o Adding a generic binutils part for creating the info files (.nm, disassembly, size, hex and bin files.)

o Adding initial support for STM32F103xx chips. Can easily be expanded to all at least the F1 series.

7 files changed, 743 insertions, 0 deletions

diff --git a/stm32f103/include/mcu/init.h b/stm32f103/include/mcu/init.h
new file mode 100644
index 0000000..6c870c2
--- /dev/null
+++ b/stm32f103/include/mcu/init.h
@@ -0,0 +1,136 @@
+#ifndef INIT_HIGH_H
+#define INIT_HIGH_H
+
+extern "C"
+int halt();
+
+extern "C"
+int main();
+
+extern "C" {
+
+// Symbols for interrupt handlers. They all have a default implementation, but can be overridden by creating a function
+// with the same name.
+
+extern void _Reset_Handler();
+
+extern void NMI_Handler();
+
+extern void HardFault_Handler();
+
+extern void MemManage_Handler();
+
+extern void BusFault_Handler();
+
+extern void UsageFault_Handler();
+
+extern void SVC_Handler();
+
+extern void DebugMon_Handler();
+
+extern void PendSV_Handler();
+
+extern void SysTick_Handler();
+
+extern void WWDG_IRQHandler();
+
+extern void PVD_IRQHandler();
+
+extern void TAMPER_IRQHandler();
+
+extern void RTC_IRQHandler();
+
+extern void FLASH_IRQHandler();
+
+extern void RCC_IRQHandler();
+
+extern void EXTI0_IRQHandler();
+
+extern void EXTI1_IRQHandler();
+
+extern void EXTI2_IRQHandler();
+
+extern void EXTI3_IRQHandler();
+
+extern void EXTI4_IRQHandler();
+
+extern void DMA1_Channel1_IRQHandler();
+
+extern void DMA1_Channel2_IRQHandler();
+
+extern void DMA1_Channel3_IRQHandler();
+
+extern void DMA1_Channel4_IRQHandler();
+
+extern void DMA1_Channel5_IRQHandler();
+
+extern void DMA1_Channel6_IRQHandler();
+
+extern void DMA1_Channel7_IRQHandler();
+
+extern void ADC1_2_IRQHandler();
+
+extern void USB_HP_CAN1_TX_IRQHandler();
+
+extern void USB_LP_CAN1_RX0_IRQHandler();
+
+extern void CAN1_RX1_IRQHandler();
+
+extern void CAN1_SCE_IRQHandler();
+
+extern void EXTI9_5_IRQHandler();
+
+extern void TIM1_BRK_IRQHandler();
+
+extern void TIM1_UP_IRQHandler();
+
+extern void TIM1_TRG_COM_IRQHandler();
+
+extern void TIM1_CC_IRQHandler();
+
+extern void TIM2_IRQHandler();
+
+extern void TIM3_IRQHandler();
+
+extern void TIM4_IRQHandler();
+
+extern void I2C1_EV_IRQHandler();
+
+extern void I2C1_ER_IRQHandler();
+
+extern void I2C2_EV_IRQHandler();
+
+extern void I2C2_ER_IRQHandler();
+
+extern void SPI1_IRQHandler();
+
+extern void SPI2_IRQHandler();
+
+extern void USART1_IRQHandler();
+
+extern void USART2_IRQHandler();
+
+extern void USART3_IRQHandler();
+
+extern void EXTI15_10_IRQHandler();
+
+extern void RTCAlarm_IRQHandler();
+
+extern void USBWakeUp_IRQHandler();
+}
+
+
+#include <limits>
+
+namespace mcu {
+
+template<typename R = std::size_t, typename T, std::size_t N>
+static inline constexpr
+R SizeOfArray(const T(&)[N]) {
+    static_assert(std::numeric_limits<R>::max() >= N, "N does not fit in R");
+    return static_cast<R>(N);
+}
+
+}; // namespace mcu
+
+#endif
diff --git a/stm32f103/index.cmake b/stm32f103/index.cmake
new file mode 100644
index 0000000..c840aa5
--- /dev/null
+++ b/stm32f103/index.cmake
@@ -0,0 +1,81 @@
+set(CMAKE_C_STANDARD "11")
+set(CMAKE_CXX_STANDARD "14")
+
+set(MCU_INIT_SOURCES "")
+list(APPEND MCU_INIT_SOURCES "${MCU_BASEDIR}/stm32f103/src/init_low.s")
+list(APPEND MCU_INIT_SOURCES "${MCU_BASEDIR}/stm32f103/src/init_high.cpp")
+list(APPEND MCU_INIT_SOURCES "${MCU_BASEDIR}/stm32f103/src/default_handler.cpp")
+list(APPEND MCU_INIT_SOURCES "${MCU_BASEDIR}/stm32f103/include/mcu/init.h")
+set(MCU_INIT_INCLUDES "")
+list(APPEND MCU_INIT_INCLUDES "${MCU_BASEDIR}/stm32f103/include")
+
+function(mcu_add_executable)
+
+    set(options)
+    set(oneValueArgs TARGET LINKER_SCRIPT)
+    set(multiValueArgs)
+    cmake_parse_arguments(ARGS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+    if (NOT ARGS_TARGET)
+        message(FATAL_ERROR "MCU: Missing required argument: TARGET")
+    endif ()
+
+    if (MCU_CHIP MATCHES "stm32f103.4" OR MCU_CHIP MATCHES "stm32f103.6")
+        set(size_define STM32F10X_SM)
+    elseif (MCU_CHIP MATCHES "stm32f103.8" OR MCU_CHIP MATCHES "stm32f103.b")
+        set(size_define STM32F10X_MD)
+    elseif (MCU_CHIP MATCHES "stm32f103.c" OR MCU_CHIP MATCHES "stm32f103.d" OR MCU_CHIP MATCHES "stm32f103.e")
+        set(size_define STM32F10X_LD)
+    else ()
+        message(FATAL_ERROR "Unknown STM32 version: ${MCU_CHIP}")
+    endif ()
+
+    target_compile_definitions(${ARGS_TARGET} PUBLIC ${size_define})
+
+    # Compile and linker options
+
+    set(o_level "$<TARGET_PROPERTY:O_LEVEL>")
+    target_compile_options(${ARGS_TARGET} PUBLIC
+            "$<$<BOOL:${o_level}>:-O${o_level}>$<$<NOT:$<BOOL:${o_level}>>:-O3>")
+    unset(o_level)
+
+    target_compile_options(${ARGS_TARGET} PUBLIC
+            -mcpu=cortex-m3
+            -mthumb
+            -g
+            )
+
+    target_link_libraries(${ARGS_TARGET} PUBLIC
+            -mcpu=cortex-m3
+            -mthumb
+            -nostdlib
+            -nostartfiles
+            -Wl,--gc-sections
+            )
+
+    # Linker script
+
+    if (ARGS_LINKER_SCRIPT)
+        if (NOT IS_ABSOLUTE "${ARGS_LINKER_SCRIPT}")
+            set(ARGS_LINKER_SCRIPT "${CMAKE_CURRENT_SOURCE_DIR}/${ARGS_LINKER_SCRIPT}")
+        endif ()
+        set_target_properties(${ARGS_TARGET} PROPERTIES MCU_LINKER_SCRIPT "${ARGS_LINKER_SCRIPT}")
+    endif ()
+
+    stm32_configure_linker_script(${ARGS_TARGET})
+
+endfunction()
+
+function(stm32_configure_linker_script T)
+    get_target_property(MCU_LINKER_SCRIPT ${T} MCU_LINKER_SCRIPT)
+
+    if (NOT MCU_LINKER_SCRIPT)
+        set(ld "${MCU_BASEDIR}/stm32f103/stm32f103.ld")
+        message("MCU: Using built-in linker script: ${ld}")
+
+        set_target_properties(${T} PROPERTIES MCU_LINKER_SCRIPT ${ld})
+    endif ()
+
+    target_link_libraries(${T} PUBLIC
+            "-T\"$<TARGET_PROPERTY:MCU_LINKER_SCRIPT>\"")
+endfunction()
diff --git a/stm32f103/src/default_handler.cpp b/stm32f103/src/default_handler.cpp
new file mode 100644
index 0000000..68a5dff
--- /dev/null
+++ b/stm32f103/src/default_handler.cpp
@@ -0,0 +1,7 @@
+#include <cstddef>
+#include <cstdint>
+#include <stm32f10x.h>
+#include <core_cm3.h>
+
+#include "mcu/init.h"
+
diff --git a/stm32f103/src/init_high.cpp b/stm32f103/src/init_high.cpp
new file mode 100644
index 0000000..ca083de
--- /dev/null
+++ b/stm32f103/src/init_high.cpp
@@ -0,0 +1,384 @@
+#include <cstdint>
+#include <cstddef>
+#include "stm32f10x.h"
+#include "mcu/init.h"
+
+// This is required to keep the compiler from replacing parts of a function with calls to library functions like memcpy.
+# define disable_replace_with_library_calls \
+    __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
+
+using namespace mcu;
+
+/**
+ * Symbols that are defined by the linker
+ */
+extern "C"
+{
+extern uint8_t _copy_data_load, _copy_data_store, _copy_data_store_end;
+extern uint8_t _bss_start, _bss_end;
+
+typedef void(*constructor_t)();
+extern constructor_t _init_array_start[], _init_array_end[];
+}
+
+extern "C"
+__attribute__((used))
+void __cxa_pure_virtual()
+{
+    halt();
+}
+
+extern "C"
+__attribute__((used))
+void __aeabi_unwind_cpp_pr0()
+{
+}
+
+extern "C"
+__attribute__((used))
+void __aeabi_unwind_cpp_pr1()
+{
+}
+
+extern "C"
+__attribute__((used))
+void __aeabi_unwind_cpp_pr2()
+{
+}
+
+extern "C"
+__attribute__((used))
+disable_replace_with_library_calls
+void *memset(void *dst, int i, size_t n)
+{
+    auto *d = static_cast<uint8_t *>(dst);
+    auto c = (uint8_t) i;
+    while (n > 0) {
+        *d = c;
+        d++;
+        n--;
+    }
+    return dst;
+}
+
+extern "C"
+__attribute__((used))
+disable_replace_with_library_calls
+void *memcpy(void *destination, void *source, size_t num)
+{
+    auto *d = (uint8_t *) destination;
+    auto *s = (uint8_t *) source;
+    for (size_t i = 0; i < num; i++) {
+        d[i] = s[i];
+    }
+    return destination;
+}
+
+extern "C"
+__attribute__((used))
+void init_high()
+{
+    // Copy data from flash to ram
+    size_t num = &_copy_data_store_end - &_copy_data_store;
+    memcpy(&_copy_data_store, &_copy_data_load, num);
+
+    // Clear the BSS segment
+    memset(&_bss_start, 0, &_bss_end - &_bss_start);
+
+    // Initialize c++ constructors
+    for (constructor_t *fn = _init_array_start; fn < _init_array_end; fn++) {
+        (*fn)();
+    }
+
+    main();
+}
+
+__attribute__((used))
+struct {
+    uint32_t CFSR;
+    uint32_t HFSR;
+    uint32_t DFSR;
+    uint32_t AFSR;
+//    uint32_t MMAR;
+    uint32_t BFAR;
+} Default_Handler_Info;
+
+#define dbg_printf
+//void dbg_printf(...);
+
+extern "C"
+__attribute__((weak, used))
+void HardFault_Handler_C()
+{
+    halt();
+}
+
+extern "C"
+__attribute__((used))
+void Default_Handler()
+{
+    Default_Handler_Info = {
+            CFSR: SCB->CFSR,
+            HFSR: SCB->HFSR,
+            DFSR: SCB->DFSR,
+            AFSR: SCB->AFSR,
+            BFAR: SCB->BFAR,
+    };
+
+    dbg_printf("Default handler:\n");
+
+    dbg_printf("HFSR: 0x%08lx\n", Default_Handler_Info.HFSR);
+    if (Default_Handler_Info.HFSR & SCB_HFSR_DEBUGEVT) {
+        dbg_printf("      HFSR.DEBUGEVT\n");
+    }
+    if (Default_Handler_Info.HFSR & SCB_HFSR_FORCED) {
+        dbg_printf("      HFSR.FORCED\n");
+    }
+    if (Default_Handler_Info.HFSR & SCB_HFSR_VECTTBL) {
+        dbg_printf("      HFSR.VECTTBL\n");
+    }
+
+    dbg_printf("CFSR: 0x%08lx\n", Default_Handler_Info.CFSR);
+    if (Default_Handler_Info.CFSR & SCB_CFSR_DIVBYZERO) {
+        dbg_printf("      UFSR.DIVBYZERO\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_UNALIGNED) {
+        dbg_printf("      UFSR.UNALIGED\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_NOCP) {
+        dbg_printf("      UFSR.NOCP\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_INVPC) {
+        dbg_printf("      UFSR.INVPC\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_INVSTATE) {
+        dbg_printf("      UFSR.INVSTATE\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_UNDEFINSTR) {
+        dbg_printf("      UFSR.UNDEFINSTR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_BFARVALID) {
+        dbg_printf("      BFSR.BFARVALID\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_STKERR) {
+        dbg_printf("      BFSR.STKERR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_UNSTKERR) {
+        dbg_printf("      BFSR.UNSTKERR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_IMPRECISERR) {
+        dbg_printf("      BFSR.IMPRECISERR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_PRECISERR) {
+        dbg_printf("      BFSR.PRECISERR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_IBUSERR) {
+        dbg_printf("      BFSR.IBUSERR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_MMARVALID) {
+        dbg_printf("      MMFSR.MMARVALID\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_MSTKERR) {
+        dbg_printf("      MMFSR.MSTKERR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_MUNSTKERR) {
+        dbg_printf("      MMFSR.MUNSTKERR\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_DACCVIOL) {
+        dbg_printf("      MMFSR.DACCVIOL\n");
+    }
+    if (Default_Handler_Info.CFSR & SCB_CFSR_IACCVIOL) {
+        dbg_printf("      MMFSR.IACCVIOL\n");
+    }
+    dbg_printf("DFSR: 0x%08lx\n", Default_Handler_Info.DFSR);
+    dbg_printf("AFSR: 0x%08lx\n", Default_Handler_Info.AFSR);
+
+    if (Default_Handler_Info.CFSR & SCB_CFSR_BFARVALID) {
+        dbg_printf("BFAR: 0x%08lx\n", Default_Handler_Info.BFAR);
+    } else {
+        dbg_printf("BFAR: <invalid>\n");
+    }
+
+    dbg_printf("NVIC:\n");
+    for (size_t i = 0; i < SizeOfArray(NVIC->IABR); i++) {
+        dbg_printf("  IABR[%d]: 0x%08lx\n", i, NVIC->IABR[i]);
+    }
+
+    halt();
+}
+
+void _Reset_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void NMI_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void HardFault_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void MemManage_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void BusFault_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void UsageFault_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void SVC_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DebugMon_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void PendSV_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void SysTick_Handler() __attribute__ ((weak, alias("Default_Handler")));
+
+void WWDG_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void PVD_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TAMPER_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void RTC_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void FLASH_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void RCC_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void EXTI0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void EXTI1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void EXTI2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void EXTI3_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void EXTI4_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DMA1_Channel1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DMA1_Channel2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DMA1_Channel3_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DMA1_Channel4_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DMA1_Channel5_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DMA1_Channel6_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void DMA1_Channel7_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void ADC1_2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void USB_HP_CAN1_TX_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void USB_LP_CAN1_RX0_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void CAN1_RX1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void CAN1_SCE_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void EXTI9_5_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TIM1_BRK_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TIM1_UP_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TIM1_TRG_COM_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TIM1_CC_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TIM2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TIM3_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void TIM4_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void I2C1_EV_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void I2C1_ER_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void I2C2_EV_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void I2C2_ER_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void SPI1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void SPI2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void USART1_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void USART2_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void USART3_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void EXTI15_10_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void RTCAlarm_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+void USBWakeUp_IRQHandler() __attribute__ ((weak, alias("Default_Handler")));
+
+__attribute__((section(".isr_vectors"), used))
+uint32_t isr_vectors[74] = {
+        (uint32_t) _Reset_Handler,
+        (uint32_t) NMI_Handler,
+        (uint32_t) HardFault_Handler,
+        (uint32_t) MemManage_Handler,
+        (uint32_t) BusFault_Handler,
+        (uint32_t) UsageFault_Handler,
+        0,
+        0,
+        0,
+        0,
+        (uint32_t) SVC_Handler,
+        (uint32_t) DebugMon_Handler,
+        0,
+        (uint32_t) PendSV_Handler,
+        (uint32_t) SysTick_Handler,
+        (uint32_t) WWDG_IRQHandler,
+        (uint32_t) PVD_IRQHandler,
+        (uint32_t) TAMPER_IRQHandler,
+        (uint32_t) RTC_IRQHandler,
+        (uint32_t) FLASH_IRQHandler,
+        (uint32_t) RCC_IRQHandler,
+        (uint32_t) EXTI0_IRQHandler,
+        (uint32_t) EXTI1_IRQHandler,
+        (uint32_t) EXTI2_IRQHandler,
+        (uint32_t) EXTI3_IRQHandler,
+        (uint32_t) EXTI4_IRQHandler,
+        (uint32_t) DMA1_Channel1_IRQHandler,
+        (uint32_t) DMA1_Channel2_IRQHandler,
+        (uint32_t) DMA1_Channel3_IRQHandler,
+        (uint32_t) DMA1_Channel4_IRQHandler,
+        (uint32_t) DMA1_Channel5_IRQHandler,
+        (uint32_t) DMA1_Channel6_IRQHandler,
+        (uint32_t) DMA1_Channel7_IRQHandler,
+        (uint32_t) ADC1_2_IRQHandler,
+        (uint32_t) USB_HP_CAN1_TX_IRQHandler,
+        (uint32_t) USB_LP_CAN1_RX0_IRQHandler,
+        (uint32_t) CAN1_RX1_IRQHandler,
+        (uint32_t) CAN1_SCE_IRQHandler,
+        (uint32_t) EXTI9_5_IRQHandler,
+        (uint32_t) TIM1_BRK_IRQHandler,
+        (uint32_t) TIM1_UP_IRQHandler,
+        (uint32_t) TIM1_TRG_COM_IRQHandler,
+        (uint32_t) TIM1_CC_IRQHandler,
+        (uint32_t) TIM2_IRQHandler,
+        (uint32_t) TIM3_IRQHandler,
+        (uint32_t) TIM4_IRQHandler,
+        (uint32_t) I2C1_EV_IRQHandler,
+        (uint32_t) I2C1_ER_IRQHandler,
+        (uint32_t) I2C2_EV_IRQHandler,
+        (uint32_t) I2C2_ER_IRQHandler,
+        (uint32_t) SPI1_IRQHandler,
+        (uint32_t) SPI2_IRQHandler,
+        (uint32_t) USART1_IRQHandler,
+        (uint32_t) USART2_IRQHandler,
+        (uint32_t) USART3_IRQHandler,
+        (uint32_t) EXTI15_10_IRQHandler,
+        (uint32_t) RTCAlarm_IRQHandler,
+        (uint32_t) USBWakeUp_IRQHandler,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0
+};
diff --git a/stm32f103/src/init_low.s b/stm32f103/src/init_low.s
new file mode 100644
index 0000000..b666ed4
--- /dev/null
+++ b/stm32f103/src/init_low.s
@@ -0,0 +1,47 @@
+.syntax unified
+.cpu cortex-m3
+.thumb
+
+.section .text
+
+.thumb_func
+.global _Reset_Handler
+_Reset_Handler:
+    bl init_high
+    b halt
+
+.thumb_func
+.global halt
+halt:
+    b .
+
+.thumb_func
+.global NMI_Handler
+NMI_Handler:
+    b halt
+
+.thumb_func
+.global HardFault_Handler
+HardFault_Handler:
+    tst lr, #4
+    ite eq
+    mrseq r0, msp
+    mrsne r0, psp
+    b HardFault_Handler_C
+
+.thumb_func
+.global MemManage_Handler
+MemManage_Handler:
+    b halt
+
+.thumb_func
+.global BusFault_Handler
+BusFault_Handler:
+    b halt
+
+.thumb_func
+.global UsageFault_Handler
+UsageFault_Handler:
+    b halt
+
+.end
diff --git a/stm32f103/stm32f103.ld b/stm32f103/stm32f103.ld
new file mode 100644
index 0000000..bafd520
--- /dev/null
+++ b/stm32f103/stm32f103.ld
@@ -0,0 +1,62 @@
+ENTRY(_Reset_Handler)
+
+MEMORY
+{
+  FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 64K
+  RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 20k
+  MEMORY_B1 (rx)  : ORIGIN = 0x60000000, LENGTH = 0K
+}
+
+_estack = ORIGIN(RAM) + LENGTH(RAM);
+
+SECTIONS
+{
+    /* Put the ISR section at the start of the flash area */
+    .isr :
+    {
+        /* The first word has to be the initial stack pointer */
+        LONG(__initial_stack_pointer);
+        KEEP(*/init_high.cpp.obj(.isr_vectors))
+    } >FLASH
+    ASSERT(SIZEOF(.isr) > 100, "The isr_vectors section is too small")
+    ASSERT(SIZEOF(.isr) < 1000, "The isr_vectors section is too big")
+    ASSERT(ADDR(.isr) == ORIGIN(FLASH), "The isr_vectors section was not placed at the start of the flash area")
+
+    .text :
+    {
+        *(.text)
+        KEEP(*(.text.*))
+        *(.rodata*)
+    } >FLASH
+
+    .init_arrays :
+    {
+        _init_array_start = .;
+        KEEP(*(.init_array))
+        KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*)))
+        _init_array_end = .;
+    } >FLASH
+
+     . = ORIGIN(RAM);
+
+    .data ALIGN(4) :
+    {
+        *(.data)
+        *(.data.*)
+    } >RAM AT >FLASH
+
+    .bss ALIGN(4) (NOLOAD) :
+    {
+        *(.bss)
+        *(.bss.*)
+    } >RAM
+
+    _copy_data_store = ADDR(.data);
+    _copy_data_store_end = _copy_data_store + SIZEOF(.data);
+    _copy_data_load = LOADADDR(.data);
+
+    _bss_start = ADDR(.bss);
+    _bss_end = _bss_start + SIZEOF(.bss);
+
+    __initial_stack_pointer = ORIGIN(RAM) + LENGTH(RAM) - 1;
+}
diff --git a/stm32f103/toolchain.cmake b/stm32f103/toolchain.cmake
new file mode 100644
index 0000000..2a0e5b8
--- /dev/null
+++ b/stm32f103/toolchain.cmake
@@ -0,0 +1,26 @@
+find_program(MCU_ARM_CC arm-none-eabi-gcc ${MCU_TOOLCHAIN_DIR}/bin)
+find_program(MCU_ARM_CXX arm-none-eabi-g++ ${MCU_TOOLCHAIN_DIR}/bin)
+find_program(MCU_ARM_OBJCOPY arm-none-eabi-objcopy ${MCU_TOOLCHAIN_DIR}/bin)
+find_program(MCU_ARM_OBJDUMP arm-none-eabi-objdump ${MCU_TOOLCHAIN_DIR}/bin)
+find_program(MCU_ARM_READELF arm-none-eabi-readelf ${MCU_TOOLCHAIN_DIR}/bin)
+find_program(MCU_ARM_SIZE arm-none-eabi-size ${MCU_TOOLCHAIN_DIR}/bin)
+find_program(MCU_ARM_NM arm-none-eabi-nm ${MCU_TOOLCHAIN_DIR}/bin)
+
+#message("MCU_ARM_CC      = ${MCU_ARM_CC}")
+#message("MCU_ARM_CXX     = ${MCU_ARM_CXX}")
+#message("MCU_ARM_OBJCOPY = ${MCU_ARM_OBJCOPY}")
+#message("MCU_ARM_SIZE    = ${MCU_ARM_SIZE}")
+
+set(_CMAKE_TOOLCHAIN_PREFIX arm-none-eabi-)
+include(CMakeFindBinUtils)
+
+if (NOT MCU_ARM_CC OR NOT MCU_ARM_CXX OR NOT MCU_ARM_OBJCOPY OR NOT MCU_ARM_SIZE)
+    message(FATAL_ERROR "Could not find required compiler tools.")
+endif()
+
+set(CMAKE_C_COMPILER ${MCU_ARM_CC} CACHE FILE "")
+set(CMAKE_CXX_COMPILER ${MCU_ARM_CXX} CACHE FILE "")
+set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 14)