Hi,
I'm trying to use a FTDI VNC to give a microcontroler (Texas MSP430) USB capabilities. I connect both via UART.
The VNC2 uses a UART with flow control RTS/CTS and the MSP doesn't use it, so I guess I have to emulate using some GPIO (General Purpose Input/Output) pins (with interrupt capabilities) on MSP430 so they can comunicate each other.
I'm trying to understand how RTS/CTS lines works but I haven't been able to understand it completely with USER manuals from FTDI.
The lines are cross-connected so VNC_TX connects to MSP_RX, VNC_RX to MSP_TX, VNC_RTS to MSP_CTS and VNC_CTS to MSP_RTS. As suggested on FTDI user manual.
RTS= Request to send
CTS= Clear to send.
TX= Transmition Line.
RX= Reception Line.
The MSP sends commands and VNC responds with data.
How the MSP430 initiate the communication?. Just activating the RTS line (MSP_RTS). and waiting the other side responds activating the CTS line(VNC_RTS)?, or RTS line is used just to allow/stop the data on RX line.
Any help would be appreciated.
I'm trying to use a FTDI VNC to give a microcontroler (Texas MSP430) USB capabilities. I connect both via UART.
The VNC2 uses a UART with flow control RTS/CTS and the MSP doesn't use it, so I guess I have to emulate using some GPIO (General Purpose Input/Output) pins (with interrupt capabilities) on MSP430 so they can comunicate each other.
I'm trying to understand how RTS/CTS lines works but I haven't been able to understand it completely with USER manuals from FTDI.
The lines are cross-connected so VNC_TX connects to MSP_RX, VNC_RX to MSP_TX, VNC_RTS to MSP_CTS and VNC_CTS to MSP_RTS. As suggested on FTDI user manual.
RTS= Request to send
CTS= Clear to send.
TX= Transmition Line.
RX= Reception Line.
The MSP sends commands and VNC responds with data.
How the MSP430 initiate the communication?. Just activating the RTS line (MSP_RTS). and waiting the other side responds activating the CTS line(VNC_RTS)?, or RTS line is used just to allow/stop the data on RX line.
Any help would be appreciated.