Before You Begin
Install Required Tools & Dependencies
- sudo apt-get install cvs libstdc++5 ia32-libs libglib2.0-dev
Download eCos then Setup
- wget --passive-ftp ftp://ecos.sourceware.org/pub/ecos/ecos-install.tcl
- sh ecos-install.tcl
- choose a faster distribution site, like "[16] ftp://ftp.u-aizu.ac.jp/pub/gnu/cygnus/ecos", which may locate in Japan
- choose a location to store the downloads, take default /home/<username>/ecos as example in this article
- select "[1] arm-eabi", which is said in my course assignment instruction; however, I found we don't need this if we have arm-none-eabi (which we've installed already)
- cd /home/<username>/ecos
- cvs -z3 -d :pserver:anoncvs@ecos.sourceware.org:/cvs/ecos co -P ecos
- in file "ecosenv.sh", modify "ECOS_REPOSITORY=/home/<username>/ecos/ecos-3.0/packages ; export ECOS_REPOSITORY" to "ECOS_REPOSITORY=/home/<username>/ecos/ecos/packages ; export ECOS_REPOSITORY"
- . ecosenv.sh
- this exports the system PATHs for ecos tools
Create HelloWorld Project
- cd <somewhere you like to place you project>
- mkdir ecos_project && cd ecos_project
- ecosconfig new stm32f4discovery
- configtool
- change "eCos HAL->Cortex-M Architecture->Cortex-M3/-M4 STM32 Variant->STMicoelectronics STM32F4-Discovery board HAL->Startup Type" to ROM instead of JTAG
- this starts an GUI interface, open the "ecos.ecc" file which locates in the folder "stm32f4discovery" just created
- press "Build" -> "Generate Build Tree"
- create an hello.c file, like:
#include <stdio.h>
int main(){
printf("hello ecos!\r\n");
}
- arm-none-eabi-gcc -o Hello.elf hello.c -Lecos_install/lib -I ecos_install/include -mcpu=cortex-m4 -mthumb -g -O2 -ffunction-sections -fdata-sections -Ttarget.ld -nostdlib
- arm-none-eabi-objcopy -O binary -R .sram Hello.elf Hello.bin
- finally, you got Hello.bin here, and burn it into stm32 by following the instruction in last article using QSTLink2
