NAME¶
dmascc_cfg - Configure dmascc devices
SYNOPSIS¶
dmascc <interface> [<options>]
DESCRIPTION¶
dmascc_cfg is used to configure dmascc devices such as PI2 and PackeTwin
cards. The
--show option can be used by any user, all other options
must be used by root.
OPTIONS¶
- --speed frequency
- Set frequency of baud rate generator to frequency. A
value of 0 disables the baud rate generator and the digital PLL. Use the
--show option to check whether the frequency you selected could be
approximated with sufficient accuracy.
- --nrzi [0|1]
- 0 selects NRZ mode, 1 selects NRZI mode.
- --clocks integer
- Set the clock mode. You may OR together three
choices (other values are not supported and may cause strange
results).
TX clock pin:
- 0x00 input
0x05 output TX clock *
0x06 output baud rate generator *
0x07 output digital PLL *
TX clock source:
- 0x00 RX clock pin
0x08 TX clock pin #
0x10 baud rate generator
0x18 digital PLL +
RX clock source:
- 0x00 RX clock pin
0x20 TX clock pin
0x40 baud rate generator
0x60 digital PLL +
* Not allowed on PI2 Port A if J3 is installed.
# TX clock pin must be configured as input.
+ Speed must be equal to 32 times the baud rate.
- --txdelay milliseconds
- Set transmit delay to milliseconds. Maximum is 2500
ms.
- --txtime seconds
- Set maximum time the transmitter may be active to
seconds.
- --sqdelay milliseconds
- Set the squelch delay to milliseconds. Maximum delay
is 2500 ms.
- --slottime milliseconds
- Set the slot time to milliseconds. Maximum slottime
is 2500 ms.
- --waittime milliseconds
- Set the minimum time between the transmitter turning off to
when it turns on to milliseconds. Maximum wait time is 2500
ms.
- --persist f
- Set the persistance parameter to f. Must be between
0 and 255 (inclusive).
- --dma channel
- Set the DMA channel to channel. Can be 1 or 3.
Setting to 0 disables DMA.
BUGS¶
dmascc_cfg does not check the parameters for validity. The driver or
kernel may crash if you specify invalid values.
AUTHORS¶
Klaus Kudielka
This manual page written by Craig Small <csmall@small.dropbear.id.au>
