u-blox C030-R412M, Руководство пользователя

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C030-R412M - User Guide
UBX-19010121 - R01 Hardware description Page 11 of 27
2.2.1 Utilization of cellular modem USB sniffer
The C030-R412M cellular modem USB sniffer provides two virtual UART COM channels to the
connected USB master (development PC). The cellular modem USB sniffer USB VBUS 5VDC rail power
the application section of the C030-R412M. The virtual COM ports are utilized as follows;

Standard COM port as on the development PC: HostMCU USART2 Tx “printf” Channel sniffing
o
HostMCU USART2 Tx is also connected to the InterfaceMCU on the utility section
o
HostMCU USART2 Rx is connected to InterfaceMCU on the utility section
o
Host HostMCU USART2 Rx can be connected to cellular modem USB sniffer Standard COM
port Tx channel via R137 link (see
Table 4 ). In this case, do one of the following:

The utility section should be powered off (disconnect Debug USB)

Snap off the utility section

Remove R133 link (see Table 4 )
 Enhanced COM port as on the development PC. Two operation modes can be selected by using S2
switch (see
Figure 4 ):
o
S2 position 1: Isolation
o
S2 position 2: HostMCU USART1 to cellular module communication. Allows direct access to
the cellular module. In this case, do one the following:

Remove R105 link

Set the HostMCU PA_5 Port as GPIO input to avoid collusion
☞
Enhanced COM port Mode 1 direct access to the cellular module allows using development PC
applications like u-blox m-center, to exercise cellular module AT command interface bypassing the
C030-R412M HostMCU.