Initial project scaffold for CH9350-STM32 USB HID to UART bridge
This commit is contained in:
Xiaofeng Guo
325
elec/src/ch9350-stm32.ato
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325
elec/src/ch9350-stm32.ato
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import Power from "generics/interfaces.ato"
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import UART from "generics/interfaces.ato"
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import USB2 from "generics/interfaces.ato"
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import SWD from "generics/interfaces.ato"
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import Pair from "generics/interfaces.ato"
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import Capacitor from "generics/capacitors.ato"
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import Resistor from "generics/resistors.ato"
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import Oscillator from "generics/oscillators.ato"
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# ============================================================
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# CH9350 - USB HID to UART Bridge
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# ============================================================
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component CH9350_IC:
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mpn = "CH9350L"
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footprint = "Package_QFP:LQFP-48_7x7mm_P0.5mm"
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package = "LQFP-48"
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# Power
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signal vcc ~ pin 1
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signal gnd ~ pin 2
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gnd ~ pin 13
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gnd ~ pin 20
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signal v33 ~ pin 3
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# USB
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signal udm ~ pin 9
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signal udp ~ pin 10
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# Crystal (12MHz)
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signal xi ~ pin 11
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signal xo ~ pin 12
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# UART
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signal txd ~ pin 18
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signal rxd ~ pin 19
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# Control
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signal rst_n ~ pin 4
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signal act ~ pin 5
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# Mode/Config
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signal mode0 ~ pin 16
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signal mode1 ~ pin 17
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signal cfg0 ~ pin 22
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signal cfg1 ~ pin 23
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signal cfg2 ~ pin 24
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module CH9350:
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ic = new CH9350_IC
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# Power Interface
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power = new Power
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power.vcc ~ ic.vcc
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power.gnd ~ ic.gnd
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# USB Interface
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usb = new USB2
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usb.dp ~ ic.udp
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usb.dm ~ ic.udm
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usb.gnd ~ power.gnd
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# UART Interface
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uart = new UART
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uart.tx ~ ic.txd
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uart.rx ~ ic.rxd
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uart.gnd ~ power.gnd
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# V33 LDO decoupling
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c_v33 = new Capacitor
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c_v33.value = 1uF +/- 20%
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c_v33.package = "0402"
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ic.v33 ~ c_v33.p1; c_v33.p2 ~ power.gnd
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# 12 MHz crystal oscillator
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osc = new Oscillator
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osc.crystal.footprint = "Crystal-SMD_L5.0-W3.2"
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osc.crystal.mpn = "12MHz-Crystal-SMD-3225"
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osc.load_cap_1.value = 22pF +/- 20%
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osc.load_cap_2.value = 22pF +/- 20%
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ic.xi ~ osc.xin.io
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ic.xo ~ osc.xout.io
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osc.gnd ~ power.gnd
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# Power decoupling
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c_dec_1 = new Capacitor
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c_dec_1.value = 100nF +/- 20%
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c_dec_1.package = "0402"
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ic.vcc ~ c_dec_1.p1; c_dec_1.p2 ~ power.gnd
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c_dec_2 = new Capacitor
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c_dec_2.value = 10uF +/- 20%
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c_dec_2.package = "0603"
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ic.vcc ~ c_dec_2.p1; c_dec_2.p2 ~ power.gnd
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# RESET pull-up (active low)
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r_rst = new Resistor
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r_rst.value = 10kohm +/- 20%
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r_rst.package = "0402"
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ic.rst_n ~ r_rst.p1; r_rst.p2 ~ power.vcc
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# ACT LED indicator
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r_act = new Resistor
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r_act.value = 1kohm +/- 20%
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r_act.package = "0402"
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signal act_led
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# Mode/Config default: UART mode, auto-detect
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r_mode0 = new Resistor
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r_mode0.value = 10kohm +/- 20%
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r_mode0.package = "0402"
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ic.mode0 ~ r_mode0.p1; r_mode0.p2 ~ power.gnd
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r_mode1 = new Resistor
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r_mode1.value = 10kohm +/- 20%
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r_mode1.package = "0402"
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ic.mode1 ~ r_mode1.p1; r_mode1.p2 ~ power.gnd
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r_cfg0 = new Resistor
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r_cfg0.value = 10kohm +/- 20%
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r_cfg0.package = "0402"
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ic.cfg0 ~ r_cfg0.p1; r_cfg0.p2 ~ power.gnd
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r_cfg1 = new Resistor
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r_cfg1.value = 10kohm +/- 20%
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r_cfg1.package = "0402"
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ic.cfg1 ~ r_cfg1.p1; r_cfg1.p2 ~ power.gnd
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r_cfg2 = new Resistor
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r_cfg2.value = 10kohm +/- 20%
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r_cfg2.package = "0402"
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ic.cfg2 ~ r_cfg2.p1; r_cfg2.p2 ~ power.gnd
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# ============================================================
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# STM32F103C8T6 - ARM Cortex-M3 Microcontroller
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# ============================================================
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component STM32F103C8T6:
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mpn = "STM32F103C8T6"
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footprint = "Package_QFP:LQFP-48_7x7mm_P0.5mm"
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package = "LQFP-48"
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# Power
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signal vbat ~ pin 1
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signal vdd_1 ~ pin 9
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signal vss_1 ~ pin 8
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signal vdd_2 ~ pin 24
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signal vss_2 ~ pin 23
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signal vdd_3 ~ pin 36
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signal vss_3 ~ pin 35
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signal vdd_4 ~ pin 48
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signal vss_4 ~ pin 47
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# HSE Crystal (8 MHz)
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signal osc_in ~ pin 5
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signal osc_out ~ pin 6
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# LSE Crystal (32.768 kHz)
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signal osc32_in ~ pin 3
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signal osc32_out ~ pin 4
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# Reset and Boot
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signal nrst ~ pin 7
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signal boot0 ~ pin 44
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# SWD Debug
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signal swdio ~ pin 34
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signal swclk ~ pin 37
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# USART1 (connected to CH9350)
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signal pa9_tx ~ pin 30
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signal pa10_rx ~ pin 31
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# User LED (PC13)
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signal pc13 ~ pin 2
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module STM32F103_Minimal:
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mcu = new STM32F103C8T6
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# Power Interface
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power = new Power
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power.gnd ~ mcu.vss_1
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power.gnd ~ mcu.vss_2
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power.gnd ~ mcu.vss_3
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power.gnd ~ mcu.vss_4
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# VDD Decoupling - one 100nF per VDD pin
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c_d1 = new Capacitor
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c_d1.value = 100nF +/- 20%
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c_d1.package = "0402"
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mcu.vdd_1 ~ c_d1.p1; c_d1.p2 ~ power.gnd
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c_d2 = new Capacitor
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c_d2.value = 100nF +/- 20%
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c_d2.package = "0402"
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mcu.vdd_2 ~ c_d2.p1; c_d2.p2 ~ power.gnd
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c_d3 = new Capacitor
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c_d3.value = 100nF +/- 20%
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c_d3.package = "0402"
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mcu.vdd_3 ~ c_d3.p1; c_d3.p2 ~ power.gnd
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c_d4 = new Capacitor
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c_d4.value = 100nF +/- 20%
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c_d4.package = "0402"
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mcu.vdd_4 ~ c_d4.p1; c_d4.p2 ~ power.gnd
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# Bulk decoupling
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c_bulk = new Capacitor
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c_bulk.value = 10uF +/- 20%
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c_bulk.package = "0603"
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mcu.vdd_1 ~ c_bulk.p1; c_bulk.p2 ~ power.gnd
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# VDDA filtering
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c_vdda = new Capacitor
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c_vdda.value = 100nF +/- 20%
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c_vdda.package = "0402"
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mcu.vdd_1 ~ c_vdda.p1; c_vdda.p2 ~ power.gnd
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# 0R jumper for VDDA
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r_vdda = new Resistor
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r_vdda.value = 0ohm
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r_vdda.package = "0402"
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mcu.vdd_1 ~ r_vdda.p1; power.vcc ~ r_vdda.p2
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# VBAT
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c_vbat = new Capacitor
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c_vbat.value = 100nF +/- 20%
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c_vbat.package = "0402"
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mcu.vbat ~ c_vbat.p1; c_vbat.p2 ~ power.gnd
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mcu.vbat ~ power.vcc
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# HSE: 8 MHz external oscillator
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hse = new Oscillator
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hse.crystal.footprint = "Crystal-SMD_L5.0-W3.2"
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hse.crystal.mpn = "8MHz-Crystal-SMD-3225"
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hse.load_cap_1.value = 22pF +/- 20%
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hse.load_cap_2.value = 22pF +/- 20%
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mcu.osc_in ~ hse.xin.io
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mcu.osc_out ~ hse.xout.io
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hse.gnd ~ power.gnd
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# LSE: 32.768 kHz oscillator for RTC
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lse = new Oscillator
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lse.crystal.footprint = "Crystal-SMD_L3.2-W1.5"
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lse.crystal.mpn = "32.768kHz-Crystal-SMD-3215"
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lse.load_cap_1.value = 12pF +/- 20%
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lse.load_cap_2.value = 12pF +/- 20%
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mcu.osc32_in ~ lse.xin.io
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mcu.osc32_out ~ lse.xout.io
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lse.gnd ~ power.gnd
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# NRST: pull-up to VCC
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r_nrst = new Resistor
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r_nrst.value = 10kohm +/- 20%
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r_nrst.package = "0402"
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mcu.nrst ~ r_nrst.p1; r_nrst.p2 ~ power.vcc
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# NRST decoupling
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c_nrst = new Capacitor
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c_nrst.value = 100nF +/- 20%
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c_nrst.package = "0402"
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mcu.nrst ~ c_nrst.p1; c_nrst.p2 ~ power.gnd
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# BOOT0: pull-down to GND (boot from flash)
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r_boot0 = new Resistor
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r_boot0.value = 10kohm +/- 20%
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r_boot0.package = "0402"
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mcu.boot0 ~ r_boot0.p1; r_boot0.p2 ~ power.gnd
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# SWD interface
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swd = new SWD
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swd.swdio ~ mcu.swdio
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swd.swclk ~ mcu.swclk
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swd.swo ~ power.gnd
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swd.gnd ~ power.gnd
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# UART interface to CH9350
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uart = new UART
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uart.tx ~ mcu.pa9_tx
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uart.rx ~ mcu.pa10_rx
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uart.gnd ~ power.gnd
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# User LED on PC13 (active low, open-drain)
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r_led = new Resistor
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r_led.value = 510ohm +/- 20%
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r_led.package = "0402"
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signal user_led_anode
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# ============================================================
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# Top-level Application
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# ============================================================
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module App:
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ch9350 = new CH9350
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stm32 = new STM32F103_Minimal
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# Shared power rail
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power = new Power
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power.vcc ~ ch9350.power.vcc
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power.vcc ~ stm32.power.vcc
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power.gnd ~ ch9350.power.gnd
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power.gnd ~ stm32.power.gnd
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# CH9350 UART -> STM32 USART1 (cross-connected)
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ch9350.uart.tx ~ stm32.uart.rx
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ch9350.uart.rx ~ stm32.uart.tx
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ch9350.uart.gnd ~ stm32.uart.gnd
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# CH9350 USB goes to PC
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usb = new USB2
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usb.dp ~ ch9350.usb.dp
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usb.dm ~ ch9350.usb.dm
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usb.gnd ~ power.gnd
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# Top-level SWD interface for programming/debug
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swd = new SWD
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swd.swdio ~ stm32.swd.swdio
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swd.swclk ~ stm32.swd.swclk
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swd.gnd ~ power.gnd
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