diff --git a/src/x9d/pulses_driver.cpp b/src/x9d/pulses_driver.cpp
index 02fdf270e..37c57ed81 100644
--- a/src/x9d/pulses_driver.cpp
+++ b/src/x9d/pulses_driver.cpp
@@ -36,6 +36,16 @@
 
 #include "../open9x.h"
 
+// Robert@FrSky code
+#if 0
+#include "../x9d/hal.h"
+#include "../x9d/STM32F2xx_StdPeriph_Lib_V1.1.0/Libraries/CMSIS/Device/ST/STM32F2xx/Include/Stm32f2xx.h"
+#include "../x9d/STM32F2xx_StdPeriph_Lib_V1.1.0/Libraries/STM32F2xx_StdPeriph_Driver/inc/Stm32f2xx_dma.h"
+#include "../x9d/STM32F2xx_StdPeriph_Lib_V1.1.0/Libraries/STM32F2xx_StdPeriph_Driver/inc/Stm32f2xx_spi.h"
+#include "../x9d/STM32F2xx_StdPeriph_Lib_V1.1.0/Libraries/STM32F2xx_StdPeriph_Driver/inc/Misc.h"
+#include "../x9d/STM32F2xx_StdPeriph_Lib_V1.1.0/Libraries/STM32F2xx_StdPeriph_Driver/inc/Stm32f2xx_tim.h"
+#endif
+
 // TODO not here!
 void setupPulses();
 void setupPulsesPPM();
@@ -51,7 +61,11 @@ void init_pxx()
   setupPulsesPXX() ; // TODO not here!
 
   RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN ;           // Enable portA clock
+#if defined(REV3)
   configure_pins( 0x0100, PIN_PERIPHERAL | PIN_PORTA | PIN_PER_1 | PIN_OS25 | PIN_PUSHPULL ) ;
+#else
+  configure_pins( 0x0080, PIN_PERIPHERAL | PIN_PORTA | PIN_PER_1 | PIN_OS25 | PIN_PUSHPULL ) ;
+#endif
   RCC->APB2ENR |= RCC_APB2ENR_TIM1EN ;            // Enable clock
   RCC->AHB1ENR |= RCC_AHB1ENR_DMA2EN ;                    // Enable DMA1 clock
 
@@ -59,7 +73,11 @@ void init_pxx()
   TIM1->ARR = 18000 ;                     // 9mS
   TIM1->CCR2 = 15000 ;            // Update time
   TIM1->PSC = (PERI2_FREQUENCY * TIMER_MULT_APB2) / 2000000 - 1 ;               // 0.5uS from 30MHz
+#if defined(REV3)
   TIM1->CCER = TIM_CCER_CC1E | TIM_CCER_CC1P ;
+#else
+  TIM1->CCER = TIM_CCER_CC1NE ;
+#endif
   TIM1->CR2 = TIM_CR2_OIS1 ;                      // O/P idle high
   TIM1->BDTR = TIM_BDTR_MOE ;             // Enable outputs
   TIM1->CCR1 = pxxStream[0] ;
@@ -97,6 +115,105 @@ void disable_pxx()
   TIM1->CR1 &= ~TIM_CR1_CEN ;
 }
 
+// Robert@FrSky code
+#if 0
+static DMA_InitTypeDef DMA_InitStructure;
+
+/**
+* Configure PA7 AS SPI1_MOSI, transfer by DMA2 ch3/stream3
+*/
+void init_pxx()
+{
+  setupPulsesPXX(); // TODO later ... not here!
+
+  // SPI1
+  SPI_InitTypeDef SPI_InitStructure;
+  NVIC_InitTypeDef NVIC_InitStructure;
+  GPIO_InitTypeDef GPIO_InitStructure;
+
+  NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream3_IRQn;
+  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
+  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
+  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+  NVIC_Init(&NVIC_InitStructure);
+
+  RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN ;
+  GPIO_InitStructure.GPIO_Pin = PIN_CPPM_OUT;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
+  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+  GPIO_InitStructure.GPIO_PuPd =  GPIO_PuPd_NOPULL;
+  GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+  GPIO_PinAFConfig(GPIOA, 7, GPIO_AF_SPI1);
+
+  RCC->APB2ENR |= RCC_APB2ENR_SPI1EN; // Enable clock
+
+  SPI_DeInit(SPI1);
+  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
+  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
+  SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
+  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
+  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
+  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
+  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64; // 1us resolution
+  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
+  SPI_InitStructure.SPI_CRCPolynomial = 7;
+
+  SPI_Init(SPI1, &SPI_InitStructure);
+  SPI_CalculateCRC(SPI1, DISABLE);
+
+  RCC->AHB1ENR |= RCC_AHB1ENR_DMA2EN ;
+  DMA_DeInit(DMA_Stream_SPI1_TX);
+
+  DMA_InitStructure.DMA_Channel = DMA_Channel_SPI1_TX;
+  DMA_InitStructure.DMA_PeripheralBaseAddr = (DWORD)(&(SPI1->DR));
+  DMA_InitStructure.DMA_Memory0BaseAddr = (DWORD)pxxStream;
+  DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
+  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
+  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
+  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
+  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
+  DMA_InitStructure.DMA_BufferSize = sizeof(pxxStream)/2;
+  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
+  DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
+  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
+  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
+  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
+  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
+
+  DMA_Init(DMA_Stream_SPI1_TX, &DMA_InitStructure);
+  DMA_ITConfig(DMA_Stream_SPI1_TX, DMA_IT_TC, ENABLE);
+  DMA_Cmd(DMA_Stream_SPI1_TX, ENABLE);
+
+  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
+  SPI_Cmd(SPI1, ENABLE);
+}
+
+void disable_pxx()
+{
+  NVIC_DisableIRQ(DMA2_Stream3_IRQn);
+  DMA_ITConfig(DMA_Stream_SPI1_TX, DMA_IT_TC, DISABLE);
+  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, DISABLE);
+}
+
+extern "C" void DMA2_Stream3_IRQHandler()
+{
+  if (DMA_GetFlagStatus(DMA_Stream_SPI1_TX, DMA_IT_TCIF3)) {
+    DMA_ClearFlag(DMA_Stream_SPI1_TX, DMA_IT_TCIF3);
+
+    setupPulses() ;
+    //memset(pxxStream, 0x5555, 5); //test pxx signal on PA.07
+
+    DMA_InitStructure.DMA_Memory0BaseAddr = (DWORD)pxxStream;
+    DMA_InitStructure.DMA_BufferSize = sizeof(pxxStream)/2;
+    DMA_Init(DMA_Stream_SPI1_TX, &DMA_InitStructure);
+    DMA_Cmd(DMA_Stream_SPI1_TX, ENABLE);
+
+    SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
+  }
+}
+#endif
 
 // PPM output
 // Timer 1, channel 1 on PA8 for prototype
@@ -108,12 +225,20 @@ void init_main_ppm()
   ppmStreamPtr = ppmStream ;
 
   RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN ;           // Enable portA clock
+#if defined(REV3)
   configure_pins( 0x0100, PIN_PERIPHERAL | PIN_PORTA | PIN_PER_1 | PIN_OS25 | PIN_PUSHPULL ) ;
+#else
+  configure_pins( 0x0080, PIN_PERIPHERAL | PIN_PORTA | PIN_PER_1 | PIN_OS25 | PIN_PUSHPULL ) ;
+#endif
   RCC->APB2ENR |= RCC_APB2ENR_TIM1EN ;            // Enable clock
 
   TIM1->ARR = *ppmStreamPtr++ ;
   TIM1->PSC = (PERI2_FREQUENCY * TIMER_MULT_APB2) / 2000000 - 1 ;               // 0.5uS from 30MHz
+#if defined(REV3)
   TIM1->CCER = TIM_CCER_CC1E ;
+#else
+  TIM1->CCER = TIM_CCER_CC1NE | TIM_CCER_CC1NP ;
+#endif
   TIM1->CCMR1 = TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC2PE ;                   // PWM mode 1
   TIM1->CCR1 = 600 ;              // 300 uS pulse
   TIM1->BDTR = TIM_BDTR_MOE ;
@@ -157,7 +282,6 @@ extern "C" void TIM1_CC_IRQHandler()
     ppmStreamPtr = ppmStream ;
 
     TIM1->DIER |= TIM_DIER_UDE ;
-
     TIM1->SR &= ~TIM_SR_UIF ;                                       // Clear this flag
     TIM1->DIER |= TIM_DIER_UIE ;                            // Enable this interrupt
   }