simpleavr 399 Posted December 8, 2013 Share Posted December 8, 2013 This is my entry to the POTM Nov-Dec 2013. Minimalist's Clock? Multi-mode Clock? Matrix Clock? M-Clock Description to follow... Gyula84, cubeberg, Rei Vilo and 1 other 4 Quote Link to post Share on other sites
simpleavr 399 Posted December 8, 2013 Author Share Posted December 8, 2013 Minimalist Multi-mode Matrix Clock Description This is a multi-mode clock project based on the msp430g2432. It can be assembled with minimal parts. With limited 8x8 pixels display resolution, this 12 hour clock shows time in 6 different modes. This project is based on a older attiny 2313 project I did a few years ago. HHMM mode, typical hours plus minutes scrolling digits with colon separator. Seconds mode, shows only seconds. Tix mode (shown below), led matrix is divided into quadrant, the upper quadrants shows the hour in bcd (binary coded decimal) values. they are represented by the number of dots to indicate the digits. the lower quadrants show the minute in bcd. i.e. for 5:34 it shows no dot + 5 dots on the upper half and 3 dots + 4 dots on the lower half. Dice mode (shown below), the led matrix is divided into two set of 'dices'. with the upper pair showing hour from 1 - 12, the lower pair of dice shows minutes in 5 minute increments. i.e. for 5:35 it shows dice value upper 5 + lower 7 (5 hour, 7 x 5 min). Binary (really it's bcd, or binary coded decimal) mode, (shown below) the hour, minute and second digits are show as binary dot on different columns in the led matrix. the columns 0 and 1 (from left) represents the hour digits, column 2 is blanked, columns 3 and 4 represent the minute digits, colum 5 is blanked, columns 6 and 7 represents the second digits. The circuit employs row and column multiplexing to drive the leds, one row at a time, this gives a 12.5% duty cycle when "sets" of leds (8 of them in each of the 8 rows) are turn on briefly. current limiting resistors are eliminated to save breadboard estate and as we are not constantly driving individual leds, they are not going to be damaged. The control (user interface) is also arranged so that we only use one tactile button for input. the firmware capture long button presses (press and hold) for menu rotation and normal button presses for menu selection. By migrating this project from an AVR mcu to a msp430 mcu I had made it possible to keep time a lot more accurately. During display (i.e. led on) the project runs at 1Mhz DCO. The msp430 mcu has factory calibrated clock values. When not displaying, this project enters a LPM3 (low-power mode 3) to conserve power. At LPM3 the DCO clock cannot be used and the project switches to use a 32Khz crystal based AClk to keep time. Features Minimal component count, 4 parts. Battery operated from 3V to 3.6V. Use of watchdog timer to keep time, power-down sleep mode (LPM3) takes uA power. 32Khz crystal to keep accurate time when sleep. Runs 1Mhz DCO calibrated clock when active (displaying time). This is a 12H clock, not 24H and has no AM/PM indicator. Easter egg application. Parts list msp430g2432 (or other G series dip 20pin devices w/ 4k+ flash) 8x8 LED matrix display (red only, this is a 3V project) tactile button 32Khz clock crystal 2x LR44 button cell or 3V-3.6V other battery source Application Notes Short key press in display mode cycles through HHMM, seconds, tix, dice, binary and sleep modes. Long press enters setup mode, subsequent long press rotates thru menu. Menu items cycles thru 'Set Clock', 'Dimmer', 'Auto-off'. In 'Set Clock' setup mode, short presses increment digit values (hours, minutes) and long press confirms. In 'Dimmer' setup mode, short presses cycles through available brightness levels, long press confirms setting. In 'Auto-off' setup mode, short presses toggle the auto-off on and off. With auto-off turned on, the clock displays time for 15 seconds and turn itself into LPM3 sleep mode to converse power. With auto-off turned off, display is on continuously. When in sleep mode, MCU goes in power down mode, consuming less than 30uA of power, 32Khz crystal w/ watchdog timer is used to keep time. A pin interrupt is enabled to allow for wake up via tactile button. In this mode the main clock is disabled to conserve power. Led segment multiplexing includes time delays to compensate for brightness differences for individual rows. Breadboard Layout the 8x8 led matrix has dot size of 1.9mm and is of common cathode, if you have common anode type, you can change a few lines in the code for adoption. see the following diagram and see if you have the right pin-outs. it appears they are quite common and if you purchase via ebay most suppliers have the same pin-out even if the model number is different. +=====================================================+ | . . +-------------------(1)------------(1) . . | | . . | . . . o||o (2)------------------+. . | (crystal) | . ./ | . . \. +--+--+--+--+--+--+--+ . |. . | | . (+) | . . o C7 C6 R1 C0 R3 C5 C3 R0 . |. . | (2xLR44 cell) | . .\ | . . /. | b2 b3 | . |. . | | . (+) | +--+--+--+--+--+--+--+--+--+ |. . | | | | |G b6 b7 T R a7 a6 b5 b4 b3|| | | | | | || | (msp430 mcu) | | | |+ a0 a1 a2 a3 a4 a5 b0 b1 b2|| | | . | (1) . . .+--+--+--+--+--+--+--+--+--+ |. . | | . +----------(+) +--+--+--+--+--+--+--+ (2)+. . | (8x8 red led matrix) | . . . . . . R4 R6 C1 C2 R7 C4 R5 R2 . . . | | . . . . . . . . . . . . . . . . . | | . . (1)-[ ]-(+) . . . . . . . . . . . | (tactile button) | . . . . . . . . . . . . . . . . . | +=====================================================+ *note: all (1)s, (2)s and (+) points are electrically connected Schematic MSP430G2xxx ----------------- --------------|RESET | | ------------|TEST | | | | | | | ROW5 <--|P2.0 P1.0|--> ROW4 (of LED Matrix) /|\ | | ROW2 <--|P2.1 P1.1|--> ROW6 | _|_ | --- ROW1 <--|P2.2 P1.2|--> COL1 --o o------ COL0 <--|P2.3 P1.3|--> COL2 Button ROW0 <--|P2.4 P1.4|--> ROW7 COL3 <--|P2.5 P1.5|--> COL4 32Khz /-- COL7 <--|P2.6(XIN) P1.6|--> COL5 Crystal \-- COL6 <--|P2.7(XOUT) P1.7|--> ROW3 | | Assembling Follow breadboard layout and place two jumper wires on mini breadboard Place msp430g2432 mcu Place 32Khz crystal Place Tactile Button Place power source (I am using 2xLR44 w/ magnets as holders) Finally place 8x8 led matrix on top of msp430g2432 /EDIT match clock mode description w/ photos, current build is on G2432, G2452,G2553, etc will also work. chibiace, ike, GastonP and 3 others 6 Quote Link to post Share on other sites
bluehash 1,581 Posted December 8, 2013 Share Posted December 8, 2013 Sweet! Loved the battey magnet idea... and excellent documentation. Quote Link to post Share on other sites
chibiace 46 Posted December 8, 2013 Share Posted December 8, 2013 thats one nice battery mount you got there Quote Link to post Share on other sites
abecedarian 330 Posted December 9, 2013 Share Posted December 9, 2013 Will I make enemies if I say I don't like you? I can only envy you. Well done! simpleavr 1 Quote Link to post Share on other sites
simpleavr 399 Posted December 9, 2013 Author Share Posted December 9, 2013 @@abecedarian you will hate me more when I reveal the "easter egg" application Like my original 3p4w clock, this project also has a hidden feature. I will reveal it just before voting starts (to get more upvotes). So the source code will only be release then. You can make a guess on what it is though. Or un-assembly this hex? mclock_hex.txt May be release the assembled listing next week if anyone is interested in reading. abecedarian and bluehash 2 Quote Link to post Share on other sites
enl 227 Posted December 9, 2013 Share Posted December 9, 2013 That is a wee bi evil. I like it... Quote Link to post Share on other sites
simpleavr 399 Posted January 24, 2014 Author Share Posted January 24, 2014 Are we voting for this round of POTM soon? Time to reveal my Easter Egg "game" for upvotes. Source code now host on github. https://github.com/simpleavr/mclock dubnet, yosh, t0mpr1c3 and 2 others 5 Quote Link to post Share on other sites
t0mpr1c3 91 Posted January 24, 2014 Share Posted January 24, 2014 What is that, triis? It's very cool as always! Quote Link to post Share on other sites
simpleavr 399 Posted January 25, 2014 Author Share Posted January 25, 2014 What is that, triis? Thanks. It's tetris-like. I had to limit the size and number of game pieces to make it playable on a 8x8 matrix. Quote Link to post Share on other sites
Fred 453 Posted January 26, 2014 Share Posted January 26, 2014 Very nice. A good idea for the battery holder. I'd never have thought of that - despite having 3 CR2032s joined with magnets sitting right on front of me. (I just did that so I wouldn't lose the batteries or magnets.) Quote Link to post Share on other sites
elpaso 15 Posted January 30, 2014 Share Posted January 30, 2014 @@simpleavr you're a genius! I really like the minimalistic approach, this is pure art. Thanks for this nice project. Quote Link to post Share on other sites
cde 334 Posted October 10, 2015 Share Posted October 10, 2015 Did you ever share the code for this? I desperately need this for halloween! Of course I missed the github link. Being able to run a matrix with just 3~4 parts, no resistors or transistors or shift registers/led driver is great. Quote Link to post Share on other sites
MicZ 0 Posted December 17, 2016 Share Posted December 17, 2016 Hi solved see the end of message I am very interested in your project matrix clock I wanted to compile it for a MSP430G2452 but I get compilation errors. By invoking the GNU compiler msp430g2452 Here is the compilation copy: **** Build of configuration Release__GNU (2) for project MSPclockG2452 **** "C: \\ ti \\ ccsv6 \\ utils \\ bin \\ gmake" -k all 'Building file: ../main.c' 'Invoking: GNU Compiler' "C: /energia-0101E0017/hardware/tools/msp430/bin/msp430-gcc.exe" -c -mmcu = msp430g2452 -I "C: / ti / ccsv6 / ccs_base / msp430 / include_gcc" -I " Energia-0101E0017 / hardware / tools / msp430 / msp430 / include "-O2 -Os -Wall -mhwmult = none -msilicon-errata = CPU4 -MMD -MP -MF" main.d "-MT" main.o "-o "Main.o" "../main.c" Subdir_rules.mk:7: recipe for target 'main.o' failed Cc1.exe: error: unrecognized command line option '-mhwmult = none' Cc1.exe: error: unrecognized command line option '-msilicon-errata = CPU4' Gmake: *** [main.o] Error 1 Gmake: Target 'all' not remade because of errors. **** Build Finished **** If I invoke the msp430_15.12.3.LTS I have no error but it does not work I'm newb in MSP can you help me please ? Work no i've used msp430-gcc on ubuntu and flashed an msp430g2452 and all is good . Quote Link to post Share on other sites
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