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IIC 死循环

yanmei zou
Prodigy 30 points 
	I2CMasterSlaveAddrSet( I2C1_BASE, 0x50, 0);	
		I2CMasterDataPut( I2C1_BASE, 0x01 );												//写入主机数据(寄存器地址)
		while( I2CMasterErr(I2C1_BASE) | I2CMasterBusy(I2C1_BASE) );
		I2CMasterControl( I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_START );					//主机数据开始传输
        while( I2CMasterErr(I2C1_BASE) | I2CMasterBusy(I2C1_BASE) );
		I2CMasterDataPut( I2C1_BASE, 0x06  );											//写入主机数据(寄存器内容)SysCtlDelay( 5 );
		while( I2CMasterErr(I2C1_BASE) | I2CMasterBusy(I2C1_BASE) );
		I2CMasterControl( I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH );					//主机数据+stop传输
		while( I2CMasterErr(I2C1_BASE) | I2CMasterBusy(I2C1_BASE) );

为什么程序一直停在while呢？

  • 0
    Guru 65885 points

    自己看了看你的寄存器，还是觉得是你初始化的问题。

  • 0 回复 xyz549040622
    Guru 20297 points

    从这里得不到能够判断原因的信息，至少要把完整的模块放上来

  • 0 回复 rookiecalf
    Prodigy 70 points

    Myi2cMaster_Init( I2C_BASE, GPIO_PORTG_BASE, 100000 );

    void Myi2cMaster_Init(uint32_t ui32Base, uint32_t PortBase, 
						uint32_t ui32SCLFreq)
{
    ASSERT(_I2CBaseValid(ui32Base));
	uint32_t SCLGPIO_Pin, SDAGPIO_Pin, SCLPinConfig, SDAPinConfig;
	switch( ui32Base )
	{
		case I2C0_BASE:		
			SCLPinConfig		= GPIO_PB2_I2C0SCL;
			SDAPinConfig		= GPIO_PB3_I2C0SDA;
			SCLGPIO_Pin			= GPIO_PIN_2;
			SDAGPIO_Pin			= GPIO_PIN_3;
			SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
			SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
			break;
		case I2C1_BASE:		
			SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C1);
			if( PortBase == GPIO_PORTG_BASE )
			{
				SCLPinConfig		= GPIO_PG0_I2C1SCL;
				SDAPinConfig		= GPIO_PG1_I2C1SDA;
				SCLGPIO_Pin			= GPIO_PIN_0;
				SDAGPIO_Pin			= GPIO_PIN_1;
				SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
			}
			else
			{
				SCLPinConfig		= GPIO_PR0_I2C1SCL;
				SDAPinConfig		= GPIO_PR1_I2C1SDA;
				SCLGPIO_Pin			= GPIO_PIN_0;
				SDAGPIO_Pin			= GPIO_PIN_1;
				SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOR);
			}
				break;
		case I2C2_BASE:
			SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C2);
			SCLPinConfig		= GPIO_PG2_I2C2SCL;
			SDAPinConfig		= GPIO_PG3_I2C2SDA;
			SCLGPIO_Pin			= GPIO_PIN_2;
			SDAGPIO_Pin			= GPIO_PIN_3;
			SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
			break;
		case I2C3_BASE:		
			SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C3);
			if( PortBase == GPIO_PORTG_BASE )
			{
				SCLPinConfig		= GPIO_PG4_I2C3SCL;
				SDAPinConfig		= GPIO_PG5_I2C3SDA;
				SCLGPIO_Pin			= GPIO_PIN_4;
				SDAGPIO_Pin			= GPIO_PIN_5;
				SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
			}
			else
			{
				SCLPinConfig		= GPIO_PR4_I2C3SCL;
				SDAPinConfig		= GPIO_PR5_I2C3SDA;
				SCLGPIO_Pin			= GPIO_PIN_4;
				SDAGPIO_Pin			= GPIO_PIN_5;
				SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOR);
			}
			break;
		case I2C4_BASE:
			SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C4);
			SCLPinConfig		= GPIO_PG6_I2C4SCL;
			SDAPinConfig		= GPIO_PG7_I2C4SDA;
			SCLGPIO_Pin			= GPIO_PIN_6;
			SDAGPIO_Pin			= GPIO_PIN_7;
			SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
			break;
		case I2C5_BASE:
			SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C5);
			SCLPinConfig		= GPIO_PB0_I2C5SCL;
			SDAPinConfig		= GPIO_PB1_I2C5SDA;
			SCLGPIO_Pin			= GPIO_PIN_0;
			SDAGPIO_Pin			= GPIO_PIN_1;
			SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
			break;
	}
	
	GPIOPinConfigure( SCLPinConfig );
	GPIOPinConfigure( SDAPinConfig );
	GPIOPinTypeI2CSCL( PortBase, SCLGPIO_Pin );
	GPIOPinTypeI2C( PortBase, SDAGPIO_Pin );
	
	I2CMasterPrivateInit( ui32Base, ui32SysClock, ui32SCLFreq);
	I2CMasterEnable( ui32Base );
}

这是初始化配置
  • 0 回复 Sparrow
    Guru 20297 points

    Myi2cMaster_Init( I2C_BASE, GPIO_PORTG_BASE, 100000 );中的I2C_BASE和你用的I2C1_BASE一致不，可以debug看一下是否进行了对应的I2C设置

  • 0 回复 rookiecalf
    Guru 65885 points

    看的好仔细。估计就是这里的问题了。