padcmap.h

/* -*- mode: c++; tab-width: 8 -*- */
/*
 * hasak (ham and swiss army knife) keyer for Teensy 4.X, 3.X
 * Copyright (c) 2021,2022 by Roger Critchlow, Charlestown, MA, USA
 * ad5dz, rec@elf.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice, development funding notice, and this permission
 * notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/*
** adcmap endpoints for pot mapping.
*/
#define KYR_PADC_VOLUME_MAX -320 /* -32dB */
#define KYR_PADC_VOLUME_MIN 0	/*  0dB */
#define KYR_PADC_TONE_MAX 250	/*  250Hz */
#define KYR_PADC_TONE_MIN 1250	/* 1250Hz */
#define KYR_PADC_SPEED_MAX 5	/* 5 wpm */
#define KYR_PADC_SPEED_MIN 55	/* 55 wpm */
#define KYR_PADC_FRAC_MAX 0	/* 0/128th */
#define KYR_PADC_FRAC_MIN 127	/* 127/128th */
#define KYR_PADC_BAL_MAX -8192
#define KYR_PADC_BAL_MIN 8191
#define KYR_PADC_TIME_MAX 0
#define KYR_PADC_TIME_MIN 16383
#define KYR_PADC_RATIO_MIN 25
#define KYR_PADC_RATIO_MAX 75

static elapsedMillis padcmap_burn_in;

static void padcmap_value(int nrpn, int _) {
  if (nrpn_get(NRPN_PADC_ENABLE)) {
    int min, max;
    int nrpn2 = nrpn_get(nrpn+1);
    switch (nrpn2) {
    case NRPN_NOTHING: return;
    case NRPN_VOLUME:
    case NRPN_LEVEL:
    case NRPN_USB_LEVEL:
    case NRPN_I2S_LEVEL:
    case NRPN_HDW_LEVEL:
    case NRPN_CODEC_VOLUME:
      min = KYR_PADC_VOLUME_MIN; max = KYR_PADC_VOLUME_MAX; break;
    case NRPN_TONE:
      min = KYR_PADC_TONE_MIN; max = KYR_PADC_TONE_MAX; break;
    case NRPN_SPEED:
    case NRPN_FARNS:
      min = KYR_PADC_SPEED_MIN; max = KYR_PADC_SPEED_MAX; break;
    case NRPN_SPEED_FRAC:
      min = KYR_PADC_FRAC_MIN; max = KYR_PADC_FRAC_MAX; break;
    case NRPN_ST_BALANCE:
    case NRPN_COMP:
      min = KYR_PADC_BAL_MIN; max = KYR_PADC_BAL_MAX; break;
    case NRPN_HEAD_TIME:
    case NRPN_TAIL_TIME:
    case NRPN_RISE_TIME:
    case NRPN_FALL_TIME:
    case NRPN_MIXER_SLEW_TIME:
    case NRPN_FREQ_SLEW_TIME:
      min = KYR_PADC_TIME_MIN; max = KYR_PADC_TIME_MAX; break;
    case NRPN_WEIGHT:
    case NRPN_RATIO:
      min = KYR_PADC_RATIO_MIN; max = KYR_PADC_RATIO_MAX; break;
    default: return;
    }
    int p = nrpn_get(nrpn);		/* fetch adc reading */
    int n = ((1024-p)*min + p*max)>>10;	/* compute new value for nrpn2 */
    if (n == nrpn_get(nrpn2)) return;	/* value is unchanged */
    // Serial.printf("adc %d map %d -> %d\n", p, n, nrpn2);
    nrpn_set(nrpn2, n);			/* set the new value */
  }
}

static void padcmap_setup(void) {
  for (int i = 0; i < KYR_N_PADC; i += 1)
    nrpn_listen(NRPN_PADC0_VAL+i*(NRPN_PADC1_VAL-NRPN_PADC0_VAL), padcmap_value);
}