35 lines
930 B
Lua
35 lines
930 B
Lua
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--
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-- LCDIF
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--
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STMP.pwm = {}
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function STMP.pwm.init()
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HW.LCDIF.CTRL.SFTRST.clr()
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HW.LCDIF.CTRL.CLKGATE.clr()
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end
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function STMP.pwm.enable(chan, en)
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if en then
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HW.PWM.CTRL.set(bit32.lshift(1, chan))
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else
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HW.PWM.CTRL.clr(bit32.lshift(1, chan))
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end
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end
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function STMP.pwm.setup(channel, period, cdiv, active, active_state, inactive, inactive_state)
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-- stop
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STMP.pwm.enable(channel, false)
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-- setup pin
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--FIXME
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-- watch the order ! active THEN period
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-- NOTE: the register value is period-1
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HW.PWM.ACTIVEn[channel].ACTIVE.write(active)
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HW.PWM.ACTIVEn[channel].INACTIVE.write(inactive)
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HW.PWM.PERIODn[channel].PERIOD.write(period - 1)
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HW.PWM.PERIODn[channel].ACTIVE_STATE.write(active_state)
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HW.PWM.PERIODn[channel].INACTIVE_STATE.write(inactive_state)
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HW.PWM.PERIODn[channel].CDIV.write(cdiv)
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-- restore
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STMP.pwm.enable(channel, true)
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end
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