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//###########################################################################
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//
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// FILE: Example_2833xMCBSP_FFDLB_int.c
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//
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// TITLE: DSP2833x Device McBSP Digital Loop Back porgram
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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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// 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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// This program is a McBSP example that uses the internal loopback of
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// the peripheral. Both Rx and Tx interrupts are enabled.
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//
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// Incrementing values from 0x0000 to 0x00FF are being sent and received.
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//
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// This pattern is repeated forever.
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//
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// By default for the McBSP examples, the McBSP sample rate generator (SRG) input
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// clock frequency is LSPCLK (150E6/4 or 100E6/4) assuming SYSCLKOUT = 150 MHz or
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// 100 MHz respectively. If while testing, the SRG input frequency
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// is changed, the #define MCBSP_SRG_FREQ (150E6/4 or 100E6/4) in the Mcbsp.c file must
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// also be updated accordingly. This define is used to determine the Mcbsp initialization
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// delay after the SRG is enabled, which must be at least 2 SRG clock cycles.
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//
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// Watch Variables:
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// sdata
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// rdata
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// rdata_point
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//
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//###########################################################################
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//
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// Original Source by S.D.
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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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// Prototype statements for functions found within this file.
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interrupt void Mcbsp_TxINTA_ISR(void);
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interrupt void Mcbsp_RxINTA_ISR(void);
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void mcbsp_init_dlb(void);
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void error(void);
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// Global data variables used for this example
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Uint16 sdata; // Sent Data
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Uint16 rdata; // Recieved Data
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Uint16 rdata_point; // Keep track of where we
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// are in the data stream
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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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// Setup only the GP I/O only for McBSP-A functionality
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InitMcbspaGpio();
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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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// Interrupts that are used in this example are re-mapped to
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// ISR functions found within this file.
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EALLOW; // Allow access to EALLOW protected registers
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PieVectTable.MRINTA= &Mcbsp_RxINTA_ISR;
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PieVectTable.MXINTA= &Mcbsp_TxINTA_ISR;
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EDIS; // Disable access to EALLOW protected registers
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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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mcbsp_init_dlb(); // For this example, only initialize the Mcbsp
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// Step 5. User specific code, enable interrupts:
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sdata = 0;
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rdata_point = sdata;
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// Enable interrupts required for this example
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PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable the PIE block
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PieCtrlRegs.PIEIER6.bit.INTx5=1; // Enable PIE Group 6, INT 5
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PieCtrlRegs.PIEIER6.bit.INTx6=1; // Enable PIE Group 6, INT 6
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IER=0x20; // Enable CPU INT6
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EINT; // Enable Global Interrupts
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// Step 6. IDLE loop. Just sit and loop forever (optional):
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for(;;);
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}
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// Step 7. Insert all local Interrupt Service Routines (ISRs) and functions here:
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void error(void)
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{
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asm(" ESTOP0"); // Test failed!! Stop!
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for (;;);
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}
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void mcbsp_init_dlb()
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{
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//*************** RESET MCBSP
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McbspaRegs.SPCR2.bit.FRST=0; // Frame Sync generator reset
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McbspaRegs.SPCR2.bit.GRST=0; // Sample Rate generator Reset
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McbspaRegs.SPCR2.bit.XRST=0; // Transmitter reset
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McbspaRegs.SPCR1.bit.RRST=0; // Receiver reset
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//*************** Initialize McBSP Registers
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// McBSP register settings for Digital loop back
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McbspaRegs.SPCR2.all=0x0000; // XRST =0
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McbspaRegs.SPCR1.all=0x8000; // RRST =0, DLB enabled
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McbspaRegs.RCR2.all=0x0001; // RDATDLY = 1
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McbspaRegs.RCR1.all=0x0;
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McbspaRegs.XCR2.all=0x0001; // XDATDLY = 1
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McbspaRegs.XCR1.all=0x0;
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McbspaRegs.SRGR2.all=0x3140;
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McbspaRegs.SRGR1.all=0x010f;
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McbspaRegs.MCR2.all=0x0;
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McbspaRegs.MCR1.all=0x0;
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McbspaRegs.PCR.all=0x0A00;
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McbspaRegs.MFFINT.bit.XINT = 1; // Enable Transmit Interrupts
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McbspaRegs.MFFINT.bit.RINT = 1; // Enable Receive Interrupts
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//************* Enable Sample rate generator
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McbspaRegs.SPCR2.bit.GRST=1;
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delay_loop(); // Wait at least 2 SRG clock cycles
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//************ Enable TX/RX unit
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McbspaRegs.SPCR2.bit.XRST=1;
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McbspaRegs.SPCR1.bit.RRST=1;
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//************ Frame Sync generator reset
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McbspaRegs.SPCR2.bit.FRST=1;
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}
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interrupt void Mcbsp_TxINTA_ISR(void)
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{
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McbspaRegs.DXR1.all= sdata;
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sdata = (sdata+1)& 0x00FF ;
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// To receive more interrupts from this PIE group, acknowledge this interrupt
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PieCtrlRegs.PIEACK.all = PIEACK_GROUP6;
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}
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interrupt void Mcbsp_RxINTA_ISR(void)
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{
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rdata=McbspaRegs.DRR1.all;
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if (rdata != ( (rdata_point) & 0x00FF) ) error();
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rdata_point = (rdata_point+1) & 0x00FF;
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// To receive more interrupts from this PIE group, acknowledge this interrupt
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PieCtrlRegs.PIEACK.all = PIEACK_GROUP6;
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}
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//===========================================================================
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// No more.
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//===========================================================================
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@@ -0,0 +1,27 @@
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menuitem "DSP2833x McBSP Int"
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hotmenu Load_and_Build_Project()
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{
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GEL_ProjectLoad("Example_2833xMcBSP_DLB_int.pjt");
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GEL_ProjectBuild("Example_2833xMcBSP_DLB_int.pjt");
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Setup_WatchWindow();
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}
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hotmenu Load_Code()
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{
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GEL_Load(".\\debug\\Example_2833xMcBSP_DLB_int.out");
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Setup_WatchWindow();
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}
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Setup_WatchWindow()
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{
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GEL_WatchReset();
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GEL_WatchAdd("sdata,x");
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GEL_WatchAdd("rdata,x");
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GEL_WatchAdd("rdata_point,x");
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}
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@@ -0,0 +1,45 @@
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; Code Composer Project File, Version 2.0 (do not modify or remove this line)
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[Project Settings]
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ProjectName="DSP2833x"
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ProjectDir="C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\mcbsp_loopback_interrupts\"
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ProjectType=Executable
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CPUFamily=TMS320C28XX
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Tool="Compiler"
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Tool="DspBiosBuilder"
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Tool="Linker"
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Config="Debug"
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Config="Release"
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[Source Files]
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Source="..\..\DSP2833x_common\source\DSP2833x_ADC_cal.asm"
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Source="..\..\DSP2833x_common\source\DSP2833x_CodeStartBranch.asm"
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Source="..\..\DSP2833x_common\source\DSP2833x_DefaultIsr.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_McBSP.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_PieCtrl.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_PieVect.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_SysCtrl.c"
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Source="..\..\DSP2833x_common\source\DSP2833x_usDelay.asm"
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Source="..\..\DSP2833x_headers\source\DSP2833x_GlobalVariableDefs.c"
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Source="Example_2833xMcBSP_DLB_int.c"
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Source="..\..\DSP2833x_common\cmd\28335_RAM_lnk.cmd"
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Source="..\..\DSP2833x_headers\cmd\DSP2833x_Headers_nonBIOS.cmd"
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["Compiler" Settings: "Debug"]
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Options=-g -q -pdr -as -fr"C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\mcbsp_loopback_interrupts\Debug" -fs"C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\mcbsp_loopback_interrupts\Debug" -i"..\..\DSP2833x_headers\include" -i"..\..\DSP2833x_common\include" -d"_DEBUG" -d"LARGE_MODEL" --float_support=fpu32 -ml -mt -v28
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["Compiler" Settings: "Release"]
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Options=-q -o3 -fr"C:\tidcs\c28\DSP2833x\v120\DSP2833x_examples\mcbsp_loopback_interrupts\Release" -d"LARGE_MODEL" -ml -v28
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["DspBiosBuilder" Settings: "Debug"]
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Options=-v28
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["DspBiosBuilder" Settings: "Release"]
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Options=-v28
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["Linker" Settings: "Debug"]
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Options=-q -c -m".\Debug\Example_2833xMcBSP_DLB_int.map" -o".\Debug\Example_2833xMcBSP_DLB_int.out" -stack0x380 -w -x -i"..\..\DSP2833x_headers\include" -l"rts2800_fpu32.lib"
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["Linker" Settings: "Release"]
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Options=-q -c -o".\Release\Example_2833xMcBSP_DLB.out" -x
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