STM32 I2C温度读取TMP117温度传感器

STMCU小助手 · 2023-02-24T15:18:16+00:00

一、硬件原理图 , N# B/ y, |1 @) c, x4 u% H0 p/ s! P$ a5 S' L7 h 3 C; r2 T+ V8 j! _$ h+ F* Z1 Z. _. p* G, ^8 j 就两根数据线SCLSDA读取，ALERT不涉及温度计算 , o9 ^4 ?" z5 o( L/ M0 L) D9 W+ D4 s! {/ Z, ^0 I+ F 9 W% m% l% a1 n0 J, D二、CUBEMXI2C接口配置) y& P \8 I9 t; R * J: [ s) J" J m9 A- j( Q! q4 D! l 7 S$ v. R+ A. H6 O * k. o% y* ]4 M& |6 w n- G & F* ]: [9 i/ k% u4 r . U" q$ s! X: ^* v+ p" z& ]按照对应GPIO口配置- \4 v6 O6 L; A " V7 V: k6 Q& a, G. Y1 ?/ S ) k& C3 g; ?" R4 x9 v 三、代码 2 k3 l* Z; N* v3 U8 o, V, ?( v#define TMP117_Write 0xA0 //写地址 % r% w! c) z3 n2 x* a#define TMP117_Read 0x90 //读地址2 v$ x$ W( m- S7 c6 I* I void temperature_measurement() g5 T; R3 S) |! }( d8 T {: ~' f3 n$ O. s; ~- o1 S. p uint8_t WriteBuffer[BufferSize_tmp],ReadBuffer[BufferSize_tmp]; //读写数组 X" S' I) f6 Y# }) T) T uint8_t temperature_buff[4]; ( j, Q" P, b( s# O+ N V# u int16_t val; * l! @/ r1 t$ y3 a0 X' C* G ' d5 b P7 t8 B HAL_I2C_Mem_Read(&hi2c1, TMP117_Read, 0, I2C_MEMADD_SIZE_8BIT,ReadBuffer,4, 0xff); // 读取I2C数值 " L# J4 W k5 X: q val = ((int16_t)ReadBuffer[0] >8); * [ h# s6 i+ `6 z q temperature_buff[1] = temperature_out;4 R8 N6 d5 H7 `; h; h' J0 ] } & j1 P/ @9 F: A* j: G复制代码- |) Z2 V3 w1 P# `$ I ————————————————# A/ Q7 J+ a) w! ^1 m) K 版权声明：超级馒头神0 ^1 W( e; j7 O/ D' z% D 2 o' d. w' b' \, @% l5 d$ X2 j# ] 9 ?. n& I! s! m

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STMCU小助手发布时间：2023-2-24 23:18

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文章简介:	STM32 I2C温度读取TMP117温度传感器

一、硬件原理图

就两根数据线SCLSDA读取，ALERT不涉及温度计算

9 W% m% l% a1 n0 J, D二、CUBEMXI2C接口配置

按照对应GPIO口配置

三、代码

#define TMP117_Write 0xA0 //写地址
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#define TMP117_Read 0x90 //读地址2 v$ x$ W( m- S7 c6 I* I
void temperature_measurement() g5 T; R3 S) |! }( d8 T
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uint8_t WriteBuffer[BufferSize_tmp],ReadBuffer[BufferSize_tmp]; //读写数组
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uint8_t temperature_buff[4];
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int16_t val;
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HAL_I2C_Mem_Read(&hi2c1, TMP117_Read, 0, I2C_MEMADD_SIZE_8BIT,ReadBuffer,4, 0xff); // 读取I2C数值
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val = ((int16_t)ReadBuffer[0] << 8)| ReadBuffer[1] ; //原始数值6 W6 w0 n8 D6 T# j: n' ^* k8 T
temperature=val * 0.0078125; //比例系数
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temperature_out=temperature*100; //发送温度*100' e% z+ E. F: h' ] g
temperature_buff[0] = (temperature_out>>8);
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temperature_buff[1] = temperature_out;4 R8 N6 d5 H7 `; h; h' J0 ]
}
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