PIC32MX using both serial ports UART1 and UART2

[celsoscomparim]

Hello, happy new year,
I'm trying to use both serial ports UART1 and 2 at the "same time" in the microcontroller PIC32MX150F128B, but only UART1 work OK, the UART2 didn't work.
When I configure UART1 or UART2 individualy, works fine, but if I configure both, as the code below, UART2 doesn't work.

Please, could you help me?

Code: Select all

void main() {
   JTAGEN_bit = 0;
   ANSELA = 0;
   ANSELB = 0;
   TRISA = 0;
   TRISB = 0;
   LATA = 0;
   LATB = 0;

   Unlock_IOLOCK();
   PPS_Mapping(_RPB3, _OUTPUT, _U1TX);
   PPS_Mapping(_RPB2, _INPUT, _U1RX);
   PPS_Mapping(_RPB10, _OUTPUT, _U2TX);
   PPS_Mapping(_RPB11, _INPUT, _U2RX);
   Lock_IOLOCK();
   
   I2C1_Init(100000);
   UART1_Init(115200);
   UART2_Init(115200);
   delay_ms(100);
   while(1){
      UART1_Write(0xCD);
      UART2_Write(0xAB);
      delay_ms(250);
   }
}

[Aleksandar.Mitrovic]

Hi,

Did you try to use UART_Set_Active?

Kind regards,
Aleksandar

[celsoscomparim]

Hi, thanks for the answer!

Yes, I tried.

The problem is in the MikroC library, because if I replace:

Code: Select all

   Unlock_IOLOCK();
   PPS_Mapping(_RPB3, _OUTPUT, _U1TX);
   PPS_Mapping(_RPB2, _INPUT, _U1RX);
   PPS_Mapping(_RPB10, _OUTPUT, _U2TX);
   PPS_Mapping(_RPB11, _INPUT, _U2RX);
   Lock_IOLOCK();

By:

Code: Select all

trisb.f2=1; trisb.f11=1;
   U1RXR = 0b00000100;
   U2RXR = 0b00000011;
   RPB3R = 0b00000001;
   RPB10R = 0b00000010;

Both UARTs works Ok.
Am I right?

Thanks.

[Aleksandar.Mitrovic]

Hi,

If you set in the Edit Project bits for PPS correctly you can try it like this:

Code: Select all

 Unlock_IOLOCK();
   PPS_Mapping(_RPB3, _OUTPUT, _U1TX);
   PPS_Mapping(_RPB2, _INPUT, _U1RX);
   PPS_Mapping(_RPB10, _OUTPUT, _U2TX);
   PPS_Mapping(_RPB11, _INPUT, _U2RX);
 Lock_IOLOCK();
   TRISB.F3 = 0;
   TRISB.F2 = 1; 
   TRISB.F10=0;
   TRISB.F11=1;

Note that at this moment we do not have this MCU for test, it will be good if you can do some test for us.
Therefore I suggest you to open ticket on our Help desk and we can start from there if this above do not work.
Is that OK with you?

Kind regards,
Aleksandar