uploaded code

master
Clyne Sullivan
parent 8217c76e22
commit f0f7ae0abc

2
.gitignore vendored

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out/*
main.hex

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MCUFLAGS = -mthumb -mcpu=cortex-m4
CFLAGS = -Iinclude $(MCUFLAGS)
all:
arm-none-eabi-as $(MCUFLAGS) startup_stm32l476xx.s -c -o out/startup_stm32l476xx.o
arm-none-eabi-gcc $(CFLAGS) system_stm32l4xx.c -c -o out/system_stm32l4xx.o
arm-none-eabi-gcc $(CFLAGS) stm32l4xx_it.c -c -o out/stm32l4xx_it.o
arm-none-eabi-gcc $(CFLAGS) main.c -c -o out/main.o
arm-none-eabi-gcc $(CFLAGS) -T link.ld out/*.o -o out/main.elf
arm-none-eabi-objcopy -O ihex out/main.elf main.hex
clean:
rm -rf out/*

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/**************************************************************************//**
* @file core_cmFunc.h
* @brief CMSIS Cortex-M Core Function Access Header File
* @version V4.30
* @date 20. October 2015
******************************************************************************/
/* Copyright (c) 2009 - 2015 ARM LIMITED
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of ARM nor the names of its contributors may be used
to endorse or promote products derived from this software without
specific prior written permission.
*
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------*/
#if defined ( __ICCARM__ )
#pragma system_include /* treat file as system include file for MISRA check */
#elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#pragma clang system_header /* treat file as system include file */
#endif
#ifndef __CORE_CMFUNC_H
#define __CORE_CMFUNC_H
/* ########################### Core Function Access ########################### */
/** \ingroup CMSIS_Core_FunctionInterface
\defgroup CMSIS_Core_RegAccFunctions CMSIS Core Register Access Functions
@{
*/
/*------------------ RealView Compiler -----------------*/
#if defined ( __CC_ARM )
#include "cmsis_armcc.h"
/*------------------ ARM Compiler V6 -------------------*/
#elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#include "cmsis_armcc_V6.h"
/*------------------ GNU Compiler ----------------------*/
#elif defined ( __GNUC__ )
#include "cmsis_gcc.h"
/*------------------ ICC Compiler ----------------------*/
#elif defined ( __ICCARM__ )
#include <cmsis_iar.h>
/*------------------ TI CCS Compiler -------------------*/
#elif defined ( __TMS470__ )
#include <cmsis_ccs.h>
/*------------------ TASKING Compiler ------------------*/
#elif defined ( __TASKING__ )
/*
* The CMSIS functions have been implemented as intrinsics in the compiler.
* Please use "carm -?i" to get an up to date list of all intrinsics,
* Including the CMSIS ones.
*/
/*------------------ COSMIC Compiler -------------------*/
#elif defined ( __CSMC__ )
#include <cmsis_csm.h>
#endif
/*@} end of CMSIS_Core_RegAccFunctions */
#endif /* __CORE_CMFUNC_H */

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/**************************************************************************//**
* @file core_cmInstr.h
* @brief CMSIS Cortex-M Core Instruction Access Header File
* @version V4.30
* @date 20. October 2015
******************************************************************************/
/* Copyright (c) 2009 - 2015 ARM LIMITED
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of ARM nor the names of its contributors may be used
to endorse or promote products derived from this software without
specific prior written permission.
*
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------*/
#if defined ( __ICCARM__ )
#pragma system_include /* treat file as system include file for MISRA check */
#elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#pragma clang system_header /* treat file as system include file */
#endif
#ifndef __CORE_CMINSTR_H
#define __CORE_CMINSTR_H
/* ########################## Core Instruction Access ######################### */
/** \defgroup CMSIS_Core_InstructionInterface CMSIS Core Instruction Interface
Access to dedicated instructions
@{
*/
/* CHIBIOS FIX */
#if !defined(__CORTEX_SC)
#define __CORTEX_SC 0
#endif
/*------------------ RealView Compiler -----------------*/
#if defined ( __CC_ARM )
#include "cmsis_armcc.h"
/*------------------ ARM Compiler V6 -------------------*/
#elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#include "cmsis_armcc_V6.h"
/*------------------ GNU Compiler ----------------------*/
#elif defined ( __GNUC__ )
#include "cmsis_gcc.h"
/*------------------ ICC Compiler ----------------------*/
#elif defined ( __ICCARM__ )
#include <cmsis_iar.h>
/*------------------ TI CCS Compiler -------------------*/
#elif defined ( __TMS470__ )
#include <cmsis_ccs.h>
/*------------------ TASKING Compiler ------------------*/
#elif defined ( __TASKING__ )
/*
* The CMSIS functions have been implemented as intrinsics in the compiler.
* Please use "carm -?i" to get an up to date list of all intrinsics,
* Including the CMSIS ones.
*/
/*------------------ COSMIC Compiler -------------------*/
#elif defined ( __CSMC__ )
#include <cmsis_csm.h>
#endif
/*@}*/ /* end of group CMSIS_Core_InstructionInterface */
#endif /* __CORE_CMINSTR_H */

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/**************************************************************************//**
* @file core_cmSimd.h
* @brief CMSIS Cortex-M SIMD Header File
* @version V4.30
* @date 20. October 2015
******************************************************************************/
/* Copyright (c) 2009 - 2015 ARM LIMITED
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of ARM nor the names of its contributors may be used
to endorse or promote products derived from this software without
specific prior written permission.
*
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------*/
#if defined ( __ICCARM__ )
#pragma system_include /* treat file as system include file for MISRA check */
#elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#pragma clang system_header /* treat file as system include file */
#endif
#ifndef __CORE_CMSIMD_H
#define __CORE_CMSIMD_H
#ifdef __cplusplus
extern "C" {
#endif
/* ################### Compiler specific Intrinsics ########################### */
/** \defgroup CMSIS_SIMD_intrinsics CMSIS SIMD Intrinsics
Access to dedicated SIMD instructions
@{
*/
/*------------------ RealView Compiler -----------------*/
#if defined ( __CC_ARM )
#include "cmsis_armcc.h"
/*------------------ ARM Compiler V6 -------------------*/
#elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#include "cmsis_armcc_V6.h"
/*------------------ GNU Compiler ----------------------*/
#elif defined ( __GNUC__ )
#include "cmsis_gcc.h"
/*------------------ ICC Compiler ----------------------*/
#elif defined ( __ICCARM__ )
#include <cmsis_iar.h>
/*------------------ TI CCS Compiler -------------------*/
#elif defined ( __TMS470__ )
#include <cmsis_ccs.h>
/*------------------ TASKING Compiler ------------------*/
#elif defined ( __TASKING__ )
/*
* The CMSIS functions have been implemented as intrinsics in the compiler.
* Please use "carm -?i" to get an up to date list of all intrinsics,
* Including the CMSIS ones.
*/
/*------------------ COSMIC Compiler -------------------*/
#elif defined ( __CSMC__ )
#include <cmsis_csm.h>
#endif
/*@} end of group CMSIS_SIMD_intrinsics */
#ifdef __cplusplus
}
#endif
#endif /* __CORE_CMSIMD_H */

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/**
******************************************************************************
* @file system_stm32l4xx.h
* @author MCD Application Team
* @version V1.1.1
* @date 29-April-2016
* @brief CMSIS Cortex-M4 Device System Source File for STM32L4xx devices.
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32l4xx_system
* @{
*/
/**
* @brief Define to prevent recursive inclusion
*/
#ifndef __SYSTEM_STM32L4XX_H
#define __SYSTEM_STM32L4XX_H
#ifdef __cplusplus
extern "C" {
#endif
/** @addtogroup STM32L4xx_System_Includes
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Variables
* @{
*/
/* The SystemCoreClock variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetSysClockFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Note: If you use this function to configure the system clock; then there
is no need to call the 2 first functions listed above, since SystemCoreClock
variable is updated automatically.
*/
extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */
extern const uint8_t AHBPrescTable[16]; /*!< AHB prescalers table values */
extern const uint8_t APBPrescTable[8]; /*!< APB prescalers table values */
extern const uint32_t MSIRangeTable[12]; /*!< MSI ranges table values */
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Constants
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Macros
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Functions
* @{
*/
extern void SystemInit(void);
extern void SystemCoreClockUpdate(void);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /*__SYSTEM_STM32L4XX_H */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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/*
*****************************************************************************
**
** File : LinkerScript.ld
**
** Abstract : Linker script for STM32L476RGTx Device with
** 1024KByte FLASH, 96KByte 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.
**
** (c)Copyright Ac6.
** You may use this file as-is or modify it according to the needs of your
** project. Distribution of this file (unmodified or modified) is not
** permitted. Ac6 permit registered System Workbench for MCU users the
** rights to distribute the assembled, compiled & linked contents of this
** file as part of an application binary file, provided that it is built
** using the System Workbench for MCU toolchain.
**
*****************************************************************************
*/
/* Entry Point */
ENTRY(Reset_Handler)
/* Highest address of the user mode stack */
_estack = 0x20018000; /* end of RAM */
/* Generate a link error if heap and stack don't fit into RAM */
_Min_Heap_Size = 0x200;; /* required amount of heap */
_Min_Stack_Size = 0x400;; /* required amount of stack */
/* Specify the memory areas */
MEMORY
{
FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 1024K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 96K
}
/* Define output sections */
SECTIONS
{
/* The startup code goes first into FLASH */
.isr_vector :
{
. = ALIGN(8);
KEEP(*(.isr_vector)) /* Startup code */
. = ALIGN(8);
} >FLASH
/* The program code and other data goes into FLASH */
.text :
{
. = ALIGN(8);
*(.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(8);
_etext = .; /* define a global symbols at end of code */
} >FLASH
/* Constant data goes into FLASH */
.rodata :
{
. = ALIGN(8);
*(.rodata) /* .rodata sections (constants, strings, etc.) */
*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
. = ALIGN(8);
} >FLASH
.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
.ARM : {
__exidx_start = .;
*(.ARM.exidx*)
__exidx_end = .;
} >FLASH
.preinit_array :
{
PROVIDE_HIDDEN (__preinit_array_start = .);
KEEP (*(.preinit_array*))
PROVIDE_HIDDEN (__preinit_array_end = .);
} >FLASH
.init_array :
{
PROVIDE_HIDDEN (__init_array_start = .);
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array*))
PROVIDE_HIDDEN (__init_array_end = .);
} >FLASH
.fini_array :
{
PROVIDE_HIDDEN (__fini_array_start = .);
KEEP (*(SORT(.fini_array.*)))
KEEP (*(.fini_array*))
PROVIDE_HIDDEN (__fini_array_end = .);
} >FLASH
/* used by the startup to initialize data */
_sidata = LOADADDR(.data);
/* Initialized data sections goes into RAM, load LMA copy after code */
.data :
{
. = ALIGN(8);
_sdata = .; /* create a global symbol at data start */
*(.data) /* .data sections */
*(.data*) /* .data* sections */
. = ALIGN(8);
_edata = .; /* define a global symbol at data end */
} >RAM AT> FLASH
/* Uninitialized data section */
. = ALIGN(4);
.bss :
{
/* This is used by the startup in order to initialize the .bss secion */
_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 left */
._user_heap_stack :
{
. = ALIGN(4);
PROVIDE ( end = . );
PROVIDE ( _end = . );
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
. = ALIGN(4);
} >RAM
/* Remove information from the standard libraries */
/DISCARD/ :
{
libc.a ( * )
libm.a ( * )
libgcc.a ( * )
}
.ARM.attributes 0 : { *(.ARM.attributes) }
}

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#include "stm32l476xx.h"
#define STK_CTRL *((uint32_t *)0xE000E010)
#define STK_LOAD *((uint32_t *)0xE000E014)
#define STK_VAL *((uint32_t *)0xE000E018)
#define STK_CALIB *((uint32_t *)0xE000E01C)
extern void delay(uint32_t count);
/**
* Accomplishments:
* - GPIO in/out
* - got to 40MHz clock
*/
int main(void)
{
// turn on HSI
RCC->CR |= RCC_CR_HSION;
while ((RCC->CR & RCC_CR_HSIRDY) != RCC_CR_HSIRDY);
// get PLLR to 80MHz (max)
// VCO = C * (N/M) -> 16 * (10/1) = 160
// SCLK = VCO / R = 160 / 4 = 40 MHz
RCC->PLLCFGR &= ~(RCC_PLLCFGR_PLLSRC); // source HSI, 16MHz
RCC->PLLCFGR |= RCC_PLLCFGR_PLLSRC_HSI;
RCC->PLLCFGR &= ~(RCC_PLLCFGR_PLLN | RCC_PLLCFGR_PLLM);
RCC->PLLCFGR |= 10 << RCC_PLLCFGR_PLLN_Pos;
RCC->PLLCFGR &= ~(RCC_PLLCFGR_PLLR); // /4
RCC->PLLCFGR |= 1 << RCC_PLLCFGR_PLLR_Pos;
RCC->PLLCFGR |= RCC_PLLCFGR_PLLREN; // PLLR on
// start PLL
RCC->CR |= RCC_CR_PLLON;
while ((RCC->CR & RCC_CR_PLLRDY) != RCC_CR_PLLRDY);
// set system clock to PLL
RCC->CFGR &= ~(RCC_CFGR_SW);
RCC->CFGR |= RCC_CFGR_SW_PLL;
while ((RCC->CFGR & RCC_CFGR_SWS_PLL) != RCC_CFGR_SWS_PLL);
// SysTick setup? Assume 4MHz reset clock
STK_LOAD = 40000;
STK_CTRL |= 0x07; // AHB, inten, enable
RCC->AHB2ENR |= RCC_AHB2ENR_GPIOAEN; // A clk enable
GPIOA->MODER &= ~(GPIO_MODER_MODE5 | GPIO_MODER_MODE0); // A5 -> output, A0 input
GPIOA->MODER |= GPIO_MODER_MODE5_0;
GPIOA->PUPDR &= ~(GPIO_PUPDR_PUPD5 | GPIO_PUPDR_PUPD0);
GPIOA->PUPDR |= GPIO_PUPDR_PUPD5_0 | GPIO_PUPDR_PUPD0_1; // pd for button
while (1) {
delay(500);
//if (GPIOA->IDR & 0x01)
GPIOA->BSRR |= 1 << 5;
delay(500);
//else
GPIOA->BRR |= 1 << 5;
}
}
void _exit(int code)
{ for (;;); }

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#!/bin/bash
openocd -f /usr/share/openocd/scripts/board/st_nucleo_l476rg.cfg \
-c "init; reset halt; flash write_image erase main.hex; reset run; exit"

@ -0,0 +1,524 @@
/**
******************************************************************************
* @file startup_stm32l476xx.s
* @author MCD Application Team
* @brief STM32L476xx 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,
* - Configure the clock system
* - Branches to main in the C library (which eventually
* calls main()).
* After Reset the Cortex-M4 processor is in Thread mode,
* priority is Privileged, and the Stack is set to Main.
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
.syntax unified
.cpu cortex-m4
.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
.equ BootRAM, 0xF1E0F85F
/**
* @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 sp, =_estack /* Atollic update: set stack pointer */
/* Copy the data segment initializers from flash to SRAM */
movs r1, #0
b LoopCopyDataInit
CopyDataInit:
ldr r3, =_sidata
ldr r3, [r3, r1]
str r3, [r0, r1]
adds r1, r1, #4
LoopCopyDataInit:
ldr r0, =_sdata
ldr r3, =_edata
adds r2, r0, r1
cmp r2, r3
bcc CopyDataInit
ldr r2, =_sbss
b LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
movs r3, #0
str r3, [r2], #4
LoopFillZerobss:
ldr r3, = _ebss
cmp r2, r3
bcc FillZerobss
/* Call the clock system intitialization function.*/
bl SystemInit
/* 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-M4. 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
.size g_pfnVectors, .-g_pfnVectors
g_pfnVectors:
.word _estack
.word Reset_Handler
.word NMI_Handler
.word HardFault_Handler
.word MemManage_Handler
.word BusFault_Handler
.word UsageFault_Handler
.word 0
.word 0
.word 0
.word 0
.word SVC_Handler
.word DebugMon_Handler
.word 0
.word PendSV_Handler
.word SysTick_Handler
.word WWDG_IRQHandler
.word PVD_PVM_IRQHandler
.word TAMP_STAMP_IRQHandler
.word RTC_WKUP_IRQHandler
.word FLASH_IRQHandler
.word RCC_IRQHandler
.word EXTI0_IRQHandler
.word EXTI1_IRQHandler
.word EXTI2_IRQHandler
.word EXTI3_IRQHandler
.word EXTI4_IRQHandler
.word DMA1_Channel1_IRQHandler
.word DMA1_Channel2_IRQHandler
.word DMA1_Channel3_IRQHandler
.word DMA1_Channel4_IRQHandler
.word DMA1_Channel5_IRQHandler
.word DMA1_Channel6_IRQHandler
.word DMA1_Channel7_IRQHandler
.word ADC1_2_IRQHandler
.word CAN1_TX_IRQHandler
.word CAN1_RX0_IRQHandler
.word CAN1_RX1_IRQHandler
.word CAN1_SCE_IRQHandler
.word EXTI9_5_IRQHandler
.word TIM1_BRK_TIM15_IRQHandler
.word TIM1_UP_TIM16_IRQHandler
.word TIM1_TRG_COM_TIM17_IRQHandler
.word TIM1_CC_IRQHandler
.word TIM2_IRQHandler
.word TIM3_IRQHandler
.word TIM4_IRQHandler
.word I2C1_EV_IRQHandler
.word I2C1_ER_IRQHandler
.word I2C2_EV_IRQHandler
.word I2C2_ER_IRQHandler
.word SPI1_IRQHandler
.word SPI2_IRQHandler
.word USART1_IRQHandler
.word USART2_IRQHandler
.word USART3_IRQHandler
.word EXTI15_10_IRQHandler
.word RTC_Alarm_IRQHandler
.word DFSDM1_FLT3_IRQHandler
.word TIM8_BRK_IRQHandler
.word TIM8_UP_IRQHandler
.word TIM8_TRG_COM_IRQHandler
.word TIM8_CC_IRQHandler
.word ADC3_IRQHandler
.word FMC_IRQHandler
.word SDMMC1_IRQHandler
.word TIM5_IRQHandler
.word SPI3_IRQHandler
.word UART4_IRQHandler
.word UART5_IRQHandler
.word TIM6_DAC_IRQHandler
.word TIM7_IRQHandler
.word DMA2_Channel1_IRQHandler
.word DMA2_Channel2_IRQHandler
.word DMA2_Channel3_IRQHandler
.word DMA2_Channel4_IRQHandler
.word DMA2_Channel5_IRQHandler
.word DFSDM1_FLT0_IRQHandler
.word DFSDM1_FLT1_IRQHandler
.word DFSDM1_FLT2_IRQHandler
.word COMP_IRQHandler
.word LPTIM1_IRQHandler
.word LPTIM2_IRQHandler
.word OTG_FS_IRQHandler
.word DMA2_Channel6_IRQHandler
.word DMA2_Channel7_IRQHandler
.word LPUART1_IRQHandler
.word QUADSPI_IRQHandler
.word I2C3_EV_IRQHandler
.word I2C3_ER_IRQHandler
.word SAI1_IRQHandler
.word SAI2_IRQHandler
.word SWPMI1_IRQHandler
.word TSC_IRQHandler
.word LCD_IRQHandler
.word 0
.word RNG_IRQHandler
.word FPU_IRQHandler
/*******************************************************************************
*
* 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 MemManage_Handler
.thumb_set MemManage_Handler,Default_Handler
.weak BusFault_Handler
.thumb_set BusFault_Handler,Default_Handler
.weak UsageFault_Handler
.thumb_set UsageFault_Handler,Default_Handler
.weak SVC_Handler
.thumb_set SVC_Handler,Default_Handler
.weak DebugMon_Handler
.thumb_set DebugMon_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_PVM_IRQHandler
.thumb_set PVD_PVM_IRQHandler,Default_Handler
.weak TAMP_STAMP_IRQHandler
.thumb_set TAMP_STAMP_IRQHandler,Default_Handler
.weak RTC_WKUP_IRQHandler
.thumb_set RTC_WKUP_IRQHandler,Default_Handler
.weak FLASH_IRQHandler
.thumb_set FLASH_IRQHandler,Default_Handler
.weak RCC_IRQHandler
.thumb_set RCC_IRQHandler,Default_Handler
.weak EXTI0_IRQHandler
.thumb_set EXTI0_IRQHandler,Default_Handler
.weak EXTI1_IRQHandler
.thumb_set EXTI1_IRQHandler,Default_Handler
.weak EXTI2_IRQHandler
.thumb_set EXTI2_IRQHandler,Default_Handler
.weak EXTI3_IRQHandler
.thumb_set EXTI3_IRQHandler,Default_Handler
.weak EXTI4_IRQHandler
.thumb_set EXTI4_IRQHandler,Default_Handler
.weak DMA1_Channel1_IRQHandler
.thumb_set DMA1_Channel1_IRQHandler,Default_Handler
.weak DMA1_Channel2_IRQHandler
.thumb_set DMA1_Channel2_IRQHandler,Default_Handler
.weak DMA1_Channel3_IRQHandler
.thumb_set DMA1_Channel3_IRQHandler,Default_Handler
.weak DMA1_Channel4_IRQHandler
.thumb_set DMA1_Channel4_IRQHandler,Default_Handler
.weak DMA1_Channel5_IRQHandler
.thumb_set DMA1_Channel5_IRQHandler,Default_Handler
.weak DMA1_Channel6_IRQHandler
.thumb_set DMA1_Channel6_IRQHandler,Default_Handler
.weak DMA1_Channel7_IRQHandler
.thumb_set DMA1_Channel7_IRQHandler,Default_Handler
.weak ADC1_2_IRQHandler
.thumb_set ADC1_2_IRQHandler,Default_Handler
.weak CAN1_TX_IRQHandler
.thumb_set CAN1_TX_IRQHandler,Default_Handler
.weak CAN1_RX0_IRQHandler
.thumb_set CAN1_RX0_IRQHandler,Default_Handler
.weak CAN1_RX1_IRQHandler
.thumb_set CAN1_RX1_IRQHandler,Default_Handler
.weak CAN1_SCE_IRQHandler
.thumb_set CAN1_SCE_IRQHandler,Default_Handler
.weak EXTI9_5_IRQHandler
.thumb_set EXTI9_5_IRQHandler,Default_Handler
.weak TIM1_BRK_TIM15_IRQHandler
.thumb_set TIM1_BRK_TIM15_IRQHandler,Default_Handler
.weak TIM1_UP_TIM16_IRQHandler
.thumb_set TIM1_UP_TIM16_IRQHandler,Default_Handler
.weak TIM1_TRG_COM_TIM17_IRQHandler
.thumb_set TIM1_TRG_COM_TIM17_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_IRQHandler
.thumb_set TIM3_IRQHandler,Default_Handler
.weak TIM4_IRQHandler
.thumb_set TIM4_IRQHandler,Default_Handler
.weak I2C1_EV_IRQHandler
.thumb_set I2C1_EV_IRQHandler,Default_Handler
.weak I2C1_ER_IRQHandler
.thumb_set I2C1_ER_IRQHandler,Default_Handler
.weak I2C2_EV_IRQHandler
.thumb_set I2C2_EV_IRQHandler,Default_Handler
.weak I2C2_ER_IRQHandler
.thumb_set I2C2_ER_IRQHandler,Default_Handler
.weak SPI1_IRQHandler
.thumb_set SPI1_IRQHandler,Default_Handler
.weak SPI2_IRQHandler
.thumb_set SPI2_IRQHandler,Default_Handler
.weak USART1_IRQHandler
.thumb_set USART1_IRQHandler,Default_Handler
.weak USART2_IRQHandler
.thumb_set USART2_IRQHandler,Default_Handler
.weak USART3_IRQHandler
.thumb_set USART3_IRQHandler,Default_Handler
.weak EXTI15_10_IRQHandler
.thumb_set EXTI15_10_IRQHandler,Default_Handler
.weak RTC_Alarm_IRQHandler
.thumb_set RTC_Alarm_IRQHandler,Default_Handler
.weak DFSDM1_FLT3_IRQHandler
.thumb_set DFSDM1_FLT3_IRQHandler,Default_Handler
.weak TIM8_BRK_IRQHandler
.thumb_set TIM8_BRK_IRQHandler,Default_Handler
.weak TIM8_UP_IRQHandler
.thumb_set TIM8_UP_IRQHandler,Default_Handler
.weak TIM8_TRG_COM_IRQHandler
.thumb_set TIM8_TRG_COM_IRQHandler,Default_Handler
.weak TIM8_CC_IRQHandler
.thumb_set TIM8_CC_IRQHandler,Default_Handler
.weak ADC3_IRQHandler
.thumb_set ADC3_IRQHandler,Default_Handler
.weak FMC_IRQHandler
.thumb_set FMC_IRQHandler,Default_Handler
.weak SDMMC1_IRQHandler
.thumb_set SDMMC1_IRQHandler,Default_Handler
.weak TIM5_IRQHandler
.thumb_set TIM5_IRQHandler,Default_Handler
.weak SPI3_IRQHandler
.thumb_set SPI3_IRQHandler,Default_Handler
.weak UART4_IRQHandler
.thumb_set UART4_IRQHandler,Default_Handler
.weak UART5_IRQHandler
.thumb_set UART5_IRQHandler,Default_Handler
.weak TIM6_DAC_IRQHandler
.thumb_set TIM6_DAC_IRQHandler,Default_Handler
.weak TIM7_IRQHandler
.thumb_set TIM7_IRQHandler,Default_Handler
.weak DMA2_Channel1_IRQHandler
.thumb_set DMA2_Channel1_IRQHandler,Default_Handler
.weak DMA2_Channel2_IRQHandler
.thumb_set DMA2_Channel2_IRQHandler,Default_Handler
.weak DMA2_Channel3_IRQHandler
.thumb_set DMA2_Channel3_IRQHandler,Default_Handler
.weak DMA2_Channel4_IRQHandler
.thumb_set DMA2_Channel4_IRQHandler,Default_Handler
.weak DMA2_Channel5_IRQHandler
.thumb_set DMA2_Channel5_IRQHandler,Default_Handler
.weak DFSDM1_FLT0_IRQHandler
.thumb_set DFSDM1_FLT0_IRQHandler,Default_Handler
.weak DFSDM1_FLT1_IRQHandler
.thumb_set DFSDM1_FLT1_IRQHandler,Default_Handler
.weak DFSDM1_FLT2_IRQHandler
.thumb_set DFSDM1_FLT2_IRQHandler,Default_Handler
.weak COMP_IRQHandler
.thumb_set COMP_IRQHandler,Default_Handler
.weak LPTIM1_IRQHandler
.thumb_set LPTIM1_IRQHandler,Default_Handler
.weak LPTIM2_IRQHandler
.thumb_set LPTIM2_IRQHandler,Default_Handler
.weak OTG_FS_IRQHandler
.thumb_set OTG_FS_IRQHandler,Default_Handler
.weak DMA2_Channel6_IRQHandler
.thumb_set DMA2_Channel6_IRQHandler,Default_Handler
.weak DMA2_Channel7_IRQHandler
.thumb_set DMA2_Channel7_IRQHandler,Default_Handler
.weak LPUART1_IRQHandler
.thumb_set LPUART1_IRQHandler,Default_Handler
.weak QUADSPI_IRQHandler
.thumb_set QUADSPI_IRQHandler,Default_Handler
.weak I2C3_EV_IRQHandler
.thumb_set I2C3_EV_IRQHandler,Default_Handler
.weak I2C3_ER_IRQHandler
.thumb_set I2C3_ER_IRQHandler,Default_Handler
.weak SAI1_IRQHandler
.thumb_set SAI1_IRQHandler,Default_Handler
.weak SAI2_IRQHandler
.thumb_set SAI2_IRQHandler,Default_Handler
.weak SWPMI1_IRQHandler
.thumb_set SWPMI1_IRQHandler,Default_Handler
.weak TSC_IRQHandler
.thumb_set TSC_IRQHandler,Default_Handler
.weak LCD_IRQHandler
.thumb_set LCD_IRQHandler,Default_Handler
.weak RNG_IRQHandler
.thumb_set RNG_IRQHandler,Default_Handler
.weak FPU_IRQHandler
.thumb_set FPU_IRQHandler,Default_Handler
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

@ -0,0 +1,43 @@
#include <stdint.h>
static uint32_t ticks = 0;
void delay(uint32_t count)
{
uint32_t target = ticks + count;
while (ticks < target);
}
void NMI_Handler(void) {}
void HardFault_Handler(void)
{
while (1);
}
void MemManage_Handler(void)
{
while (1);
}
void BusFault_Handler(void)
{
while (1);
}
void UsageFault_Handler(void)
{
while (1);
}
void SVC_Handler(void) {}
void DebugMon_Handler(void) {}
void PendSV_Handler(void) {}
void SysTick_Handler(void)
{
ticks++;
}

@ -0,0 +1,44 @@
#include "stm32l476xx.h"
/************************* Miscellaneous Configuration ************************/
/*!< Uncomment the following line if you need to relocate your vector Table in
Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/******************************************************************************/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set MSION bit */
RCC->CR |= RCC_CR_MSION;
/* Reset CFGR register */
RCC->CFGR = 0x00000000U;
/* Reset HSEON, CSSON , HSION, and PLLON bits */
RCC->CR &= 0xEAF6FFFFU;
/* Reset PLLCFGR register */
RCC->PLLCFGR = 0x00001000U;
/* Reset HSEBYP bit */
RCC->CR &= 0xFFFBFFFFU;
/* Disable all interrupts */
RCC->CIER = 0x00000000U;
/* Configure the Vector Table location add offset address ------------------*/
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}
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