【经验分享】INA219驱动，基于STM32(STM8移植可用)

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STMCU小助手发布时间：2022-2-8 21:06

文章
文章封面:
文章简介:	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。

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

int main(void)
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{
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ina219_init();
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while(1)
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//根据具体需求调用检测电流电压的函数7 Z! P" o6 ^3 `4 l
}
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}

复制代码

ina219.c

#include "ina219.h"/ ?. W/ l) B! O+ u: q; ?
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u8 ina219_busVolt_LSB_mV = 4; // Bus Voltage LSB value = 4mV
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u8 ina219_shuntVolt_LSB_uV = 10; // Shunt Voltage LSB value = 10uV
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unsigned short ina219_calValue = 0;
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u32 ina219_current_LSB_uA;* M$ x' e7 D2 u$ {; }5 A, i
u32 ina219_power_LSB_mW;
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INA219_DATA ina219_data;
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void INA_SCL_OUT(void)* ^* E6 G: A- O5 M* c% q- {
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);/ Q* l0 W0 c1 t0 ^3 p5 u; l
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/* Configure I2C1 pins: PB12->SCL->OUT */
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GPIO_InitStructure.GPIO_Pin = INA219_I2C_SCL_PIN;0 f8 n4 h8 y8 f/ Q6 Y
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);
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GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SCL_PIN);
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}
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void INA_SDA_OUT(void)
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GPIO_InitTypeDef GPIO_InitStructure;/ z. O( f% Z' j9 b! S7 y
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RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);3 _" r. L' X* [/ b0 _! T1 o* V
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/* Configure I2C1 pins: PB14->SDA-OUT */
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GPIO_InitStructure.GPIO_Pin = INA219_I2C_SDA_PIN;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;$ Y# i0 L7 C0 I9 }0 ~
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);; x5 U& @& P2 s! A
GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SDA_PIN);; S+ [ ? N, j9 p C$ }3 f
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void INA_SDA_IN(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_APB2PeriphClockCmd(INA219_I2C_GPIO_CLOCK, ENABLE);4 y+ T& j; M- i3 S0 s
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/* Configure I2C1 pins: PB14->SDA-IN */
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GPIO_InitStructure.GPIO_Pin = INA219_I2C_SDA_PIN;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
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GPIO_Init(INA219_I2C_PORT, &GPIO_InitStructure);& g% |% v( q4 A+ T/ a. ^! F
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void INA_IIC_Start(void)
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{
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INA_SDA_OUT();
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INA_SCL_OUT();
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INA_SDA_SET;
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INA_SCL_SET;
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INA_SDA_CLR;
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INA_SCL_CLR;3 F$ I+ b. L; @0 f
}
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void INA_IIC_Stop(void); p$ U! j; D. O. U1 a1 z
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INA_SDA_OUT();8 W j7 l" W# c' k* Y& _9 O
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INA_SDA_CLR;
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INA_SCL_SET;
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INA_SDA_SET;
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void INA_IIC_Set_Ack(unsigned char ack)
{
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INA_SDA_OUT();8 R2 u9 s+ e, p" n) `
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if(ack)- K, P1 ^5 { w
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INA_SDA_SET;
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else
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INA_SDA_CLR; {$ Y; _; ]4 }& s
}
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INA_SCL_SET;
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INA_SCL_CLR;8 q: c/ r0 g+ l; z5 b" h) ?, z' z( ^, [
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unsigned char INA_IIC_Get_Ack(void)& R& g! R+ E$ B }) H0 V
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unsigned char ack;5 b ^' w1 v/ V3 [% k5 @" I) y8 ?" ?
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INA_SDA_IN();- _8 V8 f/ w9 d) n6 d
INA_SDA_SET;
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INA_SCL_SET;
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if(INA_SDA_TST)
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ack = 1;3 r6 B ?/ }0 h0 V; c& o; @
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else
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{
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ack = 0;
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INA_SCL_CLR;
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return(ack);
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void INA_IIC_Write_8bits(unsigned char dat)
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unsigned char i;
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INA_SDA_OUT();9 N$ _1 |8 l1 B' W! f9 O
for(i = 8; i; i--)" E5 F0 z4 w% U9 c2 R' a
{
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if(dat & 0x80)
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INA_SDA_SET;3 A8 ?& |& C7 Z- q l
}
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else
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INA_SDA_CLR;
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}
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INA_SCL_SET;0 i% W. F1 P/ \. @8 }- g
dat <<= 1;
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INA_SCL_CLR;
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}
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}; a |) Y8 S! `4 T
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unsigned char INA_IIC_Read_8bits(void)1 y! [. |" m) d( Q
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unsigned char i, dat;; N* I: [' B' m! m4 x& }: K' R, S/ \9 l
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INA_SDA_IN();: u- e$ N; b) V: E0 v. f# x- |
INA_SDA_SET;
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dat = 0;
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for(i = 8; i; i--), n4 m, Z; [6 j
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INA_SCL_SET;
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dat <<= 1;4 Y7 B) m6 ^$ f0 l6 F& Q
if(INA_SDA_TST)
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dat++;
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INA_SCL_CLR;
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return(dat);2 i" r6 o" j, c, W
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void INA_IIC_Write_Byte(unsigned char reg, unsigned char dat)
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unsigned char dev = INA219_I2C_ADDRESS;
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INA_IIC_Start();4 M& Q" }, X0 P) p: o
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// dev &= ~0x01;! r3 T$ Y4 }! E! z8 _' {, i2 }
INA_IIC_Write_8bits(dev);
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INA_IIC_Get_Ack();
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INA_IIC_Write_8bits(reg);
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INA_IIC_Get_Ack();, ~+ m! Q8 r |" j% O/ w% i
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INA_IIC_Write_8bits(dat);) @; K9 W. U' g6 ~
INA_IIC_Get_Ack();) \) m+ p: F6 E( v
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INA_IIC_Stop();6 a$ P9 t; y! ^6 S
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unsigned char INA_IIC_Read_Byte(unsigned char reg)
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unsigned char dat;& ]% h) B4 [5 u0 i) e7 t
unsigned char dev = INA219_I2C_ADDRESS;
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INA_IIC_Start();
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// dev &= ~0x01;) u+ O$ K4 ]3 W7 y9 J- M, r9 f$ ^6 j
INA_IIC_Write_8bits(dev);5 N0 E, C% K! m, }5 o. X" z
INA_IIC_Get_Ack();
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INA_IIC_Write_8bits(reg);6 u$ I6 C# {5 ^; j- O
INA_IIC_Get_Ack();7 S$ c: V% D: T/ l
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INA_IIC_Start();6 {4 W/ Q& _8 u& A0 n# K
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dev |= 0x01;0 T U( E" t% q3 }, o5 K) {0 Y
INA_IIC_Write_8bits(dev);% K! \- _ P; u, D Y' y9 w
INA_IIC_Get_Ack();
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dat = INA_IIC_Read_8bits(); _* A+ D* L7 ^5 T, w7 k
INA_IIC_Set_Ack(1);+ b0 v. C0 t2 |0 W* Z
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INA_IIC_Stop();( b; F3 ^* ^1 O
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return (dat);
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void INA_IIC_Write_Bytes(unsigned char reg, unsigned char *dat, unsigned char num)6 \' _& {# J* J f2 d0 F
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unsigned char dev = INA219_I2C_ADDRESS;( C1 G, l- z6 q! T
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INA_IIC_Start();
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// dev &= ~0x01;" h W7 C0 S2 {( Y6 w
INA_IIC_Write_8bits(dev);
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INA_IIC_Get_Ack();3 d* Q" q9 t8 C! u' H; t
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INA_IIC_Write_8bits(reg);+ ], G$ z7 p9 d3 X
INA_IIC_Get_Ack();- j5 N2 Y' f2 P4 i. f
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while(num--)
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{
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INA_IIC_Write_8bits(*dat);' S2 U) I% d7 s7 U' u8 _
INA_IIC_Get_Ack();
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dat++;* O9 W7 r8 I) i
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INA_IIC_Stop();3 o3 j; r% @4 e7 h B F
}
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void INA_IIC_Read_Bytes(unsigned char reg, unsigned char *dat, unsigned char num)
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unsigned char *tmp = dat;! ?, V' O/ N& r4 E& x8 V
unsigned char dev = INA219_I2C_ADDRESS;
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INA_IIC_Start();
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// dev &= ~0x01;
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INA_IIC_Write_8bits(dev);. ^, m- c, {! M, ~7 c1 M
INA_IIC_Get_Ack();
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INA_IIC_Write_8bits(reg);
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INA_IIC_Get_Ack();" |- O6 }$ q$ i# O
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INA_IIC_Start();
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dev |= 0x01;
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INA_IIC_Write_8bits(dev);, ]0 d: \% b* ^! l3 H, h
INA_IIC_Get_Ack();9 ?. O8 c. z$ H: a
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while(num--)- w K( B1 p& o0 W
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*tmp = INA_IIC_Read_8bits();
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if(num == 0)/ z( G5 C" f# {! E( V( g- T( J% [
INA_IIC_Set_Ack(1);
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else* K5 V8 G( i% o: q s
INA_IIC_Set_Ack(0);. p& d; ?) U; G1 D/ z" S, @8 ^
tmp++; V* ?/ n# P' k1 ]
}
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INA_IIC_Stop();
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void ina219_Write_Register(unsigned char reg, unsigned int dat)" V" @# C( N9 @+ \
{
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unsigned char val[2];( O2 ]7 l+ s- x$ y5 h
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val[0] = (unsigned char)(dat >> 8);
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val[1] = (unsigned char)(dat & 0xFF);
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INA_IIC_Write_Bytes(reg, val, 2);
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}
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void ina219_Read_Register(unsigned char reg, signed short *dat)) X% [, R; F: s! J
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//printf("read reg == %d\r\n",reg);
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unsigned char val[2];
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INA_IIC_Read_Bytes(reg, val, 2);8 l% E) e: y6 E8 h; e4 K$ D$ N/ X
*dat = ((unsigned int)(val[0]) << 8) + val[1];- H/ R1 @) `7 ~: H8 L1 w; p
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//printf("data1 == %x\r\n",val[0]);
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//printf("data2 == %x\r\n",val[1]);5 [- }7 {7 o9 F9 o1 C; W
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// INA219 Set Calibration 16V/16A(Max) 0.02¦¸7 l8 k5 o5 `- w! A l+ t B9 j
void ina219_SetCalibration_16V_16A(void)0 L# Y# p4 v8 l0 l$ x# T6 E
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u16 configValue;
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// By default we use a pretty huge range for the input voltage,
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// which probably isn't the most appropriate choice for system6 J) D& n' u$ B+ n
// that don't use a lot of power. But all of the calculations
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// are shown below if you want to change the settings. You will8 ~3 k% m( L1 F* B0 k- l
// also need to change any relevant register settings, such as) D7 Q; N5 E# k+ c0 ?( r. H
// setting the VBUS_MAX to 16V instead of 32V, etc.
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// VBUS_MAX = 16V (Assumes 16V, can also be set to 32V)
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// VSHUNT_MAX = 0.32 (Assumes Gain 8, 320mV, can also be 0.16, 0.08, 0.04)
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// RSHUNT = 0.02 (Resistor value in ohms)
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// 1. Determine max possible current! c2 \6 C9 [9 [, `: X
// MaxPossible_I = VSHUNT_MAX / RSHUNT( R4 e) n* ]' j) p2 F& V! ]
// MaxPossible_I = 16A
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// 2. Determine max expected current
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// MaxExpected_I = 16A
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// 3. Calculate possible range of LSBs (Min = 15-bit, Max = 12-bit). Y. t9 J% n3 ^8 c) P& v4 w3 X% a
// MinimumLSB = MaxExpected_I/32767
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// MinimumLSB = 0.00048 (0.48mA per bit)" a- z8 _3 |4 {+ `- U, m
// MaximumLSB = MaxExpected_I/4096: B* k1 z2 Q7 a1 V( }
// MaximumLSB = 0,00390 (3.9mA per bit)
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// 4. Choose an LSB between the min and max values; V, _- X+ U: g# H: v0 Q h
// (Preferrably a roundish number close to MinLSB)( t: E+ D5 i: P) ] u1 M
// CurrentLSB = 0.00050 (500uA per bit)
% ^% V7 }/ b1 Q
9 q: o. j) l7 j8 g r
// 5. Compute the calibration register
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// Cal = trunc (0.04096 / (Current_LSB * RSHUNT))
) o2 j) m2 h+ p! ?7 X& X
// Cal = 4096 (0x1000)
/ E' s2 u& |) n; z
' `* }: g+ M! h* f; H& l4 M
ina219_calValue = 0x1000;4 Q$ |% ]! D b! S. @) F
/ `% w+ I9 x1 E3 n* b' f3 R" U
// 6. Calculate the power LSB
, Y0 j3 s5 L: _" m2 r
// PowerLSB = 20 * CurrentLSB4 _2 t5 o8 R7 i' l; N$ W" R
// PowerLSB = 0.01 (10mW per bit), p$ T, h1 e% {5 l) \
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// 7. Compute the maximum current and shunt voltage values before overflow
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//1 _8 E5 {8 s! Q
// Max_Current = Current_LSB * 32767/ R8 _1 I! B. ?: Y# N
// Max_Current = 16.3835A before overflow) b) N! E1 N& F6 f- E# Q
//. ?+ f9 G- j# H
// If Max_Current > Max_Possible_I then1 u- E! o- r" q3 r; f( L
// Max_Current_Before_Overflow = MaxPossible_I
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// Else
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// Max_Current_Before_Overflow = Max_Current: Y5 Y% F5 E1 y2 g
// End If
b2 `, h/ O9 Z0 x$ K/ u5 |: C# l
//
5 p. j# v; B, q
// Max_ShuntVoltage = Max_Current_Before_Overflow * RSHUNT0 F- H0 m: a+ o9 ]9 q* \; B
// Max_ShuntVoltage = 0.32V7 S0 J, Y% i" ]9 D
//
// If Max_ShuntVoltage >= VSHUNT_MAX
, K# g0 F, H8 e- Q! l& _
// Max_ShuntVoltage_Before_Overflow = VSHUNT_MAX, R' R& w& d! h
// Else3 X9 E8 V" Y& y. G( B+ _/ x
// Max_ShuntVoltage_Before_Overflow = Max_ShuntVoltage1 D# V; |! L* O
// End If
7 M0 |2 U& J; M- E% n. V- x" B
3 B# t" t! U- X% h. E! e
// 8. Compute the Maximum Power" K( g" O- ], u- b
// MaximumPower = Max_Current_Before_Overflow * VBUS_MAX
" r ~% `- K( ^2 O; N: E" {' q% w
// MaximumPower = 1.6 * 16V
" W- O1 r! b/ m. a/ [
// MaximumPower = 256W
- M8 z0 W D# V# O1 l' P
8 l8 h! X! T5 m9 x
// Set multipliers to convert raw current/power values
4 R" `5 @" Q: B! m: B' O/ K
ina219_current_LSB_uA = 500; // Current LSB = 500uA per bit
4 d, W7 J, |0 T" \7 U- Y# n% y! H
ina219_power_LSB_mW = 10; // Power LSB = 10mW per bit = 20 * Current LSB1 ~. B. T( C# f( {
0 @- L% }- p- F
// Set Calibration register to 'Cal' calculated above. a- F) d5 Q7 C3 M6 x
ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);/ f+ w8 @- H8 b* y
6 r. J8 [6 D+ y
// Set Config register to take into account the settings above
: Q8 v, v8 i+ p3 E$ D6 j4 M( ^. X
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 );
4 w) c3 V( Q4 M6 U5 ^
# a# h% e2 Y5 K( d9 f" \
ina219_Write_Register(INA219_REG_CONFIG, configValue);( P3 H( ^1 R# L0 x' \0 h
}
8 V) P: m0 l! M* S1 x9 P: D9 Y
1 D4 Y( f6 @1 h
void ina219_configureRegisters(void)5 t1 @7 y! s/ s( @7 g9 t
{
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DelayMs(15);
7 m+ d& O* H; t( E$ E& q) J+ W
& T/ K6 c2 ]) ~, c, d6 C/ \) X
ina219_SetCalibration_16V_16A();
) e0 R* {: \. \+ x* ~4 |
}$ s0 V$ f% a) }% r. o( _) \$ w7 M
; C4 u8 U2 `& \) G
void ina219_gpio_init(void)" X' Y7 D7 f1 X# B; a) }9 O
{
6 W3 x; L- s" |7 z U; u8 ~- S, T7 W
INA_SCL_OUT();8 ?. J& P& G" r% H* M4 D
INA_SDA_OUT();: ]( Y9 G; N2 S7 B x# X
}% V4 `3 n% Y& C2 C. o
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void ina219_init(void)
0 ], D1 z3 \+ o p& H* e& I# Y
{, [" I' J7 T! \' ?( P2 I
ina219_gpio_init();$ t+ o2 j* y- b7 x9 F
3 P% K$ Q0 N. o2 r8 U. ^
ina219_configureRegisters();
. V5 Y" H }& Z3 F M8 y2 `5 U
}- [% @8 `& l- g: Y
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: _6 b; v) T# P2 C$ T
/* ÕâÀïÒÔÉÏÊÇ³õÊ¼»¯º¯Êý */) H9 R) Q; D7 b* H ]( L1 ~
/* ´ÓÕâÀïÍùÏÂÊÇ¹¦ÄÜº¯Êý */5 u$ v$ [* O! T. h/ K
# c) V b9 c) j7 q. Q
5 {+ n- j( E& ?. |+ N
signed short ina219_GetBusVoltage_raw(void)! Q( | _3 `( K! n5 O: S9 H1 u
{# ^1 m. _+ i5 @: a: i: \
signed short val;* I7 a0 \1 g) m0 S0 G" L5 `- W
+ s8 c2 Z8 N- G) r7 E
ina219_Read_Register(INA219_REG_BUSVOLTAGE, &val);/ E5 s4 ^; x. M+ F b- z) r" E6 F
val >>= 3; // Shift to the right 3 to drop CNVR and OVF
% L/ c& e- V- v0 L$ n: `1 D8 e: w
' Z6 `0 a2 F6 Z& j; V4 N3 r
return (val);& D6 w# X7 F1 F+ x& E: s0 b
}
8 I+ v9 K, @2 U! ^6 Z' }
% _+ x6 y6 ^ [/ s* o- w
signed short ina219_GetCurrent_raw(void)
* }- r* ~' X6 x4 ]
{) W8 `6 a0 Q1 g: [0 M4 W2 e
signed short val;
4 N. {- o& U$ d% m/ ^% y
' r4 o" B0 u/ @) E Y- a
// Sometimes a sharp load will reset the INA219, which will# t. r$ ~5 _: J, [4 S* P Q Y
// reset the cal register, meaning CURRENT and POWER will( ~* ^ P: m( ^
// not be available ... avoid this by always setting a cal
/ w% P, h/ _: v8 s" w, S
// value even if it's an unfortunate extra step, i0 D) j6 e) l0 v. `
ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
" x4 C6 ^8 P; A1 L
# ^8 ]) s: j6 X1 e$ A7 p
// Now we can safely read the CURRENT register!# F+ N C! n4 l7 a/ Y' s. r
ina219_Read_Register(INA219_REG_CURRENT, &val);
: b2 w6 H4 ~; t% f. s- u# R/ v
2 I6 a2 c0 l+ D- O: y" T- {
return (val);
) U% }' D. h4 Y1 f% y \0 k3 W
}
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/ b1 j, C0 ?3 M+ P3 z" Q* X! U2 H
/ ~3 Y ^$ Q' n) l* y
signed short ina219_GetBusVoltage_mV(void): K) s- I( J" e
{+ w: w0 M5 u1 K. a* `
signed short val;
) K; O1 V: ~) P3 F
0 z1 G5 `. I# m: p& p' D
ina219_Read_Register(INA219_REG_BUSVOLTAGE, &val);
9 p8 `# T4 k" S' j
val >>= 3; // Shift to the right 3 to drop CNVR and OVF
+ C6 b4 R$ c( N
val *= ina219_busVolt_LSB_mV; // multiply by LSB(4mV)6 N j2 g# r- {" {( T9 V5 P
# w$ m G' c# Y8 C4 w* [
return (val);- p: g3 u! M# h
}
: q ~4 K9 i: w j% E
& h: C( c5 X5 e" r5 k3 E) F
s32 ina219_GetShuntVoltage_uV(void)0 ^) {4 ]9 p5 m z6 n. ?
{; s# }- u1 [5 b% N
s32 val;5 D' I; k. E/ f7 z& o6 Y l" a
s16 reg;
+ Z/ I' @" Q( S6 f8 f% W; w
' p. O( I7 {/ [- _) j9 {# Q6 L+ M
ina219_Read_Register(INA219_REG_SHUNTVOLTAGE, ®);
" l6 {6 k1 |4 U! L6 p8 s. }
val = (s32)reg * ina219_shuntVolt_LSB_uV; // multiply by LSB(10uV)
9 i3 r+ P% j& N
/ H0 r- q% T5 d/ \1 p+ u7 y T
return (val);8 ? P8 \1 g5 D& x! `1 ~
}2 g: L2 H" L4 }3 g
2 K8 |/ y+ B- L1 s
s32 ina219_GetCurrent_uA(void); o2 y- }& W3 u. J: m+ _. U
{' }5 U& a$ o4 ^# m
s32 val;9 s9 s* [& K3 Z+ h
s16 reg;( u( s' w: v0 `. O s3 T2 O N
* @" C/ m3 X' P
// Sometimes a sharp load will reset the INA219, which will% j5 o. i* d% j1 U9 z1 J
// reset the cal register, meaning CURRENT and POWER will
% j; u2 @% L2 T: r4 |. J3 z
// not be available ... avoid this by always setting a cal/ g( u. K+ G2 `& N6 a
// value even if it's an unfortunate extra step
8 ^6 h2 K# v9 ?+ d( m: `, o f5 _7 ~
ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
# F7 b+ W7 w) v1 c4 t
7 L2 v4 N8 Y# |" j/ ` p
// Now we can safely read the CURRENT register!
% R/ C0 c, }$ d$ q/ p6 g* [
ina219_Read_Register(INA219_REG_CURRENT, ®);
4 p4 q9 J5 c/ U1 J( Z
2 `! }9 M3 W% m' R% C. _' T
val = (s32)reg * ina219_current_LSB_uA;. Z; Q3 ?1 r' U! x% c! E/ U1 G
+ w: Q! o7 k( {. Y0 o" G# r& F
return (val);
/ `2 s0 X; J0 o f. t- o
}
M7 C& G& r' [2 m
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s32 ina219_GetPower_mW(void)
|# K7 i& ~ Y6 w; |
{3 j2 I) e' B! ]2 {$ v/ y Y
s32 val;
: Y f( @: J/ L
s16 reg;( v: M" q6 x6 n; q
# x" O2 t2 l4 v9 T9 m2 n$ }1 r0 ~* [
// Sometimes a sharp load will reset the INA219, which will; k; S3 Y; Q1 c) Y( N6 L3 j3 }
// reset the cal register, meaning CURRENT and POWER will$ I' Q& Y; u: M% c4 ^4 }
// not be available ... avoid this by always setting a cal! X- {, h( E2 h; a, Q
// value even if it's an unfortunate extra step) p7 O8 z) E( u# V% q! S4 \
ina219_Write_Register(INA219_REG_CALIBRATION, ina219_calValue);
" d$ }" ~& E; X
' X% g; o* C5 M+ `5 y, H
// Now we can safely read the POWER register!+ u/ p2 f: S6 L" R
ina219_Read_Register(INA219_REG_POWER, ®);. p1 n6 M# n6 I# i; ?0 ?
/ W- B/ M, G3 w4 z1 o
val = (s32)reg * ina219_power_LSB_mW;; C; @6 f$ A! o6 i( R; H" ?' \- v
( _/ s2 t. w, J- A- V
return (val);' p; B5 e$ b: o8 ]# R
}- Y; p* {: @+ |+ _- @9 j2 ]) A0 Y
6 e, A0 [! a) i( X; }7 x
void INA_Process(void)6 d1 o6 I) n4 M/ K
{. X/ {6 r- a) v- {
if(INA219process_flag == Open)" {2 v7 w: T3 ?, `5 N0 d) u. x
{; z$ ]) R- p& N$ D
INA219process_flag = Close;
7 A5 c; S4 G/ z+ [# v+ j
* l7 E! g. T4 N& R* M
ina219_data.voltage_ina219 = ina219_GetBusVoltage_mV();
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printf("voltage_ina219 is %d\r\n",ina219_data.voltage_ina219);
% D6 O0 S5 G: A0 a6 N
! ^: ]6 M% C) h+ s
ina219_data.shunt_ina219 = ina219_GetShuntVoltage_uV();
; j/ ~$ B9 u* c4 n$ Z
printf("shunt_ina219 is %ld\r\n",ina219_data.shunt_ina219);
' O: ?) d0 z* O5 e7 i+ K
; B P7 Z4 A* `( E4 F! `
/ l4 V, q/ l& I+ [1 C) c5 V
ina219_data.current_ina219 = ina219_GetCurrent_uA();. ` ?% n+ X# m" p9 w
printf("current_ina219 is %ld\r\n",ina219_data.current_ina219);
7 m5 J5 }0 K. T( E
S" k. [5 Y6 A
ina219_data.power_ina219 = ina219_GetPower_mW();
) N# Y7 \* c: ]9 g' v
printf("power_ina219 is %ld\r\n",ina219_data.power_ina219);/ K; r% s; e' I, K' R; q, f
}
7 {0 n! x; P H E' X
}

复制代码

ina219.h

#ifndef __INA219_H
& _' D/ W0 J5 ~
#define __INA219_H
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#include "main.h", b4 F( h7 z% z/ U* x6 m3 B
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#define INA219_I2C_PORT GPIOB h, {2 K& l7 X: X0 Y
#define INA219_I2C_GPIO_CLOCK RCC_APB2Periph_GPIOB
/ G8 Z9 |8 r9 V- \6 i
#define INA219_I2C_SCL_PIN GPIO_Pin_120 d/ c) h/ v" [2 I+ t6 x
#define INA219_I2C_SDA_PIN GPIO_Pin_14
. }5 v8 I- H, ?" f
0 ^* w1 O' B+ z7 _
#define INA_SCL_SET GPIO_SetBits(INA219_I2C_PORT,INA219_I2C_SCL_PIN)( [$ k+ c; f- l F
#define INA_SDA_SET GPIO_SetBits(INA219_I2C_PORT, INA219_I2C_SDA_PIN)
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#define INA_SCL_CLR GPIO_ResetBits(INA219_I2C_PORT,INA219_I2C_SCL_PIN)# f0 n0 ] \: l" v& m+ V
#define INA_SDA_CLR GPIO_ResetBits(INA219_I2C_PORT,INA219_I2C_SDA_PIN)- H9 K P4 m, U7 V3 h
9 ?" \+ Q; ?6 ^+ }% v
#define INA_SDA_TST GPIO_ReadInputDataBit(INA219_I2C_PORT,INA219_I2C_SDA_PIN)! k' v) y4 P* a- S$ t
; G; J9 d4 m! a! z
/*----------------------------------------------------------------------------*/$ t7 A2 ~5 M. Q6 B
// I2C Address Options! l# E$ j" t; a
#define INA219_I2C_ADDRESS_CONF_0 (u8)(0x40 << 1) // A0 = GND, A1 = GND# `' p! `, q o, l( W" g
#define INA219_I2C_ADDRESS_CONF_1 (u8)(0x41 << 1) // A0 = VS+, A1 = GND
; ?( i0 b" U1 i
#define INA219_I2C_ADDRESS_CONF_2 (u8)(0x42 << 1) // A0 = SDA, A1 = GND+ u+ y# V G4 b4 e h4 M
#define INA219_I2C_ADDRESS_CONF_3 (u8)(0x43 << 1) // A0 = SCL, A1 = GND; C" u5 S! b; N8 l! K2 N
#define INA219_I2C_ADDRESS_CONF_4 (u8)(0x44 << 1) // A0 = GND, A1 = VS+
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#define INA219_I2C_ADDRESS_CONF_5 (u8)(0x45 << 1) // A0 = VS+, A1 = VS+
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#define INA219_I2C_ADDRESS_CONF_6 (u8)(0x46 << 1) // A0 = SDA, A1 = VS+5 |0 b5 \( i) M7 N4 ~! t/ l* b" o/ ]
#define INA219_I2C_ADDRESS_CONF_7 (u8)(0x47 << 1) // A0 = SCL, A1 = VS+
2 e t4 q; ?3 Q
#define INA219_I2C_ADDRESS_CONF_8 (u8)(0x48 << 1) // A0 = GND, A1 = SDA
8 H2 v a7 s+ \% [% g7 Q
#define INA219_I2C_ADDRESS_CONF_9 (u8)(0x49 << 1) // A0 = VS+, A1 = SDA
7 e+ L+ D5 q1 W, v* q) G& L- S ]
#define INA219_I2C_ADDRESS_CONF_A (u8)(0x4A << 1) // A0 = SDA, A1 = SDA0 e1 W6 g q: s% B- b, y
#define INA219_I2C_ADDRESS_CONF_B (u8)(0x4B << 1) // A0 = SCL, A1 = SDA+ K; O. e" Y2 A" V# o0 B$ i# ^. A
#define INA219_I2C_ADDRESS_CONF_C (u8)(0x4C << 1) // A0 = GND, A1 = SCL
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#define INA219_I2C_ADDRESS_CONF_D (u8)(0x4D << 1) // A0 = VS+, A1 = SCL$ o) {0 h9 ]- {# t1 x+ k
#define INA219_I2C_ADDRESS_CONF_E (u8)(0x4E << 1) // A0 = SDA, A1 = SCL
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#define INA219_I2C_ADDRESS_CONF_F (u8)(0x4F << 1) // A0 = SCL, A1 = SCL
$ k+ G$ H/ @* d8 J' W) b. A0 r
#define INA219_I2C_ADDRESS INA219_I2C_ADDRESS_CONF_0% n+ g0 Y: Q. l; x" {
$ ^ g* e4 ^; D% W6 ^ D0 o* v
$ |* \! }% V8 s& _2 Q
/*----------------------------------------------------------------------------*/
9 S/ {$ R2 @$ F# p) f+ O
// Register Addresses! b9 e1 {$ ^5 L1 E
#define INA219_REG_CONFIG (u8)(0x00) // CONFIG REGISTER (R/W)' ~9 l3 I/ E9 D2 }* ~2 `
#define INA219_REG_SHUNTVOLTAGE (u8)(0x01) // SHUNT VOLTAGE REGISTER (R)
/ S9 G8 x7 y- k& r
#define INA219_REG_BUSVOLTAGE (u8)(0x02) // BUS VOLTAGE REGISTER (R)* m: h* L) X6 e/ u, o8 O& G
#define INA219_REG_POWER (u8)(0x03) // POWER REGISTER (R)
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#define INA219_REG_CURRENT (u8)(0x04) // CURRENT REGISTER (R)
. O: D& ^& F2 T4 T W8 R/ P
#define INA219_REG_CALIBRATION (u8)(0x05) // CALIBRATION REGISTER (R/W), [, v" y6 G: ?4 k$ p2 W
1 F2 ?% k7 z, M0 d
% G9 J. H) v+ r" E* L) `
/*----------------------------------------------------------------------------*/3 H4 Y) D- c7 N4 W- m) k, ?0 p
// Macros for assigning config bits
# w- V4 G4 Y, q% B3 v
#define INA219_CFGB_RESET(x) (u16)((x & 0x01) << 15) // Reset Bit: U: u$ {, u7 K/ e, R* l9 Q7 U
#define INA219_CFGB_BUSV_RANGE(x) (u16)((x & 0x01) << 13) // Bus Voltage Range
9 h& g+ y7 v; ]$ ?$ H
#define INA219_CFGB_PGA_RANGE(x) (u16)((x & 0x03) << 11) // Shunt Voltage Range
- p6 M) R5 Z' G2 v% e: |6 N0 o8 v2 i
#define INA219_CFGB_BADC_RES_AVG(x) (u16)((x & 0x0F) << 7) // Bus ADC Resolution/Averaging
3 H+ J; @8 }0 [: E) g
#define INA219_CFGB_SADC_RES_AVG(x) (u16)((x & 0x0F) << 3) // Shunt ADC Resolution/Averaging
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#define INA219_CFGB_MODE(x) (u16) (x & 0x07) // Operating Mode
' u8 m( B; g' e6 X
* {* ]0 m9 W! S8 J% c2 C) C
& [+ K! c, Y* U6 Y9 r A
/*----------------------------------------------------------------------------*// n+ i _+ T b" x/ L) H
// Configuration Register* W* B. g3 X. @1 c# w
#define INA219_CFG_RESET INA219_CFGB_RESET(1) // Reset Bit& C- i4 ?6 v8 W$ h7 u' B; I
6 x1 j' M' f4 _8 {% r
#define INA219_CFG_BVOLT_RANGE_MASK INA219_CFGB_BUSV_RANGE(1) // Bus Voltage Range Mask
" C* b8 i! r0 L
#define INA219_CFG_BVOLT_RANGE_16V INA219_CFGB_BUSV_RANGE(0) // 0-16V Range! Z3 d2 r3 n3 |! c1 ]7 J
#define INA219_CFG_BVOLT_RANGE_32V INA219_CFGB_BUSV_RANGE(1) // 0-32V Range (default)
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" F2 R" V# Y& A/ Y: ^$ b* ~8 A
#define INA219_CFG_SVOLT_RANGE_MASK INA219_CFGB_PGA_RANGE(3) // Shunt Voltage Range Mask! s6 Z+ V- X3 @, y5 ^) K% \% X
#define INA219_CFG_SVOLT_RANGE_40MV INA219_CFGB_PGA_RANGE(0) // Gain 1, 40mV Range
4 |8 C9 G# _, F2 v2 d
#define INA219_CFG_SVOLT_RANGE_80MV INA219_CFGB_PGA_RANGE(1) // Gain 2, 80mV Range
$ J u6 W1 t1 ]
#define INA219_CFG_SVOLT_RANGE_160MV INA219_CFGB_PGA_RANGE(2) // Gain 4, 160mV Range
5 _/ k+ H( Y. y
#define INA219_CFG_SVOLT_RANGE_320MV INA219_CFGB_PGA_RANGE(3) // Gain 8, 320mV Range (default)
. k# x& C6 I( l9 I$ k: R7 S$ j
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#define INA219_CFG_BADCRES_MASK INA219_CFGB_BADC_RES_AVG(15) // Bus ADC Resolution and Averaging Mask
! |3 T2 i0 A3 L8 {* D- M+ p
#define INA219_CFG_BADCRES_9BIT_1S_84US INA219_CFGB_BADC_RES_AVG(0) // 1 x 9-bit Bus sample
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#define INA219_CFG_BADCRES_10BIT_1S_148US INA219_CFGB_BADC_RES_AVG(1) // 1 x 10-bit Bus sample! R" E+ T6 A/ ^6 Q6 _
#define INA219_CFG_BADCRES_11BIT_1S_276US INA219_CFGB_BADC_RES_AVG(2) // 1 x 11-bit Bus sample
u$ N! v7 h% i5 T; f" H
#define INA219_CFG_BADCRES_12BIT_1S_532US INA219_CFGB_BADC_RES_AVG(3) // 1 x 12-bit Bus sample (default)
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#define INA219_CFG_BADCRES_12BIT_2S_1MS INA219_CFGB_BADC_RES_AVG(9) // 2 x 12-bit Bus samples averaged together' b' J. g6 ?; ]& C7 k0 w+ P1 r+ J4 P
#define INA219_CFG_BADCRES_12BIT_4S_2MS INA219_CFGB_BADC_RES_AVG(10) // 4 x 12-bit Bus samples averaged together Y7 S% b. c) T5 Q' \
#define INA219_CFG_BADCRES_12BIT_8S_4MS INA219_CFGB_BADC_RES_AVG(11) // 8 x 12-bit Bus samples averaged together3 d+ V- P/ D1 J/ E! I
#define INA219_CFG_BADCRES_12BIT_16S_8MS INA219_CFGB_BADC_RES_AVG(12) // 16 x 12-bit Bus samples averaged together7 t# p) }- _" k! l% ]" L# n# b% |
#define INA219_CFG_BADCRES_12BIT_32S_17MS INA219_CFGB_BADC_RES_AVG(13) // 32 x 12-bit Bus samples averaged together6 t# Q2 N/ Z' d% ~
#define INA219_CFG_BADCRES_12BIT_64S_34MS INA219_CFGB_BADC_RES_AVG(14) // 64 x 12-bit Bus samples averaged together
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#define INA219_CFG_BADCRES_12BIT_128S_68MS INA219_CFGB_BADC_RES_AVG(15) // 128 x 12-bit Bus samples averaged together
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#define INA219_CFG_SADCRES_MASK INA219_CFGB_SADC_RES_AVG(15) // Shunt ADC Resolution and Averaging Mask
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#define INA219_CFG_SADCRES_9BIT_1S_84US INA219_CFGB_SADC_RES_AVG(0) // 1 x 9-bit Shunt sample- ^: G# [0 `' w0 D1 J$ _
#define INA219_CFG_SADCRES_10BIT_1S_148US INA219_CFGB_SADC_RES_AVG(1) // 1 x 10-bit Shunt sample
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#define INA219_CFG_SADCRES_11BIT_1S_276US INA219_CFGB_SADC_RES_AVG(2) // 1 x 11-bit Shunt sample( @3 T, D$ k/ J6 l9 h# e& ]# J
#define INA219_CFG_SADCRES_12BIT_1S_532US INA219_CFGB_SADC_RES_AVG(3) // 1 x 12-bit Shunt sample (default)" O3 |3 `' [& ?; ^6 Q* [) ]) G
#define INA219_CFG_SADCRES_12BIT_2S_1MS INA219_CFGB_SADC_RES_AVG(9) // 2 x 12-bit Shunt samples averaged together
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#define INA219_CFG_SADCRES_12BIT_4S_2MS INA219_CFGB_SADC_RES_AVG(10) // 4 x 12-bit Shunt samples averaged together
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#define INA219_CFG_SADCRES_12BIT_8S_4MS INA219_CFGB_SADC_RES_AVG(11) // 8 x 12-bit Shunt samples averaged together. \ l( K4 f: e' Q5 k* ~
#define INA219_CFG_SADCRES_12BIT_16S_8MS INA219_CFGB_SADC_RES_AVG(12) // 16 x 12-bit Shunt samples averaged together- h9 H; {, H+ G
#define INA219_CFG_SADCRES_12BIT_32S_17MS INA219_CFGB_SADC_RES_AVG(13) // 32 x 12-bit Shunt samples averaged together* r" j* b/ H1 ~6 f3 _
#define INA219_CFG_SADCRES_12BIT_64S_34MS INA219_CFGB_SADC_RES_AVG(14) // 64 x 12-bit Shunt samples averaged together
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#define INA219_CFG_SADCRES_12BIT_128S_68MS INA219_CFGB_SADC_RES_AVG(15) // 128 x 12-bit Shunt samples averaged together6 Q9 R z3 y4 i" \. a% T3 n F
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#define INA219_CFG_MODE_MASK INA219_CFGB_MODE(7) // Operating Mode Mask! J' D; J3 _0 w% B; r5 N
#define INA219_CFG_MODE_POWERDOWN INA219_CFGB_MODE(0) // Power-Down; [8 k0 ^" k6 |4 j3 \$ z* f2 n
#define INA219_CFG_MODE_SVOLT_TRIGGERED INA219_CFGB_MODE(1) // Shunt Voltage, Triggered& ` N# k# Y/ O* _* j/ f
#define INA219_CFG_MODE_BVOLT_TRIGGERED INA219_CFGB_MODE(2) // Bus Voltage, Triggered
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#define INA219_CFG_MODE_SANDBVOLT_TRIGGERED INA219_CFGB_MODE(3) // Shunt and Bus, Triggered
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#define INA219_CFG_MODE_ADCOFF INA219_CFGB_MODE(4) // ADC Off (disabled)
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#define INA219_CFG_MODE_SVOLT_CONTINUOUS INA219_CFGB_MODE(5) // Shunt Voltage, Continuous' f6 o. y9 j' }
#define INA219_CFG_MODE_BVOLT_CONTINUOUS INA219_CFGB_MODE(6) // Bus Voltage, Continuous
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#define INA219_CFG_MODE_SANDBVOLT_CONTINUOUS INA219_CFGB_MODE(7) // Shunt and Bus, Continuous (default)
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/*----------------------------------------------------------------------------*/# C7 u0 R/ \$ O9 r
// Bus Voltage Register
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#define INA219_BVOLT_CNVR (u16)(0x0002) // Conversion Ready2 G" R+ S U, b) g
#define INA219_BVOLT_OVF (u16)(0x0001) // Math Overflow Flag
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typedef struct P7 b* a4 j3 {+ d" ^1 [) j5 x; R$ f. x
{
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signed short voltage_ina219;
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signed long shunt_ina219;! R7 d/ b1 ^! I" E% Y( w E/ W
signed long current_ina219;
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signed long power_ina219;
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}INA219_DATA;7 y0 }! r/ J1 a$ R4 ?4 Q2 F1 |
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extern u8 ina219_busVolt_LSB_mV;, Z3 C4 S2 @5 ?" ?6 U% e+ |3 t5 M
extern u8 ina219_shuntVolt_LSB_uV;
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extern unsigned short ina219_calValue;
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extern u32 ina219_current_LSB_uA;! a, {, ~3 l# H/ p6 l% |5 `
extern u32 ina219_power_LSB_mW;
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extern void ina219_init(void);% c* F! W$ g! R6 ]
extern void INA_Process(void);- f$ r z8 s/ K! s* _
extern signed short ina219_GetBusVoltage_raw(void);- \. z4 ?6 x: H+ `3 L# j+ E
extern signed short ina219_GetCurrent_raw(void);
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extern signed short ina219_GetBusVoltage_mV(void);
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extern s32 ina219_GetShuntVoltage_uV(void);
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extern s32 ina219_GetCurrent_uA(void);
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extern s32 ina219_GetPower_mW(void);
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#endif