用最小代价引入HAL库

STM32 HAL库有其很好的优点,但是也有其很麻烦的缺点,对于简单的外设比如GPIO/SPI等等,可以使用LL库进行性能优化,对于SDMMC/ETH/SAI/DSI这些外设,不得不使用HAL库.直接操作寄存器是最不推荐的选择.要想以最小代价引入HAL库,浙江涉及到最后HAL_Init这个函数了.

函数的实体如下,但是,我们不应该执行这个函数,毕竟我们希望系统尽量还是LL库为主,而且HAL库有或多或少的AC6编译器不兼容问题,还有就是容易绑定在ST的平台.

HAL_StatusTypeDef HAL_Init(void)
{
  /* Configure Instruction cache through ART accelerator */ 
#if (ART_ACCLERATOR_ENABLE != 0)
   __HAL_FLASH_ART_ENABLE();
#endif /* ART_ACCLERATOR_ENABLE */

  /* Configure Flash prefetch */
#if (PREFETCH_ENABLE != 0U)
  __HAL_FLASH_PREFETCH_BUFFER_ENABLE();
#endif /* PREFETCH_ENABLE */

  /* Set Interrupt Group Priority */
  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);

  /* Use systick as time base source and configure 1ms tick (default clock after Reset is HSI) */
  HAL_InitTick(TICK_INT_PRIORITY);
  
  /* Init the low level hardware */
  HAL_MspInit();
  
  /* Return function status */
  return HAL_OK;
}

函数中最重要是HAL_InitTick,整个HAL库都依赖这个来进行,实际上他是一个毫秒中断,如果用到FreeRTOS,并且FreeRTOS绑定在SysTick,频率为1000Hz,则共享中断也未尝不可,所以引入HAL的最低代价就是实现HAL_InitTick的功能.所以第一步只要在中断中绑定HAL_IncTick即可.

第二步添加全局编译定义:USE_HAL_DRIVER

最后一步添加一个HAL的配置文件(stm32f7xx_hal_conf.h),从其他项目中复制一个过来,下面是一个最小配置.

/**
  ******************************************************************************
  * @file    stm32f7xx_hal_conf.h
  * @author  MCD Application Team
  * @brief   HAL configuration file. 
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */ 

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32F7xx_HAL_CONF_H
#define __STM32F7xx_HAL_CONF_H

#ifdef __cplusplus
 extern "C" {
#endif

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/

/* ########################## Module Selection ############################## */
/**
  * @brief This is the list of modules to be used in the HAL driver 
  */
#define HAL_MODULE_ENABLED  
#define HAL_RCC_MODULE_ENABLED 
#define HAL_FLASH_MODULE_ENABLED 
#define HAL_CORTEX_MODULE_ENABLED

/* ########################## HSE/HSI Values adaptation ##################### */
/**
  * @brief Adjust the value of External High Speed oscillator (HSE) used in your application.
  *        This value is used by the RCC HAL module to compute the system frequency
  *        (when HSE is used as system clock source, directly or through the PLL).  
  */
#if !defined  (HSE_VALUE) 
  #define HSE_VALUE    ((uint32_t)25000000) /*!< Value of the External oscillator in Hz */
#endif /* HSE_VALUE */

#if !defined  (HSE_STARTUP_TIMEOUT)
  #define HSE_STARTUP_TIMEOUT    ((uint32_t)100)   /*!< Time out for HSE start up, in ms */
#endif /* HSE_STARTUP_TIMEOUT */

#if !defined  (LSE_STARTUP_TIMEOUT)
  #define LSE_STARTUP_TIMEOUT    ((uint32_t)5000)   /*!< Time out for LSE start up, in ms */
#endif /* LSE_STARTUP_TIMEOUT */
   
/**
  * @brief Internal High Speed oscillator (HSI) value.
  *        This value is used by the RCC HAL module to compute the system frequency
  *        (when HSI is used as system clock source, directly or through the PLL). 
  */
#if !defined  (HSI_VALUE)
  #define HSI_VALUE    ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/
#endif /* HSI_VALUE */

/**
  * @brief Internal Low Speed oscillator (LSI) value.
  */
#if !defined  (LSI_VALUE) 
 #define LSI_VALUE  ((uint32_t)40000)    
#endif /* LSI_VALUE */                      /*!< Value of the Internal Low Speed oscillator in Hz
                                             The real value may vary depending on the variations
                                             in voltage and temperature.  */
/**
  * @brief External Low Speed oscillator (LSE) value.
  */
#if !defined  (LSE_VALUE)
 #define LSE_VALUE  ((uint32_t)32768)    /*!< Value of the External Low Speed oscillator in Hz */
#endif /* LSE_VALUE */

/**
  * @brief External clock source for I2S peripheral
  *        This value is used by the I2S HAL module to compute the I2S clock source 
  *        frequency, this source is inserted directly through I2S_CKIN pad. 
  */
#if !defined  (EXTERNAL_CLOCK_VALUE)
  #define EXTERNAL_CLOCK_VALUE    ((uint32_t)12288000) /*!< Value of the Internal oscillator in Hz*/
#endif /* EXTERNAL_CLOCK_VALUE */

/* Tip: To avoid modifying this file each time you need to use different HSE,
   ===  you can define the HSE value in your toolchain compiler preprocessor. */

/* ########################### System Configuration ######################### */
/**
  * @brief This is the HAL system configuration section
  */     
#define  VDD_VALUE                    ((uint32_t)3300) /*!< Value of VDD in mv */
#define  TICK_INT_PRIORITY            ((uint32_t)0x0F) /*!< tick interrupt priority */
#define  USE_RTOS                     0
#define  ART_ACCLERATOR_ENABLE        1 /* To enable instruction cache and prefetch */

#define  USE_HAL_ADC_REGISTER_CALLBACKS         0U /* ADC register callback disabled       */
#define  USE_HAL_CAN_REGISTER_CALLBACKS         0U /* CAN register callback disabled       */
#define  USE_HAL_CEC_REGISTER_CALLBACKS         0U /* CEC register callback disabled       */
#define  USE_HAL_CRYP_REGISTER_CALLBACKS        0U /* CRYP register callback disabled      */
#define  USE_HAL_DAC_REGISTER_CALLBACKS         0U /* DAC register callback disabled       */
#define  USE_HAL_DCMI_REGISTER_CALLBACKS        0U /* DCMI register callback disabled      */
#define  USE_HAL_DFSDM_REGISTER_CALLBACKS       0U /* DFSDM register callback disabled     */
#define  USE_HAL_DMA2D_REGISTER_CALLBACKS       0U /* DMA2D register callback disabled     */
#define  USE_HAL_DSI_REGISTER_CALLBACKS         0U /* DSI register callback disabled       */
#define  USE_HAL_ETH_REGISTER_CALLBACKS         0U /* ETH register callback disabled       */
#define  USE_HAL_HASH_REGISTER_CALLBACKS        0U /* HASH register callback disabled      */
#define  USE_HAL_HCD_REGISTER_CALLBACKS         0U /* HCD register callback disabled       */
#define  USE_HAL_I2C_REGISTER_CALLBACKS         0U /* I2C register callback disabled       */
#define  USE_HAL_I2S_REGISTER_CALLBACKS         0U /* I2S register callback disabled       */
#define  USE_HAL_IRDA_REGISTER_CALLBACKS        0U /* IRDA register callback disabled      */
#define  USE_HAL_JPEG_REGISTER_CALLBACKS        0U /* JPEG register callback disabled      */
#define  USE_HAL_LPTIM_REGISTER_CALLBACKS       0U /* LPTIM register callback disabled     */
#define  USE_HAL_LTDC_REGISTER_CALLBACKS        0U /* LTDC register callback disabled      */
#define  USE_HAL_MDIOS_REGISTER_CALLBACKS       0U /* MDIOS register callback disabled     */
#define  USE_HAL_MMC_REGISTER_CALLBACKS         0U /* MMC register callback disabled       */
#define  USE_HAL_NAND_REGISTER_CALLBACKS        0U /* NAND register callback disabled      */
#define  USE_HAL_NOR_REGISTER_CALLBACKS         0U /* NOR register callback disabled       */
#define  USE_HAL_PCD_REGISTER_CALLBACKS         0U /* PCD register callback disabled       */
#define  USE_HAL_QSPI_REGISTER_CALLBACKS        0U /* QSPI register callback disabled      */
#define  USE_HAL_RNG_REGISTER_CALLBACKS         0U /* RNG register callback disabled       */
#define  USE_HAL_RTC_REGISTER_CALLBACKS         0U /* RTC register callback disabled       */
#define  USE_HAL_SAI_REGISTER_CALLBACKS         0U /* SAI register callback disabled       */
#define  USE_HAL_SD_REGISTER_CALLBACKS          0U /* SD register callback disabled        */
#define  USE_HAL_SMARTCARD_REGISTER_CALLBACKS   0U /* SMARTCARD register callback disabled */
#define  USE_HAL_SDRAM_REGISTER_CALLBACKS       0U /* SDRAM register callback disabled     */
#define  USE_HAL_SRAM_REGISTER_CALLBACKS        0U /* SRAM register callback disabled      */
#define  USE_HAL_SPDIFRX_REGISTER_CALLBACKS     0U /* SPDIFRX register callback disabled   */
#define  USE_HAL_SMBUS_REGISTER_CALLBACKS       0U /* SMBUS register callback disabled     */
#define  USE_HAL_SPI_REGISTER_CALLBACKS         0U /* SPI register callback disabled       */
#define  USE_HAL_TIM_REGISTER_CALLBACKS         0U /* TIM register callback disabled       */
#define  USE_HAL_UART_REGISTER_CALLBACKS        0U /* UART register callback disabled      */
#define  USE_HAL_USART_REGISTER_CALLBACKS       0U /* USART register callback disabled     */
#define  USE_HAL_WWDG_REGISTER_CALLBACKS        0U /* WWDG register callback disabled      */

/* ########################## Assert Selection ############################## */
/**
  * @brief Uncomment the line below to expanse the "assert_param" macro in the 
  *        HAL drivers code
  */
/* #define USE_FULL_ASSERT    1 */

/* ################## Ethernet peripheral configuration ##################### */

/* Section 1 : Ethernet peripheral configuration */

/* MAC ADDRESS: MAC_ADDR0:MAC_ADDR1:MAC_ADDR2:MAC_ADDR3:MAC_ADDR4:MAC_ADDR5 */
#define MAC_ADDR0   2
#define MAC_ADDR1   0
#define MAC_ADDR2   0
#define MAC_ADDR3   0
#define MAC_ADDR4   0
#define MAC_ADDR5   0

/* Definition of the Ethernet driver buffers size and count */   
#define ETH_RX_BUF_SIZE                ETH_MAX_PACKET_SIZE /* buffer size for receive               */
#define ETH_TX_BUF_SIZE                ETH_MAX_PACKET_SIZE /* buffer size for transmit              */
#define ETH_RXBUFNB                    ((uint32_t)4)       /* 4 Rx buffers of size ETH_RX_BUF_SIZE  */
#define ETH_TXBUFNB                    ((uint32_t)4)       /* 4 Tx buffers of size ETH_TX_BUF_SIZE  */

/* Section 2: PHY configuration section */

/* DP83848 PHY Address*/ 
#define DP83848_PHY_ADDRESS             0x01
/* PHY Reset delay these values are based on a 1 ms Systick interrupt*/ 
#define PHY_RESET_DELAY                 ((uint32_t)0x000000FF)
/* PHY Configuration delay */
#define PHY_CONFIG_DELAY                ((uint32_t)0x00000FFF)

#define PHY_READ_TO                     ((uint32_t)0x0000FFFF)
#define PHY_WRITE_TO                    ((uint32_t)0x0000FFFF)

/* Section 3: Common PHY Registers */

#define PHY_BCR                         ((uint16_t)0x00)    /*!< Transceiver Basic Control Register   */
#define PHY_BSR                         ((uint16_t)0x01)    /*!< Transceiver Basic Status Register    */
 
#define PHY_RESET                       ((uint16_t)0x8000)  /*!< PHY Reset */
#define PHY_LOOPBACK                    ((uint16_t)0x4000)  /*!< Select loop-back mode */
#define PHY_FULLDUPLEX_100M             ((uint16_t)0x2100)  /*!< Set the full-duplex mode at 100 Mb/s */
#define PHY_HALFDUPLEX_100M             ((uint16_t)0x2000)  /*!< Set the half-duplex mode at 100 Mb/s */
#define PHY_FULLDUPLEX_10M              ((uint16_t)0x0100)  /*!< Set the full-duplex mode at 10 Mb/s  */
#define PHY_HALFDUPLEX_10M              ((uint16_t)0x0000)  /*!< Set the half-duplex mode at 10 Mb/s  */
#define PHY_AUTONEGOTIATION             ((uint16_t)0x1000)  /*!< Enable auto-negotiation function     */
#define PHY_RESTART_AUTONEGOTIATION     ((uint16_t)0x0200)  /*!< Restart auto-negotiation function    */
#define PHY_POWERDOWN                   ((uint16_t)0x0800)  /*!< Select the power down mode           */
#define PHY_ISOLATE                     ((uint16_t)0x0400)  /*!< Isolate PHY from MII                 */

#define PHY_AUTONEGO_COMPLETE           ((uint16_t)0x0020)  /*!< Auto-Negotiation process completed   */
#define PHY_LINKED_STATUS               ((uint16_t)0x0004)  /*!< Valid link established               */
#define PHY_JABBER_DETECTION            ((uint16_t)0x0002)  /*!< Jabber condition detected            */
  
/* Section 4: Extended PHY Registers */

#define PHY_SR                          ((uint16_t)0x10)    /*!< PHY status register Offset                      */
#define PHY_MICR                        ((uint16_t)0x11)    /*!< MII Interrupt Control Register                  */
#define PHY_MISR                        ((uint16_t)0x12)    /*!< MII Interrupt Status and Misc. Control Register */
 
#define PHY_LINK_STATUS                 ((uint16_t)0x0001)  /*!< PHY Link mask                                   */
#define PHY_SPEED_STATUS                ((uint16_t)0x0002)  /*!< PHY Speed mask                                  */
#define PHY_DUPLEX_STATUS               ((uint16_t)0x0004)  /*!< PHY Duplex mask                                 */

#define PHY_MICR_INT_EN                 ((uint16_t)0x0002)  /*!< PHY Enable interrupts                           */
#define PHY_MICR_INT_OE                 ((uint16_t)0x0001)  /*!< PHY Enable output interrupt events              */

#define PHY_MISR_LINK_INT_EN            ((uint16_t)0x0020)  /*!< Enable Interrupt on change of link status       */
#define PHY_LINK_INTERRUPT              ((uint16_t)0x2000)  /*!< PHY link status interrupt mask                  */

/* ################## SPI peripheral configuration ########################## */

/* CRC FEATURE: Use to activate CRC feature inside HAL SPI Driver
* Activated: CRC code is present inside driver
* Deactivated: CRC code cleaned from driver
*/

#define USE_SPI_CRC                     1U

/* Includes ------------------------------------------------------------------*/
/**
  * @brief Include module's header file 
  */

#ifdef HAL_RCC_MODULE_ENABLED
  #include "stm32f7xx_hal_rcc.h"
#endif /* HAL_RCC_MODULE_ENABLED */

#ifdef HAL_GPIO_MODULE_ENABLED
  #include "stm32f7xx_hal_gpio.h"
#endif /* HAL_GPIO_MODULE_ENABLED */

#ifdef HAL_DMA_MODULE_ENABLED
  #include "stm32f7xx_hal_dma.h"
#endif /* HAL_DMA_MODULE_ENABLED */
   
#ifdef HAL_CORTEX_MODULE_ENABLED
  #include "stm32f7xx_hal_cortex.h"
#endif /* HAL_CORTEX_MODULE_ENABLED */

#ifdef HAL_ADC_MODULE_ENABLED
  #include "stm32f7xx_hal_adc.h"
#endif /* HAL_ADC_MODULE_ENABLED */

#ifdef HAL_CAN_MODULE_ENABLED
  #include "stm32f7xx_hal_can.h"
#endif /* HAL_CAN_MODULE_ENABLED */

#ifdef HAL_CAN_LEGACY_MODULE_ENABLED
  #include "stm32f7xx_hal_can_legacy.h"
#endif /* HAL_CAN_LEGACY_MODULE_ENABLED */

#ifdef HAL_CEC_MODULE_ENABLED
  #include "stm32f7xx_hal_cec.h"
#endif /* HAL_CEC_MODULE_ENABLED */

#ifdef HAL_CRC_MODULE_ENABLED
  #include "stm32f7xx_hal_crc.h"
#endif /* HAL_CRC_MODULE_ENABLED */

#ifdef HAL_CRYP_MODULE_ENABLED
  #include "stm32f7xx_hal_cryp.h" 
#endif /* HAL_CRYP_MODULE_ENABLED */

#ifdef HAL_DMA2D_MODULE_ENABLED
  #include "stm32f7xx_hal_dma2d.h"
#endif /* HAL_DMA2D_MODULE_ENABLED */

#ifdef HAL_DAC_MODULE_ENABLED
  #include "stm32f7xx_hal_dac.h"
#endif /* HAL_DAC_MODULE_ENABLED */

#ifdef HAL_DCMI_MODULE_ENABLED
  #include "stm32f7xx_hal_dcmi.h"
#endif /* HAL_DCMI_MODULE_ENABLED */

#ifdef HAL_ETH_MODULE_ENABLED
  #include "stm32f7xx_hal_eth.h"
#endif /* HAL_ETH_MODULE_ENABLED */

#ifdef HAL_FLASH_MODULE_ENABLED
  #include "stm32f7xx_hal_flash.h"
#endif /* HAL_FLASH_MODULE_ENABLED */
 
#ifdef HAL_SRAM_MODULE_ENABLED
  #include "stm32f7xx_hal_sram.h"
#endif /* HAL_SRAM_MODULE_ENABLED */

#ifdef HAL_NOR_MODULE_ENABLED
  #include "stm32f7xx_hal_nor.h"
#endif /* HAL_NOR_MODULE_ENABLED */

#ifdef HAL_NAND_MODULE_ENABLED
  #include "stm32f7xx_hal_nand.h"
#endif /* HAL_NAND_MODULE_ENABLED */

#ifdef HAL_SDRAM_MODULE_ENABLED
  #include "stm32f7xx_hal_sdram.h"
#endif /* HAL_SDRAM_MODULE_ENABLED */      

#ifdef HAL_HASH_MODULE_ENABLED
 #include "stm32f7xx_hal_hash.h"
#endif /* HAL_HASH_MODULE_ENABLED */

#ifdef HAL_I2C_MODULE_ENABLED
 #include "stm32f7xx_hal_i2c.h"
#endif /* HAL_I2C_MODULE_ENABLED */

#ifdef HAL_I2S_MODULE_ENABLED
 #include "stm32f7xx_hal_i2s.h"
#endif /* HAL_I2S_MODULE_ENABLED */

#ifdef HAL_IWDG_MODULE_ENABLED
 #include "stm32f7xx_hal_iwdg.h"
#endif /* HAL_IWDG_MODULE_ENABLED */

#ifdef HAL_LPTIM_MODULE_ENABLED
 #include "stm32f7xx_hal_lptim.h"
#endif /* HAL_LPTIM_MODULE_ENABLED */

#ifdef HAL_LTDC_MODULE_ENABLED
 #include "stm32f7xx_hal_ltdc.h"
#endif /* HAL_LTDC_MODULE_ENABLED */

#ifdef HAL_PWR_MODULE_ENABLED
 #include "stm32f7xx_hal_pwr.h"
#endif /* HAL_PWR_MODULE_ENABLED */

#ifdef HAL_QSPI_MODULE_ENABLED
 #include "stm32f7xx_hal_qspi.h"
#endif /* HAL_QSPI_MODULE_ENABLED */

#ifdef HAL_RNG_MODULE_ENABLED
 #include "stm32f7xx_hal_rng.h"
#endif /* HAL_RNG_MODULE_ENABLED */

#ifdef HAL_RTC_MODULE_ENABLED
 #include "stm32f7xx_hal_rtc.h"
#endif /* HAL_RTC_MODULE_ENABLED */

#ifdef HAL_SAI_MODULE_ENABLED
 #include "stm32f7xx_hal_sai.h"
#endif /* HAL_SAI_MODULE_ENABLED */

#ifdef HAL_SD_MODULE_ENABLED
 #include "stm32f7xx_hal_sd.h"
#endif /* HAL_SD_MODULE_ENABLED */

#ifdef HAL_SPDIFRX_MODULE_ENABLED
 #include "stm32f7xx_hal_spdifrx.h"
#endif /* HAL_SPDIFRX_MODULE_ENABLED */

#ifdef HAL_SPI_MODULE_ENABLED
 #include "stm32f7xx_hal_spi.h"
#endif /* HAL_SPI_MODULE_ENABLED */

#ifdef HAL_TIM_MODULE_ENABLED
 #include "stm32f7xx_hal_tim.h"
#endif /* HAL_TIM_MODULE_ENABLED */

#ifdef HAL_UART_MODULE_ENABLED
 #include "stm32f7xx_hal_uart.h"
#endif /* HAL_UART_MODULE_ENABLED */

#ifdef HAL_USART_MODULE_ENABLED
 #include "stm32f7xx_hal_usart.h"
#endif /* HAL_USART_MODULE_ENABLED */

#ifdef HAL_IRDA_MODULE_ENABLED
 #include "stm32f7xx_hal_irda.h"
#endif /* HAL_IRDA_MODULE_ENABLED */

#ifdef HAL_SMARTCARD_MODULE_ENABLED
 #include "stm32f7xx_hal_smartcard.h"
#endif /* HAL_SMARTCARD_MODULE_ENABLED */

#ifdef HAL_WWDG_MODULE_ENABLED
 #include "stm32f7xx_hal_wwdg.h"
#endif /* HAL_WWDG_MODULE_ENABLED */

#ifdef HAL_PCD_MODULE_ENABLED
 #include "stm32f7xx_hal_pcd.h"
#endif /* HAL_PCD_MODULE_ENABLED */

#ifdef HAL_HCD_MODULE_ENABLED
 #include "stm32f7xx_hal_hcd.h"
#endif /* HAL_HCD_MODULE_ENABLED */

#ifdef HAL_DSI_MODULE_ENABLED
 #include "stm32f7xx_hal_dsi.h"
#endif /* HAL_DSI_MODULE_ENABLED */

#ifdef HAL_DFSDM_MODULE_ENABLED
 #include "stm32f7xx_hal_dfsdm.h"
#endif /* HAL_DFSDM_MODULE_ENABLED */
   
/* Exported macro ------------------------------------------------------------*/
#ifdef  USE_FULL_ASSERT
/**
  * @brief  The assert_param macro is used for function's parameters check.
  * @param  expr: If expr is false, it calls assert_failed function
  *         which reports the name of the source file and the source
  *         line number of the call that failed. 
  *         If expr is true, it returns no value.
  * @retval None
  */
  #define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))
/* Exported functions ------------------------------------------------------- */
  void assert_failed(uint8_t* file, uint32_t line);
#else
  #define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */


#ifdef __cplusplus
}
#endif

#endif /* __STM32F7xx_HAL_CONF_H */
 

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

现在可以调用一些以HAL编写的库了,但是,不管什么时候,尽量使用LL库效率会更高.

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