支持 Arduino Nano, 2KB 内存

internal/app/appbuild/assets/arduino-host.cpp

@@ -3,8 +3,8 @@
 #include <Arduino.h>
 
 // 配置初始内存
-static uint8_t app_host_memory[{{.MemoryBytes}}];
-static int32_t app_host_memory_page_size = ({{.MemoryBytes}})/(1<<16);
+static uint8_t app_host_memory[1014]; // Arduino Nano 只有2KB内存, 不足1页
+static int32_t app_host_memory_page_size = 0;
 
 // 初始化内存
 extern "C" void app_memory_init(uint8_t** pp_memory, int32_t* page_size) {

waroot/examples/arduino-lcd1602/src/main.wa

@@ -1,10 +1,57 @@
 // 版权 @2025 arduino-lcd1602 作者。保留所有权利。
 
+import (
+	"arduino/lcd1602"
+	"syscall/arduino"
+)
+
+global LED = arduino.GetPinLED()
+
 func init {
-	LCDInit()
-	LCDPrint("Hello Wa-lang")
+	arduino.PinMode(LED, 1)
+	arduino.Print("凹语言(Wa)/Arduino is running ...\n")
+	arduino.Print("https://wa-lang.org\n")
+	arduino.Print("基于wat2c技术\n")
+
+	lcd1602.LCDInit()
 }
 
 func Loop {
-	//
+	const s = "hello wa-lang!"
+
+	arduino.DigitalWrite(LED, arduino.HIGH)
+
+	lcd1602.LCDClear()
+	SayHello(0, 1, s)
+	SayHello(1, 0, s)
+	arduino.Delay(500)
+	arduino.DigitalWrite(LED, arduino.LOW)
+
+	lcd1602.LCDClear()
+	SayHello(0, 1, s)
+	SayHello(1, 1, s)
+	arduino.Delay(500)
+	arduino.DigitalWrite(LED, arduino.HIGH)
+
+	lcd1602.LCDClear()
+	SayHello(0, 1, s)
+	SayHello(1, 2, s)
+	arduino.Delay(500)
+	arduino.DigitalWrite(LED, arduino.LOW)
+
+	lcd1602.LCDClear()
+	SayHello(0, 1, s)
+	SayHello(1, 1, s)
+	arduino.Delay(500)
+	arduino.DigitalWrite(LED, arduino.HIGH)
+}
+
+func SayHello(row, col: i32, s: string) {
+	lcd1602.LCDSetCursor(row, col)
+
+	// Arduino Nano 内存太小, 暂不支持 for range
+
+	for i := 0; i < len(s); i++ {
+		lcd1602.LCDWriteChar(i32(s[i]))
+	}
 }

waroot/examples/arduino/src/main.wa

@@ -8,6 +8,7 @@ func init {
 	arduino.PinMode(LED, 1)
 	arduino.Print("凹语言(Wa)/Arduino is running ...\n")
 	arduino.Print("https://wa-lang.org\n")
+	arduino.Print("基于wat2c技术\n")
 }
 
 func Loop {

waroot/src/arduino/lcd1602/lcd1602.wa

@@ -97,6 +97,10 @@ func LCDPrint(s: string) {
 	}
 }
 
+func LCDWriteChar(ch: rune) {
+	writeChar(byte(ch))
+}
+
 // Claer screen.
 func LCDClear {
 	command(0x01)

waroot/src/base_arduino.wat.ws

@@ -6,6 +6,6 @@
 ;; | 0 <-- stack --> | <-- static-data --> | <-- heap --> |
 ;; +-----------------+---------------------+--------------+
 
-(global $__stack_ptr (mut i32) (i32.const 1024))  ;; 1024
+(global $__stack_ptr (mut i32) (i32.const 128))  ;; 基本用不上
 
 (global $__heap_lfixed_cap i32 (i32.const 0)) ;; 固定尺寸空闲链表最大长度, 满时回收; 也可用于关闭 fixed 策略

waroot/src/src.go

@@ -121,6 +121,9 @@ func GetStdTestPkgList() []string {
 		if strings.HasPrefix(s, "syscall") {
 			continue
 		}
+		if strings.HasPrefix(s, "arduino/") {
+			continue
+		}
 		if s == "js" || strings.HasPrefix(s, "js/") {
 			continue
 		}
@@ -132,6 +135,7 @@ func GetStdTestPkgList() []string {
 var stdPkgs = []string{
 	"ai",              // ?
 	"apple",           // 测试已覆盖, wat2wasm ok
+	"arduino/lcd1602", // Arduino 平台, LCD显示屏
 	"archive/txtar",   // API 完整, wat2wasm ok
 	"bufio",           // API 完整, wat2wasm ok
 	"bytes",           // API 完整, wat2wasm ok