/******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2016 STMicroelectronics</center></h2>
  *
  * Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/myliberty
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
  * AND SPECIFICALLY DISCLAIMING THE IMPLIED WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
******************************************************************************/
/*
 *      PROJECT:   
 *      $Revision: $
 *      LANGUAGE:  ANSI C
 */

/*! \file
 *
 *  \author 
 *
 *  \brief Debug log output utility implementation.
 *
 */

/*
******************************************************************************
* INCLUDES
******************************************************************************
*/
#include "usart.h"
#include "logger.h"
#include "st_errno.h"
#include "utils.h"
#include <string.h>
#include <stdarg.h>
#include <stdio.h>

/*
******************************************************************************
* LOCAL DEFINES
******************************************************************************
*/

      
#if (USE_LOGGER == LOGGER_ON)

#define MAX_HEX_STR         4
#define MAX_HEX_STR_LENGTH  128
char hexStr[MAX_HEX_STR][MAX_HEX_STR_LENGTH];
uint8_t hexStrIdx = 0;
#endif /* #if USE_LOGGER == LOGGER_ON */

#define USART_TIMEOUT          1000

UART_HandleTypeDef *pLogUsart = 0;
uint8_t logUsartTx(uint8_t *data, uint16_t dataLen);

/**
  * @brief  This function initalize the UART handle.
	* @param	husart : already initalized handle to USART HW
  * @retval none :
  */
void logUsartInit(UART_HandleTypeDef *husart)
{
    pLogUsart = husart;
}

/**
  * @brief  This function Transmit data via USART
	* @param	data : data to be transmitted
	* @param	dataLen : length of data to be transmitted
  * @retval ERR_INVALID_HANDLE : in case the SPI HW is not initalized yet
  * @retval others : HAL status
  */
uint8_t logUsartTx(uint8_t *data, uint16_t dataLen)
{
  if(pLogUsart == 0)
    return ERR_INVALID_HANDLE;

  return HAL_UART_Transmit(pLogUsart, data, dataLen, USART_TIMEOUT);
}

int logUsart(const char* format, ...)
{
  #if (USE_LOGGER == LOGGER_ON)
  {  
    #define LOG_BUFFER_SIZE 256
    char buf[LOG_BUFFER_SIZE];
    va_list argptr;
    va_start(argptr, format);
    int cnt = vsnprintf(buf, LOG_BUFFER_SIZE, format, argptr);
    va_end(argptr);  
      
    /* */
    logUsartTx((uint8_t*)buf, strlen(buf));
    return cnt;
  }
  #else
  {
    return 0;
  }
  #endif /* #if USE_LOGGER == LOGGER_ON */
}

/* */

char* hex2Str(unsigned char * data, size_t dataLen)
{
  #if (USE_LOGGER == LOGGER_ON)
  {
    unsigned char * pin = data;
    const char * hex = "0123456789ABCDEF";
    char * pout = hexStr[hexStrIdx];
    uint8_t i = 0;
    uint8_t idx = hexStrIdx;
    size_t len;  
      
    if(dataLen == 0)
    {
      pout[0] = 0;     
    } 
    else     
    {
      /* Trim data that doesn't fit in buffer */
      len = MIN( dataLen , (MAX_HEX_STR_LENGTH / 2) );
        
      for(; i < (len - 1); ++i)
      {
          *pout++ = hex[(*pin>>4)&0xF];
          *pout++ = hex[(*pin++)&0xF];
      }
      *pout++ = hex[(*pin>>4)&0xF];
      *pout++ = hex[(*pin)&0xF];
      *pout = 0;
    }    
    
    hexStrIdx++;
    hexStrIdx %= MAX_HEX_STR;
    
    return hexStr[idx];
  }
  #else
  {
    return NULL;
  }
  #endif /* #if USE_LOGGER == LOGGER_ON */
}
