Jeff Wang
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9fc462ca94
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bugfix for backspacing from exp entry all the back to significand entry
check for '.' needs to be after entry_i--
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2019-10-02 22:47:32 -04:00 |
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Jeff Wang
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5a3dc2337d
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more checks for NaN/errors before performing operations
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2019-10-02 22:46:26 -04:00 |
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Jeff Wang
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23e49a0405
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NUM_A_ARRAY cannot be less than num_lsu
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2019-10-02 22:45:02 -04:00 |
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Jeff Wang
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ac1aaac096
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initial natural log implementation
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2019-10-02 22:43:23 -04:00 |
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Jeff Wang
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acc9c4821f
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prototyping of reciprocal and log functions
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2019-10-02 02:52:08 -04:00 |
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Jeff Wang
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6eb48de844
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more comments
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2019-09-24 00:11:51 -04:00 |
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Jeff Wang
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4f020da222
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use global registers for division, have sub_mag() operate directly on Accum and B
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2019-09-23 23:46:58 -04:00 |
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Jeff Wang
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747355222d
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try to remove more trailing 0s
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2019-09-23 23:06:43 -04:00 |
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Jeff Wang
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9dcb16681e
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fix desktop build warnings
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2019-09-23 22:57:34 -04:00 |
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Jeff Wang
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eccd89807a
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improve initial estimate for division newton raphson iteration
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2019-09-23 22:48:06 -04:00 |
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Jeff Wang
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52ddf7dd96
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do not require BDecn to be preserved (frees up some xdata and code space)
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2019-05-02 03:49:21 -04:00 |
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Jeff Wang
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0049f3df98
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do not compile with stack auto, change functions to be nonreentrant, use fixed parameters
- frees up ~4KB of code space
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2019-05-02 03:27:01 -04:00 |
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Jeff Wang
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6399cbf44f
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modify code to use accumulator architecture to minimize pointer usage
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2019-05-01 03:54:57 -04:00 |
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Jeff Wang
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96c762aeed
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missed change for making number of exponent bits settable
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2019-05-01 01:49:16 -04:00 |
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Jeff Wang
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60ed369c47
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compare exponent directly for determining NaN
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2019-05-01 01:40:23 -04:00 |
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Jeff Wang
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58a162fe4d
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allow number of exponent bits to be adjustable
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2019-05-01 01:37:14 -04:00 |
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Jeff Wang
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4b87ad27c8
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speed up division
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2019-05-01 01:11:25 -04:00 |
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Jeff Wang
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fcf16153f6
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change exponent from int16_t to int8_t to free up some space
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2019-04-05 02:39:09 -04:00 |
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Jeff Wang
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836d4fc122
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fix emulator lcd/calculator thread startup race
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2019-04-05 02:10:10 -04:00 |
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Jeff Wang
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20946c44d4
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detect division by 0
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2019-04-05 01:07:42 -04:00 |
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Jeff Wang
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ef298cddd0
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fix crash when displaying numbers between [0.1, 1)
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2019-04-05 00:52:56 -04:00 |
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Jeff Wang
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66c611795e
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allow printing unknown characters in lcd emulator
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2019-04-05 00:47:21 -04:00 |
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Jeff Wang
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ee917a71e5
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add version string at poweron, also check for poweroff keys in interrupt
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2019-04-05 00:47:07 -04:00 |
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Jeff Wang
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8af9701e15
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bugfix for entering numbers such as 0.33
this is a partial revert of commit 8550049335
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2019-04-04 03:36:35 -04:00 |
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Jeff Wang
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240dd570ae
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fix for LCD row tracking, fix for "phantom" keypress at powerup
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2019-04-04 03:01:33 -04:00 |
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Jeff Wang
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4734fe5a0e
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add keyboard, fix display of negative numbers
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2019-04-04 02:46:10 -04:00 |
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Jeff Wang
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8550049335
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fix bug for entering numbers such as 0.01
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2019-04-04 02:29:11 -04:00 |
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Jeff Wang
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5e04a18cd2
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use semaphores for keyboard and lcd, add lcd thread for calling updateLcd()
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2019-04-04 01:54:02 -04:00 |
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Jeff Wang
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89c5f0dc6c
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only process calculator keys and update lcd if keys pressed
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2019-04-04 00:33:46 -04:00 |
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Jeff Wang
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fc6d8efc5f
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work on Qt GUI, still not working properly
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2019-04-04 00:33:42 -04:00 |
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Jeff Wang
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8f39958679
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start working on gui
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2019-04-03 00:07:15 -04:00 |
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Jeff Wang
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1be980d85b
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fix reciprocol convergence
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2019-04-02 23:57:28 -04:00 |
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Jeff Wang
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0278165339
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remove unused funtion
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2019-04-02 23:56:54 -04:00 |
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Jeff Wang
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bb102add67
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add exponent character
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2019-04-01 02:38:17 -04:00 |
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Jeff Wang
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f5d8d601a2
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bugfix for keys
- initialize count, so that there is no initial keypress at powerup
- use int8_t instead of uint32_t to pass new key, since only 1 new key
used
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2019-04-01 01:55:47 -04:00 |
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Jeff Wang
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8aec2ae134
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fix exponent display
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2019-04-01 01:12:02 -04:00 |
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Jeff Wang
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75a9c92b7d
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fix desktop build
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2019-03-31 23:34:25 -04:00 |
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Jeff Wang
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fa0afa726b
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update readme
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2019-03-31 23:34:13 -04:00 |
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Jeff Wang
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12e7f010e6
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bugfix: latch on immediately, to ensure calculator stays on after poweron
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2019-03-31 19:37:55 -04:00 |
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Jeff Wang
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d1ec11cad8
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allow correct building/syntax highlighting on desktop
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2019-03-31 19:37:55 -04:00 |
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Jeff Wang
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4ed3d1654e
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various bugfixes for decn arithmetic
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2019-03-31 19:37:55 -04:00 |
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Jeff Wang
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43edb291cf
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attempt to reduce space usage
- remove unecessary code
- ifdef "extra" code
- pass data through globals instead of functions accessing static data
- functions non-reentrant, locate tmps in xdata
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2019-03-31 19:37:52 -04:00 |
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Jeff Wang
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ecb0492534
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initial calculator code
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2019-03-31 19:33:59 -04:00 |
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Jeff Wang
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bdecc32b86
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use global Buf everywhere for debugging
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2019-03-28 00:41:54 -04:00 |
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Jeff Wang
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91b7b82462
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add normal number display, number display bug fixes
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2019-03-28 00:34:41 -04:00 |
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Jeff Wang
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4405ee7c8f
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division
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2019-03-27 05:23:26 -04:00 |
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Jeff Wang
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b3c73cbdb5
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style fixes
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2019-03-27 05:22:47 -04:00 |
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Jeff Wang
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116b6ed2e6
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bugfixes for multiply
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2019-03-27 05:22:21 -04:00 |
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Jeff Wang
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0ba2ca7710
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bugfixes for addition/subtraction
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2019-03-27 05:22:19 -04:00 |
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Jeff Wang
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a742bb2059
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separate out set_exponent function
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2019-03-27 05:17:32 -04:00 |
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