158 lines
4.2 KiB
C++
158 lines
4.2 KiB
C++
/****************************************************************************
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* Copyright (c) 2014 by Michael Blandford. All rights reserved.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of its contributors may
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* be 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
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* THE 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 LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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****************************************************************************
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* Other Authors:
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* - Andre Bernet
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* - Bertrand Songis
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* - Bryan J. Rentoul (Gruvin)
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* - Cameron Weeks
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* - Erez Raviv
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* - Jean-Pierre Parisy
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* - Karl Szmutny
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* - Michal Hlavinka
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* - Pat Mackenzie
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* - Philip Moss
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* - Rob Thomson
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* - Romolo Manfredini
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* - Thomas Husterer
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*
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****************************************************************************/
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#if !defined(SIMU)
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#include <stdint.h>
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#if defined(PCBSKY9X)
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#include "AT91SAM3S4.h"
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#elif defined(PCBTARANIS)
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#include "stm32f2xx.h"
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#include "stm32f2xx_gpio.h"
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#endif
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#if defined(PCBTARANIS)
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void bwdt_reset()
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{
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IWDG->KR = 0xAAAA; // reload
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}
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#endif
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#if defined(PCBTARANIS)
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// TODO needed?
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__attribute__ ((section(".bootrodata"), used))
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void _bootStart(void);
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#endif
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#if defined(PCBTARANIS)
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__attribute__ ((section(".isr_boot_vector"), used))
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const uint32_t BootVectors[] = {
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(uint32_t) &_estack,
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(uint32_t) (void (*)(void)) ((unsigned long) &_bootStart) };
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#endif
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#if defined(PCBTARANIS)
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__attribute__ ((section(".bootrodata.*"), used))
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#elif defined(PCBSKY9X)
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__attribute__ ((section(".bootrodata"), used))
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#endif
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const uint8_t BootCode[] = {
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#include "bootloader.lbm"
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};
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#if defined(PCBTARANIS)
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__attribute__ ((section(".bootrodata"), used))
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void _bootStart()
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{
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RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN; // Enable portC clock
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RCC->AHB1ENR |= RCC_AHB1ENR_GPIOEEN; // Enable portE clock
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GPIOC->PUPDR = 0x00000004;
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GPIOE->PUPDR = 0x00000040;
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uint32_t i;
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for (i = 0; i < 50000; i += 1) {
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bwdt_reset();
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}
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if ((GPIOE->IDR & 0x00000008) == 0) {
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if ((GPIOC->IDR & 0x00000002) == 0) {
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// Bootloader needed
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const uint8_t *src;
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uint8_t *dest;
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uint32_t size;
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bwdt_reset();
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size = sizeof(BootCode);
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src = BootCode;
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dest = (uint8_t *) 0x20000000;
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for (; size; size -= 1) {
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*dest++ = *src++;
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}
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// Could check for a valid copy to RAM here
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// Go execute bootloader
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bwdt_reset();
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uint32_t address = *(uint32_t *) 0x20000004;
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((void (*)(void)) (address))(); // Go execute the loaded application
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}
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}
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// run_application() ;
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asm(" mov.w r1, #134217728");
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// 0x8000000
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asm(" add.w r1, #32768");
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// 0x8000
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asm(" movw r0, #60680");
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// 0xED08
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asm(" movt r0, #57344");
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// 0xE000
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asm(" str r1, [r0, #0]");
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// Set the VTOR
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asm("ldr r0, [r1, #0]");
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// Stack pointer value
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asm("msr msp, r0");
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// Set it
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asm("ldr r0, [r1, #4]");
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// Reset address
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asm("mov.w r1, #1");
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asm("orr r0, r1");
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// Set lsbit
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asm("bx r0");
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// Execute application
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}
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#endif
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#endif
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