i2c.h

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#pragma once
#include "daisy_core.h"
 
namespace daisy
{
class I2CHandle
{
  public:
    struct Config
    {
        enum class Mode
        {
            I2C_MASTER,
            I2C_SLAVE,
        };
 
        enum class Peripheral
        {
            I2C_1 = 0, 
            I2C_2,     
            I2C_3,     
            I2C_4,     
        };
 
        enum class Speed
        {
            I2C_100KHZ, 
            I2C_400KHZ, 
            I2C_1MHZ,   
        };
 
        Peripheral periph; 
        struct
        {
            dsy_gpio_pin scl; 
            dsy_gpio_pin sda; 
        } pin_config;         
        Speed speed; 
        Mode  mode;  
        // 0x10 is chosen as a default to avoid conflicts with reserved addresses
        uint8_t address = 0x10; 
    };
 
    enum class Result
    {
        OK, 
        ERR 
    };
 
    enum class Direction
    {
        TRANSMIT, 
        RECEIVE,  
    };
 
    I2CHandle() : pimpl_(nullptr) {}
    I2CHandle(const I2CHandle& other) = default;
    I2CHandle& operator=(const I2CHandle& other) = default;
 
    Result Init(const Config& config);
 
    const Config& GetConfig() const;
 
    Result TransmitBlocking(uint16_t address,
                            uint8_t* data,
                            uint16_t size,
                            uint32_t timeout);
 
    Result ReceiveBlocking(uint16_t address,
                           uint8_t* data,
                           uint16_t size,
                           uint32_t timeout);
 
    typedef void (*CallbackFunctionPtr)(void* context, Result result);
 
    Result TransmitDma(uint16_t            address,
                       uint8_t*            data,
                       uint16_t            size,
                       CallbackFunctionPtr callback,
                       void*               callback_context);
 
    Result ReceiveDma(uint16_t            address,
                      uint8_t*            data,
                      uint16_t            size,
                      CallbackFunctionPtr callback,
                      void*               callback_context);
 
    Result ReadDataAtAddress(uint16_t address,
                             uint16_t mem_address,
                             uint16_t mem_address_size,
                             uint8_t* data,
                             uint16_t data_size,
                             uint32_t timeout);
 
    Result WriteDataAtAddress(uint16_t address,
                              uint16_t mem_address,
                              uint16_t mem_address_size,
                              uint8_t* data,
                              uint16_t data_size,
                              uint32_t timeout);
 
 
    class Impl; 
  private:
    Impl* pimpl_;
};
 
extern "C"
{
    void dsy_i2c_global_init();
};
 
} // namespace daisy