AP_Bootloader: added app descriptor checking for CAN fw

This commit is contained in:
Andrew Tridgell 2019-10-21 17:11:14 +11:00
parent 1b0991e29f
commit f672829e7f
4 changed files with 61 additions and 2 deletions

View File

@ -83,6 +83,15 @@ int main(void)
timeout = 10000;
can_set_node_id(m & 0xFF);
}
if (!can_check_firmware()) {
// bad firmware CRC, don't try and boot
timeout = 0;
try_boot = false;
} else if (timeout != 0) {
// fast boot for good firmware
try_boot = true;
timeout = 1000;
}
#endif
// if we fail to boot properly we want to pause in bootloader to give

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@ -19,6 +19,7 @@
#if HAL_USE_CAN == TRUE
#include <AP_Math/AP_Math.h>
#include <AP_Math/crc.h>
#include <canard.h>
#include "support.h"
#include <uavcan/protocol/dynamic_node_id/Allocation.h>
@ -32,6 +33,7 @@
#include "bl_protocol.h"
#include <drivers/stm32/canard_stm32.h>
#include "app_comms.h"
#include <stdio.h>
static CanardInstance canard;
@ -221,8 +223,10 @@ static void handle_file_read_response(CanardInstance* ins, CanardRxTransfer* tra
fw_update.node_id = 0;
// now flash the first word
flash_func_write_word(0, app_first_word);
if (can_check_firmware()) {
jump_to_app();
}
}
// show offset number we are flashing in kbyte as crude progress indicator
node_status.vendor_specific_status_code = 1 + (fw_update.ofs / 1024U);
@ -538,6 +542,43 @@ void can_set_node_id(uint8_t node_id)
initial_node_id = node_id;
}
/*
check firmware CRC to see if it matches
*/
bool can_check_firmware(void)
{
const uint8_t sig[8] = { 0x40, 0xa2, 0xe4, 0xf1, 0x64, 0x68, 0x91, 0x06 };
const uint8_t *flash = (const uint8_t *)(FLASH_LOAD_ADDRESS + FLASH_BOOTLOADER_LOAD_KB*1024);
const uint32_t flash_size = (BOARD_FLASH_SIZE - FLASH_BOOTLOADER_LOAD_KB)*1024;
const uint8_t desc_len = 16;
const uint8_t *ptr = (const uint8_t *)memmem(flash, flash_size-(desc_len+sizeof(sig)), sig, sizeof(sig));
if (ptr == nullptr) {
// no application signature
printf("No app sig\n");
return false;
}
ptr += sizeof(sig);
uint32_t desc[4];
memcpy(desc, ptr, sizeof(desc));
// check length
if (desc[2] > flash_size) {
printf("Bad fw length %u\n", desc[2]);
return false;
}
uint32_t len1 = ptr - flash;
uint32_t len2 = desc[2] - (len1 + sizeof(desc));
uint32_t crc1 = crc_crc32(0, flash, len1);
uint32_t crc2 = crc_crc32(0, ptr+sizeof(desc), len2);
if (crc1 != desc[0] || crc2 != desc[1]) {
printf("Bad app CRC 0x%08x:0x%08x 0x%08x:0x%08x\n", desc[0], desc[1], crc1, crc2);
return false;
}
printf("Good firmware\n");
return true;
}
void can_start()
{
#if HAL_RAM_RESERVE_START >= 256

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@ -1,3 +1,5 @@
void can_start();
void can_update();
void can_set_node_id(uint8_t node_id);
bool can_check_firmware(void);

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@ -10,12 +10,19 @@ def build(bld):
target='libcanard')
bld.ap_program(
use=['ap','libcanard'],
use=['ap','libcanard','AP_Bootloader_libs'],
program_groups='bootloader',
includes=[bld.env.SRCROOT + '/modules/libcanard',
bld.env.BUILDROOT + '/modules/libcanard/dsdlc_generated']
)
bld.ap_stlib(
name= 'AP_Bootloader_libs',
ap_vehicle='AP_Bootloader',
ap_libraries= [
'AP_Math'
])
bld(
# build libcanard headers
source=bld.path.ant_glob("modules/uavcan/dsdl/**/*.uavcan libraries/AP_UAVCAN/dsdl/**/*.uavcan"),