Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: C2000WARE
Tool/software:
Hello,
I am stuck on configuring SCI on this controller, I have GPIO 18 and 19 configured as Tx and Rx respectively following the user manual. However, When I try to transmit information from the board, nothing is sent out and I can confirm with my picoscope that the pin goes high (3.3V) yet does not send any messages.
Here is my code for setting up the GPIO pins for SCI B
void ConfigIoForSCI(void)
{
// Receive Rx physical pin 3
GPIO_setMasterCore(19,GPIO_CORE_CPU1);
GPIO_setPinConfig(GPIO_19_SCIRXDB);
GPIO_setDirectionMode(19, GPIO_DIR_MODE_IN); // IN for Rx receive
GPIO_setPadConfig(19, GPIO_PIN_TYPE_STD);
GPIO_setQualificationMode(19, GPIO_QUAL_ASYNC);
//Transmit Tx physical pin 4
GPIO_setMasterCore(18,GPIO_CORE_CPU1);
GPIO_setPinConfig(GPIO_18_SCITXDB);
GPIO_setDirectionMode(18, GPIO_DIR_MODE_OUT); // OUT for Tx transmit
GPIO_setPadConfig(18, GPIO_PIN_TYPE_STD);
GPIO_setQualificationMode(18, GPIO_QUAL_ASYNC);
}
Here is my code for initializing SCI B
void initSCIB()
{
SysCtl_enablePeripheral(SYSCTL_PERIPH_CLK_SCIB); // enable SCI clock
SCI_performSoftwareReset(SCIB_BASE);
SCI_setConfig(SCIB_BASE, DEVICE_LSPCLK_FREQ, 115200, (SCI_CONFIG_WLEN_8| SCI_CONFIG_PAR_NONE | SCI_CONFIG_STOP_ONE ));
SCI_resetChannels(SCIB_BASE);
SCI_resetRxFIFO(SCIB_BASE);
SCI_resetTxFIFO(SCIB_BASE);
SCI_disableFIFO(SCIB_BASE);
//SCI_enableFIFO(SCIB_BASE); // for use with writeCharBlockingNonFifo()
SCI_enableModule(SCIB_BASE); // enable SCI module
SCI_enableTxModule(SCIB_BASE); // enable transmit pin --> physical pin 4
SCI_enableRxModule(SCIB_BASE); // enable receive pin --> physical pin 3
}
U16 testnum = 5775; // 5775 in decimal --> 168F in hexadecimal
int mask = 255;
Here is my code for attempting to send out a test number/message through SCI B.
void sciTransmit()
{
//SCI_writeCharBlockingFIFO(SCIB_BASE, 0x55);
//SCI_writeCharBlockingFIFO(SCIB_BASE, 0x55);
// SCI_writeCharBlockingFIFO(SCIB_BASE, (testnum & mask));
// SCI_writeCharBlockingFIFO(SCIB_BASE, ((testnum >> 8 )& mask));
SCI_writeCharBlockingNonFIFO(SCIB_BASE, 0x55);
SCI_writeCharBlockingNonFIFO(SCIB_BASE, (testnum & mask));
SCI_writeCharBlockingNonFIFO(SCIB_BASE, ((testnum >> 8 )& mask));
//SCI_writeCharNonBlocking(SCIB_BASE, (testnum & mask));
//SCI_writeCharNonBlocking(SCIB_BASE, ((testnum >> 8 )& mask));
}
Here is what I see when I hook up a probe to the Tx pin on the board. I assume it is set up correctly, but I am unsure what I am doing wrong, I am relatively new to this. Any suggestions are appreciated!
