User manual

Installation and Operation

FIGURE 2-2: VISUAL BASIC APPLICATION WINDOW

The PC GUI shows typical sections for each of the SPI slave devices present on the

MCP2210 SPI Slave Motherboard.

2.3.5 MCP23S08 GPIO Expander controls

The GUI provides specific controls in order to assist the user in exploring the I/O

expander features. The control for this chip shows eight color-coded buttons, each

representing an I/O option.

FIGURE 2-3: MCP23S08 GPIO EXPANDER SECTION

By double-clicking on any of the buttons, the assigned I/O pin will toggle from being a

digital input to digital output and back.

For the I/Os designated as digital inputs, any change on the pins will be shown on the

GUI in yellow (for a logic high value) or in blue (for a logic low value).

For the I/Os designated as digital outputs, a single click on any of the I/O circles will

toggle their output value from logic low (in red) to logic high (in green). When a digital

output is set to logic high, the corresponding LED will be lit.

2.3.6 EEPROM 25LC02 Controls

The EEPROM GUI section presents a data-grid control and three buttons (see

Figure 2-4). The data-grid is organized in eight columns and sixty-four rows. The

EEPROM addresses are read from left to right, top to bottom, starting at location 0 (in

I/O Expander

Section

Temperature

Sensor

Section

ADC Section

I/O Expander Section

Selected EEPROM Address

I/O buttons

Color coded

reference table

for I/O option