前言
个人比较熟悉rt-thread的开发，最近获取一块Mini-F5265-OB开发板，想在rt-thread的bsp里面支持mm32f5265的系列芯片的开发；然后就有后面的故事了。
环境配置及启动芯片
- Ubuntu20.04
env工具
官方有提供gcc的启动文件及链接文件，但移植到rt-thread的不能启动mm32f5265，然后修改了启动文件及链接文件；
启动文件修改的地方：.thumb_func .type Reset_Handler, %function .globl Reset_Handler .fnstart Reset_Handler: ldr sp, =_estack /* set stack pointer */ /* Copy the data segment initializers from flash to SRAM */ movs r1, #0 b LoopCopyDataInit CopyDataInit: ldr r3, =_sidata ldr r3, [r3, r1] str r3, [r0, r1] adds r1, r1, #4 LoopCopyDataInit: ldr r0, =_sdata ldr r3, =_edata adds r2, r0, r1 cmp r2, r3 bcc CopyDataInit ldr r2, =_sbss b LoopFillZerobss /* Zero fill the bss segment. */ FillZerobss: movs r3, #0 str r3, [r2], #4 LoopFillZerobss: ldr r3, = _ebss cmp r2, r3 bcc FillZerobss /* Call the clock system initialization function.*/ bl SystemInit /* Call static constructors */ bl __libc_init_array /* Call the application's entry point.*/ bl entry bx lr LoopForever: b LoopForever .fnend .size Reset_Handler, . - Reset_Handler链接文件主要修改的地方：
.text : { . = ALIGN(4); KEEP(*(.vectors)) . = ALIGN(4); *(.text) /* remaining code */ *(.text.*) /* remaining code */ *(.rodata) /* read-only data (constants) */ *(.rodata*) *(.glue_7) *(.glue_7t) *(.gnu.linkonce.t*) /* section information for finsh shell */ . = ALIGN(4); __fsymtab_start = .; KEEP(*(FSymTab)) __fsymtab_end = .; . = ALIGN(4); __vsymtab_start = .; KEEP(*(VSymTab)) __vsymtab_end = .; /* section information for initial. */ . = ALIGN(4); __rt_init_start = .; KEEP(*(SORT(.rti_fn*))) __rt_init_end = .; . = ALIGN(4); PROVIDE(__ctors_start__ = .); KEEP (*(SORT(.init_array.*))) KEEP (*(.init_array)) PROVIDE(__ctors_end__ = .); . = ALIGN(4); _etext = .; } > FLASH适配rt-thread的控制台，从隔壁的mm32f327x里面复制一份drv_uart.c文件过来，添加uart3的支持，根据Mini-F5265-OB开发板的原理图修改uart3的引脚；
，修改Kconfig文件；
编译及烧录
pkgs --update scons -j8编译的log如下：
CC build/packages/mm32/HAL_Lib/Src/hal_wwdg.o AS build/packages/mm32/System/startup_mm32f5260_gcc.o CC build/packages/mm32/System/system_mm32f526x.o LINK rtthread.elf Memory region Used Size Region Size %age Used FLASH: 83912 B 256 KB 32.01% RAM: 8656 B 112 KB 7.55% arm-none-eabi-objcopy -O binary rtthread.elf rtthread.bin arm-none-eabi-objcopy -O ihex rtthread.elf rtthread.hex arm-none-eabi-size rtthread.elf text data bss dec hex filename 83912 1988 6668 92568 16998 rtthread.elf scons: done building targets.使用pyocd工具进行烧录：
pyocd flash --erase chip --target MM32F5265E8PV --pack MindMotion.MM32F5260_DFP.0.2.0.pack rtthread.hex
运行效果
\ | /
- RT - Thread Operating System
/ | \ 5.2.0 build Jan 22 2025 11:45:14
2006 - 2024 Copyright by RT-Thread team
msh >
RT-Thread shell commands:
at24cxx - at24cxx eeprom function
adc - adc [option]
pin - pin [option]
clear - clear the terminal screen
version - show RT-Thread version information
list - list objects
help - RT-Thread shell help
ps - List threads in the system
free - Show the memory usage in the system
backtrace - print backtrace of a thread
msh >list de
device
msh >list device
device type ref count
-------- -------------------- ----------
i2c1 I2C Bus 0
adc1 ADC Device 0
uart3 Character Device 2
pin Pin Device 0
msh >结尾
应经移植了uart、ADC、pin设备，由于年末没有时间移植其他的外设，等待工作没有那么忙在弄了，提前祝大家新年快乐，万事如意！
工程仓库链接：https://github.com/Maihuanyi/...，后续会PR到rt-thread的官方仓库中，PR完成后这个链接将失效；
