通过中断方式读取电压,不过最后楼主读取参考电压失败,还没有找到错误,所以读取的电压只能十六进制显示,/ M. j( _8 v' M" Q O9 o
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本文的介绍按照一般流程来走:6 ]4 ]$ e/ z- Z, s$ J1 I H
1,串口的初始化
/ @: w- D, S3 D$ b/ W2 z2,ADC初始化
7 @4 k7 @, j# U" c# C: d3,中断初始化) h9 I# V9 r! Q7 K- n: F
4,编写中断函数
, ~/ x2 M9 O- D- u. H5,编写主函数. |" W. p( i4 F) d( q
3 C4 |. _& f$ f1 p( O( w1 N& [% c接下来详细介绍:
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1,串口的初始化:
( Z. ?8 M5 R& M+ T! {' Y% ^7 q/ v- void usart_init()- E9 A$ p! B2 X$ J \% B
- {
$ e$ C) }* j$ J8 ^* U - GPIO_InitTypeDef Uart_A; " g6 U$ L1 {' L
- r/ }6 |. R% ^4 A0 [5 Y
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA ,ENABLE); 8 n$ I; ^! y4 \" L
- Uart_A.GPIO_Pin = GPIO_Pin_9; * b F2 i3 L9 r1 C% a: R
- Uart_A.GPIO_Speed = GPIO_Speed_50MHz; $ y5 G0 ?1 n" {+ E
- Uart_A.GPIO_Mode = GPIO_Mode_AF_PP; / b" C4 S! _7 K1 h6 {
- GPIO_Init(GPIOA,&Uart_A); - ~2 n5 @; S5 f3 O7 a2 D% }
-
8 }3 H% V; c" P5 L: i# Q - Uart_A.GPIO_Pin = GPIO_Pin_10; , C4 s9 [( K9 m) l$ Y
- Uart_A.GPIO_Speed = GPIO_Speed_50MHz; 4 ^( ]7 Q& n: ~3 S- }2 j
- Uart_A.GPIO_Mode = GPIO_Mode_IN_FLOATING;
6 m: e E8 S/ t% f* ~9 `) d. m - GPIO_Init(GPIOA,&Uart_A);
! P5 j' f7 o$ x" y, d -
6 _7 b% S+ }; Z5 x/ ^ - USART_InitTypeDef Uart; : M( ~. ]( ^5 ?0 Z
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- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
0 s. Y. B% n. B! P3 K' h3 {( E - Uart.USART_BaudRate = 115200;
) n/ I& t" S/ J- N - Uart.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
2 o4 s1 {% f8 t. a( x - Uart.USART_Mode = USART_Mode_Tx;
& Y" ~4 P" M6 F1 d0 I$ @ - Uart.USART_Parity = USART_Parity_No;
! t0 U! R; G+ }( N1 Q - Uart.USART_StopBits = USART_StopBits_1; * W$ k- u* `, z% O1 R+ g8 w
- Uart.USART_WordLength = USART_WordLength_8b; # V7 k: `4 n2 L# [" J/ z: a
- USART_Init(USART1,&Uart); 1 s% t, X) s8 k6 p
- / x/ ~; l9 B! \, R# W! Q, ?
- USART_Cmd(USART1,ENABLE);
+ Q3 n z9 i$ L# y) y! q3 E: H5 g - USART_ClearFlag(USART1,USART_FLAG_TC);
2 B% j3 m- ]* n. x# P - }
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关于本段代码,我前面写的文章STM32基础设计(3)有详细讲解,此处不再赘述。
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; o8 W. M6 v# o* x2,ADC初始化$ w# t( i0 N& }" P3 }
- typedef struct
4 p. U* F7 e- o6 R/ K3 o* w - {//配置ADC的模式,一个ADC是独立模式,2个是双模式) i& x" j4 L% L$ D! M6 w/ D
- uint32_t ADC_Mode; /*!< Configures the ADC to operate in independent or
! A( S) J% G6 }9 _5 } - dual mode. + M+ R; Y" ]( @; T2 t% L
- This parameter can be a value of @ref ADC_mode */
5 z8 S" u% q$ A. I0 B( a2 ?5 K - //配置ADC是否使用扫描,单通道不扫描,多通道扫描
1 r& u( E4 i+ X3 V/ K2 n - FunctionalState ADC_ScanConvMode; /*!< Specifies whether the conversion is performed in
+ w' N- g, o. [ - Scan (multichannels) or Single (one channel) mode.! ]/ n2 \- M" }" ~2 X. Z2 B1 a; v
- This parameter can be set to ENABLE or DISABLE */5 [5 O; j4 l; Y
- //配置ADC是单次转换还是连续转换
% e) p/ [, A! ~0 O0 @. y' n( w - FunctionalState ADC_ContinuousConvMode; /*!< Specifies whether the conversion is performed in$ \" O" P4 D, r/ }4 I6 O
- Continuous or Single mode.
% v& n/ ?' p0 ?/ K/ _ - This parameter can be set to ENABLE or DISABLE. */( N4 R5 n# _. h9 F5 s8 U( N
- //外部触发选择7 C2 T4 N" \7 g8 s5 P- P
- uint32_t ADC_ExternalTrigConv; /*!< Defines the external trigger used to start the analog
: M6 l) U' g/ q% g# l: q - to digital conversion of regular channels. This parameter
2 W4 l c: m" ^ - can be a value of @ref ADC_external_trigger_sources_for_regular_channels_conversion */
1 K7 H* i. c B1 L8 Y - //转换结果数据对其方式
5 h8 t0 a: \3 [! r$ Z9 J" K - uint32_t ADC_DataAlign; /*!< Specifies whether the ADC data alignment is left or right.6 v/ `! t+ P. ~' F
- This parameter can be a value of @ref ADC_data_align */1 b; u& q$ }% g6 c7 [
- //ADC转换的通道数目
/ e+ p0 G, Z/ b0 B4 Z8 n+ Y, w - uint8_t ADC_NbrOfChannel; /*!< Specifies the number of ADC channels that will be converted
* U4 v3 H# T% m7 Q! [" I; v - using the sequencer for regular channel group.
% I( q. M2 I7 V* H! }; \ - This parameter must range from 1 to 16. */
3 S, i0 ]0 u. {9 m! M - }ADC_InitTypeDef;
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下面粘贴代码:1 e& n6 s0 j+ Q& D' @. y4 _' u7 d
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- void Adc_Init()
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- ADC_InitTypeDef adc;//定义ADC结构的变量
- N) `! s0 w: B/ p; P5 D$ U# _- U& ` - GPIO_InitTypeDef io_b;//定义串口结构体变量 ,开发板上的电源接的是GPIOB端口的 1引脚,查数据手册,其为ADC1的9通道8 [6 ~ K3 E* _# K
-
/ P/ ~. ]! L$ f. H" d3 X8 m$ B7 [7 P - RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB,ENABLE);//开时钟(即把心脏激活)
`) ]9 L r6 C* y' @ - RCC_ADCCLKConfig(RCC_PCLK2_Div6);
+ ]) U/ k3 u S7 D9 r+ e5 V7 \ -
+ q; l. p$ b' Y6 R8 G - io_b.GPIO_Pin = GPIO_Pin_1;//设置端口引脚为 引脚18 w o( |% e: c6 j: X+ [& {
- io_b.GPIO_Mode = GPIO_Mode_AIN;//设置为输入模式
9 E: h" o: d6 x8 f - io_b.GPIO_Speed = GPIO_Speed_50MHz;//最高速率为50MHz3 M- |/ h3 N) e. ^3 |
- GPIO_Init(GPIOB,&io_b);初始化引脚
% W7 j0 h: ^ u' g0 r* ? - ADC_DeInit(ADC1);先将外设ADC1的全部寄存器重设为默认值 ADC_TempSensorVrefintCmd(ENABLE);谁能外部参照电压(勿忘)
1 k' x+ r% N( X4 Z1 r- M' J - adc.ADC_Mode = ADC_Mode_Independent;设置ADC为独立模式+ h* q7 m; c5 c- h: K7 T, @1 h" Y7 z; x
- adc.ADC_ScanConvMode = ENABLE;使能扫描模式
; I% y ^* d! i/ X+ F; g: z - adc.ADC_ContinuousConvMode = ENABLE;使能连续扫描
& | k# Z' D5 l! w' U# y6 h - adc.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;不使用外部触发
4 a9 M. L3 T/ a) T1 h/ M3 v - adc.ADC_DataAlign = ADC_DataAlign_Right;数据右对齐
2 N! f# R+ C4 V: Z7 r - adc.ADC_NbrOfChannel = 2;来制定用几个ADC通达(勿忘)
2 [: @* @3 p- v$ H6 } - ADC_Init(ADC1,&adc);初始化ADC寄存器
2 x' j' Q! ?! z! Y# @ -
6 f$ P8 F( P" }2 F' ] - ADC_RegularChannelConfig(ADC1,ADC_Channel_9,1,ADC_SampleTime_239Cycles5);制定用哪个ADC转换、第几个通道,转换的顺序、转换的周期
. ]+ W7 c& X9 e- P8 |5 ^6 ` - ADC_RegularChannelConfig(ADC1,ADC_Channel_17,2,ADC_SampleTime_239Cycles5);
6 G$ O, L0 p$ ~3 { - //这里需要根据数据手册来设定通道,数据手册上会说明那个引脚对应那个通道,外接电源接到那个引脚上就可以了,必须按照数据手册的要求来,不然肯定会出错,博主在这里就有一个很大很大的教训,望读者谨记
/ ?+ ?+ X# A3 X! B - ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE);打开ADC中断
* r d4 H. F( W3 c* @+ `( Y3 O - ADC_Cmd(ADC1,ENABLE);使能ADC1
+ K, b# I6 w' a, O - ADC_ResetCalibration(ADC1);复位ADC1的校准寄存器
3 Z1 p- x, A+ T* j+ o p2 } - while(ADC_GetResetCalibrationStatus(ADC1));等待校准寄存器复位完成5 x5 U2 B& k6 H$ U/ w7 `2 ?. K( e
-
. F( Q; v9 [! F' s2 j" [ - ADC_StartCalibration(ADC1);开始ADC1校准/ u o6 Z' T) p% }
- while(ADC_GetCalibrationStatus(ADC1));等待ADC1校准完成! H% }* }3 p! f# k5 N; {
- ADC_SoftwareStartConvCmd(ADC1,ENABLE);使能指定的ADC1的软件转换启动功能
5 Y+ N4 T2 L( i% l5 M3 d2 s - }
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3.中断初始化
5 i( h$ [ L- Y- void adc_nvic_init()5 \5 h v4 G1 s8 i
- {5 z5 s- o4 w& x4 f1 d S2 P6 W8 G1 I% y
- ! j& c" h0 Y! k8 E! n/ ?; A6 Q
- NVIC_InitTypeDef nvic;定义中断结构体
# U4 ?; j) `8 Z/ n$ ^8 v b - NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);设置中断分组
) a, ^/ n* f: q - nvic.NVIC_IRQChannel = ADC1_2_IRQn;制定专断通道% z( }6 b$ d [( P
- nvic.NVIC_IRQChannelCmd = ENABLE;使能中断
7 M& P1 u2 y1 B& ?" f* A& T - nvic.NVIC_IRQChannelPreemptionPriority = 1;抢占优先级# O. [4 I- S9 a3 y
- nvic.NVIC_IRQChannelSubPriority = 1;子优先级
1 o+ O+ |: j4 u9 w; ? - NVIC_Init(&nvic);初始化
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- NVIC_InitTypeDef usart1;定义中断结构体
$ H4 m8 c; E; m/ k - NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);设置中断分组 V& `( F+ ~! H K% C% ?' k
- usart1.NVIC_IRQChannel = USART1_IRQn;指定中断通道, ? H; @: N( b. w* N
- usart1.NVIC_IRQChannelCmd = ENABLE;设能中断通道! F/ W! M8 f* r& Q* x, m
- usart1.NVIC_IRQChannelPreemptionPriority = 0;抢占优先级2 ~. T0 O0 D: {1 _* X0 _9 Z
- usart1.NVIC_IRQChannelSubPriority= 0;子优先级$ T5 M+ _' G- C) o7 S
- NVIC_Init(&usart1);中断初始化; ]" ~6 v/ I8 n. u7 E6 p
- }
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- y) T" x& F. p/ v ^3 q4,编写中断函数( I* t% w; [( M* I8 P0 t5 A
先粘贴代码:
& K7 L' b, N4 i2 h) v8 x% Q j- void ADC1_2_IRQHandler()' y* {6 h2 S( L. S; j T! j, |
- {% h, a0 y; i3 a6 h3 X5 }
- if(ADC_GetITStatus(ADC1,ADC_IT_EOC) == SET)这里使用来判断,如果已经转换完成EOC位为1,具体请查看参考手册ADC状态寄存器ADC_SR的eEOC位3 H3 S2 g8 a, {& D/ g
- {if(count_1%2 == 0){代码中的if语句中的嵌套if语句是用来区分外接电源电压和内部参考电压的。具体见下面的解释( ^2 ?3 e" y6 r6 k4 M! J- M
- ADC_ConvertedValue = ADC_GetConversionValue(ADC1);: P! N0 _8 \8 L8 j. T: T
- count_1++;
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- {
, c0 A/ V1 d, @8 h2 { - ADC_ConvertedValue_1 = ADC_GetConversionValue(ADC1);
( Q' ~9 e8 t) X5 {: K7 e/ k1 E - //ADC_ConvertedValue_1 = ADC1->DR;- `0 q- W" N$ V9 m$ ], m1 h1 T
- count_1++;
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- }* D$ Y. g/ \) L& v5 O9 H
- ADC_ClearITPendingBit(ADC1,ADC_IT_EOC);
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- - o( M* Q3 [ E. W3 c, r4 _
- void USART1_IRQHandler(void)
- T2 v" W: e0 O5 {' H; M - {
, W1 q- L P, e3 h" N6 V8 Q+ ?0 L+ \ - if(USART_GetFlagStatus(USART1,USART_FLAG_TXE))判断是否可以发送数据% R( r8 k ]& I/ D. c8 N/ y
- {
9 ?; e0 X( w) W8 T* w( C. g - USART1->CR1 &= ~USART_CR1_TXEIE;在这里笔者也碰到了问题,详见下文* x/ e7 f! V! t2 y) r9 F N$ N, e
- USART1->DR = car;0 P4 Y, [9 f( D. Q, q/ |3 {3 E8 o
- while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
7 a7 j5 B7 d$ a! q- H$ {0 L - //USART1->CR1 &= ~USART_CR1_TXEIE;
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% E* o5 z, @' x& x -
: n) e7 M J7 N. D - if(USART1->SR & USART_SR_RXNE)判断是否可以接收数据1 j7 W3 S& l' K. Y6 L# u+ Z% P
- {
2 t1 n# \# e$ d1 Q* u - volatile int8_t com_data;
* c- H$ x& B0 a' g9 X - com_data = USART1->DR;( G5 u W. N8 Z* y
- }
1 P* }0 J9 v) ?7 \: o- Z - }
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6 e4 ?; h- @+ Q' J$ g) c在ADC中断服务函数中,代码中的if语句中的嵌套if语句是用来区分外接电源电压和内部参考电压的,因为第一次接受的是外部电源电压,第二次接受的是内部参考电压,所以可以利用奇偶数,即偶数用ADC_ConvertedValue来存放外部电源电压值,奇数时用ADC_ConvertedValue_1来存放参考电压值。但是,笔者发现,这样会失败,经过串口调试发现两次接受到的值都一样,笔者初步认为,可能是ADC的转换速率太快了,具体什么歌情况还不清楚,等下一个基础设计ADC转换(DMA方式)的时候在细究。, {, E; C. c6 g/ T
1 B/ q7 B, E) r* v( i M" m" i关于那个还要在中断服务函数中再次将TXEIE设置为零,是因为发送中断是通过 打开中断函数(USART_ITConfig)进入的,该函数中已经将CR1寄存器中的TXEIE位置1 的,所以中断服务函数中还要再次清0,以防止再中断。
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: S* G* v6 n0 f' x) {1 m---------------------------------------------------------------------------------------------------------------------------------
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5,编写主函数' C' f# f8 g4 N: O/ N5 N
- int main() g' M9 s( d$ b8 F& J9 w1 q
- {
3 T$ V6 j# m! G+ E - void PrintU16(uint16_t num);
; F/ L5 }3 C& n; h$ f - void PrintHexU8(uint8_t data);# Q; B' Z" M/ I ~( U) l ^6 O
-
& v9 ~( U1 S! I- u5 Q6 R! ?! B& K - Adc_Init();
* S; I; A A2 _4 F- E - adc_nvic_init();
; s6 u7 o6 y& z% [( k& b - usart_init();1 `3 X3 I/ \* T$ s8 S* R7 i5 w$ y2 D
- while(1)1 K4 I& l3 a1 w i
- {
/ a9 e$ I6 V) U8 x - num = (uint16_t)(2.0f* ADC_ConvertedValue/ADC_ConvertedValue_1 *1.2f*100 );参考电压是1.2f通过比例关系算出实际电压。7 C, o' A/ s: J9 ?. q2 S( r, J' z
- PrintU16(num);
3 ?/ ]: k) _8 }! |* z3 L6 Z - delay(1000);) i. n2 M8 `- x2 K) l' f
- }% g5 O& J$ ?7 T' K7 G6 i( D- v
- }
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笔者并没有计算出准确的电压值,只是采集到两个电压值,笔者猜测,可能是因为ADC的转换速率太快,导致笔者的 通过奇偶数来区分内部电压和外部电压不管用了,笔者还在思考解决方式,如果读者有好的方法,请指教。3 m' I! f9 Z# v6 a; Z
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9 V" ?1 _5 l; |本文到此结束,下面是完整代码: [& k1 G8 C4 j
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- #include<stm32f10x.h>( o2 m0 z) |: S: l
- #define uint unsigned int! Y) ~/ d# B- A8 J/ h6 u
- #define uchar unsigned char
1 f3 R! m1 R8 N$ h% y: p -
" _$ H# x, k! V7 x/ s0 J7 X - char car;" [- x$ B! c4 \- n- }
- static char count_1=0;//当做奇偶数
$ O, [8 y( V& Z4 B5 k d - uint16_t ADC_ConvertedValue;//存放电源电压+ A( d' f6 |4 u5 T- V3 z
- uint16_t ADC_ConvertedValue_1;//存放内部参照电压( Q) i y8 X3 @, [' Z
- static uint16_t num=0;
+ z* l$ n4 S Q3 A# S, p5 x" N" C - void delay(uint n)( S$ k, K( X9 u2 m
- {; Q5 A: w6 `/ a! t5 p
- int i,j;
3 ^$ B/ n4 Q$ d2 r9 B$ r - for(i=0;i<n;i++)/ n! b. l/ R/ z
- for(j=0;j<8500;j++);
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-
1 a' s5 w7 A, c$ X - void Adc_Init(). t0 c% S: F$ H
- {
! h5 h7 \3 v( a - ADC_InitTypeDef adc;
2 b$ G" k$ J; K, y2 O8 k; C - GPIO_InitTypeDef io_b;
# u3 J) r' y2 Y' U( |7 W- S - 5 `9 _6 \ n* M4 n6 g* s
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB,ENABLE);5 O! H6 g) [* ~' v6 w) E
- RCC_ADCCLKConfig(RCC_PCLK2_Div6);
* G8 W, k* ]/ \' a% v" h -
. k. f7 W( k. J: E - io_b.GPIO_Pin = GPIO_Pin_1;
' c" p* r, |- Y5 Y7 S' a7 d - io_b.GPIO_Mode = GPIO_Mode_AIN;9 H( _5 b! N, `: D
- io_b.GPIO_Speed = GPIO_Speed_50MHz;
- C7 i4 Q& q9 b7 w! r' M% p) o! o - GPIO_Init(GPIOB,&io_b);, X7 y( Y; {* C7 |- A
- , t' D! I9 ]2 H
- ADC_DeInit(ADC1);4 Y+ N. G' {3 B$ p# g4 {
- ADC_TempSensorVrefintCmd(ENABLE);
0 v/ ^) O+ e4 _ - adc.ADC_Mode = ADC_Mode_Independent;. ~$ k! s/ h/ f8 A
- adc.ADC_ScanConvMode = ENABLE;. d7 `: \, y w) ]$ ?
- adc.ADC_ContinuousConvMode = ENABLE;
: I' b6 m- N( _0 r9 _9 M# x - adc.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
. A" d! L+ x3 B" ? - adc.ADC_DataAlign = ADC_DataAlign_Right;
: d6 Y7 |: \1 B' `9 i& u - adc.ADC_NbrOfChannel = 2;) P# ~0 s+ B7 h
- ADC_Init(ADC1,&adc);
( W0 k- `! m, A, c* B( t- U -
; a2 W3 _7 j) P5 b$ ]* l8 k8 L - ADC_RegularChannelConfig(ADC1,ADC_Channel_9,1,ADC_SampleTime_239Cycles5);8 W. {4 C- o) \* T
- ADC_RegularChannelConfig(ADC1,ADC_Channel_17,2,ADC_SampleTime_239Cycles5);9 _! l; Z4 v/ d/ e+ n7 @) M8 F* z
- & ]; S* ]6 y% g
- ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE); R; h2 J: G! d3 _
- ADC_Cmd(ADC1,ENABLE);
6 ] ?) K% V$ F' ~6 E& T( E( r - ADC_ResetCalibration(ADC1);
/ j0 \, {7 }+ u) ] - while(ADC_GetResetCalibrationStatus(ADC1));. o6 |: N, M1 b
- 1 x$ x) {6 h; \; K9 u* ] ^/ a
- ADC_StartCalibration(ADC1);7 h/ F+ x# r( o' T8 W
- while(ADC_GetCalibrationStatus(ADC1));
8 R" n7 O- I5 S - ADC_SoftwareStartConvCmd(ADC1,ENABLE);0 _' D% ~: P4 ^# O5 _* A
- }
$ m3 J a9 _- F( n5 }+ K4 c -
! H1 e( w( E& T# [& T) C - void adc_nvic_init()( G5 N! |$ j7 Z2 a7 ~- _
- {) p2 z+ V0 y! O. e+ c/ Q9 X
- 7 v' e S% M4 g" ?2 u$ l
- NVIC_InitTypeDef nvic;0 F9 @2 k! R: p
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
9 b3 w# a# M; L& n8 b8 o. M3 b - nvic.NVIC_IRQChannel = ADC1_2_IRQn;. m4 Q4 ?' E5 x6 q0 I
- nvic.NVIC_IRQChannelCmd = ENABLE;3 V0 ~9 x8 K e9 f; x% {; o
- nvic.NVIC_IRQChannelPreemptionPriority = 1;
% H# @2 j S- I1 B* {6 O6 V - nvic.NVIC_IRQChannelSubPriority = 1;
$ \6 [$ e9 M$ R/ @ - NVIC_Init(&nvic);+ ?; R; L& E ^% i, z
- , v6 u) _/ `! X2 {; r
- NVIC_InitTypeDef usart1;; J" ]3 I, A+ G
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);8 @+ T7 K' }% [
- usart1.NVIC_IRQChannel = USART1_IRQn;# m6 G* P! i) B4 j
- usart1.NVIC_IRQChannelCmd = ENABLE;
! @3 l# h- d9 M - usart1.NVIC_IRQChannelPreemptionPriority = 0;5 r% W2 v2 a: E- |+ c/ X8 {
- usart1.NVIC_IRQChannelSubPriority= 0;
5 @3 X. q3 w: u- u) `3 Y9 Q - NVIC_Init(&usart1);8 H' X! @ S V0 n) D6 q. m/ M
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-
% G. T& P; v k" I - void usart_init()1 n0 J- j) u" M# R
- {# ]( K9 \' B. Q' N
- GPIO_InitTypeDef Uart_A;
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- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA ,ENABLE);
* {/ I* t9 v( } - Uart_A.GPIO_Pin = GPIO_Pin_9; & w, n( Q0 Q' y _* |; F9 p+ r
- Uart_A.GPIO_Speed = GPIO_Speed_50MHz; , ^) B/ T- R8 c9 P! i
- Uart_A.GPIO_Mode = GPIO_Mode_AF_PP; - y5 [" ]( _+ u/ o6 ^
- GPIO_Init(GPIOA,&Uart_A);
: l6 x: ^7 r3 v9 r+ ^ - $ ~ Q) o% y% t6 N6 a* ~$ c) T( z
- Uart_A.GPIO_Pin = GPIO_Pin_10;
. e1 I% K7 S' ]5 ]# z# t - Uart_A.GPIO_Speed = GPIO_Speed_50MHz; 7 t1 {6 z5 D& ]; ?3 I
- Uart_A.GPIO_Mode = GPIO_Mode_IN_FLOATING; + V' M- t1 ^2 b& [; [& u/ f
- GPIO_Init(GPIOA,&Uart_A); - F. ?( @1 E* ^( J
- - a/ C/ f; Z- V/ e* C$ j
- USART_InitTypeDef Uart; 0 f( x. T; f% Q% O7 w) _+ d
- 0 n# ~/ q8 R4 _+ L/ N
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
6 a4 ?+ L, c/ Q- f, l. T( g - Uart.USART_BaudRate = 115200;
) i1 ]8 T- f9 V; h$ Z - Uart.USART_HardwareFlowControl = USART_HardwareFlowControl_None; ; {! J0 b: g- r3 B
- Uart.USART_Mode = USART_Mode_Tx;
3 L4 Z$ X! `/ A5 Q' a - Uart.USART_Parity = USART_Parity_No;
( X, y, K. q/ x4 \& J4 |0 i; }* J - Uart.USART_StopBits = USART_StopBits_1;
5 Y; p, c' `: |# K" n - Uart.USART_WordLength = USART_WordLength_8b;
* H2 M. {$ {0 @ - USART_Init(USART1,&Uart);
7 n# P/ n$ W ~* Z9 X: ^ -
$ ^* m6 S* i q& g6 F. w- i" D - USART_Cmd(USART1,ENABLE);
6 y" c. ^6 r* ]) y; d" \ - USART_ClearFlag(USART1,USART_FLAG_TC); , s/ B1 M0 ]/ {' g5 u+ U/ u
- }
- C8 @ U& k: O I" _0 s - int main()
4 G9 T$ G( K3 D, Y# U! h5 g1 v& p - {
) a% ?2 |# X: r7 |1 V - void PrintU16(uint16_t num);9 v5 E: B' S0 I( s2 z
- void PrintHexU8(uint8_t data);
$ v8 j* X; b$ ~ a -
. w1 Y4 I; f7 J# `' t4 K2 D - Adc_Init();1 z' x: x/ {/ h: H; U
- adc_nvic_init();
# J0 [6 J* I, M - usart_init();
2 i" X- m; L$ E. d9 f, e) E! q - while(1)% }# \) F; o& N3 p
- {
$ R+ i* B4 Y* B# a U; x2 [ - num = (uint16_t)(2.0f* ADC_ConvertedValue/ADC_ConvertedValue_1 *1.2f*100 );6 R$ V" ^6 O! C, @( ^3 g7 {2 {5 d
-
! [. ?" ]) n$ I- o1 n0 u - PrintU16(num);
6 @+ f& ~9 K$ y0 }* S - delay(1000);* C& A! {- W8 y( x8 S- F- X+ N
- }' X1 E: P* V% w. N, a3 G3 D
- }
) X k2 d0 A. K: C4 H+ k* Q -
: E+ O& a1 c J" j1 O/ c9 V Q - void PrintU16(uint16_t num)# _* a! ~: m& d/ [, J2 |/ g+ n
- {5 [5 z6 b" j9 b4 N$ n7 l8 F
- void PrintHexU8(uint8_t data);
, a/ r" G) q. _, N0 @, M0 d - uint8_t w5,w4,w3,w2,w1;% r7 `+ |& y4 o0 j7 s3 Z
- w5 = num % 100000/10000;
! G' X! T( d/ {+ ~ - w4 = num % 10000/1000;
* J/ z! u9 @: u7 \4 k - w3 = num % 1000/100;7 l, Q% B' N" |! n
- w2 = num % 100/10;
. @- w. i. K2 W! R1 }2 J, _( s0 V" E - w1 = num % 10;
" c3 X7 g* m7 Y2 u" V! S2 d - PrintHexU8('0' + w5);
, ?7 P. [5 {$ p: @! P E- A - PrintHexU8('0' + w4);4 }0 I4 o$ G# o, Z g* @
- PrintHexU8('0' + w3);9 ~0 F; c9 B; G( i$ Z
- PrintHexU8('0' + w2);
. _3 d. v" ~) J! X* s( v - PrintHexU8('0' + w1);0 e# z5 F/ b: [+ e+ K
- }
6 B! P( m3 j$ e' F T1 ^ -
N, K3 ]- _: b6 L# z - void PrintHexU8(uint8_t data)7 Y) V3 T$ X- \# _$ U6 T, e3 [5 L
- {
' Y2 m I# ^+ j9 B - car = data;
& X! I4 A, j' A7 E7 G: j; o - if(!(USART1->CR1 & USART_CR1_TXEIE))
: O Q% U# @- G7 V5 x! O8 |# b - USART_ITConfig(USART1,USART_IT_TXE,ENABLE);//打开发送中断2 S9 r* }( c2 w8 F' e, F
- }% |( P$ t/ C5 A
- 9 o/ ?; [- h& ?# b5 i" `* r
- void ADC1_2_IRQHandler() S) E8 Y5 F! W6 k! Z$ o
- {
2 U3 Y, Y ]' k3 [ - if(ADC_GetITStatus(ADC1,ADC_IT_EOC) == SET): y t2 } ~4 g
- {if(count_1%2 == 0){
& S% Z( k; L' P6 s1 i i; a - ADC_ConvertedValue = ADC_GetConversionValue(ADC1);; |0 U7 w1 X) t' Z0 K- w7 Y4 }
- count_1++;* ~3 }7 n+ ~+ N" c8 Z9 b4 G7 R
- }else
# s1 B7 n$ ?; h2 { - {7 K, g% ?3 r2 j4 T
- ADC_ConvertedValue_1 = ADC_GetConversionValue(ADC1);
; j& H/ y4 R4 s: A - count_1++;
, c* F5 x; F) d8 Y$ ]4 C - }
, q; G# x) c$ L - }1 x* x7 i9 D7 d# ?: s- Y/ p
- ADC_ClearITPendingBit(ADC1,ADC_IT_EOC);
: j. e) l4 I$ u2 F - }* i' l, P# B6 F
-
- R! W) q# E2 z g - void USART1_IRQHandler(void)
* C0 Z' d6 o, b, L$ I - {
' o/ w6 ^! d/ W* B - if(USART_GetFlagStatus(USART1,USART_FLAG_TXE))# E5 ~- g0 O) C' B; ]
- {
7 {1 [2 {2 h/ s; L' h2 S* C# T - USART1->CR1 &= ~USART_CR1_TXEIE;. k2 E7 d! {# y0 g7 T n2 O
- USART1->DR = car;
9 _2 Z+ X. G( D1 j - while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);2 p) c- D1 t# p0 y
- //USART1->CR1 &= ~USART_CR1_TXEIE;
^7 s8 D* o, k' @# f' x/ H - }- ^0 e. I$ z2 s4 f% h( s0 N
- / e8 D6 C7 b3 S9 s* t+ K. }
- if(USART1->SR & USART_SR_RXNE)
' N! b6 f) F4 R' Q - {
1 {9 G5 M8 F6 ~! t, Z3 R - volatile int8_t com_data;
4 I, f; p3 K) Z' R; V - com_data = USART1->DR;
' O7 U+ d' u4 C7 G% T - }! r! t- E* i- F
- }
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