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) G B& c; p3 P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):( `9 M0 B& L) {# _
static void UPPInit(void)
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/ M1 F- O4 S/ B0 e4 `, h3 g2 S unsigned int temp_reg = 0;# E! s+ y) p) ]4 Z9 Q
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// Channel B params
5 V5 y \8 \2 L9 d3 X$ `' [ CSL_FINST(temp_reg, UPP_UPCTL_DPFB, LJZF); //Left-justified, zero filled
% M, w7 U( ]0 _/ g2 A) q CSL_FINST(temp_reg, UPP_UPCTL_IWB, 8BIT); //8-bit interface
4 u+ j' f" m0 e% @, F3 C1 C CSL_FINST(temp_reg, UPP_UPCTL_DPWB, FULL); //Channel B bit width = 8
' {0 _; F: a' O+ X1 G# \+ T CSL_FINST(temp_reg, UPP_UPCTL_DRB, SINGLE); //Single data rate. L2 _& Y" }! U+ L5 D C
|& l+ R" r N% D // Channel A params
3 F P0 P. p* T CSL_FINST(temp_reg, UPP_UPCTL_DPFA, LJZF); //Left-justified, zero filled
* V( O$ w8 U, ~ CSL_FINST(temp_reg, UPP_UPCTL_IWA, 8BIT); //8-bit interface
& A1 G9 e8 k" F CSL_FINST(temp_reg, UPP_UPCTL_DPWA, FULL); //Channel A bit width = 8( l0 z" i; E1 O2 z" F: y+ J7 ?5 ~
CSL_FINST(temp_reg, UPP_UPCTL_DRA, SINGLE); //Single data rate; \+ e( l% H0 T
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CSL_FINST(temp_reg, UPP_UPCTL_CHN, TWO); //Channel A and Channel B are both active.
: m8 }; u8 {: F. W8 d' W CSL_FINST(temp_reg, UPP_UPCTL_MODE, DUPLEX0); //Channel B transmit Channel A receive$ Q( Z, v1 c) u6 k7 t) t
) C2 r$ Y# I2 @4 @3 F$ V( ` E5 p upp_reg_hdl->UPCTL = temp_reg;
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temp_reg = 0;
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0 p1 }6 C$ x, z( t/ a, R- s // Channel A params2 E) R; n! N) W
//CSL_FINST(temp_reg, UPP_UPICR_TRISA, ENABLE); //Channel A data pins are in a high-impedance state while idle7 H* ?( b" x' e+ L$ h5 X# e
//CSL_FINS(temp_reg, UPP_UPICR_CLKDIVA, UPP_CLOCK_DIV); //Clock divisor
( _% Q3 L+ _' k" z9 M CSL_FINST(temp_reg, UPP_UPICR_STARTA, ENABLE); //Channel A START Signal Enable.; M' e/ u" g1 k6 p5 }" v/ r
CSL_FINST(temp_reg, UPP_UPICR_ENAA, ENABLE); //Channel A ENABLE Signal Enable2 |: {. [" R6 ]
) m% g% i( k; x // Channel B params
& d8 s( S, e) h; B3 }9 R CSL_FINS(temp_reg, UPP_UPICR_CLKDIVB, UPP_CLOCK_DIV);! M8 w) E' b; r, w t
CSL_FINST(temp_reg, UPP_UPICR_STARTB, ENABLE); //Channel B START Signal Enable.
: R; U" L2 [! \- f9 U CSL_FINST(temp_reg, UPP_UPICR_ENAB, ENABLE); //Channel B ENABLE Signal Enable
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upp_reg_hdl->UPICR = temp_reg;+ w" n0 j9 k4 ~3 f8 `! U/ \+ w
4 l' x/ t2 C, {* e6 W: k; Q //temp_reg = 0;
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//CSL_FINS(temp_reg, UPP_UPIVR_VALB, 0x7b7b); //Channel B idle value3 ]1 j; Z q+ i! Z1 k1 M
//CSL_FINS(temp_reg, UPP_UPIVR_VALA, 0x7f7f); //Channel A idle value+ F% H: t5 ~; q
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//upp_reg_hdl->UPIVR = temp_reg;. {7 N7 c/ a( J
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//temp_reg = 0;
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+ g/ v9 P" L2 v+ o0 z //CSL_FINST(temp_reg, UPP_UPTCR_RDSIZEI, 256B); //set 256B DMA I - ?: L1 W( p# q* h
//upp_reg_hdl->UPTCR = temp_reg;
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//temp_reg = 0;
& Z7 f S% U; H+ b0 o3 ? //CSL_FINST(temp_reg, UPP_UPDLB_BA, ENABLE); //B to A loopback mode enable
# |$ z2 B( z6 K, S- W; N1 q* s+ w //upp_reg_hdl->UPDLB = temp_reg;
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