//! \file triceUart.c
//! \author Thomas.Hoehenleitner [at] seerose.net
//!     //////////////////////////////////////////////////////////////////////////
#include "trice.h"
#include <stdint.h>
#include <stdlib.h>

#if TRICE_DEFERRED_UARTA == 1 && TRICE_OFF == 0

    #include "triceUart.h" // User has to provide this hardeware specific file, see examples folders.

//! triceOutBufferUartA points into the double or ring buffer to the next (encoded) trice package.
static const uint8_t *triceOutBufferUartA;

//! triceOutCountUartA is the not yet transmitted byte count after a TriceNonBlockingWriteUartA() call.
static size_t triceOutCountUartA = 0;

//! triceOutIndexUartA is the triceOutBufferUartA offset to the next to transmit byte.
static unsigned triceOutIndexUartA = 0;

//! TriceNonBlockingWriteUartA registers a buffer for TRICE_UARTA transmission.
//! \param buf is byte buffer start.
//! \param nByte is the number of bytes to transfer
void TriceNonBlockingWriteUartA(const void *buf, size_t nByte)
{
#if TRICE_CGO == 1 // automated tests
    TriceWriteDeviceCgo(buf, nByte);
#else // #if TRICE_CGO == 1// automated tests
    TRICE_ENTER_CRITICAL_SECTION
#if 1
        triceOutBufferUartA = buf;
#else
    static uint8_t t[TRICE_DEFERRED_BUFFER_SIZE / 2]; // todo: find a better solution to avoid RAM wasting
    memcpy(t, buf, nByte);
    triceOutBufferUartA = t;
#endif
    triceOutIndexUartA = 0;
    triceOutCountUartA = nByte;
    triceEnableTxEmptyInterruptUartA(); // triceTriggerTransmitUartA();
    TRICE_LEAVE_CRITICAL_SECTION
#endif // #else // #if TRICE_CGO == 1// automated tests
}

//! TriceOutDepthUartA returns the amount of bytes not written yet to UARTB.
unsigned TriceOutDepthUartA(void)
{
    unsigned depth;
    TRICE_ENTER_CRITICAL_SECTION
        depth = triceOutCountUartA - triceOutIndexUartA;
    TRICE_LEAVE_CRITICAL_SECTION
    return depth;
}

//! triceNextUint8UartA returns the next trice byte for transmission to TRICE_UARTA.
TRICE_INLINE uint8_t triceNextUint8UartA(void)
{
    uint8_t c;
    TRICE_ENTER_CRITICAL_SECTION
        c = triceOutBufferUartA[triceOutIndexUartA++];
    TRICE_LEAVE_CRITICAL_SECTION
    return c;
}

//! triceServeTransmitUartA must be called cyclically to proceed ongoing write out.
//! A good place is UARTA ISR.
void triceServeTransmitUartA(void)
{
    TRICE_ENTER_CRITICAL_SECTION
        triceTransmitData8UartA(triceNextUint8UartA());
    if (0 == TriceOutDepthUartA())   // no more bytes
    {
        triceDisableTxEmptyInterruptUartA();
    }
    TRICE_LEAVE_CRITICAL_SECTION
}

//  // triceTriggerTransmitUartA must be called cyclically to initialize write out.
//  void triceTriggerTransmitUartA(void){
//      if( TriceOutDepthUartA() && triceTxDataRegisterEmptyUartA() ){
//          triceEnableTxEmptyInterruptUartA(); // next bytes
//      }
//  }

#endif // #if TRICE_DEFERRED_UARTA == 1

#if TRICE_DEFERRED_UARTB == 1

    #include "triceUart.h" // User has to provide this hardeware specific file, see examples folders.

//! triceOutBufferUartB holds the uart out buffer address.
static const uint8_t *triceOutBufferUartB;

//! triceOutCountUartB holds th uarts out buffer size.
static size_t triceOutCountUartB = 0;

//! triceOutIndexUartB is the next to transmit byte index.
static unsigned triceOutIndexUartB = 0;

//! TriceNonBlockingWriteUartB registers a buffer for TRICE_UARTB transmission.
//! \param buf is byte buffer start.
//! \param nByte is the number of bytes to transfer
void TriceNonBlockingWriteUartB(const void *buf, size_t nByte)
{
#if TRICE_CGO == 1 // automated tests
    TriceWriteDeviceCgo(buf, nByte);
#else  // #if TRICE_CGO == 1// automated tests
    triceOutBufferUartB = buf;
    triceOutIndexUartB = 0;
    triceOutCountUartB = nByte;
    triceTriggerTransmitUartB();
#endif // #else // #if TRICE_CGO == 1// automated tests
}

//! TriceOutDepthUartB returns the amount of bytes not written yet to UARTB.
unsigned TriceOutDepthUartB(void)
{
    // unsigned depthRtt0 = 0; -> assuming RTT is fast enough
    unsigned depth = triceOutCountUartB - triceOutIndexUartB;
    return depth;
}

//! triceNextUint8UartB returns the next trice byte for transmission to TRICE_UARTA.
TRICE_INLINE uint8_t triceNextUint8UartB(void)
{
    return triceOutBufferUartB[triceOutIndexUartB++];
}

//! triceServeTransmitUartB must be called cyclically to proceed ongoing write out.
//! A good place is UARTA ISR.
void triceServeTransmitUartB(void)
{
    triceTransmitData8UartB(triceNextUint8UartB());
    if (0 == TriceOutDepthUartB())   // no more bytes
    {
        triceDisableTxEmptyInterruptUartB();
    }
}

// triceTriggerTransmitUartB must be called cyclically to initialize write out.
void triceTriggerTransmitUartB(void)
{
    if (TriceOutDepthUartB() && triceTxDataRegisterEmptyUartB())
    {
        triceEnableTxEmptyInterruptUartB(); // next bytes
    }
}

#endif // #if TRICE_DEFERRED_UARTB == 1 && TRICE_OFF == 0