Various matrix keyboard scanning program collections The simplest matrix keyboard scanning program key:mov p0,#00001111b;The upper four bits and the lower four bits are rows and columns respectively,
[Announcement] Each section is recruiting moderators! Hello everyone! This community is now looking for moderators for each forum. If you are interested, please write your application content and send
In the official file-operation example, when single-stepping into the WriteFileToDevice() function, lRetVal = sl_FsOpen (create file mode), the return value after running is less than 0, and then it e