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在CMSIS-Driver提供的原始驱动基础上之加了复位功能，这个复位功能非常重要，否则运行阶段8720容易通信异常。
【非常重要的帖子，必读】
CMSIS-Driver驱动各种以太网PHY芯片，读取ID前建议加上软件复位
http://www.armbbs.cn/forum.php?mod=viewthread&tid=95709
这个驱动是在H7-TOOL的RTX5全家桶版上使用的。
 PHY_LAN8720.h
PHY_LAN8720.c
- /*
- * Copyright (c) 2013-2018 Arm Limited. All rights reserved.
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed under the Apache License, Version 2.0 (the License); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an AS IS BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * -----------------------------------------------------------------------
- *
- * $Date: 25. May 2018
- * $Revision: V6.2
- *
- * Driver: Driver_ETH_PHYn (default: Driver_ETH_PHY0)
- * Project: Ethernet Physical Layer Transceiver (PHY)
- * Driver for LAN8720
- * -----------------------------------------------------------------------
- * Use the following configuration settings in the middleware component
- * to connect to this driver.
- *
- * Configuration Setting Value
- * --------------------- -----
- * Connect to hardware via Driver_ETH_PHY# = n (default: 0)
- * -------------------------------------------------------------------- */
- /* History:
- * Version 6.2
- * Updated for ARM compiler 6
- * Version 6.1
- * Added driver flow control flags
- * Version 6.00
- * Based on API V2.00
- * Version 5.01
- * Based on API V1.10 (namespace prefix ARM_ added)
- * Version 5.00
- * Initial release
- */
- #include "PHY_LAN8720.h"
- #define ARM_ETH_PHY_DRV_VERSION ARM_DRIVER_VERSION_MAJOR_MINOR(6,2) /* driver version */
- #ifndef ETH_PHY_NUM
- #define ETH_PHY_NUM 0 /* Default driver number */
- #endif
- #ifndef ETH_PHY_ADDR
- #define ETH_PHY_ADDR 0x00 /* Default device address */
- #endif
- /* Driver Version */
- static const ARM_DRIVER_VERSION DriverVersion = {
- ARM_ETH_PHY_API_VERSION,
- ARM_ETH_PHY_DRV_VERSION
- };
- /* Ethernet PHY control structure */
- static PHY_CTRL PHY = { NULL, NULL, 0, 0, 0 };
- /**
- \fn ARM_DRIVER_VERSION GetVersion (void)
- \brief Get driver version.
- \return \ref ARM_DRIVER_VERSION
- */
- static ARM_DRIVER_VERSION GetVersion (void) {
- return DriverVersion;
- }
- /**
- \fn int32_t Initialize (ARM_ETH_PHY_Read_t fn_read,
- ARM_ETH_PHY_Write_t fn_write)
- \brief Initialize Ethernet PHY Device.
- \param[in] fn_read Pointer to \ref ARM_ETH_MAC_PHY_Read
- \param[in] fn_write Pointer to \ref ARM_ETH_MAC_PHY_Write
- \return \ref execution_status
- */
- static int32_t Initialize (ARM_ETH_PHY_Read_t fn_read, ARM_ETH_PHY_Write_t fn_write) {
- if ((fn_read == NULL) || (fn_write == NULL)) { return ARM_DRIVER_ERROR_PARAMETER; }
- if ((PHY.flags & PHY_INIT) == 0U) {
- /* Register PHY read/write functions. */
- PHY.reg_rd = fn_read;
- PHY.reg_wr = fn_write;
- PHY.bmcr = 0U;
- PHY.flags = PHY_INIT;
- }
- return ARM_DRIVER_OK;
- }
- /**
- \fn int32_t Uninitialize (void)
- \brief De-initialize Ethernet PHY Device.
- \return \ref execution_status
- */
- static int32_t Uninitialize (void) {
- PHY.reg_rd = NULL;
- PHY.reg_wr = NULL;
- PHY.bmcr = 0U;
- PHY.flags = 0U;
- return ARM_DRIVER_OK;
- }
- /**
- \fn int32_t PowerControl (ARM_POWER_STATE state)
- \brief Control Ethernet PHY Device Power.
- \param[in] state Power state
- \return \ref execution_status
- */
- static int32_t PowerControl (ARM_POWER_STATE state) {
- uint16_t val;
- switch ((int32_t)state) {
- case ARM_POWER_OFF:
- if ((PHY.flags & PHY_INIT) == 0U) {
- /* Initialize must provide register access function pointers */
- return ARM_DRIVER_ERROR;
- }
- PHY.flags &= ~PHY_POWER;
- PHY.bmcr = BMCR_POWER_DOWN;
- return (PHY.reg_wr(ETH_PHY_ADDR, REG_BMCR, PHY.bmcr));
- case ARM_POWER_FULL:
- if ((PHY.flags & PHY_INIT) == 0U) {
- return ARM_DRIVER_ERROR;
- }
- if (PHY.flags & PHY_POWER) {
- return ARM_DRIVER_OK;
- }
-
- {
- uint32_t tout;
-
- PHY.reg_wr(ETH_PHY_ADDR, REG_BMCR, BMCR_RESET);
- for (tout = 0; tout < 0x10000; tout++)
- {
- PHY.reg_rd(ETH_PHY_ADDR, REG_BMCR, &val);
- if (!(val & 0x8000))
- {
- break;
- }
- }
-
- }
-
- /* Check Device Identification. */
- PHY.reg_rd(ETH_PHY_ADDR, REG_PHYIDR1, &val);
- if (val != PHY_ID1) {
- /* Invalid PHY ID */
- return ARM_DRIVER_ERROR_UNSUPPORTED;
- }
- PHY.reg_rd(ETH_PHY_ADDR, REG_PHYIDR2, &val);
- if ((val & 0xFFF0) != PHY_ID2) {
- /* Invalid PHY ID */
- return ARM_DRIVER_ERROR_UNSUPPORTED;
- }
- PHY.bmcr = 0U;
- if (PHY.reg_wr(ETH_PHY_ADDR, REG_BMCR, PHY.bmcr) != ARM_DRIVER_OK) {
- return ARM_DRIVER_ERROR;
- }
- PHY.flags |= PHY_POWER;
- return ARM_DRIVER_OK;
- case ARM_POWER_LOW:
- default:
- return ARM_DRIVER_ERROR_UNSUPPORTED;
- }
- }
- /**
- \fn int32_t SetInterface (uint32_t interface)
- \brief Set Ethernet Media Interface.
- \param[in] interface Media Interface type
- \return \ref execution_status
- */
- static int32_t SetInterface (uint32_t interface) {
- if ((PHY.flags & PHY_POWER) == 0U) { return ARM_DRIVER_ERROR; }
- switch (interface) {
- case ARM_ETH_INTERFACE_RMII:
- break;
- case ARM_ETH_INTERFACE_MII:
- default:
- return ARM_DRIVER_ERROR_UNSUPPORTED;
- }
- return(0);
- }
- /**
- \fn int32_t SetMode (uint32_t mode)
- \brief Set Ethernet PHY Device Operation mode.
- \param[in] mode Operation Mode
- \return \ref execution_status
- */
- static int32_t SetMode (uint32_t mode) {
- uint16_t val;
- if ((PHY.flags & PHY_POWER) == 0U) { return ARM_DRIVER_ERROR; }
- val = PHY.bmcr & BMCR_POWER_DOWN;
- switch (mode & ARM_ETH_PHY_SPEED_Msk) {
- case ARM_ETH_PHY_SPEED_10M:
- break;
- case ARM_ETH_PHY_SPEED_100M:
- val |= BMCR_SPEED_SEL;
- break;
- default:
- return ARM_DRIVER_ERROR_UNSUPPORTED;
- }
- switch (mode & ARM_ETH_PHY_DUPLEX_Msk) {
- case ARM_ETH_PHY_DUPLEX_HALF:
- break;
- case ARM_ETH_PHY_DUPLEX_FULL:
- val |= BMCR_DUPLEX;
- break;
- }
- if (mode & ARM_ETH_PHY_AUTO_NEGOTIATE) {
- val |= BMCR_ANEG_EN;
- }
- if (mode & ARM_ETH_PHY_LOOPBACK) {
- val |= BMCR_LOOPBACK;
- }
- if (mode & ARM_ETH_PHY_ISOLATE) {
- val |= BMCR_ISOLATE;
- }
- PHY.bmcr = val;
- return (PHY.reg_wr(ETH_PHY_ADDR, REG_BMCR, PHY.bmcr));
- }
- /**
- \fn ARM_ETH_LINK_STATE GetLinkState (void)
- \brief Get Ethernet PHY Device Link state.
- \return current link status \ref ARM_ETH_LINK_STATE
- */
- static ARM_ETH_LINK_STATE GetLinkState (void) {
- ARM_ETH_LINK_STATE state;
- uint16_t val = 0U;
- if (PHY.flags & PHY_POWER) {
- PHY.reg_rd(ETH_PHY_ADDR, REG_BMSR, &val);
- }
- state = (val & BMSR_LINK_STAT) ? ARM_ETH_LINK_UP : ARM_ETH_LINK_DOWN;
- return (state);
- }
- /**
- \fn ARM_ETH_LINK_INFO GetLinkInfo (void)
- \brief Get Ethernet PHY Device Link information.
- \return current link parameters \ref ARM_ETH_LINK_INFO
- */
- static ARM_ETH_LINK_INFO GetLinkInfo (void) {
- ARM_ETH_LINK_INFO info;
- uint16_t val = 0U;
- if (PHY.flags & PHY_POWER) {
- PHY.reg_rd(ETH_PHY_ADDR, REG_PSCSR, &val);
- }
- info.speed = (val & PSCSR_SPEED) ? ARM_ETH_SPEED_10M : ARM_ETH_SPEED_100M;
- info.duplex = (val & PSCSR_DUPLEX) ? ARM_ETH_DUPLEX_FULL : ARM_ETH_DUPLEX_HALF;
- return (info);
- }
- /* PHY Driver Control Block */
- extern
- ARM_DRIVER_ETH_PHY ARM_Driver_ETH_PHY_(ETH_PHY_NUM);
- ARM_DRIVER_ETH_PHY ARM_Driver_ETH_PHY_(ETH_PHY_NUM) = {
- GetVersion,
- Initialize,
- Uninitialize,
- PowerControl,
- SetInterface,
- SetMode,
- GetLinkState,
- GetLinkInfo
- };
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发表于 2020-4-14 11:10:56
发表于 2020-9-25 10:57:06
楼主
