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ie8及以上

【经验分享】INA219驱动，基于STM32(STM8移植可用)

[复制链接]
STMCU小助手 发布时间：2022-2-8 21:06
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); A, @* V" A: ?) R) V8 _$ q+ ?
  2. {, y; Z. w$ h2 ^7 r# j7 s2 e7 g9 n
  3.     ina219_init();7 ?+ r, S) b5 h+ j
  4.    
    - C  W  t) `. d  _" r3 v
  5.     while(1)2 r& S' |. d  \' S$ R$ }, |
  6.    {  
    8 N: x1 S, f* _0 L* r; S+ N
  7.         //根据具体需求调用检测电流电压的函数
    ; w$ b* P6 D: I3 E7 n) r& ^
  8.    }  
    9 [( [% ]; X% f) r+ Z
  9. }
复制代码

( w% U3 Y1 Z) L5 T  L: X" {
ina219.c
  1. #include "ina219.h"
    - J9 L7 w( D0 W' ]$ ?

  2. 1 K4 b3 B4 F- a8 o' t
  3. u8  ina219_busVolt_LSB_mV = 4;   // Bus Voltage LSB value = 4mV
    ; S$ f" j5 j  W* \; L
  4. u8  ina219_shuntVolt_LSB_uV = 10;  // Shunt Voltage LSB value = 10uV/ O0 P" Z5 d+ f2 A* b
  5. unsigned short ina219_calValue = 0;) t6 J2 R" Y$ s
  6. ! s! O" S5 [7 S4 c0 L
  7. u32 ina219_current_LSB_uA;1 Y; ?% _2 M+ M5 ?9 w7 o
  8. u32 ina219_power_LSB_mW;
    5 p2 q/ f6 C7 O' i, Z( ~
  9. 7 i3 [! y) B/ Q: r% R; ?0 `
  10. INA219_DATA ina219_data;4 D( a  v8 [+ Z5 ^7 |" Z
  11. 1 p5 I- r! o( y# y* H+ r( X1 H" C
  12. void INA_SCL_OUT(void)9 I4 E" C/ W4 I" X
  13. {2 \! G. ]" m0 d% q7 A6 x. D0 T2 F
  14.     GPIO_InitTypeDef  GPIO_InitStructure;
    1 x$ l' n" E* Z5 M( v3 s( a
  15. - J0 u8 o5 \0 V/ p& K6 U
  16.     RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);8 n: t4 Q( d' {2 f2 n
  17.     7 n( d$ ^) x( E6 q0 Z2 X/ O
  18.     /* Configure I2C1 pins: PB12->SCL->OUT */
    0 J7 f3 I0 O# s- y7 [7 H
  19.     GPIO_InitStructure.GPIO_Pin = INA219_I2C_SCL_PIN;0 ~% z) u+ W2 n- L( J
  20.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;1 Z1 Z% w# [' N' X
  21.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;; d7 U# }6 ^' N/ p. n! l7 ]0 I
  22.     GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);
    8 r" W# |: E% C$ R0 [( V9 Q; L* U
  23.     GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SCL_PIN);
    9 U' f, R) t4 ~
  24. }; b9 o' @' E3 H1 |2 Q5 [1 r, ^

  25. ) l2 W( o' t0 ]7 i# J, }, W/ r
  26. void INA_SDA_OUT(void)( M0 A# k* c: a
  27. {' J+ j$ l; H+ V( T
  28.     GPIO_InitTypeDef  GPIO_InitStructure;
    , a; [' U: A2 ]

  29. ( C! O1 a* f& _( j/ t# ?
  30.     RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);1 I9 |2 i+ F( @  A( p, b6 o
  31.     6 O2 x9 N7 r) c
  32.     /* Configure I2C1 pins: PB14->SDA-OUT */: W4 k  b* c0 \* v5 Y' a' b  G
  33.     GPIO_InitStructure.GPIO_Pin = INA219_I2C_SDA_PIN;0 [- t' _" O5 g& _; Q% }
  34.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;$ ?# q6 x9 h; Q8 j9 b& m8 A; b3 V9 ^
  35.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    * p3 E' t6 r0 f
  36.     GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);
    , I. J- y( ?7 U
  37.     GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SDA_PIN);
    7 a0 [* H+ h2 Z7 }5 ?5 l6 ~, r& W* x
  38. }% Y4 Z- i. |3 J6 ^6 A
  39. ) `1 P  P; v9 Z1 b5 z# @
  40. void INA_SDA_IN(void)6 ^0 S& t6 s( R
  41. {
    # d$ ?' L5 ?& I  P' v, x
  42.     GPIO_InitTypeDef  GPIO_InitStructure;
    5 s$ p% X! b4 v4 N6 B
  43. 5 l$ n" u3 P0 f1 u+ J, a
  44.     RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);
    & }! {5 |8 W! x3 H" l
  45.     9 a% }* X4 t5 M# K3 W; r6 e
  46.     /* Configure I2C1 pins: PB14->SDA-IN */: b  J5 b& a! h# h1 x9 R' L; H( x
  47.     GPIO_InitStructure.GPIO_Pin = INA219_I2C_SDA_PIN;/ w5 B9 Y5 t: X9 W
  48.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    ' l4 ^5 a  o5 \$ h
  49.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;3 J1 K" J1 e! c
  50.     GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);/ f* a5 k) k& L1 }- W9 p, {: n
  51. }3 w7 u+ [* v- ]/ |& L$ ^

  52. ) I; a: @# Y5 U  R: E6 w
  53. void INA_IIC_Start(void)
    , S& K2 j- W7 z) Y% d. E$ j
  54. {
    * h2 A) b- G2 n' q  f2 A/ J
  55.   INA_SDA_OUT();& G( h: U+ q0 U8 M9 n* J
  56.   INA_SCL_OUT();
    # {# z% ?" Q. b% R8 J" C
  57.   
    6 T& Z& J  X: _% M. W! ~
  58.   INA_SDA_SET;
    ; P* R9 G6 s$ n3 ^  O% t
  59.   INA_SCL_SET;
    5 E! f8 s3 _4 v. H& T
  60.   INA_SDA_CLR;4 N" b( j" E: l" s
  61.   INA_SCL_CLR;$ ?' i  ]( s! J% f
  62. }# A4 {$ ?$ R, L: m; h
  63. ! n( z0 m2 a$ u: |. E; H- D
  64. void INA_IIC_Stop(void)& Z8 j: P: {, _; F/ _5 D, y
  65. {
    ( w& ^* \6 u) r% v* D/ z
  66.     INA_SDA_OUT();
    5 j0 ]# f: b( {& [; E& C
  67. 4 F5 Z) |/ t6 y0 W  X
  68.     INA_SDA_CLR;
    . P5 [' g7 Q5 p, [) _
  69.     INA_SCL_SET;
    ( u0 b1 b, p0 k" ?1 g: `/ [
  70.     INA_SDA_SET;
    0 y3 c4 T& w' }( }. r8 W& j
  71. }
    - N) r  u/ v: m% T& A  Q

  72. 5 y3 [4 H2 F/ H! o( ]
  73. void INA_IIC_Set_Ack(unsigned char ack)
    # y8 b5 l8 e6 C+ \6 `- I) d
  74. {0 n# z+ }1 |- d
  75.     INA_SDA_OUT();
    : x  S. o9 D3 Q0 Z8 r
  76.     & b) v4 m' D1 x; U) U
  77.     if(ack)
    + P( k: X" L, C3 V4 X7 a
  78.     {
    . U# l; X" w7 U9 ^& E/ Q% ^  X$ l& u
  79.       INA_SDA_SET;- f/ E  T4 T+ x: J: C, x7 M
  80.     }6 m9 y: Q& ?" ^3 g  k* o
  81.     else& E! j! K' c! F
  82.     {
    $ M& T  W, \, E* o
  83.       INA_SDA_CLR;! ]5 G# z+ p/ k- w: e+ b% O1 l  S
  84.     }3 H; o$ g" a; l8 ]3 ?
  85.    
    ( J& B; B9 g/ J) N3 _$ W! v% o
  86.     INA_SCL_SET;
    / ?+ ^! ]* \$ g8 O7 U/ b( A
  87.     INA_SCL_CLR;, _' P% T: g6 d- U
  88. }
    - t. I, W/ ^0 j* l# B4 h- ~
  89. 8 j. x3 V4 [4 u
  90. unsigned char INA_IIC_Get_Ack(void)
    ) \+ T) N; _( s5 _8 y, L5 U. K' K
  91. {
    7 d/ F2 s1 \" g7 d& _% w# w
  92.     unsigned char ack;4 [- U$ F+ p" z# ?
  93. 5 o3 X6 S/ u% T; \
  94.     INA_SDA_IN();
    % M$ h$ U: ?3 b/ q4 i, [. W# q' `
  95.     INA_SDA_SET;
    ( E5 ^! c% b& b8 f  L
  96.     INA_SCL_SET;- R: U& y/ j+ Q( D" K
  97.     if(INA_SDA_TST)( @: P8 h& e5 Q) O3 X( G, w
  98.     {' d" m) P  S: }  V; l
  99.       ack = 1;
    * R% z1 D& g/ V9 l3 s( x' w
  100.     }- f  p& j8 Z9 z3 `1 x+ U
  101.     else9 |% w. R: I& L/ Z: [5 D% ]2 R# T
  102.     {5 a* r2 V' g) D4 E0 K
  103.       ack = 0;5 z/ v- |- g2 n
  104.     }& ~0 x7 E4 k6 C- i3 W8 O. Q
  105.    
    & c. a" z$ ^! P; w" @
  106.     INA_SCL_CLR;5 c0 f9 d: Z5 f& @" H

  107. 6 O! A4 \( i- f! Z: L* u) a- p! c' _
  108.     return(ack);
    9 N2 ^7 N( M6 N: w8 ?
  109. }
    5 y6 U8 X2 i2 m9 B/ L/ Q' r

  110.   X5 q! R7 Q9 R2 }
  111. void INA_IIC_Write_8bits(unsigned char dat)
    ) `7 q5 u. Q5 L& @
  112. {
    - l9 I3 O- h! W" _* V3 @
  113.   unsigned char i;
    4 c/ y9 X& f0 I/ {* A5 h. l
  114.   9 |# l' i# |! l6 p1 J
  115.   INA_SDA_OUT();/ V% e' }, B- Q5 P/ v& g' W
  116.   for(i = 8; i; i--)
    6 k) c; h8 B1 K2 _! G
  117.   {
      o4 o( R6 S) S0 X$ o3 Q
  118.     if(dat & 0x80)
    6 ?- P# |/ t7 `6 I# S" s3 i
  119.     {4 }$ x! \: q) }. T
  120.       INA_SDA_SET;2 {2 W% g5 G! C! D% U
  121.     }3 l5 w; Y# h$ i  A
  122.     else
    $ ^$ v% e4 [9 l2 w3 a
  123.     {* V- U0 ~' R8 x# c5 I
  124.       INA_SDA_CLR;/ R! B4 I6 T% c& n  ?4 \
  125.     }
    - ]. i: Y) W9 r( e( w+ b
  126.    
    - i' t8 ~5 c' u/ s2 _8 v0 `
  127.     INA_SCL_SET;1 R- N, h; g) ~5 ^2 L3 h
  128.     dat <<= 1;/ G5 c4 A, {4 {( k, }+ |
  129.     INA_SCL_CLR;& g* V& M3 A- Q2 v  G, h/ X9 l* B: D3 A5 E
  130.   }; D+ v- T3 t2 @5 t
  131. }
    % X3 Q  }& X- U+ q

  132. / o  p8 U% c2 c: q9 t: C6 f4 z) Y
  133. unsigned char INA_IIC_Read_8bits(void)- ?" T% `" M, R) K
  134. {
    6 n# w, R! t1 q- A. z, r8 X
  135.     unsigned char i, dat;( v; m! g/ X! H1 W9 N6 {& s: r) x% e

  136. ! f2 e" S. }* Y
  137.     INA_SDA_IN();
    / C0 a8 {% E8 _5 q- j  k5 D2 M
  138.     INA_SDA_SET;
    5 {0 ~6 ~' x$ ^. g/ B
  139.     dat = 0;4 \! D% N4 y6 F0 b
  140.     for(i = 8; i; i--)
    9 K# V, {( \& O! j8 S7 B
  141.     {
    + v+ U+ K1 s; g8 v
  142.         INA_SCL_SET;
    2 S7 e6 X4 C/ o: B% Y/ A% B
  143.         dat <<= 1;. ?( [) ~# s7 w
  144.         if(INA_SDA_TST)
    0 I7 Q1 J( J( S
  145.           dat++;
    2 v' b2 v$ T8 H
  146.         INA_SCL_CLR;
    $ n: B+ p& C# S1 R- p' N
  147.     }" [' v/ T9 i! _+ k3 X" n# c/ g; L
  148.       L# m' G! ?2 A# n
  149.     return(dat);( a% f( f8 K; c6 \7 M7 U
  150. }
    $ P6 r) q$ q: P2 f8 y# N% v! Y

  151. $ ?2 c) T7 v. g6 l
  152. void INA_IIC_Write_Byte(unsigned char reg, unsigned char dat): K' g4 p% a6 e
  153. {
    ' h' z' b& C& }% p+ p9 S
  154.   unsigned char dev = INA219_I2C_ADDRESS;8 G/ _& W: q; c- B& q# W
  155.   
    ( T2 M$ H1 a7 T" u
  156.   INA_IIC_Start();
    # x4 F3 F+ \* A  Y( r/ ~$ F8 S* g! q
  157.   6 F% R  {3 q) m' L: I
  158.   //  dev &= ~0x01;0 r/ a! z; M# D% d& o0 Q
  159.   INA_IIC_Write_8bits(dev);
    ! L9 `0 C6 n4 U  A
  160.   INA_IIC_Get_Ack();
    9 _: F5 U2 [! m( _( e
  161.   
    " p) r  V$ \" E( J; n, |  y
  162.   INA_IIC_Write_8bits(reg);; x. }- ]4 p7 L, m- i
  163.   INA_IIC_Get_Ack();2 M# Z" M) V1 {# k' @- t7 s, c
  164.   - D! g% u: T& e( n3 j8 Y
  165.   INA_IIC_Write_8bits(dat);
    : A4 \& j  a: p9 B
  166.   INA_IIC_Get_Ack();: V0 d9 l6 R8 Z! \$ E
  167.   4 e: F9 H; D7 c
  168.   INA_IIC_Stop();' l( R$ @; \. K, b" A" ~$ N
  169. }
    + ]3 M- F9 P' k, G) a" Y9 {2 o. S
  170. * C. Z! X; x- B2 R; @
  171. unsigned char INA_IIC_Read_Byte(unsigned char reg)
    3 m; p) h6 Z) w; I
  172. {" l# X* ]4 J  q8 j( y# i& f
  173.   unsigned char dat;
    ' k! Q/ N  k; ~* K3 x8 P& e0 r% s
  174.   unsigned char dev = INA219_I2C_ADDRESS;( N2 @, n" d- P. `* z
  175.   7 W1 B. f0 f# o1 P& G4 A$ l( m& l& D5 z
  176.   INA_IIC_Start();9 h- q0 E- Y7 a! Y% D
  177.   
    : N3 R9 f0 @# G/ G( _
  178.   //  dev &= ~0x01;
    6 F9 i; [8 u/ S" u3 H
  179.   INA_IIC_Write_8bits(dev);# T4 h& H! ]2 C. D) w
  180.   INA_IIC_Get_Ack();. G4 y$ ?  z( i  E+ E
  181.   
    1 g. @$ U% L( A; C( d- t/ [1 o3 R' n
  182.   INA_IIC_Write_8bits(reg);
    " f% Q3 c: B6 [* J  l2 `
  183.   INA_IIC_Get_Ack();
    : L& V/ |3 Z9 m; O8 j/ o6 C
  184.   
    : r/ G0 U$ A. C2 S# t5 p1 n7 i0 e
  185.   INA_IIC_Start();# K0 G, w- O4 S+ _8 e7 H# D
  186.   9 {$ h: O+ d8 t& ^5 X
  187.   dev |= 0x01;
    $ c! s/ `! Z! {: [- ~
  188.   INA_IIC_Write_8bits(dev);
    9 o4 P4 n+ u" t, G" J* L
  189.   INA_IIC_Get_Ack();. D/ j2 k( o, n5 m. ]9 _$ c! v: K" {
  190.   % B7 j# {& G) ]4 `
  191.   dat = INA_IIC_Read_8bits();$ h/ x2 x% W9 J& y
  192.   INA_IIC_Set_Ack(1);
    9 Q7 T6 k& `' ?. B; {' S
  193.   ! }+ l( t; l1 l  b1 a6 Z( R  x
  194.   INA_IIC_Stop();
    , j3 A% B; [& k9 c& s  Q+ e
  195.   9 h9 V: G2 X4 d' {* C" c8 V# G
  196.   return (dat);
    - l5 [& ]( O' d  u4 ~& \) M
  197. }4 o/ W8 I( M  w6 r6 e7 @( {4 O! q2 F
  198. * ^- P; b2 \3 P* `, t. H4 W; C+ J
  199. void INA_IIC_Write_Bytes(unsigned char reg, unsigned char *dat, unsigned char num)
    + Y  I& p0 g) t3 _
  200. {, w' {4 S$ |: ~" v/ x2 m
  201.   unsigned char dev = INA219_I2C_ADDRESS;
    1 O. w  N/ [  h! d; W
  202.   , i9 _, B7 U8 a* Z# U0 K% O
  203.   INA_IIC_Start();
    & O" K- i! ^/ g3 u
  204.   
    9 n  y3 q7 ?2 d( ]: T
  205.   //  dev &= ~0x01;
    # }+ S; ?3 x: E5 ]
  206.   INA_IIC_Write_8bits(dev);
    ' v' h5 L4 \" H% V$ F! `  j) H
  207.   INA_IIC_Get_Ack();
    1 w+ J3 O0 C8 N# V! e' W
  208.     p0 x! N; g4 x+ X' H
  209.   INA_IIC_Write_8bits(reg);  J) O& D1 o9 W; W
  210.   INA_IIC_Get_Ack();9 Z0 ^& W# X3 t5 ^8 c' J
  211.   8 H! r$ t  t: r3 ^: k" p
  212.   while(num--)
    . n1 [" _$ m; g3 t8 H6 O
  213.   {/ O) d3 W" I  l. e( r
  214.     INA_IIC_Write_8bits(*dat);
    , n+ _$ w1 h. s' A4 H  F$ x: x4 Z
  215.     INA_IIC_Get_Ack();
    / }0 N" d3 v: @: h2 f9 V+ C! ~
  216.     dat++;
    ) G+ Y6 }& s' G. k0 n0 `
  217.   }
    1 r( V! q% t9 F! l6 h
  218.   : D, z! r- m/ `. N8 Q) C  @
  219.   INA_IIC_Stop();
    5 l. h; ]# B% f- c/ _: f3 C& p
  220. }
    5 j6 U5 J" b( `7 [! k5 q% F4 V

  221. 1 x7 j2 [5 ]. o
  222. void INA_IIC_Read_Bytes(unsigned char reg, unsigned char *dat, unsigned char num)
      t7 u$ X* A  T; S! @3 `' H  p
  223. {
    , _9 _7 q0 V3 B6 f2 O
  224.   unsigned char *tmp = dat;& {/ u# b  F. a2 P5 S* W1 ?. X
  225.   unsigned char dev = INA219_I2C_ADDRESS;8 X! x$ c8 w8 s" F/ z; @7 l
  226.   # p% }9 h# E' l: L3 A! A) U
  227.   INA_IIC_Start();& D3 n, }9 }1 |3 y" c9 S
  228.   
    ' i. U) b# G1 `' {$ v' M5 @
  229.   //  dev &= ~0x01;# g- M- t8 ]( e9 Y2 B# y! W" @
  230.   INA_IIC_Write_8bits(dev);
    & o9 Q# u% G+ N4 L0 D& E
  231.   INA_IIC_Get_Ack();% g) O7 n$ ?8 c7 f$ P- f# R
  232.   / L# e, x8 q# L/ w6 u) Z
  233.   INA_IIC_Write_8bits(reg);+ U5 N6 F# k. l8 p7 Z" v: c
  234.   INA_IIC_Get_Ack();- J" m4 y+ z1 I5 V$ N9 Z+ z- R: f! v
  235.   
    0 q# i. V2 L' ?' j; J5 U0 ]
  236.   INA_IIC_Start();9 ~$ \1 [, n( G5 `0 w2 e
  237.   
    ) {+ r0 F( V: N0 k
  238.   dev |= 0x01;( I3 I+ D% `# W8 j7 z6 f) \
  239.   INA_IIC_Write_8bits(dev);
    6 K7 ~% l6 w0 e. R8 X
  240.   INA_IIC_Get_Ack();" i  Y# u5 b/ @! u% G; q$ m" P0 N
  241.   
    ! u. C. T; j* m! G
  242.   while(num--)! @, C# r% z; }* E
  243.   {
    7 {( n/ d4 ~. p& V0 k3 Z& h9 J- ]
  244.     *tmp = INA_IIC_Read_8bits();
    ; J& }8 w7 l$ H
  245.     if(num == 0)
    # D' K  P4 t! }% `5 F' n! {" ~4 X
  246.       INA_IIC_Set_Ack(1);
    . ?5 M! y8 F; G, a$ C
  247.     else' p. ]/ ^% |: N6 t8 o7 C! @
  248.       INA_IIC_Set_Ack(0);  t* @! H" t+ \4 B
  249.     tmp++;5 N) M# X' r( o9 d6 \: a% x8 R
  250.   }
    7 ~7 V0 |) i( M* [# w
  251.   
    # y) ?. p7 U& f2 U
  252.   INA_IIC_Stop();# h/ z, ^! P3 K. O2 a' [( K
  253. }8 X4 Q( [( J- P: _& e6 I; {! T

  254. $ m# H: k: y" _" g, k
  255. void ina219_Write_Register(unsigned char reg, unsigned int dat)5 T/ p8 L" t/ Q5 G* K  f6 k( b# F  A
  256. {
    4 a4 q9 K% c' ?: b: G
  257.     unsigned char val[2];
    8 r) z6 O# p+ _6 D
  258.    
    , @  I( a) R; D8 T
  259.     val[0] = (unsigned char)(dat >> 8);# J: }, v& k( e4 ]
  260.     val[1] = (unsigned char)(dat & 0xFF);" N; Q2 V9 E' P5 W
  261.     INA_IIC_Write_Bytes(reg, val, 2);
      T: [5 g& C2 L6 [3 z
  262. }
    6 F9 F* o+ c$ {9 y- c

  263. 2 M1 L% b8 R9 C8 o! x" i: q
  264. void ina219_Read_Register(unsigned char reg, signed short *dat)
    1 ^# y7 T0 n- r. J; i8 u  o
  265. {
    ; y) m- Y  ^; r& ]5 C+ Y, |# o3 d9 N& y
  266.     //printf("read reg == %d\r\n",reg);1 m# X3 w0 J/ d; \( n( |3 Q& c
  267.   unsigned char val[2];( s7 c" R7 u2 ~' b( U2 g
  268.   0 ^; g- I( h- _) ]% V
  269.   INA_IIC_Read_Bytes(reg, val, 2);) n0 N' N2 G# a' b& Q: p
  270.   *dat = ((unsigned int)(val[0]) << 8) + val[1];8 v9 Q9 g3 a! p  E& f! w
  271.   
    5 x3 v8 `/ {8 D2 Y% h
  272.     //printf("data1 == %x\r\n",val[0]);, i1 ~4 J) p- ~/ w; v1 B' r5 u
  273.     //printf("data2 == %x\r\n",val[1]);' n& T: Y% [, x
  274.    
    $ z5 Z6 }, ]3 U
  275. }
    . k2 S( T+ b) c' V. l# s; H1 @

  276. 4 n1 P. U5 a! ]0 u  G4 `
  277. // INA219 Set Calibration 16V/16A(Max) 0.02¦¸# f2 ^: Z7 K& w! P- J0 D
  278. void ina219_SetCalibration_16V_16A(void)' e) N1 n1 h* z8 L+ h' S$ J) i
  279. {
    , M; ~! V5 v4 j! h- [; ~: u
  280.   u16 configValue;6 }2 B5 V, T$ r: H  T
  281.   
    ! A) J9 t. \% j9 E. i
  282.   // By default we use a pretty huge range for the input voltage,# Y8 a: S: @2 p
  283.   // which probably isn't the most appropriate choice for system. \. y/ R6 N( f6 H* [! T
  284.   // that don't use a lot of power.  But all of the calculations
    9 r2 F& ]. G3 S9 ~
  285.   // are shown below if you want to change the settings.  You will' }* C- B5 F3 [5 R( A
  286.   // also need to change any relevant register settings, such as
    + v) n2 ]6 H, e1 w' E. T/ E9 N
  287.   // setting the VBUS_MAX to 16V instead of 32V, etc.
    9 H# u0 D  ^& v! ^* B
  288.   ) a# d( [# C6 f6 N- }
  289.   // VBUS_MAX     = 16V   (Assumes 16V, can also be set to 32V)
      r9 K$ f; o1 {- ?# h
  290.   // VSHUNT_MAX   = 0.32  (Assumes Gain 8, 320mV, can also be 0.16, 0.08, 0.04)
    : I* a$ u3 i. `8 x' e
  291.   // RSHUNT       = 0.02   (Resistor value in ohms)# {! p& B4 m0 f* w
  292.   3 P" L4 g9 [9 G% n( i
  293.   // 1. Determine max possible current% Q9 q1 S! T) j+ B$ I4 F; q* o! k" K
  294.   // MaxPossible_I = VSHUNT_MAX / RSHUNT
    " m3 Y" |8 F4 y5 O  A
  295.   // MaxPossible_I = 16A
    . C" p9 \5 @: l8 G
  296.   6 L5 k+ p3 W+ d: v; j# }+ ^
  297.   // 2. Determine max expected current
    7 \5 @4 S) o( s) V5 B- C, G& n
  298.   // MaxExpected_I = 16A
    , E3 a) U( F4 X+ u+ a/ a4 S; e
  299.   
    . C# A9 v4 Y; ?9 y2 V
  300.   // 3. Calculate possible range of LSBs (Min = 15-bit, Max = 12-bit)
    3 z4 A: X5 s6 @( V* L1 i2 g
  301.   // MinimumLSB = MaxExpected_I/32767
    / g' R* l: E# Y+ p5 F1 @; D; J
  302.   // MinimumLSB = 0.00048            (0.48mA per bit)
    4 C$ \+ m* E8 y: u$ f
  303.   // MaximumLSB = MaxExpected_I/4096
    $ _& i0 u$ S7 }/ m+ ^
  304.   // MaximumLSB = 0,00390            (3.9mA per bit)9 G7 V( D: E1 u+ P5 C5 T
  305.   . r6 _( e- K" I
  306.   // 4. Choose an LSB between the min and max values
    " a  N: Y2 L/ l: ?7 B; D
  307.   //    (Preferrably a roundish number close to MinLSB)
    % g: C% k& m4 f; g7 L
  308.   // CurrentLSB = 0.00050            (500uA per bit). k3 J9 ?! L0 R9 n2 P* m
  309.   
    8 t6 d4 O6 y4 B! i- L6 ^2 A
  310.   // 5. Compute the calibration register
    ! ]2 d% X& b+ V% G1 S
  311.   // Cal = trunc (0.04096 / (Current_LSB * RSHUNT))
    - H& c# F& L. [; G" x
  312.   // Cal = 4096 (0x1000)8 k, C* R' x2 L
  313.   
    " _- U. _. S7 \8 J# p% ?
  314.   ina219_calValue = 0x1000;
    , F& V( j% `2 a& W4 V
  315.   
    2 H: X3 @9 r& `) V7 H; J. e
  316.   // 6. Calculate the power LSB
    / I% j6 l0 X! ]
  317.   // PowerLSB = 20 * CurrentLSB
    1 S" e( W9 u2 j0 |+ B" r" M
  318.   // PowerLSB = 0.01 (10mW per bit)
    1 ~; d/ A, _4 ^6 o* Z
  319.   ! M( b1 L) S$ P6 Q6 _
  320.   // 7. Compute the maximum current and shunt voltage values before overflow8 K+ s/ c* A9 a, [5 W, {0 T: n* X# T
  321.   //  P$ p' \& x+ l# E9 F' v
  322.   // Max_Current = Current_LSB * 32767" ]" D! p; `: j( P
  323.   // Max_Current = 16.3835A before overflow" R2 P; D  K' W. y7 m
  324.   //
    # |2 `/ l4 t2 M% T( N5 A' ?) t) F- R
  325.   // If Max_Current > Max_Possible_I then
    & K* n% k$ R: J) |# K3 H5 w
  326.   //    Max_Current_Before_Overflow = MaxPossible_I
    5 H+ T9 \9 D) B0 Z+ x- X9 B/ m) a
  327.   // Else
    # M+ X* |% p4 Y" x0 j
  328.   //    Max_Current_Before_Overflow = Max_Current; l6 Z% t+ ~* c  ?# g2 W# Z
  329.   // End If
    0 S. w- c9 m( q# Y, y  g
  330.   //: A) Z4 J. T! p% M
  331.   // Max_ShuntVoltage = Max_Current_Before_Overflow * RSHUNT' P8 v3 e' {1 E' _% Z, b
  332.   // Max_ShuntVoltage = 0.32V- P$ K3 g5 m6 @9 w# Y' U/ ?# l
  333.   //# R/ W; n: X2 S% M& S9 e
  334.   // If Max_ShuntVoltage >= VSHUNT_MAX0 X2 d/ I$ i& n$ b0 w6 N5 }
  335.   //    Max_ShuntVoltage_Before_Overflow = VSHUNT_MAX% N* B8 X6 }& L3 E- V
  336.   // Else
    ) h2 W8 q! H/ P% D2 J
  337.   //    Max_ShuntVoltage_Before_Overflow = Max_ShuntVoltage4 T+ u+ ?4 v. T. [! ?2 l; R
  338.   // End If. k: t/ c: G0 h* L5 ]' v" T
  339.   5 b( F4 U, u! }3 z
  340.   // 8. Compute the Maximum Power
    9 Z" y- V( b. F, f  B: H( a9 H; z
  341.   // MaximumPower = Max_Current_Before_Overflow * VBUS_MAX
    " y  x3 S' ?( l9 K+ T
  342.   // MaximumPower = 1.6 * 16V
    " i$ S: \1 I1 I1 f
  343.   // MaximumPower = 256W, H7 d' A, `8 g; B$ Y5 U
  344.     g$ `9 L, N9 [7 u% T4 m
  345.   // Set multipliers to convert raw current/power values: w% ~, M! e5 i# u7 s
  346.   ina219_current_LSB_uA = 500;     // Current LSB = 500uA per bit( h/ D8 }  x3 w) Q2 K6 h# Q4 |& _
  347.   ina219_power_LSB_mW = 10;        // Power LSB = 10mW per bit = 20 * Current LSB
    ; u" R2 g  k9 O/ y: Y
  348.   " I$ E9 x$ n! j+ U1 p: V
  349.   // Set Calibration register to 'Cal' calculated above
    * Z' S9 ^* r, c5 l* G) `7 ^* X& j
  350.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
    1 S+ ]0 u/ o& z5 L1 g, }
  351.   
      V8 L: K" @  Y% Q* P% H' q
  352.   // Set Config register to take into account the settings above& w  A2 k2 ~3 e7 t
  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 );8 _$ B) p( v/ `
  354.   
    6 {* E8 R" K; H
  355.   ina219_Write_Register(INA219_REG_CONFIG, configValue);$ l! L& o! P; e2 G& |  ^  U
  356. }
    * e6 ?& R+ F3 u4 w

  357. 8 e- ?2 T' i- S) g2 `
  358. void ina219_configureRegisters(void). t( `) ]. X; L) a0 S6 W. [
  359. {
    ( B/ R4 Y# M+ w+ ?1 N
  360.   DelayMs(15);
    ' L8 s& W, t+ `0 R2 S1 U
  361.   , q1 }& E( ?  \' |% ]$ U
  362.   ina219_SetCalibration_16V_16A();/ p' Q4 Z6 s% ^; ~7 t
  363. }$ r. K+ x2 F7 h' W/ o* O3 h

  364. 9 Z, S2 N9 ^5 q; Z; J
  365. void ina219_gpio_init(void)
    4 v& _, k) e; }, M
  366. {
    $ n! }$ W; f7 v4 h3 P
  367.     INA_SCL_OUT();
    # f/ r, i7 W, U
  368.     INA_SDA_OUT();
    1 Y- P; \% s! p! o* A1 U
  369. }! D' Z0 r7 p- o9 I

  370. ) B' }5 |7 y/ v
  371. void ina219_init(void)# S4 r5 y9 ]' U, B4 W
  372. {
    + [2 p% |/ I4 t' M. m* l- `; X, L1 ?- F
  373.   ina219_gpio_init();
    3 R3 e& ?4 m; u, w- m3 ]6 v; c6 [
  374.     X! ]/ C2 T3 S- p! W
  375.   ina219_configureRegisters();# o- H* U6 a, G5 V
  376. }
    % }9 F7 ]2 b) @8 F( {  F  i; w& Z8 ]
  377. . k3 e8 b! r7 O5 A. m* ]  @
  378. 2 S3 u9 o5 h1 ~! z- D( L& w' R2 s
  379. /* ÕâÀïÒÔÉÏÊdzõʼ»¯º¯Êý */
    + q) x1 Q. X% W% t8 d, [) Y
  380. /* ´ÓÕâÀïÍùÏÂÊǹ¦Äܺ¯Êý */
    * Y$ J. g1 e  y1 q
  381. ( U$ e# N8 m: b5 B1 X- b3 D

  382. 8 x, l( B( t+ M3 Q/ |
  383. signed short ina219_GetBusVoltage_raw(void)9 E4 s1 h7 j3 M! w% H
  384. {" F6 |4 W9 \/ u9 |+ |
  385.   signed short val;
    9 @! Q1 V8 `. W- n3 m; X; i7 H
  386.   5 y+ h' b  g: q
  387.   ina219_Read_Register(INA219_REG_BUSVOLTAGE, &val);
    2 I% f" g4 [" ^6 H1 L: b8 p9 q
  388.   val >>= 3;                      // Shift to the right 3 to drop CNVR and OVF
    1 ]7 p! g* z" ^9 r9 {4 ]5 C/ E
  389.   ! z' J% Y) P( `3 U' [1 q# {
  390.   return (val);0 P; S& f% J& l
  391. }1 _2 ~% j- J8 a  I
  392. 4 G6 [# _( T8 q8 d) T
  393. signed short ina219_GetCurrent_raw(void)
    # D6 \) t- l% ?7 [" T$ e
  394. {
    ( u# E; s$ x" [' _+ A: b* W
  395.   signed short val;
    : d9 s0 u: [- T2 Z& R; S9 _; Q
  396.   
    + G$ z# O4 k' u  e  O* v  ]/ H
  397.   // Sometimes a sharp load will reset the INA219, which will& r8 u6 }+ ^; G1 l3 M
  398.   // reset the cal register, meaning CURRENT and POWER will
    6 {3 ?3 S% e: \: t
  399.   // not be available ... avoid this by always setting a cal
    & {9 r0 d2 h, {8 e6 M5 I4 D6 @7 @
  400.   // value even if it's an unfortunate extra step
    3 _! F. |+ ?% Q
  401.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);+ R. H# ?9 g" g4 W7 f. }
  402.   
    / p0 [" X& I  \
  403.   // Now we can safely read the CURRENT register!
    ) H, ^$ ^2 H4 D! K
  404.   ina219_Read_Register(INA219_REG_CURRENT, &val);4 d$ A: x. b! D" M3 v) w/ B. A
  405.   
    7 m6 j8 B3 ~8 G
  406.   return (val);: A% b  j% z. d- I# g; S  y
  407. }$ ]* g0 s" n" U6 t+ D. a

  408. ! K, D% z# r: M2 J. [& p* _

  409. , X( T8 j( L5 D; r2 b$ C/ A
  410. signed short ina219_GetBusVoltage_mV(void)
    % c) |1 t  k. K* y3 }4 B( s( |
  411. {
    4 T2 |; Z, m8 M! ^: u+ |
  412.   signed short val;
    # ?6 @: E0 `% G8 G
  413.   ; {( \+ M- @- I# R) Z
  414.   ina219_Read_Register(INA219_REG_BUSVOLTAGE, &val);7 \# u0 A) z+ Q( }
  415.   val >>= 3;                      // Shift to the right 3 to drop CNVR and OVF
    1 t" N. i2 @4 k# N
  416.   val *= ina219_busVolt_LSB_mV;   // multiply by LSB(4mV)* L) Q+ @- I" @( v0 i* j
  417.   " h5 k( a" U1 A' b4 [) x
  418.   return (val);1 Q* c0 w7 F/ r8 h- |
  419. }4 k& N5 V1 p# m: a( I
  420. 1 K/ E5 t" Q6 P0 h3 F6 }
  421. s32 ina219_GetShuntVoltage_uV(void)
    1 r# G5 ?: V# d6 _! o' w$ s
  422. {9 s- G) _, Z* F3 p" t6 m
  423.   s32 val;
    3 R) f5 _( b5 G1 h: p0 K$ Y8 e/ J
  424.   s16 reg;
    * e' T  H% \9 b2 u+ `
  425.   
    ; j+ f# A- h5 X
  426.   ina219_Read_Register(INA219_REG_SHUNTVOLTAGE, ®);
    ; z1 M, S! l* f0 N; Q- z. ?* q, s. X$ E' [
  427.   val = (s32)reg * ina219_shuntVolt_LSB_uV;   // multiply by LSB(10uV)
    5 B) U. c/ v$ s) ]' Z" C% l4 n
  428.   2 a" F4 [6 Z9 u. I$ O
  429.   return (val);
    1 O7 b: F( F& i% \/ b+ Z  G% V
  430. }' J2 r( v  g9 d/ P( d) A0 O
  431. " ^% H1 J9 @7 R  Z# p
  432. s32 ina219_GetCurrent_uA(void)
    $ l* r- H5 h6 G2 j( d* k
  433. {
    ) y, S5 W$ n; R7 r' ]
  434.   s32 val;
    . \+ `* A- F1 e5 [5 _
  435.   s16 reg;9 q- G& s1 [: p
  436.   ; g6 ]: s  ]6 C0 C2 o7 G& Z
  437.   // Sometimes a sharp load will reset the INA219, which will
    0 _1 c1 v* e1 r1 ^. @5 E) A
  438.   // reset the cal register, meaning CURRENT and POWER will
    : T8 W5 l" i, l& v4 P
  439.   // not be available ... avoid this by always setting a cal: r8 ^! x- T  i1 k; Q9 b) ?, A" o
  440.   // value even if it's an unfortunate extra step
    3 u5 K6 O9 Q0 v: y  J
  441.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
    # [+ l7 V. w2 C/ I
  442.   
    ! Z, P% c, f% V. |% a/ {' T4 l
  443.   // Now we can safely read the CURRENT register!7 Z. I& c9 N- [& f* N( {& Q: G9 Y
  444.   ina219_Read_Register(INA219_REG_CURRENT, ®);
    : Z5 D) R+ P" ^( a. x
  445.   
    ' V# |( W5 L) Q& ^' }. |6 K4 Y' ?
  446.   val = (s32)reg * ina219_current_LSB_uA;
    8 x+ ~% O1 ?2 N8 F/ W6 y' x- a# T
  447.     t$ ?6 x' X: W9 G
  448.   return (val);" [1 ?) m1 G+ d  l& C  E7 U3 t
  449. }1 E! k& t4 R* m

  450. 9 B6 g2 _) |1 U( E0 {0 c3 O
  451. s32 ina219_GetPower_mW(void)
    : `; J( N1 b0 A3 e
  452. {* K. n# `# ]( P) g% A+ N
  453.   s32 val;
    / [- R; _; d% F/ T
  454.   s16 reg;
    3 g! T6 o, U/ M* k/ H
  455.   
    2 d: i+ ~8 l; D
  456.   // Sometimes a sharp load will reset the INA219, which will9 ~8 G8 g6 J1 f: h2 p  D: W8 q; H
  457.   // reset the cal register, meaning CURRENT and POWER will( i# L6 f0 z+ y4 o/ C' c
  458.   // not be available ... avoid this by always setting a cal+ b1 Q* S  f" X2 P" @- `
  459.   // value even if it's an unfortunate extra step7 H& `' k, x7 O4 b% M; X4 u
  460.   ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
    ( _. _) E! Z8 F( u& w/ v
  461.   1 u# O# V1 N& r( |4 d1 ]
  462.   // Now we can safely read the POWER register!
    6 }& ~1 M! W+ s. |3 F2 i7 `
  463.   ina219_Read_Register(INA219_REG_POWER, ®);2 L  Z3 E$ y- X+ t% h
  464.   
    4 m; h( o- w1 M
  465.   val = (s32)reg * ina219_power_LSB_mW;+ v7 D- E/ G2 Q7 T
  466.   
    5 p3 T$ c) ]# s1 C" p: v
  467.   return (val);
    ) R" l$ M5 c1 e3 ^
  468. }
    & a7 b$ J6 J: P: Z0 T# ?& V

  469. 2 l; |* z' b" |+ M# k+ n: i. r
  470. void INA_Process(void)
    . A% ^+ e% ~( z9 H
  471. {
    # T+ @& a* h' E- W# J
  472.     if(INA219process_flag == Open)/ W, V( \  G4 H4 l/ C  t
  473.     {4 F* M1 \1 v( C. e
  474.         INA219process_flag = Close;6 \. J* u4 u. s! v
  475.         . G$ ^! F6 K& k" l. e/ K
  476.         ina219_data.voltage_ina219 = ina219_GetBusVoltage_mV();6 z, R/ W! [4 W' K9 s" `7 _
  477.         printf("voltage_ina219 is %d\r\n",ina219_data.voltage_ina219);
    6 g. i6 R6 M, j* C7 _- F
  478.         7 }4 U5 G7 t! a5 `8 [
  479.         ina219_data.shunt_ina219 = ina219_GetShuntVoltage_uV();
    / |! R; C/ W9 x) ~
  480.         printf("shunt_ina219 is %ld\r\n",ina219_data.shunt_ina219);
    , D  t5 c! j1 I( q" Y. ?; }
  481.         6 a( g, Q1 v0 _2 Z
  482.             & m) J7 k4 I7 Y) M
  483.         ina219_data.current_ina219 = ina219_GetCurrent_uA();
    # R  s/ J+ O1 s, Q, b
  484.         printf("current_ina219 is %ld\r\n",ina219_data.current_ina219);# ~0 Y: C9 o9 H3 ~
  485.         
    * I" d, [3 H5 R% ^9 D& G
  486.         ina219_data.power_ina219 = ina219_GetPower_mW();* \. D& e5 z0 j+ P
  487.         printf("power_ina219 is %ld\r\n",ina219_data.power_ina219);6 [4 K: @' Q% A$ a
  488.     }
    9 z! e# e- q9 }- D
  489. }
复制代码
2 f; }1 p& z# v, p, u0 i% T
ina219.h
  1. #ifndef __INA219_H7 J( D2 R+ T% Y  u4 I
  2. #define __INA219_H
    : Z: k8 d, t& b% t) \9 }1 A
  3. #include "main.h"% `% {5 D9 G- a7 @, {

  4. 4 c6 p2 X$ O9 i
  5. #define INA219_I2C_PORT                        GPIOB6 E" W  z( e' s# }7 F
  6. #define INA219_I2C_GPIO_CLOCK            RCC_APB2Periph_GPIOB
    # {" z' ?) ~; v8 g
  7. #define INA219_I2C_SCL_PIN                GPIO_Pin_12; f1 \7 `3 f4 a4 x( G) `
  8. #define INA219_I2C_SDA_PIN                GPIO_Pin_14. x5 ^: z+ @2 ^

  9. , q) Y7 P0 C* k4 v* N
  10. #define INA_SCL_SET     GPIO_SetBits(INA219_I2C_PORT,INA219_I2C_SCL_PIN)- A3 F! p3 c: z
  11. #define INA_SDA_SET     GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SDA_PIN)' m9 \4 v: X" n
  12. % L+ ?! r7 H' k* o( Y7 A' `, {4 o
  13. #define INA_SCL_CLR     GPIO_ResetBits(INA219_I2C_PORT,INA219_I2C_SCL_PIN)
    9 n. U9 z7 b) c9 X2 U2 a
  14. #define INA_SDA_CLR     GPIO_ResetBits(INA219_I2C_PORT,INA219_I2C_SDA_PIN)  ?2 v% n3 w( ^4 p! r$ a5 l( R
  15.   I( h9 ~3 T- B" n9 ^  D+ D
  16. #define INA_SDA_TST     GPIO_ReadInputDataBit(INA219_I2C_PORT,INA219_I2C_SDA_PIN)1 ^9 A, N$ s: y% i" b

  17.   _4 p5 u" K( a0 X. J
  18. /*----------------------------------------------------------------------------*/6 {9 H; y$ P9 s' {
  19. // I2C Address Options! H3 ^0 Z' l) y, A; e6 w
  20. #define INA219_I2C_ADDRESS_CONF_0               (u8)(0x40 << 1)     // A0 = GND, A1 = GND- X# e% O6 G- |, u* z2 y
  21. #define INA219_I2C_ADDRESS_CONF_1               (u8)(0x41 << 1)     // A0 = VS+, A1 = GND8 h1 W# R, P$ R
  22. #define INA219_I2C_ADDRESS_CONF_2               (u8)(0x42 << 1)     // A0 = SDA, A1 = GND
    " _* D: Q& B7 t/ c
  23. #define INA219_I2C_ADDRESS_CONF_3               (u8)(0x43 << 1)     // A0 = SCL, A1 = GND
    , v; B6 S& ?( R5 W2 N
  24. #define INA219_I2C_ADDRESS_CONF_4               (u8)(0x44 << 1)     // A0 = GND, A1 = VS+
    + R! J: l# V+ B: g+ \/ N
  25. #define INA219_I2C_ADDRESS_CONF_5               (u8)(0x45 << 1)     // A0 = VS+, A1 = VS+0 ^3 W# f9 q) w
  26. #define INA219_I2C_ADDRESS_CONF_6               (u8)(0x46 << 1)     // A0 = SDA, A1 = VS+
    4 c$ ?8 E0 v- w; j
  27. #define INA219_I2C_ADDRESS_CONF_7               (u8)(0x47 << 1)     // A0 = SCL, A1 = VS+
    * p& k, I/ @6 e; K3 l; p* m
  28. #define INA219_I2C_ADDRESS_CONF_8               (u8)(0x48 << 1)     // A0 = GND, A1 = SDA& R8 s! \8 t+ q+ E! e( \+ p
  29. #define INA219_I2C_ADDRESS_CONF_9               (u8)(0x49 << 1)     // A0 = VS+, A1 = SDA
    / [' w8 c) O. `( i3 L" ^
  30. #define INA219_I2C_ADDRESS_CONF_A               (u8)(0x4A << 1)     // A0 = SDA, A1 = SDA
    1 v) J  M+ B) g
  31. #define INA219_I2C_ADDRESS_CONF_B               (u8)(0x4B << 1)     // A0 = SCL, A1 = SDA
    & F( I5 b1 c9 |- w% r& _
  32. #define INA219_I2C_ADDRESS_CONF_C               (u8)(0x4C << 1)     // A0 = GND, A1 = SCL
      }8 p* K3 i- [' c2 u
  33. #define INA219_I2C_ADDRESS_CONF_D               (u8)(0x4D << 1)     // A0 = VS+, A1 = SCL# P+ K8 Z4 C$ D$ L2 m! p  p* ~
  34. #define INA219_I2C_ADDRESS_CONF_E               (u8)(0x4E << 1)     // A0 = SDA, A1 = SCL
    . @$ L* B3 F6 G
  35. #define INA219_I2C_ADDRESS_CONF_F               (u8)(0x4F << 1)     // A0 = SCL, A1 = SCL# p% w. g) t0 Q* B% k' Q
  36. #define INA219_I2C_ADDRESS                      INA219_I2C_ADDRESS_CONF_0
    : z8 ]1 [; `3 `+ F1 L0 E/ i3 ^

  37. 2 k1 J% v0 y- g

  38. $ \* ^4 z4 I6 S6 q
  39. /*----------------------------------------------------------------------------*/
    8 o1 @+ l# m3 t2 B! R/ u
  40. // Register Addresses
    + \2 f' d0 z: O% s
  41. #define INA219_REG_CONFIG                       (u8)(0x00)      // CONFIG REGISTER (R/W)! ]1 B4 |/ R/ P. B* X
  42. #define INA219_REG_SHUNTVOLTAGE                 (u8)(0x01)      // SHUNT VOLTAGE REGISTER (R)7 B6 h9 I1 b( t8 J
  43. #define INA219_REG_BUSVOLTAGE                   (u8)(0x02)      // BUS VOLTAGE REGISTER (R)
    , S4 Q$ z8 b7 ?
  44. #define INA219_REG_POWER                        (u8)(0x03)      // POWER REGISTER (R)
    . D3 P/ a: [$ p) h
  45. #define INA219_REG_CURRENT                      (u8)(0x04)      // CURRENT REGISTER (R)
    2 j0 C; `  {8 Q& R2 b/ j: s- G
  46. #define INA219_REG_CALIBRATION                  (u8)(0x05)      // CALIBRATION REGISTER (R/W)
    % H; S3 v* b4 r' H

  47. ; O+ m& O3 O8 Z" Z" j

  48. + ?5 D% Z9 M* r0 I5 d: d; P) s/ u
  49. /*----------------------------------------------------------------------------*/
    1 c5 m6 t7 [1 V% o7 m
  50. // Macros for assigning config bits) c- Y; u! M0 m1 l2 \
  51. #define INA219_CFGB_RESET(x)                    (u16)((x & 0x01) << 15)     // Reset Bit% v( v4 J1 N- T) r7 k; V* m
  52. #define INA219_CFGB_BUSV_RANGE(x)               (u16)((x & 0x01) << 13)     // Bus Voltage Range/ R- V) r) S' d8 m8 d
  53. #define INA219_CFGB_PGA_RANGE(x)                (u16)((x & 0x03) << 11)     // Shunt Voltage Range4 }0 z3 @: o6 q) o: s( n# i  T- p
  54. #define INA219_CFGB_BADC_RES_AVG(x)             (u16)((x & 0x0F) << 7)      // Bus ADC Resolution/Averaging
    # v7 p9 k/ E. v4 r
  55. #define INA219_CFGB_SADC_RES_AVG(x)             (u16)((x & 0x0F) << 3)      // Shunt ADC Resolution/Averaging& B9 ?, A& a) q0 b: N' Z
  56. #define INA219_CFGB_MODE(x)                     (u16) (x & 0x07)            // Operating Mode& I# W- G. V% J6 C, u5 ?0 Y

  57. ; J* Z4 f, a* T5 t

  58. & b1 L! D9 [6 X7 n/ t
  59. /*----------------------------------------------------------------------------*/$ @0 V# @' q( G' s+ T
  60. // Configuration Register7 F  h0 X+ V* {. `3 i. |, F4 m. b+ }
  61. #define INA219_CFG_RESET                        INA219_CFGB_RESET(1)            // Reset Bit9 {* f6 x3 {( S( g5 t) z* r  W$ s
  62. ) n( q) a- P/ |* o3 a* E$ {
  63. #define INA219_CFG_BVOLT_RANGE_MASK             INA219_CFGB_BUSV_RANGE(1)       // Bus Voltage Range Mask9 B" H) {- D3 d( k+ V1 ~
  64. #define INA219_CFG_BVOLT_RANGE_16V              INA219_CFGB_BUSV_RANGE(0)       // 0-16V Range& R# r+ b# L$ g5 Z
  65. #define INA219_CFG_BVOLT_RANGE_32V              INA219_CFGB_BUSV_RANGE(1)       // 0-32V Range (default)
    ( N( N/ H7 i. [0 U
  66. , E3 H( q1 ~% Q
  67. #define INA219_CFG_SVOLT_RANGE_MASK             INA219_CFGB_PGA_RANGE(3)        // Shunt Voltage Range Mask7 Y4 ]: r) S* m. u  E3 A
  68. #define INA219_CFG_SVOLT_RANGE_40MV             INA219_CFGB_PGA_RANGE(0)        // Gain 1, 40mV Range. c* w& {, D5 N7 I) p* [) n5 I
  69. #define INA219_CFG_SVOLT_RANGE_80MV             INA219_CFGB_PGA_RANGE(1)        // Gain 2, 80mV Range
    # x/ m5 d8 r3 k# ^3 N
  70. #define INA219_CFG_SVOLT_RANGE_160MV            INA219_CFGB_PGA_RANGE(2)        // Gain 4, 160mV Range1 s' R# d& P$ W- U' x+ W+ D" X
  71. #define INA219_CFG_SVOLT_RANGE_320MV            INA219_CFGB_PGA_RANGE(3)        // Gain 8, 320mV Range (default)
    # z' o9 f, ?" W& ^

  72. 1 E' |% n, M- e4 d) \; F2 l
  73. #define INA219_CFG_BADCRES_MASK                 INA219_CFGB_BADC_RES_AVG(15)    // Bus ADC Resolution and Averaging Mask0 a1 t3 [& @! a& C" B& ~
  74. #define INA219_CFG_BADCRES_9BIT_1S_84US         INA219_CFGB_BADC_RES_AVG(0)     // 1 x 9-bit Bus sample
    . F& t: X; D- L; S& G& X+ g2 Q# K
  75. #define INA219_CFG_BADCRES_10BIT_1S_148US       INA219_CFGB_BADC_RES_AVG(1)     // 1 x 10-bit Bus sample: U. ?9 d) o7 i4 {: q
  76. #define INA219_CFG_BADCRES_11BIT_1S_276US       INA219_CFGB_BADC_RES_AVG(2)     // 1 x 11-bit Bus sample* |7 B: W' W* C
  77. #define INA219_CFG_BADCRES_12BIT_1S_532US       INA219_CFGB_BADC_RES_AVG(3)     // 1 x 12-bit Bus sample (default)9 |2 d  i2 y7 [' o" j
  78. #define INA219_CFG_BADCRES_12BIT_2S_1MS         INA219_CFGB_BADC_RES_AVG(9)     // 2 x 12-bit Bus samples averaged together: G. |- u! v$ x
  79. #define INA219_CFG_BADCRES_12BIT_4S_2MS         INA219_CFGB_BADC_RES_AVG(10)    // 4 x 12-bit Bus samples averaged together
    3 e* J2 X! [) J; ?
  80. #define INA219_CFG_BADCRES_12BIT_8S_4MS         INA219_CFGB_BADC_RES_AVG(11)    // 8 x 12-bit Bus samples averaged together
    1 m5 D- l  m- l8 c7 X% K7 h
  81. #define INA219_CFG_BADCRES_12BIT_16S_8MS        INA219_CFGB_BADC_RES_AVG(12)    // 16 x 12-bit Bus samples averaged together
    & C: m% j! m' a/ F
  82. #define INA219_CFG_BADCRES_12BIT_32S_17MS       INA219_CFGB_BADC_RES_AVG(13)    // 32 x 12-bit Bus samples averaged together
    " h# m- w; L. j. G/ W/ C* F
  83. #define INA219_CFG_BADCRES_12BIT_64S_34MS       INA219_CFGB_BADC_RES_AVG(14)    // 64 x 12-bit Bus samples averaged together, u. h; b0 |7 S6 D; E8 t
  84. #define INA219_CFG_BADCRES_12BIT_128S_68MS      INA219_CFGB_BADC_RES_AVG(15)    // 128 x 12-bit Bus samples averaged together
    ( L2 r* G4 _& D+ ?, b

  85. & D2 h% A5 H1 r9 i) s/ }
  86. #define INA219_CFG_SADCRES_MASK                 INA219_CFGB_SADC_RES_AVG(15)    // Shunt ADC Resolution and Averaging Mask* D. g0 ]4 Y7 Z
  87. #define INA219_CFG_SADCRES_9BIT_1S_84US         INA219_CFGB_SADC_RES_AVG(0)     // 1 x 9-bit Shunt sample/ o8 N. o3 `3 W! `1 O6 C
  88. #define INA219_CFG_SADCRES_10BIT_1S_148US       INA219_CFGB_SADC_RES_AVG(1)     // 1 x 10-bit Shunt sample0 o, I" u# x) q" U) I# t0 J' h
  89. #define INA219_CFG_SADCRES_11BIT_1S_276US       INA219_CFGB_SADC_RES_AVG(2)     // 1 x 11-bit Shunt sample9 x5 `) W# }4 I! L
  90. #define INA219_CFG_SADCRES_12BIT_1S_532US       INA219_CFGB_SADC_RES_AVG(3)     // 1 x 12-bit Shunt sample (default)
    $ ]# Z4 y, }7 X/ B  M, D6 C
  91. #define INA219_CFG_SADCRES_12BIT_2S_1MS         INA219_CFGB_SADC_RES_AVG(9)     // 2 x 12-bit Shunt samples averaged together
    / O% q! {! e- k) q( ^. ^$ \: R
  92. #define INA219_CFG_SADCRES_12BIT_4S_2MS         INA219_CFGB_SADC_RES_AVG(10)    // 4 x 12-bit Shunt samples averaged together
    & E2 l: y% g3 Q0 q7 I3 M
  93. #define INA219_CFG_SADCRES_12BIT_8S_4MS         INA219_CFGB_SADC_RES_AVG(11)    // 8 x 12-bit Shunt samples averaged together7 Y& K6 o+ I8 j9 k
  94. #define INA219_CFG_SADCRES_12BIT_16S_8MS        INA219_CFGB_SADC_RES_AVG(12)    // 16 x 12-bit Shunt samples averaged together/ x5 @& ]) z" X4 m! Z! z
  95. #define INA219_CFG_SADCRES_12BIT_32S_17MS       INA219_CFGB_SADC_RES_AVG(13)    // 32 x 12-bit Shunt samples averaged together, z3 E( k. D; H1 A# Z9 d- G
  96. #define INA219_CFG_SADCRES_12BIT_64S_34MS       INA219_CFGB_SADC_RES_AVG(14)    // 64 x 12-bit Shunt samples averaged together
    # W1 I* f4 W/ g. E3 V* B2 n
  97. #define INA219_CFG_SADCRES_12BIT_128S_68MS      INA219_CFGB_SADC_RES_AVG(15)    // 128 x 12-bit Shunt samples averaged together; t! c' o9 z- `; Z) ~% G0 @
  98. 5 u" c3 h* x' m2 E
  99. #define INA219_CFG_MODE_MASK                    INA219_CFGB_MODE(7)             // Operating Mode Mask5 Y! f" W, d6 f1 z' ~
  100. #define INA219_CFG_MODE_POWERDOWN               INA219_CFGB_MODE(0)             // Power-Down' p- W: t# Y; H
  101. #define INA219_CFG_MODE_SVOLT_TRIGGERED         INA219_CFGB_MODE(1)             // Shunt Voltage, Triggered
    . e$ Z8 `+ L4 ]- w* ^7 W
  102. #define INA219_CFG_MODE_BVOLT_TRIGGERED         INA219_CFGB_MODE(2)             // Bus Voltage, Triggered
    ( Y1 z; T8 ^% O8 p4 x
  103. #define INA219_CFG_MODE_SANDBVOLT_TRIGGERED     INA219_CFGB_MODE(3)             // Shunt and Bus, Triggered
    / s+ W- u% O4 t
  104. #define INA219_CFG_MODE_ADCOFF                  INA219_CFGB_MODE(4)             // ADC Off (disabled)! Z* W( z. F- r- v
  105. #define INA219_CFG_MODE_SVOLT_CONTINUOUS        INA219_CFGB_MODE(5)             // Shunt Voltage, Continuous: [5 ^- q. V  ^4 {
  106. #define INA219_CFG_MODE_BVOLT_CONTINUOUS        INA219_CFGB_MODE(6)             // Bus Voltage, Continuous
    ' M) M5 n1 w1 X0 b" X: R* c2 f
  107. #define INA219_CFG_MODE_SANDBVOLT_CONTINUOUS    INA219_CFGB_MODE(7)             // Shunt and Bus, Continuous (default)
    ' \2 `3 K: o+ m; O$ f' S
  108. * [( o3 f: M, Z' m4 T8 C! ?

  109. 9 n' Z5 q7 G" t
  110. /*----------------------------------------------------------------------------*/: {/ M: y" J0 k
  111. // Bus Voltage Register: z1 V$ ^! b( C6 R7 ]/ F: V
  112. #define INA219_BVOLT_CNVR                       (u16)(0x0002)       // Conversion Ready/ g( T0 N" ?. }0 t8 ^! L
  113. #define INA219_BVOLT_OVF                        (u16)(0x0001)       // Math Overflow Flag% o* b8 \3 Z$ T

  114. " F0 p3 T, e2 A* i
  115. typedef struct
    , w& d3 _, C8 J' `& w2 @% G
  116. {
    . a) m9 x3 p, G" I
  117.   signed short voltage_ina219;
    8 J# {5 Y9 s: X  b0 U' u9 g8 D' _
  118.   signed long shunt_ina219;7 H0 J; s% y4 k, a
  119.   signed long current_ina219;8 W7 t0 b+ x0 f
  120.   signed long power_ina219;/ b% ?6 j0 u! L3 f- k
  121. }INA219_DATA;/ _3 @6 G3 ?" k4 [! `

  122. 6 [* M! q& {; o2 W
  123. + K* T" J( h% i2 e
  124. extern u8  ina219_busVolt_LSB_mV;) ]! C1 i. p$ @6 x7 K. a# Z  f0 ~6 D8 d
  125. extern u8  ina219_shuntVolt_LSB_uV;; A, ^8 t5 c& F- ^6 ]# D( H& T
  126. extern unsigned short ina219_calValue;) d9 |& y' g# S" i+ T  i) q5 H3 Z5 p9 G

  127. 6 N  U% X8 a% J. D" ?* |
  128. extern u32 ina219_current_LSB_uA;3 q7 p1 g1 L6 S$ W$ ?3 z% }  ?
  129. extern u32 ina219_power_LSB_mW;7 P' Y8 O4 h& }% Y+ r% G2 H7 N

  130. 0 u0 S# [. M+ w% A
  131. extern void ina219_init(void);' C; m! F6 [& ], e% T0 H2 A. j
  132. extern void INA_Process(void);) K, p0 r$ {' y" }! a! W
  133. extern signed short ina219_GetBusVoltage_raw(void);
    & I6 e3 }: p1 i; n5 e1 Q
  134. extern signed short ina219_GetCurrent_raw(void);
    . k- u# H4 d9 y
  135. extern signed short ina219_GetBusVoltage_mV(void);
    8 N. P6 j# Y% }* |' n9 L6 @* f
  136. extern s32 ina219_GetShuntVoltage_uV(void);
    $ x  B- i  b) b
  137. extern s32 ina219_GetCurrent_uA(void);3 S6 Z1 Y3 g5 s. i1 E; j# \) x) b
  138. extern s32 ina219_GetPower_mW(void);
    0 C# p6 c& x- b, b4 j* }! G$ J
  139. 7 B/ R' g/ t1 q% j5 b$ R
  140. #endif
复制代码
0 s  D1 Y+ e9 S# \

5 O; ]: K5 D' S8 O
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。
7 w9 b/ h$ I* n% j2 w
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