I connected the Bluetooth Module With SCIRX(28) and SCITX(29) pinsof my TMS320F28335 and transferring a message to the HERCULES terminal using 8 character bits, idle mode,1stop bit,odd parity. The Original message i want to transmit is ''The Bluetooth Module is working Fine''.
But I can see only eBletootheiorle in the Hercules terminal.
C code i used
#include "DSP2833x_Device.h"
// External Function prototypes
extern void InitSysCtrl(void);
extern void InitPieCtrl(void);
extern void InitPieVectTable(void);
extern void InitCpuTimers(void);
extern void ConfigCpuTimer(struct CPUTIMER_VARS *, float, float);
// Prototype statements for functions found within this file.
void Gpio_select(void);
void SCIA_init(void);
interrupt void cpu_timer0_isr(void); // Prototype for Timer 0 Interrupt Service Routine
//###########################################################################
// main code
//###########################################################################
void main(void)
{
char message[]={"The Bluetooth MOdule is Working Fine \n\r"};
unsigned int index =0; // pointer into string
InitSysCtrl(); // Basic Core Initialization
// SYSCLK=150MHz, HISPCLK= 75MHz, LSPCLK=37.5MHz
EALLOW;
SysCtrlRegs.WDCR= 0x00AF; // Re-enable the watchdog
EDIS; // 0x00E8 to disable the Watchdog , Prescaler = 1
// 0x00AF to NOT disable the Watchdog, Prescaler = 64
Gpio_select(); // GPIO9, GPIO11, GPIO34 and GPIO49 as output
// to 4 LEDs at Peripheral Explorer
SCIA_init(); // Initalize SCI
InitPieCtrl(); // default status of PIE; in DSP2833x_PieCtrl.c
InitPieVectTable(); // init PIE vector table; in DSP2833x_PieVect.c
// re-map PIE - entry for Timer 0 Interrupt
EALLOW;
PieVectTable.TINT0 = &cpu_timer0_isr;
EDIS;
InitCpuTimers(); // Function in: DSP2833x_CpuTimers.c
// Configure CPU-Timer 0 to interrupt every 50 ms:
// 150MHz CPU Freq, 50000 µseconds interrupt period
ConfigCpuTimer(&CpuTimer0, 150, 50000); // DSP2833x_CpuTimers.c
// Enable TINT0 in the PIE: Group 1 interrupt 7
PieCtrlRegs.PIEIER1.bit.INTx7 = 1;
// Enable CPU INT1 which is connected to CPU-Timer 0:
IER = 1;
// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
CpuTimer0Regs.TCR.bit.TSS = 0; // Start T0
while(1)
{
SciaRegs.SCITXBUF=message[index++]; // send single character
while ( SciaRegs.SCICTL2.bit.TXEMPTY == 0); //wait for TX -empty
if (message[index]== '\0') // test '\0' end of string
{
index =0;
while(CpuTimer0.InterruptCount < 40) // 40 * 50ms = 2 sec
{
EALLOW;
SysCtrlRegs.WDKEY = 0xAA; // Service watchdog #2
EDIS;
}
CpuTimer0.InterruptCount = 0;
}
}
}
void Gpio_select(void)
{
EALLOW;
GpioCtrlRegs.GPAPUD.bit.GPIO28=1; // Enable pull-up for GPIO28 (SCIRXDA)
GpioCtrlRegs.GPAPUD.bit.GPIO29=1; // Enable pull-up for GPIO29 (SCITXDA)
GpioCtrlRegs.GPAMUX1.all = 0; // GPIO15 ... GPIO0 = General Puropse I/O
GpioCtrlRegs.GPAMUX2.all = 0; // GPIO31 ... GPIO16 = General Purpose I/O
GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 1; // SCIRXDA
GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1; // SCITXDA
GpioCtrlRegs.GPBMUX1.all = 0; // GPIO47 ... GPIO32 = General Purpose I/O
GpioCtrlRegs.GPBMUX2.all = 0; // GPIO63 ... GPIO48 = General Purpose I/O
GpioCtrlRegs.GPCMUX1.all = 0; // GPIO79 ... GPIO64 = General Purpose I/O
GpioCtrlRegs.GPCMUX2.all = 0; // GPIO87 ... GPIO80 = General Purpose I/O
GpioCtrlRegs.GPADIR.all = 0;
//GpioCtrlRegs.GPADIR.bit.GPIO9 = 1; // peripheral explorer: LED LD1 at GPIO9
//GpioCtrlRegs.GPADIR.bit.GPIO11 = 1; // peripheral explorer: LED LD2 at GPIO11
GpioCtrlRegs.GPBDIR.all = 0; // GPIO63-32 as inputs
GpioCtrlRegs.GPBDIR.bit.GPIO34 = 1; // peripheral explorer: LED LD3 at GPIO34
GpioCtrlRegs.GPADIR.bit.GPIO31 = 1; // peripheral explorer: LED LD4 at GPIO49
GpioCtrlRegs.GPCDIR.all = 0; // GPIO87-64 as inputs
EDIS;
}
void SCIA_init()
{
SciaRegs.SCICCR.all =0x0027; // 1 stop bit, No loopback
// ODD parity,8 char bits,
// async mode, idle-line protocol
SciaRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
// SYSCLOCKOUT = 150MHz; LSPCLK = 1/4 = 37.5 MHz
// BRR = (LSPCLK / (9600 x 8)) -1
// BRR = 487 gives 9605 Baud
SciaRegs.SCIHBAUD = 487 >> 8; // Highbyte
SciaRegs.SCILBAUD = 487 & 0x00FF; // Lowbyte
SciaRegs.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
}
interrupt void cpu_timer0_isr(void)
{
CpuTimer0.InterruptCount++; // increment time counter
GpioDataRegs.GPBTOGGLE.bit.GPIO34 = 1; // toggle LED at GPIO34
// Service the watchdog every Timer 0 interrupt
EALLOW;
SysCtrlRegs.WDKEY = 0x55; // Service watchdog #1
EDIS;
// Acknowledge this interrupt to receive more interrupts from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
//===========================================================================
// End of Source Code.
//===========================================================================
Plz help me out.
Thanks in advance
