Klaus_K:
Power pins are not accessible by software, so they are not defined.The controller has more physical pins than the module/pcb. Some of these pins are connected on the pcb. For instance there is a RGB LED right next to the BLE module.
I suspect copy and paste from different sources.
Thanks Klaus_K.
Your answers are very useful. I was suspecting the copy and paste from different sources, as I tried (3u), (3), 3 and all seemed to work for redefining something.
I am also starting to understand the labeling.
Example:
GPIOs Nano # Port # Description #define Nano 33 BLE Pin Label
GPIO21 #21 P1.12 D3- (3u) D3
The variant.cpp file has some interesting information about this topic
#include "Arduino.h"
PinDescription g_APinDescription[] = {
// D0 - D7
P1_3, NULL, NULL, // D0/TX
P1_10, NULL, NULL, // D1/RX
P1_11, NULL, NULL, // D2
P1_12, NULL, NULL, // D3
P1_15, NULL, NULL, // D4
P1_13, NULL, NULL, // D5
P1_14, NULL, NULL, // D6
P0_23, NULL, NULL, // D7
// D8 - D13
P0_21, NULL, NULL, // D8
P0_27, NULL, NULL, // D9
P1_2, NULL, NULL, // D10
P1_1, NULL, NULL, // D11/MOSI
P1_8, NULL, NULL, // D12/MISO
P0_13, NULL, NULL, // D13/SCK/LED
// A0 - A7
P0_4, NULL, NULL, // A0
P0_5, NULL, NULL, // A1
P0_30, NULL, NULL, // A2
P0_29, NULL, NULL, // A3
P0_31, NULL, NULL, // A4/SDA
P0_2, NULL, NULL, // A5/SCL
P0_28, NULL, NULL, // A6
P0_3, NULL, NULL, // A7
// LEDs
P0_24, NULL, NULL, // LED R
P0_16, NULL, NULL, // LED G
P0_6, NULL, NULL, // LED B
P1_9, NULL, NULL, // LED PWR
P0_19, NULL, NULL, // INT APDS
// PDM
P0_17, NULL, NULL, // PDM PWR
P0_26, NULL, NULL, // PDM CLK
P0_25, NULL, NULL, // PDM DIN
// Internal I2C
P0_14, NULL, NULL, // SDA2
P0_15, NULL, NULL, // SCL2
// Internal I2C
P1_0, NULL, NULL, // I2C_PULL
P0_22, NULL, NULL, // VDD_ENV_ENABLE
};
extern "C" {
unsigned int PINCOUNT_fn() {
return (sizeof(g_APinDescription) / sizeof(g_APinDescription[0]));
}
}
#include "nrf_rtc.h"
void initVariant() {
// turn power LED on
pinMode(LED_PWR, OUTPUT);
digitalWrite(LED_PWR, HIGH);
// Errata Nano33BLE - I2C pullup is on SWO line, need to disable TRACE
// was being enabled by nrfx_clock_anomaly_132
CoreDebug->DEMCR = 0;
NRF_CLOCK->TRACECONFIG = 0;
// FIXME: bootloader enables interrupt on COMPARE[0], which we don't handle
// Disable it here to avoid getting stuck when OVERFLOW irq is triggered
nrf_rtc_event_disable(NRF_RTC1, NRF_RTC_INT_COMPARE0_MASK);
nrf_rtc_int_disable(NRF_RTC1, NRF_RTC_INT_COMPARE0_MASK);
// FIXME: always enable I2C pullup and power @startup
// Change for maximum powersave
pinMode(PIN_ENABLE_SENSORS_3V3, OUTPUT);
pinMode(PIN_ENABLE_I2C_PULLUP, OUTPUT);
digitalWrite(PIN_ENABLE_SENSORS_3V3, HIGH);
digitalWrite(PIN_ENABLE_I2C_PULLUP, HIGH);
NRF_PWM_Type* PWM[] = {
NRF_PWM0, NRF_PWM1, NRF_PWM2
#ifdef NRF_PWM3
,NRF_PWM3
#endif
};
for (unsigned int i = 0; i < (sizeof(PWM)/sizeof(PWM[0])); i++) {
PWM*->ENABLE = 0;*
_ PWM*->PSEL.OUT[0] = 0xFFFFFFFFUL;*_
_* }*_
_*}*_
<em>*#ifdef SERIAL_CDC*</em>
<em><em>static void utox8(uint32_t val, uint8_t* s) {</em></em>
_* for (int i = 0; i < 16; i=i+2) {*_
_* int d = val & 0XF;*_
_* val = (val >> 4);*_
_* s[15 - i -1] = d > 9 ? 'A' + d - 10 : '0' + d;*_
_* s[15 - i] = '\0';*_
_* }*_
_*}*_
<em><em>uint8_t getUniqueSerialNumber(uint8_t* name) {</em></em>
<em>* #define SERIAL_NUMBER_WORD_0 NRF_FICR->DEVICEADDR[1]*</em>
<em>* #define SERIAL_NUMBER_WORD_1 NRF_FICR->DEVICEADDR[0]*</em>
<em>* utox8(SERIAL_NUMBER_WORD_0, &name[0]);*</em>
<em>* utox8(SERIAL_NUMBER_WORD_1, &name[16]);*</em>
_* return 32;*_
_*}*_
<em>*void _ontouch1200bps_() {*</em>
<em>* __disable_irq();*</em>
<em>* NRF_POWER->GPREGRET = DFU_MAGIC_SERIAL_ONLY_RESET;*</em>
<em>* NVIC_SystemReset();*</em>
_*}*_
_*#endif*_
_*```*_