Part Number: LAUNCHXL-F280049C
Other Parts Discussed in Thread: SYSCONFIG
Hi Team,
I am working with UART section in launcXl. i have used RX and TX ISR for both SCIA and SCIB. J8-76pin of board is connected with J8-73. which are used as Tx and RX. When i send one byte 0xA4 SCIA, i received 0xA4 in same SCIB. But when i send 4 bytes, 0xA2, 0xA2, 0xA2, 0xA2 , supprisingly i am receiving 162d,209d, 209d 209d in buffer.
Initially i was using MOdbus poll and 485 hardware, i doubt about 485 hardware so i connect internally by SCIA and SCIB, result is same. first byte is always correct(i.e.162 in this case but if i change to 0xA2 to oxA3, rcved will be : 165d)) but other data will change.
::::::::::::::::::::::Configurations::::::::::::::::::
void mySCI0_init(){
SCI_clearInterruptStatus(mySCI0_BASE, SCI_INT_RXFF | SCI_INT_TXFF | SCI_INT_FE | SCI_INT_OE | SCI_INT_PE | SCI_INT_RXERR | SCI_INT_RXRDY_BRKDT | SCI_INT_TXRDY);
SCI_clearOverflowStatus(mySCI0_BASE);
SCI_disableFIFO(mySCI0_BASE);
SCI_resetChannels(mySCI0_BASE);
SCI_setConfig(mySCI0_BASE, DEVICE_LSPCLK_FREQ, mySCI0_BAUDRATE, (SCI_CONFIG_WLEN_8|SCI_CONFIG_STOP_ONE|SCI_CONFIG_PAR_NONE));
SCI_disableLoopback(mySCI0_BASE);
SCI_performSoftwareReset(mySCI0_BASE);
SCI_enableInterrupt(mySCI0_BASE, SCI_INT_RXRDY_BRKDT | SCI_INT_TXRDY);
SCI_enableModule(mySCI0_BASE);
}
void mySCI1_init(){
SCI_clearInterruptStatus(mySCI1_BASE, SCI_INT_RXFF | SCI_INT_TXFF | SCI_INT_FE | SCI_INT_OE | SCI_INT_PE | SCI_INT_RXERR | SCI_INT_RXRDY_BRKDT | SCI_INT_TXRDY);
SCI_clearOverflowStatus(mySCI1_BASE);
SCI_disableFIFO(mySCI1_BASE);
SCI_resetChannels(mySCI1_BASE);
SCI_setConfig(mySCI1_BASE, DEVICE_LSPCLK_FREQ, mySCI1_BAUDRATE, (SCI_CONFIG_WLEN_8|SCI_CONFIG_STOP_ONE|SCI_CONFIG_PAR_NONE));
SCI_disableLoopback(mySCI1_BASE);
SCI_performSoftwareReset(mySCI1_BASE);
SCI_enableInterrupt(mySCI1_BASE, SCI_INT_RXRDY_BRKDT | SCI_INT_TXRDY);
SCI_enableModule(mySCI1_BASE);
}
////////////////////5msISR ruitine////////////////////if(timer > 1000)
{
timer = 0;
ModbusA.txBuf[0] = 0xA2;
ModbusA.txBuf[1] = 0xA2;
ModbusA.txBuf[2] = 0xA2;
ModbusA.txBuf[3] = 0xA2;
ModbusA.txLen = 3;
ModbusA.txBusy = 1;
ModbusA.txIndex = 0;
SCI_writeCharBlockingFIFO(ModbusA.base, ModbusA.txBuf[0]);
}
//////////////////////RxISR Data Collection////////////////////
uint16_t data;
// Read all available bytes in FIFO
// Returns number of words in RX FIFO (0–16)
if(ModbusB.rxIndex > 6)
ModbusB.rxIndex = 0;
data = SCI_readCharNonBlocking(ModbusB.base);
ModbusB.rxBuf[ModbusB.rxIndex++] = (uint8_t)data;
/////////////////////////////////
/////////////////////Tx ISR////////////////////
__interrupt void INT_mySCI0_TX_ISR(void)
{
if(ModbusA.txBusy && ModbusA.txLen > 0) {
SCI_writeCharBlockingFIFO(ModbusA.base, ModbusA.txBuf[ModbusA.txIndex++]);
ModbusA.txLen--;
if(ModbusA.txLen == 0)
{
ModbusA.txBusy = false;
}
}
SCI_clearInterruptStatus(ModbusA.base, SCI_INT_TXRDY);
Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP9);
}
