前言
* l7 ]0 s  }% j6 Y( a& Z/ k6 NG4板载了一块M24C02(eeprom)和一块MCP4017(可编程电阻)，省赛中多考M24C02，本篇文章讲述如何用软件I2驱动M24C02。

+ B, d* X2 a# A3 kI2C
* g9 z- C) [9 b# d: s. g1 X/ O1.原理图以及配置元素

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分析:由图可知，PB6为I2C的SCL线，PB7为I2C的SDA线

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2.CubeMx的配置步骤
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9 Q0 o- K+ P4 F* y% ^大赛是提供了I2C的驱动的这里我们只需要把两个引脚设置输出模式就行了，不再需要其他步骤。


3.生成工程
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3 e9 e2 T- r2 v" `- |! z! o* e



: `6 ]4 H+ _9 X! H4 j3 z$ U' s将红框中的两个文件复制黏贴到工程文件夹中的bsp文件夹中并改名为i2c.c和i2c.h。


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在bsp文件中新建i2cc.c和i2c.h文件
打开工程将两个文件添加到工程中去
# ]: l; X( O: w  C


7 q2 Q5 e0 F, Y- j9 {至此工程就建立完毕了
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4.测试代码
0 z3 f7 C  T) P5 {% Z, ~5 Ui2c.h:

1. #ifndef __I2C_H
   
2. #define __I2C_H
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3. 
   
4. #include "main.h"
   $ ]- i( y! B/ M( }
5. 
   7 q1 ?7 x2 o; E: y! ^9 l# H
6. void I2CStart(void);
   
7. void I2CStop(void);
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8. unsigned char I2CWaitAck(void);
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9. void I2CSendAck(void);
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10. void I2CSendNotAck(void);
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11. void I2CSendByte(unsigned char cSendByte);
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12. unsigned char I2CReceiveByte(void);
    
13. void I2CInit(void);
    $ \7 Z& R1 [# I" P
14. 
    
15. /*******下方为自己添加的函数声明**************/
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16. unsigned char eeprom_read(unsigned char addr);
    
17. void eeprom_write(unsigned char addr, unsigned char dat);
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18. 
    
19. #endif
    & R2 m2 R: ?, {& @
20. 
    ( i9 B! o) j; M4 Y3 ?3 Q

复制代码

i2c.c:
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1. #include "i2c.h"
   
2. 
   
3. #define DELAY_TIME        20
   
4. 
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5. 
   
6. /**
   ! o2 v+ R4 `( ^
7.   * @brief SDA线输入模式配置
   $ ]( O: i, t$ P" D# t8 \* h& w
8.   * @param None
   
9.   * @retval None
   # X5 J6 D( R' ^& P; O5 D1 ]. J
10.   */
    
11. void SDA_Input_Mode()
    6 f0 o( I- Y% F$ }
12. {
    
13.     GPIO_InitTypeDef GPIO_InitStructure = {0};
    
14. 
    
15.     GPIO_InitStructure.Pin = GPIO_PIN_7;
    
16.     GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
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17.     GPIO_InitStructure.Pull = GPIO_PULLUP;
    ) `/ D" h: b% b4 T5 O: i* {2 B
18.     GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
    
19.     HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
    8 X" B% Z9 D% d7 Y. P  ^0 w8 a
20. }
    
21. 
    ) Q0 a% A1 P( T
22. /**
    
23.   * @brief SDA线输出模式配置
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24.   * @param None
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25.   * @retval None
    2 Q9 L" z  S* n8 h- e2 Q
26.   */
    
27. void SDA_Output_Mode()
    
28. {
    
29.     GPIO_InitTypeDef GPIO_InitStructure = {0};
    
30. 
    
31.     GPIO_InitStructure.Pin = GPIO_PIN_7;
    ( ^( t: [: r; X' Y2 h+ v
32.     GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;
      I' T7 h6 ~6 Z% Y# V# [7 U5 ^
33.     GPIO_InitStructure.Pull = GPIO_NOPULL;
    , L, o" x+ _/ n/ K
34.     GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
    
35.     HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
    
36. }
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37. 
    
38. /**
    ) I2 J$ B7 h6 ~! O
39.   * @brief SDA线输出一个位
    6 U  ~* c0 z7 S" l8 t7 h% t
40.   * @param val 输出的数据
    
41.   * @retval None
    
42.   */
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43. void SDA_Output( uint16_t val )
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44. {
    
45.     if ( val )
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46.     {
    
47.         GPIOB->BSRR |= GPIO_PIN_7;
    
48.     }
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49.     else
    
50.     {
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51.         GPIOB->BRR |= GPIO_PIN_7;
    
52.     }
    
53. }
    
54. 
    
55. /**
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56.   * @brief SCL线输出一个位
    ! P; {7 S3 e) j' h# h3 v6 q9 A
57.   * @param val 输出的数据
    
58.   * @retval None
    
59.   */
    
60. void SCL_Output( uint16_t val )
    
61. {
    
62.     if ( val )
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63.     {
    
64.         GPIOB->BSRR |= GPIO_PIN_6;
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65.     }
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66.     else
    2 K" k/ U9 Z, V) N
67.     {
    ! b0 @1 d5 C7 b, \. |' @( j
68.         GPIOB->BRR |= GPIO_PIN_6;
    ; D1 b4 c, k, p8 b& q
69.     }
    $ P9 j4 v- w: {4 b8 f! E3 c- i# e
70. }
    
71. 
    
72. /**
    
73.   * @brief SDA输入一位
    
74.   * @param None
    7 N/ M' a$ C0 B. H
75.   * @retval GPIO读入一位
    
76.   */
    
77. uint8_t SDA_Input(void)
    " w/ K( v8 M2 }+ p5 x4 N  M
78. {
    9 x5 F+ M" \5 Z) D
79.         if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_7) == GPIO_PIN_SET){
    + `' E& k# m# z2 h8 K9 M
80.                 return 1;
    
81.         }else{
    
82.                 return 0;
    
83.         }
    8 K. N, V8 @( |2 {$ G6 S# A. }
84. }
    
85. 
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86. 
    
87. /**
    * ~8 I9 {8 i$ r4 V# o6 R
88.   * @brief I2C的短暂延时
    
89.   * @param None
    
90.   * @retval None
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91.   */
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92. static void delay1(unsigned int n)
    : l' U8 U# \. v2 X  i6 h& S
93. {
    
94.     uint32_t i;
    : J. u$ Z0 j% H* Y8 o6 ^/ n3 @
95.     for ( i = 0; i < n; ++i);
    
96. }
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97. 
    5 E. w9 M6 p$ D
98. /**
    - V2 S8 u7 z4 C* W
99.   * @brief I2C起始信号
    
100.   * @param None
     
101.   * @retval None
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102.   */
     
103. void I2CStart(void)
     . _7 Y& h. Y* K: D8 f
104. {
       S1 H# l1 m/ |) p4 Q8 u, a; s+ U
105.     SDA_Output(1);
     
106.     delay1(DELAY_TIME);
     
107.     SCL_Output(1);
     
108.     delay1(DELAY_TIME);
     
109.     SDA_Output(0);
     
110.     delay1(DELAY_TIME);
     
111.     SCL_Output(0);
     
112.     delay1(DELAY_TIME);
     
113. }
       J9 T/ d: U8 C& q. t: u# J
114. 
     
115. /**
     + Y8 Q3 d, j8 O5 m+ U: I
116.   * @brief I2C结束信号
     
117.   * @param None
     
118.   * @retval None
     * ]1 n' F8 P  Y+ u" a  I" @
119.   */
     . ~( B4 s2 r1 B. W1 S" X% N
120. void I2CStop(void)
     
121. {
     
122.     SCL_Output(0);
     $ k% t8 d0 E+ H/ U) V
123.     delay1(DELAY_TIME);
     
124.     SDA_Output(0);
     
125.     delay1(DELAY_TIME);
     
126.     SCL_Output(1);
     7 T% V' W8 K4 N# e
127.     delay1(DELAY_TIME);
     
128.     SDA_Output(1);
     
129.     delay1(DELAY_TIME);
     . q7 V  _3 s9 l5 M' p
130. 
     
131. }
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132. 
     8 B3 E, H9 |2 c/ w. s1 N( |
133. /**
     
134.   * @brief I2C等待确认信号
     
135.   * @param None
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136.   * @retval None
     
137.   */
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138. unsigned char I2CWaitAck(void)
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139. {
     - m2 a# z3 `% Q  v
140.     unsigned short cErrTime = 5;
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141.     SDA_Input_Mode();
       y  Y) }* |& }0 x3 k
142.     delay1(DELAY_TIME);
     3 m4 s2 J9 i9 e6 r$ ]! q
143.     SCL_Output(1);
     $ D6 V. x' \( Y/ r2 @" a: S5 z
144.     delay1(DELAY_TIME);
     
145.     while(SDA_Input())
     ' w, v5 T: R" z( i7 ?
146.     {
     8 j2 n3 Z# @( p; w, k
147.         cErrTime--;
     
148.         delay1(DELAY_TIME);
     
149.         if (0 == cErrTime)
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150.         {
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151.             SDA_Output_Mode();
     
152.             I2CStop();
     
153.             return ERROR;
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154.         }
     , V2 v! Q# ^6 o# E, d) Y% K
155.     }
     
156.     SDA_Output_Mode();
     , E5 _: N, [* h2 M" W
157.     SCL_Output(0);
     
158.     delay1(DELAY_TIME);
     
159.     return SUCCESS;
     ( s3 D+ e3 d6 P8 R
160. }
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161. 
     * i+ ^) T, K' {
162. /**
     
163.   * @brief I2C发送确认信号
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164.   * @param None
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165.   * @retval None
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166.   */
     
167. void I2CSendAck(void)
     
168. {
     3 ^0 H0 }6 o5 c  H* ~6 o
169.     SDA_Output(0);
     
170.     delay1(DELAY_TIME);
     + i* L) X9 o' U$ P( }9 N
171.     delay1(DELAY_TIME);
     
172.     SCL_Output(1);
     
173.     delay1(DELAY_TIME);
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174.     SCL_Output(0);
     & k5 h! n; I* N7 z& e
175.     delay1(DELAY_TIME);
     
176. 
     0 T, b  x% b% \, R
177. }
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178. 
     
179. /**
     
180.   * @brief I2C发送非确认信号
     
181.   * @param None
     
182.   * @retval None
     7 e4 t9 Q- ]8 M5 I% S' r( h0 E! Z
183.   */
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184. void I2CSendNotAck(void)
     $ h# X/ J( ?) ?" o; r2 q
185. {
     5 d6 B0 s3 X4 d$ X' K
186.     SDA_Output(1);
       J, g4 W' d, A. ]) h( H
187.     delay1(DELAY_TIME);
     
188.     delay1(DELAY_TIME);
     
189.     SCL_Output(1);
     5 V5 r) @  D( Y; {# x6 s, t2 [
190.     delay1(DELAY_TIME);
     , W& Z- j/ G. e: O3 K) _4 i: C5 q
191.     SCL_Output(0);
     + E  b' s, `( ^- I
192.     delay1(DELAY_TIME);
     6 i' S# b0 r/ h1 F) O! i( {
193. 
     . Z8 A9 B1 }( y' y" y
194. }
     
195. 
     
196. /**
     
197.   * @brief I2C发送一个字节
     
198.   * @param cSendByte 需要发送的字节
     8 m; d. ?9 H$ V! J& F! m
199.   * @retval None
     3 z0 p/ \: |- Q) ~
200.   */
     7 K, |4 t5 H$ K3 f0 l  N  i
201. void I2CSendByte(unsigned char cSendByte)
     
202. {
     
203.     unsigned char  i = 8;
     
204.     while (i--)
     : C$ b* Y& o8 x1 t) h
205.     {
     
206.         SCL_Output(0);
     
207.         delay1(DELAY_TIME);
     + C& X6 H( Q* [
208.         SDA_Output(cSendByte & 0x80);
     : [0 o6 u; `+ h0 J$ ^
209.         delay1(DELAY_TIME);
     6 q; B: P( {1 f# l5 ~  p& y
210.         cSendByte += cSendByte;
     
211.         delay1(DELAY_TIME);
     
212.         SCL_Output(1);
     
213.         delay1(DELAY_TIME);
     
214.     }
     ( L# h4 n) Y3 F  e, S7 s5 x5 [
215.     SCL_Output(0);
     - S7 y7 x1 `/ ?$ B" \; f
216.     delay1(DELAY_TIME);
     
217. }
     5 T2 d! F) n& a; Q
218. 
     5 r9 B  m  O5 M7 u% c( Y# P
219. /**
     1 S2 f, k) A1 a* i& Z* S- `; ?
220.   * @brief I2C接收一个字节
     
221.   * @param None
     
222.   * @retval 接收到的字节
     
223.   */
     
224. unsigned char I2CReceiveByte(void)
     " {4 P# ^6 m7 W" l1 w
225. {
     0 F+ @8 H; Z9 S+ y4 f
226.     unsigned char i = 8;
     
227.     unsigned char cR_Byte = 0;
     
228.     SDA_Input_Mode();
     
229.     while (i--)
     
230.     {
     % w4 O3 h# L9 [7 l
231.         cR_Byte += cR_Byte;
     
232.         SCL_Output(0);
     
233.         delay1(DELAY_TIME);
     2 F( M$ M: G) T( `4 W: C* j
234.         delay1(DELAY_TIME);
     
235.         SCL_Output(1);
     2 ]  r# s& \( g: m- i
236.         delay1(DELAY_TIME);
     " B) r( c: |8 G
237.         cR_Byte |=  SDA_Input();
     
238.     }
     - b0 ^; H% V) H2 k, S/ `7 g4 N
239.     SCL_Output(0);
     ) }* H/ y# m2 Y1 r5 N, k; k& K
240.     delay1(DELAY_TIME);
     6 H5 S# o; ^- }- \( `- a. x
241.     SDA_Output_Mode();
     " n  l% s+ G- ~2 x
242.     return cR_Byte;
     
243. }
     $ [( _0 j8 W/ {  G7 }( L
244. 
     4 c. O8 x0 I$ d
245. //
     * y( G: W( h3 i3 E, E0 _7 d
246. void I2CInit(void)
     
247. {
     
248.                 GPIO_InitTypeDef GPIO_InitStructure = {0};
     $ ?  Y3 e1 B+ A" B
249. 
     ' ]2 O* L- k0 \: K8 @5 R- u7 y0 T
250.     GPIO_InitStructure.Pin = GPIO_PIN_7 | GPIO_PIN_6;
     ) b( L# ?% \6 h4 E# |3 _& |1 Z# N
251.     GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
     
252.     GPIO_InitStructure.Pull = GPIO_PULLUP;
     1 p% j- R. H- n8 p# C2 q7 i
253.     GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
     - k% A4 E' E. Z4 z- H
254.     HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
     . f3 V, K3 b( w3 w
255. }
     
256. 
     
257. /**************以上是大赛提供的驱动**************************/
     
258. 
     
259. 
     - e9 |4 z. f. }  ]0 Y. O" N# n5 _
260. /***********以下是自己写的对24C02的读写操作******************/
     
261. 
     
262. unsigned char eeprom_read(unsigned char addr)
     
263. {
     
264.         unsigned char dat;
     $ c5 O5 n+ N3 A* V
265.         
     ( Y' [8 G7 o1 e5 H9 N8 U0 g
266.         I2CStart();
     , x, \. n7 P) @! J2 Q( N5 Y2 n- U8 C
267.         I2CSendByte(0xa0);
     % v* U% W! d* `6 ~* Y' ?
268.         I2CWaitAck();
     
269.         I2CSendByte(addr);
     
270.         I2CWaitAck();
     ! `/ N5 M) z# h( F2 |3 f5 P. z
271.         I2CStop();
     3 n: p, ]) {) I1 N& i2 n& M
272.         
     ! m* {$ O# b. R" e1 q3 y* d
273.         I2CStart();
     
274.         I2CSendByte(0xa1);
     
275.         I2CWaitAck();
     
276.         dat = I2CReceiveByte();
     $ w; ^& @' U) L
277.         I2CWaitAck();
     . u# Y$ k, E( Y' j0 V9 I- ?8 h* J
278.         I2CStop();
     
279.         
     2 f; s; C7 n* e0 n9 D
280.         return dat;
     
281. }
     3 u6 y/ y0 U7 D* z  Q. _1 `5 q9 t
282. 
     ! H* D: _% M" j: {; F" K( b! g
283. 
     
284. void eeprom_write(unsigned char addr, unsigned char dat)
     
285. {
     
286.         I2CStart();
     $ I' P" _" ]# \9 z7 I# `1 a7 Q
287.         I2CSendByte(0xa0);
     ( l) X) z; q( Q9 d" E" `, c2 V7 X
288.         I2CWaitAck();
     , u# ]0 E9 [/ Q
289.         I2CSendByte(addr);
     ; @! \. i* u& g  n' d* R2 J
290.         I2CWaitAck();
     
291.         I2CSendByte(dat);
     / R" ~+ x+ `' @: \6 T1 Q
292.         I2CWaitAck();
     
293.         I2CStop();
     ; E, t8 {+ n2 g" h
294. }
     . c0 n# T9 Y" j4 |
295. 
     

复制代码

" U9 i4 O* {7 qmain.c:
! ?3 o* q, u8 N0 I4 k

1. /* USER CODE BEGIN Header */
   7 J- {9 M! o( Z" {
2. /**
   & ^! v( Y9 l6 E3 c) Q( f
3.   ******************************************************************************
   6 m7 d8 h6 `/ ~
4.   * @file           : main.c
   
5.   * @brief          : Main program body
   
6.   ******************************************************************************
   
7.   * @attention
   2 z, d+ X4 k3 B: H3 E
8.   *
   $ B7 T: t5 b9 Y# V: {3 b! V2 Y
9.   * <h2><center>© Copyright (c) 2023 STMicroelectronics.
   
10.   * All rights reserved.</center></h2>
    * a! M4 S: ^4 |) |0 H
11.   *
    
12.   * This software component is licensed by ST under BSD 3-Clause license,
    
13.   * the "License"; You may not use this file except in compliance with the
    
14.   * License. You may obtain a copy of the License at:
    
15.   *                        opensource.org/licenses/BSD-3-Clause
    / P5 E% D# O) s. n) N$ l% j" u
16.   *
    
17.   ******************************************************************************
    8 q6 L8 Y, w5 V1 S9 `$ q8 o6 K6 }2 T
18.   */
    7 V. H4 f1 \" w/ n5 H+ D0 `
19. /* USER CODE END Header */
    
20. /* Includes ------------------------------------------------------------------*/
    9 q2 O# F4 O( B8 n* G1 H
21. #include "main.h"
    
22. #include "adc.h"
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23. #include "tim.h"
    
24. #include "gpio.h"
    
25. 
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26. /* Private includes ----------------------------------------------------------*/
    
27. /* USER CODE BEGIN Includes */
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28. #include "lcd.h"
    
29. #include "badc.h"
    
30. #include "stdio.h"
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31. #include "i2c.h"
    
32. #include "interrupt.h"
    
33. /* USER CODE END Includes */
    
34. 
    
35. /* Private typedef -----------------------------------------------------------*/
    
36. /* USER CODE BEGIN PTD */
    
37. 
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38. /* USER CODE END PTD */
    
39. 
    
40. /* Private define ------------------------------------------------------------*/
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41. /* USER CODE BEGIN PD */
    
42. /* USER CODE END PD */
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43. 
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44. /* Private macro -------------------------------------------------------------*/
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45. /* USER CODE BEGIN PM */
    
46. 
    
47. /* USER CODE END PM */
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48. 
    
49. /* Private variables ---------------------------------------------------------*/
    
50. 
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51. /* USER CODE BEGIN PV */
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52. extern struct keys key[4];
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53. unsigned char adc1_L, adc1_H;
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54. /* USER CODE END PV */
    
55. 
    
56. /* Private function prototypes -----------------------------------------------*/
    
57. void SystemClock_Config(void);
    
58. /* USER CODE BEGIN PFP */
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59. 
    
60. /* USER CODE END PFP */
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61. 
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62. /* Private user code ---------------------------------------------------------*/
    
63. /* USER CODE BEGIN 0 */
    
64. 
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65. /* USER CODE END 0 */
    
66. 
    
67. /**
    
68.   * @brief  The application entry point.
    
69.   * @retval int
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70.   */
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71. int main(void)
    
72. {
    
73.   /* USER CODE BEGIN 1 */
    
74. 
    
75.   /* USER CODE END 1 */
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76. 
    
77.   /* MCU Configuration--------------------------------------------------------*/
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78. 
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79.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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80.   HAL_Init();
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81. 
    . X8 a) f! N+ }( }
82.   /* USER CODE BEGIN Init */
    
83. 
    
84.   /* USER CODE END Init */
    
85. 
    
86.   /* Configure the system clock */
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87.   SystemClock_Config();
    
88. 
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89.   /* USER CODE BEGIN SysInit */
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90. 
    
91.   /* USER CODE END SysInit */
    
92. 
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93.   /* Initialize all configured peripherals */
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94.   MX_GPIO_Init();
    
95.   MX_TIM3_Init();
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96.   MX_TIM16_Init();
    
97.   MX_TIM17_Init();
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98.   MX_ADC1_Init();
    
99.   MX_ADC2_Init();
    
100.   /* USER CODE BEGIN 2 */
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101.         LCD_Init();
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102.         LCD_Clear(Black);
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103.         LCD_SetBackColor(Black);
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104.         LCD_SetTextColor(White);
     
105.         HAL_TIM_Base_Start_IT(&htim3);
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106.   /* USER CODE END 2 */
     
107. 
     
108.   /* Infinite loop */
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109.   /* USER CODE BEGIN WHILE */
     
110.   while (1)
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111.   {
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112.     /* USER CODE END WHILE */
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113. 
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114.     /* USER CODE BEGIN 3 */
     
115.                 char text[30];
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116.                 unsigned int adc1, adc2;
     
117.                 adc1 = getADC(&hadc1);
     
118.                 sprintf(text, "    V1:%.2f", adc1 * 3.3 / 4096);
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119.                 LCD_DisplayStringLine(Line4, (unsigned char *)text);
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120.                 adc2 = getADC(&hadc2);
     
121.                 sprintf(text, "    V2:%.2f", adc2 * 3.3 / 4096);
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122.                 LCD_DisplayStringLine(Line5, (unsigned char *)text);
     
123.                 if(key[0].single_flag) //短按写入
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124.                 {
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125.                         adc1_L = adc1 & 0xff;
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126.                         adc1_H = adc1 >> 8;
     
127.                         eeprom_write(1, adc1_L);
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128.                         HAL_Delay(10);
     
129.                         eeprom_write(2, adc1_H);
     
130.                         key[0].single_flag = 0;
     
131.                 }
     
132.                 if(key[0].long_flag) //长按读出
     
133.                 {
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134.                         char text[30];
     
135.                         unsigned int eep_temp = (eeprom_read(2) << 8) + eeprom_read(1);
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136.                         sprintf(text, "    ADC_eep=%.2f", eep_temp * 3.3 / 4096);
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137.                         LCD_DisplayStringLine(Line8, (unsigned char *)text);
     
138.                         key[0].long_flag = 0;        
     
139.                 }
     
140.   }
     
141.   /* USER CODE END 3 */
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142. }
     
143. 
     
144. /**
     
145.   * @brief System Clock Configuration
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146.   * @retval None
     
147.   */
     
148. void SystemClock_Config(void)
     
149. {
     
150.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
     
151.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
     
152.   RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
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153. 
     
154.   /** Configure the main internal regulator output voltage
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155.   */
     ! }# G# Z) X: R# M2 y; }
156.   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
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157.   /** Initializes the RCC Oscillators according to the specified parameters
     5 N( D+ A/ `  r
158.   * in the RCC_OscInitTypeDef structure.
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159.   */
     
160.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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161.   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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162.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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163.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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164.   RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV3;
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165.   RCC_OscInitStruct.PLL.PLLN = 20;
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166.   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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167.   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
     
168.   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
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169.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
     
170.   {
     % n3 `+ g3 u* J3 Z! x% A2 T
171.     Error_Handler();
     
172.   }
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173.   /** Initializes the CPU, AHB and APB buses clocks
     
174.   */
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175.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
     
176.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
     
177.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     ) \7 h; }1 X/ `* Z  H: n! V
178.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
     
179.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
     
180.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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181. 
     ( d2 G7 P# h6 E% M4 G
182.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
     
183.   {
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184.     Error_Handler();
       Z" f  R, H1 \) h0 v
185.   }
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186.   /** Initializes the peripherals clocks
     ; f+ l: @' t/ U2 g2 W" R) o
187.   */
     
188.   PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC12;
     
189.   PeriphClkInit.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
     3 f0 L- s6 ]7 v* x
190.   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
     
191.   {
     1 o2 e- i$ F) n
192.     Error_Handler();
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193.   }
     1 O& Y% U( `0 R1 y
194. }
     
195. 
     9 L2 n; P" `" [' l/ F1 [
196. /* USER CODE BEGIN 4 */
     
197. 
     ; r, x2 M8 z8 X4 D+ ?
198. /* USER CODE END 4 */
     
199. 
     
200. /**
     
201.   * @brief  This function is executed in case of error occurrence.
     ( F7 G( [  I8 S7 y/ ?
202.   * @retval None
     
203.   */
     
204. void Error_Handler(void)
     ) G/ i" ~% S! w7 T0 ^% c
205. {
     
206.   /* USER CODE BEGIN Error_Handler_Debug */
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207.   /* User can add his own implementation to report the HAL error return state */
     
208.   __disable_irq();
     : X2 F( i3 [' U; [8 H/ B
209.   while (1)
     5 a4 t; u: ?0 t! H, j5 b
210.   {
     
211.   }
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212.   /* USER CODE END Error_Handler_Debug */
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213. }
     ' y9 E( c" U# X( X& t3 ^- ]
214. 
     % @: ^! Q, R2 v+ ]4 z/ B: L
215. #ifdef  USE_FULL_ASSERT
     
216. /**
     ' X4 d! N0 A/ {. |1 A; }
217.   * @brief  Reports the name of the source file and the source line number
     
218.   *         where the assert_param error has occurred.
     
219.   * @param  file: pointer to the source file name
     
220.   * @param  line: assert_param error line source number
     $ p4 [# p" Z0 N, h- W" w+ ?- @3 D
221.   * @retval None
     
222.   */
     ( q+ g8 ]' C: q% I
223. void assert_failed(uint8_t *file, uint32_t line)
     
224. {
     , S+ S8 Y& g8 v% |
225.   /* USER CODE BEGIN 6 */
     
226.   /* User can add his own implementation to report the file name and line number,
     6 s$ s5 b5 J" r8 V5 J8 E0 [3 f6 W
227.      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
     5 ^. q! `5 L# P6 P! @
228.   /* USER CODE END 6 */
     
229. }
     
230. #endif /* USE_FULL_ASSERT */
     9 e, t( t) a1 ?8 w
231. 
     
232. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     
233. 
     

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