diff --git a/libraries/AP_HAL_ChibiOS/hwdef/revo-mini/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/revo-mini/hwdef.dat
index 7e7019297b..9d264c01f5 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/revo-mini/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/revo-mini/hwdef.dat
@@ -14,6 +14,9 @@ APJ_BOARD_ID 70
 OSCILLATOR_HZ 8000000
 STM32_PLLM_VALUE 8
 
+define STM32_ST_USE_TIMER 5
+HRT_TIMER 6
+
 FLASH_SIZE_KB 1024
 
 # board voltage
@@ -33,22 +36,52 @@ USB_STRING_SERIAL  "100"
 I2C_ORDER I2C1
 
 # order of UARTs (and USB)
-UART_ORDER OTG1 USART1
-
-# PB10 USART3_TX USART3
+UART_ORDER OTG1 USART6 USART1 USART3
 
+# we need to add support for N channels for RCIN
 # PB14 TIM8_CH2 TIM8 RCIN PULLUP LOW DMA_CH0
 
+# analog pins
 PC3 VDD_5V_SENS ADC1
-
 PC2 BATT_VOLTAGE_SENS ADC1 SCALE(1)
 PC1 BATT_CURRENT_SENS ADC1 SCALE(1)
+PC5 USB_SENSE ADC1 
+
+PC0 SBUS_INVERT OUTPUT LOW
+
+# LEDs
+PB5 LED_BLUE OUTPUT LOW GPIO(0)
+PB6 LED_YELLOW OUTPUT LOW GPIO(1) # optional
+PB4 LED_RED OUTPUT LOW GPIO(2)
+
+# GPS port
+PC6 USART6_TX USART6
+PC7 USART6_RX USART6
+
+# this is a very strange workaround for a USB problem. Needs investigating
+define GCS_SETUP_UART_FIRST 2
+
+# flexi port, telem2 (can also be I2C2)
+PB10 USART3_TX USART3
+PB11 USART3_RX USART3
+
+# alternative config
+# PB10 I2C2_SCL I2C2
+# PB11 I2C2_SDA I2C2
 
 # spi bus for IMU
 PA5 SPI1_SCK SPI1
 PA6 SPI1_MISO SPI1
 PA7 SPI1_MOSI SPI1
 
+# spi bus for dataflash
+PC10 SPI3_SCK SPI3
+PC11 SPI3_MISO SPI3
+PC12 SPI3_MOSI SPI3
+
+# IRQ for MPU6000
+PC4 EXTI_MPU6000 INPUT
+
 PA9 USART1_TX USART1
 PA10 USART1_RX USART1
 
@@ -58,15 +91,25 @@ PA12 OTG_FS_DP OTG1
 PA13 JTMS-SWDIO SWD
 PA14 JTCK-SWCLK SWD
 
+# only one I2C bus in normal config
 PB8 I2C1_SCL I2C1
 PB9 I2C1_SDA I2C1
 
+# SPI chip selects
 PA4 MPU_CS CS
+PB3 FLASH_CS CS
 
-PC6 TIM8_CH1 TIM8 PWM(1)
-PC7 TIM8_CH2 TIM8 PWM(2)
-PC8 TIM8_CH3 TIM8 PWM(3)
-PC9 TIM8_CH4 TIM8 PWM(4)
+# PWM out pins
+PB0 TIM3_CH3 TIM3 PWM(1)
+PB1 TIM3_CH4 TIM3 PWM(2)
+PA3 TIM2_CH4 TIM2 PWM(3)
+PA2 TIM2_CH3 TIM2 PWM(4)
+PA1 TIM2_CH2 TIM2 PWM(5)
+PA0 TIM2_CH1 TIM2 PWM(6)
+PC8 TIM8_CH3 TIM2 PWM(7)
+PC9 TIM8_CH4 TIM2 PWM(8)
+
+PB7 DRDY_HMC5883 INPUT PULLUP
 
 define HAL_STORAGE_SIZE 8192
 define STORAGE_FLASH_PAGE 1
@@ -79,14 +122,14 @@ FLASH_RESERVE_START_KB 64
 define HAL_INS_DEFAULT HAL_INS_MPU60XX_SPI
 
 define HAL_COMPASS_DEFAULT HAL_COMPASS_HMC5843
-define HAL_COMPASS_HMC5843_I2C_BUS 1
+define HAL_COMPASS_HMC5843_I2C_BUS 0
 define HAL_COMPASS_HMC5843_I2C_ADDR 0x1E
+define HAL_COMPASS_HMC5843_ROTATION ROTATION_YAW_270
 
 define HAL_BARO_DEFAULT HAL_BARO_MS5611_I2C
 define HAL_BARO_MS5611_I2C_BUS 0
 define HAL_BARO_MS5611_I2C_ADDR 0x77
 
 # SPI devices
-SPIDEV mpu6000 SPI1 DEVID1  MPU_CS MODE3 1*MHZ 8*MHZ 
-
-define OPTFLOW DISABLED
+SPIDEV mpu6000   SPI1 DEVID1 MPU_CS   MODE3 1*MHZ 8*MHZ 
+SPIDEV dataflash SPI3 DEVID1 FLASH_CS MODE3 1*MHZ 8*MHZ