[chbot] Cruising aliexpress again!!

[Robin Gilks]

>
> ..... everything seems to be good with gcc and
> newlib. Its quick, supported, free, it works!!
>
> No hardware yet to test my sample code or compare it to the same source
> compiled for atmega328p (Arduino nano clone hardware) but the fact that it
> compiles is good enough for now :)
>

Comparing AVR to STM32 certainly highlights the efficiency of thumb mode
so that code size is very similar - data size is way bigger on arm due to
everything being 32 bit I suppose!!

$ arm-none-eabi-size -A images/fred.elf
images/fred.elf  :
section             size        addr
.text              18400           0
.data                404   536870912
.bss                 468   536871316
.debug_info        33913           0
.debug_abbrev       9214           0
.debug_loc          5191           0
.debug_aranges      1608           0
.debug_ranges       1144           0
.debug_macro       32052           0
.debug_line        22497           0
.debug_str        101482           0
.comment              88           0
.ARM.attributes       49           0
.debug_frame        3460           0
Total             229970


$ avr-size -A images/fred1.elf
images/fred1.elf  :
section            size      addr
.data               136   8388864
.text             18052         0
.bss                260   8389000
.comment             17         0
.debug_aranges     1488         0
.debug_info       45909         0
.debug_abbrev     12436         0
.debug_line       10315         0
.debug_frame       5580         0
.debug_str         5622         0
.debug_loc        40642         0
.debug_ranges      1640         0
Total            142097



-- 
Robin Gilks