Basic Micro Studio Syntax Manual

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PWM <strong>Syntax</strong> pwm pin, period, duty, cycles • Pin - is a variable, constant or expression that specifi es the pin to use. Commands • Period - is a variable, constant or expression that specifi es the period of the pulse width signal in half microsecond increments. • Duty - is a variable, constant or expression that specifi es the period of the duty cycle pulse width signal in half microsecond increments. • Duration - is a variable, constant or expression that specifi es the number of pulses to output. Supported • BA - Supported • BAN - Supported • BAP - Supported • BAP40 - Supported Description The PWM command generates a pulse width modulated signal. PWM has several uses, some of which are generating an analog voltage, DC motor control, servo control or generating a frequency. To create an analog voltage, the pin is switched from high to low. During the transition, leaving the pin high for a certain amount of time versus low will cause a voltage change. The pin output is averaged If the pin was high (5V) 50% of the time and then low (0V) the other 50% the voltage output would be around 2.5V. By adjusting how long the pin is high or low we can control the output voltage with a simple RC circuit. Schematic The schematic below is a simple RC fi lter. The resistor and capacitor values can be changed to affect the fi nal output. The code snippet will generate a 50% duty cycle. Which, with no load, will output 2.5V on the output side of our RC fi lter. Build the circuit, run this program and attach a volt meter probe to the output. Try adjusting the duty cycle to see the results. pwm p0,1000,500,1000 IN R1 10K C1 10uF OUT 164
Commands Duty Cycle The following chart is what the signal would look like on an oscilloscope at specifi c duty cycles. This will give you an idea of what the duty cycles look like. You can see the on times, more on time would mean more charge for our RC circuit which would increase its output voltage. At 0% duty cycle the pin is always low. At 100% duty cycle the pin is always high. 0% 10% 25% 50% 75% 100% Duty Cycles 165
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Basic Micro Studio Syntax Manual Ba
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Introduction ......................
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FCOSH .............................
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Introduction Introduction Welcome t
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Introduction Hardware Introduction
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Hardware Nano 8 The BasicATOM Nano
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Hardware Nano 40 The BasicATOM Nano
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Hardware Nano 40X The BasicATOM Nan
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Hardware BasicATOM 40m The BasicATO
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Hardware BasicATOM Pro 28m The Basi
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Quick Start Guide The next few page
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Quick Start Quick Start Before writ
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Quick Start 1. Microcontroller Fami
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Quick Start If the program is corre
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Quick Start Terminal Window Connect
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Variables 31 Variables
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Defi ning Variables Variables are d
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Out of Range When declaring variabl
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Constants Structure - Constants Con
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Pins and Ports Structure - Pins and
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Direction Variables The DIR variabl
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Math 43 Math
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Operators Operator Description Stru
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- (Negative) ABS Signs an expressio
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DCD NCD Structure - Math DCD is sim
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BIN2BCD, BCD2BIN RANDOM Structure -
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Division (/) Structure - Math Divid
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MAX MIN DIG REV The MAX function re
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AND (&) OR ( | ) Structure - Math T
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XOR NOT (^/) Structure - Math The X
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OR XOR Structure - Math The OR oper
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Floating Point Math TOINT TOFLOAT S
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FASIN FACOS FATAN FLN Structure - M
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Structure - Math Hyperbolic Functio
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Modifi ers In MBasic, all values ar
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DEC DEC{#max} expression{\#min} #ma
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HEX HEX{#max} expression{\#min} #ma
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IHEX IHEX{#max} expression{\#min} #
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BIN BIN{#max} expression{\#min} #ma
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IBIN IBIN{#max} expression{\#min} #
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REAL REAL{#maxint} expression{\#max
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Command Reference 83 Command Refere
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ADIN Syntax adin pin, result Comman
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ADIN16 Syntax adin16 pin, result
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Commands Examples Connect to the fo
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Commands The BUTTON command must be
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CLEAR Syntax clear Supported • BA
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DEBUG Syntax debug [{modifi ers}dat
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DEBUGIN Syntax debugin [{modifi ers
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DO - WHILE Syntax do program statem
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DTMFOUT Syntax dtmfout pin,{ontime,
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DTMFOUT2 Syntax dtmfout2 Lpin\Hpin,
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END Syntax end Supported • BA - s
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FATAN2 Syntax fatan2 xval\yval,vari
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Commands Example The example below
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Commands The next program will incr
Page 113 and 114: Commands Example The program below
Page 115 and 116: HIGH Syntax high pin • PIN - is a
Page 117 and 118: Commands The rate of the high side
Page 119 and 120: Commands SETHSERIAL MBasic must cre
Page 121 and 122: BAP Error BAP40 Error BA Error BAN
Page 123 and 124: HSERVO Syntax hservo [pin\pos\spd,
Page 125 and 126: IF...THEN...ELSEIF...ELSE...ENDIF S
Page 127 and 128: Commands Advance Arguments Now that
Page 129 and 130: INPUT Syntax input pin Commands •
Page 131 and 132: Commands Schematic The following sc
Page 133 and 134: I2CIN Syntax i2cin sda, scl, contro
Page 135 and 136: Commands Examples Connect to the fo
Page 137 and 138: Commands Schematic The schematic sh
Page 139 and 140: LCD Command Table Command Value Fun
Page 141 and 142: Commands Custom Characters Most HD4
Page 143 and 144: LCDREAD Syntax lcdread RS\ E\ D7\ D
Page 145 and 146: LOOKDOWN Syntax lookdown value,{ope
Page 147 and 148: LOOKUP Syntax lookup index,[list],t
Page 149 and 150: LOW Syntax low pin • Pin - is a v
Page 151 and 152: OWIN Syntax owin pin,mode,{FailLabe
Page 153 and 154: OWOUT Syntax owout pin,mode,{NCLabe
Page 155 and 156: OUTPUT Syntax output pin • Pin -
Page 157 and 158: PAUSEUS Syntax pauseus time Command
Page 159 and 160: ;AtomPro pauseclk example Serout s_
Page 161 and 162: Schematics Connect a momentary swit
Page 163: Commands Examples The example progr
Page 167 and 168: Commands Schematic The schematic ca
Page 169 and 170: READ Syntax read address, databyte
Page 171 and 172: REPEAT - UNTIL Syntax repeat progra
Page 173 and 174: Commands Example The program below
Page 175 and 176: SERIN Syntax serin rxpin{\fpin},bau
Page 177 and 178: Commands Parity Parity is used to d
Page 179 and 180: Commands In other cases you may wan
Page 181 and 182: Commands All of the Basic Micro mod
Page 183 and 184: Commands Limitations The Nano maxim
Page 185 and 186: SERVO Syntax servo pin,pos{,repeat}
Page 187 and 188: Speeds Processor Mode 0-4 Mode 5-7
Page 189 and 190: ;[PS2 Controller Constants] DAT con
Page 191 and 192: SHIFTOUT Syntax shiftout dpin,cpin,
Page 193 and 194: Commands Notes 1. SHIFTIN and SHIFT
Page 195 and 196: SOUND Syntax sound pin, [duration\n
Page 197 and 198: SOUND2 Syntax sound2 pin1\pin2,[dur
Page 199 and 200: SWAP Syntax swap variable1, variabl
Page 201 and 202: WHILE - WEND Syntax while condition
Page 203 and 204: WRITE Syntax write address, data
Page 205 and 206: Interrupts 205 Interrupts
Page 207 and 208: RESUME resume Interrupts This comma
Page 209 and 210: BAP ONE/24/28 Only Interrupt Types
Page 211 and 212: Basic Stamp Conversion Basic Stamp
Page 213 and 214: INPUT The INPUT command functions t
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Basic Stamp Conversion POLLWAIT The
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Compiler Directives 217 Compiler Di
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#IF .. #ENDIF #IF expression option
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#ELSEIFDEF, #ELSEIFNDEF Equivalents
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Reserved Words Reserved Words The f
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Reserved Words Name Name Name Name
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Reserved Words Name Name Name Name
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ASCII Table 229 ASCII Table
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