Hi Alexander,

There is a help menu inside the config2 program that gives an overview of how to use the tool.  If you can give more specific information about the error I may be able to help you.

Also consider the configurator tool which is part of Simplicity Studio.  This tool is newer and is better supported than config2.

Regards,

Joe

The new 'hardware configurator' tool may don't support C8051F340.

https://www.silabs.com/community/mcu/8-bit/knowledge-base.entry.html/2015/08/20/config_2_supportfor-ccMc

I do choose my board:

I am beginning from PortIO configuration:

port P0.4 (TX) set to push-pull and UART1 shift to P0.4 & P0.5

Oscillators:

and

next UART1

and Watchdog Timer

as a result a have next config for my UART1

/////////////////////////////////////
//  Generated Initialization File  //
/////////////////////////////////////

#include "compiler_defs.h"
#include "C8051F340_defs.h"

// Peripheral specific initialization functions,
// Called from the Init_Device() function
void PCA_Init()
{
    PCA0MD    &= ~0x40;
    PCA0MD    = 0x00;
}

void UART_Init()
{
    SBRLL1    = 0x8F;
    SBRLH1    = 0xFD;
    SCON1     = 0x10;
    SBCON1    = 0x43;
}

void Port_IO_Init()
{
    // P0.0  -  Skipped,     Open-Drain, Digital
    // P0.1  -  Skipped,     Open-Drain, Digital
    // P0.2  -  Skipped,     Open-Drain, Digital
    // P0.3  -  Skipped,     Open-Drain, Digital
    // P0.4  -  TX1 (UART1), Push-Pull,  Digital
    // P0.5  -  RX1 (UART1), Open-Drain, Digital
    // P0.6  -  Unassigned,  Open-Drain, Digital
    // P0.7  -  Unassigned,  Open-Drain, Digital

    P0MDOUT   = 0x10;
    P0SKIP    = 0x0F;
    XBR1      = 0x40;
    XBR2      = 0x01;
}

void Oscillator_Init()
{
    OSCICN    = 0x83;
}

// Initialization function for device,
// Call Init_Device() from your main program
void Init_Device(void)
{
    PCA_Init();
    UART_Init();
    Port_IO_Init();
    Oscillator_Init();
}

add main

//-----------------------------------------------------------------------------
// MAIN Routine
//-----------------------------------------------------------------------------

void main (void) 
{
   unsigned char inputcharacter;       // Used to store character from UART

   PCA0MD &= ~0x40;                    // WDTE = 0 (clear watchdog timer 
                                       // enable)
    UART_Init();
    Port_IO_Init();
    Oscillator_Init();

   while (1)
   {
      printf ("\nEnter character: ");
      inputcharacter = getkey ();
      printf ("\nCharacter entered : %c",inputcharacter);
      printf ("\n      Value in Hex: %bx",inputcharacter);

   }
}

Hi,

maybe try Port init before Uart init ?

Do you see any activity on the pins if you view it with an oscilloscope?

Do you see any activity if, instead of using printf you write directly to the SBUF1 register?

Regards,

Joe

Disabling the watchdog timer within the main function may be too late, see: https://www.silabs.com/community/mcu/8-bit/knowledge-base.entry.html/2014/07/10/mcu_constantly_reset-2DbM