Hi!

I have a problem with the ADC, I want to switch between references, sometimes I want to use Vdd/Vss and sometimes Vref+ and Vref- but without hardware configuration change, during program execution. Is this posible? what is the register bit where I can choose the reference, or it doesn´t exists? I have worked with other MCUs and they have this option.

Another thing, I am trying to simulate my program with the simulator and the timer interrupt doesn´t work fine, I have tried a lot of configurations but nothing, I thing that this may work:

  
    CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER4, ENABLE); 
    TIM4_TimeBaseInit(TIM4_PRESCALER_1, 0xFF);
    TIM4_SetCounter(0x00);
    TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);
    TIM4_Cmd(ENABLE);

I try different breakpoints an I realize that the counter registers don´t count, so is not the interrupt, I thing I am doing something wrong but I don´t know what!, pleas help me

Thank you!!