Added comments about most flags.

Added a bunch of comments to make it more understandable later on.

inc/STM32G0B1CBTx/startup_stm32g0b1cbtx.s

@@ -0,0 +1,296 @@
+/**
+  ******************************************************************************
+  * @file      startup_stm32g0b1xx.s
+  * @author    MCD Application Team
+  * @brief     STM32G0b1xx devices vector table GCC toolchain.
+  *            This module performs:
+  *                - Set the initial SP
+  *                - Set the initial PC == Reset_Handler,
+  *                - Set the vector table entries with the exceptions ISR address
+  *                - Branches to main in the C library (which eventually
+  *                  calls main()).
+  *            After Reset the Cortex-M0+ processor is in Thread mode,
+  *            priority is Privileged, and the Stack is set to Main.
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2018-2021 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+
+.syntax unified
+.cpu cortex-m0plus
+.fpu softvfp
+.thumb
+
+.global g_pfnVectors
+.global Default_Handler
+
+/* start address for the initialization values of the .data section.
+defined in linker script */
+.word _sidata
+/* start address for the .data section. defined in linker script */
+.word _sdata
+/* end address for the .data section. defined in linker script */
+.word _edata
+/* start address for the .bss section. defined in linker script */
+.word _sbss
+/* end address for the .bss section. defined in linker script */
+.word _ebss
+
+/**
+ * @brief  This is the code that gets called when the processor first
+ *          starts execution following a reset event. Only the absolutely
+ *          necessary set is performed, after which the application
+ *          supplied main() routine is called.
+ * @param  None
+ * @retval None
+*/
+
+  .section .text.Reset_Handler
+  .weak Reset_Handler
+  .type Reset_Handler, %function
+Reset_Handler:
+  ldr   r0, =_estack
+  mov   sp, r0          /* set stack pointer */
+
+/* Call the clock system initialization function.*/
+  bl  SystemInit
+
+/* Copy the data segment initializers from flash to SRAM */
+  ldr r0, =_sdata
+  ldr r1, =_edata
+  ldr r2, =_sidata
+  movs r3, #0
+  b LoopCopyDataInit
+
+CopyDataInit:
+  ldr r4, [r2, r3]
+  str r4, [r0, r3]
+  adds r3, r3, #4
+
+LoopCopyDataInit:
+  adds r4, r0, r3
+  cmp r4, r1
+  bcc CopyDataInit
+
+/* Zero fill the bss segment. */
+  ldr r2, =_sbss
+  ldr r4, =_ebss
+  movs r3, #0
+  b LoopFillZerobss
+
+FillZerobss:
+  str  r3, [r2]
+  adds r2, r2, #4
+
+LoopFillZerobss:
+  cmp r2, r4
+  bcc FillZerobss
+
+/* Call static constructors */
+  bl __libc_init_array
+/* Call the application s entry point.*/
+  bl main
+
+LoopForever:
+  b LoopForever
+
+.size Reset_Handler, .-Reset_Handler
+
+/**
+ * @brief  This is the code that gets called when the processor receives an
+ *         unexpected interrupt.  This simply enters an infinite loop, preserving
+ *         the system state for examination by a debugger.
+ *
+ * @param  None
+ * @retval None
+*/
+  .section .text.Default_Handler,"ax",%progbits
+Default_Handler:
+Infinite_Loop:
+  b Infinite_Loop
+  .size Default_Handler, .-Default_Handler
+
+/******************************************************************************
+*
+* The minimal vector table for a Cortex M0.  Note that the proper constructs
+* must be placed on this to ensure that it ends up at physical address
+* 0x0000.0000.
+*
+******************************************************************************/
+  .section .isr_vector,"a",%progbits
+  .type g_pfnVectors, %object
+
+g_pfnVectors:
+  .word _estack
+  .word Reset_Handler
+  .word NMI_Handler
+  .word HardFault_Handler
+  .word 0
+  .word 0
+  .word 0
+  .word 0
+  .word 0
+  .word 0
+  .word 0
+  .word SVC_Handler
+  .word 0
+  .word 0
+  .word PendSV_Handler
+  .word SysTick_Handler
+  .word WWDG_IRQHandler                   /* Window WatchDog              */
+  .word PVD_VDDIO2_IRQHandler             /* PVD through EXTI Line detect */
+  .word RTC_TAMP_IRQHandler               /* RTC through the EXTI line    */
+  .word FLASH_IRQHandler                  /* FLASH                        */
+  .word RCC_CRS_IRQHandler                /* RCC & CRS                    */
+  .word EXTI0_1_IRQHandler                /* EXTI Line 0 and 1            */
+  .word EXTI2_3_IRQHandler                /* EXTI Line 2 and 3            */
+  .word EXTI4_15_IRQHandler               /* EXTI Line 4 to 15            */
+  .word USB_UCPD1_2_IRQHandler            /* USB, UCPD1, UCPD2            */
+  .word DMA1_Channel1_IRQHandler          /* DMA1 Channel 1               */
+  .word DMA1_Channel2_3_IRQHandler        /* DMA1 Channel 2 and Channel 3 */
+  .word DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQHandler /* DMA1 Ch4 to Ch7, DMA2 Ch1 to Ch5, DMAMUX1 overrun */
+  .word ADC1_COMP_IRQHandler              /* ADC1, COMP1 and COMP2         */
+  .word TIM1_BRK_UP_TRG_COM_IRQHandler    /* TIM1 Break, Update, Trigger and Commutation */
+  .word TIM1_CC_IRQHandler                /* TIM1 Capture Compare         */
+  .word TIM2_IRQHandler                   /* TIM2                         */
+  .word TIM3_TIM4_IRQHandler              /* TIM3, TIM4                   */
+  .word TIM6_DAC_LPTIM1_IRQHandler        /* TIM6, DAC and LPTIM1         */
+  .word TIM7_LPTIM2_IRQHandler            /* TIM7 and LPTIM2              */
+  .word TIM14_IRQHandler                  /* TIM14                        */
+  .word TIM15_IRQHandler                  /* TIM15                        */
+  .word TIM16_FDCAN_IT0_IRQHandler        /* TIM16 & FDCAN1_IT0 & FDCAN2_IT0 */
+  .word TIM17_FDCAN_IT1_IRQHandler        /* TIM17 & FDCAN1_IT1 & FDCAN2_IT1 */
+  .word I2C1_IRQHandler                   /* I2C1                         */
+  .word I2C2_3_IRQHandler                 /* I2C2, I2C3                   */
+  .word SPI1_IRQHandler                   /* SPI1                         */
+  .word SPI2_3_IRQHandler                 /* SPI2, SPI3                   */
+  .word USART1_IRQHandler                 /* USART1                       */
+  .word USART2_LPUART2_IRQHandler         /* USART2 & LPUART2             */
+  .word USART3_4_5_6_LPUART1_IRQHandler   /* USART3, USART4, USART5, USART6, LPUART1   */
+  .word CEC_IRQHandler                    /* CEC                          */
+
+  .size g_pfnVectors, .-g_pfnVectors
+
+/*******************************************************************************
+*
+* Provide weak aliases for each Exception handler to the Default_Handler.
+* As they are weak aliases, any function with the same name will override
+* this definition.
+*
+*******************************************************************************/
+
+  .weak      NMI_Handler
+  .thumb_set NMI_Handler,Default_Handler
+
+  .weak      HardFault_Handler
+  .thumb_set HardFault_Handler,Default_Handler
+
+  .weak      SVC_Handler
+  .thumb_set SVC_Handler,Default_Handler
+
+  .weak      PendSV_Handler
+  .thumb_set PendSV_Handler,Default_Handler
+
+  .weak      SysTick_Handler
+  .thumb_set SysTick_Handler,Default_Handler
+
+  .weak      WWDG_IRQHandler
+  .thumb_set WWDG_IRQHandler,Default_Handler
+
+  .weak      PVD_VDDIO2_IRQHandler
+  .thumb_set PVD_VDDIO2_IRQHandler,Default_Handler
+
+  .weak      RTC_TAMP_IRQHandler
+  .thumb_set RTC_TAMP_IRQHandler,Default_Handler
+
+  .weak      FLASH_IRQHandler
+  .thumb_set FLASH_IRQHandler,Default_Handler
+
+  .weak      RCC_CRS_IRQHandler
+  .thumb_set RCC_CRS_IRQHandler,Default_Handler
+
+  .weak      EXTI0_1_IRQHandler
+  .thumb_set EXTI0_1_IRQHandler,Default_Handler
+
+  .weak      EXTI2_3_IRQHandler
+  .thumb_set EXTI2_3_IRQHandler,Default_Handler
+
+  .weak      EXTI4_15_IRQHandler
+  .thumb_set EXTI4_15_IRQHandler,Default_Handler
+
+  .weak      USB_UCPD1_2_IRQHandler
+  .thumb_set USB_UCPD1_2_IRQHandler,Default_Handler
+
+  .weak      DMA1_Channel1_IRQHandler
+  .thumb_set DMA1_Channel1_IRQHandler,Default_Handler
+
+  .weak      DMA1_Channel2_3_IRQHandler
+  .thumb_set DMA1_Channel2_3_IRQHandler,Default_Handler
+
+  .weak      DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQHandler
+  .thumb_set DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQHandler,Default_Handler
+
+  .weak      ADC1_COMP_IRQHandler
+  .thumb_set ADC1_COMP_IRQHandler,Default_Handler
+
+  .weak      TIM1_BRK_UP_TRG_COM_IRQHandler
+  .thumb_set TIM1_BRK_UP_TRG_COM_IRQHandler,Default_Handler
+
+  .weak      TIM1_CC_IRQHandler
+  .thumb_set TIM1_CC_IRQHandler,Default_Handler
+
+  .weak      TIM2_IRQHandler
+  .thumb_set TIM2_IRQHandler,Default_Handler
+
+  .weak      TIM3_TIM4_IRQHandler
+  .thumb_set TIM3_TIM4_IRQHandler,Default_Handler
+
+  .weak      TIM6_DAC_LPTIM1_IRQHandler
+  .thumb_set TIM6_DAC_LPTIM1_IRQHandler,Default_Handler
+
+  .weak      TIM7_LPTIM2_IRQHandler
+  .thumb_set TIM7_LPTIM2_IRQHandler,Default_Handler
+
+  .weak      TIM14_IRQHandler
+  .thumb_set TIM14_IRQHandler,Default_Handler
+
+  .weak      TIM15_IRQHandler
+  .thumb_set TIM15_IRQHandler,Default_Handler
+
+  .weak      TIM16_FDCAN_IT0_IRQHandler
+  .thumb_set TIM16_FDCAN_IT0_IRQHandler,Default_Handler
+
+  .weak      TIM17_FDCAN_IT1_IRQHandler
+  .thumb_set TIM17_FDCAN_IT1_IRQHandler,Default_Handler
+
+  .weak      I2C1_IRQHandler
+  .thumb_set I2C1_IRQHandler,Default_Handler
+
+  .weak      I2C2_3_IRQHandler
+  .thumb_set I2C2_3_IRQHandler,Default_Handler
+
+  .weak      SPI1_IRQHandler
+  .thumb_set SPI1_IRQHandler,Default_Handler
+
+  .weak      SPI2_3_IRQHandler
+  .thumb_set SPI2_3_IRQHandler,Default_Handler
+
+  .weak      USART1_IRQHandler
+  .thumb_set USART1_IRQHandler,Default_Handler
+
+  .weak      USART2_LPUART2_IRQHandler
+  .thumb_set USART2_LPUART2_IRQHandler,Default_Handler
+
+  .weak      USART3_4_5_6_LPUART1_IRQHandler
+  .thumb_set USART3_4_5_6_LPUART1_IRQHandler,Default_Handler
+
+  .weak      CEC_IRQHandler
+  .thumb_set CEC_IRQHandler,Default_Handler

linker_scripts/STM32G0B1CBTX_FLASH.ld

@@ -0,0 +1,185 @@
+/*
+******************************************************************************
+**
+** @file        : LinkerScript.ld
+**
+** @author      : Auto-generated by STM32CubeIDE
+**
+** @brief       : Linker script for STM32G0B1CBTx Device from STM32G0 series
+**                      128Kbytes FLASH
+**                      144Kbytes RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used
+**
+**  Target      : STMicroelectronics STM32
+**
+**  Distribution: The file is distributed as is, without any warranty
+**                of any kind.
+**
+******************************************************************************
+** @attention
+**
+** Copyright (c) 2025 STMicroelectronics.
+** All rights reserved.
+**
+** This software is licensed under terms that can be found in the LICENSE file
+** in the root directory of this software component.
+** If no LICENSE file comes with this software, it is provided AS-IS.
+**
+******************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 0x200; /* required amount of heap */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+  RAM    (xrw)    : ORIGIN = 0x20000000,   LENGTH = 144K
+  FLASH    (rx)    : ORIGIN = 0x8000000,   LENGTH = 128K
+}
+
+/* Sections */
+SECTIONS
+{
+  /* The startup code into "FLASH" Rom type memory */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data into "FLASH" Rom type memory */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data into "FLASH" Rom type memory */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab   : {
+    . = ALIGN(4);
+    *(.ARM.extab* .gnu.linkonce.armextab.*)
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM : {
+    . = ALIGN(4);
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+    . = ALIGN(4);
+  } >FLASH
+
+  .preinit_array     :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .init_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .fini_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  /* Used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections into "RAM" Ram type memory */
+  .data :
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+    *(.RamFunc)        /* .RamFunc sections */
+    *(.RamFunc*)       /* .RamFunc* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+
+  } >RAM AT> FLASH
+
+  /* Uninitialized data section into "RAM" Ram type memory */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss section */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  /* Remove information from the compiler libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}

linker_scripts/STM32G0B1CBTX_RAM.ld

@@ -0,0 +1,185 @@
+/*
+******************************************************************************
+**
+** @file        : LinkerScript.ld (debug in RAM dedicated)
+**
+** @author      : Auto-generated by STM32CubeIDE
+**
+** @brief       : Linker script for STM32G0B1CBTx Device from STM32G0 series
+**                      128Kbytes FLASH
+**                      144Kbytes RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used
+**
+**  Target      : STMicroelectronics STM32
+**
+**  Distribution: The file is distributed as is, without any warranty
+**                of any kind.
+**
+******************************************************************************
+** @attention
+**
+** Copyright (c) 2025 STMicroelectronics.
+** All rights reserved.
+**
+** This software is licensed under terms that can be found in the LICENSE file
+** in the root directory of this software component.
+** If no LICENSE file comes with this software, it is provided AS-IS.
+**
+******************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 0x200; /* required amount of heap */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+  RAM    (xrw)    : ORIGIN = 0x20000000,   LENGTH = 144K
+  FLASH    (rx)    : ORIGIN = 0x8000000,   LENGTH = 128K
+}
+
+/* Sections */
+SECTIONS
+{
+  /* The startup code into "RAM" Ram type memory */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >RAM
+
+  /* The program code and other data into "RAM" Ram type memory */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+    *(.RamFunc)        /* .RamFunc sections */
+    *(.RamFunc*)       /* .RamFunc* sections */
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >RAM
+
+  /* Constant data into "RAM" Ram type memory */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >RAM
+
+  .ARM.extab   : {
+    . = ALIGN(4);
+    *(.ARM.extab* .gnu.linkonce.armextab.*)
+    . = ALIGN(4);
+  } >RAM
+
+  .ARM : {
+    . = ALIGN(4);
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+    . = ALIGN(4);
+  } >RAM
+
+  .preinit_array     :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+  } >RAM
+
+  .init_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+  } >RAM
+
+  .fini_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    . = ALIGN(4);
+  } >RAM
+
+  /* Used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections into "RAM" Ram type memory */
+  .data :
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+
+  } >RAM
+
+  /* Uninitialized data section into "RAM" Ram type memory */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss section */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  /* Remove information from the compiler libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}

notes.md

@@ -0,0 +1,30 @@
+# Notes
+
+This is where I'm putting my notes on this project and where I'm hitting
+challenges in setting up stuff.
+
+## Challanges
+
+- [ ] linker stuff.
+- [ ] toolchain file arguments.
+- [ ] CMSIS understanding
+- [ ] STM32 HAL support and understanding.
+- [ ] Better directory layout.
+- [ ] debugging across platforms/os.
+
+
+## Basics
+
+I need to walk before I run I suppose.
+
+AKA I should try to eliminate the fancy shit and just get it to correctly
+build an flashable binary that blinks an led correctly on my
+development board.
+
+- [X] Remove RTOS stuff
+- [X] Remove CMSIS stuff
+- [X] Remove Unity test framework stuff.
+- [X] Remove HAL stuff.
+- [X] Remove doxygen stuff from toolchain file.
+- [ ] Check through debuging flags in toolchain file.
+

stm32-toolchain.cmake

@@ -21,21 +21,21 @@ set(CMAKE_SYSTEM_VERSION 1)
 #-------------------
 
 # Specify the exact Chip
-set(MCU STM32F103xx)
+#set(MCU STM32F103xx)
 # set(MCU STM32F441xx)
 # set(MCU STM32F446xx)
-# set(MCU STM32G0B1xx)
-set(MCU_DIR include/STM32F1xx/)
-set(MCU_DIR include/STM32F4xx/)
-set(MCU_DIR include/STM32G0xx/)
-set(MCU_SPEC cortex-m3)
-set(MCU_SPEC cortex-m4)
-set(MCU_SPEC cortex-m0+) # Might need to change?
+set(MCU STM32G0B1CBTx)
+
+set(MCU_DIR inc/${MCU}/)
+
+#set(MCU_SPEC cortex-m3)
+#set(MCU_SPEC cortex-m4)
+set(MCU_SPEC cortex-m0plus) # Might need to change?
 # set(FLOAT_SPEC "-mfloat-abi=hard -mfpu=fpv4-sp-d16")
 
 # The Startup(ASM) files
-
 string(TOLOWER startup_${MCU}.s STARTUP_FILE_NAME)
+
 set(STARTUP_FILE ${MCU_DIR}/Source/Templates/gcc/${STARTUP_FILE_NAME})
 set(SYSTEM_FILE  ${MCU_DIR}/Source/Templates/system_stm32f4xx.c)
 
@@ -47,33 +47,8 @@ set(HSE_VAL 8000000)
 set(LINKER_SCRIPT linker.ld)
 
 # Programmer and debugging 
-set(PROGRAMMER serialupdi)
-set(PORT /dev/ttyU0)
-
-#-------------------
-# HAL Setup
-#-------------------
-# Select 1 if STM32 HAL library is to be used. This will add -DUSE_HAL_DRIVER=1 to the CFLAGS
-# If enabled then set the correct path of the HAL Driver folder
-#set(USE_HAL = 1
-#ifeq (1,$(USE_HAL))
-set(HAL_DIR components/STM32F4xx_HAL_Driver)
-#endif
-
-#-------------------
-# RTOS Setup
-#-------------------
-# Path to FreeRTOS Kernel
-set(RTOS_DIR components/FreeRTOS-Kernel)
-# Modify this to the path where your micrcontroller specific port is
-set(RTOS_DIR_MCU ${RTOS_DIR}/portable/GCC/ARM_CM4F) # For cortex-m4 microcontroller
-set(RTOS_HEAP    ${RTOS_DIR}/portable/MemMang/heap_4.c) # Select which heap implementation to use
-
-#-------------------
-# CMSIS Setup
-#-------------------
-# Set the path to the CMSIS folder
-set(CMSIS_DIR components/CMSIS/CMSIS)
+#set(PROGRAMMER serialupdi)
+#set(PORT /dev/ttyU0)
 
 ##################################################
 # Advanced Section
@@ -83,25 +58,11 @@ set(CMSIS_DIR components/CMSIS/CMSIS)
 # General Flags
 #-------------------
 
-# The old AVR ones I had written 
-# Define the toolchain executables
-#set(CMAKE_C_COMPILER avr-gcc)
-#set(CMAKE_CXX_COMPILER avr-g++)
-#set(CMAKE_ASM_COMPILER avr-gcc)
-#set(CMAKE_LINKER avr-ld)
-#set(CMAKE_OBJCOPY avr-objcopy)
-#set(CMAKE_SIZE avr-size)
-
-
-# Define compile options
-#set(CMAKE_C_FLAGS " -Os -mmcu=${AVR_MCU} -DF_CPU=${F_CPU}")
-#set(CMAKE_CXX_FLAGS "-mmcu=${AVR_MCU} -DF_CPU=${F_CPU}")
-#set(CMAKE_EXE_LINKER_FLAGS_INIT "-mmcu=${AVR_MCU}")
-
-
-#-------------------
-# General Flags
-#-------------------
+# "-fno-builtin"::
+# "-Wall":: Enables all warnings man page line:4385 
+# "-ffunction-sections":: Puts each function into it's own section
+# "-fdata-sections":: Puts each data chunk into it's own section.
+# "-fomit-frame-pointer"::
 set(OBJECT_GEN_FLAGS " \
 -fno-builtin \
 -Wall \
@@ -125,6 +86,10 @@ set(CMAKE_ASM_FLAGS " \
 #-------------------
 # LFLAGS for cross
 #-------------------
+
+# "-Wl":: Pass option as option to the linker.
+# "-Map":: Map file passed to linker(an output?)
+# "--gc-sections":: linkage garbage collector, part of shrinking size.
 set(CMAKE_EXE_LINKER_FLAGS " \
 -Wl,-Map=${PROJECT_NAME}.map \
 -Wl,--print-memory-usage \
@@ -134,6 +99,11 @@ set(CMAKE_EXE_LINKER_FLAGS " \
 #------------------
 # Debug Flags
 #------------------
+
+# "-Og":: Optimizes for debugging expirence.
+# "-g":: Debugging options 
+# "-gdwarf-3":: Selection of the format version 3
+# "-gstrict-dwarf":: Disallow using extensions of later dwarf standards.
 set(CMAKE_C_FLAGS_DEBUG "-Og -g -gdwarf-3 -gstrict-dwarf " CACHE INTERNAL "C Compiler options for debug build type")
 set(CMAKE_CXX_FLAGS_DEBUG "-Og -g -gdwarf-3 -gstrict-dwarf " CACHE INTERNAL "C++ Compiler options for debug build type")
 set(CMAKE_ASM_FLAGS_DEBUG "-Og -g -gdwarf-3 -gstrict-dwarf " CACHE INTERNAL "ASM Compiler options for debug build type")
@@ -142,6 +112,9 @@ set(CMAKE_EXE_LINKER_FLAGS_DEBUG "" CACHE INTERNAL "Linker options for debug bui
 #------------------
 # Release Flags
 #-----------------
+
+# "-Os":: Optimizes for space.
+# "-flto":: Link Time Optimization
 set(CMAKE_C_FLAGS_RELEASE "-Os -flto " CACHE INTERNAL "C Compiler options for release build type")
 set(CMAKE_CXX_FLAGS_RELEASE "-Os -flto " CACHE INTERNAL "C++ Compiler options for release build type")
 set(CMAKE_ASM_FLAGS_RELEASE "" CACHE INTERNAL "ASM Compiler options for release build type")
@@ -254,49 +227,6 @@ if(TARGET_GROUP STREQUAL production)
     # @Brief: Build the actual elf file of the project
     ######################################################################
 
-    #-------------------
-    # HAL library
-    #-------------------
-    file(GLOB HAL_SRC
-        "${HAL_DIR}/Src/*.c"
-        )
-    add_library(hal STATIC
-        ${HAL_SRC}
-        )
-    target_include_directories(hal
-        PUBLIC
-        ${HAL_DIR}/Inc
-        ${MCU_DIR}/Include
-        ${CMSIS_DIR}/Core/Include
-        PRIVATE
-        ${PROJECT_SOURCE_DIR}/include
-        )
-    target_compile_definitions(hal
-        PUBLIC
-        ${MCU}
-        HSE_VALUE=${HSE_VAL}
-        )
-
-    #-------------------
-    # FreeRTOS library
-    #-------------------
-    string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE "-Wl,--undefined=vTaskSwitchContext ")
-    file(GLOB RTOS_SRC
-        "${RTOS_DIR}/*.c"
-        "${RTOS_DIR_MCU}/*.c"
-        ${RTOS_HEAP}
-        )
-    add_library(rtos STATIC
-        ${RTOS_SRC}
-        )
-    target_include_directories(rtos
-        PUBLIC
-        ${RTOS_DIR}/include
-        ${RTOS_DIR_MCU}
-        PRIVATE
-        ${PROJECT_SOURCE_DIR}/include
-        )
-
     #-------------------
     # Main elf
     #-------------------
@@ -343,67 +273,12 @@ if(TARGET_GROUP STREQUAL production)
         -ex "monitor arm semihosting enable"
         )
 
-    ######################################################################
-    # @Target: doc
-    # @Brief: Generate doxygen documentation
-    ######################################################################
-    # check if Doxygen is installed
-    find_package(Doxygen)
-    if (DOXYGEN_FOUND)
-        # set input and output files
-        set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/docs/Doxyfile.in)
-        set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
-
-        # exclude folders while making documentation
-        # should be separated by spaces
-        set(DOXYGEN_EXCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/components/* ${CMAKE_CURRENT_SOURCE_DIR}/build/* ${CMAKE_CURRENT_SOURCE_DIR}/${MCU_DIR}*")
-
-        # set mainpage in doxygen
-        set(DOXYGEN_MAIN_PAGE "README.md")
-
-        # request to configure the file
-        configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
-        message("Doxygen build started")
-
-        # note the option ALL which allows to build the docs together with the application
-        add_custom_target(docs
-            COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
-            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-            COMMENT "Generating API documentation with Doxygen"
-            VERBATIM )
-    else (DOXYGEN_FOUND)
-        message("Doxygen need to be installed to generate the doxygen documentation")
-    endif (DOXYGEN_FOUND)
-
     # Add additional files to the make clean
     set_property(DIRECTORY PROPERTY ADDITIONAL_MAKE_CLEAN_FILES
         "${PROJECT_NAME}.map"
         "${CMAKE_CURRENT_BINARY_DIR}/html"
         "${CMAKE_CURRENT_BINARY_DIR}/latex"
         )
-
-elseif(TARGET_GROUP STREQUAL test)
-
-    add_library(unity STATIC
-        components/unity/unity.c
-        )
-
-    target_include_directories(unity PUBLIC
-        components/unity/
-        )
-
-    enable_testing()
-    include(CTest)
-    add_subdirectory(test)
-
-    set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR})
-    include(CodeCoverage)
-    setup_target_for_coverage_lcov(
-        NAME coverage
-        EXCLUDE "/usr/include/x86_64-linux-gnu/*" "components/unity/*"
-        EXECUTABLE ctest -V
-        DEPENDENCIES simple_module
-        )
 else()
     message(FATAL_ERROR "Given TARGET_GROUP unknown")
 endif()