first commit

i2c_scan.sh

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+#!/bin/bash
+# i2c_scan_all.sh - 扫描当前系统所有 I2C 总线上的设备
+
+set -e
+
+if ! command -v i2cdetect >/dev/null 2>&1; then
+    echo "未找到 i2cdetect，请先安装 i2c-tools："
+    echo "  sudo apt install i2c-tools"
+    exit 1
+fi
+
+echo "列出 I2C 总线："
+i2cdetect -l
+echo
+
+buses=$(i2cdetect -l | awk '{print $1}' | sed 's/i2c-//')
+
+for bus in $buses; do
+    echo "==============================="
+    echo "扫描 I2C bus $bus (/dev/i2c-$bus)"
+    echo "==============================="
+    i2cdetect -y "$bus"
+    echo
+done