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& E3 V4 m( F) ` V+ c9 A寄存器初始化那里就给出来了啊,如果DSP要发数据给FPGA, 那么CLOCK是由DSP去控制的,如果DSP要接收FPGA的数据,则CLOCK是由FPGA控制的,START跟ENABLE信号是用来控制发送使能的。这是我的初始化配置(我是用8位宽度通信的,对于DSP来说,B是发送,A是接收):6 s/ i6 b" W+ f( K
static void UPPInit(void)
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unsigned int temp_reg = 0;
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, l$ L- N9 s9 E // Channel B params
( f4 o) ~* j; r: o7 c4 b ~; k CSL_FINST(temp_reg, UPP_UPCTL_DPFB, LJZF); //Left-justified, zero filled
5 V% A( p1 U: O& L+ z CSL_FINST(temp_reg, UPP_UPCTL_IWB, 8BIT); //8-bit interface+ Y4 t# {9 G- Y2 ]4 l3 Y' Z
CSL_FINST(temp_reg, UPP_UPCTL_DPWB, FULL); //Channel B bit width = 8
( b1 J; w$ B" | CSL_FINST(temp_reg, UPP_UPCTL_DRB, SINGLE); //Single data rate8 ~6 e+ r* w! l( l8 F& q" x
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// Channel A params' B8 f2 J/ e5 J& \9 o0 L
CSL_FINST(temp_reg, UPP_UPCTL_DPFA, LJZF); //Left-justified, zero filled' ^) {8 C; D8 ^3 b
CSL_FINST(temp_reg, UPP_UPCTL_IWA, 8BIT); //8-bit interface( I0 M( v% Q, Q* m1 J7 P5 u
CSL_FINST(temp_reg, UPP_UPCTL_DPWA, FULL); //Channel A bit width = 8% |7 S! @, \( I5 u4 Y, L. ]: A
CSL_FINST(temp_reg, UPP_UPCTL_DRA, SINGLE); //Single data rate, g+ s4 H9 Y+ X" Q
; P2 a8 W0 z# q* U% o% t CSL_FINST(temp_reg, UPP_UPCTL_CHN, TWO); //Channel A and Channel B are both active.9 T W2 w! o3 u) |6 C& o
CSL_FINST(temp_reg, UPP_UPCTL_MODE, DUPLEX0); //Channel B transmit Channel A receive
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1 Y+ A0 E' `% l2 i7 a/ { upp_reg_hdl->UPCTL = temp_reg;
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// Channel A params
& S" s! t; x9 Y //CSL_FINST(temp_reg, UPP_UPICR_TRISA, ENABLE); //Channel A data pins are in a high-impedance state while idle
- z# P. g$ E: [; s" T //CSL_FINS(temp_reg, UPP_UPICR_CLKDIVA, UPP_CLOCK_DIV); //Clock divisor
3 t! V: o/ l, ?! U. B/ j0 s3 } CSL_FINST(temp_reg, UPP_UPICR_STARTA, ENABLE); //Channel A START Signal Enable.3 H3 y: b0 c4 d
CSL_FINST(temp_reg, UPP_UPICR_ENAA, ENABLE); //Channel A ENABLE Signal Enable
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// Channel B params. `7 B3 A8 Y& k" }4 P5 \5 o
CSL_FINS(temp_reg, UPP_UPICR_CLKDIVB, UPP_CLOCK_DIV);3 J% d- L, M# ] h
CSL_FINST(temp_reg, UPP_UPICR_STARTB, ENABLE); //Channel B START Signal Enable.
4 r& k* u/ T$ l% b6 } CSL_FINST(temp_reg, UPP_UPICR_ENAB, ENABLE); //Channel B ENABLE Signal Enable
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9 O/ Q, E0 H7 X. h upp_reg_hdl->UPICR = temp_reg;4 @4 f) P. U! {
0 z$ O" c9 n4 I8 B1 q' m# v //temp_reg = 0;
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//CSL_FINS(temp_reg, UPP_UPIVR_VALB, 0x7b7b); //Channel B idle value" C4 S. f! H' X9 i3 V. b
//CSL_FINS(temp_reg, UPP_UPIVR_VALA, 0x7f7f); //Channel A idle value
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//upp_reg_hdl->UPIVR = temp_reg;
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//temp_reg = 0;( j k. u' s5 f# \+ }4 S7 \( _# @
. l* C% D; g) C. p //CSL_FINST(temp_reg, UPP_UPTCR_RDSIZEI, 256B); //set 256B DMA I
3 \3 |& w5 \+ U //upp_reg_hdl->UPTCR = temp_reg;4 d6 \3 K+ k% d) d
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//temp_reg = 0;0 r3 a* N2 [" \6 g% ?7 W
//CSL_FINST(temp_reg, UPP_UPDLB_BA, ENABLE); //B to A loopback mode enable. y' k* g9 {; Z
//upp_reg_hdl->UPDLB = temp_reg;9 ?( f+ T/ O4 S' r( f. j
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