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pigweed / pigweed / experimental / 70a1399f716feb461ed9e4eeb91af72119b2fb43
commit70a1399f716feb461ed9e4eeb91af72119b2fb43[log] [tgz]
authorChris Mumford <cmumford@google.com>Wed Oct 12 16:20:15 2022 +0000
committerCQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Oct 12 16:20:15 2022 +0000
treef1b5841f0b7e8923b546ce82eeb1657e244078e5
parent5a2321615c51db99db91c9b45c701928ccd43400 [diff]
pw_display: Add InitFramebuffer() function.

As not all displays are the same size so move the job of initializing the
framebuffer to pw_display. In this change pw_display::UpdatePixelDouble()
remains, but is unused. It is the responsibility of the display to do
pixel doubling if necessary. pw_display_stm32f429i_disc1_stm32cube_ili9341
has support for pixel doubling (with an #ifdef change), but no other
displays currently support it.

Change-Id: I265ac0bd751faa1120fd6e43d0fd51c0a8553259
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/113270
Reviewed-by: Anthony DiGirolamo <tonymd@google.com>
Commit-Queue: Chris Mumford <cmumford@google.com>
17 files changed
tree: f1b5841f0b7e8923b546ce82eeb1657e244078e5
  1. applications/
  2. build_overrides/
  3. infra/
  4. pw_board_led/
  5. pw_board_led_arduino/
  6. pw_board_led_host/
  7. pw_board_led_pico/
  8. pw_board_led_stm32cube/
  9. pw_board_led_stm32f429i_disc1/
  10. pw_digital_io_pico/
  11. pw_digital_io_stm32cube/
  12. pw_display_driver/
  13. pw_display_driver_ili9341/
  14. pw_graphics/
  15. pw_spi_pico/
  16. pw_spi_stm32f429i_disc1_stm32cube/
  17. pw_spin_delay/
  18. pw_spin_delay_arduino/
  19. pw_spin_delay_host/
  20. pw_spin_delay_pico/
  21. pw_spin_delay_stm32cube/
  22. pw_spin_delay_stm32f429i_disc1/
  23. targets/
  24. third_party/
  25. tools/
  26. .clang-format ⇨ third_party/pigweed/.clang-format
  27. activate.sh ⇨ bootstrap.sh
  28. .gitattributes
  29. .gitignore
  30. .gitmodules
  31. .gn
  32. activate.bat
  33. banner.txt
  34. bootstrap.bat
  35. bootstrap.sh
  36. BUILD.gn
  37. BUILDCONFIG.gn
  38. env_setup.json
  39. navbar.md
  40. OWNERS
  41. PW_PLUGINS
  42. README.md
README.md

Pigweed Experimental

This repository contains experimental pigweed modules.

Repository setup

Clone this repo with --recursive to get all required submodules.

git clone --recursive https://pigweed.googlesource.com/pigweed/experimental

This will pull the Pigweed source repository into third_party/pigweed. If you already cloned but forgot to --recursive run git submodule update --init to pull all submodules.

pw_graphics

The //pw_graphics folder contains some libraries for drawing to an RGB565 framebuffer and displaying it on various platforms.

The demo applications that make use of these libraries are:

Build instructions

First time setup:

git clone --recursive https://pigweed.googlesource.com/pigweed/experimental
cd experimental
. ./bootstrap.sh
pw package install imgui
pw package install glfw
pw package install stm32cube_f4
pw package install pico_sdk

STM32F429-DISC1

Compile:

gn gen out --export-compile-commands --args="
  dir_pw_third_party_stm32cube_f4=\"$PW_PROJECT_ROOT/environment/packages/stm32cube_f4\"
"
ninja -C out

Flash:

openocd -f third_party/pigweed/targets/stm32f429i_disc1/py/stm32f429i_disc1_utils/openocd_stm32f4xx.cfg -c "program out/stm32f429i_disc1_stm32cube_debug/obj/applications/terminal_display/bin/terminal_demo.elf verify reset exit"

Linux, Windows or Mac

Compile:

gn gen out --export-compile-commands --args="
  dir_pw_third_party_imgui=\"$PW_PROJECT_ROOT/environment/packages/imgui\"
  dir_pw_third_party_glfw=\"$PW_PROJECT_ROOT/environment/packages/glfw\"
"
ninja -C out

Run:

out/host_debug/obj/applications/terminal_display/bin/terminal_demo

Raspberry Pi Pico Connected to an external SPI display

Working displays:

Compile:

gn gen out --export-compile-commands --args="
  PICO_SRC_DIR=\"$PW_PROJECT_ROOT/environment/packages/pico_sdk\"
"
ninja -C out

Flash:

  • Using a uf2 file:

    ./out/host_debug/obj/targets/rp2040/bin/elf2uf2 ./out/rp2040/obj/applications/terminal_display/bin/terminal_demo.elf ./out/rp2040/obj/applications/terminal_display/bin/terminal_demo.uf2

    Copy ./out/rp2040/obj/applications/terminal_display/bin/terminal_demo.uf2 to your Pi Pico.

  • Using a Pico Probe and openocd:

    This requires installing the Raspberry Pi foundation's OpenOCD fork for the Pico probe. More details including how to connect the two Pico boards is available at Raspberry Pi Pico and RP2040 - C/C++ Part 2: Debugging with VS Code

    Install RaspberryPi's OpenOCD Fork:

    git clone https://github.com/raspberrypi/openocd.git \
  --branch picoprobe \
  --depth=1 \
  --no-single-branch \
  openocd-picoprobe

cd openocd-picoprobe

./bootstrap
./configure --enable-picoprobe --prefix=$HOME/apps/openocd --disable-werror
make -j2
make install

    Setup udev rules (Linux only):

    cat <<EOF > 49-picoprobe.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2e8a", ATTRS{idProduct}=="0004", MODE:="0666"
KERNEL=="ttyACM*", ATTRS{idVendor}=="2e8a", ATTRS{idProduct}=="0004", MODE:="0666"
EOF
sudo cp 49-picoprobe.rules /usr/lib/udev/rules.d/49-picoprobe.rules
sudo udevadm control --reload-rules

    Flash the Pico:

    ~/apps/openocd/bin/openocd -f ~/apps/openocd/share/openocd/scripts/interface/picoprobe.cfg -f ~/apps/openocd/share/openocd/scripts/target/rp2040.cfg -c 'program out/rp2040/obj/applications/terminal_display/bin/terminal_demo.elf verify reset exit'