1 ; -*- coding: utf-8 -*-
3 ; Fast Forth For Texas Instrument MSP430FR4133
5 ; Copyright (C) <2016> <J.M. THOORENS>
7 ; This program is free software: you can redistribute it and/or modify
8 ; it under the terms of the GNU General Public License as published by
9 ; the Free Software Foundation, either version 3 of the License, or
10 ; (at your option) any later version.
12 ; This program is distributed in the hope that it will be useful,
13 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ; GNU General Public License for more details.
17 ; You should have received a copy of the GNU General Public License
18 ; along with this program. If not, see <http://www.gnu.org/licenses/>.
20 ; ======================================================================
21 ; INIT MSP-EXP430FR4133 board
22 ; ======================================================================
25 ; http://www.ebay.fr/itm/CP2102-USB-UART-Board-mini-Data-Transfer-Convertor-Module-Development-Board-/251433941479
27 ; for sd card socket be carefull : pin CD must be present !
28 ; http://www.ebay.com/itm/2-PCS-SD-Card-Module-Slot-Socket-Reader-For-Arduino-MCU-/181211954262?pt=LH_DefaultDomain_0&hash=item2a3112fc56
31 ; J101 eZ-FET <-> target
32 ; -----------------------
34 ; P3 <-> P4 - TEST - TEST
35 ; P5 <-> P6 - RST - RST
36 ; P7 <-> P8 - TX1 - P1.0 UCA0 TXD ---> RX UARTtoUSB module
37 ; P9 <->P10 - RX1 - P1.1 UCA0 RXD <--- TX UARTtoUSB module
38 ; P11<->P12 - CTS - P2.4
39 ; P13<->P14 - RTS - P2.3
40 ; P15<->P16 - VCC - 3V3
42 ; P19<->P20 - GND - VSS
44 ; Launchpad Header Left J1
45 ; ------------------------
57 ; Launchpad Header Right J2
58 ; -------------------------
60 ; P2 - P1.7 TA0.1/TDO/A7
61 ; P3 - P1.6 TA0.2/TDI/TCLK/A6
64 ; P6 - P5.2 UCB0SIMO/UCB0SDA
65 ; P7 - P5.3 UCB0SOMI/UCB0SCL
66 ; P8 - P1.3 UCA0STE/A3
67 ; P9 - P1.4 MCLK/TCK/A4
68 ; P10- P1.5 TA0CLK/TMS/A5
121 ; ===================================================================================
122 ; in case of 3.3V powered by UARTtoUSB bridge, open J13 straps {RST,TST,V+,5V} BEFORE
123 ; then wire VCC and GND of bridge onto J13 connector
124 ; ===================================================================================
126 ; ---------------------------------------------------
127 ; MSP - MSP-EXP430FR4133 LAUNCHPAD <--> OUTPUT WORLD
128 ; ---------------------------------------------------
134 ; +-4k7-< DeepRST <-- GND
136 ; P1.0 - UCA0 TXD J101.8 --+-> RX UARTtoUSB bridge
137 ; P1.1 - UCA0 RXD J101.10 <---- TX UARTtoUSB bridge
138 ; P2.3 - RTS J101.14 ----> CTS UARTtoUSB bridge (if TERMINALCTSRTS option)
139 ; VCC - J101.16 <---- VCC (optional supply from UARTtoUSB bridge - WARNING ! 3.3V !)
140 ; GND - J101.20 <---> GND (optional supply from UARTtoUSB bridge)
142 ; P2.7 - J1.5 <---- OUT IR_Receiver (1 TSOP32236)
144 ; P4.1 - LFXI 32768Hz quartz
145 ; P4.2 - LFXO 32768Hz quartz
147 ; P5.2 - UCB0 SDA/SIMO J2.6 <---> SDA I2C Slave
148 ; P5.3 - UCB0 SCL/SOMI J2.7 <---- SCL I2C Slave
150 ; P5.1 - UCB0 CLK J1.7 ----> orange SD_CLK
151 ; P5.2 - UCB0 SDA/SIMO J2.6 ----> grey SD_SDI
152 ; P5.3 - UCB0 SCL/SOMI J2.7 <---- purple SD_SDO
153 ; P8.0 - J1.6 <---- violin SD_CD (Card Detect)
154 ; P8.1 - J1.2 ----> brown SD_CS (Card Select)
156 ; P8.2 - Soft I2C_Master J1.9 ----> SDA software I2C Master
157 ; P8.3 - Soft I2C_Master J1.10 <---> SCL software I2C Master
160 ; ----------------------------------------------------------------------
161 ; INIT order : WDT, GPIOs, FRAM, Clock, UARTs...
162 ; ----------------------------------------------------------------------
164 ; ----------------------------------------------------------------------
165 ; POWER ON RESET AND INITIALIZATION : LOCK PMM_LOCKLPM5
166 ; ----------------------------------------------------------------------
168 ; BIS #LOCKLPM5,&PM5CTL0 ; unlocked by WARM
170 ; ----------------------------------------------------------------------
171 ; POWER ON RESET AND INITIALIZATION : WATCHDOG TIMER A
172 ; ----------------------------------------------------------------------
175 MOV #WDTPW+WDTHOLD+WDTCNTCL,&WDTCTL ; stop WDT
177 ; ----------------------------------------------------------------------
178 ; POWER ON RESET AND INITIALIZATION : I/O
179 ; ----------------------------------------------------------------------
181 ; ----------------------------------------------------------------------
182 ; POWER ON RESET AND INITIALIZATION : PORT1/2
183 ; ----------------------------------------------------------------------
185 ; reset state : Px{DIR,REN,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; Px{IN,OUT,IES} = ?
190 ; P1.0 - TX0 --> JP1 --> red LED1 --> GND
194 TXD .equ 1 ; P1.0 = TXD + FORTH Deep_RST pin
196 TERM_BUS .equ 003h ; TX RX
203 .IFDEF TERMINAL4WIRES
205 ; RTS output is wired to the CTS input of UART2USB bridge
206 ; configure RTS as output high to disable RX TERM during start FORTH
208 HANDSHAKOUT .set P2OUT
211 RTS .set 8 ; P2.3 bit position
213 BIS #00800h,&PADIR ; all pins as input else RTS P2.3
214 BIS #-1,&PAREN ; all input pins with resistor
216 .IFDEF TERMINAL5WIRES
218 CTS .set 10h ; P2.4 bit position
220 MOV #0EFFFh,&PAOUT ; P2.3 (RTS) as output HIGH, P2.4 (CTS) I pull down, others I pull up,
224 MOV #-1,&PAOUT ; that acts as pull up resistor, and P2.3 (RTS) as output HIGH
226 .ENDIF ; TERMINAL5WIRES
230 ; PORTx default wanted state : pins as input with pullup resistor
232 MOV #-1,&PAOUT ; OUT1 for all pins
233 BIS #-1,&PAREN ; all pins with pullup resistors
235 .ENDIF ; TERMINAL4WIRES
237 ; ----------------------------------------------------------------------
238 ; POWER ON RESET AND INITIALIZATION : PORT3/4
239 ; ----------------------------------------------------------------------
241 ; reset state : Px{DIR,REN,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; Px{IN,OUT,IES} = ?
247 ; P4.1 - LFXI 32768Hz quartz
248 ; P4.2 - LFXO 32768Hz quartz
250 ; PORTx default wanted state : pins as input with pullup resistor
252 MOV #00100h,&PBDIR ; all pins as inputs else P4.0
253 MOV #0FEFFh,&PBOUT ; OUT1 for all pins else P4
254 BIS #0FEFFh,&PBREN ; pullup for all pins resistors else P4.0
256 ; ----------------------------------------------------------------------
257 ; POWER ON RESET AND INITIALIZATION : PORT5/6
258 ; ----------------------------------------------------------------------
260 ; reset state : Px{DIR,REN,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; Px{IN,OUT,IES} = ?
263 SD_SEL .equ PCSEL0 ; to configure UCB0
264 SD_REN .equ PCREN ; to configure pullup resistors
265 SD_BUS .equ 000Eh ; pins P5.1 as UCB0CLK, P5.2 as UCB0SIMO & P5.3 as UCB0SOMI
267 ; PORTx default wanted state : pins as input with pullup resistor
269 MOV #-1,&PCOUT ; all pins OUT1
270 BIS #-1,&PCREN ; all pins with pull resistors
272 ; ----------------------------------------------------------------------
273 ; POWER ON RESET AND INITIALIZATION : PORT7/8
274 ; ----------------------------------------------------------------------
276 SD_CS .equ 2 ; P8.1 as SD_CS
277 SD_CD .equ 1 ; P8.0 as SD_CD
282 ; reset state : Px{DIR,REN,SEL0,SEL1,SELC,IE,IFG,IV} = 0 ; Px{IN,OUT,IES} = ?
284 ; PORTx default wanted state : pins as input with pullup resistor
286 MOV #-1,&PDOUT ; all pins OUT1
287 BIS #-1,&PDREN ; all pins with pull resistors
289 ; ----------------------------------------------------------------------
291 ; ----------------------------------------------------------------------
294 MOV.B #0A5h, &FRCTL0_H ; enable FRCTL0 access
295 MOV.B #10h, &FRCTL0 ; 1 waitstate @ 16 MHz
296 MOV.B #01h, &FRCTL0_H ; disable FRCTL0 access
299 ; ----------------------------------------------------------------------
300 ; POWER ON RESET SYS config
301 ; ----------------------------------------------------------------------
303 ; BIC #1,&SYSCFG0 ; enable write program in FRAM
304 MOV #0A500h,&SYSCFG0 ; enable write MAIN and INFO
306 ; ----------------------------------------------------------------------
307 ; POWER ON RESET AND INITIALIZATION : CLOCK SYSTEM
308 ; ----------------------------------------------------------------------
310 ; CS code for EXP430FR4133
312 ; to measure REFO frequency, output ACLK on P8.1:
315 ; result : REFO = ? kHz
318 ; ===================================================================
319 ; need to adjust FLLN (and DCO) for each device of MSP430fr2xxx family ?
320 ; (no problem with MSP430FR5xxx families without FLL).
321 ; ===================================================================
323 ; .IF FREQUENCY = 0.5
325 ; MOV #0D6h,&CSCTL0 ; preset DCO = 0xD6 (measured value @ 0x180 ; to measure, type 0x180 @ U.)
327 ; MOV #0001h,&CSCTL1 ; Set 1MHZ DCORSEL,disable DCOFTRIM,Modulation
328 ;; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
329 ;; MOV #100Dh,&CSCTL2 ; Set FLLD=1 (DCOCLKCDIV=DCO/2),set FLLN=0Dh
330 ; ; fCOCLKDIV = 32768 x (13+1) = 0.459 MHz ; measured : MHz
331 ;; MOV #100Eh,&CSCTL2 ; Set FLLD=1 (DCOCLKCDIV=DCO/2),set FLLN=0Eh
332 ; ; fCOCLKDIV = 32768 x (14+1) = 0.491 MHz ; measured : MHz
333 ; MOV #100Fh,&CSCTL2 ; Set FLLD=1 (DCOCLKCDIV=DCO/2),set FLLN=0Fh
334 ; ; fCOCLKDIV = 32768 x (15+1) = 0.524 MHz ; measured : MHz
335 ;; =====================================
338 ; .ELSEIF FREQUENCY = 1
340 ; MOV #00B4h,&CSCTL0 ; preset DCO = 0xB4 (measured value @ 0x180 ; to measure, type HEX 0x180 ?)
342 ; MOV #0001h,&CSCTL1 ; Set 1MHZ DCORSEL,disable DCOFTRIM,Modulation
343 ;; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
344 ;; MOV #001Dh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1Dh
345 ; ; fCOCLKDIV = 32768 x (29+1) = 0.983 MHz ; measured : 0.989MHz
346 ; MOV #001Eh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1Eh
347 ; ; fCOCLKDIV = 32768 x (30+1) = 1.015 MHz ; measured : 1.013MHz
348 ;; MOV #001Fh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1Fh
349 ; ; fCOCLKDIV = 32768 x (31+1) = 1.049 MHz ; measured : 1.046MHz
350 ;; =====================================
353 ; .ELSEIF FREQUENCY = 2
355 ; MOV #00B4h,&CSCTL0 ; preset DCO = 0xB4 (measured value @ 0x180 ; to measure, type HEX 0x180 ?)
357 ; MOV #0003h,&CSCTL1 ; Set 2MHZ DCORSEL,disable DCOFTRIM,Modulation
358 ;; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
359 ;; MOV #003Bh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=3Bh
360 ; ; fCOCLKDIV = 32768 x (59+1) = 1.996 MHz ; measured : MHz
361 ; MOV #003Ch,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=3Ch
362 ; ; fCOCLKDIV = 32768 x (60+1) = 1.998 MHz ; measured : MHz
363 ;; MOV #003Dh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=3Dh
364 ; ; fCOCLKDIV = 32768 x (61+1) = 2.031 MHz ; measured : MHz
365 ;; =====================================
368 ; .ELSEIF FREQUENCY = 4
370 ; MOV #00D2h,&CSCTL0 ; preset DCO = 0xD2 (measured value @ 0x180)
372 ; MOV #0005h,&CSCTL1 ; Set 4MHZ DCORSEL,disable DCOFTRIM,Modulation
373 ;; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
374 ;; MOV #0078h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=78h
375 ; ; fCOCLKDIV = 32768 x (120+1) = 3.965 MHz ; measured : 3.96MHz
377 ; MOV #0079h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=79h
378 ; ; fCOCLKDIV = 32768 x (121+1) = 3.997 MHz ; measured : 3.99MHz
380 ;; MOV #007Ah,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=7Ah
381 ; ; fCOCLKDIV = 32768 x (122+1) = 4.030 MHz ; measured : 4.020MHz
382 ;; =====================================
385 ; .ELSEIF FREQUENCY = 8
387 ; MOV #00F2h,&CSCTL0 ; preset DCO = 0xF2 (measured value @ 0x180)
389 ; MOV #0007h,&CSCTL1 ; Set 8MHZ DCORSEL,disable DCOFTRIM,Modulation
390 ;; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
391 ;; MOV #00F2h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F2h
392 ; ; fCOCLKDIV = 32768 x (242+1) = 7.963 MHz ; measured : 7.943MHz
393 ;; MOV #00F3h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F3h
394 ; ; fCOCLKDIV = 32768 x (243+1) = 7.995 MHz ; measured : 7.976MHz
395 ; MOV #00F4h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F4h
396 ; ; fCOCLKDIV = 32768 x (244+1) = 8.028 MHz ; measured : 8.009MHz
398 ;; MOV #00F5h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F5h
399 ; ; fCOCLKDIV = 32768 x (245+1) = 8.061 MHz ; measured : 8.042MHz
400 ; ; works with cp2102 and pl2303TA
401 ;; =====================================
404 ; .ELSEIF FREQUENCY = 16
406 ; MOV #0129h,&CSCTL0 ; preset DCO = 0x129 (measured value @ 0x180)
408 ; MOV #000Bh,&CSCTL1 ; Set 16MHZ DCORSEL,disable DCOFTRIM,Modulation
409 ;; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
410 ;; MOV #01E6h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E6h
411 ; ; fCOCLKDIV = 32768 x 486+1) = 15.958 MHz ; measured : 15.92MHz
412 ;; MOV #01E7h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E7h
413 ; ; fCOCLKDIV = 32768 x 487+1) = 15.991 MHz ; measured : 15.95MHz
414 ;; MOV #01E8h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E8h
415 ; ; fCOCLKDIV = 32768 x 488+1) = 16.023 MHz ; measured : 15.99MHz
416 ; MOV #01E9h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E9h
417 ; ; fCOCLKDIV = 32768 x 489+1) = 16.056 MHz ; measured : 16.02MHz
418 ;; MOV #01EAh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E9h
419 ; ; fCOCLKDIV = 32768 x 490+1) = 16.089 MHz ; measured : 16.02MHz
420 ;; =====================================
424 ; .error "bad frequency setting, only 0.5,1,2,4,8,16 MHz"
428 ;; LFXIN : P4.1, LFXOUT : P4.2
429 ; MOV #0600h,&PBSEL0 ; SEL0 for only P4.1,P4.2
430 ;; MOV #0000h,&CSCTL3 ; FLL select XT1, FLLREFDIV=0 (default value)
431 ; MOV #0000h,&CSCTL4 ; ACLOCK select XT1, MCLK & SMCLK select DCOCLKDIV
433 ; MOV #0010h,&CSCTL3 ; FLL select REFCLOCK, FLLREFDIV=0
434 ;; MOV #0100h,&CSCTL4 ; ACLOCK select REFO, MCLK & SMCLK select DCOCLKDIV (default value)
437 ; BIS &SYSRSTIV,&SAVE_SYSRSTIV; store volatile SYSRSTIV preserving a pending request for DEEP_RST
438 ;; CMP #2,&SAVE_SYSRSTIV ; POWER ON ?
439 ;; JZ ClockWaitX ; yes
440 ;; .word 0759h ; no RRUM #2,X --> wait only 125 ms
441 ;ClockWaitX MOV #5209,Y ; wait 0.5s before starting after POR
442 ; ; ...because FLL lock time = 280 ms
443 ;ClockWaitY SUB #1,Y ;1
444 ; JNZ ClockWaitY ;2 5209x3 = 15625 cycles delay = 15.625ms @ 1MHz
445 ; SUB #1,X ; x 32 @ 1 MHZ = 500ms
446 ; JNZ ClockWaitX ; time to stabilize power source ( 500ms )
450 ; MOV #058h,&CSCTL0 ; preset DCO = measured value @ 0x180 (88)
451 ; MOV #0001h,&CSCTL1 ; Set 1MHZ DCORSEL,disable DCOFTRIM,Modulation
452 MOV #1ED1h,&CSCTL0 ; preset MOD=31, DCO = measured value @ 0x180 (209)
453 MOV #00B0h,&CSCTL1 ; Set 1MHZ DCORSEL,enable DCOFTRIM=3h ,enable Modulation to reduce EMI
454 ; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
455 ; MOV #100Dh,&CSCTL2 ; Set FLLD=1 (DCOCLKCDIV=DCO/2),set FLLN=0Dh
456 ; fCOCLKDIV = 32768 x (13+1) = 0.459 MHz ; measured : MHz
457 ; MOV #100Eh,&CSCTL2 ; Set FLLD=1 (DCOCLKCDIV=DCO/2),set FLLN=0Eh
458 ; fCOCLKDIV = 32768 x (14+1) = 0.491 MHz ; measured : MHz
459 MOV #100Fh,&CSCTL2 ; Set FLLD=1 (DCOCLKCDIV=DCO/2),set FLLN=0Fh
460 ; fCOCLKDIV = 32768 x (15+1) = 0.524 MHz ; measured : MHz
461 ; =====================================
464 .ELSEIF FREQUENCY = 1
466 ; MOV #100h,&CSCTL0 ; preset DCO = 256
467 ; MOV #00B1h,&CSCTL1 ; Set 1MHZ DCORSEL,enable DCOFTRIM=3h ,disable Modulation
468 MOV #1EFFh,&CSCTL0 ; preset MOD=31, DCO=255
469 MOV #00B0h,&CSCTL1 ; Set 1MHZ DCORSEL,enable DCOFTRIM=3h ,enable Modulation to reduce EMI
470 ; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
471 ; MOV #001Dh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1Dh
472 ; fCOCLKDIV = 32768 x (29+1) = 0.983 MHz ; measured : 0.989MHz
473 MOV #001Eh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1Eh
474 ; fCOCLKDIV = 32768 x (30+1) = 1.015 MHz ; measured : 1.013MHz
475 ; MOV #001Fh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1Fh
476 ; fCOCLKDIV = 32768 x (31+1) = 1.049 MHz ; measured : 1.046MHz
477 ; =====================================
480 .ELSEIF FREQUENCY = 2
482 ; MOV #100h,&CSCTL0 ; preset DCO = 256
483 ; MOV #00B3h,&CSCTL1 ; Set 2MHZ DCORSEL,enable DCOFTRIM=3h ,disable Modulation
484 MOV #1EFFh,&CSCTL0 ; preset MOD=31, DCO=255
485 MOV #00B2h,&CSCTL1 ; Set 2MHZ DCORSEL,enable DCOFTRIM=3h ,enable Modulation to reduce EMI
486 ; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
487 ; MOV #003Bh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=3Bh
488 ; fCOCLKDIV = 32768 x (59+1) = 1.996 MHz ; measured : MHz
489 MOV #003Ch,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=3Ch
490 ; fCOCLKDIV = 32768 x (60+1) = 1.998 MHz ; measured : MHz
491 ; MOV #003Dh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=3Dh
492 ; fCOCLKDIV = 32768 x (61+1) = 2.031 MHz ; measured : MHz
493 ; =====================================
496 .ELSEIF FREQUENCY = 4
498 ; MOV #100h,&CSCTL0 ; preset DCO = 256
499 ; MOV #00B5h,&CSCTL1 ; Set 4MHZ DCORSEL,enable DCOFTRIM=3h ,disable Modulation
500 MOV #1EFFh,&CSCTL0 ; preset MOD=31, DCO=255
501 MOV #00B4h,&CSCTL1 ; Set 4MHZ DCORSEL,enable DCOFTRIM=3h ,enable Modulation to reduce EMI
502 ; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
503 ; MOV #0078h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=78h
504 ; fCOCLKDIV = 32768 x (120+1) = 3.965 MHz ; measured : 3.96MHz
506 MOV #0079h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=79h
507 ; fCOCLKDIV = 32768 x (121+1) = 3.997 MHz ; measured : 3.99MHz
509 ; MOV #007Ah,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=7Ah
510 ; fCOCLKDIV = 32768 x (122+1) = 4.030 MHz ; measured : 4.020MHz
511 ; =====================================
514 .ELSEIF FREQUENCY = 8
516 ; MOV #100h,&CSCTL0 ; preset DCO = 256
517 ; MOV #00B7h,&CSCTL1 ; Set 8MHZ DCORSEL,enable DCOFTRIM=3h ,disable Modulation
518 MOV #1EFFh,&CSCTL0 ; preset MOD=31, DCO=255
519 MOV #00B6h,&CSCTL1 ; Set 8MHZ DCORSEL,enable DCOFTRIM=3h ,enable Modulation to reduce EMI
520 ; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
521 ; MOV #00F2h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F2h
522 ; fCOCLKDIV = 32768 x (242+1) = 7.963 MHz ; measured : 7.943MHz
523 ; MOV #00F3h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F3h
524 ; fCOCLKDIV = 32768 x (243+1) = 7.995 MHz ; measured : 7.976MHz
525 MOV #00F4h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F4h
526 ; fCOCLKDIV = 32768 x (244+1) = 8.028 MHz ; measured : 8.009MHz
528 ; MOV #00F5h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=F5h
529 ; fCOCLKDIV = 32768 x (245+1) = 8.061 MHz ; measured : 8.042MHz
531 ; MOV #00F8h,&CSCTL2 ; don't work with cp2102 (by low value)
532 ; MOV #00FAh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=FAh
534 ; =====================================
537 .ELSEIF FREQUENCY = 12
539 ; MOV #100h,&CSCTL0 ; preset DCO = 256
540 ; MOV #00B9h,&CSCTL1 ; Set 12MHZ DCORSEL,enable DCOFTRIM=3h ,disable Modulation
541 MOV #1EFFh,&CSCTL0 ; preset MOD=31, DCO=255
542 MOV #00B8h,&CSCTL1 ; Set 12MHZ DCORSEL,enable DCOFTRIM=3h ,enable Modulation to reduce EMI
543 ; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
544 ; MOV #016Ch,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E6h
545 ; fCOCLKDIV = 32768 x 364+1) = 12.960 MHz ; measured : 11.xxxMHz
546 ; MOV #016Dh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E7h
547 ; fCOCLKDIV = 32768 x 365+1) = 11.993 MHz ; measured : 11.xxxMHz
548 MOV #016Eh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E8h
549 ; fCOCLKDIV = 32768 x 366+1) = 12.025 MHz ; measured : 12.xxxMHz
550 ; MOV #016Fh,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E9h
551 ; fCOCLKDIV = 32768 x 367+1) = 12.058 MHz ; measured : 12.xxxMHz
552 ; =====================================
555 .ELSEIF FREQUENCY = 16
557 ; MOV #100h,&CSCTL0 ; preset DCO = 256
558 ; MOV #00BBh,&CSCTL1 ; Set 16MHZ DCORSEL,enable DCOFTRIM=3h ,disable Modulation
559 MOV #1EFFh,&CSCTL0 ; preset MOD=31, DCO=255
560 MOV #00BAh,&CSCTL1 ; Set 16MHZ DCORSEL,enable DCOFTRIM=3h ,enable Modulation to reduce EMI
561 ; ===================================== ; fCOCLKDIV = REFO x (FLLN+1)
562 ; MOV #01E6h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E6h
563 ; fCOCLKDIV = 32768 x 486+1) = 15.958 MHz ; measured : 15.92MHz
564 ; MOV #01E7h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E7h
565 ; fCOCLKDIV = 32768 x 487+1) = 15.991 MHz ; measured : 15.95MHz
566 MOV #01E8h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E8h
567 ; fCOCLKDIV = 32768 x 488+1) = 16.023 MHz ; measured : 15.99MHz
568 ; MOV #01E9h,&CSCTL2 ; Set FLLD=0 (DCOCLKCDIV=DCO),set FLLN=1E9h
569 ; fCOCLKDIV = 32768 x 489+1) = 16.056 MHz ; measured : 16.02MHz
570 ; =====================================
574 .error "bad frequency setting, only 0.5,1,2,4,8,12,16 MHz"
578 ; MOV #0000h,&CSCTL3 ; FLL select XT1, FLLREFDIV=0 (default value)
579 MOV #0000h,&CSCTL4 ; ACLOCK select XT1, MCLK & SMCLK select DCOCLKDIV
581 BIS #0010h,&CSCTL3 ; FLL select REFCLOCK
582 ; MOV #0100h,&CSCTL4 ; ACLOCK select REFO, MCLK & SMCLK select DCOCLKDIV (default value)
585 BIS &SYSRSTIV,&SAVE_SYSRSTIV; store volatile SYSRSTIV preserving a pending request for DEEP_RST
586 CMP #2,&SAVE_SYSRSTIV ; POWER ON ?
588 .word 0749h ; no RRUM #1,X --> wait anyway 250 ms because FLL lock time = 200 ms
589 ClockWaitX MOV #5209,Y ; wait 0.5s before starting after POR
591 ClockWaitY SUB #1,Y ;1
592 JNZ ClockWaitY ;2 5209x3 = 15625 cycles delay = 15.625ms @ 1MHz
593 SUB #1,X ; x 32 @ 1 MHZ = 500ms
594 JNZ ClockWaitX ; time to stabilize power source ( 500ms )
596 ;WAITFLL BIT #300h,&CSCTL7 ; wait FLL lock