TDT RX7 User Manual page 7

System 3
Configuring the Programmable I/O Lines
Each of the eight bit-addressable lines can be independently configured as inputs or
outputs. The digital I/O lines can be configured as inputs or outputs in groups of
eight bits – that is as byte A, byte B, byte C, and byte D. Note, however, that the
bytes must be addressed as if part of a word, not as individual bytes. See
"Addressing Digital Bits In A Word" in the
By default, all bits are configured as inputs. This default setting is intended to
prevent damage to equipment that might be connected to the digital I/O lines. The
user can configure the bits in the RPvdsEx configuration register. The configuration
register is also used to determine what the eight front panel Bits lights represent.
To access the bit configuration register:
1.
2. In the Set Hardware Parameters dialog box, click the Device Type box
3. Click Modify to display the Edit I/O Setup Control dialog box.
4. To enable the check boxes, delete Und from the Decimal Value box.
5. To determine the desired value, select or clear the check boxes according to
6. When the configuration is complete, click OK to return to the Set Hardware
Bit #
0-7
8-11
12-14
Click the Device Setup command on the Implement menu.
and select the RX7 Elec-Stimulator from the list.
The dialog expands to display the Device Configuration Register.
In this dialog box, a series of check boxes are used to create a bitmask
that is used to program all bits.
the table below. By default, all check boxes are cleared (value = 0).
Selecting a check box sets the corresponding bit in the bitmask to one.
Parameters dialog box.
Each of these bits controls the configuration of one of the eight
addressable bits as inputs or outputs. Setting the bit to one will configure
that bit as an output.
Each of these bits controls the configuration of one of the four
addressable bytes as inputs or outputs. Setting the bit to one will
configure that byte as an output.
bit 8 - byte A, bit 9 - byte B, bit 10 - byte C, and bit 11 - byte D
Create a bit code that determines how the front panel Bits lights are
used, see table below.
RPvdsEx Manual
for more information.
Description
RX7 Stimulator Base Station
3-41