stm32l4: add support for booting into DFU mode
This commit is contained in:
Matias Nitsche
Alan Carvalho de Assis
parent
b83b83bf51
commit
b4bea95a6a
@ -100,6 +100,7 @@ CHIP_CSRCS += stm32l4_irq.c stm32l4_lowputc.c stm32l4_rcc.c
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CHIP_CSRCS += stm32l4_serial.c stm32l4_start.c stm32l4_waste.c stm32l4_uid.c
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CHIP_CSRCS += stm32l4_spi.c stm32l4_i2c.c stm32l4_lse.c stm32l4_lsi.c
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CHIP_CSRCS += stm32l4_pwr.c stm32l4_tim.c stm32l4_flash.c
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CHIP_CSRCS += stm32l4_dfumode.c
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ifneq ($(CONFIG_ARCH_IDLE_CUSTOM),y)
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CHIP_CSRCS += stm32l4_idle.c
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168
arch/arm/src/stm32l4/stm32l4_dfumode.c
Normal file
168
arch/arm/src/stm32l4/stm32l4_dfumode.c
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@ -0,0 +1,168 @@
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/****************************************************************************
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* arch/arm/src/stm32/stm32l4_dfumode.c
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*
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* Copyright (C) 2019 Bill Gatliff. All rights reserved.
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Bill Gatliff <bgat@billgatliff.com>
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* Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <unistd.h>
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#include <debug.h>
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#include <nuttx/signal.h>
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#include "stm32l4_rcc.h"
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#include "hardware/stm32l4_syscfg.h"
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#include "stm32l4_dfumode.h"
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static inline void rcc_reset(void)
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{
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uint32_t regval;
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regval = getreg32(STM32L4_RCC_CR);
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regval |= RCC_CR_MSION;
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putreg32(regval, STM32L4_RCC_CR);
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while (!(getreg32(STM32L4_RCC_CR) & RCC_CR_MSIRDY));
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/* Set MSI to 4MHz */
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regval = getreg32(STM32L4_RCC_CR);
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regval &= ~RCC_CR_MSIRANGE_MASK;
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regval |= RCC_CR_MSIRANGE_4M | RCC_CR_MSIRGSEL;
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putreg32(regval, STM32L4_RCC_CR);
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/* Reset CFGR register */
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putreg32(0x00000000, STM32L4_RCC_CFGR);
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/* Reset HSION, HSEON, CSSON and PLLON bits */
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regval = getreg32(STM32L4_RCC_CR);
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regval &= ~(RCC_CR_HSION | RCC_CR_HSIKERON | RCC_CR_HSEON | RCC_CR_HSIASFS |
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RCC_CR_CSSON | RCC_CR_PLLON | RCC_CR_PLLON | RCC_CR_PLLSAI1ON |
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RCC_CR_PLLSAI2ON);
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putreg32(regval, STM32L4_RCC_CR);
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/* Reset PLLCFGR register to reset default */
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putreg32(RCC_PLLCFG_RESET, STM32L4_RCC_PLLCFG);
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putreg32(0, STM32L4_RCC_PLLSAI1CFG);
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putreg32(RCC_PLLSAI1CFG_PLLN(16), STM32L4_RCC_PLLSAI1CFG);
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putreg32(0, STM32L4_RCC_PLLSAI2CFG);
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putreg32(RCC_PLLSAI2CFG_PLLN(16), STM32L4_RCC_PLLSAI1CFG);
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/* Reset HSEBYP bit */
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regval = getreg32(STM32L4_RCC_CR);
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regval &= ~RCC_CR_HSEBYP;
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putreg32(regval, STM32L4_RCC_CR);
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/* Disable all interrupts */
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putreg32(0x00000000, STM32L4_RCC_CIER);
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}
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static inline void apb_reset(void)
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{
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putreg32(0xffffffff, STM32L4_RCC_APB1RSTR1);
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putreg32(0xffffffff, STM32L4_RCC_APB1RSTR2);
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putreg32(0xffffffff, STM32L4_RCC_APB2RSTR);
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putreg32(0xffffffff, STM32L4_RCC_AHB1RSTR);
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putreg32(0xffffffff, STM32L4_RCC_AHB2RSTR);
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putreg32(0xffffffff, STM32L4_RCC_AHB3RSTR);
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putreg32(0, STM32L4_RCC_APB1RSTR1);
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putreg32(0, STM32L4_RCC_APB1RSTR2);
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putreg32(0, STM32L4_RCC_APB2RSTR);
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putreg32(0, STM32L4_RCC_AHB1RSTR);
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putreg32(0, STM32L4_RCC_AHB2RSTR);
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putreg32(0, STM32L4_RCC_AHB3RSTR);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32l4_dfumode
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*
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* Description:
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* Reboot the part in DFU mode (GCC only).
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*
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****************************************************************************/
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#if defined(CONFIG_STM32L4_STM32L4X6)
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void stm32l4_dfumode(void)
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{
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uint32_t regval;
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void (*SysMemBootJump)(void);
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#ifdef CONFIG_DEBUG_WARN
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_warn("Entering DFU mode...\n");
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#endif
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/* disable all peripherals, interrupts and switch to HSI */
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rcc_reset();
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apb_reset();
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/* remap ROM at address zero */
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regval = getreg32(STM32L4_RCC_APB2ENR);
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regval |= RCC_APB2ENR_SYSCFGEN;
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putreg32(regval, STM32L4_RCC_APB2ENR);
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putreg32(SYSCFG_MEMRMP_SYSTEM, STM32L4_SYSCFG_MEMRMP);
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/* set stack pointer and program-counter to ROM values */
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asm("dsb\n\t"
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"isb\n\t"
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"ldr r0, =0x1fff0000\n\t" /* ROM base */
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"ldr sp,[r0, #0]\n\t" /* SP @ 0 */
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);
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/* jump into ROM */
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SysMemBootJump = (void (*)(void))(*((uint32_t*)0x1fff0004));
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SysMemBootJump();
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while(1);
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__builtin_unreachable(); /* Tell compiler we will not return */
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}
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#endif
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61
arch/arm/src/stm32l4/stm32l4_dfumode.h
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61
arch/arm/src/stm32l4/stm32l4_dfumode.h
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@ -0,0 +1,61 @@
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/****************************************************************************
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* arch/arm/src/stm32/stm32l4_dfumode.h
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_STM32L4_DFUMODE_H
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#define __ARCH_ARM_SRC_STM32L4_DFUMODE_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/compiler.h>
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: stm32l4_dfumode
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*
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* Description:
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* Reboot the part in DFU mode.
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*
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****************************************************************************/
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#if defined(CONFIG_STM32L4_STM32L4X6)
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void stm32l4_dfumode(void) noreturn_function;
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#endif
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#endif /* __ARCH_ARM_SRC_STM32L4_DFUMODE_H */
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