CC1312R: 这么在代码中动态设置射频频率？

// CMD_FS
// Frequency Synthesizer Programming Command
rfc_CMD_FS_t RF_cmdFs_slr2500bps2gfsk433mhz_0 =
{
    .commandNo = 0x0803,
    .status = 0x0000,
    .pNextOp = 0,
    .startTime = 0x00000000,
    .startTrigger.triggerType = 0x0,
    .startTrigger.bEnaCmd = 0x0,
    .startTrigger.triggerNo = 0x0,
    .startTrigger.pastTrig = 0x0,
    .condition.rule = 0x1,
    .condition.nSkip = 0x0,
    .frequency = 0x01BC,
    .fractFreq = 0x0000,
    .synthConf.bTxMode = 0x0,
    .synthConf.refFreq = 0x0,
    .__dummy0 = 0x00,
    .__dummy1 = 0x00,
    .__dummy2 = 0x00,
    .__dummy3 = 0x0000
};

ti_radio_config.c中这段包含了频率信息，如果要在代码中动态设置的话，要怎么操作，频率设置是否有step限制？