stm32f405 not running

Posted on March 14, 2014 at 00:33

Dear all,

i am trying some initial code on a

stm32f405 that i could finally program.

First thing i was wandering is if i can run (for test) straight with the internal HSI 16Mhz.

Init code is from std stm32 library.

I try to debug with a square wave, but i don't see nothing with scope still.

void gpio_init ()

{

        GPIO_InitTypeDef io = {0};

        //

        // Initialise RCC (reset and clock control) to set clock to

        // the peripheral (port A).

        //

        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

        io.GPIO_Pin = GPIO_Pin_4;

        io.GPIO_Mode = GPIO_Mode_OUT;

        io.GPIO_Speed = GPIO_Speed_25MHz;

        io.GPIO_OType = GPIO_OType_PP;

    io.GPIO_PuPd = GPIO_PuPd_NOPULL;

        GPIO_Init(GPIOA, &io);

        while (1)

        {

                GPIOA->BSRRL = GPIO_Pin_4;

                GPIOA->BSRRH = GPIO_Pin_4;

        }

}

every help is appreciated.