mbed cliの使い方

mbed

プロジェクトの作り方

まず、mbed のオフライン環境でプロジェクトを作る。

$ mbed new F446_test

書き込みたいマイコンをつなぎmbed detectとすると検出される。

$ mbed detect
[mbed] Working path "/path/to/F446_test" (program)

[mbed] Detected NUCLEO_F446RE, port /dev/ttyACM0, mounted /path/to/NODE_F446RE, interface version 0221:
[mbed] Supported toolchains for NUCLEO_F446RE
| Target        | mbed OS 2 | mbed OS 5 |    uARM   |    IAR    |    ARM    |  GCC_ARM  | ARMC5 |
|---------------|-----------|-----------|-----------|-----------|-----------|-----------|-------|
| NUCLEO_F446RE | Supported | Supported | Supported | Supported | Supported | Supported |   -   |
Supported targets: 1
Supported toolchains: 4

その後書き込みたいtargetとtoolchainを設定する。

$ cd /path/to/F446_test
$ mbed target NUCLEO_F446RE
$ mbed toolchain GCC_ARM

main.cppを作成してコンパイルする。

/*main.cpp*/
#include "mbed.h"

Serial pc(USBTX, USBRX);
int i =0;
int main(){
  
  while(1){
    pc.printf("i=%d\n\r", i);
    i++;
    wait(1);
  }
}

$ mbed compile

その後書き込む。

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0a2b Intel Corp. 
Bus 001 Device 003: ID 5986:054c Acer, Inc 
Bus 001 Device 008: ID 0411:0110 BUFFALO INC. (formerly MelCo., Inc.) 
Bus 001 Device 006: ID 0483:374b STMicroelectronics ST-LINK/V2.1
Bus 001 Device 002: ID 056e:0107 Elecom Co., Ltd 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ df
ファイルシス   1K-ブロック     使用   使用可 使用% マウント位置
dev                4026244        0  4026244    0% /dev
run                4034656     1372  4033284    1% /run
/dev/sda3        116064204 71743696 44320508   62% /
tmpfs              4034656    36180  3998476    1% /dev/shm
tmpfs              4034656        0  4034656    0% /sys/fs/cgroup
tmpfs              4034656        4  4034652    1% /tmp
/dev/sda1           523248    65376   457872   13% /boot
tmpfs               806928       40   806888    1% /run/user/1000
/dev/sdc1          3979456   914368  3065088   23% /run/media/name/5480-6D35
/dev/sdb               540        8      532    2% /run/media/name/NODE_F446RE
$ cp BUILD/NUCLEO_F446RE/GCC_ARM/F446_test.bin /run/media/name/NODE_F446RE/

デバッグ方法

再度コンパイルし、かきこむ

$ mbed compile --profile debug
$ cp BUILD/NUCLEO_F446RE/GCC_ARM-DEBUG/F446_test.bin /run/media/name/NODE_F446RE/

gdb-serverをたてる

$ sudo pyocd-gdbserver 

$ arm-none-eabi-gdb BUILD/NUCLEO_F446RE/GCC_ARM-DEBUG/F446_test.elf 
GNU gdb (GDB) 8.2.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "--host=x86_64-pc-linux-gnu --target=arm-none-eabi".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from BUILD/NUCLEO_F446RE/GCC_ARM-DEBUG/F446_test.elf...done.
(gdb) target remote :3333
Remote debugging using :3333
warning: while parsing target memory map (at line 3): Required element <memory> is missing
hal_sleep () at ./mbed-os/targets/TARGET_STM/sleep.c:142
142     core_util_critical_section_exit();
(gdb) load
Loading section .text, size 0x13988 lma 0x8000000
Loading section .ARM.exidx, size 0x8 lma 0x8013988
Loading section .data, size 0xb78 lma 0x8013990
Start address 0x80074d0, load size 83208
Transfer rate: 8 KB/sec, 1891 bytes/write.
(gdb) p i
$1 = 327
(gdb)