mirror of https://github.com/ArduPilot/ardupilot
800 lines
21 KiB
C++
800 lines
21 KiB
C++
/*
|
|
ArduPilot bootloader protocol
|
|
|
|
based on bl.c from https://github.com/PX4/Bootloader.
|
|
|
|
Ported to ChibiOS for ArduPilot by Andrew Tridgell
|
|
*/
|
|
|
|
/****************************************************************************
|
|
*
|
|
* Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
|
|
*
|
|
* 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 PX4 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 OWNER 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include <AP_HAL/AP_HAL.h>
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
#include "hwdef.h"
|
|
|
|
#include "bl_protocol.h"
|
|
#include "support.h"
|
|
|
|
|
|
// bootloader flash update protocol.
|
|
//
|
|
// Command format:
|
|
//
|
|
// <opcode>[<command_data>]<EOC>
|
|
//
|
|
// Reply format:
|
|
//
|
|
// [<reply_data>]<INSYNC><status>
|
|
//
|
|
// The <opcode> and <status> values come from the PROTO_ defines below,
|
|
// the <*_data> fields is described only for opcodes that transfer data;
|
|
// in all other cases the field is omitted.
|
|
//
|
|
// Expected workflow (protocol 3) is:
|
|
//
|
|
// GET_SYNC verify that the board is present
|
|
// GET_DEVICE determine which board (select firmware to upload)
|
|
// CHIP_ERASE erase the program area and reset address counter
|
|
// loop:
|
|
// PROG_MULTI program bytes
|
|
// GET_CRC verify CRC of entire flashable area
|
|
// RESET finalise flash programming, reset chip and starts application
|
|
//
|
|
|
|
#define BL_PROTOCOL_VERSION 5 // The revision of the bootloader protocol
|
|
// protocol bytes
|
|
#define PROTO_INSYNC 0x12 // 'in sync' byte sent before status
|
|
#define PROTO_EOC 0x20 // end of command
|
|
|
|
// Reply bytes
|
|
#define PROTO_OK 0x10 // INSYNC/OK - 'ok' response
|
|
#define PROTO_FAILED 0x11 // INSYNC/FAILED - 'fail' response
|
|
#define PROTO_INVALID 0x13 // INSYNC/INVALID - 'invalid' response for bad commands
|
|
#define PROTO_BAD_SILICON_REV 0x14 // On the F4 series there is an issue with < Rev 3 silicon
|
|
// see https://pixhawk.org/help/errata
|
|
// Command bytes
|
|
#define PROTO_GET_SYNC 0x21 // NOP for re-establishing sync
|
|
#define PROTO_GET_DEVICE 0x22 // get device ID bytes
|
|
#define PROTO_CHIP_ERASE 0x23 // erase program area and reset program address
|
|
#define PROTO_PROG_MULTI 0x27 // write bytes at program address and increment
|
|
#define PROTO_GET_CRC 0x29 // compute & return a CRC
|
|
#define PROTO_GET_OTP 0x2a // read a byte from OTP at the given address
|
|
#define PROTO_GET_SN 0x2b // read a word from UDID area ( Serial) at the given address
|
|
#define PROTO_GET_CHIP 0x2c // read chip version (MCU IDCODE)
|
|
#define PROTO_SET_DELAY 0x2d // set minimum boot delay
|
|
#define PROTO_GET_CHIP_DES 0x2e // read chip version In ASCII
|
|
#define PROTO_BOOT 0x30 // boot the application
|
|
#define PROTO_DEBUG 0x31 // emit debug information - format not defined
|
|
#define PROTO_SET_BAUD 0x33 // baud rate on uart
|
|
|
|
#define PROTO_PROG_MULTI_MAX 64 // maximum PROG_MULTI size
|
|
#define PROTO_READ_MULTI_MAX 255 // size of the size field
|
|
|
|
/* argument values for PROTO_GET_DEVICE */
|
|
#define PROTO_DEVICE_BL_REV 1 // bootloader revision
|
|
#define PROTO_DEVICE_BOARD_ID 2 // board ID
|
|
#define PROTO_DEVICE_BOARD_REV 3 // board revision
|
|
#define PROTO_DEVICE_FW_SIZE 4 // size of flashable area
|
|
#define PROTO_DEVICE_VEC_AREA 5 // contents of reserved vectors 7-10
|
|
|
|
// interrupt vector table for STM32
|
|
#define SCB_VTOR 0xE000ED08
|
|
|
|
static virtual_timer_t systick_vt;
|
|
|
|
/*
|
|
millisecond timer array
|
|
*/
|
|
#define NTIMERS 2
|
|
#define TIMER_BL_WAIT 0
|
|
#define TIMER_LED 1
|
|
|
|
static enum led_state {LED_BLINK, LED_ON, LED_OFF} led_state;
|
|
|
|
volatile unsigned timer[NTIMERS];
|
|
|
|
/*
|
|
1ms timer tick callback
|
|
*/
|
|
static void sys_tick_handler(void *ctx)
|
|
{
|
|
chVTSetI(&systick_vt, chTimeMS2I(1), sys_tick_handler, nullptr);
|
|
uint8_t i;
|
|
for (i = 0; i < NTIMERS; i++)
|
|
if (timer[i] > 0) {
|
|
timer[i]--;
|
|
}
|
|
|
|
if ((led_state == LED_BLINK) && (timer[TIMER_LED] == 0)) {
|
|
led_toggle(LED_BOOTLOADER);
|
|
timer[TIMER_LED] = 50;
|
|
}
|
|
}
|
|
|
|
static void delay(unsigned msec)
|
|
{
|
|
chThdSleep(chTimeMS2I(msec));
|
|
}
|
|
|
|
static void
|
|
led_set(enum led_state state)
|
|
{
|
|
led_state = state;
|
|
|
|
switch (state) {
|
|
case LED_OFF:
|
|
led_off(LED_BOOTLOADER);
|
|
break;
|
|
|
|
case LED_ON:
|
|
led_on(LED_BOOTLOADER);
|
|
break;
|
|
|
|
case LED_BLINK:
|
|
/* restart the blink state machine ASAP */
|
|
timer[TIMER_LED] = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_jump(uint32_t stacktop, uint32_t entrypoint)
|
|
{
|
|
#if defined(STM32F7)
|
|
// disable caches on F7 before starting program
|
|
__DSB();
|
|
__ISB();
|
|
SCB_DisableDCache();
|
|
SCB_DisableICache();
|
|
#endif
|
|
|
|
chSysLock();
|
|
|
|
// we set sp as well as msp to avoid an issue with loading NuttX
|
|
asm volatile(
|
|
"mov sp, %0 \n"
|
|
"msr msp, %0 \n"
|
|
"bx %1 \n"
|
|
: : "r"(stacktop), "r"(entrypoint) :);
|
|
}
|
|
|
|
#define APP_START_ADDRESS (FLASH_LOAD_ADDRESS + FLASH_BOOTLOADER_LOAD_KB*1024U)
|
|
|
|
void
|
|
jump_to_app()
|
|
{
|
|
const uint32_t *app_base = (const uint32_t *)(APP_START_ADDRESS);
|
|
|
|
/*
|
|
* We refuse to program the first word of the app until the upload is marked
|
|
* complete by the host. So if it's not 0xffffffff, we should try booting it.
|
|
*/
|
|
if (app_base[0] == 0xffffffff) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* The second word of the app is the entrypoint; it must point within the
|
|
* flash area (or we have a bad flash).
|
|
*/
|
|
if (app_base[1] < APP_START_ADDRESS) {
|
|
return;
|
|
}
|
|
|
|
if (app_base[1] >= (APP_START_ADDRESS + board_info.fw_size)) {
|
|
return;
|
|
}
|
|
|
|
flash_set_keep_unlocked(false);
|
|
|
|
led_set(LED_OFF);
|
|
|
|
// resetting the clocks is needed for loading NuttX
|
|
rccDisableAPB1(~0);
|
|
rccDisableAPB2(~0);
|
|
#if HAL_USE_SERIAL_USB == TRUE
|
|
rccResetOTG_FS();
|
|
rccResetOTG_HS();
|
|
#endif
|
|
|
|
// disable all interrupt sources
|
|
port_disable();
|
|
|
|
/* switch exception handlers to the application */
|
|
*(volatile uint32_t *)SCB_VTOR = APP_START_ADDRESS;
|
|
|
|
/* extract the stack and entrypoint from the app vector table and go */
|
|
do_jump(app_base[0], app_base[1]);
|
|
}
|
|
|
|
static void
|
|
sync_response(void)
|
|
{
|
|
uint8_t data[] = {
|
|
PROTO_INSYNC, // "in sync"
|
|
PROTO_OK // "OK"
|
|
};
|
|
|
|
cout(data, sizeof(data));
|
|
}
|
|
|
|
static void
|
|
invalid_response(void)
|
|
{
|
|
uint8_t data[] = {
|
|
PROTO_INSYNC, // "in sync"
|
|
PROTO_INVALID // "invalid command"
|
|
};
|
|
|
|
cout(data, sizeof(data));
|
|
}
|
|
|
|
static void
|
|
failure_response(void)
|
|
{
|
|
uint8_t data[] = {
|
|
PROTO_INSYNC, // "in sync"
|
|
PROTO_FAILED // "command failed"
|
|
};
|
|
|
|
cout(data, sizeof(data));
|
|
}
|
|
|
|
static volatile unsigned cin_count;
|
|
|
|
/**
|
|
* Function to wait for EOC
|
|
*
|
|
* @param timeout length of time in ms to wait for the EOC to be received
|
|
* @return true if the EOC is returned within the timeout perio, else false
|
|
*/
|
|
inline static bool
|
|
wait_for_eoc(unsigned timeout)
|
|
{
|
|
return cin(timeout) == PROTO_EOC;
|
|
}
|
|
|
|
static void
|
|
cout_word(uint32_t val)
|
|
{
|
|
cout((uint8_t *)&val, 4);
|
|
}
|
|
|
|
static uint32_t
|
|
crc32(const uint8_t *src, unsigned len, unsigned state)
|
|
{
|
|
static uint32_t crctab[256];
|
|
|
|
/* check whether we have generated the CRC table yet */
|
|
/* this is much smaller than a static table */
|
|
if (crctab[1] == 0) {
|
|
for (unsigned i = 0; i < 256; i++) {
|
|
uint32_t c = i;
|
|
|
|
for (unsigned j = 0; j < 8; j++) {
|
|
if (c & 1) {
|
|
c = 0xedb88320U ^ (c >> 1);
|
|
|
|
} else {
|
|
c = c >> 1;
|
|
}
|
|
}
|
|
|
|
crctab[i] = c;
|
|
}
|
|
}
|
|
|
|
for (unsigned i = 0; i < len; i++) {
|
|
state = crctab[(state ^ src[i]) & 0xff] ^ (state >> 8);
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
void
|
|
bootloader(unsigned timeout)
|
|
{
|
|
uint32_t address = board_info.fw_size; /* force erase before upload will work */
|
|
uint32_t first_word = 0xffffffff;
|
|
bool done_sync = false;
|
|
bool done_get_device = false;
|
|
|
|
chVTObjectInit(&systick_vt);
|
|
chVTSet(&systick_vt, chTimeMS2I(1), sys_tick_handler, nullptr);
|
|
|
|
/* if we are working with a timeout, start it running */
|
|
if (timeout) {
|
|
timer[TIMER_BL_WAIT] = timeout;
|
|
}
|
|
|
|
/* make the LED blink while we are idle */
|
|
led_set(LED_BLINK);
|
|
|
|
while (true) {
|
|
volatile int c;
|
|
int arg;
|
|
static union {
|
|
uint8_t c[256];
|
|
uint32_t w[64];
|
|
} flash_buffer;
|
|
|
|
// Wait for a command byte
|
|
led_off(LED_ACTIVITY);
|
|
|
|
do {
|
|
/* if we have a timeout and the timer has expired, return now */
|
|
if (timeout && !timer[TIMER_BL_WAIT]) {
|
|
return;
|
|
}
|
|
|
|
/* try to get a byte from the host */
|
|
c = cin(0);
|
|
|
|
} while (c < 0);
|
|
|
|
led_on(LED_ACTIVITY);
|
|
|
|
// handle the command byte
|
|
switch (c) {
|
|
|
|
// sync
|
|
//
|
|
// command: GET_SYNC/EOC
|
|
// reply: INSYNC/OK
|
|
//
|
|
case PROTO_GET_SYNC:
|
|
|
|
/* expect EOC */
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
done_sync = true;
|
|
break;
|
|
|
|
// get device info
|
|
//
|
|
// command: GET_DEVICE/<arg:1>/EOC
|
|
// BL_REV reply: <revision:4>/INSYNC/EOC
|
|
// BOARD_ID reply: <board type:4>/INSYNC/EOC
|
|
// BOARD_REV reply: <board rev:4>/INSYNC/EOC
|
|
// FW_SIZE reply: <firmware size:4>/INSYNC/EOC
|
|
// VEC_AREA reply <vectors 7-10:16>/INSYNC/EOC
|
|
// bad arg reply: INSYNC/INVALID
|
|
//
|
|
case PROTO_GET_DEVICE:
|
|
/* expect arg then EOC */
|
|
arg = cin(1000);
|
|
|
|
if (arg < 0) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
switch (arg) {
|
|
case PROTO_DEVICE_BL_REV: {
|
|
uint32_t bl_proto_rev = BL_PROTOCOL_VERSION;
|
|
cout((uint8_t *)&bl_proto_rev, sizeof(bl_proto_rev));
|
|
break;
|
|
}
|
|
|
|
case PROTO_DEVICE_BOARD_ID:
|
|
cout((uint8_t *)&board_info.board_type, sizeof(board_info.board_type));
|
|
break;
|
|
|
|
case PROTO_DEVICE_BOARD_REV:
|
|
cout((uint8_t *)&board_info.board_rev, sizeof(board_info.board_rev));
|
|
break;
|
|
|
|
case PROTO_DEVICE_FW_SIZE:
|
|
cout((uint8_t *)&board_info.fw_size, sizeof(board_info.fw_size));
|
|
break;
|
|
|
|
case PROTO_DEVICE_VEC_AREA:
|
|
for (unsigned p = 7; p <= 10; p++) {
|
|
uint32_t bytes = flash_func_read_word(p * 4);
|
|
|
|
cout((uint8_t *)&bytes, sizeof(bytes));
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
goto cmd_bad;
|
|
}
|
|
done_get_device = true;
|
|
break;
|
|
|
|
// erase and prepare for programming
|
|
//
|
|
// command: ERASE/EOC
|
|
// success reply: INSYNC/OK
|
|
// erase failure: INSYNC/FAILURE
|
|
//
|
|
case PROTO_CHIP_ERASE:
|
|
|
|
if (!done_sync || !done_get_device) {
|
|
// lower chance of random data on a uart triggering erase
|
|
goto cmd_bad;
|
|
}
|
|
|
|
/* expect EOC */
|
|
if (!wait_for_eoc(2)) {
|
|
goto cmd_bad;
|
|
}
|
|
|
|
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++) {
|
|
flash_func_erase_sector(i);
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
if (address == 0) {
|
|
// save the first word and don't program it until everything else is done
|
|
first_word = flash_buffer.w[0];
|
|
// replace first word with bits we can overwrite later
|
|
flash_buffer.w[0] = 0xffffffff;
|
|
}
|
|
|
|
arg /= 4;
|
|
for (int i = 0; i < arg; i++) {
|
|
// program the word
|
|
flash_func_write_word(address, flash_buffer.w[i]);
|
|
|
|
// do immediate read-back verify
|
|
if (flash_func_read_word(address) != flash_buffer.w[i]) {
|
|
goto cmd_fail;
|
|
}
|
|
|
|
address += 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;
|
|
}
|
|
|
|
// 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 == 0) && (first_word != 0xffffffff)) {
|
|
bytes = first_word;
|
|
|
|
} else {
|
|
bytes = flash_func_read_word(p);
|
|
}
|
|
|
|
sum = crc32((uint8_t *)&bytes, sizeof(bytes), sum);
|
|
}
|
|
|
|
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
|
|
|
|
// 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;
|
|
}
|
|
|
|
// program the deferred first word
|
|
if (first_word != 0xffffffff) {
|
|
flash_func_write_word(0, first_word);
|
|
|
|
if (flash_func_read_word(0) != first_word) {
|
|
goto cmd_fail;
|
|
}
|
|
|
|
// revert in case the flash was bad...
|
|
first_word = 0xffffffff;
|
|
}
|
|
|
|
// 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: {
|
|
/* 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();
|
|
|
|
// we got a command worth syncing, so kill the timeout because
|
|
// we are probably talking to the uploader
|
|
timeout = 0;
|
|
|
|
// send the sync response for this command
|
|
sync_response();
|
|
continue;
|
|
cmd_bad:
|
|
// 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;
|
|
}
|
|
}
|