2022年4月 – ページ 11

システムクロックや32KHzクロックを変更したり現在のクロック情報を取得できる。起動時はXTALクロック(16MHz)で1-32MHzの間でＣＰＵクロックを変更することができペリフェラルクロックは16MHz固定である。高速RCクロック(27MHz)では0.84-27MHzの範囲でＣＰＵクロックを変更することができペリフェラルクロックは13.5MHz固定となる。

【ライブラリ】

/*
  clock.h - Clock Library for XNP-JN516x

  Copyright (c) 2022 Sasapea's Lab. All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General
  Public License along with this library; if not, write to the
  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  Boston, MA  02111-1307  USA
*/
#pragma once

#include <jendefs.h>
#include <AppHardwareApi.h>

/*
   I/O Ports

    External RC  : DIO9
    External XTAL: DIO9 and DIO10
*/

class Clock
{
  public:

    typedef enum
    {
      EXT32KSRC_RC   = E_AHI_EXTERNAL_RC, // external RC
      EXT32KSRC_XTAL = E_AHI_XTAL,        // external crystal
    } EXT32KSRC;

    static
    bool external32K(EXT32KSRC clksrc)
    {
      return bAHI_Set32KhzClockMode(clksrc);
    }

    static
    void external32KXtal(void)
    {
      vAHI_Init32KhzXtal();
    }

    typedef enum
    {
      EXT32KRC_530nA = 2, // +-300ppm (default)
      EXT32KRC_350nA = 3, // +-600ppm
    } EXT32KRC;

    static
    void external32KRC(EXT32KRC trim)
    {
      vAHI_Trim32KhzRC(trim);
    }

    typedef enum
    {
      CLKSRC_XTAL = E_AHI_XTAL_ON,
      CLKSRC_RC   = E_AHI_XTAL_OFF,
    } CLKSRC;

    static
    void source(CLKSRC clksrc, bool powerdown = false)
    {
      return vAHI_SelectClockSource(clksrc, powerdown);
    }

    static
    CLKSRC source(void)
    {
      return (CLKSRC)bAHI_GetClkSource();
    }

    typedef enum
    {
      //                           32MHz (27MHz)
      CLKDIV8  = E_AHI_XTAL_4MHZ,  //  4 ( 3.38) MHz
      CLKDIV4  = E_AHI_XTAL_8MHZ,  //  8 ( 6.75) MHz
      CLKDIV2  = E_AHI_XTAL_16MHZ, // 16 (13.5 ) MHz
      CLKDIV1  = E_AHI_XTAL_32MHZ, // 32 (27   ) MHz
      CLKDIV32 = E_AHI_XTAL_1MHZ,  //  1 ( 0.84) MHz
      CLKDIV16 = E_AHI_XTAL_2MHZ,  //  2 ( 1.69) MHz
    } CLKDIV;

    static
    bool rate(CLKDIV clkdiv)
    {
      return bAHI_SetClockRate(clkdiv);
    }

    static
    CLKDIV rate(void)
    {
      return (CLKDIV)u8AHI_GetSystemClkRate();
    }

    static
    bool external32MXtal(void)
    {
      return bAHI_Clock32MHzStable();
    }

    typedef enum
    {
      XTALPULL_NONE = E_AHI_XTAL_PULL_NONE,  // No additional crystal load capacitance (default)
      XTALPULL_50   = E_AHI_XTAL_PULL_50PC,  // 1pF
      XTALPULL_100  = E_AHI_XTAL_PULL_100PC, // 2pF
    } XTALPULL;

    static
    void xtalPull(XTALPULL mode)
    {
      vAHI_ClockXtalPull(mode);
    }

    static
    void fastStartUp(bool automatic, bool powerdown)
    {
      vAHI_EnableFastStartUp(automatic, powerdown);
    }

    static
    bool internal32MRC(void)
    {
      return bAHI_TrimHighSpeedRCOsc();
    }

    static
    void optimizeWaitStates(void)
    {
      return vAHI_OptimiseWaitStates();
    }
};

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clock.h - Clock Library for XNP-JN516x

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General

Public License along with this library; if not, write to the

Free Software Foundation, Inc., 59 Temple Place, Suite 330,

Boston, MA 02111-1307 USA

#pragma once

#include <jendefs.h>

#include <AppHardwareApi.h>

I/O Ports

External RC : DIO9

External XTAL: DIO9 and DIO10

class Clock

{

public:

typedef enum

{

EXT32KSRC_RC = E_AHI_EXTERNAL_RC, // external RC

EXT32KSRC_XTAL = E_AHI_XTAL, // external crystal

} EXT32KSRC;

static

bool external32K(EXT32KSRC clksrc)

{

return bAHI_Set32KhzClockMode(clksrc);

}

static

void external32KXtal(void)

{

vAHI_Init32KhzXtal();

}

typedef enum

{

EXT32KRC_530nA = 2, // +-300ppm (default)

EXT32KRC_350nA = 3, // +-600ppm

} EXT32KRC;

static

void external32KRC(EXT32KRC trim)

{

vAHI_Trim32KhzRC(trim);

}

typedef enum

{

CLKSRC_XTAL = E_AHI_XTAL_ON,

CLKSRC_RC = E_AHI_XTAL_OFF,

} CLKSRC;

static

void source(CLKSRC clksrc, bool powerdown = false)

{

return vAHI_SelectClockSource(clksrc, powerdown);

}

static

CLKSRC source(void)

{

return (CLKSRC)bAHI_GetClkSource();

}

typedef enum

{

// 32MHz (27MHz)

CLKDIV8 = E_AHI_XTAL_4MHZ, // 4 ( 3.38) MHz

CLKDIV4 = E_AHI_XTAL_8MHZ, // 8 ( 6.75) MHz

CLKDIV2 = E_AHI_XTAL_16MHZ, // 16 (13.5 ) MHz

CLKDIV1 = E_AHI_XTAL_32MHZ, // 32 (27 ) MHz

CLKDIV32 = E_AHI_XTAL_1MHZ, // 1 ( 0.84) MHz

CLKDIV16 = E_AHI_XTAL_2MHZ, // 2 ( 1.69) MHz

} CLKDIV;

static

bool rate(CLKDIV clkdiv)

{

return bAHI_SetClockRate(clkdiv);

}

static

CLKDIV rate(void)

{

return (CLKDIV)u8AHI_GetSystemClkRate();

}

static

bool external32MXtal(void)

{

return bAHI_Clock32MHzStable();

}

typedef enum

{

XTALPULL_NONE = E_AHI_XTAL_PULL_NONE, // No additional crystal load capacitance (default)

XTALPULL_50 = E_AHI_XTAL_PULL_50PC, // 1pF

XTALPULL_100 = E_AHI_XTAL_PULL_100PC, // 2pF

} XTALPULL;

static

void xtalPull(XTALPULL mode)

{

vAHI_ClockXtalPull(mode);

}

static

void fastStartUp(bool automatic, bool powerdown)

{

vAHI_EnableFastStartUp(automatic, powerdown);

}

static

bool internal32MRC(void)

{

return bAHI_TrimHighSpeedRCOsc();

}

static

void optimizeWaitStates(void)

{

return vAHI_OptimiseWaitStates();

}

};

次回は、Brownoutの予定。

月: 2022年4月

NXP JN516X (TWELITE) をプログラミングする（CLOCK)