C++ dmaStreamSetTransactionSize函数代码示例

uint8_t Infrared_t::TransmitWord(uint16_t wData, uint8_t PwrPercent) {
//    Uart.Printf("T\r");
    if(IsBusy) return BUSY;
    IsBusy = true;
    // Calculate power
    uint32_t Pwr = (MaxPower * PwrPercent) / 100;
    // Fill buffer with powers depending on data
    uint16_t *p = TxPwrBuf;
    // Header
    *p++ = Pwr;
    *p++ = Pwr;
    *p++ = Pwr;
    *p++ = Pwr;
    // Data
    for(uint8_t i=0; i<IR_BIT_CNT; i++) {
        *p++ = 0;                       // Off = Space
        *p++ = Pwr;                     // '0' is single ON
        if(wData & 0x8000) *p++ = Pwr;  // '1' is double ON
        wData <<= 1;
    }
    *p++ = 0;                           // Off - finishing delay

    // Enable DMA
    uint8_t CountToTx = p - TxPwrBuf;
    dmaStreamSetTransactionSize(IR_TX_DMA_STREAM, CountToTx);
    dmaStreamEnable(IR_TX_DMA_STREAM);
    // Start master timer
    Modulator.GenerateUpdateEvt();  // Generate update: clear counter and request DMA
    Modulator.Enable();
    return OK;
}

/**
 * @brief   Prepares to handle read transaction.
 * @details Designed for read special registers from card.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[out] buf      pointer to the read buffer
 * @param[in] bytes     number of bytes to read
 *
 * @return              The operation status.
 * @retval HAL_SUCCESS  operation succeeded.
 * @retval HAL_FAILED   operation failed.
 *
 * @notapi
 */
static bool sdc_lld_prepare_read_bytes(SDCDriver *sdcp,
                                       uint8_t *buf, uint32_t bytes) {
  osalDbgCheck(bytes < 0x1000000);

  sdcp->sdio->DTIMER = STM32_SDC_READ_TIMEOUT;

  /* Checks for errors and waits for the card to be ready for reading.*/
  if (_sdc_wait_for_transfer_state(sdcp))
    return HAL_FAILED;

  /* Prepares the DMA channel for writing.*/
  dmaStreamSetMemory0(sdcp->dma, buf);
  dmaStreamSetTransactionSize(sdcp->dma, bytes / sizeof (uint32_t));
  dmaStreamSetMode(sdcp->dma, sdcp->dmamode | STM32_DMA_CR_DIR_P2M);
  dmaStreamEnable(sdcp->dma);

  /* Setting up data transfer.*/
  sdcp->sdio->ICR   = STM32_SDIO_ICR_ALL_FLAGS;
  sdcp->sdio->MASK  = SDIO_MASK_DCRCFAILIE |
                      SDIO_MASK_DTIMEOUTIE |
                      SDIO_MASK_STBITERRIE |
                      SDIO_MASK_RXOVERRIE |
                      SDIO_MASK_DATAENDIE;
  sdcp->sdio->DLEN  = bytes;

  /* Transaction starts just after DTEN bit setting.*/
  sdcp->sdio->DCTRL = SDIO_DCTRL_DTDIR |
                      SDIO_DCTRL_DTMODE |   /* multibyte data transfer */
                      SDIO_DCTRL_DMAEN |
                      SDIO_DCTRL_DTEN;

  return HAL_SUCCESS;
}

/**
 * @brief   Starts an ADC conversion.
 *
 * @param[in] adcp      pointer to the @p ADCDriver object
 *
 * @notapi
 */
void adc_lld_start_conversion(ADCDriver *adcp) {
  uint32_t mode;
  const ADCConversionGroup *grpp = adcp->grpp;

  /* DMA setup.*/
  mode = adcp->dmamode;
  if (grpp->circular) {
    mode |= STM32_DMA_CR_CIRC;
  }
  if (adcp->depth > 1) {
    /* If the buffer depth is greater than one then the half transfer interrupt
       interrupt is enabled in order to allows streaming processing.*/
    mode |= STM32_DMA_CR_HTIE;
  }
  dmaStreamSetMemory0(adcp->dmastp, adcp->samples);
  dmaStreamSetTransactionSize(adcp->dmastp, (uint32_t)grpp->num_channels *
                                            (uint32_t)adcp->depth);
  dmaStreamSetMode(adcp->dmastp, mode);

  /* ADC setup.*/
  adcp->adc->SR    = 0;
  adcp->adc->SMPR1 = grpp->smpr1;
  adcp->adc->SMPR2 = grpp->smpr2;
  adcp->adc->SQR1  = grpp->sqr1;
  adcp->adc->SQR2  = grpp->sqr2;
  adcp->adc->SQR3  = grpp->sqr3;

  /* ADC configuration and start, the start is performed using the method
     specified in the CR2 configuration, usually ADC_CR2_SWSTART.*/
  adcp->adc->CR1   = grpp->cr1 | ADC_CR1_OVRIE | ADC_CR1_SCAN;
  adcp->adc->CR2   = grpp->cr2 | ADC_CR2_CONT  | ADC_CR2_DMA |
                                 ADC_CR2_DDS   | ADC_CR2_ADON;
}

/**
 * @brief   Starts an ADC conversion.
 *
 * @param[in] adcp      pointer to the @p ADCDriver object
 *
 * @notapi
 */
void adc_lld_start_conversion(ADCDriver *adcp) {
  uint32_t mode, n;
  const ADCConversionGroup *grpp = adcp->grpp;

  /* DMA setup.*/
  mode = adcp->dmamode;
  if (grpp->circular)
    mode |= STM32_DMA_CR_CIRC;
  if (adcp->depth > 1) {
    /* If the buffer depth is greater than one then the half transfer interrupt
       interrupt is enabled in order to allows streaming processing.*/
    mode |= STM32_DMA_CR_HTIE;
    n = (uint32_t)grpp->num_channels * (uint32_t)adcp->depth;
  }
  else
    n = (uint32_t)grpp->num_channels;
  dmaStreamSetMemory0(adcp->dmastp, adcp->samples);
  dmaStreamSetTransactionSize(adcp->dmastp, n);
  dmaStreamSetMode(adcp->dmastp, mode);
  dmaStreamEnable(adcp->dmastp);

  /* ADC setup.*/
  adcp->adc->CR1   = grpp->cr1 | ADC_CR1_SCAN;
  adcp->adc->CR2   = grpp->cr2 | ADC_CR2_DMA | ADC_CR2_CONT | ADC_CR2_ADON;
  adcp->adc->SMPR1 = grpp->smpr1;
  adcp->adc->SMPR2 = grpp->smpr2;
  adcp->adc->SQR1  = grpp->sqr1;
  adcp->adc->SQR2  = grpp->sqr2;
  adcp->adc->SQR3  = grpp->sqr3;

  /* ADC start by writing ADC_CR2_ADON a second time.*/
  adcp->adc->CR2   = grpp->cr2 | ADC_CR2_DMA | ADC_CR2_CONT | ADC_CR2_ADON;
}

/**
 * @brief   Starts an ADC conversion.
 *
 * @param[in] adcp      pointer to the @p ADCDriver object
 *
 * @notapi
 */
void adc_lld_start_conversion(ADCDriver *adcp) {
  uint32_t mode, cr2;
  const ADCConversionGroup *grpp = adcp->grpp;

  /* DMA setup.*/
  mode = adcp->dmamode;
  if (grpp->circular) {
    mode |= STM32_DMA_CR_CIRC;
    if (adcp->depth > 1) {
      /* If circular buffer depth > 1, then the half transfer interrupt
         is enabled in order to allow streaming processing.*/
      mode |= STM32_DMA_CR_HTIE;
    }
  }
  dmaStreamSetMemory0(adcp->dmastp, adcp->samples);
  dmaStreamSetTransactionSize(adcp->dmastp, (uint32_t)grpp->num_channels *
                                            (uint32_t)adcp->depth);
  dmaStreamSetMode(adcp->dmastp, mode);
  dmaStreamEnable(adcp->dmastp);

  /* ADC setup.*/
  adcp->adc->CR1   = grpp->cr1 | ADC_CR1_SCAN;
  cr2 = grpp->cr2 | ADC_CR2_DMA | ADC_CR2_ADON;
  if ((cr2 & (ADC_CR2_EXTTRIG | ADC_CR2_JEXTTRIG)) == 0)
    cr2 |= ADC_CR2_CONT;
  adcp->adc->CR2   = grpp->cr2 | cr2;
  adcp->adc->SMPR1 = grpp->smpr1;
  adcp->adc->SMPR2 = grpp->smpr2;
  adcp->adc->SQR1  = grpp->sqr1;
  adcp->adc->SQR2  = grpp->sqr2;
  adcp->adc->SQR3  = grpp->sqr3;

  /* ADC start by writing ADC_CR2_ADON a second time.*/
  adcp->adc->CR2   = cr2;
}

/**
 * @brief   Exchanges data on the SPI bus.
 * @details This asynchronous function starts a simultaneous transmit/receive
 *          operation.
 * @post    At the end of the operation the configured callback is invoked.
 * @note    The buffers are organized as uint8_t arrays for data sizes below or
 *          equal to 8 bits else it is organized as uint16_t arrays.
 *
 * @param[in] spip      pointer to the @p SPIDriver object
 * @param[in] n         number of words to be exchanged
 * @param[in] txbuf     the pointer to the transmit buffer
 * @param[out] rxbuf    the pointer to the receive buffer
 *
 * @notapi
 */
void spi_lld_exchange(SPIDriver *spip, size_t n,
                      const void *txbuf, void *rxbuf) {

  osalDbgAssert(n < 65536, "unsupported DMA transfer size");

  dmaStreamSetMemory0(spip->dmarx, rxbuf);
  dmaStreamSetTransactionSize(spip->dmarx, n);
  dmaStreamSetMode(spip->dmarx, spip->rxdmamode | STM32_DMA_CR_MINC);

  dmaStreamSetMemory0(spip->dmatx, txbuf);
  dmaStreamSetTransactionSize(spip->dmatx, n);
  dmaStreamSetMode(spip->dmatx, spip->txdmamode | STM32_DMA_CR_MINC);

  dmaStreamEnable(spip->dmarx);
  dmaStreamEnable(spip->dmatx);
}

/**
 * @brief   Starts an ADC conversion.
 *
 * @param[in] adcp      pointer to the @p ADCDriver object
 *
 * @notapi
 */
void adc_lld_start_conversion(ADCDriver *adcp) {
  uint32_t mode, cfgr1;
  const ADCConversionGroup *grpp = adcp->grpp;

  /* DMA setup.*/
  mode  = adcp->dmamode;
  cfgr1 = grpp->cfgr1 | ADC_CFGR1_DMAEN;
  if (grpp->circular) {
    mode  |= STM32_DMA_CR_CIRC;
    cfgr1 |= ADC_CFGR1_DMACFG;
    if (adcp->depth > 1) {
      /* If circular buffer depth > 1, then the half transfer interrupt
         is enabled in order to allow streaming processing.*/
      mode |= STM32_DMA_CR_HTIE;
    }
  }
  dmaStreamSetMemory0(adcp->dmastp, adcp->samples);
  dmaStreamSetTransactionSize(adcp->dmastp, (uint32_t)grpp->num_channels *
                                            (uint32_t)adcp->depth);
  dmaStreamSetMode(adcp->dmastp, mode);
  dmaStreamEnable(adcp->dmastp);

  /* ADC setup, if it is defined a callback for the analog watch dog then it
     is enabled.*/
  adcp->adc->ISR    = adcp->adc->ISR;
  adcp->adc->IER    = ADC_IER_OVRIE | ADC_IER_AWDIE;
  adcp->adc->TR     = grpp->tr;
  adcp->adc->SMPR   = grpp->smpr;
  adcp->adc->CHSELR = grpp->chselr;

  /* ADC configuration and start.*/
  adcp->adc->CFGR1  = cfgr1;
  adcp->adc->CR    |= ADC_CR_ADSTART;
}

void CmdUart_t::Init(uint32_t ABaudrate) {
    PWrite = TXBuf;
    PRead = TXBuf;
    IDmaIsIdle = true;
    IFullSlotsCount = 0;
    PinSetupAlterFunc(UART_GPIO, UART_TX_PIN, omPushPull, pudNone, UART_AF);

    // ==== USART configuration ====
    UART_RCC_ENABLE();
    UART->CR1 = USART_CR1_UE;     // Enable USART
    UART->BRR = Clk.APBFreqHz / ABaudrate;
    UART->CR2 = 0;
    // ==== DMA ====
    dmaStreamAllocate     (UART_DMA_TX, IRQ_PRIO_HIGH, CmdUartTxIrq, NULL);
    dmaStreamSetPeripheral(UART_DMA_TX, &UART->TDR);
    dmaStreamSetMode      (UART_DMA_TX, UART_DMA_TX_MODE);

#if UART_RX_ENABLED
    UART->CR1 = USART_CR1_TE | USART_CR1_RE;        // TX & RX enable
    UART->CR3 = USART_CR3_DMAT | USART_CR3_DMAR;    // Enable DMA at TX & RX

    PinSetupAlterFunc(UART_GPIO, UART_RX_PIN,  omOpenDrain, pudPullUp, UART_AF);

    dmaStreamAllocate     (UART_DMA_RX, IRQ_PRIO_LOW, nullptr, NULL);
    dmaStreamSetPeripheral(UART_DMA_RX, &UART->RDR);
    dmaStreamSetMemory0   (UART_DMA_RX, IRxBuf);
    dmaStreamSetTransactionSize(UART_DMA_RX, UART_RXBUF_SZ);
    dmaStreamSetMode      (UART_DMA_RX, UART_DMA_RX_MODE);
    dmaStreamEnable       (UART_DMA_RX);
#else
    UART->CR1 = USART_CR1_TE;     // Transmitter enabled
    UART->CR3 = USART_CR3_DMAT;   // Enable DMA at transmitter
#endif
    UART->CR1 |= USART_CR1_UE;    // Enable USART
}

/**
 * @brief   Sends data over the DAC bus.
 * @details This asynchronous function starts a transmit operation.
 * @post    At the end of the operation the configured callback is invoked.
 *
 * @param[in] dacp      pointer to the @p DACDriver object
 * @param[in] n         number of words to send
 * @param[in] txbuf     the pointer to the transmit buffer
 *
 * @notapi
 */
void dac_lld_start_conversion(DACDriver *dacp) {
  osalDbgAssert(dacp->samples, 
    "dacp->samples is NULL pointer");
  dmaStreamSetMemory0(dacp->dma, dacp->samples);
  dmaStreamSetTransactionSize(dacp->dma, dacp->depth);
  dmaStreamSetMode(dacp->dma, dacp->dmamode | STM32_DMA_CR_EN |
  STM32_DMA_CR_CIRC);
}

/**
 * @brief   Starts a transmission on the UART peripheral.
 * @note    The buffers are organized as uint8_t arrays for data sizes below
 *          or equal to 8 bits else it is organized as uint16_t arrays.
 *
 * @param[in] uartp     pointer to the @p UARTDriver object
 * @param[in] n         number of data frames to send
 * @param[in] txbuf     the pointer to the transmit buffer
 *
 * @notapi
 */
void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {

  /* TX DMA channel preparation and start.*/
  dmaStreamSetMemory0(uartp->dmatx, txbuf);
  dmaStreamSetTransactionSize(uartp->dmatx, n);
  dmaStreamSetMode(uartp->dmatx, uartp->dmamode    | STM32_DMA_CR_DIR_M2P |
                                 STM32_DMA_CR_MINC | STM32_DMA_CR_TCIE);
  dmaStreamEnable(uartp->dmatx);
}

void Adc_t::StartDMAMeasure() {
    (void)SPI_ADC->DR;  // Clear input register
    dmaStreamSetMemory0(DMA_ADC, &IRslt);
    dmaStreamSetTransactionSize(DMA_ADC, 3);
    dmaStreamSetMode(DMA_ADC, ADC_DMA_MODE);
    dmaStreamEnable(DMA_ADC);
    CsLo();
    ISpi.Enable();
}

uint8_t i2c_t::CmdWriteWrite(uint8_t Addr,
        uint8_t *WPtr1, uint8_t WLength1,
        uint8_t *WPtr2, uint8_t WLength2) {
    if(IBusyWait() != OK) return FAILURE;
    // Clear flags
    ii2c->SR1 = 0;
    while(RxIsNotEmpty()) (void)ii2c->DR;   // Read DR until it empty
    ClearAddrFlag();
    // Start transmission
    SendStart();
    if(WaitEv5() != OK) return FAILURE;
    SendAddrWithWrite(Addr);
    if(WaitEv6() != OK) { SendStop(); return FAILURE; }
    ClearAddrFlag();
    // Start TX DMA if needed
    if(WLength1 != 0) {
        if(WaitEv8() != OK) return FAILURE;
        dmaStreamSetMemory0(PDmaTx, WPtr1);
        dmaStreamSetMode   (PDmaTx, I2C_DMATX_MODE);
        dmaStreamSetTransactionSize(PDmaTx, WLength1);
        chSysLock();
        PRequestingThread = chThdSelf();
        dmaStreamEnable(PDmaTx);
        chSchGoSleepS(THD_STATE_SUSPENDED); // Sleep until end
        chSysUnlock();
        dmaStreamDisable(PDmaTx);
    }
    if(WLength2 != 0) {
        if(WaitEv8() != OK) return FAILURE;
        dmaStreamSetMemory0(PDmaTx, WPtr2);
        dmaStreamSetMode   (PDmaTx, I2C_DMATX_MODE);
        dmaStreamSetTransactionSize(PDmaTx, WLength2);
        chSysLock();
        PRequestingThread = chThdSelf();
        dmaStreamEnable(PDmaTx);
        chSchGoSleepS(THD_STATE_SUSPENDED); // Sleep until end
        chSysUnlock();
        dmaStreamDisable(PDmaTx);
    }
    WaitBTF();
    SendStop();
    return OK;
}

void Adc_t::StartMeasurement() {
    while(BitIsSet(ADC1->CR, ADC_CR_ADSTP));        // Wait until stop is completed
    // DMA
    dmaStreamSetMemory0(ADC_DMA, IBuf);
    dmaStreamSetTransactionSize(ADC_DMA, ADC_SEQ_LEN);
    dmaStreamSetMode(ADC_DMA, ADC_DMA_MODE);
    dmaStreamEnable(ADC_DMA);
    // ADC
    StartConversion();
}

void Sound_t::SendZeroes() {
//    Uart.Printf("sz\r");
    XDCS_Lo();  // Start data transmission
    uint32_t FLength = (ZeroesCount > 32)? 32 : ZeroesCount;
    dmaStreamSetMemory0(VS_DMA, &SZero);
    dmaStreamSetTransactionSize(VS_DMA, FLength);
    dmaStreamSetMode(VS_DMA, VS_DMA_MODE);  // Do not increase memory pointer
    dmaStreamEnable(VS_DMA);
    ZeroesCount -= FLength;
}

/**
 * @brief   Receives data via the I2C bus as master.
 * @details Number of receiving bytes must be more than 1 on STM32F1x. This is
 *          hardware restriction.
 *
 * @param[in] i2cp      pointer to the @p I2CDriver object
 * @param[in] addr      slave device address
 * @param[out] rxbuf    pointer to the receive buffer
 * @param[in] rxbytes   number of bytes to be received
 * @param[in] timeout   the number of ticks before the operation timeouts,
 *                      the following special values are allowed:
 *                      - @a TIME_INFINITE no timeout.
 *                      .
 * @return              The operation status.
 * @retval RDY_OK       if the function succeeded.
 * @retval RDY_RESET    if one or more I2C errors occurred, the errors can
 *                      be retrieved using @p i2cGetErrors().
 * @retval RDY_TIMEOUT  if a timeout occurred before operation end. <b>After a
 *                      timeout the driver must be stopped and restarted
 *                      because the bus is in an uncertain state</b>.
 *
 * @notapi
 */
msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
                                     uint8_t *rxbuf, size_t rxbytes,
                                     systime_t timeout) {
  I2C_TypeDef *dp = i2cp->i2c;
  VirtualTimer vt;

#if defined(STM32F1XX_I2C)
  chDbgCheck((rxbytes > 1), "i2c_lld_master_receive_timeout");
#endif

  /* Global timeout for the whole operation.*/
  if (timeout != TIME_INFINITE)
    chVTSetI(&vt, timeout, i2c_lld_safety_timeout, (void *)i2cp);

  /* Releases the lock from high level driver.*/
  chSysUnlock();

  /* Initializes driver fields, LSB = 1 -> receive.*/
  i2cp->addr = (addr << 1) | 0x01;
  i2cp->errors = 0;

  /* RX DMA setup.*/
  dmaStreamSetMode(i2cp->dmarx, i2cp->rxdmamode);
  dmaStreamSetMemory0(i2cp->dmarx, rxbuf);
  dmaStreamSetTransactionSize(i2cp->dmarx, rxbytes);

  /* Waits until BUSY flag is reset and the STOP from the previous operation
     is completed, alternatively for a timeout condition.*/
  while ((dp->SR2 & I2C_SR2_BUSY) || (dp->CR1 & I2C_CR1_STOP)) {
    chSysLock();
    if ((timeout != TIME_INFINITE) && !chVTIsArmedI(&vt))
      return RDY_TIMEOUT;
    chSysUnlock();
  }

  /* This lock will be released in high level driver.*/
  chSysLock();

  /* Atomic check on the timer in order to make sure that a timeout didn't
     happen outside the critical zone.*/
  if ((timeout != TIME_INFINITE) && !chVTIsArmedI(&vt))
    return RDY_TIMEOUT;

  /* Starts the operation.*/
  dp->CR2 |= I2C_CR2_ITEVTEN;
  dp->CR1 |= I2C_CR1_START | I2C_CR1_ACK;

  /* Waits for the operation completion or a timeout.*/
  i2cp->thread = chThdSelf();
  chSchGoSleepS(THD_STATE_SUSPENDED);
  if ((timeout != TIME_INFINITE) && chVTIsArmedI(&vt))
    chVTResetI(&vt);

  return chThdSelf()->p_u.rdymsg;
}