流程图如下：

' V/ T* C5 G; L: u

uint32_t __IO SR1Register =0;

    /* Read the I2C1 status register */
    SR1Register = I2C1->SR1;
    /* If AF = 1 */
    if ((SR1Register & 0x0400) == 0x0400)
% b" L4 z' L+ i4 x    {
  N5 }) j0 |( x+ @        I2C1->SR1 &= 0xFBFF;
, I3 C, T) k- b  u" x        SR1Register = 0;
    }
    /* If ARLO = 1 */
    if ((SR1Register & 0x0200) == 0x0200)
    {
        I2C1->SR1 &= 0xFBFF;
        SR1Register = 0;
6 ?: O: v( {' ^7 D( I    }
5 t+ E- I' z+ L; z$ b7 Z- z    /* If BERR = 1 */
& _8 K1 F3 x, @7 x5 v1 V- c    if ((SR1Register & 0x0100) == 0x0100)
    {
        I2C1->SR1 &= 0xFEFF;
: I. |- z" \9 d) X9 P+ u% {7 K        SR1Register = 0;
: z: z+ ?( O7 s' O    }
    /* If OVR = 1 */
    if ((SR1Register & 0x0800) == 0x0800)
    {
6 s- ]+ [; c( N3 r8 `$ G' X  Z        I2C1->SR1 &= 0xF7FF;
        SR1Register = 0;
; C1 ?# v0 }0 s# a2 g    }

i2c的例子多是寄存器或库函数顺序查询方式的，众多的不多见，此贴是很好的参考。

STM32 I2C 硬件中断方式实现方法，带流程图

I2C 中断处理函数如下：
 
/**
  * @brief  This function handles I2C1 Event interrupt request, tx, rx
9 K& _2 u" A# j" q  *         buffer and number of bytes will be changed.
3 {5 t+ J" W6 _) b4 p1 x- i  * @param  None
! ~# y* W. J/ r; C' q5 E& @  * @retval None
/ p! ?6 l7 V7 n4 q/ P  */
void I2C1_EV_IRQHandler(void)
( o5 f3 ]6 d6 C0 l0 l{
#ifdef ARC_I2C_IRQ
( c# O( b+ _! t" ^    uint32_t i2cEvent;
    I2C_param_struct __IO *pI2C_param;
7 i  q7 s9 t. B5 r
    pI2C_param = ARC_get_I2C_param();
    i2cEvent = I2C_GetLastEvent(I2C1);
   
    switch (i2cEvent)
4 X" X* E0 i9 O, _    {
        case I2C_EVENT_MASTER_MODE_SELECT:/* EV5 */
            if(pI2C_param->I2C_DIRECTION == ARC_I2C_DIRECTION_TX)
1 p  `# v* N+ R, K            {
                I2C_Send7bitAddress(I2C1, pI2C_param->DeviceAddr, I2C_Direction_Transmitter);
            }
3 J6 q& i  l! e) r6 v+ O7 v            else
4 i- \9 |' L9 O4 ^& X3 D9 {) p$ k* e            {
                I2C_Send7bitAddress(I2C1, pI2C_param->DeviceAddr, I2C_Direction_Receiver);
            }
            break;
, u% k. }3 R% \; H. J
        /* Master Transmitter -------------------------------------------------------*/
        case I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED:
            I2C_SendData(I2C1, pI2C_param->SubAddr);
+ [+ `; M- D$ ~2 }            if(pI2C_param->TxNumOfBytes == 0)
6 g5 [4 \$ d9 {3 Z                I2C_ITConfig(I2C1, I2C_IT_BUF, DISABLE);
            break;
          
        case I2C_EVENT_MASTER_BYTE_TRANSMITTING:  /* Without BTF, EV8 */    
5 l7 l# M& E9 Z; |            if(pI2C_param->TX_I2C_Index < pI2C_param->TxNumOfBytes)
            {
' ~) v/ G  W5 Q$ ~' A6 U3 j, o                I2C_SendData(I2C1, pI2C_param->TxData[pI2C_param->TX_I2C_Index++]);
3 k5 f+ m& Z% e7 x8 Y7 H; }            }
; F# x3 m  `  C; u; S% b* R3 I* o            else
            {     
                I2C_ITConfig(I2C1, I2C_IT_BUF, DISABLE);
            }
            break;

/ S) H8 e8 r" C5 @3 I  R0 ?% J        case I2C_EVENT_MASTER_BYTE_TRANSMITTED: /* With BTF EV8-2 */
           if(pI2C_param->TX_Generate_stop == 1)
           {
% [) G  m: |- N0 N9 F5 [             I2C_GenerateSTOP(I2C1, ENABLE);
             I2C_ITConfig(I2C1, I2C_IT_EVT, DISABLE);
6 ?" [; W  u5 ~# ?           }
           else
/ e3 U2 C6 X/ f           {
* o+ f5 S% _* l3 Z. E8 ?; p' Y             pI2C_param->I2C_DIRECTION = ARC_I2C_DIRECTION_RX;
             I2C_ITConfig(I2C1, I2C_IT_BUF, ENABLE);
. ^2 ^- [( e" D             I2C_GenerateSTART(I2C1, ENABLE);
           }
           break;
/ Q8 t, d' S+ \
        /* Master Receiver -------------------------------------------------------*/
7 C. ]. O; z5 ]' k" k' O$ e- d        case I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED:
            if(pI2C_param->RX_I2C_Index == (pI2C_param->RxNumOfBytes - 1))
            {
                I2C_AcknowledgeConfig(I2C1, DISABLE);
                I2C_GenerateSTOP(I2C1, ENABLE);
" {9 p: c" W; f; J            }
- [6 }3 W+ Z9 e; \3 I% B            break;

9 P7 `4 Q2 o- p9 f        case I2C_EVENT_MASTER_BYTE_RECEIVED:
            pI2C_param->RxData[pI2C_param->RX_I2C_Index++] = I2C_ReceiveData (I2C1);
5 v' y# i) A, |# z' q1 h            if(pI2C_param->RX_I2C_Index == (pI2C_param->RxNumOfBytes - 1))
            {
/ M2 ?# u0 V4 r1 |                I2C_AcknowledgeConfig(I2C1, DISABLE);
. l* R/ b  T0 J  a7 s. C( z                I2C_GenerateSTOP(I2C1, ENABLE);
4 U5 t) W) E4 t/ Q4 q1 b            }
% ]0 D* V; s& I" K- x            break;
& A! R7 \6 |& O
        default:
            break;
1 g  e- {# c0 V, x& k    }

$ f9 F! {" M# M0 j#endif
}
 

c 文件请看附件
5 |, B2 W' q! a' W9 z 

具体实例，使用硬件 I2C 访问 EEPROM.

谢谢分享啊

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谢谢楼主

Thanks !!!!!

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