2022年4月 – ページ 13

ADCは簡単だと思っていたがかなり苦戦してしまった。SDKに問題があるらしく機能の組み合わせ方で誤動作してしまうのだ。

最初に試したのは、ADC with DMA というDMA転送機能であるがマルチソース機能が便利かなと思って試して見たら見事にドツボにハマる。とにかく不安定というかソースを複数組み合わると変換結果がおかしくなる。暫く悪戦苦闘してみたがラチがあかないのでこの機能は問題外として綺麗さっぱり忘れることに。DMA転送を使ったシンプルな連続サンプリングも便利かなとは思ったけど肝心のADCが遅いしなと考えたら必要ないかもと思ってしまった。

さらに平均化処理のためのマルチサンプリング機能や連続変換モードも変換結果がおかしかったり永久に変換完了にならなかったりする。マルチソースやマルチサンプリング、連続変換機能はソフトウェア実装していてそのロジックがバグバグしてるんだろうと思う。

ということで普通にシンプルなシングルショット変換しか使えないということがわかったがマルチソースやマルチサンプリング機能はないよりもあったほうが良いと思うので独自実装してみた。特にマルチソースに関してはソース毎に全ての変換パラメタを変更できるようにしたので凄く便利に使えるはず。一つだけ気になるのは内部温度センサーだ。安定はしているがデータシートがウソっぽく見えるほどの誤差というか個体差によるバラツキが激しいようなので内部温度センサーは使えないと思った方がいいだろう。

ちなみに、変換完了にならなかった経験から変換完了を判断するためのbAHI_AdcPoll()は怪しすぎて使う気になれなかったのでデータシートから変換に必要なクロック数を計算しその時間経過したら変換完了としている。変換完了の判定処理まで自作することになるなんて初めての経験だ。(-_-;)

変換時間は最速で9.5usなので割り込みを使って連続変換すると他のコードが動かなくなる可能性があることから割り込みは使っていない。

あと、マルチソース機能はバックグラウンド処理(yield)を利用して連続変換していることに注意しよう。

【マルチソースのサンプル】

#include "device.h"

AdcConfig adc[6];

void setup(void)
{
  Debug::begin();

  adc[0].source(AdcConfig::SRC_ADC_1);
  adc[1].source(AdcConfig::SRC_ADC_2);
  adc[2].source(AdcConfig::SRC_ADC_3);
  adc[3].source(AdcConfig::SRC_ADC_4);
  adc[4].source(AdcConfig::SRC_ADC_TEMP);
  adc[5].source(AdcConfig::SRC_ADC_VOLT);
  MAdc::begin(adc, sizeof(adc) / sizeof(adc[0]));
}

void loop(void)
{
  static uint32 t = 0;

  if (micros() - t >= 1000000)
  {
    t += 1000000;
    uint16 adc1 = MAdc::voltage(AdcConfig::SRC_ADC_1);
    uint16 adc2 = MAdc::voltage(AdcConfig::SRC_ADC_2);
    uint16 adc3 = MAdc::voltage(AdcConfig::SRC_ADC_3);
    uint16 adc4 = MAdc::voltage(AdcConfig::SRC_ADC_4);
    int16  temp = MAdc::temperature();
    uint16 volt = MAdc::voltage(AdcConfig::SRC_ADC_VOLT);
    Debug::printf("ADC(%u, %u, %u, %u), TEMP(%d), VOLT(%u)\n", adc1, adc2, adc3, adc4, temp, volt);
  }
}

#include "device.h"

AdcConfig adc[6];

void setup(void)

{

Debug::begin();

adc[0].source(AdcConfig::SRC_ADC_1);

adc[1].source(AdcConfig::SRC_ADC_2);

adc[2].source(AdcConfig::SRC_ADC_3);

adc[3].source(AdcConfig::SRC_ADC_4);

adc[4].source(AdcConfig::SRC_ADC_TEMP);

adc[5].source(AdcConfig::SRC_ADC_VOLT);

MAdc::begin(adc, sizeof(adc) / sizeof(adc[0]));

}

void loop(void)

{

static uint32 t = 0;

if (micros() - t >= 1000000)

{

t += 1000000;

uint16 adc1 = MAdc::voltage(AdcConfig::SRC_ADC_1);

uint16 adc2 = MAdc::voltage(AdcConfig::SRC_ADC_2);

uint16 adc3 = MAdc::voltage(AdcConfig::SRC_ADC_3);

uint16 adc4 = MAdc::voltage(AdcConfig::SRC_ADC_4);

int16 temp = MAdc::temperature();

uint16 volt = MAdc::voltage(AdcConfig::SRC_ADC_VOLT);

Debug::printf("ADC(%u, %u, %u, %u), TEMP(%d), VOLT(%u)\n", adc1, adc2, adc3, adc4, temp, volt);

}

【ライブラリ】

/*
  adc.h - ADC Library for NXP-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>
#include "ticktimer.h"
#include "analog.h"
#include "gpio.h"

#define ADC_BIT_RESOLUTION 10 // bits
#define ADC_MAX_VALUE      ((1 << ADC_BIT_RESOLUTION) - 1)

#ifndef ADC_TEMP_CORRECTION_VALUE
#define ADC_TEMP_CORRECTION_VALUE 14
#endif

/*
   I/O Ports

     ADC1: ADC1
     ADC2: ADC2_VREF
     ADC3: DIO0
     ADC4: DIO1

   The following SDK API seems to have a bug.

     vAHI_AdcStartAccumulateSamples()
     bAHI_AdcPoll()
     bAHI_AdcEnableSampleBuffer()
*/

class AdcConfig
{
  public:

    typedef enum
    {
      SRC_ADC_1    = E_AHI_ADC_SRC_ADC_1, // ADC1 input
      SRC_ADC_2    = E_AHI_ADC_SRC_ADC_2, // ADC2 input
      SRC_ADC_3    = E_AHI_ADC_SRC_ADC_3, // ADC3 input
      SRC_ADC_4    = E_AHI_ADC_SRC_ADC_4, // ADC4 input
#ifdef E_AHI_ADC_SRC_ADC_5
      SRC_ADC_5    = E_AHI_ADC_SRC_ADC_5, // ADC5 input on JN5169
#endif
#ifdef E_AHI_ADC_SRC_ADC_6
      SRC_ADC_6    = E_AHI_ADC_SRC_ADC_6, // ADC6 input on JN5169
#endif
      SRC_ADC_TEMP = E_AHI_ADC_SRC_TEMP,  // on-chip temperature sensor
      SRC_ADC_VOLT = E_AHI_ADC_SRC_VOLT,  // internal voltage monitor
    } SRC;

    typedef enum
    {
      RANGE_1 = E_AHI_AP_INPUT_RANGE_1, // 0 to Vref
      RANGE_2 = E_AHI_AP_INPUT_RANGE_2, // 0 to 2Vref
    } RANGE;

    typedef enum
    {
      SAMPLES_2  = E_AHI_ADC_ACC_SAMPLE_2,  //  2 samples
      SAMPLES_4  = E_AHI_ADC_ACC_SAMPLE_4,  //  4 samples
      SAMPLES_8  = E_AHI_ADC_ACC_SAMPLE_8,  //  8 samples
      SAMPLES_16 = E_AHI_ADC_ACC_SAMPLE_16, // 16 samples
      SAMPLES_1,
    } SAMPLES;

    /* must be first call */
    AdcConfig& source(SRC source)
    {
      _source  = source;
      _range   = RANGE_1;
      _samples = SAMPLES_1;
      _adcref  = ANALOG_BANDGAP;
      _clock   = Analog::CLOCK_500KHZ;
      _capture = Analog::CAPTURE_2;
      return *this;
    }

    AdcConfig& range(RANGE value)
    {
      _range = value;
      return *this;
    }

    AdcConfig& samples(SAMPLES value)
    {
      _samples = value;
      return *this;
    }

    AdcConfig& reference(uint16 value)
    {
      _adcref = value;
      return *this;
    }

    AdcConfig& clock(Analog::CLOCK value)
    {
      _clock = value;
      return *this;
    }

    AdcConfig& capture(Analog::CAPTURE value)
    {
      _capture = value;
      return *this;
    }

  private:

    void configure(void)
    {
      Analog::clock(_clock);
      Analog::capture(_capture);
      Analog::reference(_adcref != ANALOG_BANDGAP);
      Analog::interrupt(false);
      Analog::configure();
    }

    uint16 periods(void)
    {
      // return 16MHz clock periods.
      return (((_capture + 1) << 1) * 3 + 13) << (_clock + 3);
    }

    friend class Adc;
    friend class MAdc;

    SRC             _source;
    RANGE           _range;
    SAMPLES         _samples;
    uint16          _adcref;
    Analog::CLOCK   _clock;
    Analog::CAPTURE _capture;
};

class Adc
{
  public:

    typedef enum
    {
      MODE_SINGLE_SHOT = E_AHI_ADC_SINGLE_SHOT, // single-shot mode
      MODE_CONTINUOUS  = E_AHI_ADC_CONTINUOUS,  // continous mode
    } MODE;

    static
    void begin(MODE mode, AdcConfig& conf)
    {
      AdcConfig::RANGE range = conf._range;
      _adcref = conf._adcref;
      if (conf._adcref == ANALOG_BANDGAP)
      {
        if (conf._source == AdcConfig::SRC_ADC_TEMP)
          range = AdcConfig::RANGE_1;
        else if (conf._source == AdcConfig::SRC_ADC_VOLT)
        {
          range = AdcConfig::RANGE_2;
          _adcref = ANALOG_BANDGAP * 2 * 1000 / 666;
        }
      }
      else if (conf._range)
        _adcref <<= 1;
      switch ((uint8)conf._source)
      {
        case AdcConfig::SRC_ADC_3: Gpio::pinMode(Gpio::DIO0, Gpio::INPUT); break;
        case AdcConfig::SRC_ADC_4: Gpio::pinMode(Gpio::DIO1, Gpio::INPUT); break;
      }
      _samples = conf._samples;
      _periods = conf.periods();
      _mode    = mode;
      _status  = 0;
      _adcsum  = 0;
      _count   = 0;
      _result  = 0;
      conf.configure();
      vAHI_AdcEnable(E_AHI_ADC_SINGLE_SHOT, range, conf._source);
    }

    static
    void end(void)
    {
      if (_status)
      {
        _status = 0;
        vAHI_AdcDisable();
      }
    }

    static
    void start(void)
    {
      if (!(_status & ~COMVERSION_END))
      {
        _status = 1 << _mode;
        _adcsum = 0;
        _count  = 0;
        vAHI_AdcStartSample();
        _start  = TickTimer::read();
      }
    }

    static
    bool conversion(void)
    {
      if (_status & COMVERSION_END)
        return true;
      if (!_status || (TickTimer::read() - _start < _periods))
        return false;
      uint16 value = u16AHI_AdcRead();
      if (_samples >= AdcConfig::SAMPLES_1)
        _result = value;
      else
      {
        _adcsum += value;
        if (++_count < (1 << (_samples + 1)))
        {
          vAHI_AdcStartSample();
          _start = TickTimer::read();
          return false;
        }
        _result = (_adcsum + (1 << _samples)) >> (_samples + 1);
        _adcsum = 0;
        _count  = 0;
      }
      if (_mode == MODE_CONTINUOUS)
      {
        vAHI_AdcStartSample();
        _start  = TickTimer::read();
        _status = COMVERSION_END | (1 << MODE_CONTINUOUS);
      }
      else
        _status = COMVERSION_END;
      return true;
    }

    static
    uint16 read(void)
    {
      _status &= ~COMVERSION_END;
      return _result;
    }

    static
    uint16 voltage(void)
    {
      return read() * _adcref / ADC_MAX_VALUE;
    }

    static
    int16 temperature(void)
    {
      return temperature(voltage());
    }

    static
    int16 temperature(int16 volt)
    {
      if (volt <= 610)
        return -40;
      if (volt >= 840)
        return 125;
      volt -= 730;
      return ADC_TEMP_CORRECTION_VALUE + 25 + (volt < 0 ? volt * 65 / 120 : volt * 100 / 110);
    }

    static
    uint16 reference(void)
    {
      return _adcref;
    }

  private:

    static const uint8 COMVERSION_END = 0x80;

    static AdcConfig::SAMPLES _samples;
    static MODE   _mode;
    static uint32 _start;
    static uint16 _periods;
    static uint16 _adcref;
    static uint16 _adcsum;
    static uint16 _result;
    static uint8  _count;
    static uint8  _status;
};

class MAdc
{
  public:

    static
    void begin(const AdcConfig *conf, uint8 size)
    {
      _index = 0;
      _count = 0;
      while (size-- && (_count < ADC_SRC_MAX))
        _config[_count++] = *conf++;
      if (_count)
        next(false);
    }

    static
    void end(void)
    {
      _count = 0;
      Adc::end();
    }

    static
    uint16 read(AdcConfig::SRC source)
    {
      return _result[source];
    }

    static
    uint16 voltage(AdcConfig::SRC source)
    {
      return read(source) * _adcref[source] / ADC_MAX_VALUE;
    }

    static
    int16 temperature(void)
    {
      return Adc::temperature(voltage(AdcConfig::SRC_ADC_TEMP));
    }

    static
    void handle(void)
    {
      if (_count)
      {
        if (Adc::conversion())
          next(true);
      }
    }

  private:

    static
    void next(bool conversion)
    {
      if (conversion)
      {
        AdcConfig::SRC source = _config[_index]._source;
        _result[source] = Adc::read();
        _adcref[source] = Adc::reference();
        if (++_index >= _count)
          _index = 0;
      }
      Adc::begin(Adc::MODE_SINGLE_SHOT, _config[_index]);
      Adc::start();
    }

    static const uint8 ADC_SRC_MAX = AdcConfig::SRC_ADC_VOLT + 1;

    static uint8     _index;
    static uint8     _count;
    static AdcConfig _config[ADC_SRC_MAX];
    static uint16    _result[ADC_SRC_MAX];
    static uint16    _adcref[ADC_SRC_MAX];
};

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

adc.h - ADC Library for NXP-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>

#include "ticktimer.h"

#include "analog.h"

#include "gpio.h"

#define ADC_BIT_RESOLUTION 10 // bits

#define ADC_MAX_VALUE ((1 << ADC_BIT_RESOLUTION) - 1)

#ifndef ADC_TEMP_CORRECTION_VALUE

#define ADC_TEMP_CORRECTION_VALUE 14

#endif

I/O Ports

ADC1: ADC1

ADC2: ADC2_VREF

ADC3: DIO0

ADC4: DIO1

The following SDK API seems to have a bug.

vAHI_AdcStartAccumulateSamples()

bAHI_AdcPoll()

bAHI_AdcEnableSampleBuffer()

class AdcConfig

{

public:

typedef enum

{

SRC_ADC_1 = E_AHI_ADC_SRC_ADC_1, // ADC1 input

SRC_ADC_2 = E_AHI_ADC_SRC_ADC_2, // ADC2 input

SRC_ADC_3 = E_AHI_ADC_SRC_ADC_3, // ADC3 input

SRC_ADC_4 = E_AHI_ADC_SRC_ADC_4, // ADC4 input

#ifdef E_AHI_ADC_SRC_ADC_5

SRC_ADC_5 = E_AHI_ADC_SRC_ADC_5, // ADC5 input on JN5169

#endif

#ifdef E_AHI_ADC_SRC_ADC_6

SRC_ADC_6 = E_AHI_ADC_SRC_ADC_6, // ADC6 input on JN5169

#endif

SRC_ADC_TEMP = E_AHI_ADC_SRC_TEMP, // on-chip temperature sensor

SRC_ADC_VOLT = E_AHI_ADC_SRC_VOLT, // internal voltage monitor

} SRC;

typedef enum

{

RANGE_1 = E_AHI_AP_INPUT_RANGE_1, // 0 to Vref

RANGE_2 = E_AHI_AP_INPUT_RANGE_2, // 0 to 2Vref

} RANGE;

typedef enum

{

SAMPLES_2 = E_AHI_ADC_ACC_SAMPLE_2, // 2 samples

SAMPLES_4 = E_AHI_ADC_ACC_SAMPLE_4, // 4 samples

SAMPLES_8 = E_AHI_ADC_ACC_SAMPLE_8, // 8 samples

SAMPLES_16 = E_AHI_ADC_ACC_SAMPLE_16, // 16 samples

SAMPLES_1,

} SAMPLES;

/* must be first call */

AdcConfig& source(SRC source)

{

_source = source;

_range = RANGE_1;

_samples = SAMPLES_1;

_adcref = ANALOG_BANDGAP;

_clock = Analog::CLOCK_500KHZ;

_capture = Analog::CAPTURE_2;

return *this;

}

AdcConfig& range(RANGE value)

{

_range = value;

return *this;

}

AdcConfig& samples(SAMPLES value)

{

_samples = value;

return *this;

}

AdcConfig& reference(uint16 value)

{

_adcref = value;

return *this;

}

AdcConfig& clock(Analog::CLOCK value)

{

_clock = value;

return *this;

}

AdcConfig& capture(Analog::CAPTURE value)

{

_capture = value;

return *this;

}

private:

void configure(void)

{

Analog::clock(_clock);

Analog::capture(_capture);

Analog::reference(_adcref != ANALOG_BANDGAP);

Analog::interrupt(false);

Analog::configure();

}

uint16 periods(void)

{

// return 16MHz clock periods.

return (((_capture + 1) << 1) * 3 + 13) << (_clock + 3);

}

friend class Adc;

friend class MAdc;

SRC _source;

RANGE _range;

SAMPLES _samples;

uint16 _adcref;

Analog::CLOCK _clock;

Analog::CAPTURE _capture;

};

class Adc

{

public:

typedef enum

{

MODE_SINGLE_SHOT = E_AHI_ADC_SINGLE_SHOT, // single-shot mode

MODE_CONTINUOUS = E_AHI_ADC_CONTINUOUS, // continous mode

} MODE;

static

void begin(MODE mode, AdcConfig& conf)

{

AdcConfig::RANGE range = conf._range;

_adcref = conf._adcref;

if (conf._adcref == ANALOG_BANDGAP)

{

if (conf._source == AdcConfig::SRC_ADC_TEMP)

range = AdcConfig::RANGE_1;

else if (conf._source == AdcConfig::SRC_ADC_VOLT)

{

range = AdcConfig::RANGE_2;

_adcref = ANALOG_BANDGAP * 2 * 1000 / 666;

}

else if (conf._range)

_adcref <<= 1;

switch ((uint8)conf._source)

{

case AdcConfig::SRC_ADC_3: Gpio::pinMode(Gpio::DIO0, Gpio::INPUT); break;

case AdcConfig::SRC_ADC_4: Gpio::pinMode(Gpio::DIO1, Gpio::INPUT); break;

}

_samples = conf._samples;

_periods = conf.periods();

_mode = mode;

_status = 0;

_adcsum = 0;

_count = 0;

_result = 0;

conf.configure();

vAHI_AdcEnable(E_AHI_ADC_SINGLE_SHOT, range, conf._source);

}

static

void end(void)

{

if (_status)

{

_status = 0;

vAHI_AdcDisable();

}

static

void start(void)

{

if (!(_status & ~COMVERSION_END))

{

_status = 1 << _mode;

_adcsum = 0;

_count = 0;

vAHI_AdcStartSample();

_start = TickTimer::read();

}

static

bool conversion(void)

{

if (_status & COMVERSION_END)

return true;

if (!_status || (TickTimer::read() - _start < _periods))

return false;

uint16 value = u16AHI_AdcRead();

if (_samples >= AdcConfig::SAMPLES_1)

_result = value;

else

{

_adcsum += value;

if (++_count < (1 << (_samples + 1)))

{

vAHI_AdcStartSample();

_start = TickTimer::read();

return false;

}

_result = (_adcsum + (1 << _samples)) >> (_samples + 1);

_adcsum = 0;

_count = 0;

}

if (_mode == MODE_CONTINUOUS)

{

vAHI_AdcStartSample();

_start = TickTimer::read();

_status = COMVERSION_END | (1 << MODE_CONTINUOUS);

}

else

_status = COMVERSION_END;

return true;

}

static

uint16 read(void)

{

_status &= ~COMVERSION_END;

return _result;

}

static

uint16 voltage(void)

{

return read() * _adcref / ADC_MAX_VALUE;

}

static

int16 temperature(void)

{

return temperature(voltage());

}

static

int16 temperature(int16 volt)

{

if (volt <= 610)

return -40;

if (volt >= 840)

return 125;

volt -= 730;

return ADC_TEMP_CORRECTION_VALUE + 25 + (volt < 0 ? volt * 65 / 120 : volt * 100 / 110);

}

static

uint16 reference(void)

{

return _adcref;

}

private:

static const uint8 COMVERSION_END = 0x80;

static AdcConfig::SAMPLES _samples;

static MODE _mode;

static uint32 _start;

static uint16 _periods;

static uint16 _adcref;

static uint16 _adcsum;

static uint16 _result;

static uint8 _count;

static uint8 _status;

};

class MAdc

{

public:

static

void begin(const AdcConfig *conf, uint8 size)

{

_index = 0;

_count = 0;

while (size-- && (_count < ADC_SRC_MAX))

_config[_count++] = *conf++;

if (_count)

next(false);

}

static

void end(void)

{

_count = 0;

Adc::end();

}

static

uint16 read(AdcConfig::SRC source)

{

return _result[source];

}

static

uint16 voltage(AdcConfig::SRC source)

{

return read(source) * _adcref[source] / ADC_MAX_VALUE;

}

static

int16 temperature(void)

{

return Adc::temperature(voltage(AdcConfig::SRC_ADC_TEMP));

}

static

void handle(void)

{

if (_count)

{

if (Adc::conversion())

next(true);

}

private:

static

void next(bool conversion)

{

if (conversion)

{

AdcConfig::SRC source = _config[_index]._source;

_result[source] = Adc::read();

_adcref[source] = Adc::reference();

if (++_index >= _count)

_index = 0;

}

Adc::begin(Adc::MODE_SINGLE_SHOT, _config[_index]);

Adc::start();

}

static const uint8 ADC_SRC_MAX = AdcConfig::SRC_ADC_VOLT + 1;

static uint8 _index;

static uint8 _count;

static AdcConfig _config[ADC_SRC_MAX];

static uint16 _result[ADC_SRC_MAX];

static uint16 _adcref[ADC_SRC_MAX];

};

/*
  adc.cpp - ADC Library for NXP-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
*/
#include "adc.h"

AdcConfig::SAMPLES Adc::_samples;
Adc::MODE Adc::_mode;
uint32    Adc::_start;
uint16    Adc::_periods;
uint16    Adc::_adcref;
uint16    Adc::_adcsum;
uint16    Adc::_result;
uint8     Adc::_count;
uint8     Adc::_status;

uint8     MAdc::_count;
uint8     MAdc::_index;
AdcConfig MAdc::_config[];
uint16    MAdc::_result[];
uint16    MAdc::_adcref[];

adc.cpp - ADC Library for NXP-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

#include "adc.h"

AdcConfig::SAMPLES Adc::_samples;

Adc::MODE Adc::_mode;

uint32 Adc::_start;

uint16 Adc::_periods;

uint16 Adc::_adcref;

uint16 Adc::_adcsum;

uint16 Adc::_result;

uint8 Adc::_count;

uint8 Adc::_status;

uint8 MAdc::_count;

uint8 MAdc::_index;

AdcConfig MAdc::_config[];

uint16 MAdc::_result[];

uint16 MAdc::_adcref[];

/*
  analog.h - Analog Configure Library for NXP-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 VREF: ADC2-VREF
*/

#define ANALOG_BANDGAP  1235 // mV

class Analog
{
  public:

    typedef enum
    {
      CAPTURE_2 = E_AHI_AP_SAMPLE_2, // 2 clock periods
      CAPTURE_4 = E_AHI_AP_SAMPLE_4, // 4 clock periods
      CAPTURE_6 = E_AHI_AP_SAMPLE_6, // 6 clock periods
      CAPTURE_8 = E_AHI_AP_SAMPLE_8, // 8 clock periods
    } CAPTURE;

    typedef enum
    {
      CLOCK_2MHZ   = E_AHI_AP_CLOCKDIV_2MHZ,   // divisor of 8
      CLOCK_1MHZ   = E_AHI_AP_CLOCKDIV_1MHZ,   // divisor of 16
      CLOCK_500KHZ = E_AHI_AP_CLOCKDIV_500KHZ, // divisor of 32 (500kHz is recommended for ADC)
      CLOCK_250KHZ = E_AHI_AP_CLOCKDIV_250KHZ, // divisor of 64
    } CLOCK;

    static
    void begin(void)
    {
      _interrupt = false;
      _clock     = CLOCK_500KHZ;
      _capture   = CAPTURE_2;
      _reference = false;
    }

    static
    void configure(void)
    {
      vAHI_ApConfigure(true, _interrupt, _capture, _clock, _reference);
      while (!bAHI_APRegulatorEnabled())
        continue;
    }

    static
    void stop(void)
    {
      vAHI_ApConfigure(false, 0, 0, 0, 0);
    }

    static
    void decoupling(bool enable)
    {
      // Decoupling VREF Pin.
      vAHI_ProtocolPower(true);
      vAHI_ApSetBandGap(enable);
    }

    static
    void interrupt(bool enable)
    {
      _interrupt = enable;
    }

    static
    void clock(CLOCK clock)
    {
      _clock = clock;
    }

    static
    void capture(CAPTURE capture)
    {
      _capture = capture;
    }

    static
    void reference(bool external)
    {
      _reference = external;
    }

  private:

    static bool    _interrupt;
    static CLOCK   _clock;
    static CAPTURE _capture;
    static bool    _reference;
};

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

analog.h - Analog Configure Library for NXP-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 VREF: ADC2-VREF

#define ANALOG_BANDGAP 1235 // mV

class Analog

{

public:

typedef enum

{

CAPTURE_2 = E_AHI_AP_SAMPLE_2, // 2 clock periods

CAPTURE_4 = E_AHI_AP_SAMPLE_4, // 4 clock periods

CAPTURE_6 = E_AHI_AP_SAMPLE_6, // 6 clock periods

CAPTURE_8 = E_AHI_AP_SAMPLE_8, // 8 clock periods

} CAPTURE;

typedef enum

{

CLOCK_2MHZ = E_AHI_AP_CLOCKDIV_2MHZ, // divisor of 8

CLOCK_1MHZ = E_AHI_AP_CLOCKDIV_1MHZ, // divisor of 16

CLOCK_500KHZ = E_AHI_AP_CLOCKDIV_500KHZ, // divisor of 32 (500kHz is recommended for ADC)

CLOCK_250KHZ = E_AHI_AP_CLOCKDIV_250KHZ, // divisor of 64

} CLOCK;

static

void begin(void)

{

_interrupt = false;

_clock = CLOCK_500KHZ;

_capture = CAPTURE_2;

_reference = false;

}

static

void configure(void)

{

vAHI_ApConfigure(true, _interrupt, _capture, _clock, _reference);

while (!bAHI_APRegulatorEnabled())

continue;

}

static

void stop(void)

{

vAHI_ApConfigure(false, 0, 0, 0, 0);

}

static

void decoupling(bool enable)

{

// Decoupling VREF Pin.

vAHI_ProtocolPower(true);

vAHI_ApSetBandGap(enable);

}

static

void interrupt(bool enable)

{

_interrupt = enable;

}

static

void clock(CLOCK clock)

{

_clock = clock;

}

static

void capture(CAPTURE capture)

{

_capture = capture;

}

static

void reference(bool external)

{

_reference = external;

}

private:

static bool _interrupt;

static CLOCK _clock;

static CAPTURE _capture;

static bool _reference;

};

/*
  analog.cpp - Analog Configure Library for NXP-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
*/
#include "analog.h"

bool            Analog::_interrupt;
Analog::CLOCK   Analog::_clock;
Analog::CAPTURE Analog::_capture;
bool            Analog::_reference;

analog.cpp - Analog Configure Library for NXP-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

#include "analog.h"

bool Analog::_interrupt;

Analog::CLOCK Analog::_clock;

Analog::CAPTURE Analog::_capture;

bool Analog::_reference;

次回は、Comparatorの予定。

月: 2022年4月

NXP JN516X (TWELITE) をプログラミングする（ADC)