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基于FPGA的SOPC嵌入式系統設計與典型實例
代碼片段和文件信息
#include?
#include?
#include?“system.h“
#include?“sys/alt_dma.h“
int?main(void)
{
????alt_dma_rxchan?rx;
????//創建DMA接收信道
????rx?=?alt_dma_rxchan_open(“/dev/dma_0“);
????//當信道創建成功
????if(rx?!=?NULL)
????{
????????printf(“Dma?transition?start.“);
????????while(1)
????????{
????????????//設置DMA傳輸的數據位寬?本例中為8位
????????????alt_dma_rxchan_ioctl(rxALT_DMA_SET_MODE_8NULL);
????????????//指定從uart接收數據
????????????alt_dma_rxchan_ioctl(rxALT_DMA_RX_ONLY_ON(void*)UART_0_base);
????????????
????????????//提交DMA接收請求?指定接收數據的位置(sdram)以及傳輸數據量
????????????if(alt_dma_rxchan_prepare(rx?
???????????????????????????????????????SDRAM_0_base?
???????????????????????????????????????1024?
???????????????????????????????????????NULL?
???????????????????????????????????????NULL)?0)
????????????{
????????????????printf?(“Error:?failed?to?post?receive?request\n“);
????????????}
????????????//關閉DMA接收信道
????????????alt_dma_rxchan_close(rx);
????????????usleep(1000000);
????????}
????}
????return?0;
}
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????1493500??2008-09-17?10:38??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.cmp.tdb
?????文件????2659436??2008-09-17?10:38??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.cmp0.ddb
?????文件?????125038??2008-09-17?10:38??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.cmp2.ddb
?????文件??????????0??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.dbp
?????文件????????136??2008-09-17?10:05??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.db_info
?????文件????????160??2008-09-17?16:25??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.eco.cdb
?????文件?????367585??2008-09-17?10:38??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.fit.qmsg
?????文件?????972740??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.hier_info
?????文件?????169897??2008-09-17?10:34??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.hif
?????文件?????343427??2008-09-17?10:35??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.map.cdb
?????文件?????217729??2008-09-17?10:35??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.map.hdb
?????文件????????406??2008-09-17?10:34??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.map.logdb
?????文件?????390130??2008-09-17?10:35??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.map.qmsg
?????文件?????704983??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.pre_map.cdb
?????文件?????321762??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.pre_map.hdb
?????文件??????????0??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.psp
?????文件??????????0??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.pss
?????文件?????318648??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.rtlv.hdb
?????文件?????572452??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.rtlv_sg.cdb
?????文件??????70253??2008-09-17?10:33??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.rtlv_sg_swap.cdb
?????文件?????342027??2008-09-17?10:34??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.sgdiff.cdb
?????文件?????348946??2008-09-17?10:34??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.sgdiff.hdb
?????文件????????607??2008-09-17?10:38??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.signalprobe.cdb
?????文件????????153??2008-09-17?16:24??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.sld_design_entry.sci
?????文件???????2229??2008-09-17?10:34??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.sld_design_entry_dsc.sci
?????文件???????1772??2008-09-17?10:34??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.smp_dump.txt
?????文件??????????0??2008-09-17?10:35??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.syn_hier_info
?????文件?????120365??2008-09-17?10:38??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\db\UART_DMA.tan.qmsg
?????文件??????30437??2008-09-17?10:58??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\dma_0.v
?????文件??????22528??2008-09-17?10:57??光盤文件\實例2??DMA_UART-SDRAM\UART_DMA\jtag_uart_0.v
............此處省略570個文件信息
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