Exemplo n.º 1
0
//configure I2C
void BMP180_init(void) {
   P8OUT |= BIT4;             //set SW_I2C high to power on all I2C chips
   __delay_cycles(24000000);  //wait 1s (assuming 24MHz MCLK) to allow for power ramp up

   I2C_Master_Init(S_MCLK,24000000,400000);  //Source from SMCLK, which is running @ 24MHz. 4kHz desired BRCLK
                                             //max is 3.4MHz
}
Exemplo n.º 2
0
void I2CMaster_TX(I2C_TypeDef *I2Cx)
{
	unsigned int tempClear = 0x0;
	unsigned int i;
	I2C_Master_Init(I2Cx);
	for(i=0;i<10;i++)
	{
		I2Cx->IC_DATA_CMD = 0x00aa + i;
	//I2C->IC_DATA_CMD = 0xaa;
		while(1)
		{
					if((I2Cx->IC_RAW_INTR_STAT & 0x0010)==0x0010)//tx_empty=1
						break;
		}
		//uart_printf("tx 0k\r\n");
   }	
	
	while(1)
		{
			if((I2Cx->IC_STATUS & 0x20)==0x20)//MST-ACTIVITY=0 check idle 
            break;
		}
	  while(1)
    {
        if((I2Cx->IC_RAW_INTR_STAT & 0x0200)==0x0200)//stop flag detect
				tempClear = I2Cx->IC_CLR_STOP_DET;  //read this reg clear stop flag
        break;
    }	
}
Exemplo n.º 3
0
/* I2C Slave with Interrupt Init */
void I2C_SlaveWithInterrupt_Init(I2C_TypeDef* I2Cx, uint32_t freq, int SlaveAddr, pin_t scl, pin_t sda){
	NVIC_InitTypeDef i2c_slave_nvic;
	uint8_t _i2c_er_irq;
	
	I2C_Master_Init(I2Cx, freq, scl, sda);
	I2C_Slave_Mode(I2Cx, 1);
	I2C_Slave_Address(I2Cx, SlaveAddr);
	
	/* Configure the Priority Group to 1 bit */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	if(I2Cx == I2C1){
		_i2c_er_irq = I2C1_ER_IRQn;
		i2c_slave_nvic.NVIC_IRQChannel = I2C1_EV_IRQn;
	}else if(I2Cx == I2C2){
		_i2c_er_irq = I2C2_ER_IRQn;
		i2c_slave_nvic.NVIC_IRQChannel = I2C2_EV_IRQn;
	}
	i2c_slave_nvic.NVIC_IRQChannelPreemptionPriority = 1;
  i2c_slave_nvic.NVIC_IRQChannelSubPriority = 0;
  i2c_slave_nvic.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&i2c_slave_nvic);
	
	i2c_slave_nvic.NVIC_IRQChannel = _i2c_er_irq;
	NVIC_Init(&i2c_slave_nvic);
	
	/* Enable Error Interrupt */
  I2C_ITConfig(I2Cx, (I2C_IT_ERR | I2C_IT_EVT | I2C_IT_BUF), ENABLE);
}
Exemplo n.º 4
0
void I2CMaster_RX(I2C_TypeDef *I2Cx)
{
	unsigned int tempClear = 0x0;
	unsigned int i;
	unsigned int rxdata[10] = {0x0};
	I2C_Master_Init(I2Cx);
	
	for(i=0;i<10;i++)
	{
		I2Cx->IC_DATA_CMD = 0x100;
		while(1)
			{
				 if((I2Cx->IC_RAW_INTR_STAT & 0x0004)==0x0004)
						 break;
			}
			rxdata[i] = I2Cx->IC_DATA_CMD; 
			uart_printf("rxdata%d = 0x%x\r\n",i,rxdata[i]);
	}	
}
Exemplo n.º 5
0
void Main() 
{
  Setup();
  
  I2C_Master_Init();
  
  I2C1_Init(100000);

  while(1){
    I2C1_Start();
    I2C1_Wr(8 << 1);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(100);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Stop();
    
    Delay_ms(500);
    
    I2C1_Start();
    I2C1_Wr(8 << 1);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Wr(0);
    I2C1_Stop();
    
    Delay_ms(500);
  }
}
Exemplo n.º 6
0
/* I2C Slave Init */
void I2C_Slave_Init(I2C_TypeDef* I2Cx, uint32_t freq, int SlaveAddr, pin_t scl, pin_t sda){
	I2C_Master_Init(I2Cx, freq, scl, sda);
	I2C_Slave_Mode(I2Cx, 1);
	I2C_Slave_Address(I2Cx, SlaveAddr);
}