transfer

ato.yaml

@@ -3,4 +3,7 @@ builds:
   default:
     entry: elec/src/cell-sim.ato:CellSim
 dependencies:
-- generics
+- name: generics
+  version_spec: '@09ad6baeaab93d53b9b6c90069ac750f4161d76f'
+  link_broken: true
+  path: elec/src/generics

elec/src/cell-sim.ato

@@ -1,2 +1,130 @@
 module CellSim:
-    signal gnd
+    power_in = new Power
+    power_batt = new Power
+    power_5v = new Power
+    power_3v3 = new Power
+    dmm_out = new Power
+
+    micro = new ESP32S3
+    usbc = new USBCConn
+
+    # Power input
+    input_filter = new PiFilter
+    power_connector = new XT30_Male_Right_Angle
+    current_sensor = new CurrentSensor
+    current_sensor.current = 10A
+    power_connector.power ~ input_filter.power_in
+    input_filter.power_out ~ current_sensor.power_in
+    current_sensor.power_out ~ power_in
+
+    # Configure current sensor
+    power_3v3 ~ current_sensor.power
+
+    # Input voltage sense
+    voltage_sense = new VDiv
+    power_in ~ voltage_sense.power
+    voltage_sense.v_out = 0V to 3V
+    voltage_sense.out ~ micro.io16
+
+    # DMM output
+    dmm_connector = new BananaPower
+    dmm_connector.power ~ dmm_out
+
+    # Micro connections
+    power_3v3 ~ micro.power
+    usbc.usb2 ~ micro.usb2
+
+    # LCD
+    lcd = new LCDConnector
+    power_3v3 ~ lcd.power
+    micro.i2c ~ lcd.i2c
+    lcd.address = "0x3C"
+
+    # I2C mux
+    mux = new TCA9548APWR
+    power_3v3 ~ mux.power
+    micro.i2c ~ mux.i2c
+    mux.address = "0x70"
+
+    i2c_pullup = new I2CPullup
+    power_3v3 ~ i2c_pullup.power
+    micro.i2c ~ i2c_pullup.i2c
+    i2c_pullup.r_scl.value = 2kohm +/- 20%
+    i2c_pullup.r_sda.value = 2kohm +/- 20%
+    i2c_pullup.r_scl.package = "0402"
+    i2c_pullup.r_sda.package = "0402"
+
+    # regulator to 5V
+    buck = new LV2842Kit
+    buck.v_in = 12V +/- 10%
+    buck.v_out = 5V +/- 5%
+    power_in ~ buck.power_in
+
+    # Diode or USB supply to 5V rail
+    diode_or = new PowerDiodeOr
+    usbc.power ~ diode_or.power_in1
+    buck.power_out ~ diode_or.power_in2
+    diode_or.power_out ~ power_5v
+
+    # regulator to 3.3V
+    ldo3v3 = new LDK220M_R
+    ldo3v3.v_in = buck.v_out
+    ldo3v3.v_out = 3.3V +/- 10%
+    power_5v ~ ldo3v3.power_in
+    ldo3v3.power_out ~ power_3v3
+
+    # LEDs
+    level_shifter = new LevelShifter
+    power_3v3 ~ level_shifter.power_lv
+    power_5v ~ level_shifter.power_hv
+    micro.io15 ~ level_shifter.lv_signal
+
+    # Connect cells in a stack
+    cell1 = new Cell
+    mux.i2c1 ~ cell1.i2c
+    power_in ~ cell1.power_in
+    power_5v ~ cell1.power_5v
+    power_3v3 ~ cell1.power_isolator
+    dmm_out ~ cell1.dmm_out
+    level_shifter.hv_signal ~ cell1.cell_down.led_data
+    power_in.gnd ~ cell1.cell_down.cell
+
+    cell2 = new Cell
+    mux.i2c2 ~ cell2.i2c
+    power_in ~ cell2.power_in
+    power_5v ~ cell2.power_5v
+    power_3v3 ~ cell2.power_isolator
+    dmm_out ~ cell2.dmm_out
+    cell1.cell_up ~ cell2.cell_down
+
+    cell3 = new Cell
+    mux.i2c3 ~ cell3.i2c
+    power_in ~ cell3.power_in
+    power_5v ~ cell3.power_5v
+    power_3v3 ~ cell3.power_isolator
+    dmm_out ~ cell3.dmm_out
+    cell2.cell_up ~ cell3.cell_down
+
+    # Connect power_batt across the stack
+    power_batt.vcc ~ cell3.power_out.vcc
+    power_batt.gnd ~ cell1.power_out.gnd
+
+    # Debugging
+    i2c_debug = new SaleaeHeader
+    micro.i2c ~ i2c_debug.i2c
+    power_5v.vcc ~ i2c_debug.ch2.io
+    power_3v3.vcc ~ i2c_debug.ch3.io
+    i2c_debug.gnd ~ power_in.gnd
+
+    cell3_debug_1 = new SaleaeHeader
+    cell3._iso_i2c ~ cell3_debug_1.i2c
+    cell3.buck.power_out.vcc ~ cell3_debug_1.ch2.io
+    cell3.ldo.power_out.vcc ~ cell3_debug_1.ch3.io
+    cell3_debug_1.gnd ~ cell3._power_5v.gnd
+
+    cell3_debug_2 = new SaleaeHeader
+    cell3.current_sense.output ~ cell3_debug_2.ch0.io
+    cell3.output_relay.input ~ cell3_debug_2.ch1.io
+    cell3.dmm_relay.input ~ cell3_debug_2.ch2.io
+    cell3._power_3v3.vcc ~ cell3_debug_2.ch3.io
+    cell3_debug_2.gnd ~ cell3._power_5v.gnd

elec/src/cell.ato

@@ -0,0 +1,179 @@
+# Generics
+from "generics/interfaces.ato" import Power, I2C
+from "generics/resistors.ato" import SeriesPowerResistors, Resistor
+
+# Components
+from "i2c-devices/iso1640.ato" import ISO1640BDR
+from "i2c-devices/mcp4725.ato" import MCP4725A0T
+from "i2c-devices/ads1115.ato" import ADS1115IDGSR
+from "regulators/digitalBuck.ato" import DigitalBuck
+from "regulators/digitalLDO.ato" import DigitalLDO
+from "regulators/b1205s.ato" import B1205S_2WR2
+from "current-sensor.ato" import CurrentSensor
+from "relay.ato" import Relay
+
+
+module Cell:
+    """
+    Power:
+    Isolated DCDC converter -> Buck regulator -> LDO -> filter -> Output switch -> current sensor -> Cell output
+
+    Control:
+    Digital isolator (i2c) ->
+        - ADC current sense
+        - ADC voltage sense (buck)
+        - ADC voltage sense (LDO)
+        - gpio output (switch)
+        - DAC (buck)
+        - DAC (LDO)
+
+    Parts list:
+        gpio expander: TCA6408ARGTR (0x20/0x21)
+        DAC: MCP4725A0T-E/CH
+        ADC: ADS1115IDGSR
+        Digital isolator: ISO1640BDR
+        Output relay: HFD4/5-SR
+        Buck regulator: TPS563201DDCR
+        LDO: TLV75901PDRVR
+        Addressable leds: SK6805
+    """
+    # External interfaces
+    power_in = new Power
+    power_out = new Power
+    power_5v = new Power # micro gnd referenced rail 
+    power_isolator = new Power # power for digital isolators
+    dmm_out = new Power
+    i2c = new I2C
+    cell_up = new CellJumper
+    cell_down = new CellJumper
+    signal dmm_relay_enable
+
+    #Output specs
+    power_out.voltage &= 0V to 5V
+    power_out.current -= 300mA
+
+    # Internal interfaces
+    _power_5v = new Power
+    _power_3v3 = new Power
+    _iso_i2c = new I2C
+
+    isolated_converter = new B1205S_2WR2
+    adc = new ADS1115IDGSR
+    buck = new DigitalBuck
+    ldo = new DigitalLDO
+    current_sense = new CurrentSensor
+    output_relay = new Relay
+    dmm_relay = new Relay
+    gpio = new TCA6408ARGTR
+    filter = new PiFilter
+    digital_isolator = new ISO1640BDR
+    voltage_led = new SK6805EC20
+    current_led = new SK6805EC20
+    load_switch = new LowSideSwitch
+    load_resistor = new Resistor
+
+    # addresses:
+    adc.address = "0x48"
+    buck.address = "0x61"
+    ldo.address = "0x60"
+    gpio.address = "0x20"
+    current_sense.address = "0x21"
+
+    # Power LEDs
+    power_5v ~ voltage_led.power
+    power_5v ~ current_led.power
+
+    # Connect LEDs
+    cell_down.led_data ~ current_led.din.io
+    current_led.dout.io ~ voltage_led.din.io
+    voltage_led.dout.io ~ cell_up.led_data
+
+    # Jumper connections
+    cell_up.cell ~ filter.power_out.vcc
+    cell_down.cell ~ filter.power_out.gnd
+
+    # Digital i2c isolator
+    i2c ~ digital_isolator.i2c_non_isolated
+    digital_isolator.i2c_isolated ~ _iso_i2c
+
+    # Connect I2C to devices
+    _iso_i2c ~ adc.i2c
+    _iso_i2c ~ buck.i2c
+    _iso_i2c ~ ldo.i2c
+    _iso_i2c ~ gpio.i2c
+
+    # Internal rails
+    internal_ldo = new LDK220M_R
+    _power_5v ~ internal_ldo.power_in
+    internal_ldo.power_out ~ _power_3v3
+
+    # Pi Filter
+    filter.C1.value = 10uF +/- 10%
+    filter.C1.package = "0805"
+    filter.L1 -> YNR4030_101M
+    filter.C2.value = 10uF +/- 10%
+    filter.C2.package = "0805"
+
+    # Current sense config
+    current_sense.current = 0.5A
+    current_sense.shunt.value = 100mohm +/- 10%
+
+    # Power devices
+    power_isolator ~ digital_isolator.power_non_isolated
+    _power_3v3 ~ adc.power
+    _power_3v3 ~ digital_isolator.power_isolated
+    _power_3v3 ~ buck.power_3v3
+    _power_3v3 ~ ldo.power_3v3
+    _power_3v3 ~ gpio.power
+    _power_3v3 ~ current_sense.power
+    _power_5v ~ output_relay.power_5v
+    power_5v ~ dmm_relay.power_5v # powered from Micro 5V rail
+
+    #TODO: do the math in ato
+    # Buck config: vout = 5v when vctrl = 0V, vout = 0V when vctrl = 3.3V
+    buck.power_out.voltage &= 0V to 5V
+    buck.feedback_div.r_top.value = 37kohm +/- 2%
+    buck.feedback_div.r_bottom.value = 10kohm +/- 2%
+    buck.ctrl_resistor.value = 24kohm +/- 2%
+
+    #TODO: do the math in ato
+    # LDO config: vout = 5v when vctrl = 0V, vout = 0V when vctrl = 3.3V
+    ldo.feedback_div.r_top.value = 60kohm +/- 2%
+    ldo.feedback_div.r_bottom.value = 10kohm +/- 2%
+    ldo.ctrl_resistor.value = 43kohm +/- 2%
+
+
+    # Connect Cell components
+    power_in ~ isolated_converter.power_in
+    isolated_converter.power_out ~ _power_5v
+    _power_5v ~ buck.power_in
+    buck.power_out ~ ldo.power_in
+    ldo.power_out ~ filter.power_in
+    filter.power_out ~ current_sense.power_in
+    current_sense.power_out ~ output_relay.power_in
+    output_relay.power_out ~ power_out
+
+    ldo.power_out ~ load_switch.power_in
+
+    # dmm relay
+    dmm_i_lim_resistors = new SeriesPowerResistors
+    current_sense.power_out ~ dmm_relay.power_in
+    dmm_relay.power_out ~ dmm_i_lim_resistors.power_in
+    dmm_i_lim_resistors.power_out ~ dmm_out
+    dmm_relay_enable ~ dmm_relay.input
+
+    # ADC connections
+    adc.AIN0 ~ buck.power_out.vcc
+    adc.AIN1 ~ ldo.power_out.vcc
+    adc.AIN2 ~ power_out.vcc
+    adc.AIN3 ~ current_sense.output
+
+    # GPIO expander
+    gpio.P2 ~ buck.enable
+    gpio.P3 ~ ldo.enable
+    gpio.P4 ~ load_switch.control
+
+# Custom interface for connecting the cells together
+interface CellJumper:
+    signal cell
+    signal led_data

elec/src/current-sensor.ato

@@ -0,0 +1,49 @@
+from "generics/interfaces.ato" import Power
+from "generics/resistors.ato" import Resistor
+
+module CurrentSensor:
+    sensor = new INA185A2IDRLR
+    shunt = new Resistor
+    power = new Power
+    power_in = new Power
+    power_out = new Power
+    signal output ~ sensor.out
+    current: current
+
+    power_in.current += power_out.current
+    power_in.voltage &= power_out.voltage - power_in.current * shunt.value
+
+    # Shunt config
+    assert shunt.value * current * sensor.gain within 1.2V to 3V
+    shunt.package = "0805"
+
+    # Shunt connections
+    power_in.vcc ~ shunt.p1; shunt.p2 ~ power_out.vcc
+    power_in.gnd ~ power_out.gnd
+
+    # Sensor connections
+    sensor.input.p ~ shunt.p1
+    sensor.input.n ~ shunt.p2
+
+    sensor.ref ~ power_in.gnd
+
+    # Power connections
+    power ~ sensor.power
+
+component INA185A2IDRLR:
+    # component NTZD3154NT1G
+    footprint = "SOT-563_L1.6-W1.2-P0.50-LS1.6-TL"
+    lcsc_id = "C2059320"
+    mpn = "C2059320"
+    gain = 50
+
+    power = new Power
+    power.vcc ~ pin 6
+    power.gnd ~ pin 2
+
+    signal out ~ pin 1
+    signal ref ~ pin 5
+
+    input = new DiffPair
+    input.p ~ pin 3
+    input.n ~ pin 4