Function 函數使用介面形式宣告

mhfo

參考

struct MyInterface {
    void (*foo)();
    void (*bar)();
};

void foo_impl() {
    printf("Inside foo implementation.\n");
}

void bar_impl() {
    printf("Inside bar implementation.\n");
}

int main() {
    struct MyInterface my_interface;

    my_interface.foo = foo_impl;
    my_interface.bar = bar_impl;

    my_interface.foo();
    my_interface.bar();

    return 0;
}

===========================================

函數原型
void I2C2_Initialize(void);
void I2C2_WriteByte(uint8_t wrByte);
uint8_t I2C2_ReadByte(void);
void I2C2_CallbackRegister(bool (*callback)(i2c_client_transfer_event_t clientEvent));

介面宣告
struct I2C_CLIENT_INTERFACE
{
    void (*Initialize)(void);   
   void (*WriteByte)(uint8_t wrByte);
    uint8_t(*ReadByte)(void);   
    void (*CallbackRegister)(bool (*handler)(i2c_client_transfer_event_t clientEvent));
    void (*Tasks)(void);
};


程式定義橋接
const struct I2C_CLIENT_INTERFACE I2C2_Client = {
    .Initialize = I2C2_Initialize,     
    .WriteByte = I2C2_WriteByte,
    .ReadByte = I2C2_ReadByte,   
    .CallbackRegister = I2C2_CallbackRegister,
    .Tasks = NULL
};



之後可以使用以下方式撰寫
I2C2_Client.WriteByte(0X55);


===================================
陣列行介面宣告，必須驗證其結果

typedef enum {
    I2C1_IDLE = 0,
    I2C1_SEND_ADR_READ,
    I2C1_SEND_ADR_WRITE,
    I2C1_TX,
    I2C1_RX,
    I2C1_RCEN,
    I2C1_TX_EMPTY,      
    I2C1_SEND_RESTART_READ,
    I2C1_SEND_RESTART_WRITE,
    I2C1_SEND_RESTART,
    I2C1_SEND_STOP,
    I2C1_RX_ACK,
    I2C1_RX_NACK_STOP,
    I2C1_RX_NACK_RESTART,
    I2C1_RESET,
    I2C1_ADDRESS_NACK,

} i2c1_fsm_states_t;




static i2c1_fsm_states_t I2C1_DO_IDLE(void);
static i2c1_fsm_states_t I2C1_DO_SEND_ADR_READ(void);
static i2c1_fsm_states_t I2C1_DO_SEND_ADR_WRITE(void);
static i2c1_fsm_states_t I2C1_DO_TX(void);
static i2c1_fsm_states_t I2C1_DO_RX(void);
static i2c1_fsm_states_t I2C1_DO_RCEN(void);
static i2c1_fsm_states_t I2C1_DO_TX_EMPTY(void);
static i2c1_fsm_states_t I2C1_DO_SEND_RESTART_READ(void);
static i2c1_fsm_states_t I2C1_DO_SEND_RESTART_WRITE(void);
static i2c1_fsm_states_t I2C1_DO_SEND_RESTART(void);
static i2c1_fsm_states_t I2C1_DO_SEND_STOP(void);
static i2c1_fsm_states_t I2C1_DO_RX_ACK(void);
static i2c1_fsm_states_t I2C1_DO_RX_NACK_STOP(void);
static i2c1_fsm_states_t I2C1_DO_RX_NACK_RESTART(void);
static i2c1_fsm_states_t I2C1_DO_RESET(void);
static i2c1_fsm_states_t I2C1_DO_ADDRESS_NACK(void);



static i2c1_fsm_states_t I2C1_DO_IDLE(void)
{
    I2C1_Status.busy = false;
    I2C1_Status.error = I2C1_NOERR;
    return I2C1_RESET;
}


typedef i2c1_fsm_states_t (*i2c1FsmHandler)(void);
const i2c1FsmHandler i2c1_fsmStateTable[] = {
    I2C1_DO_IDLE,
    I2C1_DO_SEND_ADR_READ,
    I2C1_DO_SEND_ADR_WRITE,
    I2C1_DO_TX,
    I2C1_DO_RX,
    I2C1_DO_RCEN,
    I2C1_DO_TX_EMPTY,
    I2C1_DO_SEND_RESTART_READ,
    I2C1_DO_SEND_RESTART_WRITE,
    I2C1_DO_SEND_RESTART,
    I2C1_DO_SEND_STOP,
    I2C1_DO_RX_ACK,
    I2C1_DO_RX_NACK_STOP,
    I2C1_DO_RX_NACK_RESTART,
    I2C1_DO_RESET,
    I2C1_DO_ADDRESS_NACK,
};