https://e2echina.ti.com/support/wireless-connectivity/wifi/zh-CNTelligent Community 13https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1064776/cc3351-cc3351-nuttx-rtos-bp-cc3351/3841104Tue, 07 Apr 2026 03:49:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:cff170a1-d363-4b1e-adb9-10f628c57fb5Vivian Gao未收到后续回复。https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1064776/cc3351-cc3351-nuttx-rtos-bp-cc3351/3838534Mon, 30 Mar 2026 05:05:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:ed688691-7825-4fe5-8337-8b94f1247392Vivian Gao我不确定这在基本层面上是如何运作的，所以我需要进一步调查。但是，我确实看到IRQ引脚很高，这可能会导致CARD-BUSY状态。IRQ表示需要读取core_status寄存器（0x0000BFFC）。 使用SDIO有什么具体原因吗？https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1064776/cc3351-cc3351-nuttx-rtos-bp-cc3351/3833555Tue, 24 Mar 2026 08:58:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:a36c22ac-c24a-4708-8932-2a8b9bc2679aLydia您好， 已 经 收到了您的案例， 调查 需要些 时间 ，感 谢 您的耐心等待。https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1064776/cc3351-cc3351-nuttx-rtos-bp-cc3351Tue, 24 Mar 2026 07:01:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:f1c1649c-86e7-4d11-b0d3-8aa1bfa31aa8Austin ChenPart Number: CC3351 Hi TI team, 我們嘗試將 TI 的 STM32 MCU for RTOS 範例程式碼移植到我們的系統 (Nuttx) 上。 目前，我們可以運行到您的「獲取設備資訊」階段。 但會遇到 CRC error 以及 card busy 的問題，導致無法成功 briung up. 這是我們的設計流程，目前卡在Step3 會出現上面的 card busy 以及 CRC error ，請問流程是否有誤? 以下是邏輯分析儀工具，以及記錄檔 Ti_cc3351_分析檔案.zip 分析工具: ATK-Logic V1.1.1.8_x64.exe (檔案太大無法上傳?) 感謝您 AustinBP-CC3351无线基础设施CC3351https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054118/am2434-does-the-am2434-bp3351-development-board-combination-support-the-sdio-interface/3806408Mon, 09 Feb 2026 05:39:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:2fdf3a2d-a859-4d54-b3db-bd42ff009c4aLydiaHi, Our previous recommendation for the customer would be to implement the SDIO interface themselves (something many customers have successfully done with their own hosts) for the AM243x while using jumper wires to connect the proper pins between the AM243x and BP CC33x1 and being aware of the supported voltage levels for the SDIO pins. Another option (which we strongly recommend) would be for your customer to simply switch the product design to SPI, which is much easier integrate and set up between the AM243x and BP CC33x1. We also have guides for this to walk your customer through the process. If your customer's only option is to use SDIO but is willing to use a different host to talk to the BP CC33x1, we highly recommend your customer to use a Linux MPU host. Unfortunately, we currently cannot provide additional assistance (such as providing an SDIO example with the AM243x and BP CC33x1) without knowing more about your customer and your customer's goals.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3805192Fri, 06 Feb 2026 08:35:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:8dea0990-1650-4bdf-850a-d5784f844319Lydiafrom top to bottomhttps://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3805183Fri, 06 Feb 2026 07:54:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:6fcb73e0-5400-410c-a46d-90049b8cb19eBill GatesCan you resend the picture? The image cannot be loaded.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3805182Fri, 06 Feb 2026 07:23:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:c76996d4-24da-4df5-b5f3-6f686bbb4126LydiaIf you modify inside the MMCSD_init which is present in the System_init API - it will get overwritten - as that is generated code. You would need to create seperate files similar to the image: The files would also need to be added to the makefile of the example, so its compiled. Additionally, do make sure the MMCSD instance in that is opened in the default MCU+SDK flow is closed or removed such that there is no error in opening this instance. The init API in itself does not need modification, rather the configurations that are being used in the init: Along with above configurations, the pinmux is also configured seperately like below: Please verify the correct pinmux configurations from the AM243 Datasheet as SDIO is not tested.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054118/am2434-does-the-am2434-bp3351-development-board-combination-support-the-sdio-interface/3805179Fri, 06 Feb 2026 06:55:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:bb0a5c43-15e3-4859-90e1-478208f90065Bill Gates1. I am not sure about the detailed information of the customer, nor do I have their contact information. I did not directly communicate with the customer. Our company's business personnel directly communicate with the customer. 2. The customer's product design is based on the sdio interface, so the sdio interface is necessary for them to implement.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3805178Fri, 06 Feb 2026 06:13:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:756ac891-2194-42ba-9ad1-eaba9115120dBill GatesIs it modified in the MMCSD_init() function? 1 bit or 4 bit？https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3805174Fri, 06 Feb 2026 05:20:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:e4eb6624-2b3c-437f-97c5-d168b010536dLydiaFor the SDIO configuration, you would need to manually setup the required MMCSD instance and the pinmux configurations. This can be implemented in a similar way to what happens in the System_init() API that is given. Instead of the default MMCSD_init() API, you can make a custom API with the changes required for SDIO. In this setup itself, you would be able to setup the attributes for the SDIO including 1 bit or 4 bit mode. You could also take reference from the Linux implementation of SDIO on the Processor SDK. The SDIO mode is however, not supported in the MCU+SDK and must be tested on the customer's side.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3805163Fri, 06 Feb 2026 04:02:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:0b6ed6d3-9929-480d-8df4-9e332b2d6973Bill GatesHow to modify eMMC code? Can you provide a reference column? Are there similar reference examples on TI's official website or other websites?https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3805161Fri, 06 Feb 2026 03:58:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:776e7ebf-d598-425d-8ab1-e0c03972728fBill GatesThank you, but my tool interface does not have corresponding options. Why is there such a difference?https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3804185Thu, 05 Feb 2026 09:32:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4f9e9025-9eaf-4fa9-bcef-517d8e77bcc2LydiaThe SDIO mode is not supported in the MCU+SDK. However, with some modifications to the eMMC code, we should be able to make it work. but please note that this must be tested on the customer's side since it is not officially supported in the MCU+SDK.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054118/am2434-does-the-am2434-bp3351-development-board-combination-support-the-sdio-interface/3804182Thu, 05 Feb 2026 09:14:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:6dfd808b-db77-461b-9c5e-e59f5d7c2652LydiaHi, Like I previously mentioned, we do not have an example using the SDIO interface. We will not be providing SDIO implementation unless it is a feature that is absolutely necessary for your customer, and if there is strong reason from your customer that SPI cannot be used between these two devices. If you look at the launchpads of the AM243 and the BP3351 and examine the pinouts, here is additional headwind for your customer: the pins do not line up! The customer will have to use jumper wires just to set up the right connections for the SDIO interface, and the customer also needs to verify the supported voltage levels for the SDIO pins. Therefore, we strongly recommend using SPI to avoid all this headache. Can you provide additional details on the following: 1. Who is your customer and what is the opportunity size? 2. Why is your customer adamant about using SDIO? If there is additional confusion, we can set up a call with the customer. Links for your reference: https://www.ti.com/lit/ug/spruj12f/spruj12f.pdf (AM243x LP Guide) https://www.ti.com/lit/ug/swau130a/swau130a.pdf (BP CC33x1 Guide) Thank you.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3803103Wed, 04 Feb 2026 00:41:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:333ae956-7320-4166-96fc-be1b6c0293ccLydiaI’ve attached a screenshot for reference showing where this option can be found in SysConfig.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054095/am2434-how-to-set-the-4-bit-mode-and-1-bit-mode-of-sdio-for-am2434-development-board-bp3351-module/3802084Tue, 03 Feb 2026 12:30:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:684c9a08-41eb-4fe2-af75-cefe016f816cBill GatesMay I ask if you can send the screenshot again? I don't know how to configure it in the SysConfig tool.Thank you.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054118/am2434-does-the-am2434-bp3351-development-board-combination-support-the-sdio-interface/3802082Tue, 03 Feb 2026 12:02:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:acfa40bc-d97c-46c5-aa26-800dbc6a150aBill GatesIf the sdio interface debugging is successful, it is possible to put AM243 and CC3551 into production.https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054118/am2434-does-the-am2434-bp3351-development-board-combination-support-the-sdio-interface/3802081Tue, 03 Feb 2026 12:01:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:49467e98-b384-449a-ac27-56cb0d327a06Bill Gates1、 The customer is using the sdio interface of BP3551, not the SPI interface. But I don't know how to achieve it. 2、 Will purchase BP3351 and AM243 Does the LP-AM243 and CC3351 support the sdio interface in the RTOS system？https://e2echina.ti.com/support/wireless-connectivity/wifi/f/wi-fi-forum/1054118/am2434-does-the-am2434-bp3351-development-board-combination-support-the-sdio-interface/3799836Fri, 30 Jan 2026 00:07:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:d175dfcf-99b9-44d9-a449-bfa86fa1d402LydiaClarifying question 2: Is the customer planning to go to production with the AM243 and the CC3551?