之前要做一个电量计，采用INA219电流检测芯片，参考了网上大神的代码后发现在STM32上可用，移植到STM8后不可用，后来找到了官方的示例demo，综合网上大神代码调试后成功驱动，测电流、电压、功率，精确度很高。

现在分享出来供大家参考，直接贴代码：

main.c

1. int main(void)
   - g$ t$ H9 L: q  ]# G% o
2. {
   
3.     ina219_init();
   
4.    
   4 Y+ ?  J" a( i, S# V8 F& U+ J
5.     while(1)
   
6.    {  
   8 ^- n3 ]1 m- d: U
7.         //根据具体需求调用检测电流电压的函数
   
8.    }  
   
9. }

复制代码

ina219.c

1. #include "ina219.h"
   
2. 
   
3. u8  ina219_busVolt_LSB_mV = 4;   // Bus Voltage LSB value = 4mV
   ; Q- J1 L$ H4 r7 m$ u
4. u8  ina219_shuntVolt_LSB_uV = 10;  // Shunt Voltage LSB value = 10uV
   
5. unsigned short ina219_calValue = 0;
   
6. 
   9 {% n# Q. i- z0 b
7. u32 ina219_current_LSB_uA;
   
8. u32 ina219_power_LSB_mW;
   4 A$ S( x$ N9 a9 O
9. 
   
10. INA219_DATA ina219_data;
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11. 
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12. void INA_SCL_OUT(void)
    , z: {! i4 j% `* Z; `1 @
13. {
    ' W' z3 I7 u3 ]$ i4 ^
14.     GPIO_InitTypeDef  GPIO_InitStructure;
    
15. 
    
16.     RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);
    ! U3 p! \5 D/ K. B+ r8 A0 c; e
17.    
    " M) g. X$ A& h2 l- }
18.     /* Configure I2C1 pins: PB12->SCL->OUT */
      k+ O* F% h8 F: [# x( n
19.     GPIO_InitStructure.GPIO_Pin = INA219_I2C_SCL_PIN;
    
20.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    
21.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    1 }' \) x% \0 q0 I' z: X  n; _
22.     GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);
    
23.     GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SCL_PIN);
    ! v- P1 ]% {  l
24. }
    
25. 
    $ n3 v0 ]: Q$ a, j$ `) R6 F
26. void INA_SDA_OUT(void)
    * w! H- P* |6 u: i4 @6 W: |% _5 I. [% ^
27. {
    
28.     GPIO_InitTypeDef  GPIO_InitStructure;
    
29. 
    
30.     RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);
      b' X/ T' g* e; K) w$ C, w
31.    
    , I" D$ Q/ b1 Q2 A% R8 c
32.     /* Configure I2C1 pins: PB14->SDA-OUT */
    ; Y/ p8 Y; [: O3 \4 I+ C
33.     GPIO_InitStructure.GPIO_Pin = INA219_I2C_SDA_PIN;
    * P1 {$ x1 D0 G+ X$ T
34.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    9 a' W+ V4 h% o8 }6 U+ ~0 u, I
35.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    
36.     GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);
    9 r4 c& r6 s1 r- m# G& g3 n( M
37.     GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SDA_PIN);
    
38. }
    
39. 
    9 P/ N# C3 B9 d- |: A
40. void INA_SDA_IN(void)
    
41. {
    
42.     GPIO_InitTypeDef  GPIO_InitStructure;
    ! o/ p- N1 Z) w1 ?8 z
43. 
    6 M3 ]0 U" ~3 N7 A% H* \) \% I6 e
44.     RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);
    , P5 X* w6 u+ p7 `$ t# D
45.    
    . p& _8 u& p5 o9 w
46.     /* Configure I2C1 pins: PB14->SDA-IN */
      L* K  Z4 q4 R9 _+ x) q. h
47.     GPIO_InitStructure.GPIO_Pin = INA219_I2C_SDA_PIN;
    % B6 s3 ]( E5 I: E& @! Q
48.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    & M7 A9 _. L  L9 |' G
49.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    
50.     GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);
    6 p7 z: a* V" B4 I
51. }
    
52. 
    5 w1 r# S* a8 o+ {
53. void INA_IIC_Start(void)
    : S# R' b4 N& B( u. k* F
54. {
    7 `+ i2 [1 v/ J" [( i9 }( ?
55.   INA_SDA_OUT();
    , ]  T9 g: _4 g" V: S( V% x3 X
56.   INA_SCL_OUT();
    
57.   
    9 ^- M" K! i% }( S# o) N$ `
58.   INA_SDA_SET;
    
59.   INA_SCL_SET;
    
60.   INA_SDA_CLR;
    
61.   INA_SCL_CLR;
    
62. }
    
63. 
    
64. void INA_IIC_Stop(void)
    ( R) a2 Y% v. l' m
65. {
    8 G7 t9 e0 g# c9 [8 o0 l+ r" Y
66.     INA_SDA_OUT();
    . D( W; O4 W& G5 y9 Q& u
67. 
    
68.     INA_SDA_CLR;
    
69.     INA_SCL_SET;
    5 |& Y$ h" D/ b2 S5 Y6 |( x) c% j
70.     INA_SDA_SET;
    " Y( ^( r4 y% U1 D  M
71. }
    9 B% k4 h. g1 [! I; I
72. 
    
73. void INA_IIC_Set_Ack(unsigned char ack)
    # U$ c* R2 {% E. C) n' i. H$ @
74. {
    
75.     INA_SDA_OUT();
    4 D  h( K  Y3 t0 k+ }
76.    
    
77.     if(ack)
    
78.     {
    
79.       INA_SDA_SET;
    # A5 i4 t( V- \% d# z- `/ @1 y' }2 ]
80.     }
    / K! w, s$ y4 H  _4 }& y0 N, D& Y3 P
81.     else
    # t7 j! X3 ~' G" i* p
82.     {
    
83.       INA_SDA_CLR;
    & C- @1 i8 K( D9 ^* S
84.     }
    3 w2 Z+ J( X8 P; P' K- u
85.    
    ; f5 A% Z$ U# p
86.     INA_SCL_SET;
    * C- Z, d, j' v; _0 y: ?
87.     INA_SCL_CLR;
    
88. }
    
89. 
    
90. unsigned char INA_IIC_Get_Ack(void)
    0 F4 O& W: ~3 \, o7 s& i: g/ }
91. {
    0 H; l: `: i( {" @. q
92.     unsigned char ack;
    , w6 Q$ L1 A, u3 F
93. 
    , r0 W. n8 H2 p5 h
94.     INA_SDA_IN();
    ' v' C, h, v. Q
95.     INA_SDA_SET;
    ' ]/ U% W$ Q. ^1 m$ x; m8 }: l
96.     INA_SCL_SET;
    
97.     if(INA_SDA_TST)
    
98.     {
    
99.       ack = 1;
    
100.     }
     + W- T! u9 O* R3 N; B' L* \
101.     else
     
102.     {
     8 U" o+ y4 M5 ?- W
103.       ack = 0;
     
104.     }
     
105.    
     
106.     INA_SCL_CLR;
     2 }; L) M0 [7 _; V2 R8 `! n
107. 
     
108.     return(ack);
     
109. }
     
110. 
     ) o1 \" |& T! C1 ^$ Q' \
111. void INA_IIC_Write_8bits(unsigned char dat)
     
112. {
     ) p9 y: l* m1 A; h+ b' o! R- h- f6 d
113.   unsigned char i;
     # O5 s, G" T) X! U
114.   
     
115.   INA_SDA_OUT();
     
116.   for(i = 8; i; i--)
     0 S1 Y) f1 ^# |0 ^0 e- H* h! N
117.   {
     
118.     if(dat & 0x80)
     
119.     {
     
120.       INA_SDA_SET;
     
121.     }
     
122.     else
     $ W7 t7 z/ p8 O) \8 C7 A7 p2 }
123.     {
     . ?$ j/ [9 X4 t& Q$ x; D* S8 K
124.       INA_SDA_CLR;
     
125.     }
     
126.    
     
127.     INA_SCL_SET;
     
128.     dat <<= 1;
     5 H3 P; @; c/ ^: z
129.     INA_SCL_CLR;
     7 z# H) h3 S: ^) a8 G) I, i1 v
130.   }
     
131. }
     ! Z+ D5 P, h4 K* W2 I
132. 
     
133. unsigned char INA_IIC_Read_8bits(void)
     
134. {
     / I: F( f% m; C! H' W+ L
135.     unsigned char i, dat;
     
136. 
     
137.     INA_SDA_IN();
     
138.     INA_SDA_SET;
     ! ^, d) z# G  a2 s. y+ _& ^) F
139.     dat = 0;
     
140.     for(i = 8; i; i--)
     # U; w1 \4 F/ h+ Y8 l# T# s
141.     {
     
142.         INA_SCL_SET;
     1 ]5 G+ b# K8 t: v  ]! O
143.         dat <<= 1;
     
144.         if(INA_SDA_TST)
     9 H, P) _* Z5 w& o
145.           dat++;
     
146.         INA_SCL_CLR;
     
147.     }
     
148.    
     9 v/ h8 ~+ K# j) I8 G
149.     return(dat);
     
150. }
     3 m1 M7 z0 U0 L# r& w1 u8 h
151. 
     
152. void INA_IIC_Write_Byte(unsigned char reg, unsigned char dat)
     
153. {
     2 ]* I* P' K# ?$ L% U
154.   unsigned char dev = INA219_I2C_ADDRESS;
     
155.   
     
156.   INA_IIC_Start();
     
157.   
     ( c5 P. V) N1 d% {! G# R& k4 B7 \, s
158.   //  dev &= ~0x01;
     . S2 }* u! w& P: p4 y/ _: A
159.   INA_IIC_Write_8bits(dev);
     $ Q  t+ u/ a) C. m# g9 t( F
160.   INA_IIC_Get_Ack();
     
161.   
     ' N! }3 R6 _  f+ ~! l# b
162.   INA_IIC_Write_8bits(reg);
     + R# y5 b6 [* S  D/ `9 j
163.   INA_IIC_Get_Ack();
     * m* ?" I: j& @6 d
164.   
     6 o2 u( S9 @8 I) M
165.   INA_IIC_Write_8bits(dat);
     5 Q) [! z8 O+ |( k: f
166.   INA_IIC_Get_Ack();
     
167.   
     / y2 f5 i  q. w2 t" s
168.   INA_IIC_Stop();
     
169. }
     
170. 
     3 g9 q  \4 H5 |6 S& {5 i
171. unsigned char INA_IIC_Read_Byte(unsigned char reg)
     
172. {
     
173.   unsigned char dat;
     
174.   unsigned char dev = INA219_I2C_ADDRESS;
     
175.   
     , W# ^% ?3 V: s; s0 z8 i* S2 l
176.   INA_IIC_Start();
     
177.   
     
178.   //  dev &= ~0x01;
     
179.   INA_IIC_Write_8bits(dev);
     
180.   INA_IIC_Get_Ack();
     
181.   
     
182.   INA_IIC_Write_8bits(reg);
     " h# h  M% d  E/ g# K
183.   INA_IIC_Get_Ack();
     
184.   
     
185.   INA_IIC_Start();
     / K2 u6 O- N; r, R2 K/ N
186.   
     4 \! _- J7 J# Z# u6 F$ [7 ^6 P
187.   dev |= 0x01;
     
188.   INA_IIC_Write_8bits(dev);
     2 S% P6 I& \9 i1 A, c' T
189.   INA_IIC_Get_Ack();
     
190.   
       J) O% w3 [3 r# @- S
191.   dat = INA_IIC_Read_8bits();
     
192.   INA_IIC_Set_Ack(1);
     
193.   
     6 V% F0 O  F: _/ w- r( [0 g! d
194.   INA_IIC_Stop();
     
195.   
     1 z# F3 O2 }" H  g4 b/ D
196.   return (dat);
     
197. }
     
198. 
     
199. void INA_IIC_Write_Bytes(unsigned char reg, unsigned char *dat, unsigned char num)
     * c  ?1 |9 l  l3 U+ |
200. {
       o, ^7 A3 v" e7 u, e1 n
201.   unsigned char dev = INA219_I2C_ADDRESS;
     1 T% M" Y' E( @% [, _, W; s/ V9 e
202.   
     
203.   INA_IIC_Start();
     , E" X( ]& Q# J: D7 f
204.   
     : d* ~2 ?$ R, v$ f" l
205.   //  dev &= ~0x01;
     
206.   INA_IIC_Write_8bits(dev);
     / X. c9 `% x: Q. ?: [! I) [
207.   INA_IIC_Get_Ack();
     
208.   
     
209.   INA_IIC_Write_8bits(reg);
     
210.   INA_IIC_Get_Ack();
     ! c6 ^8 c" w6 w8 V
211.   
     
212.   while(num--)
     
213.   {
     
214.     INA_IIC_Write_8bits(*dat);
     
215.     INA_IIC_Get_Ack();
     0 o2 U6 z5 T  ]" {$ B" J+ _
216.     dat++;
     ) P. Q. z8 h' Y5 U. Q
217.   }
     / f- ?; C" |3 @* ?! x
218.   
     
219.   INA_IIC_Stop();
     
220. }
     
221. 
     " s' O) _: G* o0 }  R. X1 z) P# E
222. void INA_IIC_Read_Bytes(unsigned char reg, unsigned char *dat, unsigned char num)
     * a) d! H- |0 P2 B% t
223. {
     7 _# R" q  n8 f6 U  s! w
224.   unsigned char *tmp = dat;
     
225.   unsigned char dev = INA219_I2C_ADDRESS;
     1 I3 F8 S4 }: A7 [
226.   
     8 d' o- }2 X! N6 l4 y6 }! c
227.   INA_IIC_Start();
     
228.   
     4 d+ l1 |# T$ n9 h( E: i# H
229.   //  dev &= ~0x01;
     4 x& f/ o, a: Y% Q
230.   INA_IIC_Write_8bits(dev);
     5 K- ~5 k6 M4 Y  M7 U: N( D& P
231.   INA_IIC_Get_Ack();
     
232.   
     
233.   INA_IIC_Write_8bits(reg);
     
234.   INA_IIC_Get_Ack();
     
235.   
     $ q# T. f9 }0 C- \8 [. M7 t( `: L4 F
236.   INA_IIC_Start();
     
237.   
     
238.   dev |= 0x01;
     + N0 f  c, O: E! J# V2 E: [
239.   INA_IIC_Write_8bits(dev);
     
240.   INA_IIC_Get_Ack();
     
241.   
     ; @" e( s) f- [+ b
242.   while(num--)
     
243.   {
     
244.     *tmp = INA_IIC_Read_8bits();
     5 n/ q) p. h5 A4 w$ O  S# R
245.     if(num == 0)
     2 b5 c1 b6 A! V& t; p9 F* N: j$ |
246.       INA_IIC_Set_Ack(1);
     
247.     else
     
248.       INA_IIC_Set_Ack(0);
     1 m# J$ Q% {1 m) Z
249.     tmp++;
     4 I3 d# W( @2 b3 d0 u
250.   }
     
251.   
     $ X4 w0 q6 \- p. I+ ~
252.   INA_IIC_Stop();
     
253. }
     
254. 
     8 e- {3 Q* K! D/ I+ Q
255. void ina219_Write_Register(unsigned char reg, unsigned int dat)
     ( ]7 O* c, ?. r  i* A
256. {
     
257.     unsigned char val[2];
     * y3 ]: i- l6 y  I# ]$ _5 g' c
258.    
     ( _- `: _) r! M6 u6 m
259.     val[0] = (unsigned char)(dat >> 8);
     8 c- N: f9 I# b6 r: h& `; r
260.     val[1] = (unsigned char)(dat & 0xFF);
     
261.     INA_IIC_Write_Bytes(reg, val, 2);
     9 ^0 N9 |- K- N2 l4 p1 W
262. }
     + n: i3 M  s' _4 o2 T
263. 
     
264. void ina219_Read_Register(unsigned char reg, signed short *dat)
     
265. {
     
266.     //printf("read reg == %d\r\n",reg);
     
267.   unsigned char val[2];
     
268.   
     . U) f- x4 I+ C. J) \% _& _: h) W9 \
269.   INA_IIC_Read_Bytes(reg, val, 2);
     + K3 I+ @4 J: x) P7 s" N- _
270.   *dat = ((unsigned int)(val[0]) << 8) + val[1];
     
271.   
     , Y6 P: p, {2 Z! h; C$ R0 R' b" q
272.     //printf("data1 == %x\r\n",val[0]);
     
273.     //printf("data2 == %x\r\n",val[1]);
     ) u6 s+ q1 L& g# L9 J- Y, y) J
274.    
     # {6 F, ^0 Q9 d3 p( b
275. }
     
276. 
     
277. // INA219 Set Calibration 16V/16A(Max) 0.02¦¸
     
278. void ina219_SetCalibration_16V_16A(void)
     
279. {
     
280.   u16 configValue;
     9 }: v0 v! ~- X
281.   
     
282.   // By default we use a pretty huge range for the input voltage,
     
283.   // which probably isn't the most appropriate choice for system
     
284.   // that don't use a lot of power.  But all of the calculations
     
285.   // are shown below if you want to change the settings.  You will
     4 v; R# B3 j* O
286.   // also need to change any relevant register settings, such as
     2 v" r  d2 {( w" Z' l
287.   // setting the VBUS_MAX to 16V instead of 32V, etc.
     
288.   
     
289.   // VBUS_MAX     = 16V   (Assumes 16V, can also be set to 32V)
     * p$ s  a& K+ E& s1 m% o
290.   // VSHUNT_MAX   = 0.32  (Assumes Gain 8, 320mV, can also be 0.16, 0.08, 0.04)
     
291.   // RSHUNT       = 0.02   (Resistor value in ohms)
     3 e+ v* J* I* \3 p
292.   
     
293.   // 1. Determine max possible current
     ' Q1 s# P8 h& w. x
294.   // MaxPossible_I = VSHUNT_MAX / RSHUNT
     
295.   // MaxPossible_I = 16A
     
296.   
     
297.   // 2. Determine max expected current
     
298.   // MaxExpected_I = 16A
     % @; J+ h( [1 ?/ Q
299.   
     7 t6 t% b; {8 a% z# a; o( D
300.   // 3. Calculate possible range of LSBs (Min = 15-bit, Max = 12-bit)
     ! Z- H* v2 @. F! R- T8 F
301.   // MinimumLSB = MaxExpected_I/32767
     " `- w/ n" l! b5 Y! {. `
302.   // MinimumLSB = 0.00048            (0.48mA per bit)
     
303.   // MaximumLSB = MaxExpected_I/4096
     2 ^9 {9 j# V# T2 q, b
304.   // MaximumLSB = 0,00390            (3.9mA per bit)
     8 F" i* W, R3 u3 S
305.   
     7 ^7 G: m, Y/ F# u; d
306.   // 4. Choose an LSB between the min and max values
     
307.   //    (Preferrably a roundish number close to MinLSB)
     
308.   // CurrentLSB = 0.00050            (500uA per bit)
     
309.   
     
310.   // 5. Compute the calibration register
     
311.   // Cal = trunc (0.04096 / (Current_LSB * RSHUNT))
     
312.   // Cal = 4096 (0x1000)
     5 r  }/ r" l: D
313.   
     
314.   ina219_calValue = 0x1000;
     5 y' k" j2 x0 q2 E( d
315.   
     1 k6 q5 V& A5 k6 R
316.   // 6. Calculate the power LSB
     3 \5 U( Y* |+ z9 N; X: P+ ~9 O
317.   // PowerLSB = 20 * CurrentLSB
     
318.   // PowerLSB = 0.01 (10mW per bit)
     
319.   
     
320.   // 7. Compute the maximum current and shunt voltage values before overflow
     
321.   //
     7 j" z& U) F2 D9 h
322.   // Max_Current = Current_LSB * 32767
     
323.   // Max_Current = 16.3835A before overflow
     * {- F, g* Z  D0 e9 C) B
324.   //
     5 O, o% N' a( N# ?& T
325.   // If Max_Current > Max_Possible_I then
     
326.   //    Max_Current_Before_Overflow = MaxPossible_I
     
327.   // Else
     
328.   //    Max_Current_Before_Overflow = Max_Current
     ) F/ m/ I4 j1 A! L+ Q6 k' ~7 h  q
329.   // End If
     " Q2 L# v9 D, r: J" _3 {' ~
330.   //
     
331.   // Max_ShuntVoltage = Max_Current_Before_Overflow * RSHUNT
     
332.   // Max_ShuntVoltage = 0.32V
     ! r4 A5 f: c4 ?4 p3 p5 @  u
333.   //
     
334.   // If Max_ShuntVoltage >= VSHUNT_MAX
     
335.   //    Max_ShuntVoltage_Before_Overflow = VSHUNT_MAX
     & ?4 w$ ^2 u( G# n9 S
336.   // Else
     
337.   //    Max_ShuntVoltage_Before_Overflow = Max_ShuntVoltage
     
338.   // End If
     
339.   
     
340.   // 8. Compute the Maximum Power
     4 }7 j+ b. W4 h$ s
341.   // MaximumPower = Max_Current_Before_Overflow * VBUS_MAX
     
342.   // MaximumPower = 1.6 * 16V
     " w+ _9 ?) `; n! \
343.   // MaximumPower = 256W
     ! m4 r/ v! M' A. X/ w/ Y2 B9 X4 E
344.   
     ! ], {' Z4 C1 T' n
345.   // Set multipliers to convert raw current/power values
     3 W$ v* |  O* U- y
346.   ina219_current_LSB_uA = 500;     // Current LSB = 500uA per bit
     5 p8 j9 i* ~9 i9 c- S  s
347.   ina219_power_LSB_mW = 10;        // Power LSB = 10mW per bit = 20 * Current LSB
     
348.   
     
349.   // Set Calibration register to 'Cal' calculated above
     
350.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
     
351.   
     
352.   // Set Config register to take into account the settings above
     ; Q* h: c7 [, E# ]
353.   configValue = ( INA219_CFG_BVOLT_RANGE_16V | INA219_CFG_SVOLT_RANGE_320MV | INA219_CFG_BADCRES_12BIT_16S_8MS | INA219_CFG_SADCRES_12BIT_16S_8MS | INA219_CFG_MODE_SANDBVOLT_CONTINUOUS );
     
354.   
     2 ^" @% G. J  r* ?! ~9 Z3 J, D
355.   ina219_Write_Register(INA219_REG_CONFIG, configValue);
     / u2 a( O) |4 C$ {. L# ]
356. }
     & \( A1 W) N; N0 J: e8 N" T! g+ M0 x
357. 
     ' j0 X% ]2 ]( S* k
358. void ina219_configureRegisters(void)
     ' n4 X) S  @5 s& L- j1 B- J) C
359. {
     
360.   DelayMs(15);
     
361.   
     ' F# C. Y1 z5 ?& B. M
362.   ina219_SetCalibration_16V_16A();
     " m& {. q( _; J5 F/ e: m
363. }
     
364. 
     
365. void ina219_gpio_init(void)
     5 }4 N2 F. u: K1 E
366. {
     7 _% g, I7 j6 P: L+ F
367.     INA_SCL_OUT();
     . E6 Y. p$ k6 g/ Z8 ]7 K
368.     INA_SDA_OUT();
     1 U" q  k% w0 `& j. N% E2 K3 S
369. }
     
370. 
     6 a& }6 {* P  r1 A# \! G
371. void ina219_init(void)
     
372. {
     % O+ r5 ~6 R! h7 B
373.   ina219_gpio_init();
     
374.   
     ; t( j% c5 y. y5 U6 U2 l" w1 }* u
375.   ina219_configureRegisters();
     2 R" k4 K$ Q! V- }& ^1 _
376. }
     
377. 
     
378. 
       c" H! J% y: S' B; \
379. /* ÕâÀïÒÔÉÏÊdzõʼ»¯º¯Êý */
     0 s% x% y3 W# ]; g
380. /* ´ÓÕâÀïÍùÏÂÊǹ¦Äܺ¯Êý */
     " V. J7 l$ S5 `$ T, j* Q; d
381. 
     9 L# U3 I; H, u, ]1 Z5 u" w
382. 
     
383. signed short ina219_GetBusVoltage_raw(void)
     ) U: B% [5 U0 C' [& Y+ i# K
384. {
     . s6 o7 k7 a( n( x; P: g0 }) p6 e6 p
385.   signed short val;
     9 j) n+ F- ~& ~: J5 s
386.   
     + X1 ^: B! ?' f$ p
387.   ina219_Read_Register(INA219_REG_BUSVOLTAGE, &val);
     
388.   val >>= 3;                      // Shift to the right 3 to drop CNVR and OVF
     
389.   
     
390.   return (val);
     ( N3 Q( f! r0 G# W3 l4 }
391. }
     7 [7 A/ H* e6 K% j0 V: Z
392. 
     
393. signed short ina219_GetCurrent_raw(void)
     / ^" o4 K. V# T7 F
394. {
     
395.   signed short val;
     # P% I  d4 A# p7 r
396.   
     
397.   // Sometimes a sharp load will reset the INA219, which will
     : b/ ]. z% l: J3 O& X1 Y5 J
398.   // reset the cal register, meaning CURRENT and POWER will
     " F$ l; w' ^3 z; z. u# M
399.   // not be available ... avoid this by always setting a cal
     
400.   // value even if it's an unfortunate extra step
     
401.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
     
402.   
     
403.   // Now we can safely read the CURRENT register!
     1 E, e' i2 b; f6 k& v9 m
404.   ina219_Read_Register(INA219_REG_CURRENT, &val);
     * k$ y/ Q6 C* D- I
405.   
     
406.   return (val);
     " t& V3 Y$ R) h; ~0 n& r
407. }
     # E2 L4 @2 m. P9 M0 Q$ J: {5 v" q9 u
408. 
       V2 D5 b% y/ B, P8 k) @
409. 
     
410. signed short ina219_GetBusVoltage_mV(void)
     $ T" q  U2 |+ m: w6 K6 y
411. {
     ' ~6 d) k# M8 R4 y$ \/ A* @& {
412.   signed short val;
     
413.   
     . S6 r( y* @  N4 Y" b% o
414.   ina219_Read_Register(INA219_REG_BUSVOLTAGE, &val);
     
415.   val >>= 3;                      // Shift to the right 3 to drop CNVR and OVF
     ; z5 P4 o; ]% X; d5 h5 |6 P
416.   val *= ina219_busVolt_LSB_mV;   // multiply by LSB(4mV)
     
417.   
     ) w, e3 }8 @) A5 k# {; `: z
418.   return (val);
     ; i2 b" W# L* F
419. }
     
420. 
     
421. s32 ina219_GetShuntVoltage_uV(void)
     
422. {
     
423.   s32 val;
     : V- l1 n. R4 J$ G8 l
424.   s16 reg;
     
425.   
     . L( l. ]0 R9 F
426.   ina219_Read_Register(INA219_REG_SHUNTVOLTAGE, ®);
     
427.   val = (s32)reg * ina219_shuntVolt_LSB_uV;   // multiply by LSB(10uV)
     
428.   
     
429.   return (val);
     : o8 K: B' c" I) C
430. }
     
431. 
     7 B6 B& I9 k* r+ P) X- k" B4 b( d
432. s32 ina219_GetCurrent_uA(void)
     
433. {
     
434.   s32 val;
     3 a6 G% C5 X" J- {, a; D
435.   s16 reg;
     , T7 n* l$ n9 p
436.   
     % v9 s6 U* X! s' \/ G1 m
437.   // Sometimes a sharp load will reset the INA219, which will
     ; F  G& o: |: ^# v- k7 z
438.   // reset the cal register, meaning CURRENT and POWER will
     # I, u" l0 `- u6 Z( `2 Z
439.   // not be available ... avoid this by always setting a cal
     $ E5 K; X- w' O( r$ x) M* Y
440.   // value even if it's an unfortunate extra step
     
441.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
     
442.   
     
443.   // Now we can safely read the CURRENT register!
     
444.   ina219_Read_Register(INA219_REG_CURRENT, ®);
     
445.   
     
446.   val = (s32)reg * ina219_current_LSB_uA;
     
447.   
     
448.   return (val);
     
449. }
     
450. 
     ' _8 q2 d1 d0 r
451. s32 ina219_GetPower_mW(void)
     9 y, {( J* E+ p& R& l, j+ Y- w
452. {
     
453.   s32 val;
     
454.   s16 reg;
     
455.   
     
456.   // Sometimes a sharp load will reset the INA219, which will
     
457.   // reset the cal register, meaning CURRENT and POWER will
     , q2 i: {8 n0 c  |- }8 D. L
458.   // not be available ... avoid this by always setting a cal
     ' b/ v" m$ F: E8 m0 D% _
459.   // value even if it's an unfortunate extra step
     
460.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
     / I+ ?* t& |; }4 g7 x8 T
461.   
     , z8 b6 X. ~+ t4 Y+ C" ?* B4 {$ |
462.   // Now we can safely read the POWER register!
     
463.   ina219_Read_Register(INA219_REG_POWER, ®);
     9 V. ^4 e& R% b
464.   
     
465.   val = (s32)reg * ina219_power_LSB_mW;
     
466.   
     
467.   return (val);
     , S, A5 k6 c* G( P4 ^
468. }
     ( k  e/ |/ w7 L$ S0 S
469. 
     
470. void INA_Process(void)
     
471. {
     
472.     if(INA219process_flag == Open)
     
473.     {
     ) F/ {( d3 Y* Q; Y
474.         INA219process_flag = Close;
     ) R* Y* o) m4 p% I
475.         
     
476.         ina219_data.voltage_ina219 = ina219_GetBusVoltage_mV();
     ! [- q/ U0 S1 Q% b* H, q. Y! \
477.         printf("voltage_ina219 is %d\r\n",ina219_data.voltage_ina219);
     ' {2 d6 W2 M0 c4 B6 J+ v* ]8 O
478.         
     0 ?( I- o$ `& r7 S6 Z
479.         ina219_data.shunt_ina219 = ina219_GetShuntVoltage_uV();
     
480.         printf("shunt_ina219 is %ld\r\n",ina219_data.shunt_ina219);
     
481.         
     
482.             
     
483.         ina219_data.current_ina219 = ina219_GetCurrent_uA();
     
484.         printf("current_ina219 is %ld\r\n",ina219_data.current_ina219);
     
485.         
     
486.         ina219_data.power_ina219 = ina219_GetPower_mW();
     
487.         printf("power_ina219 is %ld\r\n",ina219_data.power_ina219);
     
488.     }
     & t- o$ h$ _) j0 V; T
489. }

复制代码

- b# M' E4 Z% ~6 W

ina219.h

1. #ifndef __INA219_H
   1 c1 W+ v: R7 J7 z( l1 k8 q
2. #define __INA219_H
   
3. #include "main.h"
   # c- e: ?0 s3 D6 A/ _
4. 
   # C( A; N3 t- |6 h  m
5. #define INA219_I2C_PORT                        GPIOB
   
6. #define INA219_I2C_GPIO_CLOCK            RCC_APB2Periph_GPIOB
   
7. #define INA219_I2C_SCL_PIN                GPIO_Pin_12
   
8. #define INA219_I2C_SDA_PIN                GPIO_Pin_14
   ' a$ b+ ^; Y' G% \" H6 |. s
9. 
   * h& v- E$ @/ N( _* I8 e' O& n
10. #define INA_SCL_SET     GPIO_SetBits(INA219_I2C_PORT,INA219_I2C_SCL_PIN)
    3 L! |3 J  ?! S5 k2 W+ n8 z& B3 e, T0 z
11. #define INA_SDA_SET     GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SDA_PIN)
    
12. 
    ; B/ n5 Z  ?& ~( @) Y$ M
13. #define INA_SCL_CLR     GPIO_ResetBits(INA219_I2C_PORT,INA219_I2C_SCL_PIN)
    
14. #define INA_SDA_CLR     GPIO_ResetBits(INA219_I2C_PORT,INA219_I2C_SDA_PIN)
    3 Z; Z' f- u9 x6 S2 s5 [; W# p" n
15. 
    3 \3 U; a. ]+ J. \4 H0 k
16. #define INA_SDA_TST     GPIO_ReadInputDataBit(INA219_I2C_PORT,INA219_I2C_SDA_PIN)
    
17. 
    
18. /*----------------------------------------------------------------------------*/
    
19. // I2C Address Options
    # ~8 u% u' q5 |6 W; o+ \6 G+ b3 j. h7 ^
20. #define INA219_I2C_ADDRESS_CONF_0               (u8)(0x40 << 1)     // A0 = GND, A1 = GND
    
21. #define INA219_I2C_ADDRESS_CONF_1               (u8)(0x41 << 1)     // A0 = VS+, A1 = GND
    3 L2 i4 @# ]& C5 p
22. #define INA219_I2C_ADDRESS_CONF_2               (u8)(0x42 << 1)     // A0 = SDA, A1 = GND
    
23. #define INA219_I2C_ADDRESS_CONF_3               (u8)(0x43 << 1)     // A0 = SCL, A1 = GND
    . f- w; G  y5 Z. r2 O; v
24. #define INA219_I2C_ADDRESS_CONF_4               (u8)(0x44 << 1)     // A0 = GND, A1 = VS+
    ; N9 H$ X8 n5 r, k
25. #define INA219_I2C_ADDRESS_CONF_5               (u8)(0x45 << 1)     // A0 = VS+, A1 = VS+
    
26. #define INA219_I2C_ADDRESS_CONF_6               (u8)(0x46 << 1)     // A0 = SDA, A1 = VS+
    
27. #define INA219_I2C_ADDRESS_CONF_7               (u8)(0x47 << 1)     // A0 = SCL, A1 = VS+
    ' V5 H- m/ J) R# F. [% E# e( I
28. #define INA219_I2C_ADDRESS_CONF_8               (u8)(0x48 << 1)     // A0 = GND, A1 = SDA
    / C1 L. s) Y5 [+ f, K
29. #define INA219_I2C_ADDRESS_CONF_9               (u8)(0x49 << 1)     // A0 = VS+, A1 = SDA
    ) d( E5 _6 M3 [& Q  N. ?1 h  q
30. #define INA219_I2C_ADDRESS_CONF_A               (u8)(0x4A << 1)     // A0 = SDA, A1 = SDA
    
31. #define INA219_I2C_ADDRESS_CONF_B               (u8)(0x4B << 1)     // A0 = SCL, A1 = SDA
    8 ]$ m- ^8 v; T' y+ l2 ~7 F
32. #define INA219_I2C_ADDRESS_CONF_C               (u8)(0x4C << 1)     // A0 = GND, A1 = SCL
    ; |2 K4 W# B1 _# @  }! u' Y# i% S* a
33. #define INA219_I2C_ADDRESS_CONF_D               (u8)(0x4D << 1)     // A0 = VS+, A1 = SCL
    $ A; k. W3 _4 b( B3 t& O5 K
34. #define INA219_I2C_ADDRESS_CONF_E               (u8)(0x4E << 1)     // A0 = SDA, A1 = SCL
    
35. #define INA219_I2C_ADDRESS_CONF_F               (u8)(0x4F << 1)     // A0 = SCL, A1 = SCL
    
36. #define INA219_I2C_ADDRESS                      INA219_I2C_ADDRESS_CONF_0
    8 x- \/ D# z8 A0 q3 o& k* C% Y
37. 
    
38. 
    
39. /*----------------------------------------------------------------------------*/
    
40. // Register Addresses
    0 V) n- \& S& {/ j. G; X* \, F% s
41. #define INA219_REG_CONFIG                       (u8)(0x00)      // CONFIG REGISTER (R/W)
    
42. #define INA219_REG_SHUNTVOLTAGE                 (u8)(0x01)      // SHUNT VOLTAGE REGISTER (R)
    & L- X1 [: Z2 r' ~8 [& J
43. #define INA219_REG_BUSVOLTAGE                   (u8)(0x02)      // BUS VOLTAGE REGISTER (R)
    
44. #define INA219_REG_POWER                        (u8)(0x03)      // POWER REGISTER (R)
    0 m* C5 y' m0 L' Y  Y8 r$ ~
45. #define INA219_REG_CURRENT                      (u8)(0x04)      // CURRENT REGISTER (R)
    
46. #define INA219_REG_CALIBRATION                  (u8)(0x05)      // CALIBRATION REGISTER (R/W)
    
47. 
    
48. 
    3 e+ s; x7 V6 H; `9 ]0 O: j. v
49. /*----------------------------------------------------------------------------*/
    5 E# ?  \: O7 n/ W: I3 q; S
50. // Macros for assigning config bits
    / `  ?& G3 ~# z% \" T- y* S! v6 d
51. #define INA219_CFGB_RESET(x)                    (u16)((x & 0x01) << 15)     // Reset Bit
    
52. #define INA219_CFGB_BUSV_RANGE(x)               (u16)((x & 0x01) << 13)     // Bus Voltage Range
    ; T! J6 V/ w  W. G: v7 J
53. #define INA219_CFGB_PGA_RANGE(x)                (u16)((x & 0x03) << 11)     // Shunt Voltage Range
    
54. #define INA219_CFGB_BADC_RES_AVG(x)             (u16)((x & 0x0F) << 7)      // Bus ADC Resolution/Averaging
    6 d+ X$ @2 B1 u: \  H1 j
55. #define INA219_CFGB_SADC_RES_AVG(x)             (u16)((x & 0x0F) << 3)      // Shunt ADC Resolution/Averaging
    . V; x- @* X1 h8 X2 i
56. #define INA219_CFGB_MODE(x)                     (u16) (x & 0x07)            // Operating Mode
    ( e" l+ i; E/ ?4 v2 j  i% f
57. 
    ( O" r: q* _5 ~0 e
58. 
    / a* \1 z- a' R2 d
59. /*----------------------------------------------------------------------------*/
    
60. // Configuration Register
    * ]' I, k, `* q& ]& ]' U
61. #define INA219_CFG_RESET                        INA219_CFGB_RESET(1)            // Reset Bit
    ) q; v/ f  D6 m" o2 S6 ?
62. 
    
63. #define INA219_CFG_BVOLT_RANGE_MASK             INA219_CFGB_BUSV_RANGE(1)       // Bus Voltage Range Mask
    
64. #define INA219_CFG_BVOLT_RANGE_16V              INA219_CFGB_BUSV_RANGE(0)       // 0-16V Range
    
65. #define INA219_CFG_BVOLT_RANGE_32V              INA219_CFGB_BUSV_RANGE(1)       // 0-32V Range (default)
    3 j, y5 I4 p! [  R: d
66. 
    
67. #define INA219_CFG_SVOLT_RANGE_MASK             INA219_CFGB_PGA_RANGE(3)        // Shunt Voltage Range Mask
    
68. #define INA219_CFG_SVOLT_RANGE_40MV             INA219_CFGB_PGA_RANGE(0)        // Gain 1, 40mV Range
    7 a$ a- |+ V) w, {) F& z: C4 t
69. #define INA219_CFG_SVOLT_RANGE_80MV             INA219_CFGB_PGA_RANGE(1)        // Gain 2, 80mV Range
    5 V+ h8 L; h" q/ t+ C5 }* R
70. #define INA219_CFG_SVOLT_RANGE_160MV            INA219_CFGB_PGA_RANGE(2)        // Gain 4, 160mV Range
    2 u9 F* O6 a& m$ }/ t0 W) U
71. #define INA219_CFG_SVOLT_RANGE_320MV            INA219_CFGB_PGA_RANGE(3)        // Gain 8, 320mV Range (default)
    * Y! @+ _7 ]. U4 r
72. 
    1 l) z) W; j: S: t
73. #define INA219_CFG_BADCRES_MASK                 INA219_CFGB_BADC_RES_AVG(15)    // Bus ADC Resolution and Averaging Mask
    
74. #define INA219_CFG_BADCRES_9BIT_1S_84US         INA219_CFGB_BADC_RES_AVG(0)     // 1 x 9-bit Bus sample
    $ X( y/ a) D& I( m& K* |
75. #define INA219_CFG_BADCRES_10BIT_1S_148US       INA219_CFGB_BADC_RES_AVG(1)     // 1 x 10-bit Bus sample
    
76. #define INA219_CFG_BADCRES_11BIT_1S_276US       INA219_CFGB_BADC_RES_AVG(2)     // 1 x 11-bit Bus sample
    
77. #define INA219_CFG_BADCRES_12BIT_1S_532US       INA219_CFGB_BADC_RES_AVG(3)     // 1 x 12-bit Bus sample (default)
    , T  m/ \+ R7 e
78. #define INA219_CFG_BADCRES_12BIT_2S_1MS         INA219_CFGB_BADC_RES_AVG(9)     // 2 x 12-bit Bus samples averaged together
    
79. #define INA219_CFG_BADCRES_12BIT_4S_2MS         INA219_CFGB_BADC_RES_AVG(10)    // 4 x 12-bit Bus samples averaged together
    , k  l5 Y7 w* D2 }' _: Y
80. #define INA219_CFG_BADCRES_12BIT_8S_4MS         INA219_CFGB_BADC_RES_AVG(11)    // 8 x 12-bit Bus samples averaged together
    
81. #define INA219_CFG_BADCRES_12BIT_16S_8MS        INA219_CFGB_BADC_RES_AVG(12)    // 16 x 12-bit Bus samples averaged together
    
82. #define INA219_CFG_BADCRES_12BIT_32S_17MS       INA219_CFGB_BADC_RES_AVG(13)    // 32 x 12-bit Bus samples averaged together
    
83. #define INA219_CFG_BADCRES_12BIT_64S_34MS       INA219_CFGB_BADC_RES_AVG(14)    // 64 x 12-bit Bus samples averaged together
    , @! b/ ~8 I  l: J" P: X
84. #define INA219_CFG_BADCRES_12BIT_128S_68MS      INA219_CFGB_BADC_RES_AVG(15)    // 128 x 12-bit Bus samples averaged together
    - U: Y; `5 Y( E$ k1 b# u' |
85. 
    
86. #define INA219_CFG_SADCRES_MASK                 INA219_CFGB_SADC_RES_AVG(15)    // Shunt ADC Resolution and Averaging Mask
    5 t+ B. r- @5 q: \: S8 `
87. #define INA219_CFG_SADCRES_9BIT_1S_84US         INA219_CFGB_SADC_RES_AVG(0)     // 1 x 9-bit Shunt sample
    ; P( u% N. p3 a
88. #define INA219_CFG_SADCRES_10BIT_1S_148US       INA219_CFGB_SADC_RES_AVG(1)     // 1 x 10-bit Shunt sample
    % {3 l0 z$ S! R6 r: B
89. #define INA219_CFG_SADCRES_11BIT_1S_276US       INA219_CFGB_SADC_RES_AVG(2)     // 1 x 11-bit Shunt sample
    8 [! R* T6 f, i
90. #define INA219_CFG_SADCRES_12BIT_1S_532US       INA219_CFGB_SADC_RES_AVG(3)     // 1 x 12-bit Shunt sample (default)
    
91. #define INA219_CFG_SADCRES_12BIT_2S_1MS         INA219_CFGB_SADC_RES_AVG(9)     // 2 x 12-bit Shunt samples averaged together
    - R& Y4 Q; f& h8 u* b( ?
92. #define INA219_CFG_SADCRES_12BIT_4S_2MS         INA219_CFGB_SADC_RES_AVG(10)    // 4 x 12-bit Shunt samples averaged together
    ; x+ f7 T3 a5 L: X" P
93. #define INA219_CFG_SADCRES_12BIT_8S_4MS         INA219_CFGB_SADC_RES_AVG(11)    // 8 x 12-bit Shunt samples averaged together
    : Q8 \4 m9 _' P5 l3 v) B* F  a$ R
94. #define INA219_CFG_SADCRES_12BIT_16S_8MS        INA219_CFGB_SADC_RES_AVG(12)    // 16 x 12-bit Shunt samples averaged together
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95. #define INA219_CFG_SADCRES_12BIT_32S_17MS       INA219_CFGB_SADC_RES_AVG(13)    // 32 x 12-bit Shunt samples averaged together
    
96. #define INA219_CFG_SADCRES_12BIT_64S_34MS       INA219_CFGB_SADC_RES_AVG(14)    // 64 x 12-bit Shunt samples averaged together
    
97. #define INA219_CFG_SADCRES_12BIT_128S_68MS      INA219_CFGB_SADC_RES_AVG(15)    // 128 x 12-bit Shunt samples averaged together
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98. 
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99. #define INA219_CFG_MODE_MASK                    INA219_CFGB_MODE(7)             // Operating Mode Mask
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100. #define INA219_CFG_MODE_POWERDOWN               INA219_CFGB_MODE(0)             // Power-Down
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101. #define INA219_CFG_MODE_SVOLT_TRIGGERED         INA219_CFGB_MODE(1)             // Shunt Voltage, Triggered
     
102. #define INA219_CFG_MODE_BVOLT_TRIGGERED         INA219_CFGB_MODE(2)             // Bus Voltage, Triggered
     
103. #define INA219_CFG_MODE_SANDBVOLT_TRIGGERED     INA219_CFGB_MODE(3)             // Shunt and Bus, Triggered
     
104. #define INA219_CFG_MODE_ADCOFF                  INA219_CFGB_MODE(4)             // ADC Off (disabled)
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105. #define INA219_CFG_MODE_SVOLT_CONTINUOUS        INA219_CFGB_MODE(5)             // Shunt Voltage, Continuous
     
106. #define INA219_CFG_MODE_BVOLT_CONTINUOUS        INA219_CFGB_MODE(6)             // Bus Voltage, Continuous
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107. #define INA219_CFG_MODE_SANDBVOLT_CONTINUOUS    INA219_CFGB_MODE(7)             // Shunt and Bus, Continuous (default)
     
108. 
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109. 
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110. /*----------------------------------------------------------------------------*/
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111. // Bus Voltage Register
     
112. #define INA219_BVOLT_CNVR                       (u16)(0x0002)       // Conversion Ready
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113. #define INA219_BVOLT_OVF                        (u16)(0x0001)       // Math Overflow Flag
     
114. 
     
115. typedef struct
     
116. {
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117.   signed short voltage_ina219;
     
118.   signed long shunt_ina219;
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119.   signed long current_ina219;
     
120.   signed long power_ina219;
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121. }INA219_DATA;
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122. 
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123. 
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124. extern u8  ina219_busVolt_LSB_mV;
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125. extern u8  ina219_shuntVolt_LSB_uV;
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126. extern unsigned short ina219_calValue;
     
127. 
     
128. extern u32 ina219_current_LSB_uA;
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129. extern u32 ina219_power_LSB_mW;
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130. 
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131. extern void ina219_init(void);
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132. extern void INA_Process(void);
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133. extern signed short ina219_GetBusVoltage_raw(void);
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134. extern signed short ina219_GetCurrent_raw(void);
     
135. extern signed short ina219_GetBusVoltage_mV(void);
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136. extern s32 ina219_GetShuntVoltage_uV(void);
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137. extern s32 ina219_GetCurrent_uA(void);
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138. extern s32 ina219_GetPower_mW(void);
     
139. 
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140. #endif

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驱动写好有一段时间，记不太清了，这里就不对代码进行解释了，以免误导别人。官方驱动的代码中有着很详细的注释，此处依然保留。

不同的采样电阻有不同的设定值，校准寄存器具体的计算方法手册中写的很清楚。

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