dmascc_cfg - Configure dmascc devices
dmascc <interface> [<options>]
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.
- --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 persistence 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.
dmascc_cfg does not check the parameters for validity. The
driver or kernel may crash if you specify invalid values.
Klaus Kudielka
This manual page written by Craig Small <csmall@small.dropbear.id.au>