1 ; -----------------------------------
3 ; -----------------------------------
6 \ MSP_EXP430FR5739 MSP_EXP430FR5969 MSP_EXP430FR5994 MSP_EXP430FR6989
7 \ MSP_EXP430FR4133 CHIPSTICK_FR2433
9 \ MY_MSP430FR5738_1 MY_MSP430FR5738 MY_MSP430FR5948 MY_MSP430FR5948_1
13 \ Copyright (C) <2016> <J.M. THOORENS>
15 \ This program is free software: you can redistribute it and/or modify
16 \ it under the terms of the GNU General Public License as published by
17 \ the Free Software Foundation, either version 3 of the License, or
18 \ (at your option) any later version.
20 \ This program is distributed in the hope that it will be useful,
21 \ but WITHOUT ANY WARRANTY\ without even the implied warranty of
22 \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 \ GNU General Public License for more details.
25 \ You should have received a copy of the GNU General Public License
26 \ along with this program. If not, see <http://www.gnu.org/licenses/>.
29 \ ===========================================================================
30 \ remember: for good downloading to target, all lines must be ended with CR+LF !
31 \ ===========================================================================
35 \ R4 to R7 must be saved before use and restored after
36 \ scratch registers Y to S are free for use
37 \ under interrupt, IP is free for use
38 \ interrupts reset SR register !
40 \ PUSHM order : PSP,TOS, IP, S, T, W, X, Y, R7, R6, R5, R4, R3, R2,RSP, PC
41 \ example : PUSHM IP,Y
43 \ POPM order : PC ,RSP, R2, R3, R4, R5, R6, R7, Y, X, W, T, S, IP,TOS,PSP
46 \ ASSEMBLER conditionnal usage after IF UNTIL WHILE : S< S>= U< U>= 0= 0<> 0>=
47 \ ASSEMBLER conditionnal usage before ?JMP ?GOTO : S< S>= U< U>= 0= 0<> 0<
49 \ FORTH conditionnal : 0= 0< = < > U<
51 \ display on a LCD 2x20 CHAR the code sent by an IR remote under philips RC5 protocol
52 \ target : any TI MSP-EXP430FRxxxx launchpad (FRAM)
53 \ LPM_MODE = LPM0 because use SMCLK for LCDVo
55 \ DEMO : driver for IR remote compatible with the PHILIPS RC5 protocol
56 \ plus : driver for 5V LCD 2x20 characters display with 4 bits data interface
57 \ without usage of an auxiliary 5V to feed the LCD_Vo
58 \ and without potentiometer to adjust the LCD contrast :
59 \ to adjust LCD contrast, just press S1 (-) or S2 (+)
60 \ LCDVo current consumption ~ 500 uA.
62 \ ===================================================================================
63 \ notice : adjust TA0EX0,TB0CTL,TB0EX0 and 20_us to the target frequency if <> 8MHz !
64 \ ===================================================================================
67 \ layout : I/O are defined in the launchpad.pat file (don't work with ChipStick_FR2433)
69 \ GND <-------+---0V0----------> 1 LCD_Vss
70 \ VCC >------ | --3V6-----+----> 2 LCD_Vdd
77 \ TB0.2 >---||--+--^/\/\/v--+----> 3 LCD_Vo (= 0V6 without modulation)
78 \ -------------------------> 4 LCD_RW
79 \ -------------------------> 5 LCD_RW
80 \ -------------------------> 6 LCD_EN
81 \ <------------------------> 11 LCD_DB4
82 \ <------------------------> 12 LCD_DB5
83 \ <------------------------> 13 LCD_DB5
84 \ <------------------------> 14 LCD_DB7
86 \ <----- LCD contrast + <--- Sw1 <--- (finger) :-)
87 \ <----- LCD contrast - <--- Sw2 <--- (finger) :-)
89 \ rc5 <--- OUT IR_Receiver (1 TSOP32236)
91 [DEFINED] {RC5TOLCD} [IF] {RC5TOLCD} [THEN] \ remove application
93 [DEFINED] ASM [IF] \ security test
97 [UNDEFINED] MAX [IF] \ MAX and MIN are defined in {ANS_COMP}
99 CODE MAX \ n1 n2 -- n3 signed maximum
107 CODE MIN \ n1 n2 -- n3 signed minimum
117 [UNDEFINED] U.R [IF] \ defined in {UTILITY}
118 : U.R \ u n -- display u unsigned in n width (n >= 2)
120 R> OVER - 0 MAX SPACES TYPE
125 \ CODE 20_US \ n -- n * 20 us
126 \ BEGIN \ 3 cycles loop + 6~
127 \ \ MOV #5,W \ 3 MCLK = 1 MHz
128 \ \ MOV #23,W \ 3 MCLK = 4 MHz
129 \ \ MOV #51,W \ 3 MCLK = 8 MHz
130 \ MOV #104,W \ 3 MCLK = 16 MHz
131 \ \ MOV #158,W \ 3 MCLK = 24 MHz
132 \ BEGIN \ 3 cycles loop ==> 3 * W / F us = 100 us - 1 @ 8 MHz
142 CODE 20_US \ n -- n * 20 us
143 BEGIN \ here we presume that TB0IFG = 1...
146 0<> UNTIL \ 2 loop until TB0IFG set
147 BIC #1,&TB0CTL \ 3 clear TB0IFG
149 U< UNTIL \ 2 ...so add a dummy loop with U< instead of 0=
155 CODE TOP_LCD \ LCD Sample
156 \ \ if write : %xxxxWWWW --
157 \ \ if read : -- %0000RRRR
158 BIS.B #LCD_EN,&LCD_CMD_OUT \ lcd_en 0-->1
159 BIT.B #LCD_RW,&LCD_CMD_IN \ lcd_rw test
160 0= IF \ write LCD bits pattern
162 MOV.B TOS,&LCD_DB_OUT \ send LCD_Data
163 BIC.B #LCD_EN,&LCD_CMD_OUT \ lcd_en 1-->0 ==> strobe data
166 THEN \ read LCD bits pattern
169 BIC.B #LCD_EN,&LCD_CMD_OUT \ lcd_en 1-->0 ==> strobe data
170 MOV.B &LCD_DB_IN,TOS \ get LCD_Data
176 CODE LCD_W \ byte -- write byte to LCD
178 MOV TOS,0(PSP) \ -- %xxxxLLLL %HHHHLLLL
179 RRUM #4,TOS \ -- %xxxxLLLL %xxxxHHHH
180 BIC.B #LCD_RW,&LCD_CMD_OUT \ lcd_rw=0
181 BIS.B #LCD_DB,&LCD_DB_DIR \ LCD_Data as output
182 COLON \ high level word starts here
183 TOP_LCD 2 20_US \ write high nibble first
188 CODE LCD_WrC \ char -- Write Char
189 BIS.B #LCD_RS,&LCD_CMD_OUT \ lcd_rs=1
194 CODE LCD_WrF \ func -- Write Fonction
195 BIC.B #LCD_RS,&LCD_CMD_OUT \ lcd_rs=0
201 $01 LCD_WrF 100 20_us \ $01 LCD_WrF 80 20_us ==> bad init !
206 $02 LCD_WrF 100 20_us
210 : LCD_Entry_set $04 OR LCD_WrF ;
212 : LCD_DSP_Ctrl $08 OR LCD_WrF ;
214 : LCD_DSP_Shift $10 OR LCD_WrF ;
216 : LCD_Fn_Set $20 OR LCD_WrF ;
218 : LCD_CGRAM_Set $40 OR LCD_WrF ;
220 : LCD_Goto $80 OR LCD_WrF ;
222 CODE LCD_R \ -- byte read byte from LCD
223 BIC.B #LCD_DB,&LCD_DB_DIR \ LCD_Data as intput
224 BIS.B #LCD_RW,&LCD_CMD_OUT \ lcd_rw=1
225 COLON \ starts a FORTH word
226 TOP_LCD 2 20_us \ -- %0000HHHH
227 TOP_LCD 2 20_us \ -- %0000HHHH %0000LLLL
228 HI2LO \ switch from FORTH to assembler
229 RLAM #4,0(PSP) \ -- %HHHH0000 %0000LLLL
230 ADD.B @PSP+,TOS \ -- %HHHHLLLL
231 MOV @RSP+,IP \ restore IP saved by COLON
236 CODE LCD_RdS \ -- status Read Status
237 BIC.B #LCD_RS,&LCD_CMD_OUT \ lcd_rs=0
242 CODE LCD_RdC \ -- char Read Char
243 BIS.B #LCD_RS,&LCD_CMD_OUT \ lcd_rs=1
249 \ ******************************\
250 ASM WDT_INT \ Watchdog interrupt routine, warning : not FORTH executable !
251 \ ******************************\
252 \ XOR.B #LED1,&LED1_OUT \ to visualise WDT
253 BIT.B #SW2,&SW2_IN \ test switch S2
254 0= IF \ case of switch S2 pressed
255 CMP #19,&TB0CCR2 \ maxi Ton = 19/20 & VDD=3V6 ==> LCD_Vo = -1V4
257 ADD #1,&TB0CCR2 \ action for switch S2 (P2.5) : 150 mV / increment
260 BIT.B #SW1,&SW1_IN \ test switch S1 input
261 0= IF \ case of Switch S1 pressed
262 CMP #3,&TB0CCR2 \ mini Ton = 3/20 & VDD=3V6 ==> LCD_Vo = 0V
264 SUB #1,&TB0CCR2 \ action for switch S1 (P2.6) : -150 mV / decrement
268 BW1 \ from quit on truncated RC5 message
269 BW2 \ from repeated RC5 command
270 BW3 \ from end of RC5_INT
271 BIC #$78,0(RSP) \4 SCG0,OSCOFF,CPUOFF and GIE are OFF in retiSR to force LPM0_LOOP despite pending interrupt
276 \ ******************************\
277 ASM RC5_INT \ wake up on Px.RC5 change interrupt
278 \ ******************************\
279 \ IR_RC5 driver \ IP,S,T,W,X,Y registers are free for use
280 \ ******************************\
281 \ \ in : SR(9)=old Toggle bit memory (ADD on)
282 \ \ SMclock = 8|16|24 MHz
283 \ \ use : T,W,X,Y, TA1 timer, TA1R register
284 \ \ out : X = 0 C6 C5 C4 C3 C2 C1 C0
285 \ \ SR(9)=new Toggle bit memory (ADD on)
286 \ ******************************\
287 \ RC5_FirstStartBitHalfCycle: \
288 \ ******************************\ division in TA1CTL (SMCLK/1|SMCLK/1|SMCLK/2|SMCLK/4|SMCLK/8)
289 \ MOV #0,&TA1EX0 \ predivide by 1 in TA1EX0 register ( 125kHz| 1MHz | 2MHZ | 4MHZ | 8MHZ ), reset value
290 MOV #1,&TA1EX0 \ predivide by 2 in TA1EX0 register ( 250kHZ| 2MHz | 4MHZ | 8MHZ | 16MHZ )
291 \ MOV #2,&TA1EX0 \ predivide by 3 in TA1EX0 register ( 375kHz| 3MHz | 6MHZ | 12MHZ | 24MHZ )
292 \ MOV #3,&TA1EX0 \ predivide by 4 in TA1EX0 register ( 500kHZ| 4MHz | 8MHZ | 16MHZ )
293 \ MOV #4,&TA1EX0 \ predivide by 6 in TA1EX0 register ( 625kHz| 5MHz | 10MHZ | 20MHZ )
294 \ MOV #5,&TA1EX0 \ predivide by 6 in TA1EX0 register ( 750kHz| 6MHz | 12MHZ | 24MHZ )
295 \ MOV #6,&TA1EX0 \ predivide by 7 in TA1EX0 register ( 875kHz| 7MHz | 14MHZ | 28MHZ )
296 \ MOV #7,&TA1EX0 \ predivide by 8 in TA1EX0 register ( 1MHz | 8MHz | 16MHZ | 32MHZ )
297 MOV #1778,X \ RC5_Period * 1us
298 \ MOV #222,X \ RC5_Period * 8us (SMCLK/1 and first column above)
299 MOV #14,W \ count of loop
301 \ ******************************\
302 \ RC5_HalfCycle \ <--- loop back ---+ with readjusted RC5_Period
303 \ ******************************\ |
304 \ MOV #%1000100100,&TA1CTL \ (re)start timer_A | SMCLK/1 time interval,free running,clear TA1_IFG and TA1R
305 \ MOV #%1002100100,&TA1CTL \ (re)start timer_A | SMCLK/2 time interval,free running,clear TA1_IFG and TA1R
306 \ MOV #%1010100100,&TA1CTL \ (re)start timer_A | SMCLK/4 time interval,free running,clear TA1_IFG and TA1R
307 MOV #%1011100100,&TA1CTL \ (re)start timer_A | SMCLK/8 time interval,free running,clear TA1_IFG and TA1R
308 \ RC5_Compute_3/4_Period: \ |
309 RRUM #1,X \ X=1/2 cycle |
312 ADD X,Y \ Y=3/4 cycle
313 BEGIN CMP Y,&TA1R \3 wait 1/2 + 3/4 cycle = n+1/4 cycles
315 \ ******************************\
316 \ RC5_SampleOnFirstQuarter \ at n+1/4 cycles, we sample RC5_input, ST2/C6 bit first
317 \ ******************************\
318 BIT.B #RC5,&IR_IN \ C_flag = IR bit
319 ADDC T,T \ C_flag <-- T(15):T(0) <-- C_flag
320 MOV.B &IR_IN,&IR_IES \ preset Px_IES.y state for next IFG
321 BIC.B #RC5,&IR_IFG \ clear Px_IFG.y after 4/4 cycle pin change
322 SUB #1,W \ decrement count loop
323 \ \ count = 13 ==> T = x x x x x x x x |x x x x x x x /C6
324 \ \ count = 0 ==> T = x x /C6 Tg A4 A3 A2 A1|A0 C5 C4 C3 C2 C1 C0 1
325 0<> WHILE \ ----> out of loop ----+
326 ADD X,Y \ | Y = n+3/4 cycles = time out because n+1/2 cycles edge is always present
328 MOV &TA1R,X \3 | X grows from n+1/4 up to n+3/4 cycles
329 CMP Y,X \1 | cycle time out of bound ?
331 BIC #$30,&TA1CTL \ | | stop timer
332 GOTO BW1 \ | | quit on truncated RC5 message
334 BIT.B #RC5,&IR_IFG \3 | | n+1/2 cycles edge is always present
336 REPEAT \ ----> loop back --+ | with X = new RC5_period value
337 \ ******************************\ |
338 \ RC5_SampleEndOf: \ <---------------------+
339 \ ******************************\
340 BIC #$30,&TA1CTL \ stop timer
341 \ ******************************\
342 \ RC5_ComputeNewRC5word \
343 \ ******************************\
344 RLAM #1,T \ T = x /C6 Tg A4 A3 A2 A1 A0|C5 C4 C3 C2 C1 C0 1 0
345 MOV.B T,X \ X = C5 C4 C3 C2 C1 C0 1 0
346 RRUM #2,X \ X = 0 0 C5 C4 C3 C2 C1 C0
347 \ ******************************\
349 \ ******************************\
350 BIT #BIT14,T \ test /C6 bit in T
351 0= IF BIS #BIT6,X \ set C6 bit in X
352 THEN \ X = 0 C6 C5 C4 C3 C2 C1 C0
353 \ ******************************\
354 \ RC5_CommandByteIsDone \ -- BASE RC5_code
355 \ ******************************\
356 \ Only New_RC5_Command ADD_ON \ use SR(9) bit as toggle bit
357 \ ******************************\
358 RRUM #3,T \ new toggle bit = T(13) ==> T(10)
359 XOR @RSP,T \ (new XOR old) Toggle bits
360 BIT #UF10,T \ repeated RC5_command ?
361 0= ?GOTO BW2 \ yes, RETI without UF10 change and without action !
362 XOR #UF10,0(RSP) \ 5 toggle bit memory
363 \ ******************************\
364 \ Display IR_RC5 code \ X = RC5 code
365 \ ******************************\
367 MOV &BASE,2(PSP) \ save current base
368 MOV #$10,&BASE \ set hex base
369 MOV TOS,0(PSP) \ save TOS
371 LO2HI \ switch from assembler to FORTH
372 ['] LCD_CLEAR IS CR \ redirects CR
373 ['] LCD_WrC IS EMIT \ redirects EMIT
374 CR ." $" 2 U.R \ print IR_RC5 code
375 ['] (CR) IS CR \ restore CR
376 ['] (EMIT) IS EMIT \ restore EMIT
377 HI2LO \ switch from FORTH to assembler
378 MOV TOS,&BASE \ restore current BASE
380 \ ******************************\
382 \ ******************************\
386 \ ------------------------------\
388 \ ------------------------------\
389 \ ... \ insert here your background task
392 MOV #(SLEEP),PC \ Must be the last statement of BACKGROUND
394 \ ------------------------------\
398 \ ------------------------------\
399 \ TB0CTL = %0000 0010 1001 0100\$3C0
400 \ - - \CNTL Counter lentgh \ 00 = 16 bits
401 \ -- \TBSSEL TimerB clock select \ 10 = SMCLK
402 \ -- \ID input divider \ 10 = /4
403 \ -- \MC Mode Control \ 01 = up to TB0CCR0
404 \ - \TBCLR TimerB Clear
407 \ -------------------------------\
408 \ TB0CCTLx = %0000 0000 0110 0000\$3C{2,4,6,8,A,C,E}
409 \ -- \CM Capture Mode
414 \ --- \OUTMOD \ 011 = set/reset
420 \ -------------------------------\
422 \ -------------------------------\
424 \ ------------------------------\
425 \ set TB0 to make 50kHz PWM \ for LCD_Vo, works without interrupt
426 \ ------------------------------\
427 \ MOV #%1000010100,&TB0CTL \ SMCLK/1, up mode, clear timer, no int
428 \ MOV #0,&TB0EX0 \ predivide by 1 in TB0EX0 register (1 MHZ)
429 \ ------------------------------\
430 \ MOV #%1001010100,&TB0CTL \ SMCLK/2, up mode, clear timer, no int
431 \ MOV #1,&TB0EX0 \ predivide by 2 in TB0EX0 register (2 MHZ)
432 \ ------------------------------\
433 \ MOV #%1010010100,&TB0CTL \ SMCLK/4, up mode, clear timer, no int
434 \ MOV #1,&TB0EX0 \ predivide by 2 in TB0EX0 register (4 MHZ)
435 \ ------------------------------\
436 \ MOV #%1011010100,&TB0CTL \ SMCLK/8, up mode, clear timer, no int
437 \ MOV #0,&TB0EX0 \ predivide by 1 in TB0EX0 register (8 MHZ)
438 \ ------------------------------\
439 MOV #%1011010100,&TB0CTL \ SMCLK/8, up mode, clear timer, no int
440 MOV #1,&TB0EX0 \ predivide by 2 in TB0EX0 register (16 MHZ)
441 \ ------------------------------\
442 \ MOV #%1011010100,&TB0CTL \ SMCLK/8, up mode, clear timer, no int
443 \ MOV #2,&TB0EX0 \ predivide by 3 in TB0EX0 register (24 MHZ)
444 \ ------------------------------\
445 MOV #19,&TB0CCR0 \ 19+1=20*1us=20us
446 \ ------------------------------\
447 \ set TB0.2 to generate PWM for LCD_Vo
448 \ ------------------------------\
449 MOV #%01100000,&TB0CCTL2 \ output mode = set/reset \ clear CCIFG
450 MOV #10,&TB0CCR2 \ contrast adjust : 10/20 ==> LCD_Vo = -0V6|+3V6 (Vcc=3V6)
451 \ MOV #12,&TB0CCR2 \ contrast adjust : 12/20 ==> LCD_Vo = -1V4|+3V3 (Vcc=3V3)
452 \ ------------------------------\
453 BIS.B #LCDVo,&LCDVo_DIR \
454 BIS.B #LCDVo,&LCDVo_SEL \ SEL.2 TB0.2
455 \ ------------------------------\
456 BIS.B #LCD_CMD,&LCD_CMD_DIR \ lcd_cmd as outputs
457 BIC.B #LCD_CMD,&LCD_CMD_REN \ lcd_cmd pullup/down disable
458 \ ------------------------------\
459 BIS.B #LCD_DB,&LCD_DB_DIR \ as output, wired to DB(4-7) LCD_Data
460 BIC.B #LCD_DB,&LCD_DB_REN \ LCD_Data pullup/down disable
461 \ ******************************\
463 \ ******************************\
464 BIS.B #RC5,&IR_IE \ enable RC5_Int
465 BIC.B #RC5,&IR_IFG \ reset RC5_Int flag
466 MOV #RC5_INT,&IR_Vec \ init interrupt vector
467 \ ******************************\
468 \ init WatchDog TA0 \ eUSCI_A0 (FORTH terminal) has higher priority than TA0
469 \ ******************************\
470 \ %01 0001 0100 \ TAxCTL
471 \ -- \ TASSEL CLK = ACLK = LFXT = 32768 Hz
472 \ -- \ ID divided by 1
473 \ -- \ MC MODE = up to TAxCCRn
474 \ - \ TACLR clear timer count
477 \ ------------------------------\
478 MOV #%0100010100,&TA0CTL \ start TA0, ACLK, up mode, disable int,
479 \ ------------------------------\
481 \ --- \ TAIDEX pre divisor
482 \ ------------------------------\
483 \ %0000 0000 0000 0101 \ TAxCCR0
484 MOV ##1638,&TA0CCR0 \ init WDT for LFXT: 32768/20=1638 ==> 50ms
485 \ MOV ##400,&TA0CCR0 \ init WDT for VLO: 8000/20=400 ==> 50ms
486 \ ------------------------------\
487 \ %0000 0000 0001 0000 \ TAxCCTL0
488 \ - \ CAP capture/compare mode = compare
491 MOV #%10000,&TA0CCTL0 \ enable compare interrupt, clear CCIFG0
492 \ ------------------------------\
493 MOV #WDT_INT,&TA0_0_Vec \ for only CCIFG0 int, this interrupt clears automatically CCIFG0
494 \ ------------------------------\
495 \ define LPM mode for ACCEPT \
496 \ ------------------------------\
497 \ MOV #LPM4,&LPM_MODE \ with MSP430FR59xx
498 \ MOV #LPM2,&LPM_MODE \ with MSP430FR57xx, terminal input don't work for LPMx > 2
499 \ \ with MSP430FR2xxx, terminal input don't work for LPMx > 0 ; LPM0 is the default value
501 \ ------------------------------\
502 \ redirects to background task \
503 \ ------------------------------\
505 MOV #BACKGROUND,2(X) \
506 \ ------------------------------\
508 LO2HI \ no need to push IP because (WARM) resets the Return Stack !
510 \ ------------------------------\
512 \ ------------------------------\
513 $03E8 20_US \ 1- wait 20 ms
514 $03 TOP_LCD \ 2- send DB5=DB4=1
515 $CD 20_US \ 3- wait 4,1 ms
516 $03 TOP_LCD \ 4- send again DB5=DB4=1
517 $5 20_US \ 5- wait 0,1 ms
518 $03 TOP_LCD \ 6- send again again DB5=DB4=1
519 $2 20_US \ wait 40 us = LCD cycle
520 $02 TOP_LCD \ 7- send DB5=1 DB4=0
521 $2 20_US \ wait 40 us = LCD cycle
522 $28 LCD_WRF \ 8- %001DNFxx "FonctionSet" D=8/4 DataBus width, Number of lines=2/1, Font bold/normal
523 $08 LCD_WRF \ 9- %1DCB "DisplayControl" : Display off, Cursor off, Blink off.
524 LCD_Clear \ 10- "LCD_Clear"
525 $06 LCD_WRF \ 11- %01xx "LCD_EntrySet" : address and cursor shift after writing in RAM
526 $0C LCD_WRF \ 12- %1DCB "DisplayControl" : Display on, Cursor off, Blink off.
527 LCD_Clear \ 10- "LCD_Clear"
528 ['] LCD_HOME IS CR \ ' CR redirected to LCD_HOME
529 ['] LCD_WRC IS EMIT \ ' EMIT redirected to LCD_WrC
531 ['] (CR) IS CR \ ' (CR) is CR
532 ['] (EMIT) IS EMIT \ ' (EMIT) is EMIT
533 \ NOECHO \ uncomment to run this app without terminal connexion
535 ." RC5toLCD is running. Type STOP to quit"
536 LIT RECURSE IS WARM \ insert this START routine between WARM and (WARM)...
537 (WARM) \ ...and continue with (WARM), must be the START last statement.
541 CODE STOP \ stops multitasking, must to be used before downloading app
543 MOV #(SLEEP),2(X) \ restore the default background
545 ['] (WARM) IS WARM \ remove START app from FORTH init process
546 ECHO COLD \ reset CPU, interrupt vectors, and start FORTH
551 ; downloading RC5toLCD.4th is done
552 RST_HERE ; this app is protected against <reset>