tpu_mcpwm.c

mpc564 时钟中断 时钟中断

            				lower channel numbers than the pair with dead time. 
            priority      : This is the priority to assign the channel.  This parameter should 
            				be assigned the same value as the priority of the associated master 
            				channel.
			period        : This defines the period of the PWM output in TCR1 clocks.
							period < $4000.  The PERIOD parameters of all slaves must have 
							the same value as that of the master that they are referencing	 
			dead_time 	  :	This 8-bit parameter contains the total dead time to be 
							subtracted from the high time of the PWM, specified in TCR1
							clocks. 0 < dead_time < $FF.
		    high_time_ptr : This contains the TPU memory address of the value to be used for 
		    				the	high time of the PWM output waveform.  In order to use the value 
		    				specified by the high time parameter in the slave B center-aligned 
		    				mode initialization call, this pointer should be set to (slave B 
		    				channel * $10) + 1.  For example, if this channel's slave B pair is 
		    				initialized to run on TPU channel 5, then high_time_ptr should be 
		    				initialized to $51 in order to use the high_time value specified in 
		    				the slave B initialization.  When a second CA mode slave pair is being 
		    				used to generate a PWM with dead time, high_time_ptr should be initialized 
		    				to (1st slave B channel * $10) + 3. For example, if the 1st slave B 
		    				channel is initialized to run on TPU channel 5, then high_time_ptr  
		    				should be initialized to $53.   
		    polarity      : This is the polarity of the center mode slave A channel.  This 
		    				parameter should be assigned a value of:INVERTED or NONINVERTED
			master_channel: This is the TPU channel number of the MCPWM master channel.					                          
*********************************************************************************************/
void tpu_mcpwm_slavea_centermode_init(struct TPU3_tag *tpu, UINT8 channel, UINT8 priority,   
                UINT16 period, UINT8 dead_time, UINT8 high_time_ptr, UINT8 polarity, 
                UINT8 master_channel)
{
    UINT8 time_ptr1;
    UINT8 time_ptr2;
    
    /* disable channel so it can be configured safely */
    tpu_disable( tpu, channel);

    /* select MCPWM function */
    tpu_func( tpu, channel, TPU_FUNCTION_MCPWM);
	
	/* select the polarity and assign the correct parameter location*/
	if (polarity == NONINVERTED)
		{
			time_ptr1 = (master_channel << 4) + 4; 
			time_ptr2 = (master_channel << 4) + 6;
		}
	else
		{
			time_ptr1 = (master_channel << 4) + 6;
			time_ptr2 = (master_channel << 4) + 4;
		}	
    
    
    /* Initialize parameter RAM                                             */
    /* - initialize PERIOD, DEAD_TIME, HIGH_TIME_POINTER, RISE_TIME_POINTER */
    /*	 	and FALL_TIME_POINTER to there desired values         			*/
   
    tpu->PARM.R[channel][TPU_SLAVEA_PERIOD] = period;
    tpu->PARM.R[channel][TPU_SLAVEA_DEADTIME_HIGHTIMEPTR] = (INT16) (dead_time << 8) | high_time_ptr;
    tpu->PARM.R[channel][TPU_SLAVEA_TIMEPTR1] = time_ptr1;
    tpu->PARM.R[channel][TPU_SLAVEA_TIMEPTR2] = time_ptr2;

    /* Configure the channel measurement mode */
    tpu_hsq(tpu, channel, TPU_MCPWM_CENTER_SLAVE_A_MODE);

    /* Initialize channel */
    if (polarity == NONINVERTED)
		{
   		tpu_hsr(tpu, channel, TPU_MCPWM_All_OTHERSLAVES);
		}
	else
		{
		tpu_hsr(tpu, channel, TPU_MCPWM_SLAVEA_INVERTED);
		}

    /* Enable channel by assigning a priority */
    tpu_enable(tpu, channel, priority);
}



/****************************************************************************************
FUNCTION      : tpu_mcpwm_slaveb_centermode_init

PURPOSE       : To initialize a TPU channel to run the MCPWM function.

INPUTS NOTES  : This function has 6 parameters:

          *tpu            : This is a pointer to the TPU3 module to use. It is of type 
            				TPU3_tag which is defined in m_tpu3.h.
          channel         : This is the TPU channel number of the MCPWM slave B center-aligned 
          					channel.  This parameter must be assigned a higher value than 
          					the channel number of the associated master channel.  In CA mode, 
          					the slave A channel of a pair must be assigned a lower channel number 
          					than the slave B channel.  
          priority        : This is the priority to assign the channel.  This parameter 
          					should be assigned the same value as the priority of the 
          					associated master channel.
		  high_time 	  :	This 8-bit parameter contains the total dead time to be 
							subtracted from the high time of the PWM, specified in TCR1
							clocks. 0 < dead_time < $FF.
		  polarity        : This is the polarity of the center mode slave B channel.  This 
		    				parameter should be assigned a value of:INVERTED or NONINVERTED
		    				This value should be set to the same polarity as that of the 
		    				slave A channel they are referencing.
		  slave_a_channel : This is the TPU channel number of the MCPWM slave A center-aligned 
		  					channel that the slave B is referencing.					 
*******************************************************************************************/
void tpu_mcpwm_slaveb_centermode_init(struct TPU3_tag *tpu, UINT8 channel, UINT8 priority,   
                UINT16 high_time, UINT8 polarity, UINT8 slave_a_channel)
{

    UINT8 b_time_ptr1;
    UINT8 b_time_ptr2;
    
    /* disable channel so it can be configured safely */
    tpu_disable( tpu, channel);

    /* select MCPWM function */
    tpu_func( tpu, channel, TPU_FUNCTION_MCPWM);

	/* select the polarity and assign the correct parameter location*/
		if (polarity == NONINVERTED)
			{
			b_time_ptr1 = (slave_a_channel << 4) + 4; 
			b_time_ptr2 = (slave_a_channel << 4) + 2;
			}
		else
			{
			b_time_ptr1 = (slave_a_channel << 4) + 2;
			b_time_ptr2 = (slave_a_channel << 4) + 4;
			}	
    /* Initialize parameter RAM                                             */
    /* - initialize HIGH_TIME, B_FALL_TIME_POINTER, B_RISE_TIME_POINTER		*/
    /*	 to their desired values         									*/

    tpu->PARM.R[channel][TPU_SLAVEB_HIGHTIME] = high_time;
    tpu->PARM.R[channel][TPU_SLAVEB_BFALLTIMEPTR] = b_time_ptr1;
    tpu->PARM.R[channel][TPU_SLAVEB_BRISETIMEPTR] = b_time_ptr2;
   
    /* Configure the channel measurement mode */
    tpu_hsq(tpu, channel, TPU_MCPWM_CENTER_SLAVE_B_MODE);

    /* Initialize channel */
    tpu_hsr(tpu, channel, TPU_MCPWM_All_OTHERSLAVES);

    /* Enable channel by assigning a priority */
    tpu_enable(tpu, channel, priority);
}


/****************************************************************************************
FUNCTION      : tpu_mcpwm_update_hightime

PURPOSE       : To update a TPU channel running a MCPWM function.

INPUTS NOTES  : This function has 4 parameters:

            *tpu      : This is a pointer to the TPU3 module to use. It is of type 
            			TPU3_tag which is defined in m_tpu3.h.
            channel   : This is the channel number of the MCPWM channel. 
            high_time : This is specified in TCR1 clocks over the range 0 to PERIOD, 
					  	representing 0 to 100% duty cycle.
			mode 	  : This is the mode of the update hightime function.  This parameter 
						should be assigned a value of : EDGE or CENTER				  
*******************************************************************************************/
void tpu_mcpwm_update_hightime(struct TPU3_tag *tpu, UINT8 channel, UINT16 high_time, UINT8 mode)

{
    /* Initialize parameter RAM  */
    /* - update HIGH_TIME to its desired values */
    
	if (mode == EDGE)
		{
    		tpu->PARM.R[channel][TPU_SLAVE_HIGHTIME] = high_time; 
		}
	else
		{
    		tpu->PARM.R[channel][TPU_SLAVEB_HIGHTIME] = high_time;
		}
	   
}