245 lines
8.6 KiB
C
245 lines
8.6 KiB
C
|
//###########################################################################
|
||
|
|
//
|
||
|
|
// FILE: Example_2833xMCBSP_FFDLB.c
|
||
|
|
//
|
||
|
|
// TITLE: DSP2833x Device McBSP Digital Loop Back program.
|
||
|
|
//
|
||
|
|
// ASSUMPTIONS:
|
||
|
|
//
|
||
|
|
// This program requires the DSP2833x header files.
|
||
|
|
// As supplied, this project is configured for "boot to SARAM"
|
||
|
|
// operation. The 2833x Boot Mode table is shown below.
|
||
|
|
// For information on configuring the boot mode of an eZdsp,
|
||
|
|
// please refer to the documentation included with the eZdsp,
|
||
|
|
//
|
||
|
|
// $Boot_Table:
|
||
|
|
//
|
||
|
|
// GPIO87 GPIO86 GPIO85 GPIO84
|
||
|
|
// XA15 XA14 XA13 XA12
|
||
|
|
// PU PU PU PU
|
||
|
|
// ==========================================
|
||
|
|
// 1 1 1 1 Jump to Flash
|
||
|
|
// 1 1 1 0 SCI-A boot
|
||
|
|
// 1 1 0 1 SPI-A boot
|
||
|
|
// 1 1 0 0 I2C-A boot
|
||
|
|
// 1 0 1 1 eCAN-A boot
|
||
|
|
// 1 0 1 0 McBSP-A boot
|
||
|
|
// 1 0 0 1 Jump to XINTF x16
|
||
|
|
// 1 0 0 0 Jump to XINTF x32
|
||
|
|
// 0 1 1 1 Jump to OTP
|
||
|
|
// 0 1 1 0 Parallel GPIO I/O boot
|
||
|
|
// 0 1 0 1 Parallel XINTF boot
|
||
|
|
// 0 1 0 0 Jump to SARAM <- "boot to SARAM"
|
||
|
|
// 0 0 1 1 Branch to check boot mode
|
||
|
|
// 0 0 1 0 Boot to flash, bypass ADC cal
|
||
|
|
// 0 0 0 1 Boot to SARAM, bypass ADC cal
|
||
|
|
// 0 0 0 0 Boot to SCI-A, bypass ADC cal
|
||
|
|
// Boot_Table_End$
|
||
|
|
//
|
||
|
|
// DESCRIPTION:
|
||
|
|
//
|
||
|
|
// Digital loopback tests for the McBSP peripheral.
|
||
|
|
//
|
||
|
|
// Three different serial word sizes can be tested.
|
||
|
|
//
|
||
|
|
// Before compiling this project:
|
||
|
|
// * Select the serial word size (8/16/32) by using
|
||
|
|
// the #define statements at the beginning of the code.
|
||
|
|
//
|
||
|
|
|
||
|
|
//
|
||
|
|
// This example does not use interrupts. Instead, a polling
|
||
|
|
// method is used to check the receive data. The incoming
|
||
|
|
// data is checked for accuracy. If an error is found the error()
|
||
|
|
// function is called and execution stops.
|
||
|
|
//
|
||
|
|
// This program will execute until terminated by the user.
|
||
|
|
//
|
||
|
|
// Watch Variables:
|
||
|
|
// sdata1
|
||
|
|
// sdata2
|
||
|
|
// rdata1
|
||
|
|
// rdata2
|
||
|
|
// rdata1_point
|
||
|
|
// rdata2_point
|
||
|
|
//
|
||
|
|
//###########################################################################
|
||
|
|
//
|
||
|
|
// Original Author: S.S.
|
||
|
|
//
|
||
|
|
// $TI Release: DSP2833x/DSP2823x Header Files V1.20 $
|
||
|
|
// $Release Date: August 1, 2008 $
|
||
|
|
//###########################################################################
|
||
|
|
|
||
|
|
|
||
|
|
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
|
||
|
|
|
||
|
|
// Choose a word size. Uncomment one of the following lines
|
||
|
|
#define WORD_SIZE 8 // Run a loopback test in 8-bit mode
|
||
|
|
//#define WORD_SIZE 16 // Run a loopback test in 16-bit mode
|
||
|
|
//#define WORD_SIZE 32 // Run a loopback test in 32-bit mode
|
||
|
|
|
||
|
|
|
||
|
|
// Prototype statements for functions found within this file.
|
||
|
|
void mcbsp_xmit(int a, int b);
|
||
|
|
void error(void);
|
||
|
|
|
||
|
|
// Global data for this example
|
||
|
|
Uint16 sdata1 = 0x000; // Sent Data
|
||
|
|
Uint16 rdata1 = 0x000; // Recieved Data
|
||
|
|
|
||
|
|
Uint16 sdata2 = 0x000; // Sent Data
|
||
|
|
Uint16 rdata2 = 0x000; // Recieved Data
|
||
|
|
|
||
|
|
Uint16 rdata1_point;
|
||
|
|
Uint16 rdata2_point;
|
||
|
|
|
||
|
|
|
||
|
|
void main(void)
|
||
|
|
{
|
||
|
|
Uint16 datasize;
|
||
|
|
|
||
|
|
// Step 1. Initialize System Control:
|
||
|
|
// PLL, WatchDog, enable Peripheral Clocks
|
||
|
|
// This example function is found in the DSP2833x_SysCtrl.c file.
|
||
|
|
InitSysCtrl();
|
||
|
|
|
||
|
|
// Step 2. Initalize 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, 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 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
|
||
|
|
|
||
|
|
datasize = WORD_SIZE;
|
||
|
|
InitMcbspa(); // Initalize the Mcbsp-A in loopback test mode
|
||
|
|
|
||
|
|
// Step 5. User specific code, enable interrupts:
|
||
|
|
|
||
|
|
if(datasize == 8) // Run a loopback test in 8-bit mode
|
||
|
|
{
|
||
|
|
InitMcbspa8bit();
|
||
|
|
sdata2 = 0x0000; // value is a don't care for 8-bit mode
|
||
|
|
sdata1 = 0x0000; // 8-bit value to send
|
||
|
|
rdata2_point = 0x0000; // value is a don't care for 8-bit mode
|
||
|
|
rdata1_point = sdata1;
|
||
|
|
for(;;)
|
||
|
|
{
|
||
|
|
mcbsp_xmit(sdata1,sdata2);
|
||
|
|
sdata1++;
|
||
|
|
sdata1 = sdata1 & 0x00FF; // Keep it to 8-bits
|
||
|
|
|
||
|
|
while(McbspaRegs.SPCR1.bit.RRDY == 0 ) { } // Check for receive
|
||
|
|
rdata1 = McbspaRegs.DRR1.all; // read DRR1
|
||
|
|
if(rdata1 != rdata1_point) error();
|
||
|
|
rdata1_point++;
|
||
|
|
rdata1_point = rdata1_point & 0x00FF; // Keep it to 8-bits
|
||
|
|
|
||
|
|
asm(" nop"); // Good place for a breakpoint
|
||
|
|
// Check: rdatax_point = sdatax
|
||
|
|
// rdata1 = sdata1 - 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
else if(datasize == 16) // Run a loopback test in 16-bit mode
|
||
|
|
{
|
||
|
|
InitMcbspa16bit();
|
||
|
|
sdata2 = 0x0000; // value is a don't care for 16-bit mode
|
||
|
|
sdata1 = 0x0000; // 16-bit value to send
|
||
|
|
rdata2_point = 0x0000; // value is a don't care for 16-bit mode
|
||
|
|
rdata1_point = sdata1;
|
||
|
|
for(;;)
|
||
|
|
{
|
||
|
|
mcbsp_xmit(sdata1,sdata2);
|
||
|
|
sdata1++;
|
||
|
|
|
||
|
|
while(McbspaRegs.SPCR1.bit.RRDY == 0 ) { } // Check for receive
|
||
|
|
rdata1 = McbspaRegs.DRR1.all; // read DRR1
|
||
|
|
if(rdata1 != rdata1_point) error();
|
||
|
|
rdata1_point++;
|
||
|
|
|
||
|
|
asm(" nop"); // Good place for a breakpoint
|
||
|
|
// Check: rdatax_point = sdatax
|
||
|
|
// rdata1 = sdata1 - 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
else if(datasize == 32) // Run a loopback test in 16-bit mode
|
||
|
|
{
|
||
|
|
InitMcbspa32bit();
|
||
|
|
sdata1 = 0x0000;
|
||
|
|
sdata2 = 0xFFFF;
|
||
|
|
rdata1_point = sdata1;
|
||
|
|
rdata2_point = sdata2;
|
||
|
|
for(;;)
|
||
|
|
{
|
||
|
|
mcbsp_xmit(sdata1,sdata2);
|
||
|
|
sdata1++;
|
||
|
|
sdata2--;
|
||
|
|
|
||
|
|
while(McbspaRegs.SPCR1.bit.RRDY == 0 ) { } // Check for receive
|
||
|
|
rdata2 = McbspaRegs.DRR2.all;
|
||
|
|
rdata1 = McbspaRegs.DRR1.all;
|
||
|
|
if(rdata1 != rdata1_point) error();
|
||
|
|
if(rdata2 != rdata2_point) error();
|
||
|
|
rdata1_point++;
|
||
|
|
rdata2_point--;
|
||
|
|
|
||
|
|
asm(" nop"); // Good place for a breakpoint
|
||
|
|
// Check: rdatax_point = sdatax
|
||
|
|
// rdata1 = sdata1 - 1
|
||
|
|
// rdata2 = sdata2 + 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// Some Useful local functions
|
||
|
|
|
||
|
|
void error(void)
|
||
|
|
{
|
||
|
|
asm(" ESTOP0"); // test failed!! Stop!
|
||
|
|
for (;;);
|
||
|
|
}
|
||
|
|
|
||
|
|
void mcbsp_xmit(int a, int b)
|
||
|
|
{
|
||
|
|
McbspaRegs.DXR2.all=b;
|
||
|
|
McbspaRegs.DXR1.all=a;
|
||
|
|
}
|
||
|
|
|
||
|
|
//===========================================================================
|
||
|
|
// No more.
|
||
|
|
//===========================================================================
|
||
|
|
|
||
|
|
|