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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):& i: g8 x( `/ J# J, e
static void UPPInit(void)
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unsigned int temp_reg = 0;
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" ~8 C; y6 a2 ^% R- U // Channel B params
* H: f& J4 v+ ^/ U: r/ z* y CSL_FINST(temp_reg, UPP_UPCTL_DPFB, LJZF); //Left-justified, zero filled
8 p- S2 b) G, |7 e CSL_FINST(temp_reg, UPP_UPCTL_IWB, 8BIT); //8-bit interface
: Q4 V! r" M0 B' } CSL_FINST(temp_reg, UPP_UPCTL_DPWB, FULL); //Channel B bit width = 8
1 t) l2 m* `8 B, G* h CSL_FINST(temp_reg, UPP_UPCTL_DRB, SINGLE); //Single data rate
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6 e8 }, f& l( u8 c // Channel A params0 G# l8 k" u9 i1 M5 f2 q$ v( J8 z
CSL_FINST(temp_reg, UPP_UPCTL_DPFA, LJZF); //Left-justified, zero filled
. D1 K- M. f) f5 ~ CSL_FINST(temp_reg, UPP_UPCTL_IWA, 8BIT); //8-bit interface5 O6 }% }6 r* _2 t. R6 p
CSL_FINST(temp_reg, UPP_UPCTL_DPWA, FULL); //Channel A bit width = 8
0 K" M8 o: v9 g6 X4 d; Q CSL_FINST(temp_reg, UPP_UPCTL_DRA, SINGLE); //Single data rate
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CSL_FINST(temp_reg, UPP_UPCTL_CHN, TWO); //Channel A and Channel B are both active.) A& g5 {; _. T# M
CSL_FINST(temp_reg, UPP_UPCTL_MODE, DUPLEX0); //Channel B transmit Channel A receive1 J/ T6 Y. R2 o/ l( M" B) v
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upp_reg_hdl->UPCTL = temp_reg;$ E$ E& A) e3 B
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temp_reg = 0; 3 C( @. N, |+ H0 o) h
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// Channel A params! e: X" ]# ]8 H: G. z5 f
//CSL_FINST(temp_reg, UPP_UPICR_TRISA, ENABLE); //Channel A data pins are in a high-impedance state while idle
; {! M |# t. N2 L //CSL_FINS(temp_reg, UPP_UPICR_CLKDIVA, UPP_CLOCK_DIV); //Clock divisor3 D4 Z: K$ N2 P. P6 p, t/ g
CSL_FINST(temp_reg, UPP_UPICR_STARTA, ENABLE); //Channel A START Signal Enable.; q# \+ T- I) R6 |6 Z. G
CSL_FINST(temp_reg, UPP_UPICR_ENAA, ENABLE); //Channel A ENABLE Signal Enable
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// Channel B params8 Q6 g+ Z' ^$ H# b) T% F
CSL_FINS(temp_reg, UPP_UPICR_CLKDIVB, UPP_CLOCK_DIV);5 H3 C! ~4 z- g1 @
CSL_FINST(temp_reg, UPP_UPICR_STARTB, ENABLE); //Channel B START Signal Enable.4 H6 g! u0 {: s
CSL_FINST(temp_reg, UPP_UPICR_ENAB, ENABLE); //Channel B ENABLE Signal Enable9 Z7 f( J0 H: A1 U3 k
9 o* Y; ^, K3 K) { upp_reg_hdl->UPICR = temp_reg;
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I' R Z) w; r) |6 |$ ? //temp_reg = 0;. h3 S) \& `" }
- l. A5 S* h6 ?& }: B/ ]) I2 C //CSL_FINS(temp_reg, UPP_UPIVR_VALB, 0x7b7b); //Channel B idle value
7 u- z+ @% T' V4 R/ b0 O* P. T //CSL_FINS(temp_reg, UPP_UPIVR_VALA, 0x7f7f); //Channel A idle value
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//upp_reg_hdl->UPIVR = temp_reg;% \4 i+ `( F/ ?3 c; j- N0 S
9 W9 X( |2 `7 w0 @; T //temp_reg = 0;* ^- D. Z7 O$ P. [' s
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//CSL_FINST(temp_reg, UPP_UPTCR_RDSIZEI, 256B); //set 256B DMA I ' ~; ?/ S. {0 c) v& j0 h
//upp_reg_hdl->UPTCR = temp_reg;/ r/ `& j4 \) J3 A& n& X Q
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//temp_reg = 0;
% Q9 ~6 W( K* L4 g) A //CSL_FINST(temp_reg, UPP_UPDLB_BA, ENABLE); //B to A loopback mode enable
9 C/ j1 |- V3 a& w0 [+ O2 p/ L //upp_reg_hdl->UPDLB = temp_reg;
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