AWR1843: chirp相位改变相关问题

user4162505

Prodigy 240 points

Part Number: AWR1843

lab011中的那个获取相位改变参数的函数Get_PhaseTxShifterCodeValue中：

（1）获取的三个天线的相位值*tx1PhShCode\*tx2PhShCode\*tx3PhShCode 需要左移2位处理么？我看资料里面介绍说这相位值是放在高6位的（即该值左移2位处理的）。。。

（2）不能直接将tx_phaseShift_CodeLUT[index].tx1_phsh_deg 赋值给 *tx1PhShCode ？？下边这样处理是何意？？

2 年多前

0 Chris Meng 2 年多前

TI__Guru**** 152613 points

user4162505 说：
（1）获取的三个天线的相位值*tx1PhShCode\*tx2PhShCode\*tx3PhShCode 需要左移2位处理么？

是的，数据结构rlRfPhaseShiftCfg里的相位偏移元素是需要左移2 bit的。

typedef struct rlRfPhaseShiftCfg
{
/**
* @brief Chirp Start Index, Valid Range 0 -511
*/
rlUInt16_t chirpStartIdx;
/**
* @brief Chirp End Index, Valid Range from chirpStartIdx to 511
*/
rlUInt16_t chirpEndIdx;
#ifndef MMWL_BIG_ENDIAN
/**
* @brief TX0 phase shift definition \n
[b1:0] reserved (set it to 0b00) \n
[b7:2] TX0 phase shift value \n
1 LSB = 360/2^6 = 5.625 degrees\n
Valid range: 0 to 63 \n
*/
rlUInt8_t tx0PhaseShift;
/**
* @brief TX1 phase shift definition \n
[b1:0] reserved (set it to 0b00) \n
[b7:2] TX1 phase shift value \n
1 LSB = 360/2^6 = 5.625 degrees\n
Valid range: 0 to 63 \n
*/
rlUInt8_t tx1PhaseShift;
/**
* @brief TX2 phase shift definition \n
[b1:0] reserved (set it to 0b00) \n
[b7:2] TX2 phase shift value \n
1 LSB = 360/2^6 = 5.625 degrees\n
Valid range: 0 to 63 \n
*/
rlUInt8_t tx2PhaseShift;