TARANIS Q X7 ACCESS: SBUS Trainer Module Input misconfigured in hal.h?

[bug400]

I did not succeed to read SBUS input from the external module heartbeat pin. Therefore I had a closer look at the current GitHub sources:

According to radio/src/targets/taranis/hal.h the X7 ACCESS configuration parameters for the SBUS trainer input pin are:

#define INTMODULE_HEARTBEAT_GPIO GPIOA
#define INTMODULE_HEARTBEAT_GPIO_PIN GPIO_Pin_7 // PA.07
#define INTMODULE_HEARTBEAT_EXTI_PinSource GPIO_PinSource7

#define TRAINER_MODULE_SBUS_GPIO_AF GPIO_AF_USART6
#define TRAINER_MODULE_SBUS_USART USART6
#define TRAINER_MODULE_SBUS_GPIO INTMODULE_HEARTBEAT_GPIO
#define TRAINER_MODULE_SBUS_GPIO_PIN INTMODULE_HEARTBEAT_GPIO_PIN
#define TRAINER_MODULE_CPPM_GPIO_PinSource INTMODULE_HEARTBEAT_EXTI_PinSource

In radio/src/targets/taranis/trainer (function init_trainer_module_sbus) the I/O port for SBUS trainer input is mapped to an USART as follows:

GPIO_PinAFConfig(TRAINER_MODULE_SBUS_GPIO, TRAINER_MODULE_SBUS_GPIO_PinSource, TRAINER_MODULE_SBUS_GPIO_AF);

which expands to:

GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_USART6)

But according to the documentation for the STM32F407 there does not exist an alternate function mapping to an USART for pin 7 of Port A.

[bug400]

I got the SBUS input working after patching the file radio/src/targets/taranis/hal.h in opentx 2.3.9:

#elif defined(RADIO_X7ACCESS)
#define INTMODULE_HEARTBEAT
#define INTMODULE_HEARTBEAT_REUSE_INTERRUPT_ROTARY_ENCODER

• #define INTMODULE_HEARTBEAT_RCC_AHB1Periph RCC_AHB1Periph_GPIOA
• #define INTMODULE_HEARTBEAT_GPIO GPIOA
• #define INTMODULE_HEARTBEAT_GPIO_PIN GPIO_Pin_7 // PA.07
• #define INTMODULE_HEARTBEAT_EXTI_PortSource EXTI_PortSourceGPIOA

• #define INTMODULE_HEARTBEAT_RCC_AHB1Periph RCC_AHB1Periph_GPIOC
• #define INTMODULE_HEARTBEAT_GPIO GPIOC
• #define INTMODULE_HEARTBEAT_GPIO_PIN GPIO_Pin_7 // PC.07
• #define INTMODULE_HEARTBEAT_EXTI_PortSource EXTI_PortSourceGPIOC
  #define INTMODULE_HEARTBEAT_EXTI_PinSource GPIO_PinSource7
  #define INTMODULE_HEARTBEAT_EXTI_LINE EXTI_Line7
  #define INTMODULE_HEARTBEAT_EXTI_IRQn EXTI9_5_IRQn
• #define INTMODULE_HEARTBEAT_EXTI_IRQHandler EXTI9_5_IRQHandler
  #elif defined(RADIO_X7) ...

The radio will not boot if the additional last definition of INTMODULE_HEARTBEAT_EXTI_IRQHandler is not present.

[mariusvds]

I have the same problem, I would like to connect a ESP32 to the input pin of the Q X7S, but it is not working.
Apparently this is not (going to be) changed in newer versions... (Am I right?)
I also can not find a good PPM or CPPM library to test wether the input pin is working at all.

[stale]

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