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Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_emac.c
- Revision:
- 3:f151d08d335c
- Parent:
- 2:1df0b61d3b5a
--- a/libs/LPC17xx/LPC17xxLib/src/lpc17xx_emac.c Fri Feb 28 18:52:52 2014 -0800 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,960 +0,0 @@ -#ifdef __LPC17XX__ - -/********************************************************************** -* $Id$ lpc17xx_dac.c 2010-05-21 -*//** -* @file lpc17xx_dac.c -* @brief Contains all functions support for Ethernet MAC firmware -* library on LPC17xx -* @version 2.0 -* @date 21. May. 2010 -* @author NXP MCU SW Application Team -* -* Copyright(C) 2010, NXP Semiconductor -* All rights reserved. -* -*********************************************************************** -* Software that is described herein is for illustrative purposes only -* which provides customers with programming information regarding the -* products. This software is supplied "AS IS" without any warranties. -* NXP Semiconductors assumes no responsibility or liability for the -* use of the software, conveys no license or title under any patent, -* copyright, or mask work right to the product. NXP Semiconductors -* reserves the right to make changes in the software without -* notification. NXP Semiconductors also make no representation or -* warranty that such application will be suitable for the specified -* use without further testing or modification. -**********************************************************************/ - -/* Peripheral group ----------------------------------------------------------- */ -/** @addtogroup EMAC - * @{ - */ - -/* Includes ------------------------------------------------------------------- */ -#include "lpc17xx_emac.h" -#include "lpc17xx_clkpwr.h" - -/* If this source file built with example, the LPC17xx FW library configuration - * file in each example directory ("lpc17xx_libcfg.h") must be included, - * otherwise the default FW library configuration file must be included instead - */ -#ifdef __BUILD_WITH_EXAMPLE__ -#include "lpc17xx_libcfg.h" -#else -#include "lpc17xx_libcfg_default.h" -#endif /* __BUILD_WITH_EXAMPLE__ */ - - -#ifdef _EMAC - -/* Private Variables ---------------------------------------------------------- */ -/** @defgroup EMAC_Private_Variables EMAC Private Variables - * @{ - */ - -/* MII Mgmt Configuration register - Clock divider setting */ -const uint8_t EMAC_clkdiv[] = { 4, 6, 8, 10, 14, 20, 28 }; - -/* EMAC local DMA Descriptors */ - -/** Rx Descriptor data array */ -static RX_Desc Rx_Desc[EMAC_NUM_RX_FRAG]; - -/** Rx Status data array - Must be 8-Byte aligned */ -#if defined ( __CC_ARM ) -static __align(8) RX_Stat Rx_Stat[EMAC_NUM_RX_FRAG]; -#elif defined ( __ICCARM__ ) -#pragma data_alignment=8 -static RX_Stat Rx_Stat[EMAC_NUM_RX_FRAG]; -#elif defined ( __GNUC__ ) -static __attribute__ ((aligned (8))) RX_Stat Rx_Stat[EMAC_NUM_RX_FRAG]; -#endif - -/** Tx Descriptor data array */ -static TX_Desc Tx_Desc[EMAC_NUM_TX_FRAG]; -/** Tx Status data array */ -static TX_Stat Tx_Stat[EMAC_NUM_TX_FRAG]; - -/* EMAC local DMA buffers */ -/** Rx buffer data */ -static uint32_t rx_buf[EMAC_NUM_RX_FRAG][EMAC_ETH_MAX_FLEN>>2]; -/** Tx buffer data */ -static uint32_t tx_buf[EMAC_NUM_TX_FRAG][EMAC_ETH_MAX_FLEN>>2]; - -/** - * @} - */ - -/* Private Functions ---------------------------------------------------------- */ -static void rx_descr_init (void); -static void tx_descr_init (void); -static int32_t write_PHY (uint32_t PhyReg, uint16_t Value); -static int32_t read_PHY (uint32_t PhyReg); - -static void setEmacAddr(uint8_t abStationAddr[]); -static int32_t emac_CRCCalc(uint8_t frame_no_fcs[], int32_t frame_len); - - -/*--------------------------- rx_descr_init ---------------------------------*/ -/*********************************************************************//** - * @brief Initializes RX Descriptor - * @param[in] None - * @return None - ***********************************************************************/ -static void rx_descr_init (void) -{ - /* Initialize Receive Descriptor and Status array. */ - uint32_t i; - - for (i = 0; i < EMAC_NUM_RX_FRAG; i++) { - Rx_Desc[i].Packet = (uint32_t)&rx_buf[i]; - Rx_Desc[i].Ctrl = EMAC_RCTRL_INT | (EMAC_ETH_MAX_FLEN - 1); - Rx_Stat[i].Info = 0; - Rx_Stat[i].HashCRC = 0; - } - - /* Set EMAC Receive Descriptor Registers. */ - LPC_EMAC->RxDescriptor = (uint32_t)&Rx_Desc[0]; - LPC_EMAC->RxStatus = (uint32_t)&Rx_Stat[0]; - LPC_EMAC->RxDescriptorNumber = EMAC_NUM_RX_FRAG - 1; - - /* Rx Descriptors Point to 0 */ - LPC_EMAC->RxConsumeIndex = 0; -} - - -/*--------------------------- tx_descr_init ---- ----------------------------*/ -/*********************************************************************//** - * @brief Initializes TX Descriptor - * @param[in] None - * @return None - ***********************************************************************/ -static void tx_descr_init (void) { - /* Initialize Transmit Descriptor and Status array. */ - uint32_t i; - - for (i = 0; i < EMAC_NUM_TX_FRAG; i++) { - Tx_Desc[i].Packet = (uint32_t)&tx_buf[i]; - Tx_Desc[i].Ctrl = 0; - Tx_Stat[i].Info = 0; - } - - /* Set EMAC Transmit Descriptor Registers. */ - LPC_EMAC->TxDescriptor = (uint32_t)&Tx_Desc[0]; - LPC_EMAC->TxStatus = (uint32_t)&Tx_Stat[0]; - LPC_EMAC->TxDescriptorNumber = EMAC_NUM_TX_FRAG - 1; - - /* Tx Descriptors Point to 0 */ - LPC_EMAC->TxProduceIndex = 0; -} - - -/*--------------------------- write_PHY -------------------------------------*/ -/*********************************************************************//** - * @brief Write value to PHY device - * @param[in] PhyReg: PHY Register address - * @param[in] Value: Value to write - * @return 0 - if success - * 1 - if fail - ***********************************************************************/ -static int32_t write_PHY (uint32_t PhyReg, uint16_t Value) -{ - /* Write a data 'Value' to PHY register 'PhyReg'. */ - uint32_t tout; - - LPC_EMAC->MADR = EMAC_DEF_ADR | PhyReg; - LPC_EMAC->MWTD = Value; - - /* Wait until operation completed */ - tout = 0; - for (tout = 0; tout < EMAC_MII_WR_TOUT; tout++) { - if ((LPC_EMAC->MIND & EMAC_MIND_BUSY) == 0) { - return (0); - } - } - // Time out! - return (-1); -} - - -/*--------------------------- read_PHY --------------------------------------*/ -/*********************************************************************//** - * @brief Read value from PHY device - * @param[in] PhyReg: PHY Register address - * @return 0 - if success - * 1 - if fail - ***********************************************************************/ -static int32_t read_PHY (uint32_t PhyReg) -{ - /* Read a PHY register 'PhyReg'. */ - uint32_t tout; - - LPC_EMAC->MADR = EMAC_DEF_ADR | PhyReg; - LPC_EMAC->MCMD = EMAC_MCMD_READ; - - /* Wait until operation completed */ - tout = 0; - for (tout = 0; tout < EMAC_MII_RD_TOUT; tout++) { - if ((LPC_EMAC->MIND & EMAC_MIND_BUSY) == 0) { - LPC_EMAC->MCMD = 0; - return (LPC_EMAC->MRDD); - } - } - // Time out! - return (-1); -} - -/*********************************************************************//** - * @brief Set Station MAC address for EMAC module - * @param[in] abStationAddr Pointer to Station address that contains 6-bytes - * of MAC address (should be in order from MAC Address 1 to MAC Address 6) - * @return None - **********************************************************************/ -static void setEmacAddr(uint8_t abStationAddr[]) -{ - /* Set the Ethernet MAC Address registers */ - LPC_EMAC->SA0 = ((uint32_t)abStationAddr[5] << 8) | (uint32_t)abStationAddr[4]; - LPC_EMAC->SA1 = ((uint32_t)abStationAddr[3] << 8) | (uint32_t)abStationAddr[2]; - LPC_EMAC->SA2 = ((uint32_t)abStationAddr[1] << 8) | (uint32_t)abStationAddr[0]; -} - - -/*********************************************************************//** - * @brief Calculates CRC code for number of bytes in the frame - * @param[in] frame_no_fcs Pointer to the first byte of the frame - * @param[in] frame_len length of the frame without the FCS - * @return the CRC as a 32 bit integer - **********************************************************************/ -static int32_t emac_CRCCalc(uint8_t frame_no_fcs[], int32_t frame_len) -{ - int i; // iterator - int j; // another iterator - char byte; // current byte - int crc; // CRC result - int q0, q1, q2, q3; // temporary variables - crc = 0xFFFFFFFF; - for (i = 0; i < frame_len; i++) { - byte = *frame_no_fcs++; - for (j = 0; j < 2; j++) { - if (((crc >> 28) ^ (byte >> 3)) & 0x00000001) { - q3 = 0x04C11DB7; - } else { - q3 = 0x00000000; - } - if (((crc >> 29) ^ (byte >> 2)) & 0x00000001) { - q2 = 0x09823B6E; - } else { - q2 = 0x00000000; - } - if (((crc >> 30) ^ (byte >> 1)) & 0x00000001) { - q1 = 0x130476DC; - } else { - q1 = 0x00000000; - } - if (((crc >> 31) ^ (byte >> 0)) & 0x00000001) { - q0 = 0x2608EDB8; - } else { - q0 = 0x00000000; - } - crc = (crc << 4) ^ q3 ^ q2 ^ q1 ^ q0; - byte >>= 4; - } - } - return crc; -} -/* End of Private Functions --------------------------------------------------- */ - - -/* Public Functions ----------------------------------------------------------- */ -/** @addtogroup EMAC_Public_Functions - * @{ - */ - - -/*********************************************************************//** - * @brief Initializes the EMAC peripheral according to the specified -* parameters in the EMAC_ConfigStruct. - * @param[in] EMAC_ConfigStruct Pointer to a EMAC_CFG_Type structure -* that contains the configuration information for the -* specified EMAC peripheral. - * @return None - * - * Note: This function will initialize EMAC module according to procedure below: - * - Remove the soft reset condition from the MAC - * - Configure the PHY via the MIIM interface of the MAC - * - Select RMII mode - * - Configure the transmit and receive DMA engines, including the descriptor arrays - * - Configure the host registers (MAC1,MAC2 etc.) in the MAC - * - Enable the receive and transmit data paths - * In default state after initializing, only Rx Done and Tx Done interrupt are enabled, - * all remain interrupts are disabled - * (Ref. from LPC17xx UM) - **********************************************************************/ -Status EMAC_Init(EMAC_CFG_Type *EMAC_ConfigStruct) -{ - /* Initialize the EMAC Ethernet controller. */ - int32_t regv,tout, tmp; - - /* Set up clock and power for Ethernet module */ - CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCENET, ENABLE); - - /* Reset all EMAC internal modules */ - LPC_EMAC->MAC1 = EMAC_MAC1_RES_TX | EMAC_MAC1_RES_MCS_TX | EMAC_MAC1_RES_RX | - EMAC_MAC1_RES_MCS_RX | EMAC_MAC1_SIM_RES | EMAC_MAC1_SOFT_RES; - - LPC_EMAC->Command = EMAC_CR_REG_RES | EMAC_CR_TX_RES | EMAC_CR_RX_RES | EMAC_CR_PASS_RUNT_FRM; - - /* A short delay after reset. */ - for (tout = 100; tout; tout--); - - /* Initialize MAC control registers. */ - LPC_EMAC->MAC1 = EMAC_MAC1_PASS_ALL; - LPC_EMAC->MAC2 = EMAC_MAC2_CRC_EN | EMAC_MAC2_PAD_EN; - LPC_EMAC->MAXF = EMAC_ETH_MAX_FLEN; - /* - * Find the clock that close to desired target clock - */ - tmp = SystemCoreClock / EMAC_MCFG_MII_MAXCLK; - for (tout = 0; tout < (int32_t) sizeof (EMAC_clkdiv); tout++){ - if (EMAC_clkdiv[tout] >= tmp) break; - } - tout++; - // Write to MAC configuration register and reset - LPC_EMAC->MCFG = EMAC_MCFG_CLK_SEL(tout) | EMAC_MCFG_RES_MII; - // release reset - LPC_EMAC->MCFG &= ~(EMAC_MCFG_RES_MII); - LPC_EMAC->CLRT = EMAC_CLRT_DEF; - LPC_EMAC->IPGR = EMAC_IPGR_P2_DEF; - - /* Enable Reduced MII interface. */ - LPC_EMAC->Command = EMAC_CR_RMII | EMAC_CR_PASS_RUNT_FRM; - - /* Reset Reduced MII Logic. */ - LPC_EMAC->SUPP = EMAC_SUPP_RES_RMII; - - for (tout = 100; tout; tout--); - LPC_EMAC->SUPP = 0; - - /* Put the DP83848C in reset mode */ - write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_BMCR_RESET); - - /* Wait for hardware reset to end. */ - for (tout = EMAC_PHY_RESP_TOUT; tout; tout--) { - regv = read_PHY (EMAC_PHY_REG_BMCR); - if (!(regv & (EMAC_PHY_BMCR_RESET | EMAC_PHY_BMCR_POWERDOWN))) { - /* Reset complete, device not Power Down. */ - break; - } - if (tout == 0){ - // Time out, return ERROR - return (ERROR); - } - } - - // Set PHY mode - if (EMAC_SetPHYMode(EMAC_ConfigStruct->Mode) < 0){ - return (ERROR); - } - - // Set EMAC address - setEmacAddr(EMAC_ConfigStruct->pbEMAC_Addr); - - /* Initialize Tx and Rx DMA Descriptors */ - rx_descr_init (); - tx_descr_init (); - - // Set Receive Filter register: enable broadcast and multicast - LPC_EMAC->RxFilterCtrl = EMAC_RFC_MCAST_EN | EMAC_RFC_BCAST_EN | EMAC_RFC_PERFECT_EN; - - /* Enable Rx Done and Tx Done interrupt for EMAC */ - LPC_EMAC->IntEnable = EMAC_INT_RX_DONE | EMAC_INT_TX_DONE; - - /* Reset all interrupts */ - LPC_EMAC->IntClear = 0xFFFF; - - /* Enable receive and transmit mode of MAC Ethernet core */ - LPC_EMAC->Command |= (EMAC_CR_RX_EN | EMAC_CR_TX_EN); - LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN; - - return SUCCESS; -} - - -/*********************************************************************//** - * @brief De-initializes the EMAC peripheral registers to their -* default reset values. - * @param[in] None - * @return None - **********************************************************************/ -void EMAC_DeInit(void) -{ - // Disable all interrupt - LPC_EMAC->IntEnable = 0x00; - // Clear all pending interrupt - LPC_EMAC->IntClear = (0xFF) | (EMAC_INT_SOFT_INT | EMAC_INT_WAKEUP); - - /* TurnOff clock and power for Ethernet module */ - CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCENET, DISABLE); -} - - -/*********************************************************************//** - * @brief Check specified PHY status in EMAC peripheral - * @param[in] ulPHYState Specified PHY Status Type, should be: - * - EMAC_PHY_STAT_LINK: Link Status - * - EMAC_PHY_STAT_SPEED: Speed Status - * - EMAC_PHY_STAT_DUP: Duplex Status - * @return Status of specified PHY status (0 or 1). - * (-1) if error. - * - * Note: - * For EMAC_PHY_STAT_LINK, return value: - * - 0: Link Down - * - 1: Link Up - * For EMAC_PHY_STAT_SPEED, return value: - * - 0: 10Mbps - * - 1: 100Mbps - * For EMAC_PHY_STAT_DUP, return value: - * - 0: Half-Duplex - * - 1: Full-Duplex - **********************************************************************/ -int32_t EMAC_CheckPHYStatus(uint32_t ulPHYState) -{ - int32_t regv, tmp; -#ifdef MCB_LPC_1768 - regv = read_PHY (EMAC_PHY_REG_STS); - switch(ulPHYState){ - case EMAC_PHY_STAT_LINK: - tmp = (regv & EMAC_PHY_SR_LINK) ? 1 : 0; - break; - case EMAC_PHY_STAT_SPEED: - tmp = (regv & EMAC_PHY_SR_SPEED) ? 0 : 1; - break; - case EMAC_PHY_STAT_DUP: - tmp = (regv & EMAC_PHY_SR_FULL_DUP) ? 1 : 0; - break; -#elif defined(IAR_LPC_1768) - /* Use IAR_LPC_1768 board: - * FSZ8721BL doesn't have Status Register - * so we read Basic Mode Status Register (0x01h) instead - */ - regv = read_PHY (EMAC_PHY_REG_BMSR); - switch(ulPHYState){ - case EMAC_PHY_STAT_LINK: - tmp = (regv & EMAC_PHY_BMSR_LINK_STATUS) ? 1 : 0; - break; - case EMAC_PHY_STAT_SPEED: - tmp = (regv & EMAC_PHY_SR_100_SPEED) ? 1 : 0; - break; - case EMAC_PHY_STAT_DUP: - tmp = (regv & EMAC_PHY_SR_FULL_DUP) ? 1 : 0; - break; -#endif - default: - tmp = -1; - break; - } - return (tmp); -} - - -/*********************************************************************//** - * @brief Set specified PHY mode in EMAC peripheral - * @param[in] ulPHYMode Specified PHY mode, should be: - * - EMAC_MODE_AUTO - * - EMAC_MODE_10M_FULL - * - EMAC_MODE_10M_HALF - * - EMAC_MODE_100M_FULL - * - EMAC_MODE_100M_HALF - * @return Return (0) if no error, otherwise return (-1) - **********************************************************************/ -int32_t EMAC_SetPHYMode(uint32_t ulPHYMode) -{ - int32_t id1, id2, tout, regv; - - /* Check if this is a DP83848C PHY. */ - id1 = read_PHY (EMAC_PHY_REG_IDR1); - id2 = read_PHY (EMAC_PHY_REG_IDR2); - -#ifdef MCB_LPC_1768 - if (((id1 << 16) | (id2 & 0xFFF0)) == EMAC_DP83848C_ID) { - switch(ulPHYMode){ - case EMAC_MODE_AUTO: - write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_AUTO_NEG); -#elif defined(IAR_LPC_1768) /* Use IAR LPC1768 KickStart board */ - if (((id1 << 16) | id2) == EMAC_KSZ8721BL_ID) { - /* Configure the PHY device */ - switch(ulPHYMode){ - case EMAC_MODE_AUTO: - /* Use auto-negotiation about the link speed. */ - write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_AUTO_NEG); -// write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_BMCR_AN); -#endif - /* Wait to complete Auto_Negotiation */ - for (tout = EMAC_PHY_RESP_TOUT; tout; tout--) { - regv = read_PHY (EMAC_PHY_REG_BMSR); - if (regv & EMAC_PHY_BMSR_AUTO_DONE) { - /* Auto-negotiation Complete. */ - break; - } - if (tout == 0){ - // Time out, return error - return (-1); - } - } - break; - case EMAC_MODE_10M_FULL: - /* Connect at 10MBit full-duplex */ - write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_FULLD_10M); - break; - case EMAC_MODE_10M_HALF: - /* Connect at 10MBit half-duplex */ - write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_HALFD_10M); - break; - case EMAC_MODE_100M_FULL: - /* Connect at 100MBit full-duplex */ - write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_FULLD_100M); - break; - case EMAC_MODE_100M_HALF: - /* Connect at 100MBit half-duplex */ - write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_HALFD_100M); - break; - default: - // un-supported - return (-1); - } - } - // It's not correct module ID - else { - return (-1); - } - - // Update EMAC configuration with current PHY status - if (EMAC_UpdatePHYStatus() < 0){ - return (-1); - } - - // Complete - return (0); -} - - -/*********************************************************************//** - * @brief Auto-Configures value for the EMAC configuration register to - * match with current PHY mode - * @param[in] None - * @return Return (0) if no error, otherwise return (-1) - * - * Note: The EMAC configuration will be auto-configured: - * - Speed mode. - * - Half/Full duplex mode - **********************************************************************/ -int32_t EMAC_UpdatePHYStatus(void) -{ - int32_t regv, tout; - - /* Check the link status. */ -#ifdef MCB_LPC_1768 - for (tout = EMAC_PHY_RESP_TOUT; tout; tout--) { - regv = read_PHY (EMAC_PHY_REG_STS); - if (regv & EMAC_PHY_SR_LINK) { - /* Link is on. */ - break; - } - if (tout == 0){ - // time out - return (-1); - } - } - /* Configure Full/Half Duplex mode. */ - if (regv & EMAC_PHY_SR_DUP) { - /* Full duplex is enabled. */ - LPC_EMAC->MAC2 |= EMAC_MAC2_FULL_DUP; - LPC_EMAC->Command |= EMAC_CR_FULL_DUP; - LPC_EMAC->IPGT = EMAC_IPGT_FULL_DUP; - } else { - /* Half duplex mode. */ - LPC_EMAC->IPGT = EMAC_IPGT_HALF_DUP; - } - if (regv & EMAC_PHY_SR_SPEED) { - /* 10MBit mode. */ - LPC_EMAC->SUPP = 0; - } else { - /* 100MBit mode. */ - LPC_EMAC->SUPP = EMAC_SUPP_SPEED; - } -#elif defined(IAR_LPC_1768) - for (tout = EMAC_PHY_RESP_TOUT; tout; tout--) { - regv = read_PHY (EMAC_PHY_REG_BMSR); - if (regv & EMAC_PHY_BMSR_LINK_STATUS) { - /* Link is on. */ - break; - } - if (tout == 0){ - // time out - return (-1); - } - } - - /* Configure Full/Half Duplex mode. */ - if (regv & EMAC_PHY_SR_FULL_DUP) { - /* Full duplex is enabled. */ - LPC_EMAC->MAC2 |= EMAC_MAC2_FULL_DUP; - LPC_EMAC->Command |= EMAC_CR_FULL_DUP; - LPC_EMAC->IPGT = EMAC_IPGT_FULL_DUP; - } else { - /* Half duplex mode. */ - LPC_EMAC->IPGT = EMAC_IPGT_HALF_DUP; - } - - /* Configure 100MBit/10MBit mode. */ - if (!(regv & EMAC_PHY_SR_100_SPEED)) { - /* 10MBit mode. */ - LPC_EMAC->SUPP = 0; - } else { - /* 100MBit mode. */ - LPC_EMAC->SUPP = EMAC_SUPP_SPEED; - } -#endif - // Complete - return (0); -} - - -/*********************************************************************//** - * @brief Enable/Disable hash filter functionality for specified destination - * MAC address in EMAC module - * @param[in] dstMAC_addr Pointer to the first MAC destination address, should - * be 6-bytes length, in order LSB to the MSB - * @param[in] NewState New State of this command, should be: - * - ENABLE. - * - DISABLE. - * @return None - * - * Note: - * The standard Ethernet cyclic redundancy check (CRC) function is calculated from - * the 6 byte destination address in the Ethernet frame (this CRC is calculated - * anyway as part of calculating the CRC of the whole frame), then bits [28:23] out of - * the 32 bits CRC result are taken to form the hash. The 6 bit hash is used to access - * the hash table: it is used as an index in the 64 bit HashFilter register that has been - * programmed with accept values. If the selected accept value is 1, the frame is - * accepted. - **********************************************************************/ -void EMAC_SetHashFilter(uint8_t dstMAC_addr[], FunctionalState NewState) -{ - volatile uint32_t *pReg; - uint32_t tmp; - int32_t crc; - - // Calculate the CRC from the destination MAC address - crc = emac_CRCCalc(dstMAC_addr, 6); - // Extract the value from CRC to get index value for hash filter table - crc = (crc >> 23) & 0x3F; - - pReg = (crc > 31) ? ((volatile uint32_t *)&LPC_EMAC->HashFilterH) \ - : ((volatile uint32_t *)&LPC_EMAC->HashFilterL); - tmp = (crc > 31) ? (crc - 32) : crc; - if (NewState == ENABLE) { - (*pReg) |= (1UL << tmp); - } else { - (*pReg) &= ~(1UL << tmp); - } - // Enable Rx Filter - LPC_EMAC->Command &= ~EMAC_CR_PASS_RX_FILT; -} - -/*********************************************************************//** - * @brief Enable/Disable Filter mode for each specified type EMAC peripheral - * @param[in] ulFilterMode Filter mode, should be: - * - EMAC_RFC_UCAST_EN: all frames of unicast types - * will be accepted - * - EMAC_RFC_BCAST_EN: broadcast frame will be - * accepted - * - EMAC_RFC_MCAST_EN: all frames of multicast - * types will be accepted - * - EMAC_RFC_UCAST_HASH_EN: The imperfect hash - * filter will be applied to unicast addresses - * - EMAC_RFC_MCAST_HASH_EN: The imperfect hash - * filter will be applied to multicast addresses - * - EMAC_RFC_PERFECT_EN: the destination address - * will be compared with the 6 byte station address - * programmed in the station address by the filter - * - EMAC_RFC_MAGP_WOL_EN: the result of the magic - * packet filter will generate a WoL interrupt when - * there is a match - * - EMAC_RFC_PFILT_WOL_EN: the result of the perfect address - * matching filter and the imperfect hash filter will - * generate a WoL interrupt when there is a match - * @param[in] NewState New State of this command, should be: - * - ENABLE - * - DISABLE - * @return None - **********************************************************************/ -void EMAC_SetFilterMode(uint32_t ulFilterMode, FunctionalState NewState) -{ - if (NewState == ENABLE){ - LPC_EMAC->RxFilterCtrl |= ulFilterMode; - } else { - LPC_EMAC->RxFilterCtrl &= ~ulFilterMode; - } -} - -/*********************************************************************//** - * @brief Get status of Wake On LAN Filter for each specified - * type in EMAC peripheral, clear this status if it is set - * @param[in] ulWoLMode WoL Filter mode, should be: - * - EMAC_WOL_UCAST: unicast frames caused WoL - * - EMAC_WOL_UCAST: broadcast frame caused WoL - * - EMAC_WOL_MCAST: multicast frame caused WoL - * - EMAC_WOL_UCAST_HASH: unicast frame that passes the - * imperfect hash filter caused WoL - * - EMAC_WOL_MCAST_HASH: multicast frame that passes the - * imperfect hash filter caused WoL - * - EMAC_WOL_PERFECT:perfect address matching filter - * caused WoL - * - EMAC_WOL_RX_FILTER: the receive filter caused WoL - * - EMAC_WOL_MAG_PACKET: the magic packet filter caused WoL - * @return SET/RESET - **********************************************************************/ -FlagStatus EMAC_GetWoLStatus(uint32_t ulWoLMode) -{ - if (LPC_EMAC->RxFilterWoLStatus & ulWoLMode) { - LPC_EMAC->RxFilterWoLClear = ulWoLMode; - return SET; - } else { - return RESET; - } -} - - -/*********************************************************************//** - * @brief Write data to Tx packet data buffer at current index due to - * TxProduceIndex - * @param[in] pDataStruct Pointer to a EMAC_PACKETBUF_Type structure - * data that contain specified information about - * Packet data buffer. - * @return None - **********************************************************************/ -void EMAC_WritePacketBuffer(EMAC_PACKETBUF_Type *pDataStruct) -{ - uint32_t idx,len; - uint32_t *sp,*dp; - - idx = LPC_EMAC->TxProduceIndex; - sp = (uint32_t *)pDataStruct->pbDataBuf; - dp = (uint32_t *)Tx_Desc[idx].Packet; - /* Copy frame data to EMAC packet buffers. */ - for (len = (pDataStruct->ulDataLen + 3) >> 2; len; len--) { - *dp++ = *sp++; - } - Tx_Desc[idx].Ctrl = (pDataStruct->ulDataLen - 1) | (EMAC_TCTRL_INT | EMAC_TCTRL_LAST); -} - -/*********************************************************************//** - * @brief Read data from Rx packet data buffer at current index due - * to RxConsumeIndex - * @param[in] pDataStruct Pointer to a EMAC_PACKETBUF_Type structure - * data that contain specified information about - * Packet data buffer. - * @return None - **********************************************************************/ -void EMAC_ReadPacketBuffer(EMAC_PACKETBUF_Type *pDataStruct) -{ - uint32_t idx, len; - uint32_t *dp, *sp; - - idx = LPC_EMAC->RxConsumeIndex; - dp = (uint32_t *)pDataStruct->pbDataBuf; - sp = (uint32_t *)Rx_Desc[idx].Packet; - - if (pDataStruct->pbDataBuf != NULL) { - for (len = (pDataStruct->ulDataLen + 3) >> 2; len; len--) { - *dp++ = *sp++; - } - } -} - -/*********************************************************************//** - * @brief Enable/Disable interrupt for each type in EMAC - * @param[in] ulIntType Interrupt Type, should be: - * - EMAC_INT_RX_OVERRUN: Receive Overrun - * - EMAC_INT_RX_ERR: Receive Error - * - EMAC_INT_RX_FIN: Receive Descriptor Finish - * - EMAC_INT_RX_DONE: Receive Done - * - EMAC_INT_TX_UNDERRUN: Transmit Under-run - * - EMAC_INT_TX_ERR: Transmit Error - * - EMAC_INT_TX_FIN: Transmit descriptor finish - * - EMAC_INT_TX_DONE: Transmit Done - * - EMAC_INT_SOFT_INT: Software interrupt - * - EMAC_INT_WAKEUP: Wakeup interrupt - * @param[in] NewState New State of this function, should be: - * - ENABLE. - * - DISABLE. - * @return None - **********************************************************************/ -void EMAC_IntCmd(uint32_t ulIntType, FunctionalState NewState) -{ - if (NewState == ENABLE) { - LPC_EMAC->IntEnable |= ulIntType; - } else { - LPC_EMAC->IntEnable &= ~(ulIntType); - } -} - -/*********************************************************************//** - * @brief Check whether if specified interrupt flag is set or not - * for each interrupt type in EMAC and clear interrupt pending - * if it is set. - * @param[in] ulIntType Interrupt Type, should be: - * - EMAC_INT_RX_OVERRUN: Receive Overrun - * - EMAC_INT_RX_ERR: Receive Error - * - EMAC_INT_RX_FIN: Receive Descriptor Finish - * - EMAC_INT_RX_DONE: Receive Done - * - EMAC_INT_TX_UNDERRUN: Transmit Under-run - * - EMAC_INT_TX_ERR: Transmit Error - * - EMAC_INT_TX_FIN: Transmit descriptor finish - * - EMAC_INT_TX_DONE: Transmit Done - * - EMAC_INT_SOFT_INT: Software interrupt - * - EMAC_INT_WAKEUP: Wakeup interrupt - * @return New state of specified interrupt (SET or RESET) - **********************************************************************/ -IntStatus EMAC_IntGetStatus(uint32_t ulIntType) -{ - if (LPC_EMAC->IntStatus & ulIntType) { - LPC_EMAC->IntClear = ulIntType; - return SET; - } else { - return RESET; - } -} - - -/*********************************************************************//** - * @brief Check whether if the current RxConsumeIndex is not equal to the - * current RxProduceIndex. - * @param[in] None - * @return TRUE if they're not equal, otherwise return FALSE - * - * Note: In case the RxConsumeIndex is not equal to the RxProduceIndex, - * it means there're available data has been received. They should be read - * out and released the Receive Data Buffer by updating the RxConsumeIndex value. - **********************************************************************/ -Bool EMAC_CheckReceiveIndex(void) -{ - if (LPC_EMAC->RxConsumeIndex != LPC_EMAC->RxProduceIndex) { - return TRUE; - } else { - return FALSE; - } -} - - -/*********************************************************************//** - * @brief Check whether if the current TxProduceIndex is not equal to the - * current RxProduceIndex - 1. - * @param[in] None - * @return TRUE if they're not equal, otherwise return FALSE - * - * Note: In case the RxConsumeIndex is equal to the RxProduceIndex - 1, - * it means the transmit buffer is available and data can be written to transmit - * buffer to be sent. - **********************************************************************/ -Bool EMAC_CheckTransmitIndex(void) -{ - uint32_t tmp = LPC_EMAC->TxConsumeIndex -1; - if (LPC_EMAC->TxProduceIndex == tmp) { - return FALSE; - } else { - return TRUE; - } -} - - -/*********************************************************************//** - * @brief Get current status value of receive data (due to RxConsumeIndex) - * @param[in] ulRxStatType Received Status type, should be one of following: - * - EMAC_RINFO_CTRL_FRAME: Control Frame - * - EMAC_RINFO_VLAN: VLAN Frame - * - EMAC_RINFO_FAIL_FILT: RX Filter Failed - * - EMAC_RINFO_MCAST: Multicast Frame - * - EMAC_RINFO_BCAST: Broadcast Frame - * - EMAC_RINFO_CRC_ERR: CRC Error in Frame - * - EMAC_RINFO_SYM_ERR: Symbol Error from PHY - * - EMAC_RINFO_LEN_ERR: Length Error - * - EMAC_RINFO_RANGE_ERR: Range error(exceeded max size) - * - EMAC_RINFO_ALIGN_ERR: Alignment error - * - EMAC_RINFO_OVERRUN: Receive overrun - * - EMAC_RINFO_NO_DESCR: No new Descriptor available - * - EMAC_RINFO_LAST_FLAG: last Fragment in Frame - * - EMAC_RINFO_ERR: Error Occurred (OR of all error) - * @return Current value of receive data (due to RxConsumeIndex) - **********************************************************************/ -FlagStatus EMAC_CheckReceiveDataStatus(uint32_t ulRxStatType) -{ - uint32_t idx; - idx = LPC_EMAC->RxConsumeIndex; - return (((Rx_Stat[idx].Info) & ulRxStatType) ? SET : RESET); -} - - -/*********************************************************************//** - * @brief Get size of current Received data in received buffer (due to - * RxConsumeIndex) - * @param[in] None - * @return Size of received data - **********************************************************************/ -uint32_t EMAC_GetReceiveDataSize(void) -{ - uint32_t idx; - idx =LPC_EMAC->RxConsumeIndex; - return ((Rx_Stat[idx].Info) & EMAC_RINFO_SIZE); -} - -/*********************************************************************//** - * @brief Increase the RxConsumeIndex (after reading the Receive buffer - * to release the Receive buffer) and wrap-around the index if - * it reaches the maximum Receive Number - * @param[in] None - * @return None - **********************************************************************/ -void EMAC_UpdateRxConsumeIndex(void) -{ - // Get current Rx consume index - uint32_t idx = LPC_EMAC->RxConsumeIndex; - - /* Release frame from EMAC buffer */ - if (++idx == EMAC_NUM_RX_FRAG) idx = 0; - LPC_EMAC->RxConsumeIndex = idx; -} - -/*********************************************************************//** - * @brief Increase the TxProduceIndex (after writting to the Transmit buffer - * to enable the Transmit buffer) and wrap-around the index if - * it reaches the maximum Transmit Number - * @param[in] None - * @return None - **********************************************************************/ -void EMAC_UpdateTxProduceIndex(void) -{ - // Get current Tx produce index - uint32_t idx = LPC_EMAC->TxProduceIndex; - - /* Start frame transmission */ - if (++idx == EMAC_NUM_TX_FRAG) idx = 0; - LPC_EMAC->TxProduceIndex = idx; -} - - -/** - * @} - */ - -#endif /* _EMAC */ - -/** - * @} - */ - -/* --------------------------------- End Of File ------------------------------ */ -#endif /* __LPC17XX__ */