diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeRedSecondary/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeRedSecondary/hwdef-bl.dat
new file mode 100644
index 0000000000..42923aee28
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeRedSecondary/hwdef-bl.dat
@@ -0,0 +1,49 @@
+# hw definition file for processing by chibios_hwdef.py
+# for H757
+
+# MCU class and specific type
+MCU STM32H7xx STM32H757xx
+
+define CORE_CM7
+define SMPS_PWR
+
+# crystal frequency
+OSCILLATOR_HZ 24000000
+
+# board ID for firmware load
+APJ_BOARD_ID 1070
+
+FLASH_SIZE_KB 2048
+
+# bootloader is installed at zero offset
+FLASH_RESERVE_START_KB 0
+
+# the location where the bootloader will put the firmware
+# the H743 has 128k sectors
+FLASH_BOOTLOADER_LOAD_KB 128
+
+define HAL_LED_ON 0
+
+PD10 LED_BOOTLOADER OUTPUT
+
+PA13 JTMS-SWDIO SWD
+PA14 JTCK-SWCLK SWD
+
+PE7 UART7_RX UART7
+PE8 UART7_TX UART7
+
+define STM32_SERIAL_USE_UART8 TRUE
+define HAL_USE_SERIAL TRUE
+
+PE1 UART8_TX UART8
+PE0 UART8_RX UART8
+
+# order of UARTs (and USB)
+SERIAL_ORDER UART7
+define BOOTLOADER_DEBUG SD8
+define BOOTLOADER_BAUDRATE 2000000
+
+# we need to stay in bootloader longer than primary
+# because we need to have primary mcu up before we can
+# flash secondary
+define HAL_BOOTLOADER_TIMEOUT 10000
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeRedSecondary/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/CubeRedSecondary/hwdef.dat
new file mode 100644
index 0000000000..49ecf6ca91
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeRedSecondary/hwdef.dat
@@ -0,0 +1,159 @@
+# hw definition file for processing by chibios_hwdef.py
+# for H757
+
+# MCU class and specific type
+MCU STM32H7xx STM32H757xx
+
+define CORE_CM7
+define SMPS_PWR
+
+# crystal frequency
+OSCILLATOR_HZ 24000000
+
+# board ID for firmware load
+APJ_BOARD_ID 1070
+
+FLASH_SIZE_KB 2048
+
+# bootloader is installed at zero offset
+FLASH_RESERVE_START_KB 128
+
+# the location where the bootloader will put the firmware
+# the H743 has 128k sectors
+FLASH_BOOTLOADER_LOAD_KB 128
+
+define HAL_LED_ON 0
+
+# supports upto 8MBits/s
+CANFD_SUPPORTED 8
+
+
+# use last 2 pages for flash storage
+# H757 has 16 pages of 128k each
+STORAGE_FLASH_PAGE 14
+define HAL_STORAGE_SIZE 32768
+
+# ADC setup
+PF11 FMU_SERVORAIL_VCC_SENS ADC1
+PA6 RSSI_IN  ADC1 SCALE(2)
+
+# CAN config
+PB14 GPIOCAN2_TERM OUTPUT HIGH
+
+
+PA12 CAN1_TX CAN1
+PB8 CAN1_RX CAN1
+
+PB6 CAN2_TX CAN2
+PB5 CAN2_RX CAN2
+
+# SPI2
+PB12 ICM_CS CS
+PC1 SPI2_MOSI SPI2
+PC2 SPI2_MISO SPI2
+PB13 SPI2_SCK SPI2
+
+# SPI4
+PE4 BARO_CS CS
+PE6 SPI4_MOSI SPI4
+PE5 SPI4_MISO SPI4
+PE2 SPI4_SCK SPI4
+
+# Sensors
+SPIDEV icm42688       SPI2 DEVID1  ICM_CS      MODE3  2*MHZ  8*MHZ
+SPIDEV ms5611         SPI4 DEVID2  BARO_CS     MODE3 20*MHZ 20*MHZ
+
+BARO MS56XX SPI:ms5611
+IMU Invensensev3 SPI:icm42688 ROTATION_PITCH_180_YAW_270
+
+CHECK_ICM42688      spi_check_register("icm42688", INV3REG_WHOAMI, INV3_WHOAMI_ICM42688)
+CHECK_MS5611        check_ms5611("ms5611")
+
+CHECK_IMU0_PRESENT      $CHECK_ICM42688
+CHECK_BARO0_PRESENT     $CHECK_MS5611
+
+BOARD_VALIDATE $CHECK_IMU0_PRESENT $CHECK_BARO0_PRESENT
+
+define HAL_CHIBIOS_ARCH_FMUV3 1
+
+define BOARD_TYPE_DEFAULT 3
+
+# RCIN
+PC8  TIM8_CH3 TIM8 RCININT  PULLDOWN
+
+# SWD
+PA13    JTMS-SWDIO    SWD
+PA14    JTCK-SWCLK    SWD
+
+# GPIO
+PD10 FMU_LED_AMBER OUTPUT HIGH OPENDRAIN GPIO(0)
+PE15 VDD_BRICK_nVALID INPUT PULLUP
+PG0 VDD_BRICK2_nVALID INPUT PULLUP
+PG5 VDD_SERVO_FAULT INPUT PULLUP
+PG1 PWM_VOLT_SEL OUTPUT HIGH GPIO(3)
+
+# Control of Spektrum power pin
+PB2 SPEKTRUM_PWR OUTPUT HIGH GPIO(73)
+define HAL_GPIO_SPEKTRUM_PWR 73
+
+# Spektrum Power is Active High
+define HAL_SPEKTRUM_PWR_ENABLED 1
+
+
+# Timer
+PA8 TIM1_CH1 TIM1 PWM(1) GPIO(50) BIDIR
+PA9 TIM1_CH2 TIM1 PWM(2) GPIO(51)
+PA10 TIM1_CH3 TIM1 PWM(3) GPIO(52) BIDIR
+PA11 TIM1_CH4 TIM1 PWM(4) GPIO(53)
+PA5 TIM2_CH1 TIM2 PWM(5) GPIO(54) BIDIR
+PA1 TIM2_CH2 TIM2 PWM(6) GPIO(55)
+PB10 TIM2_CH3 TIM2 PWM(7) GPIO(56) BIDIR
+PB11 TIM2_CH4 TIM2 PWM(8) GPIO(57)
+
+# Correctly set Direction of PWMs
+# if UNIDIR is set then BIDIR must be reset
+PB0 BIDIR_ENABLED OUTPUT LOW GPIO(4)
+PA7 HP_UNIDIR_ENABLED OUTPUT HIGH GPIO(5)
+
+
+# UART connected to FMU, uses DMA
+PE7    UART7_RX    UART7 SPEED_HIGH
+PE8    UART7_TX    UART7 SPEED_HIGH
+
+# UART for SBUS out
+PC7 USART6_RX USART6 SPEED_HIGH LOW
+PC6 USART6_TX USART6
+
+# UART for DSM input
+# TX side is for IO debug, and is unused
+PC10  USART3_TX USART3 SPEED_HIGH
+PC11 USART3_RX USART3 SPEED_HIGH
+
+# UART for debug
+PE1 UART8_TX UART8
+PE0 UART8_RX UART8
+
+# UART for RCIN
+PD1 UART4_TX UART4
+
+# USART for future use
+PD5 USART2_TX USART2 SPEED_HIGH
+PD6 USART2_RX USART2 SPEED_HIGH
+PD4 USART2_RTS USART2 SPEED_HIGH
+PD3 USART2_CTS USART2 SPEED_HIGH
+
+# order of UARTs
+SERIAL_ORDER UART7 UART8 USART3 USART6 UART4 USART2 
+
+# use 2 MBaud when talking to primary controller
+define HAL_SERIAL0_BAUD_DEFAULT 2000000
+define HAL_SERIAL2_PROTOCOL SerialProtocol_RCIN
+define HAL_SERIAL3_PROTOCOL SerialProtocol_Sbus1
+define HAL_SERIAL4_PROTOCOL SerialProtocol_RCIN
+
+
+# only use pulse input for PPM, other protocols
+# are on serial
+define HAL_RCIN_PULSE_PPM_ONLY
+
+define MAV_SYSTEM_ID 3