FDI LP3180, Руководство пользователя, Страница: 25 / 40

FDI
NXP LPC3180 Demo
User’s Manual
FDI
Rev 2 Page 25 9/7/2007
Pressing the Esc key/End button will exit functional test mode and boot the LPC3180
board into Linux as normal.
9.3 Test LEDs
This test verifies functional GPIO pins from the LPC3180 as well as proper operation
from the LEDs themselves. After selecting the test, the user may repeatedly press the
space key/OK button to light up LED 1, LED 2, or LED 3. The LEDs should follow the
pattern 1, 2, 3, and then repeat. As the user continually presses the test will echo out the
LED number currently lit. Figure 10 shows the LCD and LEDs after pressing the OK
button a number of times.
Figure 10: LED Test
To end the test, the Enter key/Clear button may be pressed. This will bring up the main
menu.
9.4 Test I2C1
The I2C1 Test proceeds to probe a range of addresses for devices connected to the I2C1
bus. This test begins immediately when the user selects it from the main menu. If an
address times out, a message is printed to the screen and the word “FAILED” is printed
in red indicating the there was a problem with the test. If the test runs correctly, two
devices should be found at 0x10 and 0x48. Figure 11 shows a successful test run for
I2C1.