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ardupilot/libraries/AP_IOMCU/fw_uploader.cpp

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/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
uploader for IOMCU partly based on px4io_uploader.cpp from px4
*/
/****************************************************************************
*
* Copyright (c) 2012-2015 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>
#if HAL_WITH_IO_MCU
#include "AP_IOMCU.h"
#include <AP_ROMFS/AP_ROMFS.h>
#include <AP_Math/crc.h>
#define debug(fmt, args ...) do { hal.console->printf("IOMCU: " fmt "\n", ## args); } while(0)
extern const AP_HAL::HAL &hal;
/*
upload a firmware to the IOMCU
*/
bool AP_IOMCU::upload_fw(void)
{
// set baudrate for bootloader
uart.begin(115200, 256, 256);
bool ret = false;
/* look for the bootloader for 150 ms */
for (uint8_t i = 0; i < 15; i++) {
ret = sync();
if (ret) {
break;
}
hal.scheduler->delay(10);
}
if (!ret) {
debug("IO update failed sync");
return false;
}
uint32_t bl_rev;
ret = get_info(INFO_BL_REV, bl_rev);
if (!ret) {
debug("Err: failed to contact bootloader");
return false;
}
if (bl_rev > BL_REV) {
debug("Err: unsupported bootloader revision %u", unsigned(bl_rev));
return false;
}
debug("found bootloader revision: %u", unsigned(bl_rev));
ret = erase();
if (!ret) {
debug("erase failed");
return false;
}
ret = program(fw_size);
if (!ret) {
debug("program failed");
return false;
}
if (bl_rev <= 2) {
ret = verify_rev2(fw_size);
} else {
ret = verify_rev3(fw_size);
}
if (!ret) {
debug("verify failed");
return false;
}
ret = reboot();
if (!ret) {
debug("reboot failed");
return false;
}
debug("update complete");
// sleep for enough time for the IO chip to boot
hal.scheduler->delay(100);
return true;
}
/*
receive a byte from the IO bootloader
*/
bool AP_IOMCU::recv_byte_with_timeout(uint8_t *c, uint32_t timeout_ms)
{
uint32_t start = AP_HAL::millis();
do {
int16_t v = uart.read();
if (v >= 0) {
*c = uint8_t(v);
return true;
}
hal.scheduler->delay_microseconds(50);
} while (AP_HAL::millis() - start < timeout_ms);
return false;
}
/*
receive multiple bytes from the bootloader
*/
bool AP_IOMCU::recv_bytes(uint8_t *p, uint32_t count)
{
bool ret = true;
while (count--) {
ret = recv_byte_with_timeout(p++, 5000);
if (!ret) {
break;
}
}
return ret;
}
/*
discard any pending bytes
*/
void AP_IOMCU::drain(void)
{
uint8_t c;
bool ret;
do {
ret = recv_byte_with_timeout(&c, 40);
} while (ret);
}
/*
send a byte to the bootloader
*/
bool AP_IOMCU::send(uint8_t c)
{
if (uart.write(c) != 1) {
return false;
}
return true;
}
/*
send a buffer to the bootloader
*/
bool AP_IOMCU::send(const uint8_t *p, uint32_t count)
{
bool ret = true;
while (count--) {
ret = send(*p++);
if (!ret) {
break;
}
}
return ret;
}
/*
wait for bootloader protocol sync
*/
bool AP_IOMCU::get_sync(uint32_t timeout_ms)
{
uint8_t c[2];
bool ret;
ret = recv_byte_with_timeout(c, timeout_ms);
if (!ret) {
return false;
}
ret = recv_byte_with_timeout(c + 1, timeout_ms);
if (!ret) {
return ret;
}
if ((c[0] != PROTO_INSYNC) || (c[1] != PROTO_OK)) {
debug("bad sync 0x%02x,0x%02x", c[0], c[1]);
return false;
}
return true;
}
/*
drain then get sync with bootloader
*/
bool AP_IOMCU::sync()
{
drain();
/* complete any pending program operation */
for (uint32_t i = 0; i < (PROG_MULTI_MAX + 6); i++) {
send(0);
}
send(PROTO_GET_SYNC);
send(PROTO_EOC);
return get_sync();
}
/*
get bootloader version
*/
bool AP_IOMCU::get_info(uint8_t param, uint32_t &val)
{
bool ret;
send(PROTO_GET_DEVICE);
send(param);
send(PROTO_EOC);
ret = recv_bytes((uint8_t *)&val, sizeof(val));
if (!ret) {
return ret;
}
return get_sync();
}
/*
erase IO firmware
*/
bool AP_IOMCU::erase()
{
debug("erase...");
send(PROTO_CHIP_ERASE);
send(PROTO_EOC);
return get_sync(10000);
}
/*
send new firmware to bootloader
*/
bool AP_IOMCU::program(uint32_t fw_size)
{
bool ret = false;
uint32_t sent = 0;
if (fw_size & 3) {
return false;
}
debug("programming %u bytes...", (unsigned)fw_size);
while (sent < fw_size) {
/* get more bytes to program */
uint32_t n = fw_size - sent;
if (n > PROG_MULTI_MAX) {
n = PROG_MULTI_MAX;
}
send(PROTO_PROG_MULTI);
send(n);
send(&fw[sent], n);
send(PROTO_EOC);
ret = get_sync(1000);
if (!ret) {
debug("Failed at %u", (unsigned)sent);
return false;
}
sent += n;
}
debug("upload OK");
return true;
}
/*
verify firmware for a rev2 bootloader
*/
bool AP_IOMCU::verify_rev2(uint32_t fw_size)
{
bool ret;
size_t sent = 0;
debug("verify...");
send(PROTO_CHIP_VERIFY);
send(PROTO_EOC);
ret = get_sync();
if (!ret) {
return ret;
}
while (sent < fw_size) {
/* get more bytes to verify */
uint32_t n = fw_size - sent;
if (n > 4) {
n = 4;
}
send(PROTO_READ_MULTI);
send(n);
send(PROTO_EOC);
for (uint8_t i = 0; i<n; i++) {
uint8_t c;
ret = recv_byte_with_timeout(&c, 5000);
if (!ret) {
debug("%d: got %d waiting for bytes", sent + i, ret);
return ret;
}
if (c != fw[sent+i]) {
debug("%d: got 0x%02x expected 0x%02x", sent + i, c, fw[sent+i]);
return false;
}
}
sent += n;
ret = get_sync();
if (!ret) {
debug("timeout waiting for post-verify sync");
return ret;
}
}
return true;
}
/*
verify firmware for a rev3 bootloader
*/
bool AP_IOMCU::verify_rev3(uint32_t fw_size_local)
{
bool ret;
uint32_t sum = 0;
uint32_t bytes_read = 0;
uint32_t crc = 0;
uint32_t fw_size_remote;
uint8_t fill_blank = 0xff;
debug("verify...");
ret = get_info(INFO_FLASH_SIZE, fw_size_remote);
send(PROTO_EOC);
if (!ret) {
debug("could not read firmware size");
return ret;
}
/* read through the firmware file again and calculate the checksum */
while (bytes_read < fw_size_local) {
uint32_t n = fw_size_local - bytes_read;
if (n > 4) {
n = 4;
}
/* calculate crc32 sum */
sum = crc_crc32(sum, &fw[bytes_read], n);
bytes_read += n;
}
/* fill the rest with 0xff */
while (bytes_read < fw_size_remote) {
sum = crc_crc32(sum, &fill_blank, 1);
bytes_read++;
}
/* request CRC from IO */
send(PROTO_GET_CRC);
send(PROTO_EOC);
ret = recv_bytes((uint8_t *)(&crc), sizeof(crc));
if (!ret) {
debug("did not receive CRC checksum");
return ret;
}
/* compare the CRC sum from the IO with the one calculated */
if (sum != crc) {
debug("CRC wrong: received: 0x%x, expected: 0x%x", (unsigned)crc, (unsigned)sum);
return false;
}
crc_is_ok = true;
return true;
}
/*
reboot IO MCU
*/
bool AP_IOMCU::reboot()
{
send(PROTO_REBOOT);
hal.scheduler->delay(200);
send(PROTO_EOC);
hal.scheduler->delay(200);
return true;
}
#endif // HAL_WITH_IO_MCU
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