Serial1 on LaunchPad Stellaris: UART(1) is active on PC_4 / PC_5 but not on PB_0 / PB_1

[Rei Vilo 695]

UART(1) is active on PC_4 / PC_5 but not on PB_0 / PB_1.

 

The Stellaris® LM4F120H5QR Microcontroller Datasheet (lm4f120h5qr) mentions those pins, for example on tables 21-5 and 21-6, consistent with the pins map I've released.

 

But why the pins aren't defined on HardwareSerial.cpp?

//*****************************************************************************

//

// The list of UART GPIO configurations.

//

//*****************************************************************************

static const unsigned long g_ulUARTConfig[8][2] =

{

{GPIO_PA0_U0RX, GPIO_PA1_U0TX}, {GPIO_PC4_U1RX, GPIO_PC5_U1TX},

{GPIO_PD6_U2RX, GPIO_PD7_U2TX}, {GPIO_PC6_U3RX, GPIO_PC7_U3TX},

{GPIO_PC4_U4RX, GPIO_PC5_U4TX}, {GPIO_PE4_U5RX, GPIO_PE5_U5TX},

{GPIO_PD4_U6RX, GPIO_PD5_U6TX}, {GPIO_PE0_U7RX, GPIO_PE1_U7TX}

};

Is there a reason?

 

How to use Serial1 on PB_0 / PB_1? I need then to the library for the 4D Systems screen.

 

This is a cross-post with the 43oh forum.

[monpetit 0]

I don't know the reason.

But you can use Serial1 on PORTB with setting pins like this,

void setup()
{
    Serial1.setPins(UART1_PORTB);
    Serial1.begin(115200);  
}

[L.R.A 78]

How is serial1 diferent from normal serial?

[Rei Vilo 695]

Serial is for the USB port. See my pins map