Part Number: TMS320F28335
Other Parts Discussed in Thread: C2000WARE
Example_2833xEcap_apwm doesn't work. Building Errors. Kindly check the console window. Please suggest
//###########################################################################
// Description:
//! \addtogroup f2833x_example_list
//! <h1>eCAP APWM (ecap_epwm)</h1>
//!
//! This program sets up eCAP pins in the APWM mode.
//! This program runs at 150 MHz SYSCLKOUT assuming a 30 MHz
//! XCLKIN or 100 MHz SYSCLKOUT assuming a 20 MHz XCLKIN. \n
//! For 150 MHz devices: \n
//! - eCAP1 will come out on the GPIO24 pin.
//! This pin is configured to vary between 7.5 Hz and 15 Hz using
//! the shadow registers to load the next period/compare values. \n
//! - eCAP2 will come out on the GPIO7 pin.
//! This pin is configured as a 7.5 Hz output. \n
//! - eCAP3 will come out on the GPIO9 pin.
//! This pin is configured as a 1.5 Hz output. \n
//! - eCAP4 will come out on the GPIO11 pin.
//! This pin is configured as a 30 kHz output. \n
//! - All frequencies assume a 30 Mhz input clock. The XCLKOUT pin
//! should show 150Mhz. \n
//!
//! For 100 MHz devices: \n
//! - eCAP1 will come out on the GPIO24 pin.
//! This pin is configured to vary between 5 Hz and 10 Hz using
//! the shadow registers to load the next period/compare values. \n
//! - eCAP2 will come out on the GPIO7 pin.
//! This pin is configured as a 5 Hz output. \n
//! - eCAP3 will come out on the GPIO9 pin.
//! This pin is configured as a 1 Hz output. \n
//! - eCAP4 will come out on the GPIO11 pin.
//! This pin is configured as a 20kHz output. \n
//! - All frequencies assume a 20 Mhz input clock. The XCLKOUT pin
//! should show 100Mhz.
//
//
//###########################################################################
// $TI Release: F2833x/F2823x Header Files and Peripheral Examples V142 $
// $Release Date: November 1, 2016 $
// $Copyright: Copyright (C) 2007-2016 Texas Instruments Incorporated -
// http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
// Global variables
Uint16 direction = 0;
void main(void)
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.
InitSysCtrl();
// Step 2. Initialize GPIO:
// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio(); // Skipped for this example
// Initialize the GPIO pins for eCAP.
// This function is found in the DSP2833x_ECap.c file
InitECapGpio();
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
DINT;
// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2833x_PieCtrl.c file.
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.
InitPieVectTable();
// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
// No interrupts used for this example.
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2833x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
// Step 5. User specific code
// Setup APWM mode on CAP1, set period and compare registers
ECap1Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
ECap1Regs.CAP1 = 0x01312D00; // Set Period value
ECap1Regs.CAP2 = 0x00989680; // Set Compare value
ECap1Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
// Setup APWM mode on CAP2, set period and compare registers
ECap2Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
ECap2Regs.CAP1 = 0x01312D00; // Set Period value
ECap2Regs.CAP2 = 0x00989680; // Set Compare value
ECap2Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
// Setup APWM mode on CAP3, set period and compare registers
ECap3Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
ECap3Regs.CAP1 = 0x05F5E100; // Set Period value
ECap3Regs.CAP2 = 0x02FAF080; // Set Compare value
ECap3Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
// Setup APWM mode on CAP4, set period and compare registers
ECap4Regs.ECCTL2.bit.CAP_APWM = 1; // Enable APWM mode
ECap4Regs.CAP1 = 0x00001388; // Set Period value
ECap4Regs.CAP2 = 0x000009C4; // Set Compare value
ECap4Regs.ECCLR.all = 0x0FF; // Clear pending interrupts
ECap1Regs.ECEINT.bit.CTR_EQ_CMP = 1; // enable Compare Equal Int
// Start counters
ECap1Regs.ECCTL2.bit.TSCTRSTOP = 1;
ECap2Regs.ECCTL2.bit.TSCTRSTOP = 1;
ECap3Regs.ECCTL2.bit.TSCTRSTOP = 1;
ECap4Regs.ECCTL2.bit.TSCTRSTOP = 1;
for(;;)
{
// set next duty cycle to 50%
ECap1Regs.CAP4 = ECap1Regs.CAP1 >> 1;
// vary freq between 7.5 Hz and 15 Hz (for 150MHz SYSCLKOUT) 5 Hz and 10 Hz (for 100 MHz SYSCLKOUT)
if(ECap1Regs.CAP1 >= 0x01312D00)
{
direction = 0;
} else if (ECap1Regs.CAP1 <= 0x00989680)
{
direction = 1;
}
if(direction == 0)
{
ECap1Regs.CAP3 = ECap1Regs.CAP1 - 500000;
} else
{
ECap1Regs.CAP3 = ECap1Regs.CAP1 + 500000;
}
}
}
//===========================================================================
// No more.
//===========================================================================
