非接射频523的Linux驱动源码，在公司的POS产品中运行稳定运行多年，已经得到了时间的验证，代码逻辑严谨，运行稳定。-A radio frequency (rf), 523 Linux driver source code, in the company s POS products running in the stable operation for many years, has been validated by the time, code logic is rigorous, s