Posted on March 19, 2012 at 01:50Hello,
I'm working with the STM32F4-Discovery Board and the atollic TrueStudio Lite and I'm a absolutely Newbie with that.
When I was excercising with de GPIO's i configured all Port Pins of GPIOA as outputs, and wrote this to the flash.
Since then I can't communicate with the board, maybe because the JTAG/SWD Port ist using the GPIOA Pins. But in the Reference Manual I found this:
The JTAG pins are in input pull-up/pull-down after reset:
â—� PA15: JTDI in pull-up
â—� PA14: JTCK in pull-down
â—� PA13: JTMS in pull-up
â—� PB4: NJTRST in pull-up
Can some one tell my what I can do now?
Marcel
PS: My Code:
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable the GPIO_LED Clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
/* Configure the GPIO_LED pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIOA->BSRRL = GPIO_Pin_All;
