1. make port_systick_reload the same as port_systick_config
you can use at framework to send/recv data in socket API example: see examples\tcp_through_module_based_at_socket project: see board\TencentOS_tiny_EVB_MX_Plus\KEIL\tcp_through_module_based_at_socket
1. IAR project, see TencentOS-tiny\board\ATMega32\IAR, both 4.12 and 7.20 is supplied.