Hi,
I have attached the document with register values before UART initialized and after initialized.
Jumper settings
J23: 1-2 and 3-4 connected(SCI1_TX to UART1_ELEV_TX and SCI2_TX to OpenSDA_RX)
J24:1-2 and 3-4 connected(SCI1_RX to UART1_ELEV_RX and SCI2_RX to OpenSDA_TX)
Read is not happening on "ttyb:".UART1 RX pin is continuously fed with strings at 4800 baudrate , Parity:None, Stop bit:1 and No flow control.
below is the code:
#define NMEA_MAX_SIZE 256
#define NMEA_PORT_CHANNEL "ttyb:"
UART_task(){
bool disable_rx = FALSE;
int32_t baud = 4800;
int32_t result;
int32_t ser_opts = IO_SERIAL_NON_BLOCKING;
int32_t stop_bits=IO_SERIAL_STOP_BITS_1;
int32_t data_bits=8;
int32_t parity=IO_SERIAL_PARITY_NONE;
nmea_port_dev = fopen(NMEA_PORT_CHANNEL,NULL);
if(nmea_port_dev!=NULL){
printf("dev pointer value:%d",nmea_port_dev);
}
ioctl(nmea_port_dev, IO_IOCTL_SERIAL_SET_FLAGS, &ser_opts);
ioctl(nmea_port_dev, IO_IOCTL_SERIAL_DISABLE_RX, &disable_rx );
ioctl(nmea_port_dev, IO_IOCTL_SERIAL_SET_BAUD, &baud);
ioctl(nmea_port_dev, IO_IOCTL_SERIAL_SET_DATA_BITS,&data_bits);
ioctl(nmea_port_dev, IO_IOCTL_SERIAL_SET_STOP_BITS,&stop_bits);
ioctl(nmea_port_dev, IO_IOCTL_SERIAL_SET_PARITY,&parity);
while(1)
{
memset(NMEA_text, 0, NMEA_size);
result=fread(NMEA_text,1,5, nmea_port_dev);//Trying to read length of 5
if(result>0){
NMEA_text[result+1]='\0';
write( nmea_port_dev, NMEA_text, strlen(NMEA_text) );
fflush(nmea_port_dev);
ioctl(nmea_port_dev, IO_IOCTL_SERIAL_WAIT_FOR_TC,NULL);
memset(NMEA_text, 0, NMEA_size);
}
else{
write( nmea_port_dev, data_buffer, strlen(data_buffer) );
}
}
}
