += 4) {
+ buffer32[i >> 2] = OTG_FS->FIFO[0][0];
+ }
+
+ rxFifoCount = 0;
+ return length;
+}
+
+void USBHAL::EP0write(uint8_t *buffer, uint32_t size) {
+ endpointWrite(0, buffer, size);
+}
+
+void USBHAL::EP0getWriteResult(void) {
+}
+
+void USBHAL::EP0stall(void) {
+ // If we stall the out endpoint here then we have problems transferring
+ // and setup requests after the (stalled) get device qualifier requests.
+ // TODO: Find out if this is correct behavior, or whether we are doing
+ // something else wrong
+ stallEndpoint(EP0IN);
+// stallEndpoint(EP0OUT);
+}
+
+EP_STATUS USBHAL::endpointRead(uint8_t endpoint, uint32_t maximumSize) {
+ uint32_t epIndex = endpoint >> 1;
+ uint32_t size = (1 << 19) | // 1 packet
+ (maximumSize << 0); // Packet size
+// if (endpoint == EP0OUT) {
+ size |= (1 << 29); // 1 setup packet
+// }
+ OTG_FS->OUTEP_REGS[epIndex].DOEPTSIZ = size;
+ OTG_FS->OUTEP_REGS[epIndex].DOEPCTL |= (1 << 31) | // Enable endpoint
+ (1 << 26); // Clear NAK
+
+ epComplete &= ~(1 << endpoint);
+ return EP_PENDING;
+}
+
+EP_STATUS USBHAL::endpointReadResult(uint8_t endpoint, uint8_t * buffer, uint32_t *bytesRead) {
+ if (!(epComplete & (1 << endpoint))) {
+ return EP_PENDING;
+ }
+
+ uint32_t* buffer32 = (uint32_t *) buffer;
+ uint32_t length = rxFifoCount;
+ for (uint32_t i = 0; i < length; i += 4) {
+ buffer32[i >> 2] = OTG_FS->FIFO[endpoint >> 1][0];
+ }
+ rxFifoCount = 0;
+ *bytesRead = length;
+ return EP_COMPLETED;
+}
+
+EP_STATUS USBHAL::endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size) {
+ uint32_t epIndex = endpoint >> 1;
+ OTG_FS->INEP_REGS[epIndex].DIEPTSIZ = (1 << 19) | // 1 packet
+ (size << 0); // Size of packet
+ OTG_FS->INEP_REGS[epIndex].DIEPCTL |= (1 << 31) | // Enable endpoint
+ (1 << 26); // CNAK
+ OTG_FS->DREGS.DIEPEMPMSK = (1 << epIndex);
+
+ while ((OTG_FS->INEP_REGS[epIndex].DTXFSTS & 0XFFFF) < ((size + 3) >> 2));
+
+ for (uint32_t i=0; i<(size + 3) >> 2; i++, data+=4) {
+ OTG_FS->FIFO[epIndex][0] = *(uint32_t *)data;
+ }
+
+ epComplete &= ~(1 << endpoint);
+
+ return EP_PENDING;
+}
+
+EP_STATUS USBHAL::endpointWriteResult(uint8_t endpoint) {
+ if (epComplete & (1 << endpoint)) {
+ epComplete &= ~(1 << endpoint);
+ return EP_COMPLETED;
+ }
+
+ return EP_PENDING;
+}
+
+void USBHAL::stallEndpoint(uint8_t endpoint) {
+ if (endpoint & 0x1) { // In EP
+ OTG_FS->INEP_REGS[endpoint >> 1].DIEPCTL |= (1 << 30) | // Disable
+ (1 << 21); // Stall
+ }
+ else { // Out EP
+ OTG_FS->DREGS.DCTL |= (1 << 9); // Set global out NAK
+ OTG_FS->OUTEP_REGS[endpoint >> 1].DOEPCTL |= (1 << 30) | // Disable
+ (1 << 21); // Stall
+ }
+}
+
+void USBHAL::unstallEndpoint(uint8_t endpoint) {
+
+}
+
+bool USBHAL::getEndpointStallState(uint8_t endpoint) {
+ return false;
+}
+
+void USBHAL::remoteWakeup(void) {
+}
+
+
+void USBHAL::_usbisr(void) {
+ instance->usbisr();
+}
+
+
+void USBHAL::usbisr(void) {
+ if (OTG_FS->GREGS.GINTSTS & (1 << 11)) { // USB Suspend
+ suspendStateChanged(1);
+ };
+
+ if (OTG_FS->GREGS.GINTSTS & (1 << 12)) { // USB Reset
+ suspendStateChanged(0);
+
+ // Set SNAK bits
+ OTG_FS->OUTEP_REGS[0].DOEPCTL |= (1 << 27);
+ OTG_FS->OUTEP_REGS[1].DOEPCTL |= (1 << 27);
+ OTG_FS->OUTEP_REGS[2].DOEPCTL |= (1 << 27);
+ OTG_FS->OUTEP_REGS[3].DOEPCTL |= (1 << 27);
+
+ OTG_FS->DREGS.DIEPMSK = (1 << 0);
+
+ bufferEnd = 0;
+
+ // Set the receive FIFO size
+ OTG_FS->GREGS.GRXFSIZ = rxFifoSize >> 2;
+ bufferEnd += rxFifoSize >> 2;
+
+ // Create the endpoints, and wait for setup packets on out EP0
+ realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0, 0);
+ realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0, 0);
+ endpointRead(EP0OUT, MAX_PACKET_SIZE_EP0);
+
+ OTG_FS->GREGS.GINTSTS = (1 << 12);
+ }
+
+ if (OTG_FS->GREGS.GINTSTS & (1 << 4)) { // RX FIFO not empty
+ uint32_t status = OTG_FS->GREGS.GRXSTSP;
+
+ uint32_t endpoint = (status & 0xF) << 1;
+ uint32_t length = (status >> 4) & 0x7FF;
+ uint32_t type = (status >> 17) & 0xF;
+
+ rxFifoCount = length;
+
+ if (type == 0x6) {
+ // Setup packet
+ for (uint32_t i=0; i<length; i+=4) {
+ setupBuffer[i >> 2] = OTG_FS->FIFO[0][i >> 2];
+ }
+ rxFifoCount = 0;
+ }
+
+ if (type == 0x4) {
+ // Setup complete
+ EP0setupCallback();
+ endpointRead(EP0OUT, MAX_PACKET_SIZE_EP0);
+ }
+
+ if (type == 0x2) {
+ // Out packet
+ if (endpoint == EP0OUT) {
+ EP0out();
+ }
+ else {
+ epComplete |= (1 << endpoint);
+ if ((instance->*(epCallback[endpoint - 2]))()) {
+ epComplete &= (1 << endpoint);
+ }
+ }
+ }
+
+ for (uint32_t i=0; i<rxFifoCount; i+=4) {
+ (void) OTG_FS->FIFO[0][0];
+ }
+ OTG_FS->GREGS.GINTSTS = (1 << 4);
+ }
+
+ if (OTG_FS->GREGS.GINTSTS & (1 << 18)) { // In endpoint interrupt
+ // Loop through the in endpoints
+ for (uint32_t i=0; i<4; i++) {
+ if (OTG_FS->DREGS.DAINT & (1 << i)) { // Interrupt is on endpoint
+
+ if (OTG_FS->INEP_REGS[i].DIEPINT & (1 << 7)) {// Tx FIFO empty
+ // If the Tx FIFO is empty on EP0 we need to send a further
+ // packet, so call EP0in()
+ if (i == 0) {
+ EP0in();
+ }
+ // Clear the interrupt
+ OTG_FS->INEP_REGS[i].DIEPINT = (1 << 7);
+ // Stop firing Tx empty interrupts
+ // Will get turned on again if another write is called
+ OTG_FS->DREGS.DIEPEMPMSK &= ~(1 << i);
+ }
+
+ // If the transfer is complete
+ if (OTG_FS->INEP_REGS[i].DIEPINT & (1 << 0)) { // Tx Complete
+ epComplete |= (1 << (1 + (i << 1)));
+ OTG_FS->INEP_REGS[i].DIEPINT = (1 << 0);
+ }
+ }
+ }
+ OTG_FS->GREGS.GINTSTS = (1 << 18);
+ }
+
+ if (OTG_FS->GREGS.GINTSTS & (1 << 3)) { // Start of frame
+ SOF((OTG_FS->GREGS.GRXSTSR >> 17) & 0xF);
+ OTG_FS->GREGS.GINTSTS = (1 << 3);
+ }
+}
+
+
+#endif
Paul Jeon
