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Breathing-blinking LED (BBLED)

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

mec172xevb_assy6906 evaluation board

  • 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.

mec15xxevb_assy6853 evaluation board

  • 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.