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271dcc15e1
Note: pin functions need to be configured on this platform for output to go to a given pin.
36 lines
1007 B
Lua
36 lines
1007 B
Lua
-- Control LED intensity with PWM
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local pwmid, tmrid, ledpin
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if pd.board() == 'EK-LM3S8962' or pd.board() == 'EK-LM3S6965' or pd.board() == 'ET-STM32' or pd.board() == 'EAGLE-100' then
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pwmid, tmrid = 0, 1
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pwm.setclock( pwmid, 25000000 )
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elseif pd.board() == 'ELUA-PUC' then
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pwmid, tmrid = 7, 0
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local psel = cpu.r32( cpu.IO_PINSEL3 )
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psel = bit.bor( bit.band( psel, 0xFFFFFCFF ), 0x00000200 )
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cpu.w32( cpu.IO_PINSEL3, psel )
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elseif pd.board() == 'MBED' then
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pwmid, tmrid = 1, 0
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mbed.pio.configpin(mbed.pio.LED1, 2, 0, 0)
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else
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print( pd.board() .. " not supported by this example" )
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return
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end
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print "Control LED with PWM (fade up/down)"
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print "Press any key to exit"
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local crtduty, incr = 10, 5
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tmr.start( tmrid )
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pwm.setup( pwmid, 50000, crtduty )
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pwm.start( pwmid )
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while uart.getchar( 0, 0 ) == "" do
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if crtduty == 95 or crtduty == 5 then
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incr = -incr
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end
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crtduty = crtduty + incr
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pwm.setup( pwmid, 50000, crtduty )
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tmr.delay( tmrid, 50000 )
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end
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pwm.stop( pwmid )
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