From 0e8a56be3a1360439005bb9c3e4e8d201a9fc236 Mon Sep 17 00:00:00 2001
From: mcuw <112967559+mcuw@users.noreply.github.com>
Date: Mon, 1 Jun 2026 13:39:01 +0200
Subject: [PATCH] Add Support for GUITION C4880P443C-I-W-Y

---
 README.md               |  1 +
 extra_configs/extra.ini |  5 ++++-
 platformio.ini          | 13 ++++++++++++-
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 93130af..f2a0a28 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,7 @@ You can use these links to buy a developer board. If you want to support this pr
 - ESP32 P4 with dual-core processor up to 400 MHz
   - [10.1" ESP32-P4 LCD Display Development Board](https://s.click.aliexpress.com/e/_c2vAKbXD)* with 1280x800 Capacitive Touch Screen, Wi-Fi 6, battery and speaker
   - [JC-ESP32P4-M3-DEV](https://s.click.aliexpress.com/e/_c39YU9i9)* GUITION ESP32-P4 with ESP32-C6 Mini, Wi-Fi 6, Ethernet, TF card slot, Speaker header, Li-Ion Battery connector, microphone
+  - [C4880P443C-I-W-Y](https://s.click.aliexpress.com/e/_c4TfKXmd)* GUITION ESP32-P4 with ESP32-C6, 4.3 inch 480 * 800 IPS capacitive touch, 2MP camera module, Wi-Fi 6, Ethernet, TF card slot, Speaker header, Li-Ion Battery connector, BT 5
 
 ## Protoyping
 
diff --git a/extra_configs/extra.ini b/extra_configs/extra.ini
index 6590362..8e9dec6 100644
--- a/extra_configs/extra.ini
+++ b/extra_configs/extra.ini
@@ -6,8 +6,11 @@
 ; optional flags only needed for base esp32 boards
 ; specific boards or boards under the /boards directory are already configured with psram support
 build_flags_psram =
-  -DBOARD_HAS_PSRAM=1
+  -D BOARD_HAS_PSRAM=1
   -mfix-esp32-psram-cache-issue ; https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/external-ram.html#esp32-rev-v1
+build_flags_native_usb =
+  -D ARDUINO_USB_MODE=1
+  -D ARDUINO_USB_CDC_ON_BOOT=1
 
 ; platform = https://github.com/pioarduino/platform-espressif32/releases/download/stable/platform-espressif32.zip
 ; or use platformio, versions: https://github.com/platformio/platform-espressif32/releases
diff --git a/platformio.ini b/platformio.ini
index e6dd37c..00bb15e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -278,7 +278,7 @@ board = esp32-p4-evboard
 board_build.partitions = partitions/partitions_16mb_ota_phy.csv
 upload_speed = 1500000
 
-; ESP32-P4 JC-ESP32P4-M3-DEV
+; ESP32-P4 M3 (GUITION JC-ESP32P4-M3-DEV)
 ; board: https://github.com/pioarduino/platform-espressif32/blob/main/boards/esp32-p4.json
 [env:esp32_p4_m3_dev]
 extends = esp32p4
@@ -286,3 +286,14 @@ board = esp32-p4
 board_build.partitions = partitions/partitions_16mb_ota_phy.csv
 board_build.variant = ${PIOENV}
 board_build.variants_dir = variants
+
+; ESP32-P4 M3 with native USB serial port (GUITION C4880P443C-I-W-Y)
+; board: https://github.com/pioarduino/platform-espressif32/blob/main/boards/esp32-p4.json
+[env:esp32_p4_m3_dev_native_usb]
+extends = env:esp32_p4_m3_dev
+; TODO: check if the same board config can be used for both M3
+board_build.variant = esp32_p4_m3_dev
+board_build.variants_dir = variants
+build_flags =
+    ${env:esp32_p4_m3_dev.build_flags}
+    ${extra.build_flags_native_usb}