Micropython开发篇三–基于F411 CE的移植编译
最近在学操作系统(RTOS与Linux)，对Micropython有些新的认知；回头又复习了一下Micropython,简直要不要这么优秀,希望通过这篇文章能带给大家不一样的Micropython。
Micropython是什么？
Micro Python运行在微控制器上的Python。遵守MIT协议。由剑桥大学的理论物理学家乔治·达明设计。
Micropython原理是怎样的？
以基于STM32的RTOS为例，在STM32学习时，通常会接触到3种编译方法：寄存器，标准库以及Hal库，Micropython使用Hal库；谈到Hal库,就不得不说到CubeMX。CubeMX来源于ST公司，ST公司把对应芯片对应功能的Hal库文件及头文件封装好，在使用CubeMX时生成工程模板(其实就是对应功能及库是否会被调用，通过一个Halconfig配置文件可以联系起整个底层函数。
Micropython使用的就是相同机制,Micropython利用stm32f4xx_hal_conf.h（Hal配置文件）,配置工程模板就已经有了，可以利用自己的OS解析文件,进而对底层IO进行操作。
hal配置文件主要配置以下功能:
1.GPIO 复用功能 如ADC,DAC,IIC,UART,CAN,SPI,TIM,USB；
2.内部功能配置 如DMA,RNG,PWR，WDG；
3.晶振,RTC；
4.Flash支持,网络配置 ，
Hal库具备文件系统,USB等功能,那么对应的OS只需要调用相应的功能即可。
micropython-master\py目录是最核心的发动机，也就是MicroPython的实现，C语言实现的python的解析器，运行时，虚拟机组建。因此针对不同的板子甚至可以使用相同的代码驱动,因为代码都会被Micropython的虚拟机解释并执行(类似于A电脑虚拟机上装了个APP,，B电脑只需安装虚拟机，只需打开A虚拟机的文件就可以使用相同的APP)
以下为F411CE对应stm32f4xx_hal_conf.h（为方便理解我已经做了简单注释）：
/**
******************************************************************************
* @file stm32f4xx_hal_conf.h
* @author MCD Application Team
* @version V1.1.0
* @date 19-June-2014
* @brief HAL configuration file.
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32F4xx_HAL_CONF_H
#define __STM32F4xx_HAL_CONF_H
#ifdef __cplusplus
extern "C" {
#endif
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* ########################## 功能选择 ############################## */
/**
* @brief This is the list of modules to be used in the HAL driver
*/
#define HAL_MODULE_ENABLED
#define HAL_ADC_MODULE_ENABLED //ADC使能
#define HAL_CAN_MODULE_ENABLED //CAN使能
/* #define HAL_CRC_MODULE_ENABLED */
/* #define HAL_CRYP_MODULE_ENABLED */
/* #define HAL_DAC_MODULE_ENABLED */
/* #define HAL_DCMI_MODULE_ENABLED */
#define HAL_DMA_MODULE_ENABLED //DMA使能
/* #define HAL_DMA2D_MODULE_ENABLED */
/* #define HAL_ETH_MODULE_ENABLED */
#define HAL_FLASH_MODULE_ENABLED //内部Flash使能
/* #define HAL_NAND_MODULE_ENABLED */
/* #define HAL_NOR_MODULE_ENABLED */
/* #define HAL_PCCARD_MODULE_ENABLED */
/* #define HAL_SRAM_MODULE_ENABLED */
/* #define HAL_SDRAM_MODULE_ENABLED */
/* #define HAL_HASH_MODULE_ENABLED */
#define HAL_GPIO_MODULE_ENABLED //GPIO使能
#define HAL_I2C_MODULE_ENABLED //IIC使能
/* #define HAL_I2S_MODULE_ENABLED */
/* #define HAL_IWDG_MODULE_ENABLED */
/* #define HAL_LTDC_MODULE_ENABLED */
#define HAL_PWR_MODULE_ENABLED //电源管理使能
#define HAL_RCC_MODULE_ENABLED
#define HAL_RNG_MODULE_ENABLED //随机数发生器使能
#define HAL_RTC_MODULE_ENABLED
/* #define HAL_SAI_MODULE_ENABLED */
#define HAL_SD_MODULE_ENABLED //SD卡功能使能
#define HAL_SPI_MODULE_ENABLED //SPI功能使能
#define HAL_TIM_MODULE_ENABLED
#define HAL_UART_MODULE_ENABLED
/* #define HAL_USART_MODULE_ENABLED */
/* #define HAL_IRDA_MODULE_ENABLED */
/* #define HAL_SMARTCARD_MODULE_ENABLED */
/* #define HAL_WWDG_MODULE_ENABLED */
#define HAL_CORTEX_MODULE_ENABLED
#define HAL_PCD_MODULE_ENABLED
/* #define HAL_HCD_MODULE_ENABLED */
/* ########################## 时钟树配置 ##################### */
/**
* @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)100U) /*!< Time out for HSE start up, in ms */
#endif /* HSE_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 */
#if !defined (LSE_STARTUP_TIMEOUT)
#define LSE_STARTUP_TIMEOUT ((uint32_t)5000U) /*!< Time out for LSE start up, in ms */
#endif /* LSE_STARTUP_TIMEOUT */
/**
* @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. */
/* ########################### 系统配置 ######################### */
/**
* @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)0x00) /*!< tick interrupt priority */
#define USE_RTOS 0
#define PREFETCH_ENABLE 1
#define INSTRUCTION_CACHE_ENABLE 1
#define DATA_CACHE_ENABLE 1
/* ########################## Assert Selection ############################## */
/**
* @brief Uncomment the line below to expanse the "assert_param" macro in the
* HAL drivers code
*/
/* #define USE_FULL_ASSERT 1 */
/* ################## 网络配置 ##################### */
/* 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 */
/* Includes ------------------------------------------------------------------*/
/**
* @brief Include module's header file
*/
#ifdef HAL_RCC_MODULE_ENABLED
#include "stm32f4xx_hal_rcc.h"
#endif /* HAL_RCC_MODULE_ENABLED */
#ifdef HAL_GPIO_MODULE_ENABLED
#include "stm32f4xx_hal_gpio.h"
#endif /* HAL_GPIO_MODULE_ENABLED */
#ifdef HAL_DMA_MODULE_ENABLED
#include "stm32f4xx_hal_dma.h"
#endif /* HAL_DMA_MODULE_ENABLED */
#ifdef HAL_CORTEX_MODULE_ENABLED
#include "stm32f4xx_hal_cortex.h"
#endif /* HAL_CORTEX_MODULE_ENABLED */
#ifdef HAL_ADC_MODULE_ENABLED
#include "stm32f4xx_hal_adc.h"
#endif /* HAL_ADC_MODULE_ENABLED */
#ifdef HAL_CAN_MODULE_ENABLED
#include "stm32f4xx_hal_can.h"
#endif /* HAL_CAN_MODULE_ENABLED */
#ifdef HAL_CRC_MODULE_ENABLED
#include "stm32f4xx_hal_crc.h"
#endif /* HAL_CRC_MODULE_ENABLED */
#ifdef HAL_CRYP_MODULE_ENABLED
#include "stm32f4xx_hal_cryp.h"
#endif /* HAL_CRYP_MODULE_ENABLED */
#ifdef HAL_DMA2D_MODULE_ENABLED
#include "stm32f4xx_hal_dma2d.h"
#endif /* HAL_DMA2D_MODULE_ENABLED */
#ifdef HAL_DAC_MODULE_ENABLED
#include "stm32f4xx_hal_dac.h"
#endif /* HAL_DAC_MODULE_ENABLED */
#ifdef HAL_DCMI_MODULE_ENABLED
#include "stm32f4xx_hal_dcmi.h"
#endif /* HAL_DCMI_MODULE_ENABLED */
#ifdef HAL_ETH_MODULE_ENABLED
#include "stm32f4xx_hal_eth.h"
#endif /* HAL_ETH_MODULE_ENABLED */
#ifdef HAL_FLASH_MODULE_ENABLED
#include "stm32f4xx_hal_flash.h"
#endif /* HAL_FLASH_MODULE_ENABLED */
#ifdef HAL_SRAM_MODULE_ENABLED
#include "stm32f4xx_hal_sram.h"
#endif /* HAL_SRAM_MODULE_ENABLED */
#ifdef HAL_NOR_MODULE_ENABLED
#include "stm32f4xx_hal_nor.h"
#endif /* HAL_NOR_MODULE_ENABLED */
#ifdef HAL_NAND_MODULE_ENABLED
#include "stm32f4xx_hal_nand.h"
#endif /* HAL_NAND_MODULE_ENABLED */
#ifdef HAL_PCCARD_MODULE_ENABLED
#include "stm32f4xx_hal_pccard.h"
#endif /* HAL_PCCARD_MODULE_ENABLED */
#ifdef HAL_SDRAM_MODULE_ENABLED
#include "stm32f4xx_hal_sdram.h"
#endif /* HAL_SDRAM_MODULE_ENABLED */
#ifdef HAL_HASH_MODULE_ENABLED
#include "stm32f4xx_hal_hash.h"
#endif /* HAL_HASH_MODULE_ENABLED */
#ifdef HAL_I2C_MODULE_ENABLED
#include "stm32f4xx_hal_i2c.h"
#endif /* HAL_I2C_MODULE_ENABLED */
#ifdef HAL_I2S_MODULE_ENABLED
#include "stm32f4xx_hal_i2s.h"
#endif /* HAL_I2S_MODULE_ENABLED */
#ifdef HAL_IWDG_MODULE_ENABLED
#include "stm32f4xx_hal_iwdg.h"
#endif /* HAL_IWDG_MODULE_ENABLED */
#ifdef HAL_LTDC_MODULE_ENABLED
#include "stm32f4xx_hal_ltdc.h"
#endif /* HAL_LTDC_MODULE_ENABLED */
#ifdef HAL_PWR_MODULE_ENABLED
#include "stm32f4xx_hal_pwr.h"
#endif /* HAL_PWR_MODULE_ENABLED */
#ifdef HAL_RNG_MODULE_ENABLED
#include "stm32f4xx_hal_rng.h"
#endif /* HAL_RNG_MODULE_ENABLED */
#ifdef HAL_RTC_MODULE_ENABLED
#include "stm32f4xx_hal_rtc.h"
#endif /* HAL_RTC_MODULE_ENABLED */
#ifdef HAL_SAI_MODULE_ENABLED
#include "stm32f4xx_hal_sai.h"
#endif /* HAL_SAI_MODULE_ENABLED */
#ifdef HAL_SD_MODULE_ENABLED
#include "stm32f4xx_hal_sd.h"
#endif /* HAL_SD_MODULE_ENABLED */
#ifdef HAL_SPI_MODULE_ENABLED
#include "stm32f4xx_hal_spi.h"
#endif /* HAL_SPI_MODULE_ENABLED */
#ifdef HAL_TIM_MODULE_ENABLED
#include "stm32f4xx_hal_tim.h"
#endif /* HAL_TIM_MODULE_ENABLED */
#ifdef HAL_UART_MODULE_ENABLED
#include "stm32f4xx_hal_uart.h"
#endif /* HAL_UART_MODULE_ENABLED */
#ifdef HAL_USART_MODULE_ENABLED
#include "stm32f4xx_hal_usart.h"
#endif /* HAL_USART_MODULE_ENABLED */
#ifdef HAL_IRDA_MODULE_ENABLED
#include "stm32f4xx_hal_irda.h"
#endif /* HAL_IRDA_MODULE_ENABLED */
#ifdef HAL_SMARTCARD_MODULE_ENABLED
#include "stm32f4xx_hal_smartcard.h"
#endif /* HAL_SMARTCARD_MODULE_ENABLED */
#ifdef HAL_WWDG_MODULE_ENABLED
#include "stm32f4xx_hal_wwdg.h"
#endif /* HAL_WWDG_MODULE_ENABLED */
#ifdef HAL_PCD_MODULE_ENABLED
#include "stm32f4xx_hal_pcd.h"
#endif /* HAL_PCD_MODULE_ENABLED */
#ifdef HAL_HCD_MODULE_ENABLED
#include "stm32f4xx_hal_hcd.h"
#endif /* HAL_HCD_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)0)
#endif /* USE_FULL_ASSERT */
#ifdef __cplusplus
}
#endif
#endif /* __STM32F4xx_HAL_CONF_H */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
下边再简单介绍下mpconfigboard.h（为方便理解我已经做了简单注释）：
#define MICROPY_HW_BOARD_NAME "Lisa" // 可修改为自己名称
#define MICROPY_HW_MCU_NAME "STM32F411CE"
/* 启用 THREAD */
#define MICROPY_PY_THREAD (1)
/* 这里用于对Flash存储芯片初始化,实现"U"盘功能*/
#define MICROPY_BOARD_EARLY_INIT WeAct_Core_board_early_init
void WeAct_Core_board_early_init(void);
/* BOARD Ver 2.0 set 1 ，other set 0 ex.V1.3,V2.1,V3.0 */
#define VERSION_V20 (1)
/* 使用内置flash改0 使用外置flash改1 */
/* Use the built-in flash to change to 0
use the external flash to change to 1 */
#define MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE (1)
/* 功能配置 */
#define MICROPY_HW_HAS_SWITCH (1)
#define MICROPY_HW_HAS_FLASH (1)
#define MICROPY_HW_ENABLE_RTC (1)
#define MICROPY_HW_ENABLE_USB (1)
#define MICROPY_HW_ENABLE_ADC (1)
#define MICROPY_HW_ENABLE_SERVO (1)
#define MICROPY_HW_ENABLE_SDCARD (0)
#define MICROPY_HW_ENABLE_RNG (0)
#define MICROPY_HW_ENABLE_DAC (0)
/* 时钟树配置板子使用的是25M晶振*/
// HSE is 25MHz, CPU freq set to 96MHz
#define MICROPY_HW_CLK_PLLM (25)
#define MICROPY_HW_CLK_PLLN (192)
#define MICROPY_HW_CLK_PLLP (RCC_PLLP_DIV2)
#define MICROPY_HW_CLK_PLLQ (4)
// UART 配置
#define MICROPY_HW_UART1_TX (pin_A9)
#define MICROPY_HW_UART1_RX (pin_A10)
#define MICROPY_HW_UART2_TX (pin_A2)
#define MICROPY_HW_UART2_RX (pin_A3)
#define MICROPY_HW_UART_REPL PYB_UART_1
#define MICROPY_HW_UART_REPL_BAUD 115200
// I2C 配置
#define MICROPY_HW_I2C1_SCL (pin_B6) // Arduino D15, pin 3 on CN10
#define MICROPY_HW_I2C1_SDA (pin_B7) // D14, pin 5 on CN10
#define MICROPY_HW_I2C2_SCL (pin_B10) // Arduino D6, pin 25 on CN10
#define MICROPY_HW_I2C2_SDA (pin_B9) // Arduino D3, pin 31 on CN10
#define MICROPY_HW_I2C3_SCL (pin_A8) // Arduino D7, pin 23 on CN10
#define MICROPY_HW_I2C3_SDA (pin_B8) // pin 1 on CN10
// SPI 配置
#define MICROPY_HW_SPI1_NSS (pin_A4) // pin 17 on CN7
#define MICROPY_HW_SPI1_SCK (pin_A5) // Arduino D13, pin 11 on CN10
#define MICROPY_HW_SPI1_MISO (pin_A6) // Arduino D12, pin 13 on CN10
#define MICROPY_HW_SPI1_MOSI (pin_A7) // Arduino D11, pin 15 on CN10
#define MICROPY_HW_SPI2_NSS (pin_B12) // pin 16 on CN10
#define MICROPY_HW_SPI2_SCK (pin_B13) // pin 30 on CN10
#define MICROPY_HW_SPI2_MISO (pin_B14) // pin 28 on CN10
#define MICROPY_HW_SPI2_MOSI (pin_B15) // pin 26 on CN10
#define MICROPY_HW_SPI3_NSS (pin_A15) // Arduino A2, pin 32 on CN7
#define MICROPY_HW_SPI3_SCK (pin_B3) // Arduino D3, pin 31 on CN10
#define MICROPY_HW_SPI3_MISO (pin_B4) // Arduino D5, pin 27 on CN10
#define MICROPY_HW_SPI3_MOSI (pin_B5) // Arduino D4, pin 29 on CN10
// 按键配置 低电平有效,软件上拉
#define MICROPY_HW_USRSW_PIN (pin_A0)
#define MICROPY_HW_USRSW_PULL (GPIO_PULLUP)
#define MICROPY_HW_USRSW_EXTI_MODE (GPIO_MODE_IT_RISING)
#define MICROPY_HW_USRSW_PRESSED (0)
// LED配置
#define MICROPY_HW_LED1 (pin_C13) // Blue C13 LED on board
#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_low(pin))
#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_high(pin))
// The pyboard has a 32.768kHz crystal for the RTC配置
#define MICROPY_HW_RTC_USE_LSE (1)
#define MICROPY_HW_RTC_USE_US (0)
#define MICROPY_HW_RTC_USE_CALOUT (1)
// use external SPI flash for storage
// 容量大小定义 单位：Mbit
// 4MB Flash 32Mbit
// 8MB Flash 64Mbit
// 16MB Flash 128Mbit
/* 这里板子默认使用25Q32，因个人喜好,改了个25Q128 IO如下：*/
/* PA4-CS,PA5-SCK,PB4-MISO,PA7-MOSI可根据个人板子修改*/
#define MICROPY_HW_SPIFLASH_SIZE_BITS (128 * 1024 * 1024) // 16MB Flash 128Mbit
#define MICROPY_HW_SPIFLASH_CS (pin_A4)
#define MICROPY_HW_SPIFLASH_SCK (pin_A5)
#if VERSION_V20
#define MICROPY_HW_SPIFLASH_MISO (pin_B4)
#else
#define MICROPY_HW_SPIFLASH_MISO (pin_A6)
#endif
#define MICROPY_HW_SPIFLASH_MOSI (pin_A7)
// 使用外置spi flash初始化
#if MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE
extern const struct _mp_spiflash_config_t spiflash_config;
extern struct _spi_bdev_t spi_bdev;
#define MICROPY_HW_BDEV_IOCTL(op, arg) ( \
(op) == BDEV_IOCTL_NUM_BLOCKS ? (MICROPY_HW_SPIFLASH_SIZE_BITS / 8 / FLASH_BLOCK_SIZE) : \
(op) == BDEV_IOCTL_INIT ? spi_bdev_ioctl(&spi_bdev, (op), (uint32_t)&spiflash_config) : \
spi_bdev_ioctl(&spi_bdev, (op), (arg)) \
)
#define MICROPY_HW_BDEV_READBLOCKS(dest, bl, n) spi_bdev_readblocks(&spi_bdev, (dest), (bl), (n))
#define MICROPY_HW_BDEV_WRITEBLOCKS(src, bl, n) spi_bdev_writeblocks(&spi_bdev, (src), (bl), (n))
#endif
// USB config
#define MICROPY_HW_USB_FS (1)
#define MICROPY_HW_FLASH_FS_LABEL "Lisa"
如果要实现Flash芯片挂载为PYB的U盘，还需要以下两个配置文件：
bdev.c：
#include "storage.h"
// External SPI flash uses standard SPI interface
STATIC const mp_soft_spi_obj_t soft_spi_bus = {
.delay_half = MICROPY_HW_SOFTSPI_MIN_DELAY,
.polarity = 0,
.phase = 0,
.sck = MICROPY_HW_SPIFLASH_SCK,
.mosi = MICROPY_HW_SPIFLASH_MOSI,
.miso = MICROPY_HW_SPIFLASH_MISO,
};
STATIC mp_spiflash_cache_t spi_bdev_cache;
const mp_spiflash_config_t spiflash_config = {
.bus_kind = MP_SPIFLASH_BUS_SPI,
.bus.u_spi.cs = MICROPY_HW_SPIFLASH_CS,
.bus.u_spi.data = (void*)&soft_spi_bus,
.bus.u_spi.proto = &mp_soft_spi_proto,
.cache = &spi_bdev_cache,
};
spi_bdev_t spi_bdev;
以及board_init.c：
#include "py/mphal.h"
void WeAct_Core_board_early_init(void) {
mp_hal_pin_output(pin_A4);
mp_hal_pin_write(pin_A4, 1);
}
根据自己的IO配置表（.CSV文件）mpconfigboard.mk如下：
```go
MCU_SERIES = f4
CMSIS_MCU = STM32F411xE
AF_FILE = boards/stm32f411_af.csv
LD_FILES = boards/stm32f411.ld boards/common_ifs.ld
TEXT0_ADDR = 0x08000000
TEXT1_ADDR = 0x08020000
CSV文件IO映射关系默认PA0-PA0，PA2-PA2，依次类推,当然也可以模仿PYB的定义为X1,X2,X3……Y1,Y2,Y3……
文件部分就介绍到这里；以下为Linux编译环境操作介绍：
将以上文件考入同一个文件夹如我的是“F411CELisa”,将文件夹复制到已经准备好的编译环境中（如Ubuntu下home/projects/micropythonports/stm32/boards下）
然后linux指令进入stm32文件夹
cd projects/micropython/ports/stm32/
输入编译指令：
make BOARD=F411CELisa -j
Linux将会生成对应的DFU及Hex文件，利用烧录工具烧录进板子，minipyb就做成了。
以下源文件及Hex文件如下：
链接：https://pan.baidu.com/s/19rR9PB3yUS9yYTkHw7PwfA
提取码：ag33
写文章不易，希望大家多多支持，接下来我会继续分享给大家一些有意思的项目代码。
