一,ART-Pi 是什么
' b/ K2 E3 f2 q. w" d; j. PART-Pi 是 RT-Thread 团队为嵌入式软件工程师、开源创客设计的一款极具扩展功能的 DIY 开源硬件。致力打造一个开源的软硬件平台。详细资料都可以从 ART-Pi主页 来获取。3 u: `5 U. k' T
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二,ART-Pi 全速运行时的温度; M& z/ L% G N6 H9 J
相信每一位第一次使用 STM32H7 系列 MCU 的用户都会被他的发热量吓到,内心 OS:这个板子是不是有问题,第一次遇到这么热的 STM32。时间长了的用户都会知道只要手还能摸得住说明就是正常的。但是这个温度到底是多少呢?0 O, `. \0 g( L, |' I, C4 s9 T3 v5 d
因此我做了一个读取 MCU 内存温度的实验4 r" p; }, s& g& r; [" n$ {4 o
主频为 480M 时的温度:- [40978145] D/board: System Clock information
% k2 u2 Z8 b3 O% ]1 [! C1 w - [40978153] D/board: SYSCLK_Frequency = 480000000 _0 S, y# M% j* L8 r6 {3 p8 B+ E
- [40978162] D/board: HCLK_Frequency = 240000000
5 [% |( P8 R, ~9 R' p6 K - [40978171] D/board: PCLK1_Frequency = 120000000# E3 C6 ^' ], E
- [40978180] D/board: PCLK2_Frequency = 1200000001 S$ H/ e) M6 k4 j
- [40978188] D/board: STM32H7 temp is 49.610136
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k) s, j. t3 F$ D7 ?! _/ Q9 G1 q主频为 120M 时的温度:) w' p6 Y! n3 g& D
! R9 e$ C, s9 o6 }0 t9 A% n- [33922714] D/board: System Clock information
! ?/ N2 y" e0 z' f# Q( o9 h: @/ U" i X - [33922722] D/board: SYSCLK_Frequency = 1200000009 I, ?9 {7 Q, l! \$ ? ?+ `
- [33922731] D/board: HCLK_Frequency = 60000000" }9 e P. {( B
- [33922740] D/board: PCLK1_Frequency = 30000000
2 m8 ~9 c" ?" F" S: Q - [33922749] D/board: PCLK2_Frequency = 30000000
+ u7 u, z' x' [' }# M* E4 K/ [! D7 i - [33922758] D/board: STM32H7 temp is 32.261209
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如何实现测量 STM32H7 的内部温度:
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在 CUBEMX 中打开 ADC3-IN18 的测量引脚,这个是自带的测量温度通道:5 f. B. v9 ~' ]6 r
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温度的计算公式5 `$ E& q1 U% W
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TS_CAL2 的值保存在 :0x1FF1E840
: w- Y" P) f9 ]* t4 K' c( ^# QTS-CAL1 的值保存在:0x1FF1E8209 T: u8 G* ^6 ~7 Y' K
) l* }# S! n0 |1 v所以可得
" y& b' x! Q2 W6 r; ^, p- adc_v = HAL_ADC_GetValue(&ADC3_Handler);
9 e1 w8 J, f" K5 w& h1 E2 k9 m P - adcx = (110.0-30.0)/(*(unsigned short*)(0x1FF1E840) - *(unsigned short*)(0x1FF1E820));
0 ]/ j+ A+ u5 ` - temp = adcx*(adc_v - *(unsigned short*)(0x1FF1E820))+30;
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ADC 的初始化3 W% }6 H W* k
ADC 的初始化代码就比较常规了,简单的测试也就不需要使用 DMA 等配置0 t5 U0 M7 B) R9 |' V
- ADC3_Handler.Instance=ADC3;4 G4 Q: {+ ]8 w3 ?7 v9 [, Q
- ADC3_Handler.Init.ClockPrescaler=ADC_CLOCK_SYNC_PCLK_DIV4;
8 h7 K; R0 c: {' _" ]" g* j, l - ADC3_Handler.Init.Resolution=ADC_RESOLUTION_16B;
! s0 m! d# I) S, ~# M' J1 C - ADC3_Handler.Init.ScanConvMode=DISABLE;* K' ]+ o/ @" M9 u
- ADC3_Handler.Init.EOCSelection=ADC_EOC_SINGLE_CONV;! L0 j6 Z5 \8 c0 g
- ADC3_Handler.Init.LowPowerAutoWait=DISABLE;
# z# p4 ^, ^) L4 D+ O1 w. V5 l - ADC3_Handler.Init.ContinuousConvMode=DISABLE; ( }2 J+ c' _7 u, f B
- ADC3_Handler.Init.NbrOfConversion=1;
$ M, W8 M& o! v4 ?- z0 \" [0 W4 p - ADC3_Handler.Init.DiscontinuousConvMode=DISABLE;
$ | y: |8 F$ s s/ S8 D- E - ADC3_Handler.Init.NbrOfDiscConversion=0;+ I3 {( t' _! v5 n9 b! {
- ADC3_Handler.Init.ExternalTrigConv=ADC_SOFTWARE_START;
' |' ^! @) j% s+ r - ADC3_Handler.Init.ExternalTrigConvEdge=ADC_EXTERNALTRIGCONVEDGE_NONE;
% d/ ~4 M0 ]8 V' s( g( Z7 ?. w4 R - ADC3_Handler.Init.Overrun=ADC_OVR_DATA_OVERWRITTEN;
5 w0 n0 Q+ I9 N: T - ADC3_Handler.Init.OversamplingMode=DISABLE;
. Z* |0 A& P, C( f: w* x ~ - ADC3_Handler.Init.ConversionDataManagement=ADC_CONVERSIONDATA_DR;4 s" N1 l" u6 r) s- Z
- HAL_ADC_Init(&ADC3_Handler);. U$ h: m J; K* }
7 l, O; S% u( f- HAL_ADCEx_Calibration_Start(&ADC3_Handler,ADC_CALIB_OFFSET,ADC_SINGLE_ENDED);
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5 r+ m3 o9 v2 P5 \4 r- ADC_ChannelConfTypeDef ADC3_ChanConf;) Y2 x X* R( u6 t) J( _ B
. s; ?* \+ g7 I0 l" F- ADC3_ChanConf.Channel=ADC_CHANNEL_TEMPSENSOR;- v# T- q4 o" O3 v& U# g/ |
- ADC3_ChanConf.Rank=ADC_REGULAR_RANK_1;, _9 Y: I9 I+ f9 A$ n6 b
- ADC3_ChanConf.SamplingTime=ADC_SAMPLETIME_810CYCLES_5; $ v$ w/ i9 \; h7 z
- ADC3_ChanConf.SingleDiff=ADC_SINGLE_ENDED; O1 t9 q( b. H3 [9 _7 e
- ADC3_ChanConf.OffsetNumber=ADC_OFFSET_NONE;( I9 ]. a; y& j0 \
- ADC3_ChanConf.Offset=0;
, b) t, U7 ^( T ^2 [* o - HAL_ADC_ConfigChannel(&ADC3_Handler,&ADC3_ChanConf);
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- return 0;
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获取温度与系统时钟的频率+ z5 |0 f7 Q5 R
- unsigned int adc_v;
* j- A$ V+ ?4 A8 l. P; k - double adcx;
+ v% V0 }5 W1 W/ P0 P, K - double temp;9 ^9 L. `* g( w
1 D% z8 U/ v' Y- e( ?, V- HAL_ADC_Start(&ADC3_Handler);
# ^& |8 z6 K8 f0 |! F - HAL_ADC_PollForConversion(&ADC3_Handler,10);: {& P( }" b& \( a9 m$ d3 D" T
% a$ \( s2 @% r; b1 I: P6 B- LOG_D("System Clock information");
& a8 P1 j5 N8 N- ~5 ] - LOG_D("SYSCLK_Frequency = %d", HAL_RCC_GetSysClockFreq());
4 S; j+ q* N4 f- h0 }* M2 N0 s9 \8 ^ - LOG_D("HCLK_Frequency = %d", HAL_RCC_GetHCLKFreq());6 {" d7 c5 n7 o# ? }) L. ]
- LOG_D("PCLK1_Frequency = %d", HAL_RCC_GetPCLK1Freq());4 u% k1 V+ w) f9 U: |" ~# |
- LOG_D("PCLK2_Frequency = %d", HAL_RCC_GetPCLK2Freq());
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- adc_v = HAL_ADC_GetValue(&ADC3_Handler);: @: n8 r- {0 D
- adcx = (110.0-30.0)/(*(unsigned short*)(0x1FF1E840) - *(unsigned short*)(0x1FF1E820));
# w0 ]' O0 ]! `: M - temp = adcx*(adc_v - *(unsigned short*)(0x1FF1E820))+30;
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- LOG_D("STM32H7 temp is %f",temp);
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三,未完待续$ q K; |2 n0 g" F- |) a3 l
后续测试了不同频率,不同编译器,不同优化选项的性能对比,后续结果放在了传送门, 整个测是工程也开源在了 GITEE,欢迎 Start.& F9 a* R5 b, @/ q( h
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