{ "ok": true, "data": { "title": "KR-0001", "rev_id": 13009, "updated_at": "2023-04-18T07:36:54+00:00", "chunk_count": 13, "chunks": [ { "title": "KR-0001", "rev_id": 13009, "heading_path": "", "chunk_index": 0, "content": "# KR-0001", "char_count": 9, "token_estimate": 3 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "ROCK 4 Model SE Starter Kit", "chunk_index": 1, "content": "
\n\"主图1.jpg\"\n
主图1.jpg<\/figcaption>\n<\/figure>\n\n- Purchase URL \\[ \\]", "char_count": 312, "token_estimate": 88 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Descriptions", "chunk_index": 2, "content": "ROCK 4 SE Starter Kit contains heatsinks, adjustable speed fan, acrylic shield and ROCK 4 SE development board.\n\nThis is the documentation for ROCK Pi 4, written by Radxa Team with community contributions.\n\nROCK Pi 4 is a Rockchip RK3399 based SBC(Single Board Computer) by Radxa. It can run android or some Linux distributions. ROCK Pi 4 features a six core ARM processor, 64bit dual channel 3200Mb\/s LPDDR4, up to 4K@60 HDMI, MIPI DSI, MIPI CSI, 3.5mm jack with mic, 802.11 ac WIFI, BT 5.0, USB Port, GbE LAN, 40-pin color expansion header, RTC. Also, ROCK Pi 4 supports USB PD and QC powering.\n\nROCK Pi 4 comes in two models, Model A and Model B, each model has 1GB, 2GB or 4GB ram options. for detailed difference of Model A and Model B, please check Specifications.", "char_count": 770, "token_estimate": 193 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Features", "chunk_index": 3, "content": "| Model | ROCK 4 SE |\n|-----------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Processor | 64bits hexa core processor Rockchip RK3399-T Dual Cortex-72, frequency 1.5GHz with qual Cortex-A53, frequency 1.0GHz Mali T860MP4 gpu, support OpenGL ES 1.1\/2.0\/3.0\/3.1\/3.2, Vulkan 1.0, Open CL 1.1 1.2, DX11. |\n| Memory | LPDDR4 64bit dual channel LPDDR4@3200Mb\/s, 1GB\/2GB\/4GB optioal |\n| Storage | eMMC connector, μSD card (μSD slot supports up to 256 GB μSD card), M.2 SSD (M.2 connector supports up to 2T M2 NVME SSD) |\n| Display | Standard HDMI 2.", "char_count": 1155, "token_estimate": 289 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Features", "chunk_index": 4, "content": "0 up to 4k@60 MIPI DSI 2 lanes via FPC connector HDMI and MIPI DSI can work at the same time, support mirror mode or extend mode. |\n| Audio | 3.5mm jack with mic HD codec that supports up to 24-bit\/96KHz audio. |\n| Camera | MIPI CSI 2 lanes via FPC connector, support up to 800 MP camera(1mm pitch connector). |\n| Wireless | 802.11 ac wifi BT 5.0 with on board antenna |\n| USB | GbE LAN with Power over Ethernet (PoE) support additional HAT is required for powering from PoE |", "char_count": 1094, "token_estimate": 274 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Features", "chunk_index": 5, "content": "| IO | 40-pin expansion header, 2 x UART ,2 x SPI bus, 3 x I2C bus, 1 x PCM\/I2S, 1 x SPDIF, 2 x PWM, 1 x ADC, 6 x GPIO, 2 x 5V DC power in, 2 x 3.3V DC power in |\n| Others | RTC RTC battery connector for time backup(optional) |\n| Power | USB PD, support USB Type C PD 2.0, 9V\/2A, 12V\/2A. Qualcomm® Quick ChargeTM: Supports QC 3.0\/2.0 adapter, 9V\/2A, 12V\/1.5A |\n| Size | 85mm x 54mm |", "char_count": 899, "token_estimate": 225 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Gallery", "chunk_index": 6, "content": "- Product Outlook\n\n| | |\n|--------------------------------------------------------------------------------|--------------------------------------------------------------------------------|\n|
\n \"Rock4se1.jpg\"\n
Rock4se1.jpg<\/figcaption>\n <\/figure> |
\n \"Rock4se2.jpg\"\n
Rock4se2.jpg<\/figcaption>\n <\/figure> |", "char_count": 1053, "token_estimate": 264 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Gallery > Specifications", "chunk_index": 7, "content": "- Port definitions\n\n\"KR-0001-接口信息jpg.jpg\"\n\\* GPIO definitions \"KR-0001-引脚.jpg\"\n\\* Adjustable speed fan detials \"KR-0001-4007.jpg\"", "char_count": 349, "token_estimate": 110 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Gallery > How to assemble", "chunk_index": 8, "content": "- Installation Steps\n\n\"KR-0001-安装.jpg\"\n\\* Wiring Fan detials \"KR-0001-接线.jpg\"\n\nNOTE: Please pay attention to the polarity. more detials about gpio please refer to: https:\/\/wiki.radxa.com\/Rockpi4\/hardware\/gpio\n\n- Heat dissipation effect\n\n[ left \\|800px](File:KR-0001-降温.jpg \"wikilink\")\n==How to control fan speed via PWM signal==\n\n- Install Libmraa: \n- modiy \/boot\/hw_intfc.conf,if use spi1,must disable uart4,if use spi2,disable i2c6.follow:\n\n\n\n# Hardware Interface Config\n\n# For more details, check https:\/\/wiki.radxa.com\/Rockpi4\/hardware\/devtree_overlays.\n\n# Set \"on\" to enable the optional hardware interfaces while set \"off\" to disablee\n\nintfc:pwm0=on\n intfc:pwm1=on\n intfc:uart2=off\n intfc:uart4=off\n intfc:spi1=off\n intfc:spi2=off\n intfc:i2c2=off\n intfc:i2c6=off\n intfc:i2c7=off", "char_count": 1020, "token_estimate": 273 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Gallery > How to assemble", "chunk_index": 9, "content": "Use c program in \/usr\/local\/share\/mraa\/examples\/c\/pwm.c to test: Modify the macro PWM in \/usr\/local\/share\/mraa\/examples\/c\/pwm.c as follows to test PWM0. To test PWM1, change \\#define PWM 11 to \\#define PWM 13.\n\n<\/pre>\n\n\/\\* PWM declaration \\*\/\n\n1. define PWM 11\n\n<\/pre>\n\nsave and compile pwm.c\n\nroot@rockpi-4b:\/usr\/local\/share\/mraa\/examples\/c# gcc -o pwm pwm.c -lmraa\n\nrun the program:\n\nroot@rockpi-4b:\/usr\/local\/share\/mraa\/examples\/c# .\/pwm\n\nThen the fan will change speed and spinning, you can modify \/usr\/local\/share\/mraa\/examples\/c\/pwm.c to meet actual usage requirements.", "char_count": 576, "token_estimate": 144 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Package Includes", "chunk_index": 10, "content": "- 1 x ROCK 4 SE Starter Kit\n\n\"KR-0001-清单2.jpg\"", "char_count": 118, "token_estimate": 37 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Documentations", "chunk_index": 11, "content": "- Getting Start: \n- Flashing Tool: \n- Troubleshooting: Post your issue on the forum: \n- Installation: \n- Hardware: \n- Development Guide: \n- Downloads: \n- FAQs: ", "char_count": 503, "token_estimate": 126 }, { "title": "KR-0001", "rev_id": 13009, "heading_path": "Keywords", "chunk_index": 12, "content": "- ROCK 4 Model SE, ROCK 4, ROCK Pi 4, Starter kit.", "char_count": 52, "token_estimate": 13 } ] } }