updated_tpu_nitc.c

mpc564 时钟中断 时钟中断

void tpu_nitc_init_parameter_mode(struct TPU3_tag *tpu, UINT8 channel, \
UINT8 priority, UINT8 detect_edge, INT16 max_count, \
UINT8 single_continuous_operation, \
UINT8 parameter_address, UINT8 nolink_link, UINT8 start_link_channel, \
UINT8 link_channel_count, UINT8 nointerrupt_interrupt)
{

   	/* disable channel so channel can be configured safely 			*/
    	tpu_disable( tpu, channel);
    
   	/* select NITC function for channel 						*/
    	tpu_func( tpu, channel, TPU_FUNCTION_NITC);
    
    	/* Initialize parameter RAM                                      		*/
	/* setup channel as input, tcr capture, and edge detect			*/
    	tpu->PARM.R[channel][TPU_NITC_CHANNEL_CONTROL] = \
	((detect_edge << 2) | (0x3));

    	tpu->PARM.R[channel][TPU_NITC_CHANNEL_ATTRIBUTES] = \
	((start_link_channel << 12) | (link_channel_count << 8) \
	| (parameter_address));

   	tpu->PARM.R[channel][TPU_NITC_MAX_COUNT] = max_count;
	
	/* Configure channel for single or continuous operation                 */
    	/* Configure channel for no linking or linking                          */
    	tpu_hsq(tpu, channel, ((nolink_link << 1) | single_continuous_operation));

	/* If nointerrupt_interupt flag is set enable interrupts			*/
	if(nointerrupt_interrupt) {
		tpu_interrupt_enable(tpu, channel);
	}
        
    	/* Initialize channel */
    	tpu_hsr(tpu, channel, TPU_NITC_INIT_PARAMETER);


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




/*******************************************************************************
FUNCTION      : 			tpu_nitc_write_max_count 
PURPOSE       : 			To allow update of parameter max_count

INPUTS NOTES  : This function has 3 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 channel that 						will perform the nitc function.

               

			max_count - This defines the maximum number of transitions to 					be detected.  When max_count transitions have been 					detected either an interrupt may be generated, and 					or a message sent to other channels via a link 						mechanism.

			

RETURNS NOTES : 	none
WARNING       : 	none


*******************************************************************************/
void tpu_nitc_write_max_count(struct TPU3_tag *tpu, UINT8 channel, \
INT16 max_count)

{

	tpu->PARM.R[channel][TPU_NITC_MAX_COUNT] = max_count; 
}



/*******************************************************************************
FUNCTION      : 			tpu_nitc_write_trans_count 
PURPOSE       : 			To allow update of parameter trans_count

INPUTS NOTES  : This function has 3 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 channel that 						will perform the nitc function.

			trans_count - This is the current count of transisitons that have been detected. 


			

RETURNS NOTES : 	none
WARNING       : 	The trans_count parameter should be written to a value less than the max_count parameter.


*******************************************************************************/
void tpu_nitc_write_trans_count(struct TPU3_tag *tpu, UINT8 channel, \
INT16 trans_count)

{
	tpu->PARM.R[channel][TPU_NITC_TRANS_COUNT] = trans_count; 
}




/*******************************************************************************
FUNCTION      : 			tpu_nitc_read_final_trans_time 
PURPOSE       : 			To allow reading of parameter:
					TPU_NITC_FINAL_TRANS_TIME 

INPUTS NOTES  : This function has 2 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 channel that 						will perform the nitc function.

			 

RETURNS NOTES : 	Returns final transition time or the value pointed to by the parameter address corresponding to the last transition.


WARNING       : 	none

*******************************************************************************/

INT16 tpu_nitc_read_final_trans_time(struct TPU3_tag *tpu, UINT8 channel)

    
{
	return (tpu->PARM.R[channel][TPU_NITC_FINAL_TRANS_TIME]);
}

/*******************************************************************************
FUNCTION      : 			tpu_nitc_read_last_trans_time 
PURPOSE       : 			To allow reading of parameter:
					TPU_NITC_LAST_TRANS_TIME 

INPUTS NOTES  : This function has 2 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 channel that 						will perform the nitc function.

			 

RETURNS NOTES : 	Returns last transition time or last value point to by the parameter address corresponding to the last transition.


WARNING       : 	none

*******************************************************************************/

INT16 tpu_nitc_read_last_trans_time(struct TPU3_tag *tpu, UINT8 channel)

    
{
	return (tpu->PARM.R[channel][TPU_NITC_LAST_TRANS_TIME]);
}



/*******************************************************************************
FUNCTION      : 			tpu_nitc_read_max_count 
PURPOSE       : 			To allow reading of parameter:
					TPU_NITC_MAX_COUNT 

INPUTS NOTES  : This function has 2 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 channel that 						will perform the nitc function.

RETURNS NOTES : 	Returns the max_count value 


WARNING       : 	none


*******************************************************************************/
INT16 tpu_nitc_read_max_count(struct TPU3_tag *tpu, UINT8 channel)

    
{
	return (tpu->PARM.R[channel][TPU_NITC_MAX_COUNT]);
}

/*******************************************************************************
FUNCTION      : 			tpu_nitc_read_trans_count 
PURPOSE       : 			To allow reading of parameter:
					TPU_NITC_TRANS_COUNT 

INPUTS NOTES  : This function has 2 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 channel that 						will perform the nitc function.

RETURNS NOTES : 	Returns the trans_count value 


WARNING       : 	none


*******************************************************************************/
INT16 tpu_nitc_read_trans_count(struct TPU3_tag *tpu, UINT8 channel)

    
{
	return (tpu->PARM.R[channel][TPU_NITC_TRANS_COUNT]);
}


/******************************************************************************/












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