Allow R9M 2019 in ACCESS mode on some radios (#7963)

Support for external R9M ACCESS

radio/src/targets/horus/CMakeLists.txt

@@ -5,6 +5,7 @@ option(PXX2 "PXX2 protocol support" OFF)
 option(AFHDS3 "AFHDS3 TX Module" ON)
 option(MULTIMODULE "DIY Multiprotocol TX Module (https://github.com/pascallanger/DIY-Multiprotocol-TX-Module)" ON)
 option(GHOST "Ghost TX Module" ON)
+option(HARDWARE_EXTERNAL_ACCESS_MOD "Support for R9M 2019 hardware mod" OFF)
 
 set(PWR_BUTTON "PRESS" CACHE STRING "Pwr button type (PRESS/SWITCH)")
 set(CPU_TYPE STM32F4)
@@ -139,6 +140,12 @@ if(NOT UNEXPECTED_SHUTDOWN)
   add_definitions(-DNO_UNEXPECTED_SHUTDOWN)
 endif()
 
+if(HARDWARE_EXTERNAL_ACCESS_MOD)
+  set(PXX2 ON)
+  set(AUX_SERIAL OFF)
+  add_definitions(-DHARDWARE_EXTERNAL_ACCESS_MOD)
+endif()
+
 if(INTERNAL_MODULE_PXX1)
   add_definitions(-DHARDWARE_INTERNAL_MODULE)
   add_definitions(-DINTERNAL_MODULE_PXX1)

radio/src/targets/horus/board.h

@@ -635,8 +635,8 @@ void sportUpdatePowerInit();
 #endif
 
 // Aux serial port driver
-#if defined(AUX_SERIAL_GPIO)
 #define DEBUG_BAUDRATE                  115200
+#if defined(AUX_SERIAL_GPIO)
 extern uint8_t auxSerialMode;
 void auxSerialInit(unsigned int mode, unsigned int protocol);
 void auxSerialPutc(char c);

radio/src/targets/horus/hal.h

@@ -402,7 +402,7 @@
 #endif
 
 // Serial Port (DEBUG)
-#if defined(PCBX12S) || defined(RADIO_TX16S)
+#if (defined(PCBX12S) || defined(RADIO_TX16S)) && !defined(HARDWARE_EXTERNAL_ACCESS_MOD)
   #define AUX_SERIAL_RCC_AHB1Periph           (RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_DMA1)
   #define AUX_SERIAL_RCC_APB1Periph           RCC_APB1Periph_USART3
   #define AUX_SERIAL_RCC_APB2Periph           0
@@ -762,7 +762,7 @@
   #define INTMODULE_BOOTCMD_GPIO_PIN    GPIO_Pin_9  // PI.09
 #endif
 #define INIT_INTMODULE_BOOTCMD_PIN() GPIO_ResetBits(INTMODULE_BOOTCMD_GPIO, INTMODULE_BOOTCMD_GPIO_PIN);
-#if defined(PCBX10) || PCBREV >= 13
+#if (defined(PCBX10) || PCBREV >= 13) && !defined(HARDWARE_EXTERNAL_ACCESS_MOD) //TIM2 used by ext mod
   #define INTMODULE_RCC_APB1Periph      RCC_APB1Periph_TIM2
   #define INTMODULE_RCC_APB2Periph      RCC_APB2Periph_USART1
   #define INTMODULE_TIMER               TIM2
@@ -782,7 +782,7 @@
 #define EXTMODULE_PWR_GPIO                 GPIOB
 #define EXTMODULE_PWR_GPIO_PIN             GPIO_Pin_3  // PB.03
 #define EXTERNAL_MODULE_PWR_OFF()          GPIO_ResetBits(EXTMODULE_PWR_GPIO, EXTMODULE_PWR_GPIO_PIN)
-#if defined(PCBX10) && defined(PCBREV_EXPRESS)
+#if (defined(PCBX10) && defined(PCBREV_EXPRESS)) || defined(HARDWARE_EXTERNAL_ACCESS_MOD)
   #define EXTMODULE_RCC_AHB1Periph         (RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_DMA1)
   #define EXTMODULE_RCC_APB1Periph         (RCC_APB1Periph_TIM2 | RCC_APB1Periph_USART3)
   #define EXTMODULE_RCC_APB2Periph         0
@@ -861,7 +861,7 @@
 #define INTMODULE_HEARTBEAT_EXTI_LINE           EXTI_Line12
 #define INTMODULE_HEARTBEAT_EXTI_IRQn           EXTI15_10_IRQn
 #define INTMODULE_HEARTBEAT_REUSE_INTERRUPT_ROTARY_ENCODER
-#if defined(PXX2)
+#if defined(INTERNAL_MODULE_PXX2)
   #define INTMODULE_HEARTBEAT_TRIGGER           EXTI_Trigger_Falling
 #else
   #define INTMODULE_HEARTBEAT_TRIGGER           EXTI_Trigger_Rising