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本帖最后由 liangws 于 2017-4-11 17:00 编辑
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; s) t& b1 S# x7 p问题描述:
7 b! w0 ?6 |% x; L在syslink模式下开发upp,在138端参考tl-upp_saver程序通过channel b发送数据到FPGA端,FPGA接收数据到FIFO,然后从FIFO端发送給138的upp channel A。fpga端程序通过仿真没有发现什么问题,具体方针波形如下:
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& h5 m9 Y! P+ _ M$ |图中的UPP_CH0*对应于138的Channel b通道,UPP_CH1*对应于138的channela通道。$ L2 A6 O: I4 p1 C4 z
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测试结果如下:
- G1 o* @$ E: m138端发送512字节,要连续发送8次,即8*512字节,接收端才能收满一个512字节数据,这个可能是什么问题引起的?
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备注:
" T% G" q6 Y, T' {% F* L& f$ e2 {1、看了upp相关文档,绑定的窗口地址WindowAddress要8字节对齐,tl-upp_saver例程中只有发送端upp_buffer_b有8字节对齐,接收端没有8字节对齐,这个是否有问题?我上述问题是否由于这个引起?
/ W4 v4 ?0 u4 |; ~2、相关代码如下:+ Y2 R2 l: B; O- d
//UPP DMA缓冲大小512字节
/ o" V: k" \& F+ }2 S7 G$ j#define UPP_DMA_BYTE_COUNT (64) //DMA行字节数,每行64个字节,行的字节必须是64的整数倍0 F r- t2 G7 l% P4 t) B
#define UPP_DMA_LINE_COUNT 8 //DMA行数, DMA行数 = DMA缓冲区大小/UPP_DMA_BYTE_COUNT
9 N" J4 H* @- f- d7 P) ?: N7 w#define UPP_DMA_BUFFER_SIZE (UPP_DMA_BYTE_COUNT * UPP_DMA_LINE_COUNT)1 U9 M5 O+ b7 D2 x* [% d
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//upp接收、发送buffer$ ~" V+ i6 b; @6 n3 J+ Y/ T* M$ h, M
#pragma DATA_ALIGN(upp_buffer_a, 8)
: }2 w2 {; e8 {, |; S! c( l3 o#pragma DATA_ALIGN(upp_buffer_b, 8)
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unsigned char upp_buffer_a[UPP_DMA_BUFFER_SIZE];6 T1 O% ?6 U3 ~: Q) d6 G
unsigned char upp_buffer_b[UPP_DMA_BUFFER_SIZE];
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static bool server_upp_data_recv(Server *server) # z9 z+ ]' S0 R- y& ?5 m& p
{
. p( z g" W$ N$ \2 h if(server->upp_channel_a_recv == false) {% a4 A, [8 l. v. {1 ?/ l) g* O
server_msg_send(server, APP_CMD_LOG, "upp recv: start");& d) `# {8 f* E. Q) f' _8 q
if(ListMP_empty(server->upp_recv_list_free) == FALSE) {
/ e1 ~6 P5 m' v7 _' O w8 S server_msg_send(server, APP_CMD_LOG, "upp recv: get node success");
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, B+ {1 L6 E. A& R2 Z$ b memset(upp_buffer_a, 0, UPP_DMA_BUFFER_SIZE);
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. A2 c8 u2 r: E9 S: N server->upp_channel_a_recv = true;//
c* l R" d* _" c server->transposeParA.WindowAddress = ((unsigned int *)upp_buffer_a);
! d. e t0 d: W1 h7 `% ~7 b& P server->transposeParA.LineCount = UPP_DMA_LINE_COUNT;
( d! U" P& @3 T& v, q5 ]: G9 N server->transposeParA.ByteCount = UPP_DMA_BYTE_COUNT;
1 P0 C" G- a" Q5 z! a) H& M! K. o server->transposeParA.LineOffsetAddress = UPP_DMA_BYTE_COUNT;//
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8 W; ]. ]: _ D* C upp_error_count = 0;- X, y( v3 T7 Y3 E
upp_dmai_int_cut = 0;
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// fill in data 2 n" j+ S$ z7 m9 W9 P8 D% ?' v9 X/ ]' n
uPPDMATransfer(SOC_UPP_0_REGS, uPP_DMA_CHI, &server->transposeParA);
( j4 C" [( u, Q4 @6 ~, F+ D- J3 U' }, F% T server_msg_send(server, APP_CMD_LOG, "upp recv: binding node to dma chi");
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! S7 ]% Z2 a- e else{
- a, w& o9 W' M$ }) m if (upp_dmai_int_cut > 0){
' m9 B$ n+ e$ u DataNode *node = (DataNode *)ListMP_getTail(server->upp_recv_list_free);
' E/ p* ~5 G8 a; K2 T4 f Uint8 *data = (Uint8 *)SharedRegion_getPtr(node->SR_buffer);
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//copy data to upp_recv_list_busy. ^ U9 _0 y! |
memcpy(data, upp_buffer_a, UPP_DMA_BUFFER_SIZE);* q; I2 S* U- d3 B: T. u
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//
, }4 \8 J. ], R9 L' H# s- ? ListMP_putHead(server->upp_recv_list_busy, (ListMP_Elem *)node);
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//! F0 r8 f9 ~. c% l& F. S: B! W
server->upp_channel_a_recv = false;//
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; f/ l) v2 ^' \+ B+ n7 C server_msg_send(server, APP_CMD_LOG, "upp recv: success");
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}
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return true;: `- P4 w& T9 m- |% j1 z! z. M
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/ i5 \# D6 r4 F# F C a1 Zstatic bool server_upp_data_send(Server *server)
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if(ListMP_empty(server->upp_send_list_busy) == FALSE){
) C+ n- U, Y* {( [2 R4 a5 r B DataNode *node = (DataNode *)ListMP_getTail(server->upp_send_list_busy);
: P5 C" C5 Q6 t$ b7 A unsigned char *data = (unsigned char *)SharedRegion_getPtr(node->SR_buffer);
' D& [4 h+ o! t. l9 n1 J char tmp[128] ={0};
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server_msg_send(server, APP_CMD_LOG, "upp send: start");
& S7 L( d$ O$ T. O( F, ]6 j# x; V; p print_log(server, data, 64);
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, B1 J+ E% J5 n ~' f //
( q7 J) ?% Q# {5 d$ s memset(upp_buffer_b, 0, UPP_DMA_BUFFER_SIZE);8 o+ [3 [' p3 i$ z' ^$ N
memcpy(upp_buffer_b, data, UPP_DMA_BUFFER_SIZE); k7 s7 j. O9 D: S$ |2 w4 b
print_log(server, upp_buffer_b, 64); D1 I8 J+ F7 q% C' n
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server->transposeParB.WindowAddress = ((unsigned int *)upp_buffer_b);
% e/ K" \2 c$ @7 \- p! L: Q server->transposeParB.LineCount = UPP_DMA_LINE_COUNT; / Z5 d# d. }2 h: J; F# Z f
server->transposeParB.ByteCount = UPP_DMA_BYTE_COUNT;$ Z I W* m7 z+ n
server->transposeParB.LineOffsetAddress = UPP_DMA_BYTE_COUNT;3 N/ j* |9 h: O9 I* E! X5 _% P
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memset(tmp, 0, sizeof(tmp));
% |/ t, D* \0 u- Z7 ?/ [5 Y sprintf(tmp, "upp send data: sizeof(unsigned int):%d, upp_buffer_b:%p, WindowAddress:%ud", ; H" @' z a4 w% T0 B
sizeof(unsigned int), upp_buffer_b, server->transposeParB.WindowAddress);
+ J8 i* o9 z& } server_msg_send(server, APP_CMD_LOG, tmp);1 z ]6 {% I. _
) r% A) h, Y2 c |0 W upp_error_count = 0;# {- n* \0 P. w! ]+ D! d
upp_dmaq_int_cut = 0;
g' ^- l: ^3 X% b // fill in data , p0 F, D4 B! M7 D9 J3 b( X
uPPDMATransfer(SOC_UPP_0_REGS, uPP_DMA_CHQ, &server->transposeParB); $ R; I7 v d. _ |2 |' l
server_msg_send(server, APP_CMD_LOG, "upp send: binding node to dma chq");
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# B1 T7 O$ ~. y0 u6 ~. U // wait send success
5 |3 y, _% ~7 R9 e8 A while (upp_dmaq_int_cut < 1 && upp_error_count == 0); & ~$ b6 d" x- ]/ r
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// make data node in free list 4 o& @. f. O; H+ ]. h
ListMP_putHead(server->upp_send_list_free, (ListMP_Elem *)node);
# M& R& R! _7 \# D4 f: \ server_msg_send(server, APP_CMD_LOG, "upp send: success");
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x* X$ U! R3 v, y- G2 Q" [9 { return true;8 |% b5 z" O* B. D! G
}
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