Tool/software:
Hi all,
I am using one of the example projects where I have to use both the CPUs to blink LEDs. Here I find that in both the CPUs in bitfield, they are using InitSysCtrl() function to Initialize both the CPUs. Is it necessary to use InitSysCtrl() function in CPU2? In the driverlib approach also, do I need to add the Device_Init() function in both the CPUs? This is considering that both the CPUs are run from FLASH.
Code for CPU1:
//###########################################################################
//
// FILE: blinky_cpu01.c
//
// TITLE: LED Blink Example for F2837xD.
//
//! \addtogroup dual_example_list
//! <h1> Blinky </h1>
//!
//! Dual Core Blinky Example. This example demonstrates how to implement
//! and run a standalone application on both cores.
//!
//
//###########################################################################
//
// $Release Date: $
// $Copyright:
// Copyright (C) 2013-2025 Texas Instruments Incorporated - http://www.ti.com/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the
// distribution.
//
// Neither the name of Texas Instruments Incorporated nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//###########################################################################
//
// Included Files
//
#include "F28x_Project.h"
#include "F2837xD_Ipc_drivers.h"
//
// Main
//
void main(void)
{
//
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xD_SysCtrl.c file.
//
InitSysCtrl();
#ifdef _STANDALONE
#ifdef _FLASH
//
// Send boot command to allow the CPU2 application to begin execution
//
IPCBootCPU2(C1C2_BROM_BOOTMODE_BOOT_FROM_FLASH);
#else
//
// Send boot command to allow the CPU2 application to begin execution
//
IPCBootCPU2(C1C2_BROM_BOOTMODE_BOOT_FROM_RAM);
#endif
#endif
//
// Call Flash Initialization to setup flash waitstates
// This function must reside in RAM
//
#ifdef _FLASH
InitFlash();
#endif
//
// Step 2. Initialize GPIO:
// This example function is found in the F2837xD_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
//
InitGpio(); // Skipped for this example
EALLOW;
GpioCtrlRegs.GPADIR.bit.GPIO31 = 1;
GPIO_SetupPinOptions(34, GPIO_OUTPUT, GPIO_PUSHPULL);
GPIO_SetupPinMux(34, GPIO_MUX_CPU2, 0);
//
// TODO Add code to allow configuration of GPADIR from CPU02 using IPC
//
EDIS;
GpioDataRegs.GPADAT.bit.GPIO31 = 1;// turn off LED
//
// 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 F2837xD_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 F2837xD_DefaultIsr.c.
// This function is found in F2837xD_PieVect.c.
//
InitPieVectTable();
//
// 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(;;)
{
//
// Turn on LED
//
GpioDataRegs.GPADAT.bit.GPIO31 = 0;
//
// Delay for a bit.
//
DELAY_US(1000 * 500);
//
// Turn off LED
//
GpioDataRegs.GPADAT.bit.GPIO31 = 1;
//
// Delay for a bit.
//
DELAY_US(1000 * 500);
}
}
//
// End of file
//
Code for CPU2:
//###########################################################################
//
// FILE: blinky_cpu02.c
//
// TITLE: LED Blink Example for F2837xD.
//
// Dual Core Blinky Example. This example demonstrates how to run a
// implement a standalone application on both cores.
//
//###########################################################################
//
// $Release Date: $
// $Copyright:
// Copyright (C) 2013-2025 Texas Instruments Incorporated - http://www.ti.com/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the
// distribution.
//
// Neither the name of Texas Instruments Incorporated nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//###########################################################################
//
// Included Files
//
#include "F28x_Project.h"
#ifdef _FLASH
//
// These are defined by the linker (see device linker command file)
//
extern Uint16 RamfuncsLoadStart;
extern Uint16 RamfuncsLoadSize;
extern Uint16 RamfuncsRunStart;
#endif
//
// Main
//
void main(void)
{
//
// Copy time critical code and Flash setup code to RAM
// This includes InitFlash(), Flash API functions and any functions that are
// assigned to ramfuncs section.
// The RamfuncsLoadStart, RamfuncsLoadEnd, and RamfuncsRunStart
// symbols are created by the linker. Refer to the device .cmd file.
//
#ifdef _FLASH
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
#endif
//
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xD_SysCtrl.c file.
//
InitSysCtrl();
//
// Call Flash Initialization to setup flash waitstates
// This function must reside in RAM
//
#ifdef _FLASH
InitFlash();
#endif
//
// Step 2. Initialize GPIO:
// This example function is found in the F2837xD_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
//
// InitGpio(); // Skipped for this example
EALLOW;
//
//TODO Add code to configure GPADIR through IPC
//
GPIO_WritePin(34, 1);
//
// 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 F2837xD_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 F2837xD_DefaultIsr.c.
// This function is found in F2837xD_PieVect.c.
//
InitPieVectTable();
//
// 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(;;)
{
//
// Turn on LED
//
GPIO_WritePin(34, 0);
//
// Delay for a bit.
//
DELAY_US(1000 * 250);
//
// Turn off LED
//
GPIO_WritePin(34, 1);
//
// Delay for a bit.
//
DELAY_US(1000 * 250);
}
}
//
// End of file
//
