📄 ev.c
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/**********************************************************************
* File: Ev.c -- File Labs 4, 5, and 6
* Devices: TMS320F2812, TMS320F2811, TMS320F2810
* Author: Technical Training Organization (TTO), Texas Instruments
* History:
* 07/01/04 - original (based on DSP281x header files v1.00)
**********************************************************************/
#include "DSP281x_Device.h"
//#include "lab.h"
/*** Global variables used by InitEv() ***/
//#define ADC_sample_period 2999 // 2999 = 50KHz sampling w/ 150MHz CPUCLK
//#define PWM_half_period 37500 // period/2 for 2kHz symmetric PWM
//#define PWM_duty_cycle 28125 // 25% duty cycle
/**********************************************************************
* Function: InitEv()
*
* Description: Initializes the Event Managers
**********************************************************************/
void InitEv(void)
{
/**************************************/
/*** Configure the EXTCON registers ***/
/**************************************/
EvaRegs.EXTCONA.all = 0x0001;
/*
bit 15-4 0's: reserved
bit 3 0: EVSOCE, 0 = disable EV start of ADC conversion output
bit 2 0: QEPIE, 0 = disable CAP3_QEPI as index input
bit 1 0: QEPIQUAL, 0 = CAP3_QEPI qual disabled
bit 0 1: INDCOE, 1 = independent compare enable
*/
EvbRegs.EXTCONB.all = 0x0001;
/*
bit 15-4 0's: reserved
bit 3 0: EVSOCE, 0 = disable EV start of ADC conversion output
bit 2 0: QEPIE, 0 = disable CAP6_QEPI as index input
bit 1 0: QEPIQUAL, 0 = CAP6_QEPI qual disabled
bit 0 1: INDCOE, 1 = independent compare enable
*/
/******************************************************/
/*** Disable and clear all event manager interrupts ***/
/******************************************************/
EvaRegs.EVAIMRA.all = 0x0000; // Disable all EVA group A interrupts
EvaRegs.EVAIMRB.all = 0x0000; // Disable all EVA group B interrupts
EvaRegs.EVAIMRC.all = 0x0000; // Disable all EVA group C interrupts
EvaRegs.EVAIFRA.all = 0xFFFF; // Clear all EVA group A interrupts
EvaRegs.EVAIFRB.all = 0xFFFF; // Clear all EVA group B interrupts
EvaRegs.EVAIFRC.all = 0xFFFF; // Clear all EVA group C interrupts
EvbRegs.EVBIMRA.all = 0x0000; // Disable all EVB group A interrupts
EvbRegs.EVBIMRB.all = 0x0000; // Disable all EVB group B interrupts
EvbRegs.EVBIMRC.all = 0x0000; // Disable all EVB group C interrupts
EvbRegs.EVBIFRA.all = 0xFFFF; // Clear all EVB group A interrupts
EvbRegs.EVBIFRB.all = 0xFFFF; // Clear all EVB group B interrupts
EvbRegs.EVBIFRC.all = 0xFFFF; // Clear all EVB group C interrupts
/**************************************/
/*** Configure the GPTCONA register ***/
/**************************************/
// EvaRegs.GPTCONA.all = 0x0400;
/*
bit 15 0: reserved
bit 14 0: T2STAT, read-only
bit 13 0: T1STAT, read-only
bit 12 0: T2CTRIPE, 0=disable timer2 compare trip
bit 11 0: T1CTRIPE, 0=disable timer1 compare trip
bit 10-9 10: T2TOADC, 10 = timer2 period flag starts ADC
bit 8-7 00: T1TOADC
bit 6 0: TCOMPOE, 0 = Hi-z all timer compare outputs
bit 5 0: T2COMPOE, 0 = timer2 compare HI-z'd
bit 4 0: T1COMPOE, 0 = timer1 compare HI-z'd
bit 3-2 00: T2PIN, 00 = forced low
bit 1-0 00: T1PIN, 00 = forced low
*/
/************************************************************/
/*** Configure Timer 2 to trigger the ADC at a 50KHz rate ***/
/************************************************************/
// EvaRegs.T2CON.all = 0x0000; // Disable timer
// EvaRegs.T2CNT = 0x0000; // Clear timer counter
// EvaRegs.T2PR = ADC_sample_period; // Set timer period
// EvaRegs.T2CON.all = 0x1040; //enable timer
/*
bit 15-14 00: FREE/SOFT, 00 = stop immediately on emulator suspend
bit 13 0: reserved
bit 12-11 10: TMODEx, 10 = continuous-up count mode
bit 10-8 000: TPSx, 111 = x/1 prescaler
bit 7 0: T2SWT1, 0 = use own TENABLE bit
bit 6 1: TENABLE, 1 = enable timer
bit 5-4 00: TCLKS, 00 = HSPCLK is clock source
bit 3-2 00: TCLD, 00 = reload compare reg on underflow
bit 1 0: TECMPR, 0 = enable timer compare
bit 0 0: SELT1PR, 0 = use own period register
*/
/************************************************************/
/*** Configure Timer 1 for 2KHz symmetric PWM on PWM1 pin ***/
/************************************************************/
// EvaRegs.T1CON.all = 0x0000; // Disable timer
// EvaRegs.T1CNT = 0x0000; // Clear timer counter
// EvaRegs.T1PR = PWM_half_period; // Set timer period
// EvaRegs.DBTCONA.all = 0x0000; // Deadband units off
// EvaRegs.CMPR1 = PWM_duty_cycle; // Set PWM1 duty cycle
// EvaRegs.ACTRA.all = 0x0002; // PWM1 set for active high
/*
bit 15 0: SVDIR, space vector dir is CCW (don't care)
bit 14-12 000: D2-D0, basic space vector is 000 (dont' care)
bit 11-10 00: CMP6ACTx, PWM6/GPIOA5 pin forced low
bit 9-8 00: CMP5ACTx, PWM5/GPIOA4 pin forced low
bit 7-6 00: CMP4ACTx, PWM4/GPIOA3 pin forced low
bit 5-4 00: CMP3ACTx, PWM3/GPIOA2 pin forced low
bit 3-2 00: CMP2ACTx, PWM2/GPIOA1 pin forced low
bit 1-0 10: CMP1ACTx, PWM1/GPIOA0 pin active high
*/
// EvaRegs.COMCONA.all = 0x8020; // Init COMCONA
/*
bit 15 1: CENABLE, 1 = enable full compare operation
bit 14-13 00: CLDx, 00 = reload CMPRx regs on timer 1 underflow
bit 12 0: SVENABLE, 0 = space vector disabled
bit 11-10 00: ACTRLDx, 00 = reload ACTR on timer 1 underflow
bit 9 0: FCMPOE, 1 = enable PWM pins
bit 8 0: PDPINT, PDPINT status (read-only)
bit 7 0: FCMP3OE, compare 3 enable (1=enable)
bit 6 0: FCMP2OE, compare 2 enable (1=enable)
bit 5 1: FCMP1OE, compare 1 enable (1=enable)
bit 4-3 00: reserved
bit 2 0: C3TRIPE, compare 3 trip enable (1=enable)
bit 1 0: C2TRIPE, compare 2 trip enable (1=enable)
bit 0 0: C1TRIPE, compare 1 trip enable (1=enable)
*/
// EvaRegs.T1CON.all = 0x0840; // Init T1CON, enable timer
/*
bit 15-14 00: FREE/SOFT, 00 = stop immediately on emulator suspend
bit 13 0: reserved
bit 12-11 01: TMODEx, 01 = continous-up/down count mode
bit 10-8 000: TPSx, 000 = x/1 prescaler
bit 7 0: T2SWT1, 0 = use own TENABLE bit
bit 6 1: TENABLE, 1 = enable timer
bit 5-4 00: TCLKS, 00 = CPUCLK is clock source
bit 3-2 00: TCLD, 00 = reload compare reg on underflow
bit 1 0: TECMPR, 0 = disable timer compare
bit 0 0: SELT1PR, 0 = use own period register
*/
/****************************/
/*** Setup Capture unit 1 ***/
/****************************/
// EvaRegs.CAPCONA.all = 0x0000; // reset the capture units
/*
bit 15 0: CAPRES, 0 = reset the capture units and registers
*/
// EvaRegs.CAPCONA.all = 0xA2C0; // Init CAPCONA register
/*
bit 15 1: CAPRES, 1 = no action
bit 14-13 01: CAP12EN, 01 = enable CAP1 and CAP2, QEP disabled
bit 12 0: CAP3EN, 0 = disable CAP3
bit 11 0: reserved
bit 10 0: CAP3TSEL, CAP3 uses: 0=timer2, 1=timer1
bit 9 1: CAP12TSEL, CAP1 and CAP2 use: 0=timer2, 1=timer1
bit 8 0: CAP3TOADC, 0 = CAP3 does not start ADC
bit 7-6 11: CAP1EDGE, 11 = CAP1 detects both rising and falling edges
bit 5-4 00: CAP2EDGE, 00 = CAP2 no detection
bit 3-2 00: CAP3EDGE, 00 = CAP3 no detection
bit 1-0 00: reserved
*/
// EvaRegs.EVAIMRC.bit.CAP1INT = 1; // Enable CAPINT1
// PieCtrlRegs.PIEIER3.bit.INTx5 = 1; // Enable CAPINT1 in PIE group 3
// IER |= 0x0004; // Enable INT3 in IER to enable PIE group 3
} // end InitEv()
/*** end of file *****************************************************/
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