246 lines
7.1 KiB
C
246 lines
7.1 KiB
C
// TI File $Revision: /main/8 $
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// Checkin $Date: April 21, 2008 15:42:43 $
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//###########################################################################
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//
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// FILE: Example_2833xGpioToggle.c
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//
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// TITLE: DSP2833x Device GPIO toggle test program.
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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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// ALL OF THE I/O'S TOGGLE IN THIS PROGRAM. MAKE SURE
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// THIS WILL NOT DAMAGE YOUR HARDWARE BEFORE RUNNING THIS
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// EXAMPLE.
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//
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// Monitor desired pins on an oscilloscope.
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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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// Three different examples are included. Select the example
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// (data, set/clear or toggle) to execute before compiling using
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// the #define statements found at the top of the code.
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//
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//
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// Toggle all of the GPIO PORT pins
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//
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// The pins can be observed using Oscilloscope.
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//
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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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// Select the example to compile in. Only one example should be set as 1
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// the rest should be set as 0.
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#define EXAMPLE1 1 // Use DATA registers to toggle I/O's
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#define EXAMPLE2 0 // Use SET/CLEAR registers to toggle I/O's
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#define EXAMPLE3 0 // Use TOGGLE registers to toggle I/O's
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// Prototype statements for functions found within this file.
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void delay_loop(void);
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void Gpio_select(void);
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void Gpio_example1(void);
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void Gpio_example2(void);
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void Gpio_example3(void);
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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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// For this example use the following configuration:
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Gpio_select();
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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 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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// 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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#if EXAMPLE1
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// This example uses DATA registers to toggle I/O's
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Gpio_example1();
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#endif // - EXAMPLE1
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#if EXAMPLE2
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// This example uses SET/CLEAR registers to toggle I/O's
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Gpio_example2();
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#endif
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#if EXAMPLE3
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// This example uses TOGGLE registers to toggle I/O's
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Gpio_example3();
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#endif
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}
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void delay_loop()
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{
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short i;
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for (i = 0; i < 1000; i++) {}
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}
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void Gpio_example1(void)
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{
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// Example 1:
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// Toggle I/Os using DATA registers
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for(;;)
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{
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GpioDataRegs.GPADAT.all =0xAAAAAAAA;
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GpioDataRegs.GPBDAT.all =0x0000000A;
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delay_loop();
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GpioDataRegs.GPADAT.all =0x55555555;
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GpioDataRegs.GPBDAT.all =0x00000005;
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delay_loop();
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}
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}
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void Gpio_example2(void)
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{
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// Example 2:
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// Toggle I/Os using SET/CLEAR registers
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for(;;)
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{
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GpioDataRegs.GPASET.all =0xAAAAAAAA;
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GpioDataRegs.GPACLEAR.all =0x55555555;
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GpioDataRegs.GPBSET.all =0x0000000A;
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GpioDataRegs.GPBCLEAR.all =0x00000005;
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delay_loop();
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GpioDataRegs.GPACLEAR.all =0xAAAAAAAA;
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GpioDataRegs.GPASET.all =0x55555555;
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GpioDataRegs.GPBCLEAR.all =0x0000000A;
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GpioDataRegs.GPBSET.all =0x00000005;
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delay_loop();
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}
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}
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void Gpio_example3(void)
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{
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// Example 2:
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// Toggle I/Os using TOGGLE registers
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// Set pins to a known state
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GpioDataRegs.GPASET.all =0xAAAAAAAA;
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GpioDataRegs.GPACLEAR.all =0x55555555;
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GpioDataRegs.GPBSET.all =0x0000000A;
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GpioDataRegs.GPBCLEAR.all =0x00000005;
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// Use TOGGLE registers to flip the state of
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// the pins.
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// Any bit set to a 1 will flip state (toggle)
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// Any bit set to a 0 will not toggle.
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for(;;)
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{
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GpioDataRegs.GPATOGGLE.all =0xFFFFFFFF;
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GpioDataRegs.GPBTOGGLE.all =0x0000000F;
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delay_loop();
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}
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}
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void Gpio_select(void)
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{
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EALLOW;
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GpioCtrlRegs.GPAMUX1.all = 0x00000000; // All GPIO
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GpioCtrlRegs.GPAMUX2.all = 0x00000000; // All GPIO
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GpioCtrlRegs.GPAMUX1.all = 0x00000000; // All GPIO
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GpioCtrlRegs.GPADIR.all = 0xFFFFFFFF; // All outputs
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GpioCtrlRegs.GPBDIR.all = 0x0000000F; // All outputs
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EDIS;
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}
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//===========================================================================
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// No more.
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//===========================================================================
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