1 | //---------------------------------------------------------------------------- |
---|
2 | // user_logic.v - module |
---|
3 | //---------------------------------------------------------------------------- |
---|
4 | // |
---|
5 | // *************************************************************************** |
---|
6 | // ** Copyright (c) 1995-2012 Xilinx, Inc. All rights reserved. ** |
---|
7 | // ** ** |
---|
8 | // ** Xilinx, Inc. ** |
---|
9 | // ** XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" ** |
---|
10 | // ** AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND ** |
---|
11 | // ** SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE, ** |
---|
12 | // ** OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, ** |
---|
13 | // ** APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION ** |
---|
14 | // ** THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT, ** |
---|
15 | // ** AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE ** |
---|
16 | // ** FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY ** |
---|
17 | // ** WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE ** |
---|
18 | // ** IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR ** |
---|
19 | // ** REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF ** |
---|
20 | // ** INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ** |
---|
21 | // ** FOR A PARTICULAR PURPOSE. ** |
---|
22 | // ** ** |
---|
23 | // *************************************************************************** |
---|
24 | // |
---|
25 | //---------------------------------------------------------------------------- |
---|
26 | // Filename: user_logic.v |
---|
27 | // Version: 3.01.a |
---|
28 | // Description: User logic module. |
---|
29 | // Date: Sat Feb 23 21:53:35 2013 (by Create and Import Peripheral Wizard) |
---|
30 | // Verilog Standard: Verilog-2001 |
---|
31 | //---------------------------------------------------------------------------- |
---|
32 | // Naming Conventions: |
---|
33 | // active low signals: "*_n" |
---|
34 | // clock signals: "clk", "clk_div#", "clk_#x" |
---|
35 | // reset signals: "rst", "rst_n" |
---|
36 | // generics: "C_*" |
---|
37 | // user defined types: "*_TYPE" |
---|
38 | // state machine next state: "*_ns" |
---|
39 | // state machine current state: "*_cs" |
---|
40 | // combinatorial signals: "*_com" |
---|
41 | // pipelined or register delay signals: "*_d#" |
---|
42 | // counter signals: "*cnt*" |
---|
43 | // clock enable signals: "*_ce" |
---|
44 | // internal version of output port: "*_i" |
---|
45 | // device pins: "*_pin" |
---|
46 | // ports: "- Names begin with Uppercase" |
---|
47 | // processes: "*_PROCESS" |
---|
48 | // component instantiations: "<ENTITY_>I_<#|FUNC>" |
---|
49 | //---------------------------------------------------------------------------- |
---|
50 | |
---|
51 | `uselib lib=unisims_ver |
---|
52 | `uselib lib=proc_common_v3_00_a |
---|
53 | |
---|
54 | module user_logic |
---|
55 | ( |
---|
56 | // -- ADD USER PORTS BELOW THIS LINE --------------- |
---|
57 | at_boot_clk_in, |
---|
58 | at_boot_clk_in_valid, |
---|
59 | at_boot_clkbuf_clocks_invalid, |
---|
60 | at_boot_config_sw, |
---|
61 | |
---|
62 | uart_tx, |
---|
63 | |
---|
64 | iic_eeprom_scl_I, |
---|
65 | iic_eeprom_scl_O, |
---|
66 | iic_eeprom_scl_T, |
---|
67 | |
---|
68 | iic_eeprom_sda_I, |
---|
69 | iic_eeprom_sda_O, |
---|
70 | iic_eeprom_sda_T, |
---|
71 | |
---|
72 | samp_spi_sclk, |
---|
73 | samp_spi_mosi, |
---|
74 | samp_spi_miso, |
---|
75 | samp_spi_cs_n, |
---|
76 | samp_func, |
---|
77 | |
---|
78 | rfref_spi_sclk, |
---|
79 | rfref_spi_mosi, |
---|
80 | rfref_spi_miso, |
---|
81 | rfref_spi_cs_n, |
---|
82 | rfref_func, |
---|
83 | |
---|
84 | cm_spi_sclk, |
---|
85 | cm_spi_mosi, |
---|
86 | cm_spi_miso, |
---|
87 | cm_spi_cs_n, |
---|
88 | cm_pll_status, |
---|
89 | |
---|
90 | pll_refclk, |
---|
91 | |
---|
92 | usr_reset0, |
---|
93 | usr_reset1, |
---|
94 | usr_reset2, |
---|
95 | usr_reset3, |
---|
96 | |
---|
97 | usr_status, |
---|
98 | // -- ADD USER PORTS ABOVE THIS LINE --------------- |
---|
99 | |
---|
100 | // -- DO NOT EDIT BELOW THIS LINE ------------------ |
---|
101 | // -- Bus protocol ports, do not add to or delete |
---|
102 | Bus2IP_Clk, // Bus to IP clock |
---|
103 | Bus2IP_Resetn, // Bus to IP reset |
---|
104 | Bus2IP_Data, // Bus to IP data bus |
---|
105 | Bus2IP_BE, // Bus to IP byte enables |
---|
106 | Bus2IP_RdCE, // Bus to IP read chip enable |
---|
107 | Bus2IP_WrCE, // Bus to IP write chip enable |
---|
108 | IP2Bus_Data, // IP to Bus data bus |
---|
109 | IP2Bus_RdAck, // IP to Bus read transfer acknowledgement |
---|
110 | IP2Bus_WrAck, // IP to Bus write transfer acknowledgement |
---|
111 | IP2Bus_Error // IP to Bus error response |
---|
112 | // -- DO NOT EDIT ABOVE THIS LINE ------------------ |
---|
113 | ); // user_logic |
---|
114 | |
---|
115 | // -- ADD USER PARAMETERS BELOW THIS LINE ------------ |
---|
116 | // --USER parameters added here |
---|
117 | // -- ADD USER PARAMETERS ABOVE THIS LINE ------------ |
---|
118 | |
---|
119 | // -- DO NOT EDIT BELOW THIS LINE -------------------- |
---|
120 | // -- Bus protocol parameters, do not add to or delete |
---|
121 | parameter C_NUM_REG = 8; |
---|
122 | parameter C_SLV_DWIDTH = 32; |
---|
123 | // -- DO NOT EDIT ABOVE THIS LINE -------------------- |
---|
124 | |
---|
125 | // -- ADD USER PORTS BELOW THIS LINE ----------------- |
---|
126 | |
---|
127 | input at_boot_clk_in; |
---|
128 | input at_boot_clk_in_valid; |
---|
129 | output at_boot_clkbuf_clocks_invalid; |
---|
130 | input [2:0] at_boot_config_sw; |
---|
131 | |
---|
132 | output uart_tx; |
---|
133 | |
---|
134 | input iic_eeprom_scl_I; |
---|
135 | output iic_eeprom_scl_O; |
---|
136 | output iic_eeprom_scl_T; |
---|
137 | |
---|
138 | input iic_eeprom_sda_I; |
---|
139 | output iic_eeprom_sda_O; |
---|
140 | output iic_eeprom_sda_T; |
---|
141 | |
---|
142 | output samp_spi_sclk; |
---|
143 | output samp_spi_mosi; |
---|
144 | input samp_spi_miso; |
---|
145 | output samp_spi_cs_n; |
---|
146 | output samp_func; |
---|
147 | |
---|
148 | output rfref_spi_sclk; |
---|
149 | output rfref_spi_mosi; |
---|
150 | input rfref_spi_miso; |
---|
151 | output rfref_spi_cs_n; |
---|
152 | output rfref_func; |
---|
153 | |
---|
154 | output cm_spi_sclk; |
---|
155 | output cm_spi_mosi; |
---|
156 | input cm_spi_miso; |
---|
157 | output cm_spi_cs_n; |
---|
158 | input cm_pll_status; |
---|
159 | input pll_refclk; |
---|
160 | |
---|
161 | output usr_reset0; |
---|
162 | output usr_reset1; |
---|
163 | output usr_reset2; |
---|
164 | output usr_reset3; |
---|
165 | |
---|
166 | input [31:0] usr_status; |
---|
167 | // -- ADD USER PORTS ABOVE THIS LINE ----------------- |
---|
168 | |
---|
169 | // -- DO NOT EDIT BELOW THIS LINE -------------------- |
---|
170 | // -- Bus protocol ports, do not add to or delete |
---|
171 | input Bus2IP_Clk; |
---|
172 | input Bus2IP_Resetn; |
---|
173 | input [C_SLV_DWIDTH-1 : 0] Bus2IP_Data; |
---|
174 | input [C_SLV_DWIDTH/8-1 : 0] Bus2IP_BE; |
---|
175 | input [C_NUM_REG-1 : 0] Bus2IP_RdCE; |
---|
176 | input [C_NUM_REG-1 : 0] Bus2IP_WrCE; |
---|
177 | output [C_SLV_DWIDTH-1 : 0] IP2Bus_Data; |
---|
178 | output IP2Bus_RdAck; |
---|
179 | output IP2Bus_WrAck; |
---|
180 | output IP2Bus_Error; |
---|
181 | // -- DO NOT EDIT ABOVE THIS LINE -------------------- |
---|
182 | |
---|
183 | //---------------------------------------------------------------------------- |
---|
184 | // Implementation |
---|
185 | //---------------------------------------------------------------------------- |
---|
186 | |
---|
187 | // --USER nets declarations added here, as needed for user logic |
---|
188 | |
---|
189 | // Nets for user logic slave model s/w accessible register example |
---|
190 | reg [C_SLV_DWIDTH-1 : 0] slv_reg0; |
---|
191 | reg [C_SLV_DWIDTH-1 : 0] slv_reg1; |
---|
192 | reg [C_SLV_DWIDTH-1 : 0] slv_reg2; |
---|
193 | reg [C_SLV_DWIDTH-1 : 0] slv_reg3; |
---|
194 | reg [C_SLV_DWIDTH-1 : 0] slv_reg4; |
---|
195 | reg [C_SLV_DWIDTH-1 : 0] slv_reg5; |
---|
196 | reg [C_SLV_DWIDTH-1 : 0] slv_reg6; |
---|
197 | reg [C_SLV_DWIDTH-1 : 0] slv_reg7; |
---|
198 | wire [7 : 0] slv_reg_write_sel; |
---|
199 | wire [7 : 0] slv_reg_read_sel; |
---|
200 | reg [C_SLV_DWIDTH-1 : 0] slv_ip2bus_data; |
---|
201 | wire slv_read_ack; |
---|
202 | wire slv_write_ack; |
---|
203 | integer byte_index, bit_index; |
---|
204 | |
---|
205 | // USER logic implementation added here |
---|
206 | |
---|
207 | // ------------------------------------------------------ |
---|
208 | // Example code to read/write user logic slave model s/w accessible registers |
---|
209 | // |
---|
210 | // Note: |
---|
211 | // The example code presented here is to show you one way of reading/writing |
---|
212 | // software accessible registers implemented in the user logic slave model. |
---|
213 | // Each bit of the Bus2IP_WrCE/Bus2IP_RdCE signals is configured to correspond |
---|
214 | // to one software accessible register by the top level template. For example, |
---|
215 | // if you have four 32 bit software accessible registers in the user logic, |
---|
216 | // you are basically operating on the following memory mapped registers: |
---|
217 | // |
---|
218 | // Bus2IP_WrCE/Bus2IP_RdCE Memory Mapped Register |
---|
219 | // "1000" C_BASEADDR + 0x0 |
---|
220 | // "0100" C_BASEADDR + 0x4 |
---|
221 | // "0010" C_BASEADDR + 0x8 |
---|
222 | // "0001" C_BASEADDR + 0xC |
---|
223 | // |
---|
224 | // ------------------------------------------------------ |
---|
225 | |
---|
226 | wire [7:0] samp_spi_rx_byte; |
---|
227 | wire [7:0] rfref_spi_rx_byte; |
---|
228 | wire [7:0] cm_spi_rx_byte; |
---|
229 | |
---|
230 | reg [31:0] usr_status_d, usr_status_d1, usr_status_d2; |
---|
231 | |
---|
232 | assign slv_reg_write_sel = Bus2IP_WrCE[7:0]; |
---|
233 | assign slv_reg_read_sel = Bus2IP_RdCE[7:0]; |
---|
234 | |
---|
235 | //Removed [6] from _ack list, so slv_reg1 ack can be delayed following write to SPI Tx register |
---|
236 | assign slv_write_ack = Bus2IP_WrCE[0] || Bus2IP_WrCE[1] || Bus2IP_WrCE[2] || Bus2IP_WrCE[3] || Bus2IP_WrCE[4] || Bus2IP_WrCE[5] || Bus2IP_WrCE[7]; |
---|
237 | assign slv_read_ack = Bus2IP_RdCE[0] || Bus2IP_RdCE[1] || Bus2IP_RdCE[2] || Bus2IP_RdCE[3] || Bus2IP_RdCE[4] || Bus2IP_RdCE[5] || Bus2IP_RdCE[6] || Bus2IP_RdCE[7]; |
---|
238 | |
---|
239 | // implement slave model register(s) |
---|
240 | always @( posedge Bus2IP_Clk ) |
---|
241 | begin |
---|
242 | |
---|
243 | if ( Bus2IP_Resetn == 1'b0 ) |
---|
244 | begin |
---|
245 | slv_reg0 <= 0; |
---|
246 | slv_reg1 <= 0; |
---|
247 | slv_reg2 <= 0; |
---|
248 | slv_reg3 <= 0; |
---|
249 | slv_reg4 <= 0; |
---|
250 | slv_reg5 <= 0; |
---|
251 | slv_reg6 <= 0; |
---|
252 | slv_reg7 <= 0; |
---|
253 | end |
---|
254 | else |
---|
255 | case ( slv_reg_write_sel ) |
---|
256 | 8'b10000000 : |
---|
257 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
258 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
259 | slv_reg0[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
260 | 8'b01000000 : |
---|
261 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
262 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
263 | slv_reg1[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
264 | 8'b00100000 : |
---|
265 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
266 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
267 | slv_reg2[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
268 | 8'b00010000 : |
---|
269 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
270 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
271 | slv_reg3[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
272 | 8'b00001000 : |
---|
273 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
274 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
275 | slv_reg4[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
276 | 8'b00000100 : |
---|
277 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
278 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
279 | slv_reg5[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
280 | 8'b00000010 : |
---|
281 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
282 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
283 | slv_reg6[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
284 | 8'b00000001 : |
---|
285 | for ( byte_index = 0; byte_index <= (C_SLV_DWIDTH/8)-1; byte_index = byte_index+1 ) |
---|
286 | if ( Bus2IP_BE[byte_index] == 1 ) |
---|
287 | slv_reg7[(byte_index*8) +: 8] <= Bus2IP_Data[(byte_index*8) +: 8]; |
---|
288 | default : begin |
---|
289 | slv_reg0 <= slv_reg0; |
---|
290 | slv_reg1 <= slv_reg1; |
---|
291 | slv_reg2 <= slv_reg2; |
---|
292 | slv_reg3 <= slv_reg3; |
---|
293 | slv_reg4 <= slv_reg4; |
---|
294 | slv_reg5 <= slv_reg5; |
---|
295 | slv_reg6 <= slv_reg6; |
---|
296 | slv_reg7 <= slv_reg7; |
---|
297 | end |
---|
298 | endcase |
---|
299 | |
---|
300 | end // SLAVE_REG_WRITE_PROC |
---|
301 | |
---|
302 | // implement slave model register read mux |
---|
303 | always @* |
---|
304 | begin |
---|
305 | |
---|
306 | case ( slv_reg_read_sel ) |
---|
307 | 8'b10000000 : slv_ip2bus_data <= {cm_pll_status, at_boot_config_sw, 12'b0, slv_reg0[15:0]}; |
---|
308 | 8'b01000000 : slv_ip2bus_data <= slv_reg1; |
---|
309 | 8'b00100000 : slv_ip2bus_data <= {8'b0, cm_spi_rx_byte, rfref_spi_rx_byte, samp_spi_rx_byte}; |
---|
310 | 8'b00010000 : slv_ip2bus_data <= slv_reg3; |
---|
311 | 8'b00001000 : slv_ip2bus_data <= usr_status_d; |
---|
312 | 8'b00000100 : slv_ip2bus_data <= slv_reg5; |
---|
313 | 8'b00000010 : slv_ip2bus_data <= slv_reg6; |
---|
314 | 8'b00000001 : slv_ip2bus_data <= slv_reg7; |
---|
315 | default : slv_ip2bus_data <= 0; |
---|
316 | endcase |
---|
317 | |
---|
318 | end // SLAVE_REG_READ_PROC |
---|
319 | |
---|
320 | // ------------------------------------------------------------ |
---|
321 | // Example code to drive IP to Bus signals |
---|
322 | // ------------------------------------------------------------ |
---|
323 | |
---|
324 | assign IP2Bus_Data = (slv_read_ack == 1'b1) ? slv_ip2bus_data : 0 ; |
---|
325 | // assign IP2Bus_WrAck = slv_write_ack; //Overridden below |
---|
326 | assign IP2Bus_RdAck = slv_read_ack; |
---|
327 | assign IP2Bus_Error = 0; |
---|
328 | |
---|
329 | /* Address map: |
---|
330 | HDL is coded [MSB:LSB] = [31:0] |
---|
331 | regX[31] maps to 0x80000000 in C driver |
---|
332 | regX[0] maps to 0x00000001 in C driver |
---|
333 | |
---|
334 | 0: Config: |
---|
335 | [ 2: 0] Clock divider bit sel (00=0.5*busclk, 01=0.25*busclk, ...) 0x00000003 |
---|
336 | [ 3] Reserved |
---|
337 | [ 4] samp buf reset (active low) 0x00000010 |
---|
338 | [ 5] rf ref buf reset (active low) 0x00000020 |
---|
339 | [15: 6] Reserved 0x0000FFC0 |
---|
340 | [31:16] Clock module status 0xFFFF0000 |
---|
341 | |
---|
342 | 1: SPI Tx |
---|
343 | [ 7: 0] Tx data byte |
---|
344 | [14: 8] 7-bit register address (0x00 to 0xFF all valid) |
---|
345 | [20:15] 6'b0 (always zero) |
---|
346 | [22:21] Num bytes to Tx/Rx; must be 2'b0 for 1-byte Tx/Rx |
---|
347 | [ 23] RW# 1=Read, 0=Write |
---|
348 | [ 24] samp clock buffer chip select mask |
---|
349 | [ 25] rf ref clk buffer chip select mask |
---|
350 | [ 26] clock module clk buffer chip select mask |
---|
351 | [31:27] Reserved |
---|
352 | |
---|
353 | 2: SPI Rx: {samp_rxByte, rfref_rxByte, 16'b0} |
---|
354 | [ 7: 0] SPI Rx byte for samp buf 0x0000FF |
---|
355 | [15: 8] SPI Rx byte for rf ref buf 0x00FF00 |
---|
356 | [23:16] SPI Rx byte for clock module 0xFF0000 |
---|
357 | [31:24] Reserved 0xFF000000 |
---|
358 | |
---|
359 | 3: RW: User reset outputs |
---|
360 | [0] usr_reset0 |
---|
361 | [1] usr_reset1 |
---|
362 | [2] usr_reset2 |
---|
363 | [3] usr_reset3 |
---|
364 | [31:4] reserved |
---|
365 | |
---|
366 | 4: RO: User status inputs |
---|
367 | [31: 0] usr_status input |
---|
368 | |
---|
369 | 5-15: Reserved |
---|
370 | */ |
---|
371 | `define AD9512_SPI_XFER_LEN 5'd24 |
---|
372 | |
---|
373 | wire spi_mosi; |
---|
374 | wire spi_sclk; |
---|
375 | wire spi_cs; |
---|
376 | wire spi_rnw; |
---|
377 | wire spi_tx_reg_write; |
---|
378 | wire [2:0] clk_div_sel; |
---|
379 | wire spi_xfer_done; |
---|
380 | |
---|
381 | wire samp_spi_cs, rfref_spi_cs, cm_spi_cs; |
---|
382 | |
---|
383 | wire [31:0] samp_spi_rxData; |
---|
384 | wire [31:0] rfref_spi_rxData; |
---|
385 | wire [31:0] cm_spi_rxData; |
---|
386 | |
---|
387 | //Register the usr_status input here, to ease timing closure of potentially fast host PLBs |
---|
388 | always @(posedge Bus2IP_Clk) |
---|
389 | begin |
---|
390 | usr_status_d1 <= usr_status; |
---|
391 | usr_status_d2 <= usr_status_d1; |
---|
392 | usr_status_d <= usr_status_d2; |
---|
393 | end |
---|
394 | |
---|
395 | //Extract bits from IPIF slave registers and control signals |
---|
396 | |
---|
397 | //spi_io stores 32 bits for Tx/Rx |
---|
398 | // AD9512 only outputs 8-bit words during reads, always the last 8 bits of the transfer |
---|
399 | assign samp_spi_rx_byte = samp_spi_rxData[7:0]; |
---|
400 | assign rfref_spi_rx_byte = rfref_spi_rxData[7:0]; |
---|
401 | assign cm_spi_rx_byte = cm_spi_rxData[7:0]; |
---|
402 | |
---|
403 | //SPI clock divider selection |
---|
404 | assign clk_div_sel = slv_reg0[2:0]; //0x3 from driver |
---|
405 | |
---|
406 | //SPI device resets (active low) |
---|
407 | assign samp_func = 1'b1;//slv_reg0[4]; //0x10 from driver |
---|
408 | assign rfref_func = 1'b1;//slv_reg0[5]; //0x20 from driver |
---|
409 | |
---|
410 | //SPI device chip selects (active high; inverted before use below) |
---|
411 | assign samp_spi_cs = slv_reg1[24]; //0x01000000 from driver |
---|
412 | assign rfref_spi_cs = slv_reg1[25]; //0x02000000 from driver |
---|
413 | assign cm_spi_cs = slv_reg1[26]; //0x04000000 from driver |
---|
414 | |
---|
415 | //User reset outputs |
---|
416 | assign usr_reset0 = slv_reg3[0]; |
---|
417 | assign usr_reset1 = slv_reg3[1]; |
---|
418 | assign usr_reset2 = slv_reg3[2]; |
---|
419 | assign usr_reset3 = slv_reg3[3]; |
---|
420 | |
---|
421 | //Use the IPIC write-enable for the SPI Tx register as the SPI go |
---|
422 | // The bus will be paused until this core ACKs the write |
---|
423 | assign spi_tx_reg_write = Bus2IP_WrCE[6];//WrCE/RdCE busses are addressed CE[7:0]=slv_reg[0:7] |
---|
424 | |
---|
425 | //spi_tx_reg_write (Bus2IP_WrCE[6]) de-asserts as soon as transaction is ACK'd |
---|
426 | // so this mux switches back to the generic ACK as soon as the SPI xfer is done |
---|
427 | //Thus, the duration of assertion for spi_xfer_done doesn't really matter |
---|
428 | //A bit fast-n-loose, but works ok |
---|
429 | assign IP2Bus_WrAck = spi_tx_reg_write ? spi_xfer_done : slv_write_ack; |
---|
430 | |
---|
431 | //SPI device chip selects are active low |
---|
432 | //assign samp_spi_cs_n = ~(samp_spi_cs & spi_cs); //Overridden by at-boot logic |
---|
433 | //assign rfref_spi_cs_n = ~(rfref_spi_cs & spi_cs); |
---|
434 | //assign cm_spi_cs_n = ~(cm_spi_cs & spi_cs); |
---|
435 | |
---|
436 | //Mask each device's SPI clock output by its CS; no point toggling signals that will be ignored |
---|
437 | //assign samp_spi_sclk = (spi_sclk & samp_spi_cs); |
---|
438 | //assign rfref_spi_sclk = (spi_sclk & rfref_spi_cs); |
---|
439 | //assign cm_spi_sclk = (spi_sclk & cm_spi_cs); |
---|
440 | |
---|
441 | //All SPI devices driven by same serial data output; CS signals control who listens |
---|
442 | //assign samp_spi_mosi = samp_spi_cs ? spi_mosi : 1'b0; |
---|
443 | //assign rfref_spi_mosi = rfref_spi_cs ? spi_mosi : 1'b0; |
---|
444 | //assign cm_spi_mosi = cm_spi_cs ? spi_mosi : 1'b0; |
---|
445 | |
---|
446 | warp_spi_io #(.SPI_XFER_LEN(`AD9512_SPI_XFER_LEN)) spi_io |
---|
447 | ( |
---|
448 | .sys_clk(Bus2IP_Clk), |
---|
449 | .reset(~Bus2IP_Resetn), //warp_spi_io reset is active high |
---|
450 | .go(spi_tx_reg_write), |
---|
451 | .done(spi_xfer_done), |
---|
452 | .clkDiv(clk_div_sel), |
---|
453 | |
---|
454 | .currBitNum(), |
---|
455 | |
---|
456 | .txData(slv_reg1), |
---|
457 | |
---|
458 | .rxData1(samp_spi_rxData), |
---|
459 | .rxData2(rfref_spi_rxData), |
---|
460 | .rxData3(cm_spi_rxData), |
---|
461 | .rxData4(), |
---|
462 | |
---|
463 | .spi_cs(spi_cs), |
---|
464 | .spi_sclk(spi_sclk), |
---|
465 | |
---|
466 | .spi_mosi(spi_mosi), |
---|
467 | |
---|
468 | .spi_miso1(samp_spi_miso), |
---|
469 | .spi_miso2(rfref_spi_miso), |
---|
470 | .spi_miso3(cm_spi_miso), |
---|
471 | .spi_miso4(1'b0) |
---|
472 | ); |
---|
473 | |
---|
474 | /* At-boot Clock Config Logic |
---|
475 | This logic writes registers in the sampling clock AD9512 to: |
---|
476 | -Select the clock source (on-board oscillator or off-board via clock mod header) |
---|
477 | -Set the AD9512->FPGA divider to 1 (defaults to 2 on AD9512 reset) |
---|
478 | */ |
---|
479 | |
---|
480 | wire at_boot_clk_samp_spi_sclk; |
---|
481 | wire at_boot_clk_samp_spi_mosi; |
---|
482 | wire at_boot_clk_samp_spi_cs_n; |
---|
483 | |
---|
484 | wire at_boot_clk_rfref_spi_sclk; |
---|
485 | wire at_boot_clk_rfref_spi_mosi; |
---|
486 | wire at_boot_clk_rfref_spi_cs_n; |
---|
487 | |
---|
488 | wire at_boot_cm_spi_sclk; |
---|
489 | wire at_boot_cm_spi_mosi; |
---|
490 | wire at_boot_cm_spi_cs_n; |
---|
491 | |
---|
492 | wire clk_config_done; |
---|
493 | |
---|
494 | at_boot_clk_config boot_clk_config ( |
---|
495 | .clk(at_boot_clk_in), |
---|
496 | .clk_valid(at_boot_clk_in_valid), |
---|
497 | .pll_refclk(pll_refclk), |
---|
498 | |
---|
499 | .leds_red(), |
---|
500 | .leds_green(), |
---|
501 | |
---|
502 | .cm_switch(at_boot_config_sw), |
---|
503 | |
---|
504 | .uart_tx(uart_tx), |
---|
505 | |
---|
506 | .iic_eeprom_scl_I(iic_eeprom_scl_I), |
---|
507 | .iic_eeprom_scl_O(iic_eeprom_scl_O), |
---|
508 | .iic_eeprom_scl_T(iic_eeprom_scl_T), |
---|
509 | |
---|
510 | .iic_eeprom_sda_I(iic_eeprom_sda_I), |
---|
511 | .iic_eeprom_sda_O(iic_eeprom_sda_O), |
---|
512 | .iic_eeprom_sda_T(iic_eeprom_sda_T), |
---|
513 | |
---|
514 | .samp_spi_sclk(at_boot_clk_samp_spi_sclk), |
---|
515 | .samp_spi_mosi(at_boot_clk_samp_spi_mosi), |
---|
516 | .samp_spi_cs_n(at_boot_clk_samp_spi_cs_n), |
---|
517 | |
---|
518 | .rfref_spi_sclk(at_boot_clk_rfref_spi_sclk), |
---|
519 | .rfref_spi_mosi(at_boot_clk_rfref_spi_mosi), |
---|
520 | .rfref_spi_cs_n(at_boot_clk_rfref_spi_cs_n), |
---|
521 | |
---|
522 | .cm_spi_sclk(at_boot_cm_spi_sclk), |
---|
523 | .cm_spi_mosi(at_boot_cm_spi_mosi), |
---|
524 | .cm_spi_cs_n(at_boot_cm_spi_cs_n), |
---|
525 | |
---|
526 | .cm_pll_status(cm_pll_status), |
---|
527 | |
---|
528 | .clk_config_done(clk_config_done) |
---|
529 | ); |
---|
530 | |
---|
531 | //Mux all SPI outputs between at-boot logic and post-boot (software-controlled) SPI master |
---|
532 | assign samp_spi_sclk = clk_config_done ? (samp_spi_cs & spi_sclk) : at_boot_clk_samp_spi_sclk; |
---|
533 | assign samp_spi_mosi = clk_config_done ? (samp_spi_cs ? spi_mosi : 1'b0) : at_boot_clk_samp_spi_mosi; |
---|
534 | assign samp_spi_cs_n = clk_config_done ? (~(samp_spi_cs & spi_cs)) : at_boot_clk_samp_spi_cs_n; |
---|
535 | |
---|
536 | assign rfref_spi_sclk = clk_config_done ? (rfref_spi_cs & spi_sclk) : at_boot_clk_rfref_spi_sclk; |
---|
537 | assign rfref_spi_mosi = clk_config_done ? (rfref_spi_cs ? spi_mosi : 1'b0) : at_boot_clk_rfref_spi_mosi; |
---|
538 | assign rfref_spi_cs_n = clk_config_done ? (~(rfref_spi_cs & spi_cs)) : at_boot_clk_rfref_spi_cs_n; |
---|
539 | |
---|
540 | assign cm_spi_sclk = clk_config_done ? (cm_spi_cs & spi_sclk) : at_boot_cm_spi_sclk; |
---|
541 | assign cm_spi_mosi = clk_config_done ? (cm_spi_cs ? spi_mosi : 1'b0) : at_boot_cm_spi_mosi; |
---|
542 | assign cm_spi_cs_n = clk_config_done ? (~(cm_spi_cs & spi_cs)) : at_boot_cm_spi_cs_n; |
---|
543 | |
---|
544 | assign at_boot_clkbuf_clocks_invalid = ~clk_config_done; |
---|
545 | |
---|
546 | endmodule |
---|