picocom ..

比較間單直接，也是 opensource 的。

• picocom

ubuntu 18.04 的版本是 v2.2，官網最後一個版本是 3.3 了 (2019).

但是很奇怪，一直都沒有 timetag 功能。

Opensource 果然，就有人幫忙...

• picocom with timetag

但是版本只有到 1.7

build 的方法很簡單，就 clone下來 make 就可以...

./picocom --help
picocom v1.7+
Usage is: picocom [options] <tty device>
Options are:
  --<baud> <baudrate>
  --<f>low s (=soft) | h (=hard) | n (=none)
  --<p>arity o (=odd) | e (=even) | n (=none)
  --<d>atabits 5 | 6 | 7 | 8
  --<e>scape <char>
  --<noi>nit
  --no<r>eset
  --no<l>ock
  --<s>end-cmd <command>
  --recei<v>e-cmd <command>
  --<t>imestamp
  --<h>elp
<?> indicates the equivalent short option.
Short options are prefixed by "-" instead of by "--".

所以加上 timetag 的 option 是 -t

./picocom -t -b 115200 /dev/ttyUSB0 
picocom v1.7+

port is        : /dev/ttyUSB0
flowcontrol    : none
baudrate is    : 115200
parity is      : none
databits are   : 8
escape is      : C-a
noinit is      : no
noreset is     : no
nolock is      : no
send_cmd is    : ascii_xfr -s -v -l10
receive_cmd is : rz -vv

Terminal ready


0:00.002 Welcome to Ambarella
0:00.006 Ambarella login: 
0:09.447 [    0.000000] Booting Linux on physical CPU 0x0
0:09.451 [    0.000000] Linux version 4.14.181 (webb-li@rdsuper) (gcc version 8.2.1 20180802 (Linaro GCC 8.2-2018.08~dev)) #1 SMP PREEMPT Fri May 7 14:27:31 CST 2021
0:09.464 [    0.000000] Boot CPU: AArch64 Processor [410fd034]
0:09.469 [    0.000000] Machine model: Ambarella CV25 Hazelnut Board
0:09.474 [    0.000000] Reserved memory: created CMA memory pool at 0x000000000cc00000, size 48 MiB
0:09.482 [    0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
0:09.490 [    0.000000] Reserved memory: created CMA memory pool at 0x0000000010000000, size 508 MiB
0:09.498 [    0.000000] OF: reserved mem: initialized node iav@0x10000000, compatible id shared-dma-pool
0:09.507 [    0.000000] Reserved memory: created CMA memory pool at 0x0000000030000000, size 252 MiB
0:09.515 [    0.000000] OF: reserved mem: initialized node cavalry@0x30000000, compatible id shared-dma-pool
0:09.524 [    0.000000] On node 0 totalpages: 261632
0:09.528 [    0.000000]   DMA zone: 4088 pages used for memmap
0:09.532 [    0.000000]   DMA zone: 0 pages reserved
0:09.536 [    0.000000]   DMA zone: 261632 pages, LIFO batch:31
0:09.541 [    0.000000] percpu: Embedded 19 pages/cpu s38552 r8192 d31080 u77824
0:09.547 [    0.000000] pcpu-alloc: s38552 r8192 d31080 u77824 alloc=19*4096
0:09.553 [    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 
0:09.558 [    0.000000] Detected VIPT I-cache on CPU0
0:09.562 [    0.000000] CPU features: enabling workaround for ARM erratum 845719
0:09.568 [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 257544
0:09.575 [    0.000000] Kernel command line: console=ttyS0 noinitrd root=/dev/mmcblk0p8 rw rootfstype=ext4 init=/linuxrc rootwait loglevel=8
0:09.587 [    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
0:09.593 [    0.000000] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
0:09.600 [    0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
0:09.607 [    0.000000] Memory: 192952K/1046528K available (5118K kernel code, 488K rwdata, 1452K rodata, 320K init, 227K bss, 26184K reserved, 827392K cma-reserved)
..

---

退出key 是 C-a, C-x，如果要改...
--- 例如 picocom 作為 pi 的 console，進入 pi 後，開啟 pi 上面的 picocom，這時候，用 C-a, C-x 就會退出整個 pi...
可以用 option -e

picocom -e b 

這樣，退出就變成..C-b, C-x