1.增加PWM捕获demo 2.OTP烧录校验值输出log不对应烧录初始值，将其更改为小端输出对应烧录初始值
Review Request #3150 — Created Sept. 10, 2021 and submitted — Latest diff uploaded
| Information | |
|---|---|
| yangzhengfeng | |
| Yc3121 | |
| Reviewers | |
| taoqiwen, wushengyan | |
1.增加PWM捕获demo
2.OTP烧录校验值输出log不对应烧录初始值，将其更改为小端输出对应烧录初始值