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https://github.com/jialexd/sdk-ameba-v4.0c_180328.git
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111 lines
3.4 KiB
C
Executable file
111 lines
3.4 KiB
C
Executable file
/** mbed Microcontroller Library
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******************************************************************************
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* @file sys_api.c
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* @author
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* @version V1.0.0
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* @date 2016-08-01
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* @brief This file provides mbed GDMA API for memcopy
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******************************************************************************
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* @attention
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*
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* This module is a confidential and proprietary property of RealTek and
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* possession or use of this module requires written permission of RealTek.
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*
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* Copyright(c) 2016, Realtek Semiconductor Corporation. All rights reserved.
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******************************************************************************
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*/
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#include "dma_api.h"
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#include "cmsis.h"
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static void dma_memcpy_int(void *pData)
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{
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gdma_t *dma_obj = (gdma_t *)pData;
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/* Clean Auto Reload Bit */
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GDMA_ChCleanAutoReload(dma_obj->index, dma_obj->ch_num, CLEAN_RELOAD_DST);
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/* Clear Pending ISR */
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GDMA_ClearINT(dma_obj->index, dma_obj->ch_num);
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GDMA_Cmd(dma_obj->index, dma_obj->ch_num, DISABLE);
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if (dma_obj->user_cb != NULL) {
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dma_obj->user_cb((VOID*)dma_obj->user_cb_data);
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}
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}
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/**
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* @brief Initial the GDMA
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* @param dma_obj: the GDMA object
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* @param handler: the callback function for a DMA transfer complete.
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* @param id: the argument of the callback function.
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* @return None
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*
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*/
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void dma_memcpy_init(gdma_t *dma_obj, dma_irq_handler handler, uint32_t id)
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{
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u8 ch_num;
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dma_obj->index = 1;
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ch_num = GDMA_ChnlAlloc(dma_obj->index, (IRQ_FUN) dma_memcpy_int, (u32)dma_obj, 10);
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if (0xFF == ch_num) {
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DBG_8195A("%s: Cannot allocate a GDMA Channel\n", __FUNCTION__);
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return;
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}
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dma_obj->user_cb = (IRQ_FUN)handler;
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dma_obj->user_cb_data = id;
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dma_obj->ch_num = ch_num;
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}
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/**
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* @brief De-Initial the GDMA
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* @param dma_obj: the GDMA object
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* @return None
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*
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*/
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void dma_memcpy_deinit(gdma_t *dma_obj)
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{
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GDMA_ChnlFree(dma_obj->index, dma_obj->ch_num);
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}
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/**
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* @brief To do a memory copy by DMA
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* @param None
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* @return None
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*
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*/
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void dma_memcpy(gdma_t *dma_obj, void *dst, void* src, uint32_t len)
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{
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GDMA_InitTypeDef GDMA_InitStruct;
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_memset((void *)&GDMA_InitStruct, 0, sizeof(GDMA_InitTypeDef));
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GDMA_InitStruct.GDMA_ChNum = dma_obj->ch_num;
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GDMA_InitStruct.GDMA_Index = dma_obj->index;
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GDMA_InitStruct.GDMA_IsrType = (TransferType|ErrType);
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DBG_PRINTF(MODULE_GDMA, LEVEL_INFO, "%s: ==> Src=0x%x Dst=0x%x Len=%d\r\n", __FUNCTION__, src, dst, len);
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if ((((u32)src & 0x03)==0) && (((u32)dst & 0x03)==0) && ((len & 0x03)== 0)) {
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/* 4-bytes aligned, move 4 bytes each transfer */
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GDMA_InitStruct.GDMA_SrcMsize = MsizeEight;
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GDMA_InitStruct.GDMA_SrcDataWidth = TrWidthFourBytes;
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GDMA_InitStruct.GDMA_DstMsize = MsizeEight;
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GDMA_InitStruct.GDMA_DstDataWidth = TrWidthFourBytes;
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GDMA_InitStruct.GDMA_BlockSize = len >> 2;
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} else {
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GDMA_InitStruct.GDMA_SrcMsize = MsizeEight;
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GDMA_InitStruct.GDMA_SrcDataWidth = TrWidthOneByte;
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GDMA_InitStruct.GDMA_DstMsize = MsizeEight;
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GDMA_InitStruct.GDMA_DstDataWidth = TrWidthOneByte;
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GDMA_InitStruct.GDMA_BlockSize = len;
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}
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GDMA_InitStruct.GDMA_SrcAddr = (u32)src;
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GDMA_InitStruct.GDMA_DstAddr = (u32)dst;
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GDMA_Init(dma_obj->index, dma_obj->ch_num, &GDMA_InitStruct);
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GDMA_Cmd(dma_obj->index, dma_obj->ch_num, ENABLE);
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}
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/******************* (C) COPYRIGHT 2016 Realtek Semiconductor *****END OF FILE****/
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