Posted on April 14, 2015 at 16:51How can I disable RTC 512Hz signal and return PC13 as I/O ??
I programed the PC13 as ''GPIO_AF_RTC_50Hz'' to calibrate the 512Hz signal of internal RTC, but now I cant disable it to use PC13 as I/O, The STM32F205 doesn´t disable 512Hz and reprogram to I/O
My routine to program as 512Hz is :
GPIO_PinAFConfig (GPIOC, GPIO_PinSource13, GPIO_AF_RTC_50Hz); // GPIO_AF_RTC_AF1 Alternate Function RTC_AF1 (Calibrar RTC com saida em PC13 = 512 Hz)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
My routine to reprogram as I/O is below:
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
