📄 usbdma.lst
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if (endp == 4)
bEPPflags.bits.ep2_rxdma = 1; /* 标志逻辑端点2 DMA接收成功 Flag logic ep2 DMA receiving sucessful
-ly */
}
ARM COMPILER V2.53, USBdma 28/06/07 09:54:12 PAGE 4
USBEoTIntClr |= (0x01 << endp); /* 清除传输结束中断状态寄存器 clear end of transfer register */
USB_InitEndpointDD(endp); /* 重新初始化DD re-Initialize DD */
if ((endp % 2) != 0)
USBEPIntEn |= (0x01 << endp); /* 重新使能该端点从机中断 re-Enable the endpoint slave Interrupt
-*/
}
}
}
/********************************************************************************************************
-****
** 函数名称: USB_DMASystemError() Name : USB_DMASystemError()
** 功能描述: DMA 系统中断错误处理 Function : Process System Error Interrupt
*********************************************************************************************************
-***/
void USB_DMASystemError(void)
{
INT32U ep_st,endp;
ep_st = USBSysErrIntSt;
for (endp = 2; endp < 5; endp++)
{
if(ep_st & (0x01 << endp))
{
USB_InitEndpointDD(endp); /* 重新初始化DD re-Initialize DD */
USBEpDMAEn = (0x01 << endp); /* 重新使能该端点的DMA功能 re-enable Endpoint DMA */
USBSysErrIntClr |= (0x01 << endp); /* 清除系统错误中断 clear the System error interrupt */
if ((endp % 2) != 0)
USBEPIntEn |= (0x01 << endp); /* 重新使能该 IN 端点从机中断 re-Enable the IN endpoint slave Interr
-upt */
}
}
}
/********************************************************************************************************
-****
** 函数名称: USB_DMANewDDRequest() Name : USB_DMANewDDRequest()
** 功能描述: DMA 新 DD 请求中断处理 Function : Process New DD Request Interrupt
*********************************************************************************************************
-***/
void USB_DMANewDDRequest(void)
{
INT32U ep_st,endp;
ep_st = USBNDDRIntSt;
for (endp = 2; endp <= 5; endp++)
{
if(ep_st & (0x01 << endp))
{
USB_InitEndpointDD(endp); /* 重新初始化DD re-Initialize DD */
USBEpDMAEn = (0x01 << endp); /* 重新使能该端点的DMA功能 re-enable Endpoint DMA */
USBNDDRIntClr = (0x01 << endp); /* 清除新DD请求中断 clear the New DD Request Interrupt */
ARM COMPILER V2.53, USBdma 28/06/07 09:54:12 PAGE 5
if ((endp % 2) != 0)
USBEPIntEn |= (0x01 << endp); /* 重新使能该端点从机中断 re-Enable the endpoint slave Interrupt
-*/
}
}
}
/*
***********************************************************************
* 本文件用到的子程序 The Subprogram used by this file
***********************************************************************
*/
/********************************************************************************************************
-****
** 函数名称: USB_InitUdcaTable() Name : USB_InitUdcaTable()
** 功能描述: 初始化DMA引擎的UDCA寄存器 Function : Initialize the UDCA reigister and UDCA table
和UDCA表 of DMA engine
*********************************************************************************************************
-***/
void USB_InitUdcaTable(void)
{
INT32U *pUDCA;
USBUCDAH = USB_RAM_ADDRESS; /* 初始化UDCA头寄存器 Initialize the UDCA register */
pUDCA = (INT32U *)USBUCDAH; /* 取出UDCA寄存器值 Get the value of UDCA register */
pUDCA[2] = (INT32)DD_ADDRESS_EP02; /* 建立UDCA表 Build UDCA table */
pUDCA[3] = (INT32)DD_ADDRESS_EP03;
pUDCA[4] = (INT32)DD_ADDRESS_EP04;
pUDCA[5] = (INT32)DD_ADDRESS_EP05;
}
/********************************************************************************************************
-****
** 函数名称: USB_InitEndpointDD() Name : USB_InitEndpointDD()
** 功能描述: 初始化端点的DD Function : Initialize the DD of the endpoint
** 输 入: INT8U endp: 物理端点号 Input : INT8U endp: physical endpoint
** 输 出: 无 Output : NULL
*********************************************************************************************************
-***/
void USB_InitEndpointDD(INT8U endp)
{
DD_DESCRIPTOR *pDD = USB_GetDDPointer(endp); /* 取得 DD 指针 Get the DD pointer of the endpoint
-*/
pDD->next_dd_addr = 0; /* 清零两个成员 Clear two members */
pDD->status = 0;
switch(endp)
{
case 0x02: pDD->control = (EP1_PACKET_SIZE << 5) + /* 写端点信息包大小 Write endpoint packet size *
-/
(EP02_DMA_BUFFER_LENGTH << 16); /* 写DMA缓冲区大小 Write dma buffer size */
pDD->start_addr = DMA_BUFFER_ADDR_EP02; /* 写DMA缓冲区地址 Write dma buffer address */
break;
case 0x03: pDD->control = (EP1_PACKET_SIZE << 5) +
(EP03_DMA_BUFFER_LENGTH << 16);
pDD->start_addr = DMA_BUFFER_ADDR_EP03;
break;
case 0x04: pDD->control = (EP2_PACKET_SIZE << 5) +
(EP04_DMA_BUFFER_LENGTH << 16);
ARM COMPILER V2.53, USBdma 28/06/07 09:54:12 PAGE 6
pDD->start_addr = DMA_BUFFER_ADDR_EP04;
break;
case 0x05: pDD->control = (EP2_PACKET_SIZE << 5) +
(EP05_DMA_BUFFER_LENGTH << 16);
pDD->start_addr = DMA_BUFFER_ADDR_EP05;
break;
default: break;
}
}
/********************************************************************************************************
-****
** 函数名称: USB_GetDDPointer() Name : USB_GetDDPointer()
** 功能描述: 获取端点的DD指针 Function : Get the DD pointer of the endpoint
** 输 入: INT8U endp: 物理端点号 Input : INT8U endp: physical endpoint
** 返 回: DD_DESCRIPTOR * 端点的 DD 描述符指针 Return : the DD pointer of the endpoint
*********************************************************************************************************
-***/
DD_DESCRIPTOR *USB_GetDDPointer(INT8U endp)
{
INT32U dd_addr;
dd_addr = DD_BASE_ADDRESS + DD_SIZE * (endp - 2); /* 计算地址 calculate the address */
return (DD_DESCRIPTOR *)((INT32U *)dd_addr); /* 转换指针类型 change the type of the pointer */
}
#endif
324 /*******************************************************************************************************
325 ** End Of File
326 ********************************************************************************************************/
327
328
329
ARM COMPILER V2.53, USBdma 28/06/07 09:54:12 PAGE 7
ASSEMBLY LISTING OF GENERATED OBJECT CODE
Module Information Static
----------------------------------
code size = ------
data size = ------
const size = ------
End of Module Information.
ARM COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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