CAJ | 학술논문

STM32系统的C语言中并未提供直接操作位的方法，需要使用复合语句实现位操作，程序执行效率低。位带技术是一种内存映射技术，将位带区的一“位”映射到位带别名区的一个“字”，通过对位带别名区“字”的读取和写入来改变位带区“位”的数值。在嵌入式程序设计中使用位带技术，可以降低代码占用空间，提高程序执行效率，特别适合于大量使用标志位或频繁操作IO口单个引脚的场合。
STM32계통적C어언중병미제공직접조작위적방법，수요사용복합어구실현위조작，정서집행효솔저。위대기술시일충내존영사기술，장위대구적일“위”영사도위대별명구적일개“자”，통과대위대별명구“자”적독취화사입래개변위대구“위”적수치。재감입식정서설계중사용위대기술，가이강저대마점용공간，제고정서집행효솔，특별괄합우대량사용표지위혹빈번조작IO구단개인각적장합。
It's very difficult to single bit write and read operations in C programming .The low efficiency of program execution is associated with the read-write operation.The Cortex-M3 memory map includes two bit-band regions.These regions map each word in an alias region of memory to a bit in a bit-band region of memory.Writing to a word in the alias region has the same effect as a read-write operation on the targeted bit in the bit-band region.It can reduce the code space and improve the efficiency of pro-gram execution by using the bit-band technology.