init commit.
Проект каким он достался от Димы.
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// TI File $Revision: /main/8 $
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// Checkin $Date: April 21, 2008 15:41:29 $
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//###########################################################################
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//
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// FILE: Example_2833xECap_Capture_Pwm.c
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//
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// TITLE: Capture EPWM3.
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//
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// ASSUMPTIONS:
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//
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// This program requires the DSP2833x header files.
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//
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// Make the following external connection:
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// EPWM3 on GPIO4 should be connected to ECAP1 on GPIO24.
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//
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// As supplied, this project is configured for "boot to SARAM"
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// operation. The 2833x Boot Mode table is shown below.
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// For information on configuring the boot mode of an eZdsp,
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// please refer to the documentation included with the eZdsp,
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//
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// $Boot_Table:
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//
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// GPIO87 GPIO86 GPIO85 GPIO84
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// XA15 XA14 XA13 XA12
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// PU PU PU PU
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// ==========================================
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// 1 1 1 1 Jump to Flash
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// 1 1 1 0 SCI-A boot
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// 1 1 0 1 SPI-A boot
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// 1 1 0 0 I2C-A boot
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// 1 0 1 1 eCAN-A boot
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// 1 0 1 0 McBSP-A boot
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// 1 0 0 1 Jump to XINTF x16
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// 1 0 0 0 Jump to XINTF x32
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// 0 1 1 1 Jump to OTP
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// 0 1 1 0 Parallel GPIO I/O boot
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// 0 1 0 1 Parallel XINTF boot
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// 0 1 0 0 Jump to SARAM <- "boot to SARAM"
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// 0 0 1 1 Branch to check boot mode
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// 0 0 1 0 Boot to flash, bypass ADC cal
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// 0 0 0 1 Boot to SARAM, bypass ADC cal
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// 0 0 0 0 Boot to SCI-A, bypass ADC cal
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// Boot_Table_End$
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//
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// DESCRIPTION:
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//
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// This example configures ePWM3A for:
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// - Up count
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// - Period starts at 2 and goes up to 1000
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// - Toggle output on PRD
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//
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// eCAP1 is configured to capture the time between rising
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// and falling edge of the PWM3A output.
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//
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//###########################################################################
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// $TI Release: DSP2833x/DSP2823x Header Files V1.20 $
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// $Release Date: August 1, 2008 $
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//###########################################################################
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#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
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// Configure the start/end period for the timer
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#define PWM3_TIMER_MIN 10
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#define PWM3_TIMER_MAX 8000
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// Prototype statements for functions found within this file.
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interrupt void ecap1_isr(void);
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void InitECapture(void);
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void InitEPwmTimer(void);
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void Fail(void);
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// Global variables used in this example
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Uint32 ECap1IntCount;
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Uint32 ECap1PassCount;
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Uint32 EPwm3TimerDirection;
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// To keep track of which way the timer value is moving
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#define EPWM_TIMER_UP 1
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#define EPWM_TIMER_DOWN 0
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void main(void)
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{
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// Step 1. Initialize System Control:
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// PLL, WatchDog, enable Peripheral Clocks
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// This example function is found in the DSP2833x_SysCtrl.c file.
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InitSysCtrl();
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// Step 2. Initalize GPIO:
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// This example function is found in the DSP2833x_Gpio.c file and
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// illustrates how to set the GPIO to it's default state.
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// InitGpio(); // Skipped for this example
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InitEPwm3Gpio();
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InitECap1Gpio();
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// Step 3. Clear all interrupts and initialize PIE vector table:
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// Disable CPU interrupts
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DINT;
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// Initialize the PIE control registers to their default state.
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// The default state is all PIE interrupts disabled and flags
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// are cleared.
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// This function is found in the DSP2833x_PieCtrl.c file.
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InitPieCtrl();
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// Disable CPU interrupts and clear all CPU interrupt flags:
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IER = 0x0000;
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IFR = 0x0000;
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// Initialize the PIE vector table with pointers to the shell Interrupt
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// Service Routines (ISR).
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// This will populate the entire table, even if the interrupt
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// is not used in this example. This is useful for debug purposes.
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// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
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// This function is found in DSP2833x_PieVect.c.
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InitPieVectTable();
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// Interrupts that are used in this example are re-mapped to
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// ISR functions found within this file.
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EALLOW; // This is needed to write to EALLOW protected registers
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PieVectTable.ECAP1_INT = &ecap1_isr;
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EDIS; // This is needed to disable write to EALLOW protected registers
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// Step 4. Initialize all the Device Peripherals:
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// This function is found in DSP2833x_InitPeripherals.c
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// InitPeripherals(); // Not required for this example
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InitEPwmTimer(); // For this example, only initialize the ePWM Timers
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InitECapture();
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// Step 5. User specific code, enable interrupts:
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// Initalize counters:
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ECap1IntCount = 0;
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ECap1PassCount = 0;
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// Enable CPU INT4 which is connected to ECAP1-4 INT:
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IER |= M_INT4;
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// Enable eCAP INTn in the PIE: Group 3 interrupt 1-6
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PieCtrlRegs.PIEIER4.bit.INTx1 = 1;
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// Enable global Interrupts and higher priority real-time debug events:
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EINT; // Enable Global interrupt INTM
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ERTM; // Enable Global realtime interrupt DBGM
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// Step 6. IDLE loop. Just sit and loop forever (optional):
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for(;;)
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{
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asm(" NOP");
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}
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}
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void InitEPwmTimer()
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{
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EALLOW;
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SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;
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EDIS;
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EPwm3Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
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EPwm3Regs.TBPRD = PWM3_TIMER_MIN;
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EPwm3Regs.TBPHS.all = 0x00000000;
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EPwm3Regs.AQCTLA.bit.PRD = AQ_TOGGLE; // Toggle on PRD
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// TBCLK = SYSCLKOUT
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EPwm3Regs.TBCTL.bit.HSPCLKDIV = 1;
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EPwm3Regs.TBCTL.bit.CLKDIV = 0;
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EPwm3TimerDirection = EPWM_TIMER_UP;
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EALLOW;
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SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
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EDIS;
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}
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void InitECapture()
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{
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ECap1Regs.ECEINT.all = 0x0000; // Disable all capture interrupts
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ECap1Regs.ECCLR.all = 0xFFFF; // Clear all CAP interrupt flags
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ECap1Regs.ECCTL1.bit.CAPLDEN = 0; // Disable CAP1-CAP4 register loads
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ECap1Regs.ECCTL2.bit.TSCTRSTOP = 0; // Make sure the counter is stopped
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// Configure peripheral registers
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ECap1Regs.ECCTL2.bit.CONT_ONESHT = 1; // One-shot
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ECap1Regs.ECCTL2.bit.STOP_WRAP = 3; // Stop at 4 events
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ECap1Regs.ECCTL1.bit.CAP1POL = 1; // Falling edge
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ECap1Regs.ECCTL1.bit.CAP2POL = 0; // Rising edge
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ECap1Regs.ECCTL1.bit.CAP3POL = 1; // Falling edge
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ECap1Regs.ECCTL1.bit.CAP4POL = 0; // Rising edge
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ECap1Regs.ECCTL1.bit.CTRRST1 = 1; // Difference operation
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ECap1Regs.ECCTL1.bit.CTRRST2 = 1; // Difference operation
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ECap1Regs.ECCTL1.bit.CTRRST3 = 1; // Difference operation
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ECap1Regs.ECCTL1.bit.CTRRST4 = 1; // Difference operation
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ECap1Regs.ECCTL2.bit.SYNCI_EN = 1; // Enable sync in
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ECap1Regs.ECCTL2.bit.SYNCO_SEL = 0; // Pass through
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ECap1Regs.ECCTL1.bit.CAPLDEN = 1; // Enable capture units
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ECap1Regs.ECCTL2.bit.TSCTRSTOP = 1; // Start Counter
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ECap1Regs.ECCTL2.bit.REARM = 1; // arm one-shot
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ECap1Regs.ECCTL1.bit.CAPLDEN = 1; // Enable CAP1-CAP4 register loads
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ECap1Regs.ECEINT.bit.CEVT4 = 1; // 4 events = interrupt
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}
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interrupt void ecap1_isr(void)
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{
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// Cap input is syc'ed to SYSCLKOUT so there may be
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// a +/- 1 cycle variation
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if(ECap1Regs.CAP2 > EPwm3Regs.TBPRD*2+1 || ECap1Regs.CAP2 < EPwm3Regs.TBPRD*2-1)
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{
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Fail();
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}
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if(ECap1Regs.CAP3 > EPwm3Regs.TBPRD*2+1 || ECap1Regs.CAP3 < EPwm3Regs.TBPRD*2-1)
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{
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Fail();
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}
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if(ECap1Regs.CAP4 > EPwm3Regs.TBPRD*2+1 || ECap1Regs.CAP4 < EPwm3Regs.TBPRD*2-1)
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{
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Fail();
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}
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ECap1IntCount++;
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if(EPwm3TimerDirection == EPWM_TIMER_UP)
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{
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if(EPwm3Regs.TBPRD < PWM3_TIMER_MAX)
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{
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EPwm3Regs.TBPRD++;
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}
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else
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{
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EPwm3TimerDirection = EPWM_TIMER_DOWN;
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EPwm3Regs.TBPRD--;
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}
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}
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else
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{
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if(EPwm3Regs.TBPRD > PWM3_TIMER_MIN)
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{
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EPwm3Regs.TBPRD--;
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}
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else
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{
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EPwm3TimerDirection = EPWM_TIMER_UP;
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EPwm3Regs.TBPRD++;
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}
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}
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ECap1PassCount++;
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ECap1Regs.ECCLR.bit.CEVT4 = 1;
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ECap1Regs.ECCLR.bit.INT = 1;
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ECap1Regs.ECCTL2.bit.REARM = 1;
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// Acknowledge this interrupt to receive more interrupts from group 4
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PieCtrlRegs.PIEACK.all = PIEACK_GROUP4;
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}
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void Fail()
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{
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asm(" ESTOP0");
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}
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//===========================================================================
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// No more.
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//===========================================================================
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@@ -0,0 +1,46 @@
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/*
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// TI File $Revision: /main/5 $
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// Checkin $Date: August 9, 2007 17:13:13 $
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//###########################################################################
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//
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// This .gel file can be used to help load and build the example project.
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// It should be unloaded from Code Composer Studio before loading another
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// project.
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//
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//###########################################################################
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// $TI Release: DSP2833x/DSP2823x Header Files V1.20 $
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// $Release Date: August 1, 2008 $
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//###########################################################################
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*/
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menuitem "DSP2833x eCAP Capture PWM"
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hotmenu Load_and_Build_Project()
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{
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GEL_ProjectLoad("Example_2833xECap_Capture_Pwm.pjt");
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GEL_ProjectBuild("Example_2833xECap_Capture_Pwm.pjt");
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Setup_WatchWindow();
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}
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hotmenu Load_Code()
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{
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GEL_Load(".\\debug\\Example_2833xECap_Capture_Pwm.out");
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Setup_WatchWindow();
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}
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hotmenu Setup_WatchWindow()
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{
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GEL_WatchReset();
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GEL_WatchAdd("ECap1IntCount,x");
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GEL_WatchAdd("ECap1PassCount,x");
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GEL_WatchAdd("EPwm3Regs.TBPRD,x");
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GEL_WatchAdd("ECap1Regs.CAP2,x");
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GEL_WatchAdd("ECap1Regs.CAP3,x");
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GEL_WatchAdd("ECap1Regs.CAP4,x");
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GEL_WatchAdd("EPwm3Regs,x");
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GEL_WatchAdd("ECap1Regs,x");
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}
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@@ -0,0 +1,47 @@
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; Code Composer Project File, Version 2.0 (do not modify or remove this line)
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[Project Settings]
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ProjectName="DSP2833x"
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ProjectDir="C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\ecap_capture_pwm\"
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ProjectType=Executable
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CPUFamily=TMS320C28XX
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Tool="Compiler"
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Tool="DspBiosBuilder"
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Tool="Linker"
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Config="Debug"
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Config="Release"
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[Source Files]
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Source="..\..\DSP2833x_common\source\DSP2833x_ADC_cal.asm"
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Source="..\..\DSP2833x_common\source\DSP2833x_CodeStartBranch.asm"
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Source="..\..\DSP2833x_common\source\DSP2833x_CpuTimers.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_DefaultIsr.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_ECap.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_EPwm.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_PieCtrl.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_PieVect.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_SysCtrl.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_usDelay.asm"
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Source="..\..\DSP2833x_headers\source\DSP2833x_GlobalVariableDefs.c"
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Source="Example_2833xECap_Capture_Pwm.c"
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Source="..\..\DSP2833x_common\cmd\28335_RAM_lnk.cmd"
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Source="..\..\DSP2833x_headers\cmd\DSP2833x_Headers_nonBIOS.cmd"
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["Compiler" Settings: "Debug"]
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Options=-g -q -pdr -fr"C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\ecap_capture_pwm\Debug" -fs"C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\ecap_capture_pwm\Debug" -i"..\..\DSP2833x_headers\include" -i"..\..\DSP2833x_common\include" -d"_DEBUG" -d"LARGE_MODEL" --float_support=fpu32 -ml -mt -v28
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["Compiler" Settings: "Release"]
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Options=-q -o3 -fr"C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\ecap_capture_pwm\Release" -d"LARGE_MODEL" -ml -v28
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["DspBiosBuilder" Settings: "Debug"]
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Options=-v28
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["DspBiosBuilder" Settings: "Release"]
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Options=-v28
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["Linker" Settings: "Debug"]
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Options=-q -c -ecode_start -m".\Debug\Example_2833xECap_Capture_Pwm.map" -o".\Debug\Example_2833xECap_Capture_Pwm.out" -stack0x380 -w -x -i"..\..\DSP2833x_headers\include" -l"rts2800_fpu32.lib"
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["Linker" Settings: "Release"]
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Options=-q -c -o".\Release\Example_2833xCpuTimer.out" -x
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