#include "stm8s.h"
#include "stm8s_uart1.h"
#include "stm8s_gpio.h"
#include "stdio.h"
#include "stm8s_tim4.h"
#include <string.h>
#include <stdlib.h>

#define PUTCHAR_PROTOTYPE char putchar (char c)
#define GETCHAR_PROTOTYPE char getchar (void)

void putchars(const char* chars, size_t len);

uint32_t us_val = 0;

void print_u16(uint16_t a){
    char c[5];
    c[4] = '\0';
    c[3] = (a % 10) + '0'; a/=10;
    c[2] = (a % 10) + '0'; a/=10;
    c[1] = (a % 10) + '0'; a/=10;
    c[0] = (a % 10) + '0';
    putchars(c, 5);
}

void uDelay(uint32_t us)
{
    us_val = us;
    while(us_val != 0);
}

void decrement_timer(){
    if (us_val != 0)
  {
    --us_val;
  }
}

void tim4_conf(){
  TIM4_DeInit();
    TIM4_TimeBaseInit(TIM4_PRESCALER_16, 1);
    TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);
    enableInterrupts();
    TIM4_Cmd(ENABLE);
}

void main(void) {

    char ans;
    /*High speed internal clock prescaler: 1*/
    CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);

    UART1_DeInit();

    UART1_Init((uint32_t)115200, UART1_WORDLENGTH_8D, UART1_STOPBITS_1, UART1_PARITY_NO,
                            UART1_SYNCMODE_CLOCK_DISABLE, UART1_MODE_TXRX_ENABLE);

    tim4_conf();


    while (1)
    {

        putchars("hello", 5);
        putchar('\n');
        uDelay(1000000);
    }

}

/**
  * @brief Retargets the C library printf function to the UART.
  * @param c Character to send
  * @retval char Character sent
  */
PUTCHAR_PROTOTYPE
{
  /* Write a character to the UART1 */
  UART1_SendData8(c);
  /* Loop until the end of transmission */
  while (UART1_GetFlagStatus(UART1_FLAG_TXE) == RESET);

  return (c);
}

void putchars(const char* chars, size_t len){
    uint8_t i;
    for(i = 0; i < len; ++i){
        putchar(chars[i]);
    }
}

/**
  * @brief Retargets the C library scanf function to the USART.
  * @param None
  * @retval char Character to Read
  */
GETCHAR_PROTOTYPE
{
#ifdef _COSMIC_
  char c = 0;
#else
  int c = 0;
#endif
  /* Loop until the Read data register flag is SET */
  while (UART1_GetFlagStatus(UART1_FLAG_RXNE) == RESET);
    c = UART1_ReceiveData8();
  return (c);
}

void assert_failed(u8* file, u32 line) {
    /* User can add his own implementation to report the file name and line number,
    ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    /* Infinite loop */
    while (1) {
    }
}