GRMON3-UM
June 2019, Version 3.1.0
141 www.cobham.com/gaisler
47. i2c - syntax
NAME
i2c - Commands for the I2C masters
SYNOPSIS
i2c subcommand ?args...?
i2c index subcommand ?args...?
DESCRIPTION
This command provides functions to control the SPICTRL core. If more than one core exists in the system, then
the index of the core to control should be specified after the i2c command (before the subcommand). The 'info
sys' command lists the device indexes.
i2c bitrate rate
Initializes the prescaler register. Valid keywords for the parameter rate are normal, fast or hispeed.
i2c disable
i2c enable
Enable/Disable the core
i2c read i2caddr ?addr? ?cnt?
Performs cnt sequential reads starting at memory location addr from slave with i2caddr. Default value
of cnt is 1. If only i2caddr is specified, then a simple read will be performed.
i2c scan
Scans the bus for devices.
i2c status
Displays some status information about the core and the bus.
i2c write i2caddr ?addr? data
Writes data to memory location addr on slave with address i2caddr. If only i2caddr and data is
specified, then a simple write will be performed.
Commands to interact with DVI transmitters:
i2c dvi devices
List supported devices.
i2c dvi delay direction
Change delay applied to clock before latching data. Valid keywords for direction are inc or dec.
i2c dvi init_l4itx_dvi ?idf?
i2c dvi init_l4itx_vga ?idf?
Initializes Chrontel CH7301C DVI transmitter with values that are appropriate for the GR-LEON4-ITX
board with DVI/VGA output. The optional idf value selects the multiplexed data input format, default
is IDF 2.
i2c dvi init_ml50x_dvi ?idf?
i2c dvi init_ml50x_vga ?idf?
Initializes Chrontel CH7301C DVI transmitter with values that are appropriate for a ML50x board with a"
standard LEON/GRLIB template design for DVI/VGA output. The optional idf value selects the multi-
plexed data input format, default is IDF 2.
i2c dvi setdev devnr
Set DVI transmitter type. See command i2c dvi devices to list valid values of the parameter devnr.
i2c dvi showreg
Show DVI transmitter registers
RETURN VALUE
Upon successful completion i2c read returns a list of values read. The i2c dvi showreg return a list of tuples,
where the first element is the register address and the second element is the value.
The other sub commands has no return value.
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