2 layers156.8 × 67.3 mm
YM2151 STM32 VGM
AidanHockey5/YM2151_VGM_STM32
A hardware arcade video game music player based on the STM32 platform driving a YM2151
52 parts81AGPL-3.0
2 layers27.9 × 27.6 mm
Radius
tcr/radiusA cheap (in quality) and cheap (in dollars) USB comms adapter: 10 pins of SPI/I2C/UART/GPIO.
- Size
- 27.9 × 27.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 20
- Pads
- 76
- Tracks, vias
- 270, 31
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 2 May 2015
- Updated
- 21 Jul 2015
Overview
Radius is an open-source printed circuit board by tcr, from the tcr/radius repository on GitHub. It is a 2-layer board of 27.9 × 27.6 mm with 12 parts on 20 nets, routed with 270 tracks and 31 vias.
It is built around the STM8S003F3P6, CH340G and LD1117. Its parts include 5 capacitors, 3 ICs, 3 connectors and 1 crystal. It belongs with the interfaces and adapters boards and the STM8 boards of this library.
Main components
3
STM8S003F3P6
TSSOP-20-40℃~+85℃ 10bit 128Byte 16 16MHz 1KB 2.95V~5.5V 8 Bit 8KB Built-in FLASH STM8 TSSOP-20 Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
CH340G
SOP-16-40℃~+85℃ 2Mbps 3.3V、5V USB 2.0 USB to UART SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB ConvertersLD1117
UncategorisedSTMicroelectronics
README
README.mdradius
testing
make
make flash
make testIf OS X reports contention for your device:
sudo kextunload -b com.apple.driver.AppleUSBCardReader
sudo kextunload -b com.apple.iokit.IOUSBMassStorageClassparts
| Designator(s) | Quantity | Description | Part Number |
|---|---|---|---|
| IC1 | 1 | STM8S 8-bit micro (TSSOP-20) | STM8S003F3P6 |
| P2 | 1 | 10-pin right-angled header, .1" Pitch | PPTC101LGBN-RC |
| U1 | 1 | Full speed USB <-> 9-pin Serial (SOP-16) | CH340G |
| U2 | 1 | 3.3V Regulator (SO-8) | LD1117D33CTR |
| Y1 | 1 | 12Mhz Crystal | NX3225SA |
| C1 | 1 | 0.1 uF (0603) | ... |
| C2 | 1 | 10 uF (0603) | ... |
| C3 | 1 | 1 μF polarized (0603) | ... |
| C4, C5 | 2 | 20 pF (0603) | ... |
pin mapping
- GND
- 3.3V
- SCL - PB4
- SDA - PB5
- SCK - PC5
- MISO - PC7
- MOSI - PC6
- TXD - PD2
- RXD - PD0
- G3 - PD1
USB:
- TXD - PD6
- RXD - PD5
docs
Reference manual: http://www.st.com/web/en/resource/technical/document/reference_manual/CD00190271.pdf
- SPI: http://www.st.com/web/en/resource/technical/document/reference_manual/CD00190271.pdf#page=259
- I2C: http://www.st.com/web/en/resource/technical/document/reference_manual/CD00190271.pdf#page=285
- GPIO: http://www.st.com/web/en/resource/technical/document/reference_manual/CD00190271.pdf#page=106
- UART: http://www.st.com/web/en/resource/technical/document/reference_manual/CD00190271.pdf#page=318
CPU reference: http://www.st.com/web/en/resource/technical/document/programming_manual/CD00161709.pdf
Product Datasheet: http://www.st.com/web/en/resource/technical/document/datasheet/DM00024550.pdf
- Memory map: http://www.st.com/web/en/resource/technical/document/datasheet/DM00024550.pdf#page=32
- Pin map: http://www.st.com/web/en/resource/technical/document/datasheet/DM00024550.pdf#page=22
Errata: http://postar.sino-star.com/public/uploads/20120214161049_871.pdf
CH340G
Datasheet: http://www.seeedstudio.com/wiki/images/7/7c/CH340DS1_EN.PDF
tools
https://github.com/vdudouyt/stm8flash
brew install sdcchttp://www.colecovision.eu/stm8/128-EVAL%20Dhrystone.shtml
how it works
interrupts are priority-based outputs in 64 byte packets. priority output is real time input of "uniterruptable streams", specifically i2c read (max 920Khz) and uart input (max 18400bps) simultaneously
also note that i2c can stretch clock lines so really it's only uart interrupts
there are many buffers, but this one is mine(d) for its outputting content. all packets block on new input until it's swapped for the outputting. so buffers must clean faster than they collectively are filled for uninterruptable streams (and acks).
output from radius is asap and dumped into its buffers. simple packet id + NACK/ACK acknowledgement byte on the usb line.
ID0 + NACK/ACK ID1 + LEN + <=64 byte packet
input? it is 64 byte packets. wait for an nack, then resend, or continue
LEN + <=64 byte packet
input is synced at start by waiting for an 'R' on both sides
packets are USB-style repeated until a 0 length packet or < 64 length packet is received
license
MIT/ASL2
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 20 pF | Capacitors_SMD:C_0603_HandSoldering | C4, C5 |
| 1 | 1 μF | Capacitors_SMD:C_0603_HandSoldering | C3 |
| 1 | 10 µF | Capacitors_SMD:C_0603_HandSoldering | C1 |
| 1 | 100 nF | Capacitors_SMD:C_0603_HandSoldering | C2 |
| 1 | CH340G | SMD_Packages:SO-16-N | U1 |
| 1 | CONN_01X04 | usbpcb:USB-A-PCB | P1 |
| 1 | CONN_01X04 | radius:RADIUS-CONN-2MM-M-1x4 | P3 |
| 1 | CONN_01X10 | Socket_Strips:Socket_Strip_Angled_1x10 | P2 |
| 1 | Crystal | Crystals:Crystal_SMD_0603_4Pads | Y1 |
| 1 | LD1117 | Power_Integrations:SO-8 | U2 |
| 1 | STM8S003F3P | Housings_SSOP:TSSOP-20_4.4x6.5mm_Pitch0.65mm | IC1 |
Questions
How big is the Radius PCB?
It measures 27.9 × 27.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Radius use?
12 parts, built around the STM8S003F3P6, CH340G and LD1117. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Radius KiCad files?
From the tcr/radius repository on GitHub, at the commit this page was made from: the board is board/radius.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Radius design in my own project?
Its repository states no licence, so its author keeps all rights: ask tcr before reusing the design.
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