Bring the Elecrow's GT911 out of reset through the V3.0's PCA9557 (0.2.95, firmware 0.2.81)

A unit's touch never answered: "touchscreen is marked FAILED: Calibration error" at setup, the GT911 still in reset behind the PCA9557 (I2C 0x18) of the V3.0 board. The board file declares the expander as ESPHome's pca9554 (the same register map) and hands the GT911 driver its reset (IO0) and interrupt (IO1) pins on it, so the driver runs Elecrow's own sequence: reset low with the interrupt line low, reset high, 56 ms, address 0x5D. A V2.0 without the expander boots its GT911 by the pull-up as before. The bus is scanned at boot for the log.
2026-09-21 12:54:18 -07:00
parent a3ef7f09a1
commit da28d19961
7 changed files with 50 additions and 27 deletions
@@ -14,7 +14,7 @@
 # fonts/materialdesignicons-webfont.ttf (Apache 2.0, github.com/Templarian/MaterialDesign-Webfont).
 ############################################################
 substitutions:
-  SCREEN_FIRMWARE_VERSION: "0.2.80"
+  SCREEN_FIRMWARE_VERSION: "0.2.81"
  DASHBOARD_INBOX_INTERNAL: "false"
  CALIBRATION_ON_BOOT: "false"                     # a bench build: start on the touch test page
  ROOM_NAME: ""                                    # top left until ESP Screens sends the screen name