mirror of https://github.com/ArduPilot/ardupilot
914 lines
25 KiB
C++
914 lines
25 KiB
C++
/*
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ArduPilot bootloader protocol
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based on bl.c from https://github.com/PX4/Bootloader.
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Ported to ChibiOS for ArduPilot by Andrew Tridgell
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*/
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/****************************************************************************
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*
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* Copyright (c) 2012-2014 PX4 Development Team. 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
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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 PX4 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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#include <AP_HAL/AP_HAL.h>
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#include <AP_Math/AP_Math.h>
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#include <AP_Math/crc.h>
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#include "ch.h"
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#include "hal.h"
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#include "hwdef.h"
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#include "bl_protocol.h"
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#include "support.h"
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#include "can.h"
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#include <AP_HAL_ChibiOS/hwdef/common/watchdog.h>
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// #pragma GCC optimize("O0")
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// bootloader flash update protocol.
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//
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// Command format:
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//
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// <opcode>[<command_data>]<EOC>
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//
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// Reply format:
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//
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// [<reply_data>]<INSYNC><status>
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//
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// The <opcode> and <status> values come from the PROTO_ defines below,
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// the <*_data> fields is described only for opcodes that transfer data;
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// in all other cases the field is omitted.
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//
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// Expected workflow (protocol 3) is:
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//
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// GET_SYNC verify that the board is present
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// GET_DEVICE determine which board (select firmware to upload)
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// CHIP_ERASE erase the program area and reset address counter
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// loop:
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// PROG_MULTI program bytes
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// GET_CRC verify CRC of entire flashable area
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// RESET finalise flash programming, reset chip and starts application
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//
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#define BL_PROTOCOL_VERSION 5 // The revision of the bootloader protocol
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// protocol bytes
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#define PROTO_INSYNC 0x12 // 'in sync' byte sent before status
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#define PROTO_EOC 0x20 // end of command
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// Reply bytes
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#define PROTO_OK 0x10 // INSYNC/OK - 'ok' response
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#define PROTO_FAILED 0x11 // INSYNC/FAILED - 'fail' response
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#define PROTO_INVALID 0x13 // INSYNC/INVALID - 'invalid' response for bad commands
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#define PROTO_BAD_SILICON_REV 0x14 // On the F4 series there is an issue with < Rev 3 silicon
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// see https://pixhawk.org/help/errata
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// Command bytes
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#define PROTO_GET_SYNC 0x21 // NOP for re-establishing sync
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#define PROTO_GET_DEVICE 0x22 // get device ID bytes
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#define PROTO_CHIP_ERASE 0x23 // erase program area and reset program address
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#define PROTO_PROG_MULTI 0x27 // write bytes at program address and increment
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#define PROTO_READ_MULTI 0x28 // read bytes at address and increment
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#define PROTO_GET_CRC 0x29 // compute & return a CRC
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#define PROTO_GET_OTP 0x2a // read a byte from OTP at the given address
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#define PROTO_GET_SN 0x2b // read a word from UDID area ( Serial) at the given address
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#define PROTO_GET_CHIP 0x2c // read chip version (MCU IDCODE)
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#define PROTO_SET_DELAY 0x2d // set minimum boot delay
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#define PROTO_GET_CHIP_DES 0x2e // read chip version In ASCII
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#define PROTO_BOOT 0x30 // boot the application
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#define PROTO_DEBUG 0x31 // emit debug information - format not defined
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#define PROTO_SET_BAUD 0x33 // baud rate on uart
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#define PROTO_PROG_MULTI_MAX 64 // maximum PROG_MULTI size
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#define PROTO_READ_MULTI_MAX 255 // size of the size field
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/* argument values for PROTO_GET_DEVICE */
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#define PROTO_DEVICE_BL_REV 1 // bootloader revision
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#define PROTO_DEVICE_BOARD_ID 2 // board ID
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#define PROTO_DEVICE_BOARD_REV 3 // board revision
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#define PROTO_DEVICE_FW_SIZE 4 // size of flashable area
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#define PROTO_DEVICE_VEC_AREA 5 // contents of reserved vectors 7-10
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// interrupt vector table for STM32
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#define SCB_VTOR 0xE000ED08
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static virtual_timer_t systick_vt;
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/*
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millisecond timer array
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*/
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#define NTIMERS 2
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#define TIMER_BL_WAIT 0
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#define TIMER_LED 1
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static enum led_state {LED_BLINK, LED_ON, LED_OFF} led_state;
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volatile unsigned timer[NTIMERS];
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// keep back 32 bytes at the front of flash. This is long enough to allow for aligned
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// access on STM32H7
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#define RESERVE_LEAD_WORDS 8
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/*
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1ms timer tick callback
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*/
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static void sys_tick_handler(void *ctx)
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{
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chSysLockFromISR();
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chVTSetI(&systick_vt, chTimeMS2I(1), sys_tick_handler, nullptr);
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chSysUnlockFromISR();
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uint8_t i;
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for (i = 0; i < NTIMERS; i++)
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if (timer[i] > 0) {
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timer[i]--;
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}
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if ((led_state == LED_BLINK) && (timer[TIMER_LED] == 0)) {
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led_toggle(LED_BOOTLOADER);
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timer[TIMER_LED] = 50;
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}
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}
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static void delay(unsigned msec)
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{
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chThdSleep(chTimeMS2I(msec));
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}
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static void
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led_set(enum led_state state)
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{
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led_state = state;
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switch (state) {
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case LED_OFF:
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led_off(LED_BOOTLOADER);
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break;
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case LED_ON:
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led_on(LED_BOOTLOADER);
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break;
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case LED_BLINK:
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/* restart the blink state machine ASAP */
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timer[TIMER_LED] = 0;
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break;
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}
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}
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static void
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do_jump(uint32_t stacktop, uint32_t entrypoint)
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{
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#if defined(STM32F7) || defined(STM32H7)
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// disable caches on F7 before starting program
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__DSB();
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__ISB();
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SCB_DisableDCache();
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SCB_DisableICache();
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#endif
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chSysLock();
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// we set sp as well as msp to avoid an issue with loading NuttX
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asm volatile(
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"mov sp, %0 \n"
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"msr msp, %0 \n"
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"bx %1 \n"
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: : "r"(stacktop), "r"(entrypoint) :);
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}
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#define APP_START_ADDRESS (FLASH_LOAD_ADDRESS + (FLASH_BOOTLOADER_LOAD_KB + APP_START_OFFSET_KB)*1024U)
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void
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jump_to_app()
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{
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const uint32_t *app_base = (const uint32_t *)(APP_START_ADDRESS);
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/*
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* We hold back the programming of the lead words until the upload
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* is marked complete by the host. So if they are not 0xffffffff,
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* we should try booting it.
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*/
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for (uint8_t i=0; i<RESERVE_LEAD_WORDS; i++) {
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if (app_base[i] == 0xffffffff) {
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return;
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}
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}
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/*
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* The second word of the app is the entrypoint; it must point within the
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* flash area (or we have a bad flash).
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*/
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if (app_base[1] < APP_START_ADDRESS) {
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return;
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}
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if (app_base[1] >= (APP_START_ADDRESS + board_info.fw_size)) {
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return;
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}
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#if HAL_USE_CAN == TRUE || HAL_NUM_CAN_IFACES
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// for CAN firmware we start the watchdog before we run the
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// application code, to ensure we catch a bad firmare. If we get a
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// watchdog reset and the firmware hasn't changed the RTC flag to
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// indicate that it has been running OK for 30s then we will stay
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// in bootloader
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stm32_watchdog_init();
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stm32_watchdog_pat();
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#endif
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flash_set_keep_unlocked(false);
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led_set(LED_OFF);
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// resetting the clocks is needed for loading NuttX
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#if defined(STM32H7)
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rccDisableAPB1L(~0);
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rccDisableAPB1H(~0);
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#elif defined(STM32G4)
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rccDisableAPB1R1(~0);
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rccDisableAPB1R2(~0);
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#else
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rccDisableAPB1(~0);
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#endif
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rccDisableAPB2(~0);
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#if HAL_USE_SERIAL_USB == TRUE
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rccResetOTG_FS();
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rccResetOTG_HS();
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#endif
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// disable all interrupt sources
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port_disable();
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/* switch exception handlers to the application */
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*(volatile uint32_t *)SCB_VTOR = APP_START_ADDRESS;
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/* extract the stack and entrypoint from the app vector table and go */
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do_jump(app_base[0], app_base[1]);
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}
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static void
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sync_response(void)
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{
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uint8_t data[] = {
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PROTO_INSYNC, // "in sync"
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PROTO_OK // "OK"
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};
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cout(data, sizeof(data));
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}
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static void
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invalid_response(void)
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{
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uint8_t data[] = {
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PROTO_INSYNC, // "in sync"
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PROTO_INVALID // "invalid command"
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};
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cout(data, sizeof(data));
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}
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static void
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failure_response(void)
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{
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uint8_t data[] = {
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PROTO_INSYNC, // "in sync"
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PROTO_FAILED // "command failed"
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};
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cout(data, sizeof(data));
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}
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/**
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* Function to wait for EOC
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*
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* @param timeout length of time in ms to wait for the EOC to be received
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* @return true if the EOC is returned within the timeout perio, else false
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*/
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inline static bool
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wait_for_eoc(unsigned timeout)
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{
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return cin(timeout) == PROTO_EOC;
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}
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static void
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cout_word(uint32_t val)
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{
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cout((uint8_t *)&val, 4);
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}
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#define TEST_FLASH 0
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#if TEST_FLASH
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static void test_flash()
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{
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uint32_t loop = 1;
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bool init_done = false;
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while (true) {
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uint32_t addr = 0;
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uint32_t page = 0;
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while (true) {
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uint32_t v[8];
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for (uint8_t i=0; i<8; i++) {
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v[i] = (page<<16) + loop;
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}
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if (flash_func_sector_size(page) == 0) {
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continue;
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}
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uint32_t num_writes = flash_func_sector_size(page) / sizeof(v);
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uprintf("page %u size %u addr=0x%08x v=0x%08x\n",
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page, flash_func_sector_size(page), addr, v[0]); delay(10);
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if (init_done) {
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for (uint32_t j=0; j<flash_func_sector_size(page)/4; j++) {
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uint32_t v1 = (page<<16) + (loop-1);
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uint32_t v2 = flash_func_read_word(addr+j*4);
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if (v2 != v1) {
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uprintf("read error at 0x%08x v=0x%08x v2=0x%08x\n", addr+j*4, v1, v2);
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break;
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}
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}
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}
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if (!flash_func_erase_sector(page)) {
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uprintf("erase of %u failed\n", page);
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}
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for (uint32_t j=0; j<num_writes; j++) {
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if (!flash_func_write_words(addr+j*sizeof(v), v, ARRAY_SIZE(v))) {
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uprintf("write failed at 0x%08x\n", addr+j*sizeof(v));
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break;
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}
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}
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addr += flash_func_sector_size(page);
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page++;
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if (flash_func_sector_size(page) == 0) {
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break;
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}
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}
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init_done = true;
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delay(1000);
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loop++;
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}
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}
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#endif
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void
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bootloader(unsigned timeout)
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{
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#if TEST_FLASH
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test_flash();
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#endif
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uint32_t address = board_info.fw_size; /* force erase before upload will work */
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uint32_t read_address = 0;
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uint32_t first_words[RESERVE_LEAD_WORDS];
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bool done_sync = false;
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bool done_get_device = false;
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bool done_erase = false;
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static bool done_timer_init;
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unsigned original_timeout = timeout;
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memset(first_words, 0xFF, sizeof(first_words));
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if (!done_timer_init) {
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done_timer_init = true;
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chVTObjectInit(&systick_vt);
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chVTSet(&systick_vt, chTimeMS2I(1), sys_tick_handler, nullptr);
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}
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/* if we are working with a timeout, start it running */
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if (timeout) {
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timer[TIMER_BL_WAIT] = timeout;
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}
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/* make the LED blink while we are idle */
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led_set(LED_BLINK);
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while (true) {
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volatile int c;
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int arg;
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static union {
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uint8_t c[256];
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uint32_t w[64];
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} flash_buffer;
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// Wait for a command byte
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led_off(LED_ACTIVITY);
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do {
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/* if we have a timeout and the timer has expired, return now */
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if (timeout && !timer[TIMER_BL_WAIT]) {
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return;
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}
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|
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/* try to get a byte from the host */
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c = cin(0);
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#if HAL_USE_CAN == TRUE || HAL_NUM_CAN_IFACES
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if (c < 0) {
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can_update();
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}
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#endif
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} while (c < 0);
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|
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led_on(LED_ACTIVITY);
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// handle the command byte
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switch (c) {
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// sync
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//
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// command: GET_SYNC/EOC
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// reply: INSYNC/OK
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//
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case PROTO_GET_SYNC:
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/* expect EOC */
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if (!wait_for_eoc(2)) {
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goto cmd_bad;
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}
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done_sync = true;
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break;
|
|
|
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// get device info
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//
|
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// command: GET_DEVICE/<arg:1>/EOC
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// BL_REV reply: <revision:4>/INSYNC/EOC
|
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// BOARD_ID reply: <board type:4>/INSYNC/EOC
|
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// BOARD_REV reply: <board rev:4>/INSYNC/EOC
|
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// FW_SIZE reply: <firmware size:4>/INSYNC/EOC
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// VEC_AREA reply <vectors 7-10:16>/INSYNC/EOC
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// bad arg reply: INSYNC/INVALID
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//
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case PROTO_GET_DEVICE:
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/* expect arg then EOC */
|
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arg = cin(1000);
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if (arg < 0) {
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goto cmd_bad;
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}
|
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|
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if (!wait_for_eoc(2)) {
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goto cmd_bad;
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}
|
|
|
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// reset read pointer
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read_address = 0;
|
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|
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switch (arg) {
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case PROTO_DEVICE_BL_REV: {
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uint32_t bl_proto_rev = BL_PROTOCOL_VERSION;
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cout((uint8_t *)&bl_proto_rev, sizeof(bl_proto_rev));
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break;
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}
|
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|
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case PROTO_DEVICE_BOARD_ID:
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cout((uint8_t *)&board_info.board_type, sizeof(board_info.board_type));
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break;
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case PROTO_DEVICE_BOARD_REV:
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cout((uint8_t *)&board_info.board_rev, sizeof(board_info.board_rev));
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break;
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case PROTO_DEVICE_FW_SIZE:
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cout((uint8_t *)&board_info.fw_size, sizeof(board_info.fw_size));
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break;
|
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case PROTO_DEVICE_VEC_AREA:
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for (unsigned p = 7; p <= 10; p++) {
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uint32_t bytes = flash_func_read_word(p * 4);
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|
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cout((uint8_t *)&bytes, sizeof(bytes));
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}
|
|
|
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break;
|
|
|
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default:
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goto cmd_bad;
|
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}
|
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done_get_device = true;
|
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break;
|
|
|
|
// erase and prepare for programming
|
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//
|
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// command: ERASE/EOC
|
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// success reply: INSYNC/OK
|
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// erase failure: INSYNC/FAILURE
|
|
//
|
|
case PROTO_CHIP_ERASE:
|
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|
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if (!done_sync || !done_get_device) {
|
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// lower chance of random data on a uart triggering erase
|
|
goto cmd_bad;
|
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}
|
|
|
|
/* expect EOC */
|
|
if (!wait_for_eoc(2)) {
|
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goto cmd_bad;
|
|
}
|
|
|
|
// once erase is done there is no going back, set timeout
|
|
// to zero
|
|
done_erase = true;
|
|
timeout = 0;
|
|
|
|
flash_set_keep_unlocked(true);
|
|
|
|
// clear the bootloader LED while erasing - it stops blinking at random
|
|
// and that's confusing
|
|
led_set(LED_OFF);
|
|
|
|
// erase all sectors
|
|
for (uint8_t i = 0; flash_func_sector_size(i) != 0; i++) {
|
|
if (!flash_func_erase_sector(i)) {
|
|
goto cmd_fail;
|
|
}
|
|
}
|
|
|
|
// enable the LED while verifying the erase
|
|
led_set(LED_ON);
|
|
|
|
// verify the erase
|
|
for (address = 0; address < board_info.fw_size; address += 4) {
|
|
if (flash_func_read_word(address) != 0xffffffff) {
|
|
goto cmd_fail;
|
|
}
|
|
}
|
|
|
|
address = 0;
|
|
|
|
// resume blinking
|
|
led_set(LED_BLINK);
|
|
break;
|
|
|
|
// program bytes at current address
|
|
//
|
|
// command: PROG_MULTI/<len:1>/<data:len>/EOC
|
|
// success reply: INSYNC/OK
|
|
// invalid reply: INSYNC/INVALID
|
|
// readback failure: INSYNC/FAILURE
|
|
//
|
|
case PROTO_PROG_MULTI: // program bytes
|
|
if (!done_sync || !done_get_device) {
|
|
// lower chance of random data on a uart triggering erase
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// expect count
|
|
led_set(LED_OFF);
|
|
|
|
arg = cin(50);
|
|
|
|
if (arg < 0) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// sanity-check arguments
|
|
if (arg % 4) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
if ((address + arg) > board_info.fw_size) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
if (arg > sizeof(flash_buffer.c)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
for (int i = 0; i < arg; i++) {
|
|
c = cin(1000);
|
|
|
|
if (c < 0) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
flash_buffer.c[i] = c;
|
|
}
|
|
|
|
if (!wait_for_eoc(200)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// save the first words and don't program it until everything else is done
|
|
if (address < sizeof(first_words)) {
|
|
uint8_t n = MIN(sizeof(first_words)-address, arg);
|
|
memcpy(&first_words[address/4], &flash_buffer.w[0], n);
|
|
// replace first words with 1 bits we can overwrite later
|
|
memset(&flash_buffer.w[0], 0xFF, n);
|
|
}
|
|
|
|
arg /= 4;
|
|
// program the words
|
|
if (!flash_write_buffer(address, flash_buffer.w, arg)) {
|
|
goto cmd_fail;
|
|
}
|
|
address += arg * 4;
|
|
break;
|
|
|
|
// fetch CRC of the entire flash area
|
|
//
|
|
// command: GET_CRC/EOC
|
|
// reply: <crc:4>/INSYNC/OK
|
|
//
|
|
case PROTO_GET_CRC: {
|
|
// expect EOC
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
if (!flash_write_flush()) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// compute CRC of the programmed area
|
|
uint32_t sum = 0;
|
|
|
|
for (unsigned p = 0; p < board_info.fw_size; p += 4) {
|
|
uint32_t bytes;
|
|
|
|
if (p < sizeof(first_words) && first_words[0] != 0xFFFFFFFF) {
|
|
bytes = first_words[p/4];
|
|
} else {
|
|
bytes = flash_func_read_word(p);
|
|
}
|
|
sum = crc32_small(sum, (uint8_t *)&bytes, sizeof(bytes));
|
|
}
|
|
|
|
cout_word(sum);
|
|
break;
|
|
}
|
|
|
|
// read a word from the OTP
|
|
//
|
|
// command: GET_OTP/<addr:4>/EOC
|
|
// reply: <value:4>/INSYNC/OK
|
|
case PROTO_GET_OTP:
|
|
// expect argument
|
|
{
|
|
uint32_t index = 0;
|
|
|
|
if (cin_word(&index, 100)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// expect EOC
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
cout_word(flash_func_read_otp(index));
|
|
}
|
|
break;
|
|
|
|
// read the SN from the UDID
|
|
//
|
|
// command: GET_SN/<addr:4>/EOC
|
|
// reply: <value:4>/INSYNC/OK
|
|
case PROTO_GET_SN:
|
|
// expect argument
|
|
{
|
|
uint32_t index = 0;
|
|
|
|
if (cin_word(&index, 100)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// expect EOC
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
cout_word(flash_func_read_sn(index));
|
|
}
|
|
break;
|
|
|
|
// read the chip ID code
|
|
//
|
|
// command: GET_CHIP/EOC
|
|
// reply: <value:4>/INSYNC/OK
|
|
case PROTO_GET_CHIP: {
|
|
// expect EOC
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
cout_word(get_mcu_id());
|
|
}
|
|
break;
|
|
|
|
// read the chip description
|
|
//
|
|
// command: GET_CHIP_DES/EOC
|
|
// reply: <value:4>/INSYNC/OK
|
|
case PROTO_GET_CHIP_DES: {
|
|
uint8_t buffer[MAX_DES_LENGTH];
|
|
unsigned len = MAX_DES_LENGTH;
|
|
|
|
// expect EOC
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
len = get_mcu_desc(len, buffer);
|
|
cout_word(len);
|
|
cout(buffer, len);
|
|
}
|
|
break;
|
|
|
|
#ifdef BOOT_DELAY_ADDRESS
|
|
|
|
case PROTO_SET_DELAY: {
|
|
/*
|
|
Allow for the bootloader to setup a
|
|
boot delay signature which tells the
|
|
board to delay for at least a
|
|
specified number of seconds on boot.
|
|
*/
|
|
int v = cin(100);
|
|
|
|
if (v < 0) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
uint8_t boot_delay = v & 0xFF;
|
|
|
|
if (boot_delay > BOOT_DELAY_MAX) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// expect EOC
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
uint32_t sig1 = flash_func_read_word(BOOT_DELAY_ADDRESS);
|
|
uint32_t sig2 = flash_func_read_word(BOOT_DELAY_ADDRESS + 4);
|
|
|
|
if (sig1 != BOOT_DELAY_SIGNATURE1 ||
|
|
sig2 != BOOT_DELAY_SIGNATURE2) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
uint32_t value = (BOOT_DELAY_SIGNATURE1 & 0xFFFFFF00) | boot_delay;
|
|
flash_func_write_word(BOOT_DELAY_ADDRESS, value);
|
|
|
|
if (flash_func_read_word(BOOT_DELAY_ADDRESS) != value) {
|
|
goto cmd_fail;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
case PROTO_READ_MULTI: {
|
|
arg = cin(50);
|
|
if (arg < 0) {
|
|
goto cmd_bad;
|
|
}
|
|
if (arg % 4) {
|
|
goto cmd_bad;
|
|
}
|
|
if ((read_address + arg) > board_info.fw_size) {
|
|
goto cmd_bad;
|
|
}
|
|
// expect EOC
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
arg /= 4;
|
|
|
|
while (arg-- > 0) {
|
|
cout_word(flash_func_read_word(read_address));
|
|
read_address += 4;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// finalise programming and boot the system
|
|
//
|
|
// command: BOOT/EOC
|
|
// reply: INSYNC/OK
|
|
//
|
|
case PROTO_BOOT:
|
|
|
|
// expect EOC
|
|
if (!wait_for_eoc(1000)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
if (!flash_write_flush()) {
|
|
goto cmd_fail;
|
|
}
|
|
|
|
// program the deferred first word
|
|
if (first_words[0] != 0xffffffff) {
|
|
if (!flash_write_buffer(0, first_words, RESERVE_LEAD_WORDS)) {
|
|
goto cmd_fail;
|
|
}
|
|
// revert in case the flash was bad...
|
|
memset(first_words, 0xff, sizeof(first_words));
|
|
}
|
|
|
|
// send a sync and wait for it to be collected
|
|
sync_response();
|
|
delay(100);
|
|
|
|
// quiesce and jump to the app
|
|
return;
|
|
|
|
case PROTO_DEBUG:
|
|
// XXX reserved for ad-hoc debugging as required
|
|
break;
|
|
|
|
case PROTO_SET_BAUD: {
|
|
if (!done_sync || !done_get_device) {
|
|
// prevent timeout going to zero on noise
|
|
goto cmd_bad;
|
|
}
|
|
/* expect arg then EOC */
|
|
uint32_t baud = 0;
|
|
|
|
if (cin_word(&baud, 100)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
// send the sync response for this command
|
|
sync_response();
|
|
|
|
delay(5);
|
|
|
|
// set the baudrate
|
|
port_setbaud(baud);
|
|
|
|
lock_bl_port();
|
|
timeout = 0;
|
|
|
|
// this is different to what every other case in this
|
|
// switch does! Most go through sync_response down the
|
|
// bottom, but we need to undertake an action after
|
|
// returning the response...
|
|
continue;
|
|
}
|
|
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
// we got a good command on this port, lock to the port
|
|
lock_bl_port();
|
|
|
|
// once we get both a valid sync and valid get_device then kill
|
|
// the timeout
|
|
if (done_sync && done_get_device) {
|
|
timeout = 0;
|
|
}
|
|
|
|
// send the sync response for this command
|
|
sync_response();
|
|
continue;
|
|
cmd_bad:
|
|
// if we get a bad command it could be line noise on a
|
|
// uart. Set timeout back to original timeout so we don't get
|
|
// stuck in the bootloader
|
|
if (!done_erase) {
|
|
timeout = original_timeout;
|
|
}
|
|
// send an 'invalid' response but don't kill the timeout - could be garbage
|
|
invalid_response();
|
|
continue;
|
|
|
|
cmd_fail:
|
|
// send a 'command failed' response but don't kill the timeout - could be garbage
|
|
failure_response();
|
|
continue;
|
|
}
|
|
}
|