fix pl18 can not use trainer port

[NanoNM]

fix pl18 can not use trainer port

Fixes #6710

Summary of changes:
change radio/targets/pl18/hal.h
origin

#define TRAINER_IN_GPIO                 GPIO_PIN(GPIOD, 12) // PD.12
#define TRAINER_IN_TIMER_Channel        LL_TIM_CHANNEL_CH1

#define TRAINER_OUT_GPIO                GPIO_PIN(GPIOD, 13) // PD.13
#define TRAINER_OUT_TIMER_Channel       LL_TIM_CHANNEL_CH2

fixed

#define TRAINER_IN_GPIO                 GPIO_PIN(GPIOD, 12) // PD.12
#define TRAINER_IN_TIMER_Channel        LL_TIM_CHANNEL_CH1

#define TRAINER_OUT_GPIO                GPIO_PIN(GPIOD, 12) // PD.12
#define TRAINER_OUT_TIMER_Channel       LL_TIM_CHANNEL_CH1

Tested functions:

1. Use Phoenix Simulator √
2. As Master/Jack √
3. As Salve/Jack √

[pfeerick]

This however makes no sense... the PL18 schematic clearly shows PPM IN(PD.12) and PPM OUT (PD.13), which is the trainer in and out. So at worst they should be swapped.

• You are using the RM Pocket as the master/trainer, and the PL18 as the slave/student - correct?
• Are you using a stereo or mono cable?

[NanoNM]

This however makes no sense... the PL18 schematic clearly shows PPM IN(PD.12) and PPM OUT (PD.13), which is the trainer in and out. So at worst they should be swapped.

• You are using the RM Pocket as the master/trainer, and the PL18 as the slave/student - correct?
• Are you using a stereo or mono cable?

The video to the above questions : https://drive.google.com/file/d/1ZQR0Pr_-Pckyst7F9M-It3zP30XnRof9/view?usp=drive_link

[NanoNM]

sorry i dont have PL18 schematic. The pins I found using a multimeter and an oscilloscope.
and i tested swapped pd12 and pd13 and their timer,If the audio cable is plugged in properly the pl18 can only to be the Salve, Unless it is not properly placed.
I think it might be because the soldering sequence of the audio interface is different from that of other radio.

I'll upload a video .

https://drive.google.com/file/d/1UrN8vdMA-1iDjjzMChsjBW4T1nTTtYK0/view?usp=drive_link

The same result using stereo audio