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我意思用软件模拟I2C的话是不是RemoTI-CC253xDK-1.3.1项目里的hal_i2c.c文件可用，CC2541和CC2540区别是 you’re concerned with active power consumption, use CC2541, as it will save you 30% in TX and around 10% in RX.
If you need +4 dBm output power, you should choose the CC2540.
If you need a USB interface, you should choose the CC2540.
If you need I2C, you should choose the CC2541.
If you want to communicate using a proprietary protocol, you should choose the CC2541.
If none of the above apply, it doesn’t matter which one you choose.
If cost is important, CC2541 is priced slightly lower than CC2540.这些吧其他通用的吧
