Difference between revisions of "Xtensa"

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{{Warning | The ESP32 support is highly experimental and prone to be broken. This description is work in progress.}}
 
{{Warning | The ESP32 support is highly experimental and prone to be broken. This description is work in progress.}}
  
= Building FPC =
 
 
== Preparations ==
 
 
----
 
----
 
So far Linux and Mac hosts only
 
So far Linux and Mac hosts only
 
----
 
----
  
=== Xtensa-FreeRTOS ===
+
== Xtensa-FreeRTOS ==
 +
 
 +
=== Preparations ===
  
 
Native stable FPC must be installed and working on the system.
 
Native stable FPC must be installed and working on the system.
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to get the path and environment set (namely tools path and  $IDF_PATH are needed)
 
to get the path and environment set (namely tools path and  $IDF_PATH are needed)
 +
 +
=== Build FPC ===
  
 
Change into the fpc directory and run
 
Change into the fpc directory and run
  
 
   make FPC=fpc CPU_TARGET=xtensa OS_TARGET=freertos "CROSSOPT=-Cplx6 -XPxtensa-esp32-elf- -Cfhard" all -j
 
   make FPC=fpc CPU_TARGET=xtensa OS_TARGET=freertos "CROSSOPT=-Cplx6 -XPxtensa-esp32-elf- -Cfhard" all -j
 +
 +
=== Compile and run test program ===
  
 
Create a hello world program in the fpc dir and compile it with
 
Create a hello world program in the fpc dir and compile it with

Revision as of 10:50, 19 April 2020

Warning-icon.png

Warning: The ESP32 support is highly experimental and prone to be broken. This description is work in progress.


So far Linux and Mac hosts only


Xtensa-FreeRTOS

Preparations

Native stable FPC must be installed and working on the system.

Install esp-idf based on the instructions given here:

Get Started (for Stable Release)

Follow the instructions to a least step 8 where you build the hello_word demo project.

copy all the freshly compiled .a files from the current project directory to a directory of your choice:

 mkdir ~/esp/xtensa-esp32-elf-libs
 find ~/esp/ -name "*.a" -exec cp {} ~/esp/xtensa-esp32-elf-libs \; 

Notes:

  • One should not copy libraries from the project/build/bootloader directory, since these libraries do not contain full functionality.
  • Some of the required libraries are located in the esp-idf/components folder. Important to also copy the libraries in the ~/esp/esp-idf/component directory if the demo project was copied to outside the esp-idf directory.

Now you are ready to compile fpc and rtl.

execute

export IDF_PATH=~/esp/esp-idf
source ~/esp/esp-idf/export.sh

to get the path and environment set (namely tools path and $IDF_PATH are needed)

Build FPC

Change into the fpc directory and run

 make FPC=fpc CPU_TARGET=xtensa OS_TARGET=freertos "CROSSOPT=-Cplx6 -XPxtensa-esp32-elf- -Cfhard" all -j

Compile and run test program

Create a hello world program in the fpc dir and compile it with

 compiler/ppcrossxtensa -Furtl/units/xtensa-freertos/ -Tfreertos -XPxtensa-esp32-elf- -O3 -Wpesp32 -Fl~/esp/xtensa-esp32-elf-libs  -Fl~/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/xtensa-esp32-elf/lib/ hello

Get partition-table.bin and bootloader.bin from the hello_world example compiled above and copy them into the same dir as the compiled hello.bin

Flash with

 esptool.py -p /dev/ttyUSB0 -b 460800 --before default_reset --after hard_reset --chip esp32  write_flash --flash_mode dio --flash_size detect --flash_freq 40m 0x1000 bootloader.bin 0x8000 partition-table.bin 0x10000 hello.bin

Monitor the output with:

 idf_monitor.py  --port /dev/ttyUSB0 hello.elf

Note:

  • Once the bootloader and partition table has been flashed once one could also just flash the application only:
 esptool.py -p /dev/ttyUSB0 -b 460800 --before default_reset --after hard_reset --chip esp32  write_flash --flash_mode dio --flash_size detect --flash_freq 40m 0x10000 hello.bin

Xtensa-Linux

Xtensa-Embedded