From 2c5ab39935778cc8523b435f9a3fe86ebf215808 Mon Sep 17 00:00:00 2001
From: Juwan <junhuanchen@qq.com>
Date: Sun, 10 Jul 2022 20:23:33 +0800
Subject: [PATCH] [fix gpio]

---
 docs/soft/maixpy3/zh/usage/hardware/GPIO.ipynb          | 6 +++---
 docs/soft/maixpy3/zh/usage/vision/maixpy3-example.ipynb | 4 +++-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/docs/soft/maixpy3/zh/usage/hardware/GPIO.ipynb b/docs/soft/maixpy3/zh/usage/hardware/GPIO.ipynb
index e3211ca1..6f67367e 100644
--- a/docs/soft/maixpy3/zh/usage/hardware/GPIO.ipynb
+++ b/docs/soft/maixpy3/zh/usage/hardware/GPIO.ipynb
@@ -121,9 +121,9 @@
    "source": [
     "import time\n",
     "class BUTTON:\n",
-    "    def __init__(self, line, bank, chip, mode):\n",
+    "    def __init__(self, line, bank, chip=1, mode=2):\n",
     "        from maix import gpio\n",
-    "        self.button = gpio.gpio.gpio(line, bank, chip, mode)\n",
+    "        self.button = gpio.gpio(line, bank, chip, mode)\n",
     "    def is_pressed(self):\n",
     "        if self.button.get_value() != 1:\n",
     "            return True\n",
@@ -131,7 +131,7 @@
     "        self.button.release()\n",
     "\n",
     "global key\n",
-    "key = BUTTON(6, 2)\n",
+    "key = BUTTON(6, \"H\")\n",
     "print(key.button.source)"
    ]
   },
diff --git a/docs/soft/maixpy3/zh/usage/vision/maixpy3-example.ipynb b/docs/soft/maixpy3/zh/usage/vision/maixpy3-example.ipynb
index b7a9db15..4db72a90 100644
--- a/docs/soft/maixpy3/zh/usage/vision/maixpy3-example.ipynb
+++ b/docs/soft/maixpy3/zh/usage/vision/maixpy3-example.ipynb
@@ -671,7 +671,9 @@
    "source": [
     "## 【传统视觉基础】寻线寻迹\n",
     "\n",
-    "找线算法是面对小车寻线而开发的一个算法。主要的流程是，灰度化 -> 自适应阈值处理 -> 形态学运算 -> 图像最小二乘法。完成算法流程后返回一条线的信息，让小车能够根据识别出来线的信息进行运动。这个接口比较适合做图像寻线。\n"
+    "找线算法是面对小车寻线而开发的一个算法。主要的流程是，灰度化 -> 自适应阈值处理 -> 形态学运算 -> 图像最小二乘法。完成算法流程后返回一条线的信息，让小车能够根据识别出来线的信息进行运动。这个接口比较适合做图像寻线。\n",
+    "\n",
+    "对应实现 https://github.com/sipeed/MaixPy3/blob/release/ext_modules/_maix_image/_maix_vision.cpp#L513-L612\n"
    ]
   },
   {