src/rp2040/rp2040_interface_pins.json

{
    "UART": {
        "0": {
            "TX":  [0, 12, 16, 28],
            "RX":  [1, 13, 17, 29],
            "CTS": [2, 14, 18],
            "RTS": [3, 15, 19]
       },
       "1": {
            "TX":  [4, 8,  20, 24],
            "RX":  [5, 9,  21, 25],
            "CTS": [6, 10, 22, 26],
            "RTS": [7, 11, 23, 27]
       }
    },
    "I2C": {
        "0": {
            "SDA": [0, 4, 8,  12, 16, 20, 24, 28],
            "SCL": [1, 5, 9,  13, 17, 21, 25, 29]
       },
       "1": {
            "SDA": [2, 6, 10, 14, 18, 22, 26],
            "SCL": [3, 7, 11, 15, 19, 23, 27]
       }
    },
    "SPI": {
        "0": {
            "RX":  [0,  4,  16, 20],
            "CSN": [1,  5,  17, 21],
            "SCK": [2,  6,  18, 22],
            "TX":  [3,  7,  19, 23]
       },
       "1": {
            "RX":  [8,  12, 24, 28],
            "CSN": [9,  13, 25, 29],
            "SCK": [10, 14, 26],
            "TX":  [11, 15, 27]
       }
    },
    "PWM": {
        "0": {
            "A": [0,  16],
            "B": [1,  17]
        },
        "1": {
            "A": [2,  18],
            "B": [3,  19]
        },
        "2": {
            "A": [4,  20],
            "B": [5,  21]
        },
        "3": {
            "A": [6,  22],
            "B": [7,  23]
        },
        "4": {
            "A": [8,  24],
            "B": [9,  25]
        },
        "5": {
            "A": [10, 26],
            "B": [11, 27]
        },
        "6": {
            "A": [12, 28],
            "B": [13, 29]
        },
        "7": {
            "A": [14],
            "B": [15]
        }
    }
}