usb_sil.c

/*****************************************************************************
 * Copyright (c) 2019, Nations Technologies Inc.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
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 * DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT,
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/**
 * @file usb_sil.c
 * @author Nations
 * @version v1.0.0
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#include "usb_lib.h"

/**
 * @brief Initialize the USB Device IP and the Endpoint 0.
 * @return Status.
 */
uint32_t USB_SilInit(void)
{
    /* USB interrupts initialization */
    /* clear pending interrupts */
    _SetISTR(0);
    wInterrupt_Mask = IMR_MSK;
    /* set interrupts mask */
    _SetCNTR(wInterrupt_Mask);
    return 0;
}

/**
 * @brief Write a buffer of data to a selected endpoint.
 * @param bEpAddr The address of the non control endpoint.
 * @param pBufferPointer The pointer to the buffer of data to be written to the endpoint.
 * @param wBufferSize Number of data to be written (in bytes).
 * @return Status.
 */
uint32_t USB_SilWrite(uint8_t bEpAddr, uint8_t* pBufferPointer, uint32_t wBufferSize)
{
    /* Use the memory interface function to write to the selected endpoint */
    USB_CopyUserToPMABuf(pBufferPointer, USB_GetEpTxAddr(bEpAddr & 0x7F), wBufferSize);
    /* Update the data length in the control register */
    USB_SetEpTxCnt((bEpAddr & 0x7F), wBufferSize);
    return 0;
}

/**
 * @brief Write a buffer of data to a selected endpoint.
 * @param bEpAddr The address of the non control endpoint.
 * @param pBufferPointer The pointer to which will be saved the received data buffer.
 * @return Number of received data (in Bytes).
 */
uint32_t USB_SilRead(uint8_t bEpAddr, uint8_t* pBufferPointer)
{
    uint32_t DataLength = 0;
    /* Get the number of received data on the selected Endpoint */
    DataLength = USB_GetEpRxCnt(bEpAddr & 0x7F);
    /* Use the memory interface function to write to the selected endpoint */
    USB_CopyPMAToUserBuf(pBufferPointer, USB_GetEpRxAddr(bEpAddr & 0x7F), DataLength);
    /* Return the number of received data */
    return DataLength;
}