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223
v120/DSP2833x_examples/ecap_apwm/Example_2833xECap_apwm.c
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223
v120/DSP2833x_examples/ecap_apwm/Example_2833xECap_apwm.c
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// TI File $Revision: /main/10 $
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// Checkin $Date: April 21, 2008 15:41:24 $
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//###########################################################################
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//
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// FILE: Example_2833xECap_apwm.c
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//
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// TITLE: DSP2833x ECAP APWM Example
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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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// Monitor eCAP1 - eCAP4 pins on a oscilloscope as
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// described below.
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//
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// eCAP1 on GPIO24
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// eCAP2 on GPIO7
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// eCAP3 on GPIO9
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// eCAP4 on GPIO11
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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 program sets up the eCAP pins in the APWM mode.
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// This program runs at 150 MHz SYSCLKOUT assuming a 30 MHz
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// XCLKIN or 100 MHz SYSCLKOUT assuming a 20 MHz XCLKIN.
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//
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// For 150 MHz devices:
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//
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// eCAP1 will come out on the GPIO24 pin
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// This pin is configured to vary between 7.5 Hz and 15 Hz using
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// the shadow registers to load the next period/compare values
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//
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// eCAP2 will come out on the GPIO7 pin
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// this pin is configured as a 7.5 Hz output
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//
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// eCAP3 will come out on the GPIO9 pin
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// this pin is configured as a 1.5 Hz output
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//
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//
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// eCAP4 will come out on the GPIO11 pin
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// this pin is configured as a 30 kHz output
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//
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// All frequencies assume a 30 Mhz input clock. The XCLKOUT pin
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// should show 150Mhz.
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// --------------------------------------------------------------
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// For 100 MHz devices:
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//
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// eCAP1 will come out on the GPIO24 pin
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// This pin is configured to vary between 5 Hz and 10 Hz using
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// the shadow registers to load the next period/compare values
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//
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// eCAP2 will come out on the GPIO7 pin
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// this pin is configured as a 5 Hz output
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//
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// eCAP3 will come out on the GPIO9 pin
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// this pin is configured as a 1 Hz output
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//
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// eCAP4 will come out on the GPIO11 pin
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// this pin is configured as a 20kHz output
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//
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// All frequencies assume a 20 Mhz input clock. The XCLKOUT pin
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// should show 100Mhz.
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//
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//
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// Watch Variables:
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//
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//
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//
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//###########################################################################
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// Original Author: D.F.
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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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// Global variables
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Uint16 direction = 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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// Initialize the GPIO pins for eCAP.
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// This function is found in the DSP2833x_ECap.c file
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InitECapGpio();
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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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// No interrupts used for this example.
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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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// Step 5. User specific code
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// Setup APWM mode on CAP1, set period and compare registers
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ECap1Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
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ECap1Regs.CAP1 = 0x01312D00; // Set Period value
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ECap1Regs.CAP2 = 0x00989680; // Set Compare value
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ECap1Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
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ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
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// Setup APWM mode on CAP2, set period and compare registers
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ECap2Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
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ECap2Regs.CAP1 = 0x01312D00; // Set Period value
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ECap2Regs.CAP2 = 0x00989680; // Set Compare value
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ECap2Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
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ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
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// Setup APWM mode on CAP3, set period and compare registers
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ECap3Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
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ECap3Regs.CAP1 = 0x05F5E100; // Set Period value
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ECap3Regs.CAP2 = 0x02FAF080; // Set Compare value
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ECap3Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
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ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
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// Setup APWM mode on CAP4, set period and compare registers
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ECap4Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
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ECap4Regs.CAP1 = 0x00001388; // Set Period value
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ECap4Regs.CAP2 = 0x000009C4; // Set Compare value
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ECap4Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
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ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
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// Start counters
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ECap1Regs.ECCTL2.bit.TSCTRSTOP = 1;
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ECap2Regs.ECCTL2.bit.TSCTRSTOP = 1;
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ECap3Regs.ECCTL2.bit.TSCTRSTOP = 1;
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ECap4Regs.ECCTL2.bit.TSCTRSTOP = 1;
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for(;;)
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{
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// set next duty cycle to 50%
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ECap1Regs.CAP4 = ECap1Regs.CAP1 >> 1;
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// vary freq between 7.5 Hz and 15 Hz (for 150MHz SYSCLKOUT) 5 Hz and 10 Hz (for 100 MHz SYSCLKOUT)
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if(ECap1Regs.CAP1 >= 0x01312D00)
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{
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direction = 0;
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} else if (ECap1Regs.CAP1 <= 0x00989680)
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{
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direction = 1;
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}
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if(direction == 0)
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{
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ECap1Regs.CAP3 = ECap1Regs.CAP1 - 500000;
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} else
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{
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ECap1Regs.CAP3 = ECap1Regs.CAP1 + 500000;
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}
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}
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}
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//===========================================================================
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// No more.
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//===========================================================================
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39
v120/DSP2833x_examples/ecap_apwm/Example_2833xECap_apwm.gel
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39
v120/DSP2833x_examples/ecap_apwm/Example_2833xECap_apwm.gel
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/*
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// TI File $Revision: /main/5 $
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// Checkin $Date: August 9, 2007 17:13:02 $
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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 Asym PWM"
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hotmenu Load_and_Build_Project()
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{
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GEL_ProjectLoad("Example_2833xECap_apwm.pjt");
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GEL_ProjectBuild("Example_2833xECap_apwm.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_apwm.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("ECap1Regs,x");
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}
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46
v120/DSP2833x_examples/ecap_apwm/Example_2833xECap_apwm.pjt
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46
v120/DSP2833x_examples/ecap_apwm/Example_2833xECap_apwm.pjt
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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_apwm\"
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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_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_apwm.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_apwm\Debug" -fs"C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\ecap_apwm\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_apwm\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_apwm.map" -o".\Debug\Example_2833xECap_apwm.out" -stack0x380 -w -x -l"rts2800_fpu32.lib"
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["Linker" Settings: "Release"]
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Options=-q -c -o".\Release\Example_2833xECap_apwm.out" -x
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