diff options
Diffstat (limited to '')
| -rwxr-xr-x | bin/build.sh | 2 | ||||
| -rwxr-xr-x | bin/flash-25.sh | 4 | ||||
| -rwxr-xr-x | bin/level_calc.py | 220 |
3 files changed, 128 insertions, 98 deletions
diff --git a/bin/build.sh b/bin/build.sh index 0d53b57..68f981d 100755 --- a/bin/build.sh +++ b/bin/build.sh @@ -8,7 +8,7 @@ export ATTINY=13 export MCU=attiny$ATTINY export CC=avr-gcc export OBJCOPY=avr-objcopy -export CFLAGS="-Wall -g -Os -mmcu=$MCU -c -std=gnu99 -DATTINY=$ATTINY -I.." +export CFLAGS="-Wall -g -Os -mmcu=$MCU -c -std=gnu99 -DATTINY=$ATTINY -I.. -I../.. -I../../.." export OFLAGS="-Wall -g -Os -mmcu=$MCU" export LDFLAGS= export OBJCOPYFLAGS='--set-section-flags=.eeprom=alloc,load --change-section-lma .eeprom=0 --no-change-warnings -O ihex' diff --git a/bin/flash-25.sh b/bin/flash-25.sh index bb5dd34..0b24bb2 100755 --- a/bin/flash-25.sh +++ b/bin/flash-25.sh @@ -1,4 +1,4 @@ #/bin/sh FIRMWARE=$1 -avrdude -c usbasp -p t25 -u -Uflash:w:$FIRMWARE -U lfuse:w:0xd2:m -U hfuse:w:0xde:m -U efuse:w:0xff:m -# http://www.engbedded.com/cgi-bin/fcx.cgi?P_PREV=ATtiny25&P=ATtiny25&M_LOW_0x3F=0x12&M_HIGH_0x07=0x06&M_HIGH_0x20=0x00&B_SPIEN=P&B_SUT0=P&B_CKSEL3=P&B_CKSEL2=P&B_CKSEL0=P&B_BODLEVEL0=P&V_LOW=E2&V_HIGH=DE&V_EXTENDED=FF +avrdude -c usbasp -p t25 -u -U lfuse:w:0xd2:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m -Uflash:w:$FIRMWARE +# http://www.engbedded.com/cgi-bin/fcx.cgi?P_PREV=ATtiny25&P=ATtiny25&M_LOW_0x3F=0x22&M_HIGH_0x07=0x07&M_HIGH_0x20=0x00&B_SUT1=P&B_SPIEN=P&B_CKSEL3=P&B_CKSEL2=P&B_CKSEL0=P&V_LOW=D2&V_HIGH=DF&V_EXTENDED=FF diff --git a/bin/level_calc.py b/bin/level_calc.py index 63926ba..de52998 100755 --- a/bin/level_calc.py +++ b/bin/level_calc.py @@ -4,115 +4,142 @@ import math interactive = False + def main(args): """Calculates PWM levels for visually-linear steps. """ # Get parameters from the user - v = dict(pwm_max=255, pwm2_max=255) - questions = [ + questions_main = [ + (int, 'num_channels', 1, 'How many power channels?'), (int, 'num_levels', 4, 'How many total levels do you want?'), - (int, 'pwm_min', 6, 'Lowest visible PWM level, for moon mode:'), - (float, 'lm_min', 0.25, 'How bright is moon mode, in lumens?'), + ] + questions_per_channel = [ + (str, 'type', '7135', 'Type of channel - 7135 or FET:'), + (int, 'pwm_min', 6, 'Lowest visible PWM level:'), + (float, 'lm_min', 0.25, 'How bright is the lowest level, in lumens?'), #(int, 'pwm_max', 255, 'Highest PWM level:'), (float, 'lm_max', 1000, 'How bright is the highest level, in lumens?'), - (str, 'dual_pwm', 'n', 'Use dual PWM? [y/n]'), - (float, 'pwm2_min', 6, 'Second channel, lowest visible PWM level:'), - (float, 'lm2_min', 0.25, 'Second channel, how bright is the lowest mode, in lumens?'), - #(float, 'pwm2_max', 255, 'Second channel, highest PWM level:'), - (float, 'lm2_max', 140, 'Second channel, how bright is maximum, in lumens?'), ] - for typ, name, default, text in questions: - value = get_value(text, default, args) - if not value: - value = default - else: - value = typ(value) - v[name] = value - if (name == 'dual_pwm' and value == 'n'): - # skip remaining questions if not using dual PWM - break - - if v['dual_pwm'] == 'y': - dual_pwm(v) - else: - single_pwm(v) + + def ask(questions, ans): + for typ, name, default, text in questions: + value = get_value(text, default, args) + if not value: + value = default + else: + value = typ(value) + setattr(ans, name, value) + + answers = Empty() + ask(questions_main, answers) + channels = [] + if not args: + print('Describe the channels in order of lowest to highest power.') + for chan_num in range(answers.num_channels): + if not args: + print('===== Channel %s =====' % (chan_num+1)) + chan = Empty() + chan.pwm_max = 255 + ask(questions_per_channel, chan) + channels.append(chan) + + # calculate total output of all previous channels + for i, channel in enumerate(channels): + channel.prev_lm = 0.0 + for j in range(i): + if channels[j].type == '7135': + channel.prev_lm += channels[j].lm_max + + # figure out the desired PWM values + multi_pwm(answers, channels) if interactive: # Wait on exit, in case user invoked us by clicking an icon print 'Press Enter to exit:' raw_input() -def single_pwm(v): - """Estimate the PWM levels for a one-channel driver.""" - visual_min = invpower(v['lm_min']) - visual_max = invpower(v['lm_max']) - step_size = (visual_max - visual_min) / (v['num_levels']-1) - modes = [] - goal = visual_min - for i in range(v['num_levels']): - goal_lm = power(goal) - #pwm_float = ((goal_lm / v['lm_max']) * (256-v['pwm_min'])) + v['pwm_min'] - 1 - pwm_float = (((goal_lm-v['lm_min']) / (v['lm_max']-v['lm_min'])) \ - * (255-v['pwm_min'])) \ - + v['pwm_min'] - pwm = int(round(pwm_float)) - pwm = max(min(pwm,v['pwm_max']),v['pwm_min']) - modes.append(pwm) - print '%i: visually %.2f (%.2f lm): %.2f/255' % (i+1, goal, goal_lm, pwm_float) - goal += step_size - - print 'PWM values:', ','.join([str(i) for i in modes]) - -def dual_pwm(v): - """Estimate the PWM levels for a two-channel driver. - Assume the first channel is the brighter one, and second will be used for moon/low modes. - """ - #visual_min = math.pow(v['lm2_min'], 1.0/power) - #visual_max = math.pow(v['lm_max'], 1.0/power) - visual_min = invpower(v['lm2_min']) - visual_max = invpower(v['lm_max']) - step_size = (visual_max - visual_min) / (v['num_levels']-1) - modes = [] - goal = visual_min - for i in range(v['num_levels']): - goal_lm = power(goal) - # Up to the second channel's limit, calculate things just like a - # single-channel driver (first channel will be zero) - if goal_lm <= v['lm2_max']: - pwm1_float = 0.0 - #pwm2_float = ((goal_lm / v['lm2_max']) * (256-v['pwm2_min'])) + v['pwm2_min'] - 1 - pwm2_float = (((goal_lm-v['lm2_min']) / (v['lm2_max']-v['lm2_min'])) \ - * (255-v['pwm2_min'])) \ - + v['pwm2_min'] - pwm1 = int(round(pwm1_float)) - pwm2 = int(round(pwm2_float)) - pwm2 = max(min(pwm2,v['pwm2_max']),v['pwm2_min']) - modes.append((int(pwm1),int(pwm2))) - # Above the second channel's limit, things get a little more - # complicated (second channel will be 255, first channel will be - # adjusted down by the max output of the second channel) + +class Empty: + pass + + +def multi_pwm(answers, channels): + lm_min = channels[0].lm_min + # figure out the highest mode + lm_max = max([(c.lm_max+c.prev_lm) for c in channels]) + if channels[-1].type == 'FET': + if channels[-1].lm_max > channels[-1].prev_lm: + # assume the highest output is with only the FET enabled + lm_max = channels[-1].lm_max else: - if len(modes) == v['num_levels'] -1: # turbo is special - #pwm1_float = ((goal_lm / v['lm_max']) * (256-v['pwm_min'])) + v['pwm_min'] - 1 - pwm1_float = float(v['pwm_max']) - # on a FET+7135 driver, turbo works better without the 7135 - # (we're assuming FET+7135 here) - pwm2_float = 0.0 - else: # not the highest mode yet - #pwm1_float = (((goal_lm-v['lm2_max']) / v['lm_max']) * (256-v['pwm_min'])) + v['pwm_min'] - 1 - pwm1_float = (((goal_lm-v['lm_min']-v['lm2_max']) / (v['lm_max']-v['lm_min'])) \ - * (255-v['pwm_min'])) \ - + v['pwm_min'] - pwm2_float = 255.0 - pwm1 = int(round(pwm1_float)) - pwm2 = int(round(pwm2_float)) - pwm1 = max(min(pwm1,v['pwm_max']),v['pwm_min']) - modes.append((int(pwm1),int(pwm2))) - print '%i: visually %.2f (%.2f lm): %.2f/255, %.2f/255' % (i+1, goal, goal_lm, pwm1_float, pwm2_float) - goal += step_size - - print 'PWM1/FET values:', ','.join([str(i[0]) for i in modes]) - print 'PWM2/7135 values:', ','.join([str(i[1]) for i in modes]) - print 'On a non-FET driver, the last mode should be 255 on both channels.' + # this would be a stupid driver design + raise ValueError, "FET channel isn't the most powerful?" + + visual_min = invpower(lm_min) + visual_max = invpower(lm_max) + step_size = (visual_max - visual_min) / (answers.num_levels-1) + + # Determine ideal lumen levels + goals = [] + goal_vis = visual_min + for i in range(answers.num_levels): + goal_lm = power(goal_vis) + goals.append((goal_vis, goal_lm)) + goal_vis += step_size + + # Calculate each channel's output for each level + for cnum, channel in enumerate(channels): + channel.modes = [] + for i in range(answers.num_levels): + goal_vis, goal_lm = goals[i] + # This channel already is maxed out + if goal_lm >= (channel.lm_max + channel.prev_lm): + # This shouldn't happen, the FET is assumed to be the highest channel + if channel.type == 'FET': + # this would be a stupid driver design + raise ValueError, "FET channel isn't the most powerful?" + + # Handle FET turbo specially + if (i == (answers.num_levels - 1)) \ + and (cnum < (len(channels)-1)) \ + and (channels[-1].type == 'FET'): + channel.modes.append(0.0) + # Normal non-turbo mode or non-FET turbo + else: + channel.modes.append(channel.pwm_max) + # This channel's active ramp-up range + #elif goal_lm > (channel.prev_lm + channel.lm_min): + elif goal_lm > channel.prev_lm: + # assume 7135 channels all add together + if channel.type == '7135': + diff = channel.lm_max - channel.lm_min + # assume FET channel gets higher output on its own + elif channel.type == 'FET': + diff = channel.lm_max - channel.prev_lm - channel.lm_min + + needed = goal_lm - channel.prev_lm - channel.lm_min + + ratio = needed / diff * (channel.pwm_max-channel.pwm_min) + pwm = max(0, ratio + channel.pwm_min) + channel.modes.append(pwm) + # This channel isn't active yet, output too low + else: + channel.modes.append(0) + + # Show individual levels in detail + for i in range(answers.num_levels): + goal_vis, goal_lm = goals[i] + pwms = [] + for channel in channels: + pwms.append('%.2f/%i' % (channel.modes[i], channel.pwm_max)) + print('%i: visually %.2f (%.2f lm): %s' % + (i+1, goal_vis, goal_lm, ', '.join(pwms))) + + # Show values we can paste into source code + for cnum, channel in enumerate(channels): + print('PWM%s values: %s' % + (cnum+1, + ','.join([str(int(round(i))) for i in channel.modes]))) + def get_value(text, default, args): """Get input from the user, or from the command line args.""" @@ -127,6 +154,7 @@ def get_value(text, default, args): result = result.strip() return result + def power(x): #return x**5 return x**3 @@ -134,6 +162,7 @@ def power(x): #return math.e**x #return 2.0**x + def invpower(x): #return math.pow(x, 1/5.0) return math.pow(x, 1/3.0) @@ -141,6 +170,7 @@ def invpower(x): #return math.log(x, math.e) #return math.log(x, 2.0) + if __name__ == "__main__": import sys main(sys.argv[1:]) |