1 //----------------------------------------------------------------------------
2 // Copyright (C) 2001 Authors
4 // This source file may be used and distributed without restriction provided
5 // that this copyright statement is not removed from the file and that any
6 // derivative work contains the original copyright notice and the associated
9 // This source file is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU Lesser General Public License as published
11 // by the Free Software Foundation; either version 2.1 of the License, or
12 // (at your option) any later version.
14 // This source is distributed in the hope that it will be useful, but WITHOUT
15 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 // License for more details.
19 // You should have received a copy of the GNU Lesser General Public License
20 // along with this source; if not, write to the Free Software Foundation,
21 // Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 //----------------------------------------------------------------------------
25 // *File Name: omsp_timerA.v
27 // *Module Description:
31 // - Olivier Girard, olgirard@gmail.com
33 //----------------------------------------------------------------------------
35 // $LastChangedBy: olivier.girard $
36 // $LastChangedDate: 2009-12-29 20:10:34 +0100 (Tue, 29 Dec 2009) $
37 //----------------------------------------------------------------------------
38 `include "timescale.v"
39 `include "openMSP430_defines.v"
44 irq_ta0, // Timer A interrupt: TACCR0
45 irq_ta1, // Timer A interrupt: TAIV, TACCR1, TACCR2
46 per_dout, // Peripheral data output
47 ta_out0, // Timer A output 0
48 ta_out0_en, // Timer A output 0 enable
49 ta_out1, // Timer A output 1
50 ta_out1_en, // Timer A output 1 enable
51 ta_out2, // Timer A output 2
52 ta_out2_en, // Timer A output 2 enable
55 aclk_en, // ACLK enable (from CPU)
56 dbg_freeze, // Freeze Timer A counter
57 inclk, // INCLK external timer clock (SLOW)
58 irq_ta0_acc, // Interrupt request TACCR0 accepted
59 mclk, // Main system clock
60 per_addr, // Peripheral address
61 per_din, // Peripheral data input
62 per_en, // Peripheral enable (high active)
63 per_wen, // Peripheral write enable (high active)
64 puc, // Main system reset
65 smclk_en, // SMCLK enable (from CPU)
66 ta_cci0a, // Timer A capture 0 input A
67 ta_cci0b, // Timer A capture 0 input B
68 ta_cci1a, // Timer A capture 1 input A
69 ta_cci1b, // Timer A capture 1 input B
70 ta_cci2a, // Timer A capture 2 input A
71 ta_cci2b, // Timer A capture 2 input B
72 taclk // TACLK external timer clock (SLOW)
77 output irq_ta0; // Timer A interrupt: TACCR0
78 output irq_ta1; // Timer A interrupt: TAIV, TACCR1, TACCR2
79 output [15:0] per_dout; // Peripheral data output
80 output ta_out0; // Timer A output 0
81 output ta_out0_en; // Timer A output 0 enable
82 output ta_out1; // Timer A output 1
83 output ta_out1_en; // Timer A output 1 enable
84 output ta_out2; // Timer A output 2
85 output ta_out2_en; // Timer A output 2 enable
89 input aclk_en; // ACLK enable (from CPU)
90 input dbg_freeze; // Freeze Timer A counter
91 input inclk; // INCLK external timer clock (SLOW)
92 input irq_ta0_acc; // Interrupt request TACCR0 accepted
93 input mclk; // Main system clock
94 input [7:0] per_addr; // Peripheral address
95 input [15:0] per_din; // Peripheral data input
96 input per_en; // Peripheral enable (high active)
97 input [1:0] per_wen; // Peripheral write enable (high active)
98 input puc; // Main system reset
99 input smclk_en; // SMCLK enable (from CPU)
100 input ta_cci0a; // Timer A capture 0 input A
101 input ta_cci0b; // Timer A capture 0 input B
102 input ta_cci1a; // Timer A capture 1 input A
103 input ta_cci1b; // Timer A capture 1 input B
104 input ta_cci2a; // Timer A capture 2 input A
105 input ta_cci2b; // Timer A capture 2 input B
106 input taclk; // TACLK external timer clock (SLOW)
109 //=============================================================================
110 // 1) PARAMETER DECLARATION
111 //=============================================================================
113 // Register addresses
114 parameter TACTL = 9'h160;
115 parameter TAR = 9'h170;
116 parameter TACCTL0 = 9'h162;
117 parameter TACCR0 = 9'h172;
118 parameter TACCTL1 = 9'h164;
119 parameter TACCR1 = 9'h174;
120 parameter TACCTL2 = 9'h166;
121 parameter TACCR2 = 9'h176;
122 parameter TAIV = 9'h12E;
125 // Register one-hot decoder
126 parameter TACTL_D = (512'h1 << TACTL);
127 parameter TAR_D = (512'h1 << TAR);
128 parameter TACCTL0_D = (512'h1 << TACCTL0);
129 parameter TACCR0_D = (512'h1 << TACCR0);
130 parameter TACCTL1_D = (512'h1 << TACCTL1);
131 parameter TACCR1_D = (512'h1 << TACCR1);
132 parameter TACCTL2_D = (512'h1 << TACCTL2);
133 parameter TACCR2_D = (512'h1 << TACCR2);
134 parameter TAIV_D = (512'h1 << TAIV);
137 //============================================================================
138 // 2) REGISTER DECODER
139 //============================================================================
141 // Register address decode
144 case ({per_addr,1'b0})
145 TACTL : reg_dec = TACTL_D;
146 TAR : reg_dec = TAR_D;
147 TACCTL0: reg_dec = TACCTL0_D;
148 TACCR0 : reg_dec = TACCR0_D;
149 TACCTL1: reg_dec = TACCTL1_D;
150 TACCR1 : reg_dec = TACCR1_D;
151 TACCTL2: reg_dec = TACCTL2_D;
152 TACCR2 : reg_dec = TACCR2_D;
153 TAIV : reg_dec = TAIV_D;
154 default: reg_dec = {512{1'b0}};
158 wire reg_write = |per_wen & per_en;
159 wire reg_read = ~|per_wen & per_en;
161 // Read/Write vectors
162 wire [511:0] reg_wr = reg_dec & {512{reg_write}};
163 wire [511:0] reg_rd = reg_dec & {512{reg_read}};
166 //============================================================================
168 //============================================================================
174 wire tactl_wr = reg_wr[TACTL];
175 wire taclr = tactl_wr & per_din[`TACLR];
179 always @ (posedge mclk or posedge puc)
180 if (puc) tactl <= 10'h000;
181 else if (tactl_wr) tactl <= ((per_din[9:0] & 10'h3f3) | {9'h000, taifg_set}) & {9'h1ff, ~taifg_clr};
182 else tactl <= (tactl | {9'h000, taifg_set}) & {9'h1ff, ~taifg_clr};
189 wire tar_wr = reg_wr[TAR];
195 wire [15:0] tar_add = tar_inc ? 16'h0001 :
196 tar_dec ? 16'hffff : 16'h0000;
197 wire [15:0] tar_nxt = tar_clr ? 16'h0000 : (tar+tar_add);
199 always @ (posedge mclk or posedge puc)
200 if (puc) tar <= 16'h0000;
201 else if (tar_wr) tar <= per_din;
202 else if (taclr) tar <= 16'h0000;
203 else if (tar_clk & ~dbg_freeze) tar <= tar_nxt;
210 wire tacctl0_wr = reg_wr[TACCTL0];
214 always @ (posedge mclk or posedge puc)
215 if (puc) tacctl0 <= 16'h0000;
216 else if (tacctl0_wr) tacctl0 <= ((per_din & 16'hf9f7) | {14'h0000, cov0_set, ccifg0_set}) & {15'h7fff, ~irq_ta0_acc};
217 else tacctl0 <= (tacctl0 | {14'h0000, cov0_set, ccifg0_set}) & {15'h7fff, ~irq_ta0_acc};
221 wire [15:0] tacctl0_full = tacctl0 | {5'h00, scci0, 6'h00, cci0, 3'h0};
228 wire taccr0_wr = reg_wr[TACCR0];
231 always @ (posedge mclk or posedge puc)
232 if (puc) taccr0 <= 16'h0000;
233 else if (taccr0_wr) taccr0 <= per_din;
234 else if (cci0_cap) taccr0 <= tar;
241 wire tacctl1_wr = reg_wr[TACCTL1];
246 always @ (posedge mclk or posedge puc)
247 if (puc) tacctl1 <= 16'h0000;
248 else if (tacctl1_wr) tacctl1 <= ((per_din & 16'hf9f7) | {14'h0000, cov1_set, ccifg1_set}) & {15'h7fff, ~ccifg1_clr};
249 else tacctl1 <= (tacctl1 | {14'h0000, cov1_set, ccifg1_set}) & {15'h7fff, ~ccifg1_clr};
253 wire [15:0] tacctl1_full = tacctl1 | {5'h00, scci1, 6'h00, cci1, 3'h0};
260 wire taccr1_wr = reg_wr[TACCR1];
263 always @ (posedge mclk or posedge puc)
264 if (puc) taccr1 <= 16'h0000;
265 else if (taccr1_wr) taccr1 <= per_din;
266 else if (cci1_cap) taccr1 <= tar;
273 wire tacctl2_wr = reg_wr[TACCTL2];
278 always @ (posedge mclk or posedge puc)
279 if (puc) tacctl2 <= 16'h0000;
280 else if (tacctl2_wr) tacctl2 <= ((per_din & 16'hf9f7) | {14'h0000, cov2_set, ccifg2_set}) & {15'h7fff, ~ccifg2_clr};
281 else tacctl2 <= (tacctl2 | {14'h0000, cov2_set, ccifg2_set}) & {15'h7fff, ~ccifg2_clr};
285 wire [15:0] tacctl2_full = tacctl2 | {5'h00, scci2, 6'h00, cci2, 3'h0};
292 wire taccr2_wr = reg_wr[TACCR2];
295 always @ (posedge mclk or posedge puc)
296 if (puc) taccr2 <= 16'h0000;
297 else if (taccr2_wr) taccr2 <= per_din;
298 else if (cci2_cap) taccr2 <= tar;
304 wire [3:0] taiv = (tacctl1[`TACCIFG] & tacctl1[`TACCIE]) ? 4'h2 :
305 (tacctl2[`TACCIFG] & tacctl2[`TACCIE]) ? 4'h4 :
306 (tactl[`TAIFG] & tactl[`TAIE]) ? 4'hA :
309 assign ccifg1_clr = (reg_rd[TAIV] | reg_wr[TAIV]) & (taiv==4'h2);
310 assign ccifg2_clr = (reg_rd[TAIV] | reg_wr[TAIV]) & (taiv==4'h4);
311 assign taifg_clr = (reg_rd[TAIV] | reg_wr[TAIV]) & (taiv==4'hA);
314 //============================================================================
315 // 4) DATA OUTPUT GENERATION
316 //============================================================================
319 wire [15:0] tactl_rd = {6'h00, tactl} & {16{reg_rd[TACTL]}};
320 wire [15:0] tar_rd = tar & {16{reg_rd[TAR]}};
321 wire [15:0] tacctl0_rd = tacctl0_full & {16{reg_rd[TACCTL0]}};
322 wire [15:0] taccr0_rd = taccr0 & {16{reg_rd[TACCR0]}};
323 wire [15:0] tacctl1_rd = tacctl1_full & {16{reg_rd[TACCTL1]}};
324 wire [15:0] taccr1_rd = taccr1 & {16{reg_rd[TACCR1]}};
325 wire [15:0] tacctl2_rd = tacctl2_full & {16{reg_rd[TACCTL2]}};
326 wire [15:0] taccr2_rd = taccr2 & {16{reg_rd[TACCR2]}};
327 wire [15:0] taiv_rd = {12'h000, taiv} & {16{reg_rd[TAIV]}};
329 wire [15:0] per_dout = tactl_rd |
340 //============================================================================
341 // 5) Timer A counter control
342 //============================================================================
344 // Clock input synchronization (TACLK & INCLK)
345 //-----------------------------------------------------------
348 always @ (posedge mclk or posedge puc)
349 if (puc) taclk_s <= 3'b000;
350 else taclk_s <= {taclk_s[1:0], taclk};
352 wire taclk_en = taclk_s[1] & ~taclk_s[2];
357 always @ (posedge mclk or posedge puc)
358 if (puc) inclk_s <= 3'b000;
359 else inclk_s <= {inclk_s[1:0], inclk};
361 wire inclk_en = inclk_s[1] & ~inclk_s[2];
364 // Timer clock input mux
365 //-----------------------------------------------------------
367 wire sel_clk = (tactl[`TASSELx]==2'b00) ? taclk_en :
368 (tactl[`TASSELx]==2'b01) ? aclk_en :
369 (tactl[`TASSELx]==2'b10) ? smclk_en : inclk_en;
372 // Generate update pluse for the counter (<=> divided clock)
373 //-----------------------------------------------------------
376 assign tar_clk = sel_clk & ((tactl[`TAIDx]==2'b00) ? 1'b1 :
377 (tactl[`TAIDx]==2'b01) ? clk_div[0] :
378 (tactl[`TAIDx]==2'b10) ? &clk_div[1:0] :
381 always @ (posedge mclk or posedge puc)
382 if (puc) clk_div <= 3'h0;
383 else if (tar_clk | taclr) clk_div <= 3'h0;
384 else if ((tactl[`TAMCx]!=2'b00) & sel_clk) clk_div <= clk_div+3'h1;
387 // Time counter control signals
388 //-----------------------------------------------------------
390 assign tar_clr = ((tactl[`TAMCx]==2'b01) & (tar>=taccr0)) |
391 ((tactl[`TAMCx]==2'b11) & (taccr0==16'h0000));
393 assign tar_inc = (tactl[`TAMCx]==2'b01) | (tactl[`TAMCx]==2'b10) |
394 ((tactl[`TAMCx]==2'b11) & ~tar_dec);
397 always @ (posedge mclk or posedge puc)
398 if (puc) tar_dir <= 1'b0;
399 else if (taclr) tar_dir <= 1'b0;
400 else if (tactl[`TAMCx]==2'b11)
402 if (tar_clk & (tar==16'h0001)) tar_dir <= 1'b0;
403 else if (tar>=taccr0) tar_dir <= 1'b1;
405 else tar_dir <= 1'b0;
407 assign tar_dec = tar_dir | ((tactl[`TAMCx]==2'b11) & (tar>=taccr0));
410 //============================================================================
411 // 6) Timer A comparator
412 //============================================================================
414 wire equ0 = (tar_nxt==taccr0) & (tar!=taccr0);
415 wire equ1 = (tar_nxt==taccr1) & (tar!=taccr1);
416 wire equ2 = (tar_nxt==taccr2) & (tar!=taccr2);
419 //============================================================================
420 // 7) Timer A capture logic
421 //============================================================================
425 assign cci0 = (tacctl0[`TACCISx]==2'b00) ? ta_cci0a :
426 (tacctl0[`TACCISx]==2'b01) ? ta_cci0b :
427 (tacctl0[`TACCISx]==2'b10) ? 1'b0 : 1'b1;
429 assign cci1 = (tacctl1[`TACCISx]==2'b00) ? ta_cci1a :
430 (tacctl1[`TACCISx]==2'b01) ? ta_cci1b :
431 (tacctl1[`TACCISx]==2'b10) ? 1'b0 : 1'b1;
433 assign cci2 = (tacctl2[`TACCISx]==2'b00) ? ta_cci2a :
434 (tacctl2[`TACCISx]==2'b01) ? ta_cci2b :
435 (tacctl2[`TACCISx]==2'b10) ? 1'b0 : 1'b1;
437 // Register CCIx for synchronization and edge detection
439 always @ (posedge mclk or posedge puc)
440 if (puc) cci_s <= 3'h0;
441 else cci_s <= {cci2, cci1, cci0};
443 always @ (posedge mclk or posedge puc)
444 if (puc) cci_ss <= 3'h0;
445 else cci_ss <= cci_s;
447 always @ (posedge mclk or posedge puc)
448 if (puc) cci_sss <= 3'h0;
449 else cci_sss <= cci_ss;
455 always @ (posedge mclk or posedge puc)
456 if (puc) scci0 <= 1'b0;
457 else if (tar_clk & equ0) scci0 <= cci_ss[0];
459 always @ (posedge mclk or posedge puc)
460 if (puc) scci1 <= 1'b0;
461 else if (tar_clk & equ1) scci1 <= cci_ss[1];
463 always @ (posedge mclk or posedge puc)
464 if (puc) scci2 <= 1'b0;
465 else if (tar_clk & equ2) scci2 <= cci_ss[2];
470 wire cci0_evt = (tacctl0[`TACMx]==2'b00) ? 1'b0 :
471 (tacctl0[`TACMx]==2'b01) ? ( cci_ss[0] & ~cci_sss[0]) : // Rising edge
472 (tacctl0[`TACMx]==2'b10) ? (~cci_ss[0] & cci_sss[0]) : // Falling edge
473 ( cci_ss[0] ^ cci_sss[0]); // Both edges
475 wire cci1_evt = (tacctl1[`TACMx]==2'b00) ? 1'b0 :
476 (tacctl1[`TACMx]==2'b01) ? ( cci_ss[1] & ~cci_sss[1]) : // Rising edge
477 (tacctl1[`TACMx]==2'b10) ? (~cci_ss[1] & cci_sss[1]) : // Falling edge
478 ( cci_ss[1] ^ cci_sss[1]); // Both edges
480 wire cci2_evt = (tacctl2[`TACMx]==2'b00) ? 1'b0 :
481 (tacctl2[`TACMx]==2'b01) ? ( cci_ss[2] & ~cci_sss[2]) : // Rising edge
482 (tacctl2[`TACMx]==2'b10) ? (~cci_ss[2] & cci_sss[2]) : // Falling edge
483 ( cci_ss[2] ^ cci_sss[2]); // Both edges
485 // Event Synchronization
486 //-----------------------
489 always @ (posedge mclk or posedge puc)
490 if (puc) cci0_evt_s <= 1'b0;
491 else if (tar_clk) cci0_evt_s <= 1'b0;
492 else if (cci0_evt) cci0_evt_s <= 1'b1;
495 always @ (posedge mclk or posedge puc)
496 if (puc) cci1_evt_s <= 1'b0;
497 else if (tar_clk) cci1_evt_s <= 1'b0;
498 else if (cci1_evt) cci1_evt_s <= 1'b1;
501 always @ (posedge mclk or posedge puc)
502 if (puc) cci2_evt_s <= 1'b0;
503 else if (tar_clk) cci2_evt_s <= 1'b0;
504 else if (cci2_evt) cci2_evt_s <= 1'b1;
507 always @ (posedge mclk or posedge puc)
508 if (puc) cci0_sync <= 1'b0;
509 else cci0_sync <= (tar_clk & cci0_evt_s) | (tar_clk & cci0_evt & ~cci0_evt_s);
512 always @ (posedge mclk or posedge puc)
513 if (puc) cci1_sync <= 1'b0;
514 else cci1_sync <= (tar_clk & cci1_evt_s) | (tar_clk & cci1_evt & ~cci1_evt_s);
517 always @ (posedge mclk or posedge puc)
518 if (puc) cci2_sync <= 1'b0;
519 else cci2_sync <= (tar_clk & cci2_evt_s) | (tar_clk & cci2_evt & ~cci2_evt_s);
522 // Generate final capture command
523 //-----------------------------------
525 assign cci0_cap = tacctl0[`TASCS] ? cci0_sync : cci0_evt;
526 assign cci1_cap = tacctl1[`TASCS] ? cci1_sync : cci1_evt;
527 assign cci2_cap = tacctl2[`TASCS] ? cci2_sync : cci2_evt;
530 // Generate capture overflow flag
531 //-----------------------------------
534 wire cap0_taken_clr = reg_rd[TACCR0] | (tacctl0_wr & tacctl0[`TACOV] & ~per_din[`TACOV]);
535 always @ (posedge mclk or posedge puc)
536 if (puc) cap0_taken <= 1'b0;
537 else if (cci0_cap) cap0_taken <= 1'b1;
538 else if (cap0_taken_clr) cap0_taken <= 1'b0;
541 wire cap1_taken_clr = reg_rd[TACCR1] | (tacctl1_wr & tacctl1[`TACOV] & ~per_din[`TACOV]);
542 always @ (posedge mclk or posedge puc)
543 if (puc) cap1_taken <= 1'b0;
544 else if (cci1_cap) cap1_taken <= 1'b1;
545 else if (cap1_taken_clr) cap1_taken <= 1'b0;
548 wire cap2_taken_clr = reg_rd[TACCR2] | (tacctl2_wr & tacctl2[`TACOV] & ~per_din[`TACOV]);
549 always @ (posedge mclk or posedge puc)
550 if (puc) cap2_taken <= 1'b0;
551 else if (cci2_cap) cap2_taken <= 1'b1;
552 else if (cap2_taken_clr) cap2_taken <= 1'b0;
555 assign cov0_set = cap0_taken & cci0_cap & ~reg_rd[TACCR0];
556 assign cov1_set = cap1_taken & cci1_cap & ~reg_rd[TACCR1];
557 assign cov2_set = cap2_taken & cci2_cap & ~reg_rd[TACCR2];
560 //============================================================================
561 // 8) Timer A output unit
562 //============================================================================
565 //-------------------
568 wire ta_out0_mode0 = tacctl0[`TAOUT]; // Output
569 wire ta_out0_mode1 = equ0 ? 1'b1 : ta_out0; // Set
570 wire ta_out0_mode2 = equ0 ? ~ta_out0 : // Toggle/Reset
571 equ0 ? 1'b0 : ta_out0;
572 wire ta_out0_mode3 = equ0 ? 1'b1 : // Set/Reset
573 equ0 ? 1'b0 : ta_out0;
574 wire ta_out0_mode4 = equ0 ? ~ta_out0 : ta_out0; // Toggle
575 wire ta_out0_mode5 = equ0 ? 1'b0 : ta_out0; // Reset
576 wire ta_out0_mode6 = equ0 ? ~ta_out0 : // Toggle/Set
577 equ0 ? 1'b1 : ta_out0;
578 wire ta_out0_mode7 = equ0 ? 1'b0 : // Reset/Set
579 equ0 ? 1'b1 : ta_out0;
581 wire ta_out0_nxt = (tacctl0[`TAOUTMODx]==3'b000) ? ta_out0_mode0 :
582 (tacctl0[`TAOUTMODx]==3'b001) ? ta_out0_mode1 :
583 (tacctl0[`TAOUTMODx]==3'b010) ? ta_out0_mode2 :
584 (tacctl0[`TAOUTMODx]==3'b011) ? ta_out0_mode3 :
585 (tacctl0[`TAOUTMODx]==3'b100) ? ta_out0_mode4 :
586 (tacctl0[`TAOUTMODx]==3'b101) ? ta_out0_mode5 :
587 (tacctl0[`TAOUTMODx]==3'b110) ? ta_out0_mode6 :
590 always @ (posedge mclk or posedge puc)
591 if (puc) ta_out0 <= 1'b0;
592 else if ((tacctl0[`TAOUTMODx]==3'b001) & taclr) ta_out0 <= 1'b0;
593 else if (tar_clk) ta_out0 <= ta_out0_nxt;
595 assign ta_out0_en = ~tacctl0[`TACAP];
599 //-------------------
602 wire ta_out1_mode0 = tacctl1[`TAOUT]; // Output
603 wire ta_out1_mode1 = equ1 ? 1'b1 : ta_out1; // Set
604 wire ta_out1_mode2 = equ1 ? ~ta_out1 : // Toggle/Reset
605 equ0 ? 1'b0 : ta_out1;
606 wire ta_out1_mode3 = equ1 ? 1'b1 : // Set/Reset
607 equ0 ? 1'b0 : ta_out1;
608 wire ta_out1_mode4 = equ1 ? ~ta_out1 : ta_out1; // Toggle
609 wire ta_out1_mode5 = equ1 ? 1'b0 : ta_out1; // Reset
610 wire ta_out1_mode6 = equ1 ? ~ta_out1 : // Toggle/Set
611 equ0 ? 1'b1 : ta_out1;
612 wire ta_out1_mode7 = equ1 ? 1'b0 : // Reset/Set
613 equ0 ? 1'b1 : ta_out1;
615 wire ta_out1_nxt = (tacctl1[`TAOUTMODx]==3'b000) ? ta_out1_mode0 :
616 (tacctl1[`TAOUTMODx]==3'b001) ? ta_out1_mode1 :
617 (tacctl1[`TAOUTMODx]==3'b010) ? ta_out1_mode2 :
618 (tacctl1[`TAOUTMODx]==3'b011) ? ta_out1_mode3 :
619 (tacctl1[`TAOUTMODx]==3'b100) ? ta_out1_mode4 :
620 (tacctl1[`TAOUTMODx]==3'b101) ? ta_out1_mode5 :
621 (tacctl1[`TAOUTMODx]==3'b110) ? ta_out1_mode6 :
624 always @ (posedge mclk or posedge puc)
625 if (puc) ta_out1 <= 1'b0;
626 else if ((tacctl1[`TAOUTMODx]==3'b001) & taclr) ta_out1 <= 1'b0;
627 else if (tar_clk) ta_out1 <= ta_out1_nxt;
629 assign ta_out1_en = ~tacctl1[`TACAP];
633 //-------------------
636 wire ta_out2_mode0 = tacctl2[`TAOUT]; // Output
637 wire ta_out2_mode1 = equ2 ? 1'b1 : ta_out2; // Set
638 wire ta_out2_mode2 = equ2 ? ~ta_out2 : // Toggle/Reset
639 equ0 ? 1'b0 : ta_out2;
640 wire ta_out2_mode3 = equ2 ? 1'b1 : // Set/Reset
641 equ0 ? 1'b0 : ta_out2;
642 wire ta_out2_mode4 = equ2 ? ~ta_out2 : ta_out2; // Toggle
643 wire ta_out2_mode5 = equ2 ? 1'b0 : ta_out2; // Reset
644 wire ta_out2_mode6 = equ2 ? ~ta_out2 : // Toggle/Set
645 equ0 ? 1'b1 : ta_out2;
646 wire ta_out2_mode7 = equ2 ? 1'b0 : // Reset/Set
647 equ0 ? 1'b1 : ta_out2;
649 wire ta_out2_nxt = (tacctl2[`TAOUTMODx]==3'b000) ? ta_out2_mode0 :
650 (tacctl2[`TAOUTMODx]==3'b001) ? ta_out2_mode1 :
651 (tacctl2[`TAOUTMODx]==3'b010) ? ta_out2_mode2 :
652 (tacctl2[`TAOUTMODx]==3'b011) ? ta_out2_mode3 :
653 (tacctl2[`TAOUTMODx]==3'b100) ? ta_out2_mode4 :
654 (tacctl2[`TAOUTMODx]==3'b101) ? ta_out2_mode5 :
655 (tacctl2[`TAOUTMODx]==3'b110) ? ta_out2_mode6 :
658 always @ (posedge mclk or posedge puc)
659 if (puc) ta_out2 <= 1'b0;
660 else if ((tacctl2[`TAOUTMODx]==3'b001) & taclr) ta_out2 <= 1'b0;
661 else if (tar_clk) ta_out2 <= ta_out2_nxt;
663 assign ta_out2_en = ~tacctl2[`TACAP];
666 //============================================================================
667 // 9) Timer A interrupt generation
668 //============================================================================
671 assign taifg_set = tar_clk & (((tactl[`TAMCx]==2'b01) & (tar==taccr0)) |
672 ((tactl[`TAMCx]==2'b10) & (tar==16'hffff)) |
673 ((tactl[`TAMCx]==2'b11) & (tar_nxt==16'h0000) & tar_dec));
675 assign ccifg0_set = tacctl0[`TACAP] ? cci0_cap : (tar_clk & ((tactl[`TAMCx]!=2'b00) & equ0));
676 assign ccifg1_set = tacctl1[`TACAP] ? cci1_cap : (tar_clk & ((tactl[`TAMCx]!=2'b00) & equ1));
677 assign ccifg2_set = tacctl2[`TACAP] ? cci2_cap : (tar_clk & ((tactl[`TAMCx]!=2'b00) & equ2));
680 wire irq_ta0 = (tacctl0[`TACCIFG] & tacctl0[`TACCIE]);
682 wire irq_ta1 = (tactl[`TAIFG] & tactl[`TAIE]) |
683 (tacctl1[`TACCIFG] & tacctl1[`TACCIE]) |
684 (tacctl2[`TACCIFG] & tacctl2[`TACCIE]);
687 endmodule // omsp_timerA
689 `include "openMSP430_undefines.v"