uart_interupt.c

#include "stm8s.h"
#include "milis.h"
#include <stdio.h>

#define LED_PORT GPIOC
#define LED_PIN  GPIO_PIN_3
#define LED_ON   GPIO_WriteHigh(LED_PORT, LED_PIN);
#define LED_OFF  GPIO_WriteLow(LED_PORT, LED_PIN);
#define LED_FLIP GPIO_WriteReverse(LED_PORT, LED_PIN);

#define BTN_PORT GPIOE
#define BTN_PIN  GPIO_PIN_4
#define BTN_PUSH (GPIO_ReadInputPin(BTN_PORT, BTN_PIN)==RESET) 

int8_t speed = 0;
int32_t time = 0;

void setup(void)
{
    CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); // taktovat MCU na 16MHz

    init_milis();

    /*----          GPIO setup           ---------*/
    GPIO_Init(LED_PORT, LED_PIN, GPIO_MODE_OUT_PP_LOW_SLOW);

    /*----          UART1 setup           ---------*/
    UART1_DeInit();         // smažu starou konfiguraci
    UART1_Init((uint32_t) 115200,
               UART1_WORDLENGTH_8D,
               UART1_STOPBITS_1,
               UART1_PARITY_NO,
               UART1_SYNCMODE_CLOCK_DISABLE,
               UART1_MODE_TXRX_ENABLE);
    UART1_ITConfig(UART1_IT_RXNE_OR, ENABLE);   // povolí přerušení UART1 Rx
    enableInterrupts();
    UART1_Cmd(DISABLE); // zakáže UART1
    UART1_Cmd(ENABLE);  // povolí UART1
}


void main(void)
{
    setup();

    /*------  nekonená smyčka    ---*/
    while(1) {
        if (milis()-time > speed * 100) {
            time = milis();
            LED_FLIP;
        }
    }
}



INTERRUPT_HANDLER(UART1_RX_IRQHandler, 18)
{
    char c = UART1_ReceiveData8();
    UART1_SendData8(c);
    speed++;
}


#ifdef _RAISONANCE_
  #define PUTCHAR_PROTOTYPE int putchar (char c)
  #define GETCHAR_PROTOTYPE int getchar (void)
#elif defined (_COSMIC_)
  #define PUTCHAR_PROTOTYPE char putchar (char c)
  #define GETCHAR_PROTOTYPE char getchar (void)
#elif defined (_SDCC_)         /* SDCC patch: ensure same types as stdio.h */
  #if SDCC_VERSION >= 30605      // declaration changed in sdcc 3.6.5 (officially with 3.7.0)
    #define PUTCHAR_PROTOTYPE int putchar(int c)
    #define GETCHAR_PROTOTYPE int getchar(void)
  #else
    #define PUTCHAR_PROTOTYPE void putchar(char c)
    #define GETCHAR_PROTOTYPE char getchar(void)
  #endif 
#else /* _IAR_ */
  #define PUTCHAR_PROTOTYPE int putchar (int c)
  #define GETCHAR_PROTOTYPE int getchar (void)
#endif /* _RAISONANCE_ */

/* ***************   Funkce    ******************** */


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);
}

/**
  * @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);
}