Exemple #1
0
/* ===================================================================*/
LDD_TDeviceData* I2C2_Init(LDD_TUserData *UserDataPtr)
{
  /* Allocate HAL device structure */
  I2C2_TDeviceData *DeviceDataPrv;
  /* {Default RTOS Adapter} Driver memory allocation: Dynamic allocation is simulated by a pointer to the static object */
  DeviceDataPrv = &DeviceDataPrv__DEFAULT_RTOS_ALLOC;

  DeviceDataPrv->UserData = UserDataPtr; /* Store the RTOS device structure */

  /* Allocate interrupt vector */
  /* {Default RTOS Adapter} Set interrupt vector: IVT is static, ISR parameter is passed by the global variable */
  INT_I2C0__DEFAULT_RTOS_ISRPARAM = DeviceDataPrv;
  DeviceDataPrv->SerFlag = 0x00U;      /* Reset all flags */
  DeviceDataPrv->SendStop = LDD_I2C_SEND_STOP; /* Set variable for sending stop condition (for master mode) */
  DeviceDataPrv->InpLenM = 0x00U;      /* Set zero counter of data of reception */
  DeviceDataPrv->OutLenM = 0x00U;      /* Set zero counter of data of transmission */
  /* SIM_SCGC4: I2C0=1 */
  SIM_SCGC4 |= SIM_SCGC4_I2C0_MASK;
  /* I2C0_C1: IICEN=0,IICIE=0,MST=0,TX=0,TXAK=0,RSTA=0,WUEN=0,DMAEN=0 */
  I2C0_C1 = 0x00U;                     /* Clear control register */
  /* I2C0_FLT: SHEN=0,STOPF=1,STOPIE=0,FLT=0 */
  I2C0_FLT = (I2C_FLT_STOPF_MASK | I2C_FLT_FLT(0x00)); /* Clear bus status interrupt flags */
  /* I2C0_S: TCF=0,IAAS=0,BUSY=0,ARBL=0,RAM=0,SRW=0,IICIF=1,RXAK=0 */
  I2C0_S = I2C_S_IICIF_MASK;           /* Clear interrupt flag */
  /* PORTE_PCR25: ISF=0,MUX=5 */
  PORTE_PCR25 = (uint32_t)((PORTE_PCR25 & (uint32_t)~(uint32_t)(
                 PORT_PCR_ISF_MASK |
                 PORT_PCR_MUX(0x02)
                )) | (uint32_t)(
                 PORT_PCR_MUX(0x05)
                ));
  /* PORTE_PCR24: ISF=0,MUX=5 */
  PORTE_PCR24 = (uint32_t)((PORTE_PCR24 & (uint32_t)~(uint32_t)(
                 PORT_PCR_ISF_MASK |
                 PORT_PCR_MUX(0x02)
                )) | (uint32_t)(
                 PORT_PCR_MUX(0x05)
                ));
  /* NVIC_IPR2: PRI_8=0x80 */
  NVIC_IPR2 = (uint32_t)((NVIC_IPR2 & (uint32_t)~(uint32_t)(
               NVIC_IP_PRI_8(0x7F)
              )) | (uint32_t)(
               NVIC_IP_PRI_8(0x80)
              ));
  /* NVIC_ISER: SETENA|=0x0100 */
  NVIC_ISER |= NVIC_ISER_SETENA(0x0100);
  /* I2C0_C2: GCAEN=0,ADEXT=0,HDRS=0,SBRC=0,RMEN=0,AD=0 */
  I2C0_C2 = I2C_C2_AD(0x00);
  /* I2C0_FLT: SHEN=0,STOPF=0,STOPIE=0,FLT=0 */
  I2C0_FLT = I2C_FLT_FLT(0x00);        /* Set glitch filter register */
  /* I2C0_SMB: FACK=0,ALERTEN=0,SIICAEN=0,TCKSEL=0,SLTF=1,SHTF1=0,SHTF2=0,SHTF2IE=0 */
  I2C0_SMB = I2C_SMB_SLTF_MASK;
  /* I2C0_F: MULT=0,ICR=0 */
  I2C0_F = (I2C_F_MULT(0x00) | I2C_F_ICR(0x00)); /* Set prescaler bits */
  I2C_PDD_EnableDevice(I2C0_BASE_PTR, PDD_ENABLE); /* Enable device */
  I2C_PDD_EnableInterrupt(I2C0_BASE_PTR); /* Enable interrupt */
  /* Registration of the device structure */
  PE_LDD_RegisterDeviceStructure(PE_LDD_COMPONENT_I2C2_ID,DeviceDataPrv);
  return ((LDD_TDeviceData *)DeviceDataPrv); /* Return pointer to the data data structure */
}
Exemple #2
0
void i2c_init (void) {
	/*
	 * this function initializes the I2C bus to use interrupts
	 */
	
	if (i2c_initialize == TRUE) {
		return; // already initialized
	}
	
	memset(&i2c_buf, 0x00, sizeof(i2c_buf));
	
	/* SIM_SCGC4: I2C0=1 */
  SIM_SCGC4 |= SIM_SCGC4_I2C0_MASK;                                                   
  /* I2C0_C1: IICEN=0,IICIE=0,MST=0,TX=0,TXAK=0,RSTA=0,WUEN=0,DMAEN=0 */
  I2C0_C1 = 0x00U;                     /* Clear control register */
  /* I2C0_FLT: SHEN=0,STOPF=1,STOPIE=0,FLT=0 */
  I2C0_FLT = I2C_FLT_STOPF_MASK;       /* Clear bus status interrupt flags */
  /* I2C0_S: TCF=0,IAAS=0,BUSY=0,ARBL=0,RAM=0,SRW=0,IICIF=1,RXAK=0 */
  I2C0_S = I2C_S_IICIF_MASK;           /* Clear interrupt flag */
  /* PORTB_PCR1: ISF=0,MUX=2 */
  PORTB_PCR1 = (uint32_t)((PORTB_PCR1 & (uint32_t)~(uint32_t)(
                PORT_PCR_ISF_MASK |
                PORT_PCR_MUX(0x05)
               )) | (uint32_t)(
                PORT_PCR_MUX(0x02)
               ));                                                  
  /* PORTB_PCR0: ISF=0,MUX=2 */
  PORTB_PCR0 = (uint32_t)((PORTB_PCR0 & (uint32_t)~(uint32_t)(
                PORT_PCR_ISF_MASK |
                PORT_PCR_MUX(0x05)
               )) | (uint32_t)(
                PORT_PCR_MUX(0x02)
               ));                                                  
  /* NVIC_IPR2: PRI_8=0x80 */
  NVIC_IPR2 = (uint32_t)((NVIC_IPR2 & (uint32_t)~(uint32_t)(
               NVIC_IP_PRI_8(0x7F)
              )) | (uint32_t)(
               NVIC_IP_PRI_8(0x80)
              ));                                                  
  /* NVIC_ISER: SETENA|=0x0100 */
  NVIC_ISER |= NVIC_ISER_SETENA(0x0100);                                                   
  /* I2C0_C2: GCAEN=0,ADEXT=0,HDRS=0,SBRC=0,RMEN=0,AD=0 */
  I2C0_C2 = 0x00U;                                                   
  /* I2C0_FLT: SHEN=0,STOPF=0,STOPIE=0,FLT=0 */
  I2C0_FLT = 0x00U;                    /* Set glitch filter register */
  /* I2C0_SMB: FACK=0,ALERTEN=0,SIICAEN=0,TCKSEL=0,SLTF=1,SHTF1=0,SHTF2=0,SHTF2IE=0 */
  I2C0_SMB = I2C_SMB_SLTF_MASK;                                                   
  /* I2C0_F: MULT=0,ICR=2 */
  //I2C0_F = I2C_F_ICR(0x02);            /* Set prescaler bits */
        /* I2C0_F: MULT=0,ICR=F = /68 p.706 of http://cache.freescale.com/files/32bit/doc/ref_manual/KL25P80M48SF0RM.pdf */
  I2C0_F = I2C_F_ICR(0x02); //I2C_F_ICR(0x0F);            /* Set prescaler bits */
	
	//I2C_PDD_EnableDevice(I2C0_BASE_PTR, PDD_ENABLE); /* Enable device */ #define PDD_ENABLE  1u
	/* Enable I2C device */
	I2C_C1_REG(I2C0_BASE_PTR) = (uint_8) ((I2C_C1_REG(I2C0_BASE_PTR) & ~I2C_C1_IICEN_MASK | 1u << I2C_C1_IICEN_SHIFT)); // TODO: fix this, I am pretty sure |= will work
	
  //I2C_PDD_EnableInterrupt(I2C0_BASE_PTR); /* Enable interrupt */
	I2C_C1_REG(I2C0_BASE_PTR) |= I2C_C1_IICIE_MASK;	
	i2c_initialize = TRUE;
}