#include "iostm8l151f3.h"

void clock_init(){
  CLK_CKDIVR = 1;
  CLK_ICKCR |= (1<<0);
  while(!(CLK_ICKCR&(1<<1)));
}

void mcu_usart_init(unsigned int divider){
  SYSCFG_RMPCR1 |= (1<<4); //Remap to PA2, PA3
 
  PA_DDR_bit.DDR2 = 1; // Output
  PA_CR1_bit.C12  = 1; // Push-pull
 
  CLK_PCKENR1_bit.PCKEN10 = 1; //USART1 On
   
  (void) USART1_SR;
  (void) USART1_DR;

  USART1_BRR2 = (unsigned char) (((divider >> 8) & 0xF0) | (divider & 0x0F));
  USART1_BRR1 = (unsigned char) (divider >> 4);
 
  USART1_CR2_bit.REN=1;
  USART1_CR2_bit.TEN=1;
   
}

int main( void ){
  clock_init();
  mcu_usart_init(208); //Divider for 8MHz to 34800
 
  PC_DDR_bit.DDR4 = 1; // Output
  PC_CR1_bit.C14  = 1; // Push-pull
  PC_CR2_bit.C24  = 0; // 2MHz output speed
 
 
 
  while(1){
   
    while(!(USART1_SR_bit.TXE));
    USART1_DR = 0xAA;
   
    PC_ODR ^= (1<<4);
    for(unsigned long i=0; i<200000; i++);
 
  }
}