76 lines
2.4 KiB
ReStructuredText
76 lines
2.4 KiB
ReStructuredText
.. _led:
|
|
|
|
LED sample application
|
|
##########################
|
|
|
|
Overview
|
|
********
|
|
|
|
This sample allows to test the Microchip led-xec driver which uses the
|
|
breathing-blinking LED (BBLED) controllers. The SoC design is fixed
|
|
allowing each BBLED control over one specific GPIO.
|
|
MEC15xx and MEC172x:
|
|
BBLED controller 0 uses GPIO 0156.
|
|
BBLED controller 1 uses GPIO 0157.
|
|
BBLED controller 2 uses GPIO 0153.
|
|
MEC172x has a fourth instance of BBLED.
|
|
BBLED controller 3 uses GPIO 0035
|
|
|
|
Test pattern
|
|
============
|
|
|
|
For each LEDs (one after the other):
|
|
|
|
- Turning on
|
|
- Turning off
|
|
- Blinking on: 0.1 sec, off: 0.1 sec
|
|
- Blinking on: 1 sec, off: 1 sec
|
|
|
|
Board Jumpers
|
|
********************
|
|
|
|
EVB: mec172xevb_assy6906
|
|
BBLED0 GPIO 0156.
|
|
Connect GPIO 0156 to board LED4 by placing a wire from JP71-11 to J47-3.
|
|
Make sure there are no jumpers on JP54 1-2 and JP21 4-5
|
|
|
|
BBLED1 GPIO 0157.
|
|
Connect GPIO 0156 to board LED5 by placing a wire from JP71-12 to J48-3.
|
|
Make sure there are no jumpers on JP54 3-4 and JP21 16-17
|
|
|
|
BBLED2 GPIO 0153.
|
|
Connect GPIO 0153 to board LED7 by placing a wire from JP71-5 to JP146-5.
|
|
JP146-5 is connected to MEC172x VCI_OUT1 without a jumper. Force VCI_OUT1
|
|
high by forcing VCI_IN1 high: install jumper on J55 3-4 which pulls VCI_IN1
|
|
to the VBAT rail via a 100K pull-up. Requires VBAT power rail is connected
|
|
to VTR or some other power source.
|
|
|
|
BBLED3 GPIO 0035.
|
|
Connect GPIO 0035 to board LED7 by placing a wire from JP67-19 to JP146-1.
|
|
Make sure there is no jumper on JP79 17-18.
|
|
JP146-1 is connected to MEC172x VCI_OUT2 without a jumper. Force VCI_OUT2
|
|
high by forcing VCI_IN2 high: install a jumper on J55 5-6 which pulls VCI_IN2
|
|
to the VBAT rail via a 100K pull-up. Requires VBAT power rail is connected
|
|
to VTR or some other power source.
|
|
|
|
EVB: mec15xxevb_assy6853
|
|
BBLED0 GPIO 0156.
|
|
Add jumper on JP41 1-2 to connect GPIO 0156 to board LED2
|
|
Remove jumper on JP31 13-14
|
|
|
|
BBLED1 GPIO 0157.
|
|
Add jumper on JP41 3-4 to connect GPIO 0157 to board LED3
|
|
Remove jumper on JP31 15-16
|
|
|
|
BBLED2 GPIO 0153.
|
|
Add jumper on JP41 3-4 to connect GPIO 0153 to board LED4
|
|
Remove jumper on JP31 17-18
|
|
|
|
Building and Running
|
|
********************
|
|
|
|
This sample can be built and executed on all the boards with the LEDs connected.
|
|
The LEDs must be correctly described in the DTS. Each breathing-blinking LED
|
|
controller is fixed by chip design to connect to one GPIO. The bbled node must
|
|
have its PINCTRL properties set to the correct GPIO.
|