---

#include "MDR32Fx.h"
#include "MDR32F9Qx_port.h"
#include "MDR32F9Qx_rst_clk.h"
#include "MDR32F9Qx_uart.h"

#define LED_PORT    MDR_PORTA
#define RX_BUF_SIZE 64

volatile uint8_t rx_buf[RX_BUF_SIZE];
volatile uint8_t rx_head = 0;
volatile uint8_t rx_tail = 0;
volatile uint8_t rx_count = 0;

void init_leds(void) {
    RST_CLK_PCLKcmd(RST_CLK_PCLK_PORTA, ENABLE);
    PORT_InitTypeDef PortInit;
    PortInit.PORT_Pin   = 0xFF;
    PortInit.PORT_OE    = PORT_OE_OUT;
    PortInit.PORT_FUNC  = PORT_FUNC_PORT;
    PortInit.PORT_MODE  = PORT_MODE_DIGITAL;
    PortInit.PORT_SPEED = PORT_SPEED_SLOW;
    PORT_Init(LED_PORT, &PortInit);
    PORT_Write(LED_PORT, 0x00);
}

void init_uart(void) {
    RST_CLK_PCLKcmd(RST_CLK_PCLK_PORTB, ENABLE);
    RST_CLK_PCLKcmd(RST_CLK_PCLK_UART1, ENABLE);
    
    PORT_InitTypeDef PortInit;
    PortInit.PORT_Pin   = PORT_Pin_5 | PORT_Pin_6;
    PortInit.PORT_OE    = PORT_OE_IN;
    PortInit.PORT_FUNC  = PORT_FUNC_ALTER;
    PortInit.PORT_MODE  = PORT_MODE_DIGITAL;
    PortInit.PORT_SPEED = PORT_SPEED_FAST;
    PORT_Init(MDR_PORTB, &PortInit);
    
    UART_InitTypeDef uart;
    uart.UART_BaudRate      = 57600;
    uart.UART_WordLength    = UART_WordLength8b;
    uart.UART_StopBits      = UART_StopBits1;
    uart.UART_Parity        = UART_Parity_No;
    uart.UART_FIFOMode      = UART_FIFOMode_ON;
    uart.UART_HardwareFlowControl = UART_HardwareFlowControl_None;
    
    UART_Init(MDR_UART1, &uart);
    
    UART_ITConfig(MDR_UART1, UART_IT_RX, ENABLE);
    NVIC_EnableIRQ(UART1_IRQn);
    
    UART_Cmd(MDR_UART1, ENABLE);
}

void UART1_IRQHandler(void) {
    if (UART_GetITStatus(MDR_UART1, UART_IT_RX)) {
        UART_ClearITPendingBit(MDR_UART1, UART_IT_RX);
        uint8_t data = UART_ReceiveData(MDR_UART1);
        
        rx_buf[rx_head] = data;
        rx_head = (rx_head + 1) % RX_BUF_SIZE;
        if (rx_count < RX_BUF_SIZE) rx_count++;
    }
}

uint8_t get_byte_from_buf(uint8_t index) {
    return rx_buf[(rx_tail + index) % RX_BUF_SIZE];
}

int main(void) {
    init_leds();
    init_uart();
    
    while (1) {
        while (rx_count >= 7) {
            if (get_byte_from_buf(0) == 0xFF &&
                get_byte_from_buf(1) == 0xFE &&
                get_byte_from_buf(2) == 0xFF &&
                get_byte_from_buf(3) == 0x88 &&
                get_byte_from_buf(4) == 0x15) {
                
                uint8_t data = get_byte_from_buf(5);
                uint8_t crc  = get_byte_from_buf(6);
                
                uint8_t sum = 0;
                for (int i = 0; i < 7; i++) sum += get_byte_from_buf(i);
                
                if (sum == 0) {
                    PORT_Write(LED_PORT, data);
                }
                
                rx_tail = (rx_tail + 7) % RX_BUF_SIZE;
                rx_count -= 7;
            } else {
                rx_tail = (rx_tail + 1) % RX_BUF_SIZE;
                rx_count--;
            }
        }
        // Можно добавить небольшую задержку, чтобы не нагружать процессор
        for (volatile int i = 0; i < 10000; i++);
    }
}