/******************************************************************************
 * File:        MCU_UART_priv.h
 * Component:   MCU_UART
 * Description: Private header — control struct and extern config array.
 *
 * Layer:       MCU (hardware abstraction) - internal use only
 *****************************************************************************/

#ifndef MCU_UART_PRIV_H
#define MCU_UART_PRIV_H

#include "MCU_UART.h"
#include "MCU_UART_cfg.h"

extern const MCU_UART_tstrConfig MCU_UART_astrConfig[MCU_UART_NUM_INSTANCES];

typedef struct
{
    /* TX state */
    const u8    *apu8TxBuffer[MCU_UART_NUM_INSTANCES];
    u16          au16TxLength[MCU_UART_NUM_INSTANCES];
    u16          au16TxIndex[MCU_UART_NUM_INSTANCES];
    STD_tBool    abTxBusy[MCU_UART_NUM_INSTANCES];
    s8           as8TxDmaChannel[MCU_UART_NUM_INSTANCES];

    /* RX ring buffer — filled by ISR or DMA in the background */
    u8           aau8RxBuffer[MCU_UART_NUM_INSTANCES][MCU_UART_RX_BUFFER_SIZE]
                     __attribute__((aligned(MCU_UART_RX_BUFFER_SIZE)));
    u16          au16RxHead[MCU_UART_NUM_INSTANCES];
    u16          au16RxTail[MCU_UART_NUM_INSTANCES];
    s8           as8RxDmaChannel[MCU_UART_NUM_INSTANCES];
} MCU_UART_tstrControl;

#endif /* MCU_UART_PRIV_H */