tpu_mcpwm_example2.c

mpc564 时钟中断 时钟中断

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/****************************************************************************/
/* FILE NAME: tpu_mcpwm_example2.c            COPYRIGHT (c) MOTOROLA 2002   */
/* VERSION: 1.0                                   All Rights Reserved       */
/*                                                                          */
/* DESCRIPTION: This sample program shows a MCPWM example in center-aligned */
/* mode that generates two PWM pulses with a period of 256 TCR1 clocks,	    */
/* sharing a common HIGH_TIME and suitable for driving an inverter.  The 	*/
/* required DEAD_TIME = 4 and the master channel is on channel 0 while      */
/* channels 1, 2, 3 and 4 are slaves.  Periodic interrupts every 10 PWM		*/
/* periods.  Initialize with a duty cycle of 50%.                           */
/*                                                                        	*/
/* The program is targeted for the MPC555 but should work on any MPC500   	*/
/* device with a TPU. For other devices the setup routines will also need 	*/
/* to be changed.                                                         	*/
/*========================================================================	*/
/* HISTORY           ORIGINAL AUTHOR: Mario Ramiro Perez II               	*/
/*                                                                        	*/
/* REV      AUTHOR         DATE       DESCRIPTION OF CHANGE               	*/
/* ---   -----------     ---------    ---------------------               	*/
/* 1.0   Mario R. Perez  25 Sep 02    Initial version of function.        	*/
/****************************************************************************/

#include "mpc555.h"         /* Define MPC555 registers, this needs to be  	*/
                            /* changed if other MPC500 devices are used.  	*/
#include "mpc500_util.h"    /* Utility routines for using MPC500 devices  	*/
#include "tpu_mcpwm.h"      /* TPU MCPWM functions 						  	*/


void main ()
{
    struct TPU3_tag *tpua = &TPU_A;         /* pointer for TPU routines 	*/

    setup_555();


    /* Initialize MCPWM Master Init function with:  */
    /*    - TPU A Channel 0 set        				*/
    /*    - Priority set to High                    */
    /*    - Period set to 0x100 					*/
    /*    - IRQ Rate set to 0xA                   	*/
tpu_mcpwm_master_init(tpua, 0, TPU_PRIORITY_HIGH, 0x100, 0xA); 

    /* Initialize SlaveA Center Mode (Inverted):    */
    /*    - TPU A Channel 1 set        				*/
    /*    - Priority set to High                    */
    /*    - Period set to 0x100 					*/
    /*    - Dead Time set to 0x0                 	*/
    /*    - High Time Pointer set to 0x21 			*/
    /*    - Polarity is set to Inverted 			*/    
    /*    - Master channel is running on TPU ch 0   */ 
tpu_mcpwm_slavea_centermode_init(tpua, 1, TPU_PRIORITY_HIGH, 0x100, 0x0, 0x21, INVERTED, 0);


    /* Initialize SlaveB Center Mode function with: */
    /*    - TPU A Channel 2 set        				*/
    /*    - Priority set to High                    */
    /*    - High Time set to 0x80                 	*/
    /*    - Polarity is set to Inverted 			*/ 
    /*    - Slave A channel is running on TPU ch 1  */ 
tpu_mcpwm_slaveb_centermode_init(tpua, 2, TPU_PRIORITY_HIGH, 0x80, INVERTED, 1);


    /* Initialize SlaveA Center Mode (Non-Inverted):*/
    /*    - TPU A Channel 3 set        				*/
    /*    - Priority set to High                    */
    /*    - Period set to 0x100 					*/
    /*    - Dead Time set to 0x4                 	*/
    /*    - High Time Pointer set to 0x23			*/
    /*    - Polarity is set to Non-Inverted 		*/
    /*    - Master channel is running on TPU ch 0   */    
tpu_mcpwm_slavea_centermode_init(tpua, 3, TPU_PRIORITY_HIGH, 0x100, 0x4, 0x23, NONINVERTED, 0);


    /* Initialize SlaveB Center Mode function with: */
    /*    - TPU A Channel 4 set        				*/
    /*    - Priority set to High                    */
    /*    - High Time set to 0 (don't care)         */
    /*    - Polarity is set to Non-Inverted 		*/ 
    /*    - Slave A channel is running on TPU ch 3  */
tpu_mcpwm_slaveb_centermode_init(tpua, 4, TPU_PRIORITY_HIGH, 0, NONINVERTED, 3);


tpu_interrupt_enable(tpua, 0);          /* enable MCPWM interrupts */

    while (1) {                             /* loop and measure */
    }
}