13 lines
371 B
Lua
13 lines
371 B
Lua
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RK27XX.adc = {}
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function RK27XX.adc.init()
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-- setup ADC clock divider to reach max 1MHz
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HW.SCU.DIVCON1.write(bit32.replace(HW.SCU.DIVCON1.read(), 49, 10, 8))
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end
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function RK27XX.adc.read(channel)
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HW.ADC.CTRL.write(bit32.bor(bit32.lshift(1,4), bit32.lshift(1,3), bit32.band(channel,3)))
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-- udelay(20)
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return bit32.band(HW.ADC.DATA.read(), 0x3ff)
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end
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