MeshCoreTel-firmware/variants/ikoka_handheld_nrf/variant.cpp

#include "variant.h"

#include "nrf.h"
#include "wiring_constants.h"
#include "wiring_digital.h"

const uint32_t g_ADigitalPinMap[] = {
  // D0 .. D10
  2,  // D0  is P0.02 (A0)
  3,  // D1  is P0.03 (A1)
  28, // D2  is P0.28 (A2)
  29, // D3  is P0.29 (A3)
  4,  // D4  is P0.04 (A4,SDA)
  5,  // D5  is P0.05 (A5,SCL)
  43, // D6  is P1.11 (TX)
  44, // D7  is P1.12 (RX)
  45, // D8  is P1.13 (SCK)
  46, // D9  is P1.14 (MISO)
  47, // D10 is P1.15 (MOSI)

  // LEDs
  26, // D11 is P0.26 (LED RED)
  6,  // D12 is P0.06 (LED BLUE)
  30, // D13 is P0.30 (LED GREEN)
  14, // D14 is P0.14 (READ_BAT)

  // LSM6DS3TR
  40, // D15 is P1.08 (6D_PWR)
  27, // D16 is P0.27 (6D_I2C_SCL)
  7,  // D17 is P0.07 (6D_I2C_SDA)
  11, // D18 is P0.11 (6D_INT1)

  // MIC
  42, // D19 is P1.10 (MIC_PWR)
  32, // D20 is P1.00 (PDM_CLK)
  16, // D21 is P0.16 (PDM_DATA)

  // BQ25100
  13, // D22 is P0.13 (HICHG)
  17, // D23 is P0.17 (~CHG)

  //
  21, // D24 is P0.21 (QSPI_SCK)
  25, // D25 is P0.25 (QSPI_CSN)
  20, // D26 is P0.20 (QSPI_SIO_0 DI)
  24, // D27 is P0.24 (QSPI_SIO_1 DO)
  22, // D28 is P0.22 (QSPI_SIO_2 WP)
  23, // D29 is P0.23 (QSPI_SIO_3 HOLD)

  // NFC
  9,  // D30 is P0.09 (NFC1)
  10, // D31 is P0.10 (NFC2)

  // VBAT
  31, // D32 is P0.31 (VBAT)
};

void initVariant() {
  // Disable reading of the BAT voltage.
  // https://wiki.seeedstudio.com/XIAO_BLE#q3-what-are-the-considerations-when-using-xiao-nrf52840-sense-for-battery-charging
  pinMode(VBAT_ENABLE, OUTPUT);
  // digitalWrite(VBAT_ENABLE, HIGH);
  //  This was taken from Seeed github butis not coherent with the doc,
  //  VBAT_ENABLE should be kept to LOW to protect P0.14, (1500/500)*(4.2-3.3)+3.3 = 3.9V > 3.6V
  //  This induces a 3mA current in the resistors :( but it's better than burning the nrf
  digitalWrite(VBAT_ENABLE, LOW);

  // disable xiao charging current, the handheld uses a tp4056 to charge
  // instead of the onboard xiao charging circuit. This charges at a max of
  // 780ma instead of 100ma. In theory you could enable both, but in practice
  // fire is scary.
  pinMode(PIN_CHARGING_CURRENT, OUTPUT);
  digitalWrite(PIN_CHARGING_CURRENT, HIGH);

  pinMode(PIN_QSPI_CS, OUTPUT);
  digitalWrite(PIN_QSPI_CS, HIGH);

  pinMode(LED_RED, OUTPUT);
  digitalWrite(LED_RED, HIGH);
  pinMode(LED_GREEN, OUTPUT);
  digitalWrite(LED_GREEN, HIGH);
  pinMode(LED_BLUE, OUTPUT);
  digitalWrite(LED_BLUE, HIGH);
}