| .. _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. |
