Sergey Pastor
Webserver+3d print
Diff: cyclone_tcp/drivers/stm32f7xx_eth.c
- Revision:
- 0:8918a71cdbe9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cyclone_tcp/drivers/stm32f7xx_eth.c Sat Feb 04 18:15:49 2017 +0000
@@ -0,0 +1,1057 @@
+/**
+ * @file stm32f7xx_eth.c
+ * @brief STM32F746/756 Ethernet MAC controller
+ *
+ * @section License
+ *
+ * Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
+ *
+ * This file is part of CycloneTCP Open.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * @author Oryx Embedded SARL (www.oryx-embedded.com)
+ * @version 1.7.6
+ **/
+
+//Switch to the appropriate trace level
+#define TRACE_LEVEL NIC_TRACE_LEVEL
+
+//Dependencies
+#include "stm32f7xx.h"
+#include "core/net.h"
+#include "drivers/stm32f7xx_eth.h"
+#include "debug.h"
+
+//Underlying network interface
+static NetInterface *nicDriverInterface;
+
+//IAR EWARM compiler?
+#if defined(__ICCARM__)
+
+//Transmit buffer
+#pragma data_alignment = 4
+#pragma location = ".ram_no_cache"
+static uint8_t txBuffer[STM32F7XX_ETH_TX_BUFFER_COUNT][STM32F7XX_ETH_TX_BUFFER_SIZE];
+//Receive buffer
+#pragma data_alignment = 4
+#pragma location = ".ram_no_cache"
+static uint8_t rxBuffer[STM32F7XX_ETH_RX_BUFFER_COUNT][STM32F7XX_ETH_RX_BUFFER_SIZE];
+//Transmit DMA descriptors
+#pragma data_alignment = 4
+#pragma location = ".ram_no_cache"
+static Stm32f7xxTxDmaDesc txDmaDesc[STM32F7XX_ETH_TX_BUFFER_COUNT];
+//Receive DMA descriptors
+#pragma data_alignment = 4
+#pragma location = ".ram_no_cache"
+static Stm32f7xxRxDmaDesc rxDmaDesc[STM32F7XX_ETH_RX_BUFFER_COUNT];
+
+//Keil MDK-ARM or GCC compiler?
+#else
+
+//Transmit buffer
+static uint8_t txBuffer[STM32F7XX_ETH_TX_BUFFER_COUNT][STM32F7XX_ETH_TX_BUFFER_SIZE]
+ __attribute__((aligned(4), __section__(".ram_no_cache")));
+//Receive buffer
+static uint8_t rxBuffer[STM32F7XX_ETH_RX_BUFFER_COUNT][STM32F7XX_ETH_RX_BUFFER_SIZE]
+ __attribute__((aligned(4), __section__(".ram_no_cache")));
+//Transmit DMA descriptors
+static Stm32f7xxTxDmaDesc txDmaDesc[STM32F7XX_ETH_TX_BUFFER_COUNT]
+ __attribute__((aligned(4), __section__(".ram_no_cache")));
+//Receive DMA descriptors
+static Stm32f7xxRxDmaDesc rxDmaDesc[STM32F7XX_ETH_RX_BUFFER_COUNT]
+ __attribute__((aligned(4), __section__(".ram_no_cache")));
+
+#endif
+
+//Pointer to the current TX DMA descriptor
+static Stm32f7xxTxDmaDesc *txCurDmaDesc;
+//Pointer to the current RX DMA descriptor
+static Stm32f7xxRxDmaDesc *rxCurDmaDesc;
+
+
+/**
+ * @brief STM32F746/756 Ethernet MAC driver
+ **/
+
+const NicDriver stm32f7xxEthDriver =
+{
+ NIC_TYPE_ETHERNET,
+ ETH_MTU,
+ stm32f7xxEthInit,
+ stm32f7xxEthTick,
+ stm32f7xxEthEnableIrq,
+ stm32f7xxEthDisableIrq,
+ stm32f7xxEthEventHandler,
+ stm32f7xxEthSendPacket,
+ stm32f7xxEthSetMulticastFilter,
+ stm32f7xxEthUpdateMacConfig,
+ stm32f7xxEthWritePhyReg,
+ stm32f7xxEthReadPhyReg,
+ TRUE,
+ TRUE,
+ TRUE,
+ FALSE
+};
+
+
+/**
+ * @brief STM32F746/756 Ethernet MAC initialization
+ * @param[in] interface Underlying network interface
+ * @return Error code
+ **/
+
+error_t stm32f7xxEthInit(NetInterface *interface)
+{
+ error_t error;
+
+ //Debug message
+ TRACE_INFO("Initializing STM32F7xx Ethernet MAC...\r\n");
+
+ //Save underlying network interface
+ nicDriverInterface = interface;
+
+ //GPIO configuration
+ stm32f7xxEthInitGpio(interface);
+
+ //Enable Ethernet MAC clock
+ __HAL_RCC_ETHMAC_CLK_ENABLE();
+ __HAL_RCC_ETHMACTX_CLK_ENABLE();
+ __HAL_RCC_ETHMACRX_CLK_ENABLE();
+
+ //Reset Ethernet MAC peripheral
+ __HAL_RCC_ETHMAC_FORCE_RESET();
+ __HAL_RCC_ETHMAC_RELEASE_RESET();
+
+ //Perform a software reset
+ ETH->DMABMR |= ETH_DMABMR_SR;
+ //Wait for the reset to complete
+ while(ETH->DMABMR & ETH_DMABMR_SR);
+
+ //Adjust MDC clock range depending on HCLK frequency
+ ETH->MACMIIAR = ETH_MACMIIAR_CR_Div102;
+
+ //PHY transceiver initialization
+ error = interface->phyDriver->init(interface);
+ //Failed to initialize PHY transceiver?
+ if(error)
+ return error;
+
+ //Use default MAC configuration
+ ETH->MACCR = ETH_MACCR_ROD;
+
+ //Set the MAC address
+ ETH->MACA0LR = interface->macAddr.w[0] | (interface->macAddr.w[1] << 16);
+ ETH->MACA0HR = interface->macAddr.w[2];
+
+ //Initialize hash table
+ ETH->MACHTLR = 0;
+ ETH->MACHTHR = 0;
+
+ //Configure the receive filter
+ ETH->MACFFR = ETH_MACFFR_HPF | ETH_MACFFR_HM;
+ //Disable flow control
+ ETH->MACFCR = 0;
+ //Enable store and forward mode
+ ETH->DMAOMR = ETH_DMAOMR_RSF | ETH_DMAOMR_TSF;
+
+ //Configure DMA bus mode
+ ETH->DMABMR = ETH_DMABMR_AAB | ETH_DMABMR_USP | ETH_DMABMR_RDP_1Beat |
+ ETH_DMABMR_RTPR_1_1 | ETH_DMABMR_PBL_1Beat | ETH_DMABMR_EDE;
+
+ //Initialize DMA descriptor lists
+ stm32f7xxEthInitDmaDesc(interface);
+
+ //Prevent interrupts from being generated when the transmit statistic
+ //counters reach half their maximum value
+ ETH->MMCTIMR = ETH_MMCTIMR_TGFM | ETH_MMCTIMR_TGFMSCM | ETH_MMCTIMR_TGFSCM;
+
+ //Prevent interrupts from being generated when the receive statistic
+ //counters reach half their maximum value
+ ETH->MMCRIMR = ETH_MMCRIMR_RGUFM | ETH_MMCRIMR_RFAEM | ETH_MMCRIMR_RFCEM;
+
+ //Disable MAC interrupts
+ ETH->MACIMR = ETH_MACIMR_TSTIM | ETH_MACIMR_PMTIM;
+ //Enable the desired DMA interrupts
+ ETH->DMAIER = ETH_DMAIER_NISE | ETH_DMAIER_RIE | ETH_DMAIER_TIE;
+
+ //Set priority grouping (4 bits for pre-emption priority, no bits for subpriority)
+ NVIC_SetPriorityGrouping(STM32F7XX_ETH_IRQ_PRIORITY_GROUPING);
+
+ //Configure Ethernet interrupt priority
+ NVIC_SetPriority(ETH_IRQn, NVIC_EncodePriority(STM32F7XX_ETH_IRQ_PRIORITY_GROUPING,
+ STM32F7XX_ETH_IRQ_GROUP_PRIORITY, STM32F7XX_ETH_IRQ_SUB_PRIORITY));
+
+ //Enable MAC transmission and reception
+ ETH->MACCR |= ETH_MACCR_TE | ETH_MACCR_RE;
+ //Enable DMA transmission and reception
+ ETH->DMAOMR |= ETH_DMAOMR_ST | ETH_DMAOMR_SR;
+
+ //Accept any packets from the upper layer
+ osSetEvent(&interface->nicTxEvent);
+
+ //Successful initialization
+ return NO_ERROR;
+}
+
+
+//STM32756G-EVAL, STM32F769I-EVAL, STM32F746G-DISCOVERY,
+//Nucleo-F746ZG or Nucleo-F767ZI evaluation board?
+#if defined(USE_STM32756G_EVAL) || defined(USE_STM32F769I_EVAL) || \
+ defined(USE_STM32746G_DISCO) || defined(USE_STM32F7XX_NUCLEO_144)
+
+/**
+ * @brief GPIO configuration
+ * @param[in] interface Underlying network interface
+ **/
+
+void stm32f7xxEthInitGpio(NetInterface *interface)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+//STM32756G-EVAL or STM32F769I-EVAL evaluation board?
+#if defined(USE_STM32756G_EVAL) || defined(USE_STM32F769I_EVAL)
+ //Enable SYSCFG clock
+ __HAL_RCC_SYSCFG_CLK_ENABLE();
+
+ //Enable GPIO clocks
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+ __HAL_RCC_GPIOC_CLK_ENABLE();
+ __HAL_RCC_GPIOE_CLK_ENABLE();
+ __HAL_RCC_GPIOG_CLK_ENABLE();
+ __HAL_RCC_GPIOH_CLK_ENABLE();
+ __HAL_RCC_GPIOI_CLK_ENABLE();
+
+ //Configure MCO1 (PA8) as an output
+ GPIO_InitStructure.Pin = GPIO_PIN_8;
+ GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStructure.Pull = GPIO_NOPULL;
+ GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
+ GPIO_InitStructure.Alternate = GPIO_AF0_MCO;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ //Configure MCO1 pin to output the HSE clock (25MHz)
+ HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1);
+
+ //Select MII interface mode
+ SYSCFG->PMC &= ~SYSCFG_PMC_MII_RMII_SEL;
+
+#if defined(STM32F7XX_ETH_MDIO_PIN) && defined(STM32F7XX_ETH_MDC_PIN)
+ //Configure ETH_MDIO as a GPIO
+ GPIO_InitStructure.Pin = STM32F7XX_ETH_MDIO_PIN;
+ GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
+ GPIO_InitStructure.Pull = GPIO_PULLUP;
+ GPIO_InitStructure.Speed = GPIO_SPEED_MEDIUM;
+ HAL_GPIO_Init(STM32F7XX_ETH_MDIO_GPIO, &GPIO_InitStructure);
+
+ //Configure ETH_MDC as a GPIO
+ GPIO_InitStructure.Pin = STM32F7XX_ETH_MDC_PIN;
+ GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+ GPIO_InitStructure.Pull = GPIO_NOPULL;
+ GPIO_InitStructure.Speed = GPIO_SPEED_MEDIUM;
+ HAL_GPIO_Init(STM32F7XX_ETH_MDC_GPIO, &GPIO_InitStructure);
+
+ //Deassert MDC
+ HAL_GPIO_WritePin(STM32F7XX_ETH_MDC_GPIO,
+ STM32F7XX_ETH_MDC_PIN, GPIO_PIN_RESET);
+#else
+ //Configure ETH_MDIO (PA2)
+ GPIO_InitStructure.Pin = GPIO_PIN_2;
+ GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStructure.Pull = GPIO_PULLUP;
+ GPIO_InitStructure.Speed = GPIO_SPEED_MEDIUM;
+ GPIO_InitStructure.Alternate = GPIO_AF11_ETH;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ //Configure ETH_MDC (PC1)
+ GPIO_InitStructure.Pin = GPIO_PIN_1;
+ GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStructure.Pull = GPIO_NOPULL;
+ GPIO_InitStructure.Speed = GPIO_SPEED_MEDIUM;
+ GPIO_InitStructure.Alternate = GPIO_AF11_ETH;
+ HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
+#endif
+
+ //Configure MII pins
+ GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStructure.Pull = GPIO_NOPULL;
+ GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
+ GPIO_InitStructure.Alternate = GPIO_AF11_ETH;
+
+ //Configure ETH_MII_CRS (PA0)
+ //GPIO_InitStructure.Pin = GPIO_PIN_0;
+ //HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ //Configure ETH_MII_RX_CLK (PA1) and ETH_MII_RX_DV (PA7)
+ GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_7;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ //Configure ETH_MII_TXD2 (PC2), ETH_MII_TX_CLK (PC3), ETH_MII_RXD0 (PC4)
+ //and ETH_MII_RXD1 (PC5)
+ GPIO_InitStructure.Pin = GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5;
+ HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
+
+ //Configure ETH_MII_TXD3 (PE2)
+ GPIO_InitStructure.Pin = GPIO_PIN_2;
+ HAL_GPIO_Init(GPIOE, &GPIO_InitStructure);
+
+ //Configure ETH_MII_TX_EN (PG11), ETH_MII_TXD0 (PG13) and ETH_MII_TXD1 (PG14)
+ GPIO_InitStructure.Pin = GPIO_PIN_11 | GPIO_PIN_13 | GPIO_PIN_14;
+ HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);
+
+ //Configure ETH_MII_COL (PH3)
+ //GPIO_InitStructure.Pin = GPIO_PIN_3;
+ //HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
+
+ //Configure ETH_MII_RXD2 (PH6) and ETH_MII_RXD3 (PH7)
+ GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
+ HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
+
+ //Configure ETH_MII_RX_ER (PI10)
+ //GPIO_InitStructure.Pin = GPIO_PIN_10;
+ //HAL_GPIO_Init(GPIOI, &GPIO_InitStructure);
+
+//STM32F746G-DISCOVERY evaluation board?
+#elif defined(USE_STM32746G_DISCO)
+ //Enable SYSCFG clock
+ __HAL_RCC_SYSCFG_CLK_ENABLE();
+
+ //Enable GPIO clocks
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+ __HAL_RCC_GPIOC_CLK_ENABLE();
+ __HAL_RCC_GPIOG_CLK_ENABLE();
+
+ //Select RMII interface mode
+ SYSCFG->PMC |= SYSCFG_PMC_MII_RMII_SEL;
+
+ //Configure RMII pins
+ GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStructure.Pull = GPIO_NOPULL;
+ GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
+ GPIO_InitStructure.Alternate = GPIO_AF11_ETH;
+
+ //Configure ETH_RMII_REF_CLK (PA1), ETH_MDIO (PA2) and ETH_RMII_CRS_DV (PA7)
+ GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ //Configure ETH_MDC (PC1), ETH_RMII_RXD0 (PC4) and ETH_RMII_RXD1 (PC5)
+ GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5;
+ HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
+
+ //Configure ETH_RMII_RXER (PG2), RMII_TX_EN (PG11), ETH_RMII_TXD0 (PG13)
+ //and ETH_RMII_TXD1 (PG14)
+ GPIO_InitStructure.Pin = GPIO_PIN_2 | GPIO_PIN_11 | GPIO_PIN_13 | GPIO_PIN_14;
+ HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);
+
+//Nucleo-F746ZG or Nucleo-F767ZI evaluation board?
+#elif defined(USE_STM32F7XX_NUCLEO_144)
+ //Enable SYSCFG clock
+ __HAL_RCC_SYSCFG_CLK_ENABLE();
+
+ //Enable GPIO clocks
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+ __HAL_RCC_GPIOB_CLK_ENABLE();
+ __HAL_RCC_GPIOC_CLK_ENABLE();
+ __HAL_RCC_GPIOG_CLK_ENABLE();
+
+ //Select RMII interface mode
+ SYSCFG->PMC |= SYSCFG_PMC_MII_RMII_SEL;
+
+ //Configure RMII pins
+ GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStructure.Pull = GPIO_NOPULL;
+ GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
+ GPIO_InitStructure.Alternate = GPIO_AF11_ETH;
+
+ //Configure ETH_RMII_REF_CLK (PA1), ETH_MDIO (PA2) and ETH_RMII_CRS_DV (PA7)
+ GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ //Configure ETH_RMII_TXD1 (PB13)
+ GPIO_InitStructure.Pin = GPIO_PIN_13;
+ HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+ //Configure ETH_MDC (PC1), ETH_RMII_RXD0 (PC4) and ETH_RMII_RXD1 (PC5)
+ GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5;
+ HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
+
+ //Configure RMII_TX_EN (PG11), ETH_RMII_TXD0 (PG13)
+ GPIO_InitStructure.Pin = GPIO_PIN_11 | GPIO_PIN_13;
+ HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);
+#endif
+}
+
+#endif
+
+
+/**
+ * @brief Initialize DMA descriptor lists
+ * @param[in] interface Underlying network interface
+ **/
+
+void stm32f7xxEthInitDmaDesc(NetInterface *interface)
+{
+ uint_t i;
+
+ //Initialize TX DMA descriptor list
+ for(i = 0; i < STM32F7XX_ETH_TX_BUFFER_COUNT; i++)
+ {
+ //Use chain structure rather than ring structure
+ txDmaDesc[i].tdes0 = ETH_TDES0_IC | ETH_TDES0_TCH;
+ //Initialize transmit buffer size
+ txDmaDesc[i].tdes1 = 0;
+ //Transmit buffer address
+ txDmaDesc[i].tdes2 = (uint32_t) txBuffer[i];
+ //Next descriptor address
+ txDmaDesc[i].tdes3 = (uint32_t) &txDmaDesc[i + 1];
+ //Reserved fields
+ txDmaDesc[i].tdes4 = 0;
+ txDmaDesc[i].tdes5 = 0;
+ //Transmit frame time stamp
+ txDmaDesc[i].tdes6 = 0;
+ txDmaDesc[i].tdes7 = 0;
+ }
+
+ //The last descriptor is chained to the first entry
+ txDmaDesc[i - 1].tdes3 = (uint32_t) &txDmaDesc[0];
+ //Point to the very first descriptor
+ txCurDmaDesc = &txDmaDesc[0];
+
+ //Initialize RX DMA descriptor list
+ for(i = 0; i < STM32F7XX_ETH_RX_BUFFER_COUNT; i++)
+ {
+ //The descriptor is initially owned by the DMA
+ rxDmaDesc[i].rdes0 = ETH_RDES0_OWN;
+ //Use chain structure rather than ring structure
+ rxDmaDesc[i].rdes1 = ETH_RDES1_RCH | (STM32F7XX_ETH_RX_BUFFER_SIZE & ETH_RDES1_RBS1);
+ //Receive buffer address
+ rxDmaDesc[i].rdes2 = (uint32_t) rxBuffer[i];
+ //Next descriptor address
+ rxDmaDesc[i].rdes3 = (uint32_t) &rxDmaDesc[i + 1];
+ //Extended status
+ rxDmaDesc[i].rdes4 = 0;
+ //Reserved field
+ rxDmaDesc[i].rdes5 = 0;
+ //Receive frame time stamp
+ rxDmaDesc[i].rdes6 = 0;
+ rxDmaDesc[i].rdes7 = 0;
+ }
+
+ //The last descriptor is chained to the first entry
+ rxDmaDesc[i - 1].rdes3 = (uint32_t) &rxDmaDesc[0];
+ //Point to the very first descriptor
+ rxCurDmaDesc = &rxDmaDesc[0];
+
+ //Start location of the TX descriptor list
+ ETH->DMATDLAR = (uint32_t) txDmaDesc;
+ //Start location of the RX descriptor list
+ ETH->DMARDLAR = (uint32_t) rxDmaDesc;
+}
+
+
+/**
+ * @brief STM32F746/756 Ethernet MAC timer handler
+ *
+ * This routine is periodically called by the TCP/IP stack to
+ * handle periodic operations such as polling the link state
+ *
+ * @param[in] interface Underlying network interface
+ **/
+
+void stm32f7xxEthTick(NetInterface *interface)
+{
+ //Handle periodic operations
+ interface->phyDriver->tick(interface);
+}
+
+
+/**
+ * @brief Enable interrupts
+ * @param[in] interface Underlying network interface
+ **/
+
+void stm32f7xxEthEnableIrq(NetInterface *interface)
+{
+ //Enable Ethernet MAC interrupts
+ NVIC_EnableIRQ(ETH_IRQn);
+ //Enable Ethernet PHY interrupts
+ interface->phyDriver->enableIrq(interface);
+}
+
+
+/**
+ * @brief Disable interrupts
+ * @param[in] interface Underlying network interface
+ **/
+
+void stm32f7xxEthDisableIrq(NetInterface *interface)
+{
+ //Disable Ethernet MAC interrupts
+ NVIC_DisableIRQ(ETH_IRQn);
+ //Disable Ethernet PHY interrupts
+ interface->phyDriver->disableIrq(interface);
+}
+
+
+/**
+ * @brief STM32F746/756 Ethernet MAC interrupt service routine
+ **/
+
+void ETH_IRQHandler(void)
+{
+ bool_t flag;
+ uint32_t status;
+
+ //Enter interrupt service routine
+ osEnterIsr();
+
+ //This flag will be set if a higher priority task must be woken
+ flag = FALSE;
+
+ //Read DMA status register
+ status = ETH->DMASR;
+
+ //A packet has been transmitted?
+ if(status & ETH_DMASR_TS)
+ {
+ //Clear TS interrupt flag
+ ETH->DMASR = ETH_DMASR_TS;
+
+ //Check whether the TX buffer is available for writing
+ if(!(txCurDmaDesc->tdes0 & ETH_TDES0_OWN))
+ {
+ //Notify the TCP/IP stack that the transmitter is ready to send
+ flag |= osSetEventFromIsr(&nicDriverInterface->nicTxEvent);
+ }
+ }
+
+ //A packet has been received?
+ if(status & ETH_DMASR_RS)
+ {
+ //Disable RIE interrupt
+ ETH->DMAIER &= ~ETH_DMAIER_RIE;
+
+ //Set event flag
+ nicDriverInterface->nicEvent = TRUE;
+ //Notify the TCP/IP stack of the event
+ flag |= osSetEventFromIsr(&netEvent);
+ }
+
+ //Clear NIS interrupt flag
+ ETH->DMASR = ETH_DMASR_NIS;
+
+ //Leave interrupt service routine
+ osExitIsr(flag);
+}
+
+
+/**
+ * @brief STM32F746/756 Ethernet MAC event handler
+ * @param[in] interface Underlying network interface
+ **/
+
+void stm32f7xxEthEventHandler(NetInterface *interface)
+{
+ error_t error;
+
+ //Packet received?
+ if(ETH->DMASR & ETH_DMASR_RS)
+ {
+ //Clear interrupt flag
+ ETH->DMASR = ETH_DMASR_RS;
+
+ //Process all pending packets
+ do
+ {
+ //Read incoming packet
+ error = stm32f7xxEthReceivePacket(interface);
+
+ //No more data in the receive buffer?
+ } while(error != ERROR_BUFFER_EMPTY);
+ }
+
+ //Re-enable DMA interrupts
+ ETH->DMAIER |= ETH_DMAIER_NISE | ETH_DMAIER_RIE | ETH_DMAIER_TIE;
+}
+
+
+/**
+ * @brief Send a packet
+ * @param[in] interface Underlying network interface
+ * @param[in] buffer Multi-part buffer containing the data to send
+ * @param[in] offset Offset to the first data byte
+ * @return Error code
+ **/
+
+error_t stm32f7xxEthSendPacket(NetInterface *interface,
+ const NetBuffer *buffer, size_t offset)
+{
+ static uint8_t temp[STM32F7XX_ETH_TX_BUFFER_SIZE];
+ size_t length;
+
+ //Retrieve the length of the packet
+ length = netBufferGetLength(buffer) - offset;
+
+ //Check the frame length
+ if(length > STM32F7XX_ETH_TX_BUFFER_SIZE)
+ {
+ //The transmitter can accept another packet
+ osSetEvent(&interface->nicTxEvent);
+ //Report an error
+ return ERROR_INVALID_LENGTH;
+ }
+
+ //Make sure the current buffer is available for writing
+ if(txCurDmaDesc->tdes0 & ETH_TDES0_OWN)
+ return ERROR_FAILURE;
+
+ //Copy user data to the transmit buffer
+ netBufferRead(temp, buffer, offset, length);
+ memcpy((uint8_t *) txCurDmaDesc->tdes2, temp, (length + 3) & ~3UL);
+
+ //Write the number of bytes to send
+ txCurDmaDesc->tdes1 = length & ETH_TDES1_TBS1;
+ //Set LS and FS flags as the data fits in a single buffer
+ txCurDmaDesc->tdes0 |= ETH_TDES0_LS | ETH_TDES0_FS;
+ //Give the ownership of the descriptor to the DMA
+ txCurDmaDesc->tdes0 |= ETH_TDES0_OWN;
+
+ //Data synchronization barrier
+ __DSB();
+
+ //Clear TBUS flag to resume processing
+ ETH->DMASR = ETH_DMASR_TBUS;
+ //Instruct the DMA to poll the transmit descriptor list
+ ETH->DMATPDR = 0;
+
+ //Point to the next descriptor in the list
+ txCurDmaDesc = (Stm32f7xxTxDmaDesc *) txCurDmaDesc->tdes3;
+
+ //Check whether the next buffer is available for writing
+ if(!(txCurDmaDesc->tdes0 & ETH_TDES0_OWN))
+ {
+ //The transmitter can accept another packet
+ osSetEvent(&interface->nicTxEvent);
+ }
+
+ //Data successfully written
+ return NO_ERROR;
+}
+
+
+/**
+ * @brief Receive a packet
+ * @param[in] interface Underlying network interface
+ * @return Error code
+ **/
+
+error_t stm32f7xxEthReceivePacket(NetInterface *interface)
+{
+ static uint8_t temp[STM32F7XX_ETH_RX_BUFFER_SIZE];
+ error_t error;
+ size_t n;
+
+ //The current buffer is available for reading?
+ if(!(rxCurDmaDesc->rdes0 & ETH_RDES0_OWN))
+ {
+ //FS and LS flags should be set
+ if((rxCurDmaDesc->rdes0 & ETH_RDES0_FS) && (rxCurDmaDesc->rdes0 & ETH_RDES0_LS))
+ {
+ //Make sure no error occurred
+ if(!(rxCurDmaDesc->rdes0 & ETH_RDES0_ES))
+ {
+ //Retrieve the length of the frame
+ n = (rxCurDmaDesc->rdes0 & ETH_RDES0_FL) >> 16;
+ //Limit the number of data to read
+ n = MIN(n, STM32F7XX_ETH_RX_BUFFER_SIZE);
+
+ //Copy data from the receive buffer
+ memcpy(temp, (uint8_t *) rxCurDmaDesc->rdes2, (n + 3) & ~3UL);
+
+ //Pass the packet to the upper layer
+ nicProcessPacket(interface, temp, n);
+
+ //Valid packet received
+ error = NO_ERROR;
+ }
+ else
+ {
+ //The received packet contains an error
+ error = ERROR_INVALID_PACKET;
+ }
+ }
+ else
+ {
+ //The packet is not valid
+ error = ERROR_INVALID_PACKET;
+ }
+
+ //Give the ownership of the descriptor back to the DMA
+ rxCurDmaDesc->rdes0 = ETH_RDES0_OWN;
+ //Point to the next descriptor in the list
+ rxCurDmaDesc = (Stm32f7xxRxDmaDesc *) rxCurDmaDesc->rdes3;
+ }
+ else
+ {
+ //No more data in the receive buffer
+ error = ERROR_BUFFER_EMPTY;
+ }
+
+ //Clear RBUS flag to resume processing
+ ETH->DMASR = ETH_DMASR_RBUS;
+ //Instruct the DMA to poll the receive descriptor list
+ ETH->DMARPDR = 0;
+
+ //Return status code
+ return error;
+}
+
+
+/**
+ * @brief Configure multicast MAC address filtering
+ * @param[in] interface Underlying network interface
+ * @return Error code
+ **/
+
+error_t stm32f7xxEthSetMulticastFilter(NetInterface *interface)
+{
+ uint_t i;
+ uint_t k;
+ uint32_t crc;
+ uint32_t hashTable[2];
+ MacFilterEntry *entry;
+
+ //Debug message
+ TRACE_DEBUG("Updating STM32F7xx hash table...\r\n");
+
+ //Clear hash table
+ hashTable[0] = 0;
+ hashTable[1] = 0;
+
+ //The MAC filter table contains the multicast MAC addresses
+ //to accept when receiving an Ethernet frame
+ for(i = 0; i < MAC_MULTICAST_FILTER_SIZE; i++)
+ {
+ //Point to the current entry
+ entry = &interface->macMulticastFilter[i];
+
+ //Valid entry?
+ if(entry->refCount > 0)
+ {
+ //Compute CRC over the current MAC address
+ crc = stm32f7xxEthCalcCrc(&entry->addr, sizeof(MacAddr));
+
+ //The upper 6 bits in the CRC register are used to index the
+ //contents of the hash table
+ k = (crc >> 26) & 0x3F;
+
+ //Update hash table contents
+ hashTable[k / 32] |= (1 << (k % 32));
+ }
+ }
+
+ //Write the hash table
+ ETH->MACHTLR = hashTable[0];
+ ETH->MACHTHR = hashTable[1];
+
+ //Debug message
+ TRACE_DEBUG(" MACHTLR = %08" PRIX32 "\r\n", ETH->MACHTLR);
+ TRACE_DEBUG(" MACHTHR = %08" PRIX32 "\r\n", ETH->MACHTHR);
+
+ //Successful processing
+ return NO_ERROR;
+}
+
+
+/**
+ * @brief Adjust MAC configuration parameters for proper operation
+ * @param[in] interface Underlying network interface
+ * @return Error code
+ **/
+
+error_t stm32f7xxEthUpdateMacConfig(NetInterface *interface)
+{
+ uint32_t config;
+
+ //Read current MAC configuration
+ config = ETH->MACCR;
+
+ //10BASE-T or 100BASE-TX operation mode?
+ if(interface->linkSpeed == NIC_LINK_SPEED_100MBPS)
+ config |= ETH_MACCR_FES;
+ else
+ config &= ~ETH_MACCR_FES;
+
+ //Half-duplex or full-duplex mode?
+ if(interface->duplexMode == NIC_FULL_DUPLEX_MODE)
+ config |= ETH_MACCR_DM;
+ else
+ config &= ~ETH_MACCR_DM;
+
+ //Update MAC configuration register
+ ETH->MACCR = config;
+
+ //Successful processing
+ return NO_ERROR;
+}
+
+
+/**
+ * @brief Write PHY register
+ * @param[in] phyAddr PHY address
+ * @param[in] regAddr Register address
+ * @param[in] data Register value
+ **/
+
+void stm32f7xxEthWritePhyReg(uint8_t phyAddr, uint8_t regAddr, uint16_t data)
+{
+#if defined(STM32F7XX_ETH_MDC_PIN) && defined(STM32F7XX_ETH_MDIO_PIN)
+ //Synchronization pattern
+ stm32f7xxEthWriteSmi(SMI_SYNC, 32);
+ //Start of frame
+ stm32f7xxEthWriteSmi(SMI_START, 2);
+ //Set up a write operation
+ stm32f7xxEthWriteSmi(SMI_WRITE, 2);
+ //Write PHY address
+ stm32f7xxEthWriteSmi(phyAddr, 5);
+ //Write register address
+ stm32f7xxEthWriteSmi(regAddr, 5);
+ //Turnaround
+ stm32f7xxEthWriteSmi(SMI_TA, 2);
+ //Write register value
+ stm32f7xxEthWriteSmi(data, 16);
+ //Release MDIO
+ stm32f7xxEthReadSmi(1);
+#else
+ uint32_t temp;
+
+ //Take care not to alter MDC clock configuration
+ temp = ETH->MACMIIAR & ETH_MACMIIAR_CR;
+ //Set up a write operation
+ temp |= ETH_MACMIIAR_MW | ETH_MACMIIAR_MB;
+ //PHY address
+ temp |= (phyAddr << 11) & ETH_MACMIIAR_PA;
+ //Register address
+ temp |= (regAddr << 6) & ETH_MACMIIAR_MR;
+
+ //Data to be written in the PHY register
+ ETH->MACMIIDR = data & ETH_MACMIIDR_MD;
+
+ //Start a write operation
+ ETH->MACMIIAR = temp;
+ //Wait for the write to complete
+ while(ETH->MACMIIAR & ETH_MACMIIAR_MB);
+#endif
+}
+
+
+/**
+ * @brief Read PHY register
+ * @param[in] phyAddr PHY address
+ * @param[in] regAddr Register address
+ * @return Register value
+ **/
+
+uint16_t stm32f7xxEthReadPhyReg(uint8_t phyAddr, uint8_t regAddr)
+{
+#if defined(STM32F7XX_ETH_MDC_PIN) && defined(STM32F7XX_ETH_MDIO_PIN)
+ uint16_t data;
+
+ //Synchronization pattern
+ stm32f7xxEthWriteSmi(SMI_SYNC, 32);
+ //Start of frame
+ stm32f7xxEthWriteSmi(SMI_START, 2);
+ //Set up a read operation
+ stm32f7xxEthWriteSmi(SMI_READ, 2);
+ //Write PHY address
+ stm32f7xxEthWriteSmi(phyAddr, 5);
+ //Write register address
+ stm32f7xxEthWriteSmi(regAddr, 5);
+ //Turnaround to avoid contention
+ stm32f7xxEthReadSmi(1);
+ //Read register value
+ data = stm32f7xxEthReadSmi(16);
+ //Force the PHY to release the MDIO pin
+ stm32f7xxEthReadSmi(1);
+#else
+ uint16_t data;
+ uint32_t temp;
+
+ //Take care not to alter MDC clock configuration
+ temp = ETH->MACMIIAR & ETH_MACMIIAR_CR;
+ //Set up a read operation
+ temp |= ETH_MACMIIAR_MB;
+ //PHY address
+ temp |= (phyAddr << 11) & ETH_MACMIIAR_PA;
+ //Register address
+ temp |= (regAddr << 6) & ETH_MACMIIAR_MR;
+
+ //Start a read operation
+ ETH->MACMIIAR = temp;
+ //Wait for the read to complete
+ while(ETH->MACMIIAR & ETH_MACMIIAR_MB);
+
+ //Read register value
+ data = ETH->MACMIIDR & ETH_MACMIIDR_MD;
+#endif
+
+ //Return PHY register contents
+ return data;
+}
+
+
+/**
+ * @brief SMI write operation
+ * @param[in] data Raw data to be written
+ * @param[in] length Number of bits to be written
+ **/
+
+void stm32f7xxEthWriteSmi(uint32_t data, uint_t length)
+{
+#if defined(STM32F7XX_ETH_MDC_PIN) && defined(STM32F7XX_ETH_MDIO_PIN)
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ //Skip the most significant bits since they are meaningless
+ data <<= 32 - length;
+
+ //Configure MDIO as an output
+ GPIO_InitStructure.Pin = STM32F7XX_ETH_MDIO_PIN;
+ GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
+ GPIO_InitStructure.Pull = GPIO_NOPULL;
+ GPIO_InitStructure.Speed = GPIO_SPEED_MEDIUM;
+ HAL_GPIO_Init(STM32F7XX_ETH_MDIO_GPIO, &GPIO_InitStructure);
+
+ //Write the specified number of bits
+ while(length--)
+ {
+ //Write MDIO
+ if(data & 0x80000000)
+ {
+ HAL_GPIO_WritePin(STM32F7XX_ETH_MDIO_GPIO,
+ STM32F7XX_ETH_MDIO_PIN, GPIO_PIN_SET);
+ }
+ else
+ {
+ HAL_GPIO_WritePin(STM32F7XX_ETH_MDIO_GPIO,
+ STM32F7XX_ETH_MDIO_PIN, GPIO_PIN_RESET);
+ }
+
+ //Delay
+ usleep(1);
+
+ //Assert MDC
+ HAL_GPIO_WritePin(STM32F7XX_ETH_MDC_GPIO,
+ STM32F7XX_ETH_MDC_PIN, GPIO_PIN_SET);
+
+ //Delay
+ usleep(1);
+
+ //Deassert MDC
+ HAL_GPIO_WritePin(STM32F7XX_ETH_MDC_GPIO,
+ STM32F7XX_ETH_MDC_PIN, GPIO_PIN_RESET);
+
+ //Rotate data
+ data <<= 1;
+ }
+#endif
+}
+
+
+/**
+ * @brief SMI read operation
+ * @param[in] length Number of bits to be read
+ * @return Data resulting from the MDIO read operation
+ **/
+
+uint32_t stm32f7xxEthReadSmi(uint_t length)
+{
+ uint32_t data = 0;
+
+#if defined(STM32F7XX_ETH_MDC_PIN) && defined(STM32F7XX_ETH_MDIO_PIN)
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ //Configure MDIO as an input
+ GPIO_InitStructure.Pin = STM32F7XX_ETH_MDIO_PIN;
+ GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
+ GPIO_InitStructure.Pull = GPIO_PULLUP;
+ GPIO_InitStructure.Speed = GPIO_SPEED_MEDIUM;
+ HAL_GPIO_Init(STM32F7XX_ETH_MDIO_GPIO, &GPIO_InitStructure);
+
+ //Read the specified number of bits
+ while(length--)
+ {
+ //Rotate data
+ data <<= 1;
+
+ //Assert MDC
+ HAL_GPIO_WritePin(STM32F7XX_ETH_MDC_GPIO,
+ STM32F7XX_ETH_MDC_PIN, GPIO_PIN_SET);
+
+ //Delay
+ usleep(1);
+
+ //Deassert MDC
+ HAL_GPIO_WritePin(STM32F7XX_ETH_MDC_GPIO,
+ STM32F7XX_ETH_MDC_PIN, GPIO_PIN_RESET);
+
+ //Delay
+ usleep(1);
+
+ //Check MDIO state
+ if(HAL_GPIO_ReadPin(STM32F7XX_ETH_MDIO_GPIO, STM32F7XX_ETH_MDIO_PIN))
+ data |= 0x00000001;
+ }
+#endif
+
+ //Return the received data
+ return data;
+}
+
+
+/**
+ * @brief CRC calculation
+ * @param[in] data Pointer to the data over which to calculate the CRC
+ * @param[in] length Number of bytes to process
+ * @return Resulting CRC value
+ **/
+
+uint32_t stm32f7xxEthCalcCrc(const void *data, size_t length)
+{
+ uint_t i;
+ uint_t j;
+
+ //Point to the data over which to calculate the CRC
+ const uint8_t *p = (uint8_t *) data;
+ //CRC preset value
+ uint32_t crc = 0xFFFFFFFF;
+
+ //Loop through data
+ for(i = 0; i < length; i++)
+ {
+ //The message is processed bit by bit
+ for(j = 0; j < 8; j++)
+ {
+ //Update CRC value
+ if(((crc >> 31) ^ (p[i] >> j)) & 0x01)
+ crc = (crc << 1) ^ 0x04C11DB7;
+ else
+ crc = crc << 1;
+ }
+ }
+
+ //Return CRC value
+ return ~crc;
+}
+