Nano pin define fixes #2
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To match the pins as shown on the pinout page for the NANO 33 BLE SENSE
Tested with simple Arduino sketch:
```
int blink_pin = 2;
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
for (uint8_t i=0; i < 4; i++) {
digitalWrite(LED_BUILTIN, HIGH);
delay(100);
digitalWrite(LED_BUILTIN, LOW);
delay(100);
}
pinMode(LED_BUILTIN, INPUT);
Serial.begin(115200);
while (!Serial) {}
Serial.println("Quick blink pin test");
Serial.println (blink_pin);
pinMode(blink_pin, OUTPUT);
Serial.print("LED_BUILTIN: ");
Serial.println(LED_BUILTIN);
}
void loop() {
digitalWrite(blink_pin, HIGH);
delay(250);
digitalWrite(blink_pin, LOW);
delay(250);
if (Serial.available()) {
int new_pin = Serial.parseInt();
while (Serial.read() != -1) {
pinMode(blink_pin, INPUT);
blink_pin = new_pin;
pinMode(blink_pin, OUTPUT);
Serial.print("New pin: ");
Serial.println(blink_pin);
}
}
}
```
Where you can type in a pin number and then jumper that pin to D13 and it should blink the LED.
Fixed it for most of these pins, although 18 and 19 have issue with not blinking as zephyr has those
pins in use.
This matches the sate of the LED if you run it on MBED. Note: wondering if the led defines in some of the dtsi files should be renamed from user to PWR to match what is shown in the pinout for these boards. But maybe used elsewhere for USER, like maybe maybe python?
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Fix the connector pin list for pins 7, 8, 18, 19 and 21
Also second change was to change the PWR led to on at startup to match the behavior of the MBED builds.