Search found 3 matches

by TopologicalDragon
Fri Apr 01, 2022 4:34 pm
Forum: ESP-IDF 中文讨论版
Topic: ESP32、ESP32-S3 是否有类似ARM的位带操作
Replies: 2
Views: 2354

Re: ESP32、ESP32-S3 是否有类似ARM的位带操作

非常感谢,不过,我这里需要的是对片上ram中的数据进行指定位读,而不是外设的映射。
据您所说似乎没有这种特性?
by TopologicalDragon
Thu Mar 31, 2022 11:13 am
Forum: ESP-IDF
Topic: Does ESP32-S3 supports any functions like Bit-band operation?
Replies: 1
Views: 1203

Does ESP32-S3 supports any functions like Bit-band operation?

I have to do some operates like “read a large number of specific bits in the callback”, and they usually has a time cost limit. :cry:
So is there a function or a memory region like Bit-band operation that I can directly read/write a bit by accessing a special address?
(esp-idf released/v4.4)
by TopologicalDragon
Thu Mar 31, 2022 10:48 am
Forum: ESP-IDF 中文讨论版
Topic: ESP32、ESP32-S3 是否有类似ARM的位带操作
Replies: 2
Views: 2354

ESP32、ESP32-S3 是否有类似ARM的位带操作

目前有个项目不可避免的要在中断函数内处理大量位操作。为了减少开销,我们想知道ESP32、ESP32-S3,是否有类似ARM的位带区和位带别名区,或者类似的区域能够通过地址直接读取数据的某一位?
目前使用的版本是release/v4.4 在 ESP32-S3上。