Fix 3.5 CYD: backlight GPIO27, LCD SCL 21 via Wire1, GT911 INT as input.
Align cyd_35r with CYD_PROJECT_GUIDE so ST7796 is not black-screened, LCD does not steal GT911 Wire, and firmware/docs match 22+21 wiring. Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
42
README.md
42
README.md
@@ -1,27 +1,29 @@
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# LCD1602A 液晶（CYD）
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触控 + LVGL 参考 `tftest` / `hw269test` / `hw069digitdisplaytest`。
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触控 + LVGL 参考 `tftest` / `hw269test` / `CYD_PROJECT_GUIDE.md`。
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LCD1602A（HD44780）经 **PCF8574 I2C 转接板** 驱动：改两行文字、背光、脚位映射。
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用途：16×2 **字符提示屏**（状态、读数、短菜单）。驱动简单、资料多；不是彩屏替代品。本工程用于在 CYD 上验证接线与显示是否正常。
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## 硬件
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| 项目 | 说明 |
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|------|------|
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| 板子 | CYD ESP32-2432S028R |
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| 模块 | LCD1602A + I2C 背包（PCF8574，实测地址常为 **0x27**，亦见 **0x3F**） |
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| SDA | **GPIO22** |
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| SCL | **GPIO27** |
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| 项目 | **2.8"（默认 `cyd`）** | **3.5C（`cyd_35r`）** |
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|------|------------------------|------------------------|
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| 板子 | ESP32-2432S028R | ESP32-3248S035C |
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| 屏 / 触控 | ILI9341 + XPT2046 SoftSPI | ST7796 + GT911 I2C |
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| TFT 背光 | GPIO21 | **GPIO27** |
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| LCD SDA | **GPIO22** | **GPIO22**（不变） |
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| LCD SCL | **GPIO27** | **GPIO21**（2.8 的 27 → 21） |
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| LCD 总线 | `Wire` | `Wire1`（GT911 占 `Wire` 33/32） |
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接线：
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| LCD1602A(I2C) | CYD |
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|---------------|-----|
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| VCC | **5V**（推荐；3.3V 可能对比度不稳） |
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| GND | GND |
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| SDA | GPIO22 |
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| SCL | GPIO27 |
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| LCD1602A(I2C) | 2.8" CYD | 3.5" C CYD |
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|---------------|----------|------------|
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| VCC | **5V**（推荐） | 同左 |
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| GND | GND | GND |
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| SDA | GPIO22 | GPIO22 |
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| SCL | GPIO27 | **GPIO21** |
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上电扫描 `0x27 / 0x3F / 0x26 / 0x3E / 0x20 / 0x38`。串口与 TFT 状态栏显示是否找到地址。
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@@ -41,7 +43,8 @@ LCD1602A（HD44780）经 **PCF8574 I2C 转接板** 驱动：改两行文字、
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1. 确认已调对比度 + VCC=5V
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2. TFT 点 **Map** 换 PCF8574 脚位映射，再点 **Hello**
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3. 看串口是否有 `PCF8574 found @ 0x..` / `LCD1602A OK`
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3. 看串口是否有 `PCF8574 found @ 0x..` / `LCD1602A OK`
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4. 3.5：确认 SCL 接的是 **21** 不是 27（27 是 TFT 背光）
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## 操作
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@@ -54,14 +57,23 @@ LCD1602A（HD44780）经 **PCF8574 I2C 转接板** 驱动：改两行文字、
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## 构建 / 烧录
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```powershell
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# 2.8"
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pio run -e cyd -t upload
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# 3.5C
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pio run -e cyd_35r -t upload
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```
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## 预编译固件
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```powershell
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# 2.8"
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cd firmware\cyd
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.\flash.ps1
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# 3.5"
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cd firmware\cyd_35r
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.\flash.ps1
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# 或 .\flash.ps1 -Port COMx
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```
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@@ -69,6 +81,7 @@ cd firmware\cyd
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```powershell
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.\firmware\export_from_build.ps1
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.\firmware\export_from_build.ps1 -Env cyd_35r
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```
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## 变更记录
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@@ -78,3 +91,4 @@ cd firmware\cyd
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| 2026-10-23 | 初版：I2C LCD1602A（SDA22/SCL27）+ SoftSPI 触控 + LVGL；Demo/Hello/背光 |
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| 2026-10-23 | 修空白屏：对齐 LiquidCrystal_I2C 时序；增加 Map；提示拧蓝色对比度电位器 |
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| 2026-10-23 | 文档：对比度仅硬件可调、关背光通常不可读、用途与排障说明 |
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| 2026-10-25 | 按指南修正 3.5：BL=27、外设 22+21、GT911 INT 复位后 INPUT、LCD 用 Wire1 |
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@@ -1,17 +1,20 @@
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# 预编译固件
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目录：[`cyd/`](cyd/)
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| 目录 | 板型 |
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|------|------|
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| [`cyd/`](cyd/) | **2.8"** ESP32-2432S028R（ILI9341），LCD SDA22/SCL27 |
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| [`cyd_35r/`](cyd_35r/) | **3.5C** ESP32-3248S035C（ST7796），LCD SDA22/SCL21，BL=27 |
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板子：**CYD ESP32-2432S028R**（ILI9341）
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功能：LCD1602A I2C（SDA=GPIO22，SCL=GPIO27，PCF8574）+ SoftSPI 触控 + LVGL
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说明见仓库根目录 [`README.md`](../README.md)（对比度电位器、背光、Map 脚位）。
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说明见仓库根目录 [`README.md`](../README.md)（对比度电位器、背光、Map 脚位、板型接线）。
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## 刷写
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```powershell
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cd firmware\cyd
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.\flash.ps1
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# 或 3.5:
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cd firmware\cyd_35r
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.\flash.ps1
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# 或 .\flash.ps1 -Port COM3
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```
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@@ -19,5 +22,6 @@ cd firmware\cyd
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```powershell
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.\firmware\export_from_build.ps1
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.\firmware\export_from_build.ps1 -SkipBuild
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.\firmware\export_from_build.ps1 -Env cyd_35r
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.\firmware\export_from_build.ps1 -SkipBuild -Env cyd_35r
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```
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15
firmware/cyd_35r/VERSION.txt
Normal file
15
firmware/cyd_35r/VERSION.txt
Normal file
@@ -0,0 +1,15 @@
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name: CYD lcd1602atest (cyd_35r)
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git: 57644d2
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date: 2026-10-25
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board: ESP32-3248S035 (ST7796)
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flash_size: 4MB
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offsets:
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0x1000 bootloader.bin
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0x8000 partitions.bin
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0xe000 boot_app0.bin
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0x10000 firmware.bin
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sha256:
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bootloader.bin 3D234A7471F67B013686DABD4DEE7C1FA915C9928463616A94BC9297ACF1ABF8
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boot_app0.bin F94C5D786A7A8FAB06AC5D10E33BF37711A6697636DC037559EA19CC410A17F0
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firmware.bin 9C0D00C0D8ABC9CCF55E4BB78DB51A49113B7C2095C029D15BBCBAF67EE0F05A
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partitions.bin 148B959CBFF1C38AA8E1D5C0BA9D612C54997B945E56A63F41223EEF650653A1
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BIN
firmware/cyd_35r/boot_app0.bin
Normal file
BIN
firmware/cyd_35r/boot_app0.bin
Normal file
Binary file not shown.
BIN
firmware/cyd_35r/bootloader.bin
Normal file
BIN
firmware/cyd_35r/bootloader.bin
Normal file
Binary file not shown.
BIN
firmware/cyd_35r/firmware.bin
Normal file
BIN
firmware/cyd_35r/firmware.bin
Normal file
Binary file not shown.
5
firmware/cyd_35r/flash.bat
Normal file
5
firmware/cyd_35r/flash.bat
Normal file
@@ -0,0 +1,5 @@
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@echo off
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setlocal
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cd /d "%~dp0"
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powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0flash.ps1" %*
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exit /b %ERRORLEVEL%
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98
firmware/cyd_35r/flash.ps1
Normal file
98
firmware/cyd_35r/flash.ps1
Normal file
@@ -0,0 +1,98 @@
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# Flash archived CYD LCD1602A firmware (no rebuild needed)
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# Usage:
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# .\flash.ps1
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# .\flash.ps1 -Port COM5
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# .\flash.ps1 -Port COM5 -Baud 460800
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param(
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[string]$Port = "",
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[int]$Baud = 921600
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)
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$ErrorActionPreference = "Stop"
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$here = Split-Path -Parent $MyInvocation.MyCommand.Path
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Set-Location $here
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function Find-Esptool {
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$pio = Get-Command pio -ErrorAction SilentlyContinue
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if (-not $pio) {
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$pioPath = Join-Path $env:USERPROFILE "AppData\Local\Programs\Python\Python312\Scripts\pio.exe"
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if (Test-Path $pioPath) {
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$env:Path = "$(Split-Path $pioPath);$env:Path"
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$pio = Get-Command pio -ErrorAction SilentlyContinue
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}
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}
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if ($pio) {
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$pkg = Join-Path $env:USERPROFILE ".platformio\packages\tool-esptoolpy\esptool.py"
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if (Test-Path $pkg) { return @{ Kind = "py"; Path = $pkg } }
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}
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$py = Get-Command python -ErrorAction SilentlyContinue
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if ($py) {
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try {
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& python -c "import esptool" 2>$null
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if ($LASTEXITCODE -eq 0) { return @{ Kind = "mod"; Path = "esptool" } }
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} catch {}
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}
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$esp = Get-Command esptool.py -ErrorAction SilentlyContinue
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if ($esp) { return @{ Kind = "py"; Path = $esp.Source } }
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return $null
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}
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if (-not $Port) {
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$ports = @()
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try {
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Add-Type -AssemblyName System.IO.Ports -ErrorAction SilentlyContinue | Out-Null
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$ports = [System.IO.Ports.SerialPort]::GetPortNames() | Sort-Object
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} catch {}
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if (-not $ports -or $ports.Count -eq 0) {
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$ports = Get-CimInstance Win32_SerialPort -ErrorAction SilentlyContinue |
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Select-Object -ExpandProperty DeviceID | Sort-Object
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}
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if (-not $ports -or $ports.Count -eq 0) {
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Write-Error "No serial ports found. Plug in the CYD USB cable, then retry with -Port COMx"
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}
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if ($ports.Count -eq 1) {
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$Port = $ports[0]
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} else {
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Write-Host "Available ports: $($ports -join ', ')"
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$Port = $ports[-1]
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Write-Host "Using last port: $Port (override with -Port)"
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}
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}
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$tool = Find-Esptool
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if (-not $tool) {
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Write-Error "esptool not found. Install PlatformIO (`pio`) or: pip install esptool"
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}
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$needed = @("bootloader.bin", "partitions.bin", "boot_app0.bin", "firmware.bin")
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foreach ($f in $needed) {
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if (-not (Test-Path (Join-Path $here $f))) {
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Write-Error "Missing $f — run ..\export_from_build.ps1 from repo root first"
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}
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}
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$argsCommon = @(
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"--chip", "esp32",
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"--port", $Port,
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"--baud", "$Baud",
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"--before", "default_reset",
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"--after", "hard_reset",
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"write_flash", "-z",
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"--flash_mode", "dio",
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"--flash_freq", "40m",
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"--flash_size", "4MB",
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"0x1000", "bootloader.bin",
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"0x8000", "partitions.bin",
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"0xe000", "boot_app0.bin",
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"0x10000", "firmware.bin"
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)
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Write-Host "Flashing $here -> $Port @ $Baud"
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if ($tool.Kind -eq "mod") {
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& python -m esptool @argsCommon
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} else {
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& python $tool.Path @argsCommon
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}
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if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
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Write-Host "Done. Open serial monitor at 115200 if needed."
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55
firmware/cyd_35r/media/preview.html
Normal file
55
firmware/cyd_35r/media/preview.html
Normal file
@@ -0,0 +1,55 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<title>LCD1602A</title>
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<style>
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*{box-sizing:border-box;margin:0;padding:0}
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html,body{width:320px;height:240px;overflow:hidden;background:#000;margin:0}
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.bezel{width:320px;height:240px;background:#1a1408}
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.screen{width:320px;height:240px;background:#0A1016;color:#EAF0F6;font:12px/1.2 system-ui,sans-serif;position:relative;overflow:hidden}
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.muted{color:#7A8B9C}.ok{color:#3DDC97}.bad{color:#E85D4C}.acc{color:#4FC3F7}.amber{color:#FFB74D}
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.btn{border:0;border-radius:8px;background:#243140;color:#EAF0F6;font-weight:600}
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.btn.acc{background:#1A4A6E}.btn.on{background:#1B5E4A}.btn.warn{background:#6B3A1E}
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.t{position:absolute;left:0;right:0;top:2px;text-align:center;font-size:24px;font-weight:700}
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.pin{position:absolute;left:0;right:0;top:34px;text-align:center;font-size:11px}
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.st{position:absolute;left:0;right:0;top:52px;text-align:center;font-weight:700}
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.warn{position:absolute;left:8px;right:8px;top:72px;text-align:center;font-size:11px;color:#FFB74D}
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.line{position:absolute;left:24px;right:24px;height:22px;background:#0d1820;border:1px solid #1E2C40;border-radius:4px;
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color:#7CDBFF;font-family:ui-monospace,monospace;padding:2px 8px;display:flex;align-items:center}
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.l1{top:96px}.l2{top:122px}
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.grid{position:absolute;left:12px;right:12px;bottom:10px;display:grid;grid-template-columns:1fr 1fr;gap:8px}
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.grid .btn{height:36px}
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/* CYD 3.5" full-bleed: non-uniform scale matches firmware UX()/UY(). */
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html,body{width:480px!important;height:320px!important;overflow:hidden!important;background:#000!important;margin:0!important;padding:0!important}
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.cyd35-scale{width:320px;height:240px;transform:scale(1.5,1.3333333333);transform-origin:0 0;overflow:hidden}
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</style>
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</head>
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<body>
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<div class="cyd35-scale">
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<div class="bezel"><div class="screen" id="s">
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<div class="t">LCD1602A</div>
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<div class="pin muted">I2C SDA22 SCL27 PCF8574</div>
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<div class="st ok">OK 0x27 map0</div>
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<div class="warn">Blank? turn BLUE pot on backpack</div>
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<div class="line l1">[Hello World!]</div>
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<div class="line l2">[LCD1602A]</div>
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<div class="grid">
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<button class="btn" type="button">Demo 1/4</button>
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<button class="btn" type="button">Hello</button>
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<button class="btn" type="button">Map 0</button>
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<button class="btn on" type="button">BL ON</button>
|
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</div>
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|
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</div></div>
|
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|
||||
</div>
|
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</body>
|
||||
</html>
|
||||
19
firmware/cyd_35r/meta.json
Normal file
19
firmware/cyd_35r/meta.json
Normal file
@@ -0,0 +1,19 @@
|
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{
|
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"boardId": "esp32-3248s035",
|
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"name": "CYD LCD1602A (3.5\")",
|
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"summary": "LCD1602A HD44780 via PCF8574 I2C: SDA GPIO22, SCL GPIO21 — demo / hello / map / backlight; contrast = blue pot only",
|
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"description": "GT911 capacitive touch + LVGL on ESP32-3248S035C (ST7796, BL=GPIO27). LCD1602A on I2C backpack Wire1 SDA22/SCL21 (scan 0x27/0x3F). Contrast is hardware pot (Vo), not software. Backlight off usually unreadable on blue/white modules.",
|
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"tags": [
|
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"lcd1602a",
|
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"hd44780",
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"pcf8574",
|
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"i2c",
|
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"display",
|
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"touch",
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"lvgl",
|
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"cyd35"
|
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],
|
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"media": {
|
||||
"preview": "media/preview.html"
|
||||
}
|
||||
}
|
||||
BIN
firmware/cyd_35r/partitions.bin
Normal file
BIN
firmware/cyd_35r/partitions.bin
Normal file
Binary file not shown.
@@ -8,19 +8,25 @@
|
||||
#define SCREEN_HEIGHT 480
|
||||
#define UI_HOR_RES 480
|
||||
#define UI_VER_RES 320
|
||||
/* 3.5C capacitive GT911 (ESP32-3248S035C). GPIO33 is I2C SDA, not TOUCH_CS.
|
||||
* Backlight is GPIO27; INT is GPIO21 — they are NOT the same pin. */
|
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#define CYD_GT911_SDA 33
|
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#define CYD_GT911_SCL 32
|
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#define CYD_GT911_INT 21
|
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#define CYD_GT911_RST 25
|
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#else
|
||||
#define TFT_BL_PIN 21
|
||||
#define SCREEN_WIDTH 240
|
||||
#define SCREEN_HEIGHT 320
|
||||
#define UI_HOR_RES 320
|
||||
#define UI_VER_RES 240
|
||||
#endif
|
||||
|
||||
/* 2.8" CYD: dedicated SoftSPI touch bus. */
|
||||
#define CYD_TOUCH_IRQ 36
|
||||
#define CYD_TOUCH_MOSI 32
|
||||
#define CYD_TOUCH_MISO 39
|
||||
#define CYD_TOUCH_CLK 25
|
||||
#define CYD_TOUCH_CS 33
|
||||
#endif
|
||||
|
||||
/* Map 320x240 design coordinates onto the active UI resolution (identity on 2.8"). */
|
||||
#define UX(x) ((int)(((long)(x) * (UI_HOR_RES)) / 320))
|
||||
@@ -28,9 +34,20 @@
|
||||
#define UW(w) UX(w)
|
||||
#define UH(h) UY(h)
|
||||
|
||||
/* Partial frame buffer: 3.5 needs smaller ratio to fit DRAM. */
|
||||
#if defined(CYD_BOARD_3248S035)
|
||||
#define DRAW_BUF_DIV 20
|
||||
#else
|
||||
#define DRAW_BUF_DIV 10
|
||||
#endif
|
||||
|
||||
/* LCD1602A I2C backpack: 2.8 forever 22+27; 3.5 forever 22+21 (27 is BL). */
|
||||
#define LCD_I2C_SDA_PIN 22
|
||||
#if defined(CYD_BOARD_3248S035)
|
||||
#define LCD_I2C_SCL_PIN 21
|
||||
#else
|
||||
#define LCD_I2C_SCL_PIN 27
|
||||
#endif
|
||||
#define LCD_I2C_FREQ_HZ 100000
|
||||
#define LCD_COLS 16
|
||||
#define LCD_ROWS 2
|
||||
|
||||
@@ -1,5 +1,6 @@
|
||||
; CYD ESP32-2432S028 — LCD1602A I2C(SDA22/SCL27) + SoftSPI 触控 + LVGL
|
||||
; 触控/屏配置参考 tftest / hw269test / hw069digitdisplaytest
|
||||
; CYD — LCD1602A I2C + 触控 + LVGL
|
||||
; 2.8 (cyd): SDA22/SCL27 SoftSPI; 3.5 (cyd_35r): SDA22/SCL21 GT911, BL=27
|
||||
; 参考 tftest / temperature / CYD_PROJECT_GUIDE.md
|
||||
[env:cyd]
|
||||
platform = espressif32
|
||||
board = esp32dev
|
||||
@@ -55,19 +56,26 @@ build_flags =
|
||||
|
||||
extra_scripts = pre:copy_lv_conf.py
|
||||
|
||||
; Optional 3.5" CYD ESP32-3248S035 (ST7796 resistive). Default remains [env:cyd].
|
||||
; Optional 3.5" CYD ESP32-3248S035C (ST7796 + GT911 capacitive). Default [env:cyd].
|
||||
; Build: pio run -e cyd_35r
|
||||
; Keep TOUCH_CS=-1 — GPIO33 is GT911 SDA, not resistive touch CS.
|
||||
; TFT_BL=GPIO27 (not 21 — 21 is GT911 INT / LCD SCL). See ../CYD_PROJECT_GUIDE.md
|
||||
[env:cyd_35r]
|
||||
extends = env:cyd
|
||||
build_unflags =
|
||||
-DILI9341_2_DRIVER=1
|
||||
-DTFT_WIDTH=240
|
||||
-DTFT_HEIGHT=320
|
||||
-DTFT_BL=21
|
||||
-DLV_MEM_SIZE=49152
|
||||
build_flags =
|
||||
${env:cyd.build_flags}
|
||||
-UILI9341_2_DRIVER
|
||||
-DST7796_DRIVER=1
|
||||
-UTFT_WIDTH
|
||||
-UTFT_HEIGHT
|
||||
-DTFT_WIDTH=320
|
||||
-DTFT_HEIGHT=480
|
||||
-UTFT_BL
|
||||
-DTFT_BL=27
|
||||
-DCYD_BOARD_3248S035=1
|
||||
|
||||
-DUSE_HSPI_PORT
|
||||
-DSUPPORT_TRANSACTIONS
|
||||
-DTFT_RGB_ORDER=TFT_BGR
|
||||
-DLV_MEM_SIZE=32768
|
||||
|
||||
32
src/lcd.cpp
32
src/lcd.cpp
@@ -5,6 +5,14 @@
|
||||
#include <Wire.h>
|
||||
#include <string.h>
|
||||
|
||||
/* 3.5: GT911 owns Wire (SDA33/SCL32); LCD uses Wire1 (SDA22/SCL21).
|
||||
* 2.8: touch is SoftSPI — LCD alone on Wire (SDA22/SCL27). */
|
||||
#if defined(CYD_BOARD_3248S035)
|
||||
#define LCD_WIRE Wire1
|
||||
#else
|
||||
#define LCD_WIRE Wire
|
||||
#endif
|
||||
|
||||
// 两套常见 PCF8574→HD44780 接线（背光位都在 bit3 / bit7 两种）
|
||||
struct PinMap {
|
||||
uint8_t rs;
|
||||
@@ -30,9 +38,12 @@ struct DemoMsg {
|
||||
const char *line1;
|
||||
};
|
||||
|
||||
static char g_demo_sda[17];
|
||||
static char g_demo_scl[17];
|
||||
|
||||
static const DemoMsg DEMOS[] = {
|
||||
{"Hello CYD!", "LCD1602A I2C"},
|
||||
{"SDA=GPIO22", "SCL=GPIO27"},
|
||||
{g_demo_sda, g_demo_scl},
|
||||
{"Turn blue pot", "for contrast!"},
|
||||
{"Backlight ON", "Touch UI demo"},
|
||||
};
|
||||
@@ -50,9 +61,9 @@ static uint8_t bit_of(uint8_t idx) { return (uint8_t)(1u << idx); }
|
||||
static uint8_t bl_mask() { return g_bl ? bit_of(pm().bl) : 0; }
|
||||
|
||||
static bool i2c_write(uint8_t data) {
|
||||
Wire.beginTransmission(g_addr);
|
||||
Wire.write(data);
|
||||
return Wire.endTransmission() == 0;
|
||||
LCD_WIRE.beginTransmission(g_addr);
|
||||
LCD_WIRE.write(data);
|
||||
return LCD_WIRE.endTransmission() == 0;
|
||||
}
|
||||
|
||||
static uint8_t pack_nibble(uint8_t nibble_hi_or_val, uint8_t mode_rs) {
|
||||
@@ -131,8 +142,8 @@ static void write_row(uint8_t row) {
|
||||
}
|
||||
|
||||
static bool probe_addr(uint8_t addr) {
|
||||
Wire.beginTransmission(addr);
|
||||
return Wire.endTransmission() == 0;
|
||||
LCD_WIRE.beginTransmission(addr);
|
||||
return LCD_WIRE.endTransmission() == 0;
|
||||
}
|
||||
|
||||
// 严格按 LiquidCrystal_I2C::begin 时序
|
||||
@@ -164,14 +175,17 @@ static void apply_lines() {
|
||||
}
|
||||
|
||||
void lcd_init() {
|
||||
snprintf(g_demo_sda, sizeof(g_demo_sda), "SDA=GPIO%d", LCD_I2C_SDA_PIN);
|
||||
snprintf(g_demo_scl, sizeof(g_demo_scl), "SCL=GPIO%d", LCD_I2C_SCL_PIN);
|
||||
|
||||
memset(g_lines, 0, sizeof(g_lines));
|
||||
pad_copy(g_lines[0], "LCD1602A");
|
||||
pad_copy(g_lines[1], "turn blue pot");
|
||||
|
||||
Wire.end();
|
||||
LCD_WIRE.end();
|
||||
delay(2);
|
||||
Wire.begin(LCD_I2C_SDA_PIN, LCD_I2C_SCL_PIN);
|
||||
Wire.setClock(LCD_I2C_FREQ_HZ);
|
||||
LCD_WIRE.begin(LCD_I2C_SDA_PIN, LCD_I2C_SCL_PIN);
|
||||
LCD_WIRE.setClock(LCD_I2C_FREQ_HZ);
|
||||
delay(50);
|
||||
|
||||
g_ok = false;
|
||||
|
||||
@@ -7,7 +7,7 @@
|
||||
#include "ui.h"
|
||||
|
||||
static constexpr uint32_t DRAW_BUF_SIZE =
|
||||
(SCREEN_WIDTH * SCREEN_HEIGHT / 10 * (LV_COLOR_DEPTH / 8));
|
||||
(SCREEN_WIDTH * SCREEN_HEIGHT / DRAW_BUF_DIV * (LV_COLOR_DEPTH / 8));
|
||||
static uint32_t draw_buf[DRAW_BUF_SIZE / 4];
|
||||
|
||||
void setup() {
|
||||
|
||||
192
src/touch.cpp
192
src/touch.cpp
@@ -3,10 +3,13 @@
|
||||
|
||||
#include <Arduino.h>
|
||||
|
||||
#if defined(CYD_BOARD_3248S035)
|
||||
#include <Wire.h>
|
||||
#endif
|
||||
|
||||
/**
|
||||
* SoftSPI XPT2046
|
||||
* BL↔TR 是矩形主对角线镜像（XY 对调），不是 180°（180° 会搞成 TL↔BR）。
|
||||
* 先按 rot2 得到旧 UI，再做对角修正，反变换喂给 LVGL 270。
|
||||
* 2.8": dedicated SoftSPI + BL/TR diagonal fix.
|
||||
* 3.5C (3248S035C): capacitive GT911 on I2C SDA33/SCL32/INT21/RST25.
|
||||
*/
|
||||
|
||||
int16_t g_dbg_phys_x = -1;
|
||||
@@ -15,6 +18,174 @@ int16_t g_dbg_logic_x = -1;
|
||||
int16_t g_dbg_logic_y = -1;
|
||||
bool g_dbg_touch_down = false;
|
||||
|
||||
static int16_t clampi(int32_t v, int32_t lo, int32_t hi) {
|
||||
if (v < lo) {
|
||||
return (int16_t)lo;
|
||||
}
|
||||
if (v > hi) {
|
||||
return (int16_t)hi;
|
||||
}
|
||||
return (int16_t)v;
|
||||
}
|
||||
|
||||
#if defined(CYD_BOARD_3248S035)
|
||||
|
||||
/* Minimal GT911 — no config rewrite (TAMC setResolution can hang Wire). */
|
||||
static uint8_t s_gt_addr = 0x5D;
|
||||
static constexpr uint16_t GT_POINT_INFO = 0x814E;
|
||||
static constexpr uint16_t GT_POINT_1 = 0x814F;
|
||||
|
||||
static bool gt_write8(uint16_t reg, uint8_t val) {
|
||||
Wire.beginTransmission(s_gt_addr);
|
||||
Wire.write((uint8_t)(reg >> 8));
|
||||
Wire.write((uint8_t)(reg & 0xFF));
|
||||
Wire.write(val);
|
||||
return Wire.endTransmission() == 0;
|
||||
}
|
||||
|
||||
static bool gt_read(uint16_t reg, uint8_t *buf, uint8_t len) {
|
||||
Wire.beginTransmission(s_gt_addr);
|
||||
Wire.write((uint8_t)(reg >> 8));
|
||||
Wire.write((uint8_t)(reg & 0xFF));
|
||||
if (Wire.endTransmission(false) != 0) {
|
||||
return false;
|
||||
}
|
||||
const uint8_t n = Wire.requestFrom(s_gt_addr, len);
|
||||
if (n != len) {
|
||||
return false;
|
||||
}
|
||||
for (uint8_t i = 0; i < len; i++) {
|
||||
buf[i] = Wire.read();
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool gt_probe(uint8_t addr) {
|
||||
Wire.beginTransmission(addr);
|
||||
return Wire.endTransmission() == 0;
|
||||
}
|
||||
|
||||
/* TAMC-compatible address select: INT low => 0x5D, INT high => 0x14 */
|
||||
static void gt_hw_reset(bool addr_0x14) {
|
||||
pinMode(CYD_GT911_INT, OUTPUT);
|
||||
pinMode(CYD_GT911_RST, OUTPUT);
|
||||
digitalWrite(CYD_GT911_INT, LOW);
|
||||
digitalWrite(CYD_GT911_RST, LOW);
|
||||
delay(10);
|
||||
digitalWrite(CYD_GT911_INT, addr_0x14 ? HIGH : LOW);
|
||||
delay(1);
|
||||
digitalWrite(CYD_GT911_RST, HIGH);
|
||||
delay(5);
|
||||
digitalWrite(CYD_GT911_INT, LOW);
|
||||
delay(50);
|
||||
/* Backlight is GPIO27 — leave INT as input for polling.
|
||||
* GPIO21 is also LCD SCL on 3.5; must not hold it as OUTPUT HIGH. */
|
||||
pinMode(CYD_GT911_INT, INPUT);
|
||||
delay(50);
|
||||
}
|
||||
|
||||
static bool gt_find_addr() {
|
||||
for (uint8_t a : {uint8_t(0x5D), uint8_t(0x14)}) {
|
||||
if (gt_probe(a)) {
|
||||
s_gt_addr = a;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
void touch_init() {
|
||||
Serial.println("Touch: GT911 I2C capacitive (3.5C) minimal");
|
||||
Wire.begin(CYD_GT911_SDA, CYD_GT911_SCL);
|
||||
Wire.setClock(100000);
|
||||
#if defined(WIRE_HAS_TIMEOUT) || defined(ESP32)
|
||||
Wire.setTimeOut(50);
|
||||
#endif
|
||||
|
||||
if (!gt_find_addr()) {
|
||||
Serial.println("GT911 not found — hw reset 0x5D");
|
||||
gt_hw_reset(false);
|
||||
if (!gt_find_addr()) {
|
||||
Serial.println("GT911 not found — hw reset 0x14");
|
||||
gt_hw_reset(true);
|
||||
gt_find_addr();
|
||||
}
|
||||
}
|
||||
|
||||
Serial.printf("GT911 probe 0x5D=%s 0x14=%s using=0x%02X\n",
|
||||
gt_probe(0x5D) ? "OK" : "no", gt_probe(0x14) ? "OK" : "no",
|
||||
s_gt_addr);
|
||||
Serial.printf("GT911 SDA=%d SCL=%d INT=%d RST=%d\n", CYD_GT911_SDA,
|
||||
CYD_GT911_SCL, CYD_GT911_INT, CYD_GT911_RST);
|
||||
}
|
||||
|
||||
void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
|
||||
uint8_t info = 0;
|
||||
static uint32_t last_log = 0;
|
||||
const bool do_log = (millis() - last_log > 200);
|
||||
|
||||
if (!gt_read(GT_POINT_INFO, &info, 1)) {
|
||||
data->state = LV_INDEV_STATE_RELEASED;
|
||||
g_dbg_touch_down = false;
|
||||
if (do_log) {
|
||||
last_log = millis();
|
||||
Serial.println("TouchProbe GT911 I2C err");
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
const uint8_t touches = info & 0x0F;
|
||||
const bool buffered = (info & 0x80) != 0;
|
||||
|
||||
if (!buffered || touches == 0) {
|
||||
if (buffered) {
|
||||
gt_write8(GT_POINT_INFO, 0);
|
||||
}
|
||||
data->state = LV_INDEV_STATE_RELEASED;
|
||||
g_dbg_touch_down = false;
|
||||
return;
|
||||
}
|
||||
|
||||
uint8_t pt[7];
|
||||
if (!gt_read(GT_POINT_1, pt, 7)) {
|
||||
gt_write8(GT_POINT_INFO, 0);
|
||||
data->state = LV_INDEV_STATE_RELEASED;
|
||||
g_dbg_touch_down = false;
|
||||
return;
|
||||
}
|
||||
gt_write8(GT_POINT_INFO, 0);
|
||||
|
||||
const int16_t raw_x = (int16_t)(pt[1] | (pt[2] << 8));
|
||||
const int16_t raw_y = (int16_t)(pt[3] | (pt[4] << 8));
|
||||
|
||||
/* Native 320x480 → LVGL 270. Mirror long axis so L/R matches UI
|
||||
* (else preset 3 hits 10). Resulting UI ≈ (H-1-raw_y, raw_x). */
|
||||
const int16_t nx = clampi(raw_x, 0, SCREEN_WIDTH - 1);
|
||||
const int16_t ny = clampi(raw_y, 0, SCREEN_HEIGHT - 1);
|
||||
const int16_t feed_x = (int16_t)((SCREEN_WIDTH - 1) - nx);
|
||||
const int16_t feed_y = (int16_t)((SCREEN_HEIGHT - 1) - ny);
|
||||
const int16_t ui_x = (int16_t)((SCREEN_HEIGHT - 1) - ny);
|
||||
const int16_t ui_y = nx;
|
||||
|
||||
g_dbg_phys_x = raw_x;
|
||||
g_dbg_phys_y = raw_y;
|
||||
g_dbg_logic_x = ui_x;
|
||||
g_dbg_logic_y = ui_y;
|
||||
g_dbg_touch_down = true;
|
||||
|
||||
if (do_log) {
|
||||
last_log = millis();
|
||||
Serial.printf("Touch HIT GT911 raw(%d,%d) ~ui(%d,%d)\n", raw_x, raw_y,
|
||||
ui_x, ui_y);
|
||||
}
|
||||
|
||||
data->point.x = feed_x;
|
||||
data->point.y = feed_y;
|
||||
data->state = LV_INDEV_STATE_PRESSED;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static void soft_write(uint8_t data) {
|
||||
for (int i = 7; i >= 0; --i) {
|
||||
digitalWrite(CYD_TOUCH_MOSI, (data >> i) & 1);
|
||||
@@ -49,16 +220,6 @@ static uint16_t xpt_read(uint8_t cmd) {
|
||||
return v;
|
||||
}
|
||||
|
||||
static int16_t clampi(int32_t v, int32_t lo, int32_t hi) {
|
||||
if (v < lo) {
|
||||
return (int16_t)lo;
|
||||
}
|
||||
if (v > hi) {
|
||||
return (int16_t)hi;
|
||||
}
|
||||
return (int16_t)v;
|
||||
}
|
||||
|
||||
void touch_init() {
|
||||
pinMode(CYD_TOUCH_CS, OUTPUT);
|
||||
pinMode(CYD_TOUCH_CLK, OUTPUT);
|
||||
@@ -94,8 +255,6 @@ void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
|
||||
x = clampi(x, 0, SCREEN_WIDTH - 1);
|
||||
y = clampi(y, 0, SCREEN_HEIGHT - 1);
|
||||
|
||||
// 旧 UI（LVGL270）：(y, 239-x) — 该空间里 BL↔TR，做主对角线镜像
|
||||
// (ux,uy) -> (uy*(319/239), ux*(239/319))
|
||||
const int32_t old_ux = y;
|
||||
const int32_t old_uy = (SCREEN_WIDTH - 1) - x;
|
||||
int16_t ui_x = clampi((old_uy * (UI_HOR_RES - 1)) / (UI_VER_RES - 1), 0,
|
||||
@@ -103,7 +262,6 @@ void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
|
||||
int16_t ui_y = clampi((old_ux * (UI_VER_RES - 1)) / (UI_HOR_RES - 1), 0,
|
||||
UI_VER_RES - 1);
|
||||
|
||||
// 反变换喂 LVGL，使最终落在 (ui_x, ui_y)
|
||||
const int16_t feed_x = (int16_t)((SCREEN_WIDTH - 1) - ui_y);
|
||||
const int16_t feed_y = ui_x;
|
||||
|
||||
@@ -123,3 +281,5 @@ void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
|
||||
data->point.y = feed_y;
|
||||
data->state = LV_INDEV_STATE_PRESSED;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
19
src/ui.cpp
19
src/ui.cpp
@@ -179,17 +179,18 @@ void ui_create() {
|
||||
lv_obj_set_style_text_font(lbl_line1, &lv_font_montserrat_18, 0);
|
||||
lv_obj_align(lbl_line1, LV_ALIGN_TOP_MID, UX(0), UY(116));
|
||||
|
||||
const int16_t gap = 8;
|
||||
const int16_t bw = (UI_HOR_RES - 48 - gap) / 2;
|
||||
const int16_t bx0 = 24;
|
||||
const int16_t row0 = 148;
|
||||
const int16_t row1 = 196;
|
||||
const int16_t gap = UW(8);
|
||||
const int16_t bw = (UI_HOR_RES - UW(48) - gap) / 2;
|
||||
const int16_t bx0 = UX(24);
|
||||
const int16_t row0 = UY(148);
|
||||
const int16_t row1 = UY(196);
|
||||
const int16_t bh = UH(40);
|
||||
|
||||
btn_demo = make_btn(scr, "Demo", bx0, row0, bw, 40, on_demo, &lbl_demo);
|
||||
btn_hello = make_btn(scr, "Hello", bx0 + bw + gap, row0, bw, 40, on_hello,
|
||||
btn_demo = make_btn(scr, "Demo", bx0, row0, bw, bh, on_demo, &lbl_demo);
|
||||
btn_hello = make_btn(scr, "Hello", bx0 + bw + gap, row0, bw, bh, on_hello,
|
||||
nullptr);
|
||||
btn_map = make_btn(scr, "Map 0", bx0, row1, bw, 40, on_map, &lbl_map);
|
||||
btn_bl = make_btn(scr, "BL OFF", bx0 + bw + gap, row1, bw, 40, on_bl, &lbl_bl);
|
||||
btn_map = make_btn(scr, "Map 0", bx0, row1, bw, bh, on_map, &lbl_map);
|
||||
btn_bl = make_btn(scr, "BL OFF", bx0 + bw + gap, row1, bw, bh, on_bl, &lbl_bl);
|
||||
|
||||
(void)btn_demo;
|
||||
(void)btn_hello;
|
||||
|
||||
Reference in New Issue
Block a user