一、描述你遇到的问题
短接tx和rx，无法实现自发自收，发送没问题，收不到数据
二、你具体做的所有步骤结果截图
三、当前开发板状态全景照片
四、开发板串口所有日志
[09:39:27.028]收←◆boot.
[09:39:27.077]收←◆Flash Init Fail! ret = 0x80001341
verify_public_rootkey secure verify disable!
verify_params_key_area secure verify disable!
verify_params_area_info secure verify disable!
verify_image_key_area secure verify disable!
verify_image_code_info secure verify disable!
[09:39:27.159]收←◆SSB Uart Init Succ!
SSB Flash Init Succ!
verify_image_key_area secure verify disable!
verify_image_code_info secure verify disable!
Flashboot Uart Init Succ!
Flashboot Malloc Init Succ!
Flash Init Succ!
No need to fix SR!
io level work in hw mode, level[chip]:0x33
flashboot version : 1.10.102
[UPG] upgrade init OK!
No need to upgrade...
flash_encrypt disable.
verify_image_key_area secure verify disable!
verify_image_code_info secure verify disable!
[09:39:27.638]收←◆APP|dbg uart init ok.
[UPG] upgrade init OK!
APP|init_sle_mac failed!!!
APP|init_dev_addr, mac_addr:0xad,0x 0,0x73,0x6f,0x**,0x**,
xo_trim_temp_comp val:0 0
los_at_plt_cmd_register EXCUTE
APP|thread[11] func null
cpu 0 entering scheduler
[09:39:27.724]收←◆APP|btc open
[RADAR_LOG] alg ctrl read from nv [1][2][0][0][1][1][20]
device_main_init: 0!
===hal_initialize_phy===226===
device_module_init:: succ!
cali_set_cali_mask:old[0x0] -> new[0x1fa2]
fe_rf_initialize
cali_offline_cali_entry enter
cali_set_cali_done_flag:old[0x0] -> new[0x1]
rf cali OK. time cost:21, ret:0
[09:39:28.733]收←◆uart1 poll mode send start!, len = 512
send data size 14
uart1 poll mode send back succ! 14
[09:39:28.987]收←◆read data size 0
[09:39:29.994]收←◆uart1 poll mode send start!, len = 512
send data size 14
uart1 poll mode send back succ! 14
[09:39:30.247]收←◆read data size 0
[09:39:31.253]收←◆uart1 poll mode send start!, len = 512
send data size 12
uart1 poll mode send back succ! 12
[09:39:31.506]收←◆read data size 0
[09:39:31.654]收←◆xo update temp:3,diff:0,xo:0x3083c