i2c_4 test

I2CTestSimple.cpp

#include "daisy_seed.h"

using namespace daisy;

// I2C pins
constexpr Pin PIN_I2C1_SCL = seed::D11; // 12
constexpr Pin PIN_I2C1_SDA = seed::D12; // 13

constexpr Pin PIN_I2C4_SCL = seed::D13; // 14
constexpr Pin PIN_I2C4_SDA = seed::D14; // 15

static I2CHandle::Config i2c_config;

DaisySeed hardware;

I2CHandle         i2c_handle;
I2CHandle::Result res;

I2CHandle::Result InitDriver()
{
    i2c_config.periph = I2CHandle::Config::Peripheral::I2C_1; // works
    // i2c_config.periph = I2CHandle::Config::Peripheral::I2C_4; // does not work

    i2c_config.speed          = I2CHandle::Config::Speed::I2C_100KHZ;
    i2c_config.mode           = I2CHandle::Config::Mode::I2C_MASTER;
    i2c_config.pin_config.scl = PIN_I2C4_SCL;
    i2c_config.pin_config.sda = PIN_I2C4_SDA;

    return i2c_handle.Init(i2c_config);
}

I2CHandle::Result I2CSend(uint16_t val)
{
    uint8_t cmd = 0b00000111; // Write to channel H
    uint8_t lsb, msb;

    msb = val >> 4;
    lsb = val << 4;

    uint16_t address = 0b1001000;

    uint8_t  data[3] = {cmd, msb, lsb};
    uint16_t size    = 3;
    uint32_t timeout = 10000;

    return i2c_handle.TransmitBlocking(address, data, size, timeout);
}

int main(void)
{
    hardware.Init();
    res = InitDriver();

    bool     blink = false;
    uint16_t i     = 0;
    while(1)
    {
        res = I2CHandle::Result::ERR;
        I2CSend(i);
        i += 64;

        hardware.SetLed(blink);
        blink = !blink;

        hardware.DelayMs(200);
    }
}