Exemplos de CDC_Receive_BytesAvailable em C++ (Cpp)

Exemplo n.º 1

Arquivo: usbd_cdc_vcp.c Projeto: AndersHoglund/betaflight

/**
 * @brief  VCP_DataRx
 *         Data received over USB OUT endpoint are sent over CDC interface
 *         through this function.
 *
 *         @note
 *         This function will block any OUT packet reception on USB endpoint
 *         until exiting this function. If you exit this function before transfer
 *         is complete on CDC interface (ie. using DMA controller) it will result
 *         in receiving more data while previous ones are still not sent.
 *
 * @param  Buf: Buffer of data to be received
 * @param  Len: Number of data received (in bytes)
 * @retval Result of the opeartion: USBD_OK if all operations are OK else VCP_FAIL
 */
static uint16_t VCP_DataRx(uint8_t* Buf, uint32_t Len)
{
    if (CDC_Receive_BytesAvailable() + Len > APP_TX_DATA_SIZE) {
        return USBD_FAIL;
    }

    for (uint32_t i = 0; i < Len; i++) {
        APP_Tx_Buffer[APP_Tx_ptr_in] = Buf[i];
        APP_Tx_ptr_in = (APP_Tx_ptr_in + 1) % APP_TX_DATA_SIZE;
    }

    return USBD_OK;
}

Exemplo n.º 2

Arquivo: serial_usb_vcp.c Projeto: 4712/cleanflight

static uint32_t usbVcpAvailable(const serialPort_t *instance)
{
    UNUSED(instance);

    return CDC_Receive_BytesAvailable();
}