demo更新及优化

Review Request #4698 — Created Aug. 5, 2022 and submitted — Latest diff uploaded

taoqiwen
Yc3121
taoqiwen, wushengyan

1、处理各demo中未使用变量导致的警告
2、处理各demo中传参类型不匹配导致的警告
3、修复因SDK库更新导致的keil、及gcc编译工程报错问题



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