board.c

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/*
 * Copyright 2018 NXP
 * All rights reserved.
 *
 * 
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include "fsl_common.h"
#include "fsl_debug_console.h"
#include "board.h"

/*******************************************************************************
 * Variables
 ******************************************************************************/

/*******************************************************************************
 * Code
 ******************************************************************************/
 
/* Get debug console frequency. */
uint32_t BOARD_DebugConsoleSrcFreq(void)
{
    uint32_t freq;

    /* To make it simple, we assume default PLL and divider settings, and the only variable
       from application is use PLL3 source or OSC source */
    if (CLOCK_GetMux(kCLOCK_UartMux) == 0) /* PLL3 div6 80M */
    {
        freq = (CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6U) / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
    }
    else
    {
        freq = CLOCK_GetOscFreq() / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
    }

    return freq;
} 
 
/* Initialize debug console. */
void BOARD_InitDebugConsole(void)
{
    uint32_t uartClkSrcFreq = BOARD_DebugConsoleSrcFreq();

    DbgConsole_Init(BOARD_DEBUG_UART_BASEADDR, BOARD_DEBUG_UART_BAUDRATE, BOARD_DEBUG_UART_TYPE, uartClkSrcFreq);
}