strncpy(version, ver, IOTX_FIRMWARE_VER_LEN)
->
strncpy(version, ver, len);

tcp -> udp

tcp -> udp

tcp -> udp

tcp -> udp

Mini optimized

add EVB_LN822x  iot exporer demo

in tos_kv_has_key, if an item is found, should kv_item_free it later.

use a rel/rela section's sh_info to resolve which section this rel will be applied to, rather than the section's name

mostly copied from linux kernel 4.20, Shh...

1. elfloader for shared object
example: TencentOS-tiny\examples\elfloader_shared_object
keil: TencentOS-tiny\board\TencentOS_tiny_EVB_MX_Plus\KEIL\elfloader_shared_object

2. elfloader for relocatable object:
example: TencentOS-tiny\examples\elfloader_relocatable_object
keil: TencentOS-tiny\board\TencentOS_tiny_EVB_MX_Plus\KEIL\elfloader_relocatable_object

3. TODO:
- add icache/dcache flush when module is loaded
- support more relocation type in elfloader_arch_relocate

1. see board\TencentOS_tiny_EVB_MX_Plus\KEIL\fatfs_through_vfs

LoRaMac-node-4.4.4 demo

1. effective "Differential Upgrade" patch algorithm with high compression rate
2. effective recovery algorithm support recovery firmware in blocks which has low memory consumption and wear-leveling strategies, especially suitable for embeded devices with low RAM.
3. add sample ota bootloader project, see:
board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_bootloader_recovery
4. add sample application project for download firmware through http, see:
board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_http
5. add sample application project for download firmware through qcloud explorer console, see:
board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_qcloud_iot_explorer
6. an OTA markdown document is pending

Update LoRaMac-node to Version 4.4.4，fix Security breach found by Tencent Blade Team please refer to security advisory - CVE-2020-11068

fix Security breach found by Tencent Blade Team please refer to security advisory - CVE-2020-11068

1. iot-hub sdk update to 3.2.0
2. iot-explorer update to 3.1.1

1. make port_systick_reload the same as port_systick_config