The SCI port A FIFO interrupt I cannot get to fire with the following setup, this is also the same setup used with port B that is working.
Interrupt Service Routines:
interrupt
void SciRx_ISR( void )
{
Uint16 Index = 0;
//Empty the Data Buffer
for
( Index = 0; Index < 16; Index++ )
{ SciRxDataBuffer[ Index ] = SciaRegs.SCIRXBUF.bit.RXDT; }
//Read the data buffer
SciaRegs.SCIFFRX.bit.RXFFOVRCLR = 1;
SciaRegs.SCIFFRX.bit.RXFFINTCLR = 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP9;
//Acknowledge Interrupt
}
//Sci Rx Interrupt Service Routine
interrupt
void SciTx_ISR( void )
{
Uint16 Index = 0;
//STUFF THE FIFO
for
( Index = 0; Index < 16; Index++ )
{ ScibRegs.SCITXBUF = 0xFF; }
//Stuff the FIFO
SciaRegs.SCIFFTX.bit.TXFFINTCLR = 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP9;
//Acknowledge Interrupt
}
//Sci Tx Interrupt Service Routine
Initialization
void {
// Initialize SCI-A: Port used for flash programming
//This port is used by the bootloader and the GUI link
InitSciaGpio();
InitSciA();
}
void
InitSciaGpio()
{ EALLOW; /* Enable internal pull-up for the selected pins */
// Pull-ups can be enabled or disabled disabled by the user.
// This will enable the pullups for the specified pins.
GpioCtrlRegs.GPAPUD.bit.GPIO28 = 0;
// Enable pull-up for GPIO28 (SCIRXDA)
GpioCtrlRegs.GPAPUD.bit.GPIO29 = 0;
// Enable pull-up for GPIO29 (SCITXDA)
/* Set qualification for selected pins to asynch only */
// Inputs are synchronized to SYSCLKOUT by default.
// This will select asynch (no qualification) for the selected pins.
GpioCtrlRegs.GPAQSEL2.bit.GPIO28 = 3;
// Asynch input GPIO28 (SCIRXDA)
/* Configure SCI-A pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be SCI functional pins.
GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 1;
// Configure GPIO28 for SCIRXDA operation
GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1;
// Configure GPIO29 for SCITXDA operation
EDIS;
}
void
InitSciA( void
)
{
//Control Register 1
SciaRegs.SCICTL1.bit.SWRESET = 0;
//Put the port in reset
//Communication Control Register
SciaRegs.SCICCR.bit.STOPBITS = 0;
//One Stop Bit
SciaRegs.SCICCR.bit.PARITY = 0;
//Odd Parity
SciaRegs.SCICCR.bit.PARITYENA = 1;
//Parity Enabled
SciaRegs.SCICCR.bit.LOOPBKENA = 0;
//Loopback Disabled
SciaRegs.SCICCR.bit.ADDRIDLE_MODE = 0;
//Idle-Line Protocol Selected
SciaRegs.SCICCR.bit.SCICHAR = 7;
//8 Data Bits
//Control Register 1
SciaRegs.SCICTL1.bit.TXENA = 1;
//Transmitter Enabled
SciaRegs.SCICTL1.bit.RXENA = 1;
//Receiver Enabled
SciaRegs.SCICTL1.bit.RXERRINTENA = 1;
SciaRegs.SCIHBAUD = 0x01;
//Configure for 9600 Baud Rate
SciaRegs.SCILBAUD = 0xE7;
//Configure for 9600 Baud Rate
//FIFO Configuration Registers
//Tx
SciaRegs.SCIFFTX.bit.SCIRST = 1;
//FIFO Can Receive/Transmit
SciaRegs.SCIFFTX.bit.TXFIFOXRESET = 0;
//Hold In Reset
// SciaRegs.SCIFFTX.bit.SCIFFENA = 0; //FIFO Enhancements are disabled
SciaRegs.SCIFFTX.bit.SCIFFENA = 1;
//FIFO Enhancements are Enabled
SciaRegs.SCIFFTX.bit.TXFFIENA = 1;
//Transmit FIFO Interrupt Enabled
SciaRegs.SCIFFTX.bit.TXFFIL = 0;
//Fire Tx Interrupt when empty
//Rx
SciaRegs.SCIFFRX.bit.RXFIFORESET = 0;
//Hold In Reset
SciaRegs.SCIFFRX.bit.RXFFIENA = 1;
//Enable Rx Interrupt
SciaRegs.SCIFFRX.bit.RXFFIL = 1;
//Set FIFO Level to 16 bytes
//Control
SciaRegs.SCIFFCT.bit.CDC = 0;
//Disable Auto Baud Alignment
SciaRegs.SCIFFCT.bit.FFTXDLY = 0;
//0 Tx Delay
//Enable The Device and Take it out of Reset
SciaRegs.SCICTL1.bit.SWRESET = 1;
//Enable the SCI Port
SciaRegs.SCIFFRX.bit.RXFIFORESET = 1;
//Take Rx FIFO out of reset
SciaRegs.SCIFFTX.bit.TXFIFOXRESET = 1;
//Take Rx FIFO out of reset
}
//InitSciA
PIE Controls
PieCtrlRegs.PIEIER9.bit.INTx1 = 1; PieCtrlRegs.PIEIER9.bit.INTx2 = 1;
PieVectTable.SCIRXINTA = &SciRx_ISR;
PieVectTable.SCITXINTA = &SciTx_ISR;
//GUI Sci Tx Interrupt
There is probably something small that I am missing, I have made sure that the SCIA clock is enabled but I seem to be missing something because I see that the SciaRegs,SCIFFTX.TXFFINT = 1 but but my code never enters the ISR, and I send data from my PC to the device and I can see it on a Oscilloscope but yet the Rx interrupt does not fire.
//GUI Sci RX Interrupt
