David Siorpaes
/
Nucleo_blinky_with_registers
Blinky LED example with registers for PoliMI
Diff: main.cpp
- Revision:
- 0:0dd8ec2326be
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Fri Mar 18 11:33:16 2016 +0000 @@ -0,0 +1,25 @@ +#include "mbed.h" + +int main(){ + volatile int i; + + /* Enable RCC GPIOA clock */ + *((uint32_t*)0x40023830) |= (1<<0); + + /* Set PA5 as digital output */ + *((uint32_t*)0x40020000) |= (1<<10); + + while(1) { + /* PA5 on */ + *((uint32_t*)0x40020014) |= (1<<5); + + /* Delay */ + for(i = 5000000; i; i--); + + /* PA5 off */ + *((uint32_t*)0x40020014) &= ~(1<<5); + + /* Delay */ + for(i = 5000000; i; i--); + } +}