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cc1120问题请教

亲爱的TI员工:你们好!

我在使用CC1120做数据收发,遇到的问题如下:

1.如果我只CC1120当做射频前端的处理器,收到的数据经过CC1120处理后给单片机处理,单片机负责数据的解析(包括接交织、FEC、CRC、白化等),那么我该选用那种模式呢?需要读取内部的FIFO数据吗?还是通过GPIO口直接输出?

2.那么在发射模式,所有的交织、FEC、CRC、白化等有单片机处理,处理好的数据直接给CC1120,该用什么模式呢?需要写入内部的FIFO数据吗?还是通过GPIO口直接输入?

3.发射模式调制使用的是I/Q调制还是两点调制?

2 个回复

  • 你看一下下面这两个模式

    1、Transparent serial mode 比较合适
    In transparent serial mode (PKT_CFG2.PKT_FORMAT = 11b ) the CC112X is configured to resemble a legacy analog RF front end device. In this mode data is only filtered through the channel filter and the hard limited baseband signal is output directly on a GPIO pin. No symbol rate recovery or bit timing is performed by the radio.

    Transparent mode can be used for applications that have packet formats incompatible with the built-in demodulator. Examples are pulse width modulation and pulse position modulation. When using transparent mode, the demodulation must be performed by the MCU.

    2、FIFO Mode/Normal Mode
    FIFO mode is the preferred mode of operation. In this mode data is read from the RX FIFO and written to the TX FIFO, making the data transfer to/from the MCU less time critical compared to what is the case in the other modes. Using the FIFOs to buffer data allows the MCU to be in sleep mode during RX/TX, reducing system power consumption.

    In FIFO mode, sync and preamble insertion/detection are done automatically, and several other optional packet handling features are supported in this mode. FIFO mode/Normal mode is enabled by setting PKT_CFG2.PKT_FORMAT = 0.

    更多的介绍及配置方式请参考用户手册: www.ti.com.cn/.../swru295e.pdf

    若该回复解决了您的问题,请点击“确认此为答案”,谢谢。

     

  • 回复 Viki Shi:

    Hi Viki:

      

        谢谢你的答复,那么在透明模式下,数据通过制定的GPIO口直接输出/输入给MCU处理,是这个意思吗?数据的输入/输出需要时钟CLK吗?

       还有透明模式下,“No symbol rate recovery or bit timing is performed by the radio. ” 这句话是什么意思呢,谢谢!