左上角的几个八卦阵好讲究,不知道起啥作用
这种八卦形的结构是锁相环,在射频芯片里面很常见。
]]>binsys 说:I2S 可以任意,SPI 如果不用 IOMUX的话,速度不保证,也就是可以任意但高速的话只能选固定的两套。
你好 请问你说的两套,是指的哪里呢?
应该是在引脚功能描述里面带有FSPI前缀的那些引脚,GPIO9~GPIO14,GPIO33~GPIO38,datasheet第13页
]]>没有仪器的情况下怎么确定天线是否设计对了?靠信号强度吗?
参考TI的设计尺寸,先用CAD画图纸,然后转到PCB里面一般都是可以的,我画过几个天线都没用仪器测,可以看看这个贴https://blog.csdn.net/u014595638/article/details/112248115
]]>噢,这个MMU是个啥功能
已完成。成。成。 说:那个MMU不支持虚拟地址映射的,Datashit里写了,Linux跑不了的
大胆猜想:会不会是用于PSRAM地址映射一类的。
]]>gatt_counter 可以接受手机调试软件发过来的数据
• Hello World example:
– led counter: Hello World - Blinking an LED without Bluetooth.
• GAP examples:
– gap inquiry: GAP Classic Inquiry.
– gap link keys: GAP Link Key Management (Classic).
• Low Energy examples:
– gap le advertisements: GAP LE Advertisements Scanner.
– gatt browser: GATT Client - Discover Primary Services.
– gatt counter: GATT Server - Heartbeat Counter over GATT.
– gatt streamer server: Performance - Stream Data over GATT (Server).
– gatt battery query: GATT Battery Service Client.
– gatt device information query: GATT Device Information Service
Client.
– gatt heart rate client: GATT Heart Rate Sensor Client .
– nordic spp le counter: LE Nordic SPP-like Heartbeat Server .
– nordic spp le streamer: LE Nordic SPP-like Streamer Server .
– ublox spp le counter: LE u-blox SPP-like Heartbeat Server.
– sm pairing central: LE Central - Test Pairing Methods.
– sm pairing peripheral: LE Peripheral - Test Pairing Methods.
– le credit based flow control mode client: LE Credit-Based Flow-Control
Mode Client - Send Data over L2CAP.
– le credit based flow control mode server: LE Credit-Based Flow-Control
Mode Server - Receive data over L2CAP.
– att delayed response: LE Peripheral - Delayed Response.
– ancs client demo: LE ANCS Client - Apple Notification Service.
– le mitm: LE Man-in-the-Middle Tool.
• Performance examples:
– le streamer client: Performance - Stream Data over GATT (Client).
– gatt streamer server: Performance - Stream Data over GATT (Server).
– le credit based flow control mode client: LE Credit-Based Flow-Control
Mode Client - Send Data over L2CAP.
– le credit based flow control mode server: LE Credit-Based Flow-Control
Mode Server - Receive data over L2CAP.
– spp streamer client: Performance - Stream Data over SPP (Client).
– spp streamer: Performance - Stream Data over SPP (Server).
• Audio examples:
– a2dp sink demo: A2DP Sink - Receive Audio Stream and Control
Playback.
– a2dp source demo: A2DP Source - Stream Audio and Control Volume.
– avrcp browsing client: AVRCP Browsing - Browse Media Players
and Media Information.
– hfp ag demo: HFP AG - Audio Gateway.
– hfp hf demo: HFP HF - Hands-Free.
– hsp ag demo: HSP AG - Audio Gateway
– hsp hs demo: HSP HS - Headset.
– sine player: Audio Driver - Play Sine .
– mod player: Audio Driver - Play 80’s MOD Song.
– audio duplex: Audio Driver - Forward Audio from Source to Sink.
• SPP Server examples:
– spp counter: SPP Server - Heartbeat Counter over RFCOMM.
– spp flowcontrol: SPP Server - RFCOMM Flow Control.
• Networking examples:
– pan lwip http server: PAN - lwIP HTTP and DHCP Server .
– panu demo: BNEP/PANU (Linux only).
• HID examples:
– hid keyboard demo: HID Keyboard Classic.
– hid mouse demo: HID Mouse Classic.
– hid host demo: HID Host Classic.
– hog keyboard demo: HID Keyboard LE.
– hog mouse demo: HID Mouse LE.
– hog boot host demo: HID Boot Host LE.
• Dual Mode examples:
– spp and gatt counter: Dual Mode - SPP and LE Counter.
– gatt streamer server: Performance - Stream Data over GATT (Server).
• SDP Queries examples:
– sdp general query: SDP Client - Query Remote SDP Records.
– sdp rfcomm query: SDP Client - Query RFCOMM SDP record.
– sdp bnep query: SDP Client - Query BNEP SDP record.
• Phone Book Access example:
– pbap client demo: PBAP Client - Get Contacts from Phonebook
Server.
• Testing example:
– dut mode classic: Testing - Enable Device Under Test (DUT) Mode
for Classic.