1、蓝牙芯片YC1021开发资料 2、MCU通过串口与YC1021通讯 3、蓝牙协议栈等都在YC1021端完成，所以主机只需要解析处理好与YC1021之间的通讯协议即可 4、建议用状态机来做 5、YC1021跟BM77通讯差不多，只要搞定一个，另外一款就很容易了

Yichip YC1021蓝牙芯片数据手册以及管脚定义，网上根本下载不到。General Description The YC1021 is a very low power, high performance and highly integrated Bluetooth 4.2 BR/EDR + BLE + 2.4G Proprietary triple-mode solution, designed for operation over the 2400MHz to 2483.5Mhz ISM frequency band. YC1021 is manufactured using advanced 55nm CMOS low leakage process, which offers highest integration, lowest power consumption, lowest leakage current and reduced BOM cost while simplifying the overall system design. Rich peripherals including an 8 channel general purpose ADC, power-on-reset (POR), Arithmetic Accelerators, 3axis Q-decoder, ISO7816, UART/SPI/I2C and up to 32 GPIOs, which further reduce overall system cost and size.

这份代码是我自己根据易兆微yc1021的规格书实现的一份嵌入式驱动程序，用户只需要移植几个简单的函数就可以实现蓝牙3.0和4.0通信功能，这么简单的玩意儿天天搞真的烦，下载源码一次搞定多好对吧