以下是使用 JavaScript 和 Canvas 绘制方位图并标注刻度的示例代码：
<!DOCTYPE html>
<html>
<head>
<title>方位图</title>
<style>
canvas {
border: 1px solid #000;
}
</style>
</head>
<body>
<canvas id="compass" width="400" height="400"></canvas>
<script>
// 获取 canvas 元素
const canvas = document.getElementById("compass");
const ctx = canvas.getContext("2d");
// 设置画布属性
const centerX = canvas.width / 2;
const centerY = canvas.height / 2;
const radius = Math.min(centerX, centerY) - 10;
// 清空画布
ctx.clearRect(0, 0, canvas.width, canvas.height);
// 绘制方位图外圆
ctx.beginPath();
ctx.arc(centerX, centerY, radius, 0, Math.PI * 2);
ctx.stroke();
// 绘制刻度
for (let i = 0; i <= 360; i += 15) {
const angle = ((i - 90) * Math.PI) / 180; // 将角度转换为弧度，将起始位置调整为正上方
const startX = centerX + (radius - 20) * Math.cos(angle);
const startY = centerY + (radius - 20) * Math.sin(angle);
const endX = centerX + radius * Math.cos(angle);
const endY = centerY + radius * Math.sin(angle);
ctx.beginPath();
ctx.moveTo(startX, startY);
ctx.lineTo(endX, endY);
ctx.stroke();
// 标注刻度值
ctx.font = "12px Arial";
ctx.fillStyle = "#000";
const textX = centerX + (radius - 40) * Math.cos(angle);
const textY = centerY + (radius - 40) * Math.sin(angle);
ctx.fillText(i.toString(), textX, textY);
}
</script>
</body>
</html>
此代码会绘制一个半径为 radius 的圆，以 (centerX, centerY) 为中心点。然后在圆上绘制刻度，并标注对应的角度值。
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![/data # iw --debug dev wlan0 connect -w lucky-5g auth open key 0:1234567890
Usage: iw [options] dev connect [-w] [] [] [auth open|shared] [key 0:abcde d:1:6162636465] [mfp:req/opt/no]
Join the network with th...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162224509509129.png)
![/data # iw --debug dev wlan0 connect -w "lucky-5g" auth open key 0:1234567890
Usage: iw [options] dev connect [-w] [] [] [auth open|shared] [key 0:abcde d:1:6162636465] [mfp:req/opt/no]
Join the network with ...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162239148267954.png)
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void kalRxTaskletSchedule(struct GLUE_INFO *pr)
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tasklet_hi_schedule(&pr->rRxTask[(num++)%NR_CPUS]);
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DBGLOG(HAL, ERROR,](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162226144313964.png)
