diff --git a/flight/pios/stm32f4xx/startup_stm32f401xx.s b/flight/pios/stm32f4xx/startup_stm32f401xx.s
deleted file mode 100644
index 5ff5fd3cd..000000000
--- a/flight/pios/stm32f4xx/startup_stm32f401xx.s
+++ /dev/null
@@ -1,384 +0,0 @@
-;******************** (C) COPYRIGHT 2013 STMicroelectronics ********************
-;* File Name : startup_stm32f401xx.s
-;* Author : MCD Application Team
-;* Version : V1.3.0
-;* Date : 08-November-2013
-;* Description : STM32F401xx devices vector table for MDK-ARM toolchain.
-;* This module performs:
-;* - Set the initial SP
-;* - Set the initial PC == Reset_Handler
-;* - Set the vector table entries with the exceptions ISR address
-;* - Configure the system clock
-;* - Branches to __main in the C library (which eventually
-;* calls main()).
-;* After Reset the CortexM4 processor is in Thread mode,
-;* priority is Privileged, and the Stack is set to Main.
-;* <<< Use Configuration Wizard in Context Menu >>>
-;*******************************************************************************
-;
-; Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
-; You may not use this file except in compliance with the License.
-; You may obtain a copy of the License at:
-;
-; http://www.st.com/software_license_agreement_liberty_v2
-;
-; Unless required by applicable law or agreed to in writing, software
-; distributed under the License is distributed on an "AS IS" BASIS,
-; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-; See the License for the specific language governing permissions and
-; limitations under the License.
-;
-;*******************************************************************************
-
-; Amount of memory (in bytes) allocated for Stack
-; Tailor this value to your application needs
-; Stack Configuration
-; Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
-;
-
-Stack_Size EQU 0x00000400
-
- AREA STACK, NOINIT, READWRITE, ALIGN=3
-Stack_Mem SPACE Stack_Size
-__initial_sp
-
-
-; Heap Configuration
-; Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
-;
-
-Heap_Size EQU 0x00000200
-
- AREA HEAP, NOINIT, READWRITE, ALIGN=3
-__heap_base
-Heap_Mem SPACE Heap_Size
-__heap_limit
-
- PRESERVE8
- THUMB
-
-
-; Vector Table Mapped to Address 0 at Reset
- AREA RESET, DATA, READONLY
- EXPORT __Vectors
- EXPORT __Vectors_End
- EXPORT __Vectors_Size
-
-__Vectors DCD __initial_sp ; Top of Stack
- DCD Reset_Handler ; Reset Handler
- DCD NMI_Handler ; NMI Handler
- DCD HardFault_Handler ; Hard Fault Handler
- DCD MemManage_Handler ; MPU Fault Handler
- DCD BusFault_Handler ; Bus Fault Handler
- DCD UsageFault_Handler ; Usage Fault Handler
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD SVC_Handler ; SVCall Handler
- DCD DebugMon_Handler ; Debug Monitor Handler
- DCD 0 ; Reserved
- DCD PendSV_Handler ; PendSV Handler
- DCD SysTick_Handler ; SysTick Handler
-
- ; External Interrupts
- DCD WWDG_IRQHandler ; Window WatchDog
- DCD PVD_IRQHandler ; PVD through EXTI Line detection
- DCD TAMP_STAMP_IRQHandler ; Tamper and TimeStamps through the EXTI line
- DCD RTC_WKUP_IRQHandler ; RTC Wakeup through the EXTI line
- DCD FLASH_IRQHandler ; FLASH
- DCD RCC_IRQHandler ; RCC
- DCD EXTI0_IRQHandler ; EXTI Line0
- DCD EXTI1_IRQHandler ; EXTI Line1
- DCD EXTI2_IRQHandler ; EXTI Line2
- DCD EXTI3_IRQHandler ; EXTI Line3
- DCD EXTI4_IRQHandler ; EXTI Line4
- DCD DMA1_Stream0_IRQHandler ; DMA1 Stream 0
- DCD DMA1_Stream1_IRQHandler ; DMA1 Stream 1
- DCD DMA1_Stream2_IRQHandler ; DMA1 Stream 2
- DCD DMA1_Stream3_IRQHandler ; DMA1 Stream 3
- DCD DMA1_Stream4_IRQHandler ; DMA1 Stream 4
- DCD DMA1_Stream5_IRQHandler ; DMA1 Stream 5
- DCD DMA1_Stream6_IRQHandler ; DMA1 Stream 6
- DCD ADC_IRQHandler ; ADC1
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD EXTI9_5_IRQHandler ; External Line[9:5]s
- DCD TIM1_BRK_TIM9_IRQHandler ; TIM1 Break and TIM9
- DCD TIM1_UP_TIM10_IRQHandler ; TIM1 Update and TIM10
- DCD TIM1_TRG_COM_TIM11_IRQHandler ; TIM1 Trigger and Commutation and TIM11
- DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare
- DCD TIM2_IRQHandler ; TIM2
- DCD TIM3_IRQHandler ; TIM3
- DCD TIM4_IRQHandler ; TIM4
- DCD I2C1_EV_IRQHandler ; I2C1 Event
- DCD I2C1_ER_IRQHandler ; I2C1 Error
- DCD I2C2_EV_IRQHandler ; I2C2 Event
- DCD I2C2_ER_IRQHandler ; I2C2 Error
- DCD SPI1_IRQHandler ; SPI1
- DCD SPI2_IRQHandler ; SPI2
- DCD USART1_IRQHandler ; USART1
- DCD USART2_IRQHandler ; USART2
- DCD 0 ; Reserved
- DCD EXTI15_10_IRQHandler ; External Line[15:10]s
- DCD RTC_Alarm_IRQHandler ; RTC Alarm (A and B) through EXTI Line
- DCD OTG_FS_WKUP_IRQHandler ; USB OTG FS Wakeup through EXTI line
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD DMA1_Stream7_IRQHandler ; DMA1 Stream7
- DCD 0 ; Reserved
- DCD SDIO_IRQHandler ; SDIO
- DCD TIM5_IRQHandler ; TIM5
- DCD SPI3_IRQHandler ; SPI3
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD DMA2_Stream0_IRQHandler ; DMA2 Stream 0
- DCD DMA2_Stream1_IRQHandler ; DMA2 Stream 1
- DCD DMA2_Stream2_IRQHandler ; DMA2 Stream 2
- DCD DMA2_Stream3_IRQHandler ; DMA2 Stream 3
- DCD DMA2_Stream4_IRQHandler ; DMA2 Stream 4
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD OTG_FS_IRQHandler ; USB OTG FS
- DCD DMA2_Stream5_IRQHandler ; DMA2 Stream 5
- DCD DMA2_Stream6_IRQHandler ; DMA2 Stream 6
- DCD DMA2_Stream7_IRQHandler ; DMA2 Stream 7
- DCD USART6_IRQHandler ; USART6
- DCD I2C3_EV_IRQHandler ; I2C3 event
- DCD I2C3_ER_IRQHandler ; I2C3 error
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD FPU_IRQHandler ; FPU
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD SPI4_IRQHandler ; SPI4
-
-__Vectors_End
-
-__Vectors_Size EQU __Vectors_End - __Vectors
-
- AREA |.text|, CODE, READONLY
-
-; Reset handler
-Reset_Handler PROC
- EXPORT Reset_Handler [WEAK]
- IMPORT SystemInit
- IMPORT __main
-
- LDR R0, =SystemInit
- BLX R0
- LDR R0, =__main
- BX R0
- ENDP
-
-; Dummy Exception Handlers (infinite loops which can be modified)
-
-NMI_Handler PROC
- EXPORT NMI_Handler [WEAK]
- B .
- ENDP
-HardFault_Handler\
- PROC
- EXPORT HardFault_Handler [WEAK]
- B .
- ENDP
-MemManage_Handler\
- PROC
- EXPORT MemManage_Handler [WEAK]
- B .
- ENDP
-BusFault_Handler\
- PROC
- EXPORT BusFault_Handler [WEAK]
- B .
- ENDP
-UsageFault_Handler\
- PROC
- EXPORT UsageFault_Handler [WEAK]
- B .
- ENDP
-SVC_Handler PROC
- EXPORT SVC_Handler [WEAK]
- B .
- ENDP
-DebugMon_Handler\
- PROC
- EXPORT DebugMon_Handler [WEAK]
- B .
- ENDP
-PendSV_Handler PROC
- EXPORT PendSV_Handler [WEAK]
- B .
- ENDP
-SysTick_Handler PROC
- EXPORT SysTick_Handler [WEAK]
- B .
- ENDP
-
-Default_Handler PROC
-
- EXPORT WWDG_IRQHandler [WEAK]
- EXPORT PVD_IRQHandler [WEAK]
- EXPORT TAMP_STAMP_IRQHandler [WEAK]
- EXPORT RTC_WKUP_IRQHandler [WEAK]
- EXPORT FLASH_IRQHandler [WEAK]
- EXPORT RCC_IRQHandler [WEAK]
- EXPORT EXTI0_IRQHandler [WEAK]
- EXPORT EXTI1_IRQHandler [WEAK]
- EXPORT EXTI2_IRQHandler [WEAK]
- EXPORT EXTI3_IRQHandler [WEAK]
- EXPORT EXTI4_IRQHandler [WEAK]
- EXPORT DMA1_Stream0_IRQHandler [WEAK]
- EXPORT DMA1_Stream1_IRQHandler [WEAK]
- EXPORT DMA1_Stream2_IRQHandler [WEAK]
- EXPORT DMA1_Stream3_IRQHandler [WEAK]
- EXPORT DMA1_Stream4_IRQHandler [WEAK]
- EXPORT DMA1_Stream5_IRQHandler [WEAK]
- EXPORT DMA1_Stream6_IRQHandler [WEAK]
- EXPORT ADC_IRQHandler [WEAK]
- EXPORT EXTI9_5_IRQHandler [WEAK]
- EXPORT TIM1_BRK_TIM9_IRQHandler [WEAK]
- EXPORT TIM1_UP_TIM10_IRQHandler [WEAK]
- EXPORT TIM1_TRG_COM_TIM11_IRQHandler [WEAK]
- EXPORT TIM1_CC_IRQHandler [WEAK]
- EXPORT TIM2_IRQHandler [WEAK]
- EXPORT TIM3_IRQHandler [WEAK]
- EXPORT TIM4_IRQHandler [WEAK]
- EXPORT I2C1_EV_IRQHandler [WEAK]
- EXPORT I2C1_ER_IRQHandler [WEAK]
- EXPORT I2C2_EV_IRQHandler [WEAK]
- EXPORT I2C2_ER_IRQHandler [WEAK]
- EXPORT SPI1_IRQHandler [WEAK]
- EXPORT SPI2_IRQHandler [WEAK]
- EXPORT USART1_IRQHandler [WEAK]
- EXPORT USART2_IRQHandler [WEAK]
- EXPORT EXTI15_10_IRQHandler [WEAK]
- EXPORT RTC_Alarm_IRQHandler [WEAK]
- EXPORT OTG_FS_WKUP_IRQHandler [WEAK]
- EXPORT DMA1_Stream7_IRQHandler [WEAK]
- EXPORT SDIO_IRQHandler [WEAK]
- EXPORT TIM5_IRQHandler [WEAK]
- EXPORT SPI3_IRQHandler [WEAK]
- EXPORT DMA2_Stream0_IRQHandler [WEAK]
- EXPORT DMA2_Stream1_IRQHandler [WEAK]
- EXPORT DMA2_Stream2_IRQHandler [WEAK]
- EXPORT DMA2_Stream3_IRQHandler [WEAK]
- EXPORT DMA2_Stream4_IRQHandler [WEAK]
- EXPORT OTG_FS_IRQHandler [WEAK]
- EXPORT DMA2_Stream5_IRQHandler [WEAK]
- EXPORT DMA2_Stream6_IRQHandler [WEAK]
- EXPORT DMA2_Stream7_IRQHandler [WEAK]
- EXPORT USART6_IRQHandler [WEAK]
- EXPORT I2C3_EV_IRQHandler [WEAK]
- EXPORT I2C3_ER_IRQHandler [WEAK]
- EXPORT FPU_IRQHandler [WEAK]
- EXPORT SPI4_IRQHandler [WEAK]
-
-WWDG_IRQHandler
-PVD_IRQHandler
-TAMP_STAMP_IRQHandler
-RTC_WKUP_IRQHandler
-FLASH_IRQHandler
-RCC_IRQHandler
-EXTI0_IRQHandler
-EXTI1_IRQHandler
-EXTI2_IRQHandler
-EXTI3_IRQHandler
-EXTI4_IRQHandler
-DMA1_Stream0_IRQHandler
-DMA1_Stream1_IRQHandler
-DMA1_Stream2_IRQHandler
-DMA1_Stream3_IRQHandler
-DMA1_Stream4_IRQHandler
-DMA1_Stream5_IRQHandler
-DMA1_Stream6_IRQHandler
-ADC_IRQHandler
-EXTI9_5_IRQHandler
-TIM1_BRK_TIM9_IRQHandler
-TIM1_UP_TIM10_IRQHandler
-TIM1_TRG_COM_TIM11_IRQHandler
-TIM1_CC_IRQHandler
-TIM2_IRQHandler
-TIM3_IRQHandler
-TIM4_IRQHandler
-I2C1_EV_IRQHandler
-I2C1_ER_IRQHandler
-I2C2_EV_IRQHandler
-I2C2_ER_IRQHandler
-SPI1_IRQHandler
-SPI2_IRQHandler
-USART1_IRQHandler
-USART2_IRQHandler
-EXTI15_10_IRQHandler
-RTC_Alarm_IRQHandler
-OTG_FS_WKUP_IRQHandler
-DMA1_Stream7_IRQHandler
-SDIO_IRQHandler
-TIM5_IRQHandler
-SPI3_IRQHandler
-DMA2_Stream0_IRQHandler
-DMA2_Stream1_IRQHandler
-DMA2_Stream2_IRQHandler
-DMA2_Stream3_IRQHandler
-DMA2_Stream4_IRQHandler
-ETH_IRQHandler
-OTG_FS_IRQHandler
-DMA2_Stream5_IRQHandler
-DMA2_Stream6_IRQHandler
-DMA2_Stream7_IRQHandler
-USART6_IRQHandler
-I2C3_EV_IRQHandler
-I2C3_ER_IRQHandler
-FPU_IRQHandler
-SPI4_IRQHandler
-
- B .
-
- ENDP
-
- ALIGN
-
-;*******************************************************************************
-; User Stack and Heap initialization
-;*******************************************************************************
- IF :DEF:__MICROLIB
-
- EXPORT __initial_sp
- EXPORT __heap_base
- EXPORT __heap_limit
-
- ELSE
-
- IMPORT __use_two_region_memory
- EXPORT __user_initial_stackheap
-
-__user_initial_stackheap
-
- LDR R0, = Heap_Mem
- LDR R1, =(Stack_Mem + Stack_Size)
- LDR R2, = (Heap_Mem + Heap_Size)
- LDR R3, = Stack_Mem
- BX LR
-
- ALIGN
-
- ENDIF
-
- END
-
-;************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE*****