c625a8aaa2
Diagnosed from the user's console output - 25 chunks pushed cleanly at ~124ms each, then stalled. Two coupled causes: 1) Bus contention. tick() and Live sync share self.midi with the chunk ACKs. While the device was processing a chunk, a Note On / Clock Out / Live-sync FULL heartbeat could land on the same MIDI OUT stream and the host's parser dropped the interleaved ACK SysEx. Fix: self._fw_pushing flag set on 0x21 BEGIN, cleared on 0x23 COMMIT or any error. midi_send / Clock Out / _sync_broadcast / _sync_broadcast_full all early-out when _fw_pushing is True. Only ACKs go out during a push. 2) SysEx assembler garbage. self._sx = bytearray() per chunk leaks ~70 bytes / chunk that only GC'd every 50 chunks. 25 chunks of trash plus a slow heap walked the wrong way explains the ramp-up to 174 -> 119 -> 124 ms ACK times. GC every chunk now (~30ms cost on RP2040/RP2350 with small heap) so the assembler buffer is always fresh. Same patch on both pico-cp/ and pico-explorer/ since the bug is identical. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
66 lines
3.1 KiB
Python
66 lines
3.1 KiB
Python
#!/usr/bin/env python3
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"""PM_K-1 RTC (SKiDL): RV-8803-C7 I2C real-time clock for the practice-log timestamps.
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Run INSIDE the EDA container:
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cd hardware/eda && ./run.sh python3 ../eda/circuits/rtc.py
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Outputs ERC + hardware/kicad/rtc.net.
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VERIFIED pinout (Micro Crystal RV-8803-C7, 8-WCDFN 3.2x1.5mm):
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1=SDA 2=CLKOUT 3=VDD 4=CLKOE 5=VSS 6=/INT 7=EVI 8=SCL. Single VDD (no separate VBACKUP
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pin); ~240nA typ. Shares the touch I2C bus (SDA=GPIO8, SCL=GPIO9).
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BACKUP: diode-OR -- system +3V3 OR the CR2032 feed VDD_RTC through Schottkys, so the
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board runs the RTC off 3V3 when on, the coin cell only when off, and (importantly for an
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heirloom) the cell can be replaced WITHOUT the RTC losing time. Schottkys block charging
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the (non-rechargeable) cell.
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Unused pins: CLKOE->GND (CLKOUT disabled), CLKOUT->NC, EVI->GND (no event input),
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/INT pulled up + routed to RTC_INT (optional alarm IRQ to a GPIO).
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CONFIRM at layout: the RV-8803-C7 footprint, and cross-check the App Manual's recommended
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backup circuit.
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"""
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import os
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from skidl import *
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set_default_tool(KICAD9)
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P = Pin.types
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R = Part("Device","R", dest=TEMPLATE, footprint="Resistor_SMD:R_0402_1005Metric")
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def C(v): return Part("Device","C", value=v, footprint="Capacitor_SMD:C_0402_1005Metric")
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DS = Part("Device","D_Schottky", dest=TEMPLATE, footprint="Diode_SMD:D_SOD-323")
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p3v3, gnd = Net("+3V3"), Net("GND")
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p3v3.drive = POWER; gnd.drive = POWER
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i2c_sda, i2c_scl = Net("I2C_SDA"), Net("I2C_SCL") # shared bus (RP2350 GPIO8/9 + touch)
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vdd_rtc, rtc_int = Net("VDD_RTC"), Net("RTC_INT")
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RV8803 = Part(name="RV-8803-C7", tool=SKIDL, dest=TEMPLATE, ref_prefix="U",
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footprint="RTC_MicroCrystal:RV-8803-C7", # footprint: confirm at layout
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pins=[Pin(num=1,name="SDA",func=P.BIDIR),Pin(num=2,name="CLKOUT",func=P.OUTPUT),
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Pin(num=3,name="VDD",func=P.PWRIN),Pin(num=4,name="CLKOE",func=P.INPUT),
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Pin(num=5,name="VSS",func=P.PWRIN),Pin(num=6,name="INT",func=P.OPENCOLL),
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Pin(num=7,name="EVI",func=P.INPUT),Pin(num=8,name="SCL",func=P.INPUT)])
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u = RV8803(ref="U7")
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u["VDD"] += vdd_rtc; u["VSS"] += gnd
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u["SDA"] += i2c_sda; u["SCL"] += i2c_scl
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u["CLKOE"] += gnd # disable CLKOUT
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u["EVI"] += gnd # unused event input
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u["INT"] += rtc_int # open-drain alarm (optional)
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# CLKOUT left unconnected
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# diode-OR backup: 3V3 -> D1 -> VDD_RTC ; CR2032 -> D2 -> VDD_RTC
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d1, d2 = DS(value="BAT54"), DS(value="BAT54")
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p3v3 += d1[2]; d1[1] += vdd_rtc # D_Schottky pin1=K, pin2=A : anode at 3V3, cathode at VDD_RTC
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bt = Part("Device","Battery_Cell", value="CR2032",
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footprint="Battery:BatteryHolder_Keystone_1066_1x2032", ref="BT1")
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bt["+"] += d2[2]; d2[1] += vdd_rtc; bt["-"] += gnd
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crtc = C("100nF"); vdd_rtc += crtc[1]; crtc[2] += gnd
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# I2C pull-ups (bus shared with touch) + /INT pull-up, to 3V3
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for net in (i2c_sda, i2c_scl):
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r = R(value="4.7k"); net += r[1]; r[2] += p3v3
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rint = R(value="10k"); rtc_int += rint[1]; rint[2] += p3v3
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ERC()
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out = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", "kicad", "rtc.net"))
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generate_netlist(file_=out)
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print("RTC netlist ->", out)
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