Exemple #1
0
/**
 * @brief   Configures and activates the DAC peripheral.
 *
 * @param[in] dacp      pointer to the @p DACDriver object
 *
 * @notapi
 */
void dac_lld_start(DACDriver *dacp) {

  /* If the driver is in DAC_STOP state then a full initialization is
     required.*/
  if (dacp->state == DAC_STOP) {
    /* Enabling the clock source.*/
#if STM32_DAC_USE_DAC1_CH1
    if (&DACD1 == dacp) {
      rccEnableDAC1(false);
    }
#endif

#if STM32_DAC_USE_DAC1_CH2
    if (&DACD2 == dacp) {
      rccEnableDAC1(false);
    }
#endif

#if STM32_DAC_USE_DAC2_CH1
    if (&DACD3 == dacp) {
      rccEnableDAC2(false);
    }
#endif

#if STM32_DAC_USE_DAC2_CH2
    if (&DACD3 == dacp) {
      rccEnableDAC2(false);
    }
#endif

    /* Enabling DAC in SW triggering mode initially, initializing data to
       zero.*/
#if STM32_DAC_DUAL_MODE == FALSE
    dacp->params->dac->CR &= dacp->params->regmask;
    dacp->params->dac->CR |= DAC_CR_EN1 << dacp->params->regshift;
    dac_lld_put_channel(dacp, 0U, dacp->config->init);
#else
    if ((dacp->config->datamode == DAC_DHRM_12BIT_RIGHT_DUAL) ||
        (dacp->config->datamode == DAC_DHRM_12BIT_LEFT_DUAL) ||
        (dacp->config->datamode == DAC_DHRM_8BIT_RIGHT_DUAL)) {
      dacp->params->dac->CR = DAC_CR_EN2 | DAC_CR_EN1;
      dac_lld_put_channel(dacp, 1U, dacp->config->init);
    }
    else {
      dacp->params->dac->CR = DAC_CR_EN1;
    }
    dac_lld_put_channel(dacp, 0U, dacp->config->init);
#endif
  }
}
Exemple #2
0
/**
 * @brief   Outputs a value directly on a DAC channel.
 *
 * @param[in] dacp      pointer to the @p DACDriver object
 * @param[in] channel   DAC channel number
 * @param[in] sample    value to be output
 *
 * @xclass
 */
void dacPutChannelX(DACDriver *dacp, dacchannel_t channel, dacsample_t sample) {

  osalDbgCheck(channel < DAC_MAX_CHANNELS);
  osalDbgAssert(dacp->state == DAC_READY, "invalid state");

  dac_lld_put_channel(dacp, channel, sample);
}