SCMDSPI(4) | Device Drivers Manual | SCMDSPI(4)

# NAME

`scmdspi` — SPI frontend to the Sparkfun Serial Controlled Motor Driver

# SYNOPSIS

`scmd* at spi? slave 0`
`scmd* at spi? slave 1`

# DESCRIPTION

The `scmdspi` driver provides the SPI frontend attachment for the Sparkfun SCMD device.

# SYSCTL VARIABLES

The following sysctl(3) variables are inherited from scmd(4) :

`hw.scmd0.debug`
  If the driver is compiled with `SCMD_DEBUG`, this node will appear and can be used to set the debugging level.

# FILES

/dev/scmd u
  character device allowing access to the register space of a main u, SCMD device

# SEE ALSO

iic(4), spi(4), scmdi2c(4), scmdspi(4), scmdctl(1), sysctl(8)

# HISTORY

The `scmdspi` driver first appeared in NetBSD 10.0.

# AUTHORS

The `scmdspi` driver was written by Brad Spencer <brad@anduin.eldar.org>.

# BUGS

When used in SPI mode, the SCMD device uses an odd method of doing reads that can become stuck. See the command spi_read_one in the scmdctl(1) utility to try and unstick the device when this happens.

December 1, 2021 | NetBSD 11.0