umcpmioctl
—
Command line utility to interact with a MCP2221 / MCP2221A
multi-io chip
umcpmioctl |
[-dh ] device
status |
umcpmioctl |
[-dh ] device
get sram |
umcpmioctl |
[-dh ] device
get gp |
umcpmioctl |
[-dh ] device
get flash cs |
umcpmioctl |
[-dh ] device
get flash gp |
umcpmioctl |
[-dh ] device
get flash usbman |
umcpmioctl |
[-dh ] device
get flash usbprod |
umcpmioctl |
[-dh ] device
get flash usbsn |
umcpmioctl |
[-dh ] device
get flash chipsn |
umcpmioctl |
[-dh ] device
put flash gp GPn PIN_FUNCTION ...
GPn is one of GP0, GP1, GP2 or GP3
PIN_FUNCTION is one of GPIO_PIN_INPUT, GPIO_PIN_OUTPUT,
GPIO_PIN_ALT0, GPIO_PIN_ALT1, GPIO_PIN_ALT2, GPIO_PIN_ALT3,
DEFAULT_OUTPUT_ZERO, or DEFAULT_OUTPUT_ONE
For a put flash the GPn and PIN_FUNCTION
pairs may be repeated
|
The umcpmioctl
utility interacts with a MCP2221 /
MCP2221A and can be used to pull the status of the chip, get the SRAM values,
get the values from the onboard FLASH and can be used to set some of the FLASH
values assoicated with the gpio pins. The values from flash are copied into
the SRAM when the chip enumerates or powers up.
umcpmioctl /dev/umcpmio0ctl
status
Query the chip for its status.
umcpmioctl /dev/umcpmio0ctl get
sram
Return the values from the SRAM on the chip.
umcpmioctl /dev/umcpmio0ctl get flash
cs
Return the values for the chip settings from the FLASH.
umcpmioctl /dev/umcpmio0ctl put flash
gp GP0 GPIO_PIN_INPUT
This will set the GP0 pin to be an input pin on start up of the
chip.
umcpmioctl /dev/umcpmio0ctl put flash
gp GP2 GPIO_PIN_OUTPUT GP0 GPIO_PIN_ALT0
This will set the GP2 pin to be an output pin and GP0 pin to have
the ALT0 function upon chip start up.
The umcpmioctl
utility first appeared in
NetBSD 11.0.
Only the gpio settings can be changed in FLASH.
The output is not very pleasent to use and one will probably need
to have the datasheet for the MCP2221 / MCP2221A on hand to make sense of
it.