{"id":32029759,"url":"https://github.com/libdriver/pca9548a","last_synced_at":"2026-04-20T14:02:32.502Z","repository":{"id":318670482,"uuid":"1072172124","full_name":"libdriver/pca9548a","owner":"libdriver","description":"PCA9548A full-featured driver library for general-purpose MCU and Linux.","archived":false,"fork":false,"pushed_at":"2025-10-26T01:30:03.000Z","size":2820,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2025-10-26T03:26:48.507Z","etag":null,"topics":["c","full-featured-driver","iic","linux","mcu","pca9548a","switch"],"latest_commit_sha":null,"homepage":"https://www.libdriver.com","language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/libdriver.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGELOG.md","contributing":"CONTRIBUTING.md","funding":null,"license":"LICENSE","code_of_conduct":"CODE_OF_CONDUCT.md","threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":"SECURITY.md","support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2025-10-08T11:04:18.000Z","updated_at":"2025-10-26T01:29:34.000Z","dependencies_parsed_at":"2025-10-08T15:31:02.679Z","dependency_job_id":null,"html_url":"https://github.com/libdriver/pca9548a","commit_stats":null,"previous_names":["libdriver/pca9548a"],"tags_count":1,"template":false,"template_full_name":null,"purl":"pkg:github/libdriver/pca9548a","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/libdriver%2Fpca9548a","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/libdriver%2Fpca9548a/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/libdriver%2Fpca9548a/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/libdriver%2Fpca9548a/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/libdriver","download_url":"https://codeload.github.com/libdriver/pca9548a/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/libdriver%2Fpca9548a/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":32050451,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-04-20T11:35:06.609Z","status":"ssl_error","status_checked_at":"2026-04-20T11:34:48.899Z","response_time":94,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.6:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["c","full-featured-driver","iic","linux","mcu","pca9548a","switch"],"created_at":"2025-10-16T18:48:11.938Z","updated_at":"2026-04-20T14:02:32.496Z","avatar_url":"https://github.com/libdriver.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"[English](/README.md) | [ 简体中文](/README_zh-Hans.md) | [繁體中文](/README_zh-Hant.md) | [日本語](/README_ja.md) | [Deutsch](/README_de.md) | [한국어](/README_ko.md)\n\n\u003cdiv align=center\u003e\n\u003cimg src=\"/doc/image/logo.svg\" width=\"400\" height=\"150\"/\u003e\n\u003c/div\u003e\n\n## LibDriver PCA9548A\n\n[![MISRA](https://img.shields.io/badge/misra-compliant-brightgreen.svg)](/misra/README.md) [![API](https://img.shields.io/badge/api-reference-blue.svg)](https://www.libdriver.com/docs/pca9548a/index.html) [![License](https://img.shields.io/badge/license-MIT-brightgreen.svg)](/LICENSE)\n\nThe PCA9548A is an octal bidirectional translating switch controlled via the I2C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register. An active LOW reset input allows the PCA9548A to recover from a situation where one of the downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-bus state machine and causes all the channels to be deselected as does the internal Power-on reset function. The pass gates of the switches are constructed such that the VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9548A. This allows the use of different bus voltages on each pair, so that 1.8 V or 2.5 V or 3.3 V parts can communicate with 5 V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 6 V tolerant.\n\nLibDriver PCA9548A is a full-featured driver for PCA9548A, launched by LibDriver.It provides I2C channel switching, I2C writing, I2C reading and additional features. LibDriver is MISRA compliant.\n\n### Table of Contents\n\n  - [Instruction](#Instruction)\n  - [Install](#Install)\n  - [Usage](#Usage)\n    - [example basic](#example-basic)\n  - [Document](#Document)\n  - [Contributing](#Contributing)\n  - [License](#License)\n  - [Contact Us](#Contact-Us)\n\n### Instruction\n\n/src includes LibDriver PCA9548A source files.\n\n/interface includes LibDriver PCA9548A IIC platform independent template.\n\n/test includes LibDriver PCA9548A driver test code and this code can test the chip necessary function simply.\n\n/example includes LibDriver PCA9548A sample code.\n\n/doc includes LibDriver PCA9548A offline document.\n\n/datasheet includes PCA9548A datasheet.\n\n/project includes the common Linux and MCU development board sample code. All projects use the shell script to debug the driver and the detail instruction can be found in each project's README.md.\n\n/misra includes the LibDriver MISRA code scanning results.\n\n### Install\n\nReference /interface IIC platform independent template and finish your platform IIC driver.\n\nAdd the /src directory, the interface driver for your platform, and your own drivers to your project, if you want to use the default example drivers, add the /example directory to your project.\n\n### Usage\n\nYou can refer to the examples in the /example directory to complete your own driver. If you want to use the default programming examples, here's how to use them.\n\n#### example basic\n\n```C\n#include \"driver_pca9548a_basic.h\"\n\nuint8_t res;\nuint8_t i;\nuint8_t buf[8];\nuint8_t data = 0x00;\nuint8_t dev_addr = 0x00;\nuint16_t reg = 0x0000;\nuint16_t len = 1;\n\n/* basic init */\nres = pca9548a_basic_init(PCA9548A_ADDRESS_A000);\nif (res != 0)\n{\n    return 1;\n}\n\n...\n    \n/* set channel */\nres = pca9548a_basic_set_channel(PCA9548A_CHANNEL_0, PCA9548A_BOOL_TRUE);\nif (res != 0)\n{\n    (void)pca9548a_basic_deinit();\n\n    return 1;\n}\n\n...\n    \n/* iic read command */\nres = pca9548a_basic_iic_read_command(dev_addr, buf, len);\nif (res != 0)\n{\n    (void)pca9548a_basic_deinit();\n\n    return 1;\n}\npca9548a_interface_debug_print(\"pca9548a: device address 0x%02X.\\n\", dev_addr);\npca9548a_interface_debug_print(\"pca9548a: data is \");\nfor (i = 0; i \u003c len; i++)\n{\n    pca9548a_interface_debug_print(\"0x%02X \", buf[i]);\n}\npca9548a_interface_debug_print(\"\\n\");\n\n...\n\n/* iic read */\nres = pca9548a_basic_iic_read(dev_addr, reg \u0026 0xFF, buf, len);\nif (res != 0)\n{\n    (void)pca9548a_basic_deinit();\n\n    return 1;\n}\npca9548a_interface_debug_print(\"pca9548a: device address 0x%02X.\\n\", dev_addr);\npca9548a_interface_debug_print(\"pca9548a: register address 0x%02X.\\n\", reg);\npca9548a_interface_debug_print(\"pca9548a: data is \");\nfor (i = 0; i \u003c len; i++)\n{\n    pca9548a_interface_debug_print(\"0x%02X \", buf[i]);\n}\npca9548a_interface_debug_print(\"\\n\");    \n\n...\n\n/* iic read16 */\nres = pca9548a_basic_iic_read_address16(dev_addr, reg, buf, len);\nif (res != 0)\n{\n    (void)pca9548a_basic_deinit();\n\n    return 1;\n}\npca9548a_interface_debug_print(\"pca9548a: device address 0x%02X.\\n\", dev_addr);\npca9548a_interface_debug_print(\"pca9548a: register address 0x%04X.\\n\", reg);\npca9548a_interface_debug_print(\"pca9548a: data is \");\nfor (i = 0; i \u003c len; i++)\n{\n    pca9548a_interface_debug_print(\"0x%02X \", buf[i]);\n}\npca9548a_interface_debug_print(\"\\n\");  \n\n...\n\n/* iic write command */\nres = pca9548a_basic_iic_write_command(dev_addr, \u0026data, 1);\nif (res != 0)\n{\n    (void)pca9548a_basic_deinit();\n\n    return 1;\n}\npca9548a_interface_debug_print(\"pca9548a: device address 0x%02X.\\n\", dev_addr);\npca9548a_interface_debug_print(\"pca9548a: data is 0x%02X\\n\", data); \n\n...\n\n/* iic write */\nres = pca9548a_basic_iic_write(dev_addr, reg \u0026 0xFF, \u0026data, 1);\nif (res != 0)\n{\n    (void)pca9548a_basic_deinit();\n\n    return 1;\n}\npca9548a_interface_debug_print(\"pca9548a: device address 0x%02X.\\n\", dev_addr);\npca9548a_interface_debug_print(\"pca9548a: register address 0x%02X.\\n\", reg);\npca9548a_interface_debug_print(\"pca9548a: data is 0x%02X\\n\", data);    \n\n...\n\n/* iic write */\nres = pca9548a_basic_iic_write_address16(dev_addr, reg, \u0026data, 1);\nif (res != 0)\n{\n    (void)pca9548a_basic_deinit();\n\n    return 1;\n}\npca9548a_interface_debug_print(\"pca9548a: device address 0x%02X.\\n\", dev_addr);\npca9548a_interface_debug_print(\"pca9548a: register address 0x%04X.\\n\", reg);\npca9548a_interface_debug_print(\"pca9548a: data is 0x%02X\\n\", data);  \n\n...\n    \n/* basic deinit */\n(void)pca9548a_basic_deinit();\n\nreturn 0;\n```\n\n### Document\n\nOnline documents: [https://www.libdriver.com/docs/pca9548a/index.html](https://www.libdriver.com/docs/pca9548a/index.html).\n\nOffline documents: /doc/html/index.html.\n\n### Contributing\n\nPlease refer to CONTRIBUTING.md.\n\n### License\n\nCopyright (c) 2015 - present LibDriver All rights reserved\n\n\n\nThe MIT License (MIT) \n\n\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\n\nof this software and associated documentation files (the \"Software\"), to deal\n\nin the Software without restriction, including without limitation the rights\n\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n\ncopies of the Software, and to permit persons to whom the Software is\n\nfurnished to do so, subject to the following conditions: \n\n\n\nThe above copyright notice and this permission notice shall be included in all\n\ncopies or substantial portions of the Software. \n\n\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n\nSOFTWARE. \n\n### Contact Us\n\nPlease send an e-mail to lishifenging@outlook.com.","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flibdriver%2Fpca9548a","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flibdriver%2Fpca9548a","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flibdriver%2Fpca9548a/lists"}