User manual

WiFly GSX
WiFlyGSX-um.pdf 12/14/2009
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increase the UART baudrate, set the flush size to 1460 and flush timer to a large value so full IP
packets are sent.
You can control the packet forwarding 3 ways:
set comm match <value> sets the value of the packet terminator. Each time the match
character is seen an IP packet will be sent. "set comm match 0xd" for example forwards once a
0xd hex character is seen..
set comm size <value> sets the flush size, the size is the number of bytes received before
forwarding. maximum value = 1460 bytes which is the size of a single Ethernet frame.
comm time <value> sets the flush timer, this is used to make sure that any partial data sitting the
RX buffer if no additional data is seen for “value” milliseconds. For example "set comm time 1000"
would wait for 1 second after no data was sent.
When sending more than a few hundred thousand bytes in a single transaction you should enable
hardware flow control. Your hardware will need to actively monitor CTS.
Flow control is not enabled by default. Flow control is set using with the following command.
set uart flow 1
It is possible to operate higher baudrates (greater than 115K) without flow control if packets are
uniform and an application protocol is used to ensure that each packet data is delivered on the
remote side before the next packet is sent.
However, given the uncertainty of packet delays in a TCP/IP network and the affects of interference
and retries inherent in wireless networks, flow control is usually required whenever large, contiguous
quantities of data are being written to the UART to guarantee no data is lost.
10.5 Setting GPIO direction, Alternate Functions and Disabling LEDs
The direction of the GPIO can be controlled with the GPIO mask using the set sys mask <value>
command to set the GPIO pin direction. Value is entered as a hex number. If you need to set only
one bit in the mask you need to read, mask and set the value. Otherwise you will over write any
previous GPIO settings.
The hex value represents a bit mask that controls each pin where 1 = output and 0 = input. For
example, set sys mask 0x0 sets all pins to input.
To set only GPIO 6 and 7 for example, you would enter set sys mask 0xc0
The default mask for WiFly = 0x21f0, which has GPIO 13, 8,7,6,5,4 as Outputs.
GPIO 0-3 are used internally on the module.
GPIO 4,5,6 are LEDs.
GPIO 9 is reserved as the ARM factory reset/adhoc mode, (read at powerup) and otherwise general
purpose input detect pin.
GPIO 10, 11 are the Uart RX, TX pins and TX does not need to be masked as an output.
GPIO12 is CTS (input) if used.
GPIO13 is RTS (output) if used.