void InitMcbspGpio(void)
{
InitMcbspaGpio();
#if DSP28_MCBSPB
InitMcbspbGpio();
#endif // end DSP28_MCBSPB
}
//
// Main
//
void main(void)
{
//
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xS_SysCtrl.c file.
//
InitSysCtrl();
//
// Step 2. Initialize GPIO:
// This example function is found in the F2837xS_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// For this example, only enable the GPIO for McBSP-A
//
InitMcbspaGpio();
//
// 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 F2837xS_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 F2837xS_DefaultIsr.c.
// This function is found in F2837xS_PieVect.c.
//
InitPieVectTable();
//
// Step 4. User specific code
//
init_mcbsp_spi();
sdata1 = 0x55aa;
sdata2 = 0xaa55;
//
// Main loop to transfer 32-bit words through MCBSP in SPI mode periodically
//
for(;;)
{
mcbsp_xmit(sdata1,sdata2);
//
// Master waits until RX data is ready
//
while( McbspaRegs.SPCR1.bit.RRDY == 0 ) {}
rdata2 = McbspaRegs.DRR2.all; // Read DRR2 first.
rdata1 = McbspaRegs.DRR1.all; // Then read DRR1 to complete
// receiving of data.
//
// Check that correct data is received.
//
if((rdata2 != sdata2)&&(rdata1 != sdata1))
{
error( );
}
delay_loop();
sdata1^=0xFFFF;
sdata2^=0xFFFF;
__asm(" nop"); // Good place for a breakpoint
}
}
//
// Main
//
void main(void)
{
//
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xS_SysCtrl.c file.
//
InitSysCtrl();
//
// Step 2. Initialize GPIO:
// This example function is found in the F2837xS_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// Setup only the GP I/O only for McBSP-A functionality
//
InitMcbspaGpio();
//
// 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 F2837xS_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 F2837xS_DefaultIsr.c.
// This function is found in F2837xS_PieVect.c.
//
InitPieVectTable();
//
// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
//
EALLOW; // Allow access to EALLOW protected registers
PieVectTable.MCBSPA_RX_INT = &Mcbsp_RxINTA_ISR;
PieVectTable.MCBSPA_TX_INT = &Mcbsp_TxINTA_ISR;
EDIS; // Disable access to EALLOW protected registers
//
// Step 4. Initialize the Device Peripherals:
//
mcbsp_init_dlb(); // For this example, only initialize the Mcbsp
//
// Step 5. User specific code, enable interrupts:
//
sdata = 0;
rdata_point = sdata;
//
// Enable interrupts required for this example
//
PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable the PIE block
PieCtrlRegs.PIEIER6.bit.INTx5 = 1; // Enable PIE Group 6, INT 5
PieCtrlRegs.PIEIER6.bit.INTx6 = 1; // Enable PIE Group 6, INT 6
IER = 0x20; // Enable CPU INT6
EINT; // Enable Global Interrupts
//
// Step 6. IDLE loop. Just sit and loop forever (optional):
//
for(;;);
}
void InitMcbspGpio(void)
{
InitMcbspaGpio();
}
