本文简单介绍了STM32F103C8,通过DMA方式读取ADC并通过串口中断向电脑端打印出当前电源ADC的值。
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g! D/ J) q1 J: J2 a) {现在先将设计过程的主要步骤介绍如下:
) K6 T# t3 x2 d- }& b- K) a 1,串口配置
$ x9 G. D3 J, R 2,中断配置7 w5 S. E% F1 w7 m! M- q5 |; b
3,DMA配置- w6 r, }4 ?7 K" }. N1 Y
4,ADC配置6 \5 _; P# o% w0 [+ H
5,中断服务函数
$ b1 N+ ]' t+ \3 G 6,主函数
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先总结下博主在这次基础设计中犯的错误,在中断初始化函数中,没有将中断通道使能,导致电脑端没有接收到数据,发现后就去检查串口初始化函数了,结果没有发现错误,而是检查了一遍代码才发现错误。发现串口无法工作后,先核查初始化函数,如果问题没有解决,第二步,如果是串口中断方式,接下来检查,中断初始化函数,如果是串口查询方式,接下来检查主函数的串口查询代码。
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, A$ u& T5 C8 G" |0 d接下来详细介绍各个步骤:
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1,串口配置- j3 g6 a% [2 I( i
- void usart_init(void)* M) M0 `7 k1 F( y. T% l* g
- {
. y2 V- o" N5 u! M# V - GPIO_InitTypeDef GPIO_usart;定义GPIO结构体$ b7 R. t* z* _
- USART_InitTypeDef USART_usart;定义串口结构体% _9 {4 f1 L& g9 V/ a8 A7 u6 J6 g
-
$ j! |5 R# P5 Y+ K - RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1 ,ENABLE);使能外设时钟4 H5 l( O$ F. q5 o$ A% [+ F
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- GPIO_usart.GPIO_Pin = GPIO_Pin_9;. Y, z! q" \4 C2 G: n ]4 r+ Y
- GPIO_usart.GPIO_Mode = GPIO_Mode_AF_PP;2 v- c% B' a1 X# q6 _$ \
- GPIO_usart.GPIO_Speed = GPIO_Speed_50MHz;
/ B5 {2 O' j$ \ - GPIO_Init(GPIOA,&GPIO_usart);配置发送口
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6 [! g. s% D; y; _. T - GPIO_usart.GPIO_Pin = GPIO_Pin_10;
" K" X9 H+ a3 W+ H& r9 v+ O5 R' K - GPIO_usart.GPIO_Mode = GPIO_Mode_IN_FLOATING;
; n4 L6 x1 [2 P3 i' M8 o, @2 p - GPIO_usart.GPIO_Speed = GPIO_Speed_50MHz;
6 ?; V- i, w1 F/ d - GPIO_Init(GPIOA,&GPIO_usart);配置接受口2 t" f y/ ]- ]% V5 P( _
-
1 d6 {8 o; y# o& Z - USART_usart.USART_BaudRate = 115200;设置传输波特率2 `! U E! `( D( ]1 i& W, f
- USART_usart.USART_WordLength = USART_WordLength_8b;设置串口发送字长
' y3 Z9 c- N4 O - USART_usart.USART_StopBits = USART_StopBits_1;设置停止位8 f7 A6 F- d" }& D/ a
- USART_usart.USART_Parity = USART_Parity_No;不进行奇偶校验
& B* F# \9 }; ?: Z3 x7 F1 I - USART_usart.USART_HardwareFlowControl = USART_HardwareFlowControl_None;硬件流使能
* S6 {& `% p3 |3 Z* i - USART_usart.USART_Mode = USART_Mode_Tx;设置为发送模式 ^" U! ^; ?, B; [( |
- USART_Init(USART1,&USART_usart);初始化串口寄存器1 D% ]3 y5 l3 N& g
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# B0 T; _# L8 }0 ]% T4 D; b# u- c - USART_Cmd(USART1,ENABLE);串口使能! ?. c2 ~4 L! A. N1 p! D
- USART_ClearFlag(USART1,USART_FLAG_TC);清除已发送位,防止第一位发不出去
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2,中断配置
9 {" O* o4 p/ j/ g5 [- void nvic_init(void) _/ q; f7 h# u, q
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0 _. h- f- r, C2 P1 B2 I6 A - NVIC_InitTypeDef nvic_usart;定义中断结构体
9 V8 ~2 W4 | S" U' ~ - NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);设置中断分组
' J# L/ e8 F+ y' b - nvic_usart.NVIC_IRQChannel = USART1_IRQn;制定中断服务函数通道: t4 h1 `' Q( R' z( q& j# I1 E0 M0 H9 m
- nvic_usart.NVIC_IRQChannelPreemptionPriority = 1;抢占优先级1
5 c# Z' _7 J0 H - nvic_usart.NVIC_IRQChannelSubPriority = 0;子优先级0. T5 T. r J7 |; N/ s" X6 }
- nvic_usart.NVIC_IRQChannelCmd = ENABLE;通道使能1 J" A$ s& G/ J
- NVIC_Init(&nvic_usart);中断寄存器初始化
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7 v+ Q% |: H3 b" }7 ~6 C3,DMA配置
, ~( Y6 T( I8 F5 N+ l4 Z- void dma_init(void)
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# B) H6 X$ ]- ]3 M# @# J - DMA_InitTypeDef dma;定义DMA结构体
" ^# Z) z3 l/ A! c% b - RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);打开时钟
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1 ~6 d/ \6 A' ~" L - DMA_DeInit(DMA1_Channel1);现将DMA,通道1寄存器复位
, j3 y! _1 W- J# b j - dma.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;设置外设地址* v7 c$ u( ]4 y# y( ?
- dma.DMA_MemoryBaseAddr = (uint32_t)ADC_Value;设置存储器地址
1 ?4 d8 {4 R4 B8 v) a4 n0 _ - dma.DMA_DIR = DMA_DIR_PeripheralSRC;设置传输方向为 外设到存储器
2 q. a7 o$ C. B9 f9 i9 Y* [ - dma.DMA_BufferSize = 2;数据缓冲为设置为2 K Y: Q/ h6 C9 w9 y
- dma.DMA_PeripheralInc = DMA_PeripheralInc_Disable;外设地址固定
% m/ K: ^$ t+ p4 c3 W - dma.DMA_MemoryInc = DMA_MemoryInc_Enable;寄存器地址自增+ W) v2 t, Y9 t r& r* \1 u
- dma.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;外设数据位宽度半字' e) u1 e) [) ]$ h! t8 I
- dma.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;存储器数据位宽度半字
( a7 o/ e2 O( m9 K* @5 v - dma.DMA_Mode = DMA_Mode_Circular;DMA工作在循环模式) ?& i0 h* E* L5 P$ J V/ Z) c. j
- dma.DMA_Priority = DMA_Priority_High;DMA通道为高优先级
2 a: {. M4 E' t - dma.DMA_M2M = DMA_M2M_Disable;内存到内存传输使能' } a+ N ]9 ?( S- m/ F4 V
- DMA_Init(DMA1_Channel1,&dma);初始化DMA寄存器
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~. h: [3 K# v9 @ T8 h - //DMA_Cmd(DMA1_Channel1,ENABLE);使能通道1 (笔者把这句放到主函数中了,在这里写也行,只不过是笔者认为放到主函数中便于理解)
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# l1 n& [+ k& ^4,adc配置- k F0 Y1 V+ l7 t5 ^
- void adc_init(void)/ M, i: V6 t: T# C. ~9 Y! Y1 ^5 o
- {
0 `% J) K2 U3 h0 f - ADC_InitTypeDef adc;定义adc结构体$ i" _7 F- e" m
- GPIO_InitTypeDef adc_gpio;定义GPIO结构体
7 `% }! K( { P) g9 p& n Q. i. w - RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB,ENABLE);使能外设
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* R- e3 q: _ t8 D/ T& z - adc_gpio.GPIO_Pin = GPIO_Pin_1;
0 I) I9 x8 `) Z0 x" i/ ?" Y, Y - adc_gpio.GPIO_Mode = GPIO_Mode_AIN;0 y+ T9 K" ?( K! \# t0 |- Y; W
- GPIO_Init(GPIOB,&adc_gpio);使能ADC的测试通道2 x h }2 W' z) O5 e ~9 P
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- ADC_DeInit(ADC1);复位ADC1寄存器. b; G* P* l6 e) s* j' n" R) g
- ADC_TempSensorVrefintCmd(ENABLE);使能内部参照电压
# J4 y- v; X( ]/ f0 l1 f0 k - adc.ADC_Mode = ADC_Mode_Independent;ADC工作在独立模式* E6 ]- I; v" V3 F9 m6 v& ?( c
- adc.ADC_ScanConvMode = ENABLE;使用扫描模式$ U1 ~3 [5 N% e& s8 i
- adc.ADC_ContinuousConvMode = ENABLE;使用连续转换模式' Q: u6 M) D0 q: N
- adc.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;不使用外部触发工作模式
3 A& d7 U; y; n D$ G - adc.ADC_DataAlign = ADC_DataAlign_Right;数据设置为右对齐
* p, U0 H) f* O$ Y2 c& _; d p [ - adc.ADC_NbrOfChannel = 2;两个转换通道0 \2 x! ~" N; F. q
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3 V5 c3 ^" h& C9 J# S \7 f - ADC_Init(ADC1,&adc);初始化寄存器
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( N! w7 S; H' z - ADC_RegularChannelConfig(ADC1,ADC_Channel_9,1,ADC_SampleTime_239Cycles5);对通道9采样(电源电压)
$ @1 j2 `( E/ L - ADC_RegularChannelConfig(ADC1,ADC_Channel_17,2,ADC_SampleTime_239Cycles5);对通道11采样(参考电压) H0 b; K/ w; v# }" G
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- //ADC_DMACmd(ADC1,ENABLE);ADC 的DMA通道使能
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' A" s; P; a8 _; i! g - //ADC_Cmd(ADC1,ENABLE);ADC使能
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- //ADC_ResetCalibration(ADC1);复位ADC1的校准寄存器
, b. j2 [0 H6 z6 ]( F4 \- D" U* x - //while(ADC_GetResetCalibrationStatus(ADC1));等待复位完成
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; d6 ]7 H# f. U8 z - //ADC_StartCalibration(ADC1);开始ADC1校准
8 u. B) h b, P9 O" Z0 f: E - //while(ADC_GetCalibrationStatus(ADC1));等待校准完成2 V" ~; C& Q4 x- J6 V3 y6 \
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- //ADC_SoftwareStartConvCmd(ADC1,ENABLE);ADC1的软件转换使能(注:这些注释的部分我放到主函数里了,放在这里也行,只不过,我感觉我那样便于理解)
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. H- ^& f0 a5 ?! {" j5 k1 p, ]5,中断服务函数
9 J; e3 s5 _- g8 Q8 m) ^$ v- void USART1_IRQHandler(void)
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- if(USART1->SR & USART_SR_TC)判断是否能发送数据
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- USART1->DR = TxBuff[TxCount++];笔者将转换到的电压值存到TxBuff[0]中了
' x/ x5 ^8 [5 s3 V - if(TxCount == Count)等到传完一次数据,就退出中断. m& X) W/ D" n1 Z1 Z/ b1 ?
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- USART1->CR1 &= ~USART_CR1_TXEIE;
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6,主函数, }0 X" i, L7 C# Z: y
- int main()1 I' B$ s! W2 b
- {
, N0 M2 H. x: f( g - usart_init();串口初始化) k* o: M b% ~1 }9 N, B" | s$ {* \1 ~
- nvic_init();中断初始化
/ L5 {$ N) P$ I3 W3 z - dma_init();DMA初始化" D$ O5 h( e* i- Y1 k
- adc_init();ADC初始化
6 C- Y- F. ^) K% A- G - DMA_Cmd(DMA1_Channel1,ENABLE);//见上文" F0 u# Z% W! M, } P. w
- ADC_DMACmd(ADC1,ENABLE);同上: ]- w) S0 @& ~- c
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+ l' w! H5 j3 s3 L" K: v* m2 C8 X - ADC_Cmd(ADC1,ENABLE);同上
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- ADC_ResetCalibration(ADC1);同上' X5 { Y, v! E/ v
- while(ADC_GetResetCalibrationStatus(ADC1));同上
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6 i3 S; C* q$ @4 c5 i - ADC_StartCalibration(ADC1);同上9 g( ^ g; ]1 @6 J
- while(ADC_GetCalibrationStatus(ADC1));同上
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- ADC_SoftwareStartConvCmd(ADC1,ENABLE);同上) I; D$ q( J" Q6 _3 e; F
- while(1)循环打印电压值4 U. l* M% W# t1 z, P
- {
6 _* {3 g& {0 M6 E2 I, m - Voltage_Printf();用于打印电压
4 k/ X% k. {) O7 q - //PrintString("\r\nprint data!!\r\n");3 s/ A/ }( F# @* K, M' E3 }( N
- delay(1000);延时8 R" [. ?" V! B2 P* Z3 m
- }
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6 T9 M6 V" s, d) `- void Voltage_Printf(void)' c# m# R q" A/ f' o' z7 E
- {
+ A9 S7 G: M9 L: a0 H7 l - Battery = (uint16_t)(2.0f *ADC_Value[0] / ADC_Value[1] *1.2f * 100);根据参考电压按比例计算电源电压
: R5 a& l& j) W! p' r - PrintString("\r\n当前电压值的一百倍:");: ?/ U( L- x* `+ \" l6 O
- PrintU16(Battery);
9 g4 @* g6 W0 d5 j0 | - PrintString("V");
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下面粘贴完整代码( m2 y7 y' Q6 ~7 I6 K! h
- #include<stm32f10x.h>) I% {* W1 V; h
-
6 I( _+ Z- J/ r0 G9 H2 j( z - uint16_t ADC_Value[2];
8 t" F0 e/ t% i X) k- f) L/ b - static uint16_t Battery=0;
" Z6 f4 E& q5 W) n$ [1 i( Y - uint8_t TxCount = 0;
5 X$ o. X; Q! \6 m/ ~, Y0 j# n( K - uint8_t Count = 0;
! s) @1 L( {( D6 T) f- Y5 o- }6 n& e - static uint8_t TxBuff[250];1 ]5 G, L! R, _/ h" E
- volatile uint8_t RxBuffer[50]; W1 A: _8 \& X0 E6 X8 h" H
-
/ A3 j. ^' n2 @/ F1 q8 C - void delay(uint32_t n)# B) z# e# F; p, u
- {$ N# s0 _' f9 `. F. R r
- int i,j;
& g! H' D# a, l) j A8 V p - for(i=0;i<n;i++)
* B z* H( v7 p7 Q2 t. P - for(j=0;j<8500;j++);8 e0 V: B; r% z1 _' K
- }
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' J; d6 E6 D) X: u7 J+ Q y+ x - void usart_init(void)
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- GPIO_InitTypeDef GPIO_usart;
3 S! o* L- U; _1 f - USART_InitTypeDef USART_usart;3 B9 h( t/ ^3 a& S' U
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- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1 ,ENABLE);
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- GPIO_usart.GPIO_Pin = GPIO_Pin_9;/ L7 q) n+ P0 \
- GPIO_usart.GPIO_Mode = GPIO_Mode_AF_PP;
, |" T; j9 G8 f# r - GPIO_usart.GPIO_Speed = GPIO_Speed_50MHz;6 _* `. d$ |: h7 {8 T9 ~8 ~
- GPIO_Init(GPIOA,&GPIO_usart);
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2 ?; c- L# T9 m( f - GPIO_usart.GPIO_Pin = GPIO_Pin_10;
2 \' L0 t3 a( Z3 \ F0 ~ - GPIO_usart.GPIO_Mode = GPIO_Mode_IN_FLOATING;4 a+ d# _6 F( m8 S/ i
- GPIO_usart.GPIO_Speed = GPIO_Speed_50MHz;
) e3 D. V+ P8 q - GPIO_Init(GPIOA,&GPIO_usart);1 H* D O' Z8 R! [' U. d: s
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- USART_usart.USART_BaudRate = 115200;; [( P( i4 A! q4 Z5 K; v$ Q
- USART_usart.USART_WordLength = USART_WordLength_8b;3 a& `9 Q7 a$ o% t* e& f' R; s. ], w
- USART_usart.USART_StopBits = USART_StopBits_1;
" A3 K) S0 L: Q2 B2 R& X - USART_usart.USART_Parity = USART_Parity_No;8 Y+ U8 ?, B+ q! D B
- USART_usart.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
/ p5 d; O4 O3 J4 b/ a - USART_usart.USART_Mode = USART_Mode_Tx;7 i8 I8 N3 M% C2 h; J0 D
- USART_Init(USART1,&USART_usart);: _ d, G0 L7 D( A: I! ?( [; x3 |
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, I; t+ Z0 ]; V, _# R4 s2 A - USART_Cmd(USART1,ENABLE);
1 Z$ d) `0 `2 f0 h% P - USART_ClearFlag(USART1,USART_FLAG_TC);4 |4 p- Y# `8 i& o
- }
+ @# B4 |- F7 M j6 B1 I: x5 l -
( c. U. @0 d- E: M - void nvic_init(void)
) [1 }2 g+ Y/ ~2 D8 a9 a - {
5 w; W" p3 B* C5 u0 V' Y5 G! H8 l e - NVIC_InitTypeDef nvic_usart;3 D1 r+ P2 z1 Z% y9 K# B" j
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
4 ]+ i4 P: ^5 }. C) u - nvic_usart.NVIC_IRQChannel = USART1_IRQn;
* b3 U4 D" e- K( f - nvic_usart.NVIC_IRQChannelPreemptionPriority = 1;/ F/ f0 v! P( @# A
- nvic_usart.NVIC_IRQChannelSubPriority = 0;6 |; J. U( Q4 W0 Z# g. p. F
- nvic_usart.NVIC_IRQChannelCmd = ENABLE;0 T0 \7 S$ p+ Z2 u
- NVIC_Init(&nvic_usart);
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- void dma_init(void)# i) L0 C' C+ h, F- p' ^
- {1 j4 A- ~7 E; @
- DMA_InitTypeDef dma;
2 y, u0 g3 s& ^. Q% I - RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);; A5 E6 N/ A4 _' z5 t
-
9 a/ [ Y6 d- d1 { - DMA_DeInit(DMA1_Channel1);' s1 s1 J# [% ~, d
- dma.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;7 }6 h* m# T+ @, k1 n+ [: y! ^
- dma.DMA_MemoryBaseAddr = (uint32_t)ADC_Value;0 Z1 k' \" q+ ^
- dma.DMA_DIR = DMA_DIR_PeripheralSRC;2 R# ], m4 o9 t2 v5 M* i
- dma.DMA_BufferSize = 2;
- |9 ?; T% e$ I$ c2 m - dma.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
' u% j; _! U; [& v1 h - dma.DMA_MemoryInc = DMA_MemoryInc_Enable;
L, C. A5 h: b$ d E0 A) } - dma.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
% Z: o1 u1 ?% a8 i9 `& ~2 U( X4 z) B - dma.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
& s5 Z' @, V) Z3 J j - dma.DMA_Mode = DMA_Mode_Circular;) }/ G+ c5 C' H0 |1 n
- dma.DMA_Priority = DMA_Priority_High;4 q! o0 A# z- p, J6 n
- dma.DMA_M2M = DMA_M2M_Disable;
9 r- y# i* H, i( L. j - DMA_Init(DMA1_Channel1,&dma);, ]) T$ m& X$ {( Z+ E8 j
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- //DMA_Cmd(DMA1_Channel1,ENABLE);
' J+ e3 |; F# {( `0 e3 g5 l - }3 X: I" |. A$ b# |
- void adc_init(void)3 f; N% T* M. G$ ?/ z( w
- {
, U+ T2 m9 `# t% z4 F( F8 Y - ADC_InitTypeDef adc;2 F5 ?3 Q7 P6 i1 S+ y/ o
- GPIO_InitTypeDef adc_gpio;
$ P) J/ B( T% W, v - RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB,ENABLE);
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- adc_gpio.GPIO_Pin = GPIO_Pin_1;
" Q0 c( R/ i% M; R3 ]4 D$ J - adc_gpio.GPIO_Mode = GPIO_Mode_AIN;
( F$ \" S7 P; ^% e, [+ J3 ~: W; O - GPIO_Init(GPIOB,&adc_gpio);
* X5 {& P1 a2 q7 O& d! a$ r - - V7 g4 e* U- B2 S8 {0 u6 z) K
- ADC_DeInit(ADC1);
2 [6 i7 ^! ~9 u) W" e - ADC_TempSensorVrefintCmd(ENABLE);: t7 \. ^& N# m
- adc.ADC_Mode = ADC_Mode_Independent;$ w! F# I/ A% |( t
- adc.ADC_ScanConvMode = ENABLE;
) }: q/ j* v% ~0 N# [6 u - adc.ADC_ContinuousConvMode = ENABLE;1 L2 W3 X* R5 z# h9 Y- x1 G f8 b
- adc.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;0 J: O* P( n: s
- adc.ADC_DataAlign = ADC_DataAlign_Right;
6 J! f+ A- y& M9 g! p - adc.ADC_NbrOfChannel = 2;) y7 a4 W$ J% ]$ L
-
/ \6 g/ ]& J1 v' Y# H - ADC_Init(ADC1,&adc);/ g" g- S5 r) k k7 P9 F5 ~
- . {1 w& a/ V7 i9 n, y
- ADC_RegularChannelConfig(ADC1,ADC_Channel_9,1,ADC_SampleTime_239Cycles5);# ?8 F$ P# U& D i* K4 Q9 B
- ADC_RegularChannelConfig(ADC1,ADC_Channel_17,2,ADC_SampleTime_239Cycles5);
2 L" i' J+ L4 |7 b - . V' ]( `2 }) Z. F0 a) f- F
- //ADC_DMACmd(ADC1,ENABLE);
, a. T8 [" S8 c9 j ~ - $ v' f/ Y$ _% E' L& e2 V7 _
- //ADC_Cmd(ADC1,ENABLE);- C+ Z7 k8 T* `9 @7 w4 P( I. L
- * h. ^" P) H8 u- M! i. O
- //ADC_ResetCalibration(ADC1);
2 N. ?- {1 j( V+ p- v - //while(ADC_GetResetCalibrationStatus(ADC1));: K, ?& w' Y c; \- ]
- ' `4 h3 \; l8 r+ N: \
- //ADC_StartCalibration(ADC1);: |4 D6 N) _0 }* {
- //while(ADC_GetCalibrationStatus(ADC1));
2 b6 Z2 k9 S+ G5 \; O' ^ -
) {9 o9 R" R9 V" ?# G2 ] - //ADC_SoftwareStartConvCmd(ADC1,ENABLE);
# T& M$ S x3 l) X7 s P8 x - }! k+ ?) V1 J$ i5 \
- void PrintHexU8(uint8_t data)
: N) H1 f; C1 u& o5 J: b - {
* X6 J/ B2 B0 e9 [& ? - TxBuff[Count++] = data;7 y# k, t4 v0 b6 z% n
- if(!(USART1->CR1 & USART_CR1_TXEIE))9 M2 A4 L& Q+ ^1 l5 e3 Y' i* Q
- USART_ITConfig(USART1,USART_IT_TXE,ENABLE);1 O4 \+ M. l) T6 a
- }
* A1 r V6 \; Y; x3 z. x& N -
0 H _- B3 G- y% q# n" w - void PrintString(uint8_t *s)
+ O% m+ ~# R8 f6 Y - {
" t* B/ \( p4 G8 J( ]# [' E% h - uint8_t *p;
3 {0 L2 K" N$ F, y - p=s;3 P# I9 s# p; x- r( N
- while(*p!= '\0')* o( z8 P* X# U9 j7 B4 }
- {! s$ A! S, k# p" w! A% g, u+ f
- PrintHexU8(*p);/ [( t7 |5 x3 z7 n' \
- p++;2 z0 O& m" g! T% j: Z
- }
+ j# G* |7 @8 C7 X2 {% P6 t( _! s - }
" x+ i2 h/ x; ?/ j2 T" I - 2 A5 t/ p8 Z d/ {
- void PrintU16(uint16_t num)
' M+ r9 }. Y/ f; _! M - {
% |/ V+ ^: t5 E0 } - uint8_t w5,w4,w3,w2,w1;
9 m( C; p8 c) }6 c! A - w5 = num % 100000/10000; 5 o7 o. G- Q K" j
- w4 = num % 10000/1000;
% s u) @* z/ [" U0 r1 g( |9 x - w3 = num % 1000/100;
1 a+ J) R& ^, g3 ]3 v0 `! q' A C - w2 = num % 100/10; 7 |9 q" {/ B1 X8 G v
- w1 = num % 10;
* Y u. N! r! n0 J - PrintHexU8('0' + w5); 0 ?+ c) Q( P1 g' T9 F! _
- PrintHexU8('0' + w4);
# x; X; J7 P' X4 r# J! f - PrintHexU8('0' + w3);
$ ], b4 V7 p: n7 x' F - PrintHexU8('0' + w2); " d/ }( J( Q, x: x# {: `0 X" A
- PrintHexU8('0' + w1); 8 Z/ Y4 q* S3 |4 Y" `: K( d
- }
! {- P! F8 S: m$ `! G! } -
i+ ]8 _" _3 r5 ~7 x3 h - void Voltage_Printf(void)
5 U% }& l3 {/ V/ ^9 v+ F: u - {
" T- f: k2 R0 w3 H2 H! _ - Battery = (uint16_t)(2.0f *ADC_Value[0] / ADC_Value[1] *1.2f * 100);
# z0 ^( D6 k' J e- r - PrintString("\r\nµ±Ç°µç³Øµçѹֵһ°Ù±¶£º");) C, K9 A$ D. T- p
- PrintU16(Battery);
% ^1 y" F/ g F( s2 c - PrintString("V");8 ]6 a1 Y8 d4 V5 X; ]4 `! O
- }8 y3 P/ X$ E o
- int main()
' D: n* w- J" y; A6 y - {
1 [& R. L' a0 H9 j9 U* i9 T - usart_init();
) z3 \/ s# D3 f* [- Z. F - nvic_init();
) h8 ?5 f# Y& ~ - dma_init();
! F( Z9 k, U" j0 u- F, _ - adc_init();# b( j U3 }4 M& E5 q6 S
- DMA_Cmd(DMA1_Channel1,ENABLE);
" c7 u i1 E- r, L: f8 ]8 J - ADC_DMACmd(ADC1,ENABLE);
/ V/ z9 J2 R4 x -
0 }, B: X0 A- k. m# c) X$ O% P- q3 g& Q - ADC_Cmd(ADC1,ENABLE);
- G' N, T4 p8 H% t - $ l' Z5 [- ]( L3 M' Q
- ADC_ResetCalibration(ADC1);
3 x9 j8 Q) `( q1 \ D- p! U - while(ADC_GetResetCalibrationStatus(ADC1));" {) M' {8 ?& F0 I8 Z) W3 [; g; n/ A
- # [" P* i5 P& U& \
- ADC_StartCalibration(ADC1);
6 l8 A" ]: g& T$ x0 I7 M - while(ADC_GetCalibrationStatus(ADC1));7 X3 {) ^# g& Q9 e5 y8 w l
- + c. S" _. i& U m) w( g* V2 n$ R
- ADC_SoftwareStartConvCmd(ADC1,ENABLE);8 ?+ C1 Z; g$ t
- while(1)
% d/ T" u- X4 W3 o9 S - {' t+ G/ B5 B$ x+ j) l2 k3 P/ ^
- Voltage_Printf();# v; B3 R( U% K
- //PrintString("\r\nprint data!!\r\n");1 d5 I* E$ w4 U# n
- delay(1000);* {4 Y4 ~( o9 \+ M7 I# H- i3 X
- }% g8 C; T- E( Q) G' k( @( X" S
- }) A; ~* u q4 v3 h% h
-
1 R& a' S5 F3 Y - void USART1_IRQHandler(void) e2 b0 g# @# h- m
- {: ^: Q0 [3 j5 q+ D* ?- T1 p
- if(USART1->SR & USART_SR_TC): p% A% _4 i& N8 n0 D9 m& E
- {
/ m) z- {/ D2 B1 j* p8 }( J5 e - USART1->DR = TxBuff[TxCount++];
1 \) f- G# G9 T" B( W7 K3 [ - if(TxCount == Count), r2 R t! x/ T1 g2 e* f, y
- {
! u; _) f, s3 v" F9 U( h) b - USART1->CR1 &= ~USART_CR1_TXEIE;0 Z! O: i9 L1 S$ D/ H0 `1 {% c
- } h) \9 C0 m' Y1 u! }& @* L
- }
' D$ X& J2 P: i - 5 Y3 E2 p4 S/ E1 z/ U3 X% X# ~
- if(USART1->SR & USART_SR_RXNE)' V: c4 u0 W6 i- H% d
- {
- n2 I: e+ }, q; ~1 A+ a - volatile int8_t com_data;8 U d7 q% `* ?/ ?
- com_data = USART1->DR; A* j! }- {1 \' g* L8 [- D
- }/ i0 y. J5 n7 H, e# V* G, ^
- }
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