AD9361正常更改射频频率需要设置一些寄存器,然后开启VCO校准,等待锁定。这个过程时间是比较长的,大概在37us~508us之间。如果你的系统是一个跳频的TDD系统,那相当于每个时隙都要浪费这个时间等待VCO锁定,开销实在太大。为了解决这个问题,就需要用到Fast Lock功能。简单点说就是提前校准好每个频点的参数保存起来,下次要用...
在Fast Lock下,对于配置文件profile的构建,最后两个config Word是通过读取寄存器得到吗,,最后两个config Word是关于VCO校准结果的,详情在下图 ...
ad9361fastlock模式下快速校准VCO。在FDD模式下校准完后TX发射出的频点偏移了一点。最多偏移了7M。流程是先通过FDD模式用常规校准完成后,TX的发射出来的频点并没有偏移,此时 AD9364/Ad9361的FastLock模式的使用 在FastLock下,对于配置文件profile的构建,最后两个config Word是通过读取寄存器得到吗,,最后两个config Wo...
int32_t ad9361_tx_fastlock_save(struct ad9361_rf_phy *phy, uint32_t profile, uint8_t *values) Saves TX fastlock profile. In order to use more than 8 Profiles, an existing profile can be read back and stored by the user application. Receives as parameters a structure that contains ...
voltage1_TX_LO_fastlock_load -rw-r--r-- 1 root root 4096 Jan 15 13:49 out_altvoltage1_TX_LO_fastlock_recall -rw-r--r-- 1 root root 4096 Jan 15 13:49 out_altvoltage1_TX_LO_fastlock_save -rw-r--r-- 1 root root 4096 Jan 15 13:49 out_altvoltage1_TX_LO_fastlock_...
When in fastlock pin select mode (adi,[tx|rx]-fastlock-pincontrol-enable). This file needs to be written once with a value, before the pin-control can be used. This will moves the device into fastlock mode. This specifies any shell prompt running on the target ...
3513 int32_t ad9361_fastlock_load(struct ad9361_rf_phy *phy, bool tx 3492 - uint32_t profile uint8_t *values); 3514 + uint32_t profile, uint8_t *values); 3493 3515 32_t ad9361_fastlock_save(struct ad9361_rfphy *phy, bool tx, 3494 - uint32_t profile uint8_t...
The datasheet says AD9361 support up to 50MHz SPI clock…s So, assume our SPI clock is 50MHz for the following questions Q: How many bits does profile consist of? How long would it take to load 5 profiles to AD9361 fast lock memory space from BBP memory at once?
ad9361 fast lock 模式下快速校准VCO。在FDD模式下校准完后TX发射出的频点偏移了一点。最多偏移了7M。流程是先通过FDD模式用常规校准完成后,TX的发射出来的频点并没有偏 ...
前面讲到每个profile由16个8bit寄存器组成,TX和RX的定义是一样的,下面列出RX profile每个寄存器的定义: REG0 ~ REG4以及REG12[3:0]实际上是3个参数,lo_int( Integer Word),lo_frac(Fractional Word),lo_div(VCO Divider),射频频率计算公式如下: