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发表于 2016-6-14 17:00:10
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不好意思，说错了，源码已经提供了，我测试下来 我用的以下代码：
void I2cSlave_GPIO_Init(void)
{
GPIO_InitTypeDef GPIOB_InitStructure;
/* configure I2C1 pins: SCL and SDA ---------------*/
GPIOB_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
GPIOB_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIOB_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOB, &GPIOB_InitStructure);
GPIOB_InitStructure.GPIO_Pin = I2C1_INT_PIN;
GPIOB_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIOB_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//GPIO_Mode_Out_OD
GPIO_Init(GPIOB, &GPIOB_InitStructure);
I2C1_INT_H();
}
void I2C1_NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure and enable I2C1 interrupt ----------------*/
NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void I2C1_Mode_Config(void)
{
I2C_InitTypeDef I2C_InitStructure;
I2C_DeInit(I2C1);
// I2C2configuration
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = I2C_SLAVE_ADDR;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 400000;/*×î¸ß400k*/
/*Enable I2C1 */
I2C_Cmd(I2C1, ENABLE);
I2C_Init(I2C1, &I2C_InitStructure);
I2C_AcknowledgeConfig(I2C1, ENABLE);
I2C1_NVIC_Configuration();
// Enable I2C1 event and buffer interrupt
I2C_ITConfig(I2C1, I2C_IT_EVT | I2C_IT_BUF, ENABLE);
}
void I2C1_Slave_Init()
{
RCC_APB2PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO , ENABLE);
I2cSlave_GPIO_Init();
I2C1_Mode_Config();
I2C1_NVIC_Configuration();
}
中断如下：
volatile uint8_t I2C1_SlaveModeFlag;
volatile uint16_t I2C1_SlaveWriteDataNum;
uint16_t I2C1_SlaveWriteDataIndex;
uint16_t I2C1_SlaveReadDataIndex;
void I2C1_EV_IRQHandler(void)
{
static uint16_t dataIndex = 0;
if(((uint16_t)(I2C1->SR1)&(uint16_t)(0x0002))==0x0002){//Address matched (slave mode)
if(((uint16_t)(I2C1->SR2)&(uint16_t)(0x0004))==0x0004){//Data bytes transmitted
I2C1_SlaveModeFlag = SLAVE_WRITE;
I2C1_SlaveWriteDataIndex = 0;
I2C1->DR = I2C_Slave_Send_Buffer[I2C1_SlaveWriteDataIndex++];//´Ó»ú·¢ËÍģʽÏÂдһ×Ö½ÚÊý¾Ýµ½Êý¾Ý¼Ä´æÆ÷
}else{//Data bytes received
I2C1_SlaveModeFlag = SLAVE_READ;
}
}
if(((uint16_t)(I2C1->SR1)&(uint16_t)(0x0040))==0x0040){//Data register not empty (receivers)
if(I2C1_SlaveModeFlag == SLAVE_READ){
I2C_Slave_Send_Buffer[I2C1_SlaveReadDataIndex+dataIndex++] = I2C1->DR;
}
}
if(((uint16_t)(I2C1->SR1)&(uint16_t)(0x0080))==0x0080){//Data register empty (transmitters)
if(I2C1_SlaveModeFlag == SLAVE_WRITE){
I2C1->DR = I2C_Slave_Send_Buffer[I2C1_SlaveWriteDataIndex++];
}
}
if(((uint16_t)(I2C1->SR1)&(uint16_t)(0x0010))==0x0010){//Stop condition detected
I2C1 ->CR1 = I2C1 ->CR1;
if(I2C1_SlaveModeFlag == SLAVE_WRITE){
I2C1_SlaveWriteDataIndex = 0;
I2C1_INT_H();
}
if(I2C1_SlaveModeFlag == SLAVE_READ){
I2C1_SlaveReadDataIndex += dataIndex;
dataIndex = 0;
}
}
}
但是不知道为什么没有办法进去中断，测试波形发现，从机收到地址之后都没有回ack信号。 |
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