I have an error #10234-D unresolved symbols remain. Apparently undefined symbol problems are in ./main.obj. How can this be resolved?
//###########################################################################
// Description:
//! \addtogroup f2833x_example_list
//! <h1>Timer based blinking LED (timed_led_blink)</h1>
//!
//! This example configures CPU Timer0 for a 500 msec period, and toggles the GPIO32
//! LED on the 2833x eZdsp once per interrupt. For testing purposes, this example
//! also increments a counter each time the timer asserts an interrupt.
//!
//! \b Watch \b Variables \n
//! - CpuTimer0.InterruptCount
//!
//! \b External \b Connections \n
//! - Monitor the GPIO32 LED blink on (for 500 msec) and off (for 500 msec) on
//! the 2833x eZdsp.
//
//###########################################################################
// $TI Release: F2833x/F2823x Header Files and Peripheral Examples V141 $
// $Release Date: November 6, 2015 $
// $Copyright: Copyright (C) 2007-2015 Texas Instruments Incorporated -
// http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
// Prototype statements for functions found within this file.
__interrupt void cpu_timer0_isr(void);
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
// 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.
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.TINT0 = &cpu_timer0_isr;
EDIS; // This is needed to disable write to EALLOW protected registers
// Step 4. Initialize the Device Peripheral. This function can be
// found in DSP2833x_CpuTimers.c
InitCpuTimers(); // For this example, only initialize the Cpu Timers
#if (CPU_FRQ_150MHZ)
// Configure CPU-Timer 0 to interrupt every 500 milliseconds:
// 150MHz CPU Freq, 50 millisecond Period (in uSeconds)
ConfigCpuTimer(&CpuTimer0, 150, 500000);
#endif
#if (CPU_FRQ_100MHZ)
// Configure CPU-Timer 0 to interrupt every 500 milliseconds:
// 100MHz CPU Freq, 50 millisecond Period (in uSeconds)
ConfigCpuTimer(&CpuTimer0, 100, 500000);
#endif
// To ensure precise timing, use write-only instructions to write to the entire register. Therefore, if any
// of the configuration bits are changed in ConfigCpuTimer and InitCpuTimers (in DSP2833x_CpuTimers.h), the
// below settings must also be updated.
CpuTimer0Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0
// Step 5. User specific code, enable interrupts:
// Configure GPIO32 as a GPIO output pin
EALLOW;
GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO32 = 1;
EDIS;
// Enable CPU INT1 which is connected to CPU-Timer 0:
IER |= M_INT1;
// Enable TINT0 in the PIE: Group 1 interrupt 7
PieCtrlRegs.PIEIER1.bit.INTx7 = 1;
// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
// Step 6. IDLE loop. Just sit and loop forever (optional):
for(;;);
}
__interrupt void cpu_timer0_isr(void)
{
CpuTimer0.InterruptCount++;
GpioDataRegs.GPBTOGGLE.bit.GPIO32 = 1; // Toggle GPIO32 once per 500 milliseconds
// Acknowledge this interrupt to receive more interrupts from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
//===========================================================================
// No more.
//===========================================================================
**** Build of configuration Debug for project Blinking Led ****
"c:\\ti\\ccsv6\\utils\\bin\\gmake" -k all
'Building file: ../main.c'
'Invoking: C2000 Compiler'
"c:/ti/ccsv6/tools/compiler/c2000_6.2.7/bin/cl2000" -v28 -ml -mt --float_support=fpu32 --include_path="C:/ti/controlSUITE/device_support/f2833x/v141/DSP2833x_common/include" --include_path="c:/ti/ccsv6/tools/compiler/c2000_6.2.7/include" --include_path="C:/ti/controlSUITE/device_support/f2833x/v141/DSP2833x_headers/include" -g --diag_warning=225 --display_error_number --diag_wrap=off --preproc_with_compile --preproc_dependency="main.pp" "../main.c"
'Finished building: ../main.c'
' '
'Building target: Blinking Led.out'
'Invoking: C2000 Linker'
"c:/ti/ccsv6/tools/compiler/c2000_6.2.7/bin/cl2000" -v28 -ml -mt --float_support=fpu32 -g --diag_warning=225 --display_error_number --diag_wrap=off -z -m"Blinking Led.map" --stack_size=0x300 --warn_sections -i"c:/ti/ccsv6/tools/compiler/c2000_6.2.7/lib" -i"c:/ti/ccsv6/tools/compiler/c2000_6.2.7/include" --reread_libs --display_error_number --diag_wrap=off --xml_link_info="Blinking Led_linkInfo.xml" --rom_model -o "Blinking Led.out" "./main.obj" "../F28335.cmd" -l"libc.a"
<Linking>
undefined first referenced
symbol in file
--------- ----------------
_ConfigCpuTimer ./main.obj
_CpuTimer0 ./main.obj
_CpuTimer0Regs ./main.obj
_GpioCtrlRegs ./main.obj
_GpioDataRegs ./main.obj
_InitCpuTimers ./main.obj
_InitPieCtrl ./main.obj
_InitPieVectTable ./main.obj
_InitSysCtrl ./main.obj
_PieCtrlRegs ./main.obj
_PieVectTable ./main.obj
error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "Blinking Led.out" not built
>> Compilation failure
gmake: *** [Blinking Led.out] Error 1
gmake: Target `all' not remade because of errors.
**** Build Finished ****
