又来了，这里再给大家介绍一个好玩的东西。
0 ^4 H! n# O4 M2 P这个也是参考github网友的代码，小小改进出来的：% |* a( h' R; ^2 w! e' b+ v" X
http://github.com/RadioOperator/STM32_I2C_Scanner6 @0 a5 M' G6 |; Z# H$ S
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用BluePill最小板，烧入附件的代码，马上就有了一个I2C从设备地址扫描器。# _& S0 F5 z8 _0 e/ z) l8 t
4 \, B5 K8 G5 K2 _, e+ L此外，这一套源码，还可以发展出许多其他应用：
2 p( E* I- V B Y& V1. STM32，VCP（CDC）to I2C 的样板。
3 f' u' p; `3 C+ Q2 `6 g1 f& a" T% Q. z2. 硬件I2C应用。0 U* L4 f9 Y2 i' n$ o5 M% E
3. 实现I2C与VCP上位机之间通信。3 @3 a9 s D( E" @! G! l
4. 研究学习使用LL库。
U$ T9 p& u( e如果改用其他，请注意，原代码设定MCU的工作频率为48MHz，我们通常用72MHz。! B* o0 `( L6 h6 {4 ]% R! s6 p/ F. Z
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使用情况，PC的终端输出：2 Q" ]: o" `. m; E
- STM32 I2C Scanner V0.01 :% z+ w' Y3 k5 p3 I2 i1 i1 o
1 L/ Z0 D, t1 ?; i N7 E0 ?6 o- PB6 -> I2C1_SCL4 W2 q3 g4 N8 e
- PB7 -> I2C1_SDA; E5 F6 k q( S9 r
- 6 Z9 ?6 x+ ^0 {; e' O8 E
- type 's' to scan) k m4 M4 Z) B' F1 ?7 e; Y3 u U
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- SCAN...( [* S' ^0 P; u8 r* V
- 100KHz 200KHz 300KHz 400KHz
9 q- x( e& y1 P2 s( n! Q* }2 G - 0x01 --- --- --- --- / }- d4 X; S, z7 {% g6 i" o1 Q& }
- 0x02 --- --- --- --- 9 f0 ^9 f' R* U% }8 d( I# \+ y W
- 0x03 --- --- --- --- 7 O% B4 W5 @7 V" u$ R8 x
- + y* I# _4 h/ o$ B F
- ..................................
5 _6 `0 t" I" Q$ Q. p - 0 }: Z/ r% B; Z8 W4 O
8 J* {1 A8 m1 I, |% `+ N" `" p- 0x64 --- --- --- ---
# g, l. h D( ]2 N - 0x65 --- --- --- --- ! c2 t, z* F5 \/ B( W* ~6 j
- 0x66 --- --- --- --- 1 \) N2 G$ d8 g! U5 L1 w
- 0x67 --- --- --- ---
6 Z" ?% c. b+ V - 0x68 V V V V
/ C. A2 S$ U- w. S' Z; _! u - 0x69 --- --- --- --- 9 X8 C; o2 S8 U. n
- 0x6A --- --- --- ---
: \5 }1 ^# _' v4 A# z - 0x6B --- --- --- --- ! A5 W8 x2 J" j$ A' Z8 b
- 0x6C --- --- --- ---
9 c* A& k0 P. L* L. h0 m - 0x6D --- --- --- --- 9 r1 ^# w7 l" g
- 0x6E --- --- --- --- 5 v7 e& y4 n: y: D
- 0x6F --- --- --- --- ) j% @; S9 u/ z% a' x
- 0x70 --- --- --- ---
& Q( c* R' F. u; Y7 c/ v( H - 0x71 --- --- --- --- * `0 [+ W9 C8 Q* D8 ]" F! }0 c3 z
- 0x72 --- --- --- ---
7 U6 ^9 [5 g4 c: Q - 0x73 --- --- --- --- ; x# ^0 ~$ _0 R2 V
- 0x74 --- --- --- ---
- X" h! H$ a4 p5 U2 `. b- L/ x u) s - 0x75 --- --- --- ---
% J8 v L2 P0 Z. {: K( _ - 0x76 V V V V
$ Y) ^* ~3 ]0 s- I- r& }6 C0 i. f - 0x77 --- --- --- ---
( x+ t# r0 j7 |' j7 } - 0x78 --- --- --- --- - O m2 ]3 i9 o+ Y v
- 0x79 --- --- --- ---
$ O8 A4 N9 p# K- q - 0x7A --- --- --- ---
0 r7 f& A N3 @) C0 c% [( { X0 C - 0x7B --- --- --- ---
+ C# t. a2 m! ~- k; q0 V - 0x7C --- --- --- ---
; {* a8 I- ]1 W, M# o$ S$ P# H - 0x7D --- --- --- ---
/ R0 B, j; Z/ V- p: U - 0x7E --- --- --- ---
7 g4 I# j$ @3 k( r; a, _$ C - 0x7F --- --- --- --- % Q' z; ]. N# }: O' D1 m
$ Q8 h5 s/ b6 _; l7 K6 i, X1 ~% c- STM32 I2C Scanner V0.01 :* Q/ p% n2 m) W) y( J- F& h
- % t+ m) n. O0 ^- `$ s# c; l% d! H O
- PB6 -> I2C1_SCL
# `9 m' C U5 z: ]$ { - PB7 -> I2C1_SDA5 N$ }7 A9 S' @. K
3 |* Y6 u4 ~8 y# o* q& Z! u- type 's' to scan
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以前也试过I2C设备扫描，串口打印。没你这个方便，直接USB虚拟串口，一个板解决。