main was created

main.cpp

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+#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File
+
+#define EXAMPLE1 1  // Use DATA registers to toggle I/O's
+#define EXAMPLE2 0  // Use SET/CLEAR registers to toggle I/O's
+#define EXAMPLE3 0  // Use TOGGLE registers to toggle I/O's
+
+void delay_loop(void);
+void Gpio_select(void);
+void Gpio_example1(void);
+void Gpio_example2(void);
+void Gpio_example3(void);
+
+//
+// Main
+//
+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
+
+    //
+    // For this example use the following configuration
+    //
+    Gpio_select();
+
+    //
+    // Step 3. Clear all interrupts and initialize PIE vector table
+    // Disable CPU interrupts
+    //
+    DINT;
+
+    //
+    // Initialize 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();
+
+    //
+    // 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:
+    //
+#if EXAMPLE1
+    //
+    // This example uses DATA registers to toggle I/O's
+    //
+    Gpio_example1();
+#endif  // - EXAMPLE1
+
+#if EXAMPLE2
+    //
+    // This example uses SET/CLEAR registers to toggle I/O's
+    //
+    Gpio_example2();
+#endif
+
+#if EXAMPLE3
+    //
+    // This example uses TOGGLE registers to toggle I/O's
+    //
+    Gpio_example3();
+#endif
+}
+
+//
+// delay_loop - 
+//
+void 
+delay_loop()
+{
+    volatile long i;
+    for (i = 0; i < 1000000; i++) 
+    {
+        
+    }
+}
+
+//
+// Gpio_example1 -
+//
+void Gpio_example1(void){
+    //
+    // Example 1: Toggle I/Os using DATA registers
+    //
+    for(;;)
+    {
+        GpioDataRegs.GPADAT.all    =0xAAAAAAAA;
+        GpioDataRegs.GPBDAT.all    =0x0000000A;
+
+        delay_loop();
+
+        GpioDataRegs.GPADAT.all    =0x55555555;
+        GpioDataRegs.GPBDAT.all    =0x00000005;
+
+        delay_loop();
+    }
+}
+
+//
+// Gpio_example2 -
+//
+void Gpio_example2(void) {
+    //
+    // Example 2: Toggle I/Os using SET/CLEAR registers
+    //
+    for(;;)
+    {
+        GpioDataRegs.GPASET.all    =0xAAAAAAAA;
+        GpioDataRegs.GPACLEAR.all  =0x55555555;
+
+        GpioDataRegs.GPBSET.all    =0x0000000A;
+        GpioDataRegs.GPBCLEAR.all  =0x00000005;
+
+        delay_loop();
+
+        GpioDataRegs.GPACLEAR.all    =0xAAAAAAAA;
+        GpioDataRegs.GPASET.all      =0x55555555;
+
+        GpioDataRegs.GPBCLEAR.all    =0x0000000A;
+        GpioDataRegs.GPBSET.all      =0x00000005;
+
+        delay_loop();
+    }
+}
+
+//
+// Gpio_example3 -
+//
+void Gpio_example3(void) {
+    //
+    // Example 2: Toggle I/Os using TOGGLE registers
+    //
+
+    //
+    // Set pins to a known state
+    //
+    GpioDataRegs.GPASET.all    =0xAAAAAAAA;
+    GpioDataRegs.GPACLEAR.all  =0x55555555;
+
+    GpioDataRegs.GPBSET.all    =0x0000000A;
+    GpioDataRegs.GPBCLEAR.all  =0x00000005;
+
+    //
+    // Use TOGGLE registers to flip the state of the pins.
+    // Any bit set to a 1 will flip state (toggle)
+    // Any bit set to a 0 will not toggle.
+    //
+    for(;;)
+    {
+        GpioDataRegs.GPATOGGLE.all =0xFFFFFFFF;
+        GpioDataRegs.GPBTOGGLE.all =0x0000000F;
+        delay_loop();
+    }
+}
+
+//
+// Gpio_select -
+//
+void Gpio_select(void) {
+    EALLOW;
+    GpioCtrlRegs.GPAMUX1.all = 0x00000000;  // All GPIO
+    GpioCtrlRegs.GPAMUX2.all = 0x00000000;  // All GPIO
+    GpioCtrlRegs.GPAMUX1.all = 0x00000000;  // All GPIO
+    GpioCtrlRegs.GPADIR.all = 0xFFFFFFFF;   // All outputs
+    GpioCtrlRegs.GPBDIR.all = 0x0000000F;   // All outputs
+    EDIS;
+}
+
+//
+// End of File
+//
+