GD32E503的固件庫包含在開發板Demo資料里，最新版本是V1.2.2：

添加GD32E503器件到MDK

GD32E50x的AddOn資源包，目前最新版本是1.3.3，如果還沒有安裝MDK需要先安裝一下MDK，這里不做過多表述，然后再安裝AddOn資源包內的兩個”.pack”文件(也可以只安裝E50x版本的)：

如下圖所示，MDK內的DeviceDatabase內能找到GD32E50x系列的器件列表，證明資源包安裝成功。

添加libraries

拷貝固件庫到BSP的libraries目錄內

解壓RTT源碼包和固件庫壓縮包，先拷貝固件庫的”GD32E50x_Firmware_Library”文件夾到RTT源碼包的”bsp/gd32/arm/libraries/“路徑下：

修改libraries目錄內的配置文件

這里可以看到libraries目錄下還有兩個配置文件“Kconfig”和“.ignore_format.yml”，Kconfig文件后面用menuconfig或RTthreadStudio IDE去配置肯定會用到，另外一個文件暫時不知道什么用途，但不妨一起修改了，Kconfig文件修改如下(文檔末尾添加GD32E5的配置信息)：

1configSOC_FAMILY_GD32 2bool 3configSOC_SERIES_GD32F1 4bool 5selectARCH_ARM_CORTEX_M3 6selectSOC_FAMILY_GD32 7configSOC_SERIES_GD32F2 8bool 9selectARCH_ARM_CORTEX_M3 10selectSOC_FAMILY_GD32 11configSOC_SERIES_GD32F3 12bool 13selectARCH_ARM_CORTEX_M4 14selectSOC_FAMILY_GD32 15configSOC_SERIES_GD32F4 16bool 17selectARCH_ARM_CORTEX_M4 18selectSOC_FAMILY_GD32 19configSOC_SERIES_GD32E5#addbycjl 20bool 21selectARCH_ARM_CORTEX_M33 22selectSOC_FAMILY_GD32

“.yml”文件把GD32E50x的固件庫路徑名添加到數組末尾：

1dir_path: 2-GD32F10x_Firmware_Library 3-GD32F20x_Firmware_Library 4-GD32F30x_Firmware_Library 5-GD32F4xx_Firmware_Library 6-GD32E50x_Firmware_Library

給固件庫添加SConscript構建配置文件

從其它固件庫文件內(我用的F4xx)拷貝一份”SConscript”文件到新加入的固件庫路徑內：

1importrtconfig 2frombuildingimport* 3#getcurrentdirectory 4cwd=GetCurrentDir() 5#ThesetofsourcefilesassociatedwiththisSConscriptfile. 6src=Split(''' 7CMSIS/GD/GD32E50x/Source/system_gd32e50x.c 8GD32E50x_standard_peripheral/Source/gd32e50x_gpio.c 9GD32E50x_standard_peripheral/Source/gd32e50x_rcu.c 10GD32E50x_standard_peripheral/Source/gd32e50x_exti.c 11GD32E50x_standard_peripheral/Source/gd32e50x_misc.c 12''') 13#remove:GD32E50x_standard_peripheral/Source/gd32e50x_syscfg.c 14ifGetDepend(['RT_USING_SERIAL']): 15src+=['GD32E50x_standard_peripheral/Source/gd32e50x_usart.c'] 16ifGetDepend(['RT_USING_I2C']): 17src+=['GD32E50x_standard_peripheral/Source/gd32e50x_i2c.c'] 18ifGetDepend(['RT_USING_SPI']): 19src+=['GD32E50x_standard_peripheral/Source/gd32e50x_spi.c'] 20ifGetDepend(['RT_USING_CAN']): 21src+=['GD32E50x_standard_peripheral/Source/gd32e50x_can.c'] 22ifGetDepend(['BSP_USING_ETH']): 23src+=['GD32E50x_standard_peripheral/Source/gd32e50x_enet.c'] 24ifGetDepend(['RT_USING_ADC']): 25src+=['GD32E50x_standard_peripheral/Source/gd32e50x_adc.c'] 26ifGetDepend(['RT_USING_DAC']): 27src+=['GD32E50x_standard_peripheral/Source/gd32e50x_dac.c'] 28ifGetDepend(['RT_USING_RTC']): 29src+=['GD32E50x_standard_peripheral/Source/gd32e50x_rtc.c'] 30src+=['GD32E50x_standard_peripheral/Source/gd32e50x_pmu.c'] 31ifGetDepend(['RT_USING_WDT']): 32src+=['GD32E50x_standard_peripheral/Source/gd32e50x_wwdgt.c'] 33src+=['GD32E50x_standard_peripheral/Source/gd32e50x_fwdgt.c'] 34ifGetDepend(['RT_USING_SDIO']): 35src+=['GD32E50x_standard_peripheral/Source/gd32e50x_sdio.c'] 36src+=['GD32E50x_standard_peripheral/Source/gd32e50x_dma.c'] 37path=[ 38cwd+'/CMSIS/GD/GD32E50x/Include', 39cwd+'/CMSIS', 40cwd+'/GD32E50x_standard_peripheral/Include',] 41CPPDEFINES=['USE_STDPERIPH_DRIVER'] 42group=DefineGroup('Libraries',src,depend=[''],CPPPATH=path,CPPDEFINES=CPPDEFINES) 43Return('group')

創建BSP

拷貝BSP模板

任意拷貝一份BSP文件夾（我同樣也是用的407）重命名為E503:

修改board.h頭文件

其中主要需要修改的內容都在board路徑下。先看board.h文件，我這里沒有做外部SDRAM，所以注釋掉相關定義，我板子實際焊的是GD32E503RCT6，所以SRAM大小改為96KB，再把相關頭文件名修改一下：

1#ifndef__BOARD_H__ 2#define__BOARD_H__ 3#include"gd32e50x.h" 4#include"drv_usart.h" 5#include"drv_gpio.h" 6#include"gd32e50x_exti.h" 7//#defineEXT_SDRAM_BEGIN(0xC0000000U)/*thebeginingaddressofexternalSDRAM*/ 8//#defineEXT_SDRAM_END(EXT_SDRAM_BEGIN+(32U*1024*1024))/*theendaddressofexternalSDRAM*/ 9//InternalSRAMmemorysize[Kbytes]<8-64> 10//Default:64 11#ifdef__ICCARM__ 12//Use*.icframsymbal,toavoidhardcode. 13externchar__ICFEDIT_region_RAM_end__; 14#defineGD32_SRAM_END&__ICFEDIT_region_RAM_end__ 15#else 16#defineGD32_SRAM_SIZE96//96forGD32E503xC128forGD32E503xE... 17#defineGD32_SRAM_END(0x20000000+GD32_SRAM_SIZE*1024) 18#endif 19#ifdef__ARMCC_VERSION 20externintImage$$RW_IRAM1$$ZI$$Limit; 21#defineHEAP_BEGIN(&Image$$RW_IRAM1$$ZI$$Limit) 22#elif__ICCARM__ 23#pragmasection="HEAP" 24#defineHEAP_BEGIN(__segment_end("HEAP")) 25#else 26externint__bss_end; 27#defineHEAP_BEGIN(&__bss_end) 28#endif 29#defineHEAP_ENDGD32_SRAM_END 30#endif