pins_arduino.h

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#pragma once
 
#include <stdint.h>
 
// --- Pin counts ----------------------------------------------------------------
#define PINS_COUNT          23  
#define NUM_DIGITAL_PINS    23  
#define NUM_ANALOG_INPUTS   6   

#define NOT_A_GPIO          0xFF

#define PHYDUINO_PIN_TO_GPIO {                                    \
    1, 0, 6, 7, 8, 9, 10, 15, 16, 17, 13, 11, 12, 14, /* D0-D13 */ \
    26, 27, 28,                                       /* A0-A2  */ \
    NOT_A_GPIO, NOT_A_GPIO, NOT_A_GPIO,               /* A3-A5  */ \
    24, 25,                                           /* SDA, SCL */ \
    5,                                                /* LED    */ \
}
 
// --- Named pins --------------------------------------------------------------
#define PIN_A0  (14u)  
#define PIN_A1  (15u)  
#define PIN_A2  (16u)  
#define PIN_A3  (17u)  
#define PIN_A4  (18u)  
#define PIN_A5  (19u)  
 
static const uint8_t A0 = PIN_A0;  
static const uint8_t A1 = PIN_A1;  
static const uint8_t A2 = PIN_A2;  
static const uint8_t A3 = PIN_A3;  
static const uint8_t A4 = PIN_A4;  
static const uint8_t A5 = PIN_A5;  
 
#define PIN_LED         (22u)    
#define LED_BUILTIN     PIN_LED  
 
// --- Serial1 / Serial2 (UART) -------------------------------------------------
#define PIN_SERIAL1_TX  (1u)    
#define PIN_SERIAL1_RX  (0u)    
#define PIN_SERIAL2_TX  (4u)    
#define PIN_SERIAL2_RX  (5u)    
 
// --- SPI (SPI1 on the header) --------------------------------------------------
#define PIN_SPI_SS      (10u)  
#define PIN_SPI_MOSI    (11u)  
#define PIN_SPI_MISO    (12u)  
#define PIN_SPI_SCK     (13u)  
#define PHYDUINO_SPI_INSTANCE   spi1  
 
static const uint8_t SS   = PIN_SPI_SS;    
static const uint8_t MOSI = PIN_SPI_MOSI;  
static const uint8_t MISO = PIN_SPI_MISO;  
static const uint8_t SCK  = PIN_SPI_SCK;   
 
// --- Wire (I2C0 on the header) -------------------------------------------------
#define PIN_WIRE_SDA    (20u)  
#define PIN_WIRE_SCL    (21u)  
#define PHYDUINO_WIRE_INSTANCE  i2c0  
 
static const uint8_t SDA = PIN_WIRE_SDA;  
static const uint8_t SCL = PIN_WIRE_SCL;  
 
// --- On-board peripherals (RP2040 GPIO numbers, not Arduino pins) ------------
// External ADC MAX11635 (U5) on SPI0: feeds A3-A5; AIN3 measures VBUS.
#define PHYDUINO_EXT_ADC_SPI        spi0  
#define PHYDUINO_EXT_ADC_GPIO_SCK   22    
#define PHYDUINO_EXT_ADC_GPIO_MOSI  23    
#define PHYDUINO_EXT_ADC_GPIO_MISO  20    
#define PHYDUINO_EXT_ADC_GPIO_CS    21    
#define PHYDUINO_EXT_ADC_GPIO_EOC   19    
#define PHYDUINO_EXT_ADC_GPIO_CNVST 18    
#define PHYDUINO_EXT_ADC_VREF_MV    2048  
#define PHYDUINO_EXT_ADC_VBUS_CH    3     
 
// USB-PD controller STUSB4500 (U6) on I2C1, address 0x28.
#define PHYDUINO_USBPD_I2C          i2c1  
#define PHYDUINO_USBPD_I2C_ADDR     0x28  
#define PHYDUINO_USBPD_GPIO_SDA     2     
#define PHYDUINO_USBPD_GPIO_SCL     3     
#define PHYDUINO_USBPD_GPIO_ALERT   4     
#define PHYDUINO_USBPD_GPIO_RESET   29    

#define PHYDUINO_ADC_VREF_MV        3300