37 lines
758 B
Plaintext
37 lines
758 B
Plaintext
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from micropython import const
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from time import sleep_us
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import machine
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dac_sel = const(4026531844)
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dac_arm = const(4026531852)
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dac_fin = const(4026531848)
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dac_from = const(4026531856)
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dac_to = const(4026531860)
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machine.mem8[dac_sel] = 1
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def dac_comm(val):
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machine.mem32[dac_to] = val
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machine.mem8[dac_arm] = 1
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while machine.mem8[dac_fin] == 0:
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pass
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machine.mem8[dac_arm] = 0
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def dac_read(val):
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dac_comm(1 << 23 | val)
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dac_comm(0)
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v = bin(machine.mem32[dac_from])
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print(v, len(v) - 2)
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# dac_comm(0b11010010001)
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dac_comm(1 << 22 | 1 << 2)
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dac_comm(1 << 21 | (1 << 1))
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dac_read(1 << 21)
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def dac_ramp_up(fromval,toval,step,ival):
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assert step > 0
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while fromval <= toval:
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dac_comm(1 << 20 | fromval)
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sleep_us(ival)
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fromval = fromval + step
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