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Made refactoring for multi-sensor ability (N same sensors); check AHT21. I cry: I need this pointer in C!!!

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This commit is contained in:
Edward Emelianov 2025-10-12 01:49:06 +03:00
parent 7f85861d6c
commit b0097d5ee6
10 changed files with 291 additions and 231 deletions
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173
I2Csensors/BMP180.c
View File

@ -19,18 +19,18 @@
#include <stdio.h> #include <stdio.h>
#include <usefull_macros.h> #include <usefull_macros.h>
#include "i2c.h"
#include "BMP180.h" #include "BMP180.h"
#include "i2c.h"
#include "sensors_private.h"
static uint8_t addr = 0x77;
typedef enum{ enum{
BMP180_OVERS_1 = 0, // oversampling is off BMP180_OVERS_1 = 0, // oversampling is off
BMP180_OVERS_2 = 1, BMP180_OVERS_2 = 1,
BMP180_OVERS_4 = 2, BMP180_OVERS_4 = 2,
BMP180_OVERS_8 = 3, BMP180_OVERS_8 = 3,
BMP180_OVERSMAX = 4 BMP180_OVERSMAX = 3
} BMP180_oversampling; };
#define BMP180_CHIP_ID 0x55 #define BMP180_CHIP_ID 0x55
@ -50,6 +50,8 @@ typedef enum{
#define BMP180_CTRLM_OSS_SHIFT (6) #define BMP180_CTRLM_OSS_SHIFT (6)
// start measurement // start measurement
#define BMP180_CTRLM_SCO (1<<5) #define BMP180_CTRLM_SCO (1<<5)
// measurements of P flag
#define BMP180_CTRLM_PRES (1<<4)
// write it to BMP180_REG_SOFTRESET for soft reset // write it to BMP180_REG_SOFTRESET for soft reset
#define BMP180_SOFTRESET_VAL (0xB6) #define BMP180_SOFTRESET_VAL (0xB6)
// start measurement of T/P // start measurement of T/P
@ -64,9 +66,10 @@ typedef enum{
static waitmsr_t wait4 = WAIT_NONE; static waitmsr_t wait4 = WAIT_NONE;
static BMP180_oversampling bmp180_os = BMP180_OVERSMAX; // mind that user can't change this
static const uint8_t bmp180_os = BMP180_OVERSMAX;
static struct { typedef struct {
int16_t AC1; int16_t AC1;
int16_t AC2; int16_t AC2;
int16_t AC3; int16_t AC3;
@ -80,45 +83,35 @@ static struct {
int16_t MD; int16_t MD;
int32_t MCfix; int32_t MCfix;
int32_t AC1_fix; int32_t AC1_fix;
} __attribute__ ((packed)) CaliData = {0}; int32_t Tuncomp; // uncompensated T value
} __attribute__ ((packed)) CaliData_t;
static sensor_status_t bmpstatus = SENS_NOTINIT;
static uint8_t calidata_rdy = 0;
//static uint32_t milliseconds_start = 0; // time of measurement start
//static uint32_t p_delay = 8; // delay for P measurement
static uint8_t uncomp_data[3]; // raw uncompensated data
static int32_t Tval; // uncompensated T value
// compensated values:
static uint32_t Pmeasured; // Pa
static float Tmeasured; // degC
static uint8_t devID = 0;
/* /*
static void BMP180_setOS(BMP180_oversampling os){ static void BMP180_setOS(BMP180_oversampling os){
bmp180_os = os & 0x03; bmp180_os = os & 0x03;
}*/ }*/
// get compensation data, return 1 if OK // get compensation data, return 1 if OK
static int readcompdata(){ static int readcompdata(sensor_t *s){
FNAME(); FNAME();
if(!i2c_read_data8(BMP180_REG_CALIB, sizeof(CaliData), (uint8_t*)&CaliData)) return FALSE; if(!s->privdata){
// convert big-endian into little-endian s->privdata = malloc(sizeof(CaliData_t));
uint8_t *arr = (uint8_t*)&CaliData; DBG("ALLOCA");
for(int i = 0; i < (int)sizeof(CaliData); i+=2){
register uint8_t val = arr[i];
arr[i] = arr[i+1];
arr[i+1] = val;
} }
if(!i2c_read_data8(BMP180_REG_CALIB, sizeof(CaliData_t), (uint8_t*)s->privdata)) return FALSE;
CaliData_t *CaliData = (CaliData_t*)s->privdata;
// convert big-endian into little-endian
uint16_t *arr = (uint16_t*)(s->privdata);
for(int i = 0; i < 11; ++i) arr[i] = __builtin_bswap16(arr[i]);
// prepare for further calculations // prepare for further calculations
CaliData.MCfix = CaliData.MC << 11; CaliData->MCfix = CaliData->MC << 11;
CaliData.AC1_fix = CaliData.AC1 << 2; CaliData->AC1_fix = CaliData->AC1 << 2;
calidata_rdy = 1; s->private = 1; // use private for calibration ready flag
DBG("Calibration rdy"); DBG("Calibration rdy");
return TRUE; return TRUE;
} }
// do a soft-reset procedure // do a soft-reset procedure
static int BMP180_reset(){ static int BMP180_reset(sensor_t _U_ *s){
if(!i2c_write_reg8(BMP180_REG_SOFTRESET, BMP180_SOFTRESET_VAL)){ if(!i2c_write_reg8(BMP180_REG_SOFTRESET, BMP180_SOFTRESET_VAL)){
DBG("Can't reset\n"); DBG("Can't reset\n");
return FALSE; return FALSE;
@ -127,9 +120,10 @@ static int BMP180_reset(){
} }
// read compensation data & write registers // read compensation data & write registers
static int BMP180_init(){ static int BMP180_init(sensor_t *s){
bmpstatus = SENS_NOTINIT ; s->status = SENS_NOTINIT;
if(!BMP180_reset()) return FALSE; if(!BMP180_reset(s)) return FALSE;
uint8_t devID;
if(!i2c_read_reg8(BMP180_REG_ID, &devID)){ if(!i2c_read_reg8(BMP180_REG_ID, &devID)){
DBG("Can't read BMP180_REG_ID"); DBG("Can't read BMP180_REG_ID");
return FALSE; return FALSE;
@ -139,50 +133,54 @@ static int BMP180_init(){
DBG("Not BMP180\n"); DBG("Not BMP180\n");
return FALSE; return FALSE;
} }
if(!readcompdata()){ if(!readcompdata(s)){
DBG("Can't read calibration data\n"); DBG("Can't read calibration data\n");
return FALSE; return FALSE;
}else{ }else{
DBG("AC1=%d, AC2=%d, AC3=%d, AC4=%u, AC5=%u, AC6=%u", CaliData.AC1, CaliData.AC2, CaliData.AC3, CaliData.AC4, CaliData.AC5, CaliData.AC6); #ifdef EBUG
DBG("B1=%d, B2=%d", CaliData.B1, CaliData.B2); CaliData_t *CaliData = (CaliData_t*)s->privdata;
DBG("MB=%d, MC=%d, MD=%d", CaliData.MB, CaliData.MC, CaliData.MD); #endif
DBG("AC1=%d, AC2=%d, AC3=%d, AC4=%u, AC5=%u, AC6=%u", CaliData->AC1, CaliData->AC2, CaliData->AC3, CaliData->AC4, CaliData->AC5, CaliData->AC6);
DBG("B1=%d, B2=%d", CaliData->B1, CaliData->B2);
DBG("MB=%d, MC=%d, MD=%d", CaliData->MB, CaliData->MC, CaliData->MD);
} }
bmpstatus = SENS_RELAX; s->status = SENS_RELAX;
return TRUE; return TRUE;
} }
// start measurement, @return 1 if all OK // start measurement, @return 1 if all OK
static int BMP180_start(){ static int BMP180_start(sensor_t *s){
if(!calidata_rdy || bmpstatus == SENS_BUSY) return FALSE; if(!s->privdata || s->status == SENS_BUSY) return FALSE;
uint8_t reg = BMP180_READ_T | BMP180_CTRLM_SCO; uint8_t reg = BMP180_READ_T | BMP180_CTRLM_SCO;
if(!i2c_write_reg8(BMP180_REG_CTRLMEAS, reg)){ if(!i2c_write_reg8(BMP180_REG_CTRLMEAS, reg)){
bmpstatus = SENS_ERR; s->status = SENS_ERR;
DBG("Can't write CTRL reg\n"); DBG("Can't write CTRL reg\n");
return FALSE; return FALSE;
} }
bmpstatus = SENS_BUSY; s->status = SENS_BUSY;
wait4 = WAIT_T; wait4 = WAIT_T;
return TRUE; return TRUE;
} }
// calculate T degC and P in Pa // calculate T degC and P in Pa
static inline void compens(uint32_t Pval){ static inline void compens(sensor_t *s, uint32_t Pval){
CaliData_t *CaliData = (CaliData_t*)s->privdata;
// T: // T:
int32_t X1 = ((Tval - CaliData.AC6)*CaliData.AC5) >> 15; int32_t X1 = ((CaliData->Tuncomp - CaliData->AC6)*CaliData->AC5) >> 15;
int32_t X2 = CaliData.MCfix / (X1 + CaliData.MD); int32_t X2 = CaliData->MCfix / (X1 + CaliData->MD);
int32_t B5 = X1 + X2; int32_t B5 = X1 + X2;
Tmeasured = (B5 + 8.) / 160.; s->data.T = (B5 + 8.) / 160.;
// P: // P:
int32_t B6 = B5 - 4000; int32_t B6 = B5 - 4000;
X1 = (CaliData.B2 * ((B6*B6) >> 12)) >> 11; X1 = (CaliData->B2 * ((B6*B6) >> 12)) >> 11;
X2 = (CaliData.AC2 * B6) >> 11; X2 = (CaliData->AC2 * B6) >> 11;
int32_t X3 = X1 + X2; int32_t X3 = X1 + X2;
int32_t B3 = (((CaliData.AC1_fix + X3) << bmp180_os) + 2) >> 2; int32_t B3 = (((CaliData->AC1_fix + X3) << bmp180_os) + 2) >> 2;
X1 = (CaliData.AC3 * B6) >> 13; X1 = (CaliData->AC3 * B6) >> 13;
X2 = (CaliData.B1 * ((B6 * B6) >> 12)) >> 16; X2 = (CaliData->B1 * ((B6 * B6) >> 12)) >> 16;
X3 = ((X1 + X2) + 2) >> 2; X3 = ((X1 + X2) + 2) >> 2;
uint32_t B4 = (CaliData.AC4 * (uint32_t) (X3 + 32768)) >> 15; uint32_t B4 = (CaliData->AC4 * (uint32_t) (X3 + 32768)) >> 15;
uint32_t B7 = (uint32_t)((int32_t)Pval - B3) * (50000 >> bmp180_os); uint32_t B7 = (uint32_t)((int32_t)Pval - B3) * (50000 >> bmp180_os);
int32_t p = 0; int32_t p = 0;
if(B7 < 0x80000000){ if(B7 < 0x80000000){
@ -194,86 +192,65 @@ static inline void compens(uint32_t Pval){
X1 *= X1; X1 *= X1;
X1 = (X1 * 3038) >> 16; X1 = (X1 * 3038) >> 16;
X2 = (-7357 * p) / 65536; X2 = (-7357 * p) / 65536;
Pmeasured = p + ((X1 + X2 + 3791) / 16); s->data.P = (p + ((X1 + X2 + 3791) / 16)) / 100.; // convert to hPa
} }
static int still_measuring(){ static sensor_status_t BMP180_process(sensor_t *s){
uint8_t reg; uint8_t reg, stat;
if(!i2c_read_reg8(BMP180_REG_CTRLMEAS, &reg)) return TRUE; uint8_t uncomp_data[3];
if(reg & BMP180_CTRLM_SCO){ CaliData_t *CaliData = (CaliData_t*)s->privdata;
return TRUE; if(s->status != SENS_BUSY) goto ret;
} if(!i2c_read_reg8(BMP180_REG_CTRLMEAS, &stat)){ s->status = SENS_ERR; goto ret; }
return FALSE; DBG("stat=0x%02X", stat);
} if(stat & BMP180_CTRLM_SCO) goto ret; // still measure
if((stat & BMP180_CTRLM_PRES) == 0){ // wait for temperature
static sensor_status_t BMP180_process(){
uint8_t reg;
if(bmpstatus != SENS_BUSY) goto ret;
if(wait4 == WAIT_T){ // wait for temperature
if(still_measuring()) goto ret;
// get uncompensated data // get uncompensated data
DBG("Read uncompensated T\n"); DBG("Read uncompensated T\n");
if(!i2c_read_data8(BMP180_REG_OUT, 2, uncomp_data)){ if(!i2c_read_data8(BMP180_REG_OUT, 2, uncomp_data)){
bmpstatus = SENS_ERR; s->status = SENS_ERR;
goto ret; goto ret;
} }
Tval = uncomp_data[0] << 8 | uncomp_data[1]; CaliData->Tuncomp = uncomp_data[0] << 8 | uncomp_data[1];
DBG("Start P measuring\n"); DBG("Tuncomp=%d, Start P measuring\n", CaliData->Tuncomp);
reg = BMP180_READ_P | BMP180_CTRLM_SCO | (bmp180_os << BMP180_CTRLM_OSS_SHIFT); reg = BMP180_READ_P | BMP180_CTRLM_SCO | (bmp180_os << BMP180_CTRLM_OSS_SHIFT);
if(!i2c_write_reg8(BMP180_REG_CTRLMEAS, reg)){ if(!i2c_write_reg8(BMP180_REG_CTRLMEAS, reg)){
bmpstatus = SENS_ERR; s->status = SENS_ERR;
goto ret; goto ret;
} }
wait4 = WAIT_P;
}else{ // wait for pressure }else{ // wait for pressure
if(still_measuring()) goto ret;
DBG("Read uncompensated P\n"); DBG("Read uncompensated P\n");
if(!i2c_read_data8(BMP180_REG_OUT, 3, uncomp_data)){ if(!i2c_read_data8(BMP180_REG_OUT, 3, uncomp_data)){
bmpstatus = SENS_ERR; s->status = SENS_ERR;
goto ret; goto ret;
} }
uint32_t Pval = uncomp_data[0] << 16 | uncomp_data[1] << 8 | uncomp_data[2]; uint32_t Pval = uncomp_data[0] << 16 | uncomp_data[1] << 8 | uncomp_data[2];
Pval >>= (8 - bmp180_os); Pval >>= (8 - bmp180_os);
DBG("Puncomp=%d", Pval);
// calculate compensated values // calculate compensated values
compens(Pval); compens(s, Pval);
DBG("All data ready\n"); DBG("All data ready\n");
bmpstatus = SENS_RDY; // data ready s->status = SENS_RDY; // data ready
wait4 = WAIT_NONE;
} }
ret: ret:
return bmpstatus; return s->status;
} }
// read data & convert it static sensor_props_t BMP180_props(sensor_t _U_ *s){
static int BMP180_getdata(sensor_data_t *d){
if(!d || bmpstatus != SENS_RDY) return FALSE;
d->T = Tmeasured;
d->P = Pmeasured / 100.; // convert Pa to hPa
bmpstatus = SENS_RELAX;
return TRUE;
}
static sensor_props_t BMP180_props(){
sensor_props_t p = {.T = 1, .P = 1}; sensor_props_t p = {.T = 1, .P = 1};
return p; return p;
} }
static uint8_t address(uint8_t new){ static int s_heater(sensor_t _U_ *s, int _U_ on){
if(new) addr = new;
return addr;
}
static int s_heater(int _U_ on){
return FALSE; return FALSE;
} }
sensor_t BMP180 = { sensor_t BMP180 = {
.name = "BMP180", .name = "BMP180",
.address = address, .address = 0x77,
.status = SENS_NOTINIT,
.init = BMP180_init, .init = BMP180_init,
.start = BMP180_start, .start = BMP180_start,
.heater = s_heater, .heater = s_heater,
.process = BMP180_process, .process = BMP180_process,
.properties = BMP180_props, .properties = BMP180_props,
.get_data = BMP180_getdata
}; };

83
I2Csensors/SI7005.c
View File

@ -19,12 +19,9 @@
#include <usefull_macros.h> #include <usefull_macros.h>
#include "i2c.h" #include "i2c.h"
#include "sensors_private.h"
#include "SI7005.h" #include "SI7005.h"
static uint8_t addr = 0x40;
static double Tmeasured, Hmeasured;
static sensor_status_t status = SENS_NOTINIT;
#define SI7005_REGSTATUS 0 #define SI7005_REGSTATUS 0
#define SI7005_STATUSNRDY 1 #define SI7005_STATUSNRDY 1
#define SI7005_REGDATA 1 #define SI7005_REGDATA 1
@ -37,9 +34,9 @@ static sensor_status_t status = SENS_NOTINIT;
#define SI7005_ID 0x50 #define SI7005_ID 0x50
static int s_init(){ static int s_init(sensor_t *s){
uint8_t ID; uint8_t ID;
status = SENS_NOTINIT; s->status = SENS_NOTINIT;
if(!i2c_read_reg8(SI7005_REGID, &ID)){ if(!i2c_read_reg8(SI7005_REGID, &ID)){
DBG("Can't read SI_REG_ID"); DBG("Can't read SI_REG_ID");
return FALSE; return FALSE;
@ -49,16 +46,16 @@ static int s_init(){
DBG("Not SI7005\n"); DBG("Not SI7005\n");
return FALSE; return FALSE;
} }
status = SENS_RELAX; s->status = SENS_RELAX;
return TRUE; return TRUE;
} }
static int s_start(){ static int s_start(sensor_t *s){
if(status != SENS_RELAX) return FALSE; if(s->status != SENS_RELAX) return FALSE;
status = SENS_BUSY; s->status = SENS_BUSY;
if(!i2c_write_reg8(SI7005_REGCONFIG, SI7005_CONFTEMP | SI7005_CONFSTART)){ if(!i2c_write_reg8(SI7005_REGCONFIG, SI7005_CONFTEMP | SI7005_CONFSTART)){
DBG("Can't write start Tmeas"); DBG("Can't write start Tmeas");
status = SENS_ERR; s->status = SENS_ERR;
return FALSE; return FALSE;
} }
DBG("Wait for T\n"); DBG("Wait for T\n");
@ -66,64 +63,57 @@ static int s_start(){
} }
// start humidity measurement // start humidity measurement
static sensor_status_t si7005_cmdH(){ static sensor_status_t si7005_cmdH(sensor_t *s){
status = SENS_BUSY; s->status = SENS_BUSY;
if(!i2c_write_reg8(SI7005_REGCONFIG, SI7005_CONFSTART)){ if(!i2c_write_reg8(SI7005_REGCONFIG, SI7005_CONFSTART)){
DBG("Can't write start Hmeas"); DBG("Can't write start Hmeas");
return (status = SENS_ERR); return (s->status = SENS_ERR);
} }
DBG("Wait for H"); DBG("Wait for H");
return status; return s->status;
} }
static sensor_status_t s_process(){ static sensor_status_t s_process(sensor_t *s){
uint8_t c, d[3]; uint8_t c, d[3];
if(status != SENS_BUSY) return status; if(s->status != SENS_BUSY) return s->status;
if(!i2c_read_raw(d, 3)){ if(!i2c_read_raw(d, 3)){
DBG("Can't read status"); DBG("Can't read status");
return (status = SENS_ERR); return (s->status = SENS_ERR);
} }
//DBG("Status: 0x%02x, H: 0x%02x, L: 0x%02x", d[0], d[1], d[2]); //DBG("Status: 0x%02x, H: 0x%02x, L: 0x%02x", d[0], d[1], d[2]);
if(!i2c_read_reg8(SI7005_REGCONFIG, &c)){ if(!i2c_read_reg8(SI7005_REGCONFIG, &c)){
DBG("Can't read config"); DBG("Can't read config");
return (status = SENS_ERR); return (s->status = SENS_ERR);
} }
//DBG("Config: 0x%02x", c); //DBG("Config: 0x%02x", c);
if(d[0] & SI7005_STATUSNRDY){ // not ready yet if(d[0] & SI7005_STATUSNRDY){ // not ready yet
return status; return s->status;
} }
uint16_t TH = (uint16_t)((d[1]<<8) | d[2]); uint16_t TH = (uint16_t)((d[1]<<8) | d[2]);
if(c & SI7005_CONFTEMP){ // temperature measured if(c & SI7005_CONFTEMP){ // temperature measured
TH >>= 2; TH >>= 2;
Tmeasured = TH/32. - 50.; double Tmeasured = TH/32. - 50.;
DBG("T=%.2f", Tmeasured); DBG("T=%.2f", Tmeasured);
return si7005_cmdH(); s->data.T = Tmeasured;
return si7005_cmdH(s);
}else{ // humidity measured }else{ // humidity measured
TH >>= 4; // correct T/H
Hmeasured = TH/16.f - 24.f;
DBG("H=%.1f", Hmeasured);
status = SENS_RDY;
}
return status;
}
static int s_getdata(sensor_data_t *d){
if(!d || status != SENS_RDY) return FALSE;
DBG("Measured T=%.1f, H=%.1f", Tmeasured, Hmeasured);
// correct T/H
#define A0 (-4.7844) #define A0 (-4.7844)
#define A1 (0.4008) #define A1 (0.4008)
#define A2 (-0.00393) #define A2 (-0.00393)
d->H = Hmeasured - (A2*Hmeasured*Hmeasured + A1*Hmeasured + A0); TH >>= 4;
d->T = Tmeasured; double Hmeasured = TH/16.f - 24.f;
status = SENS_RELAX; DBG("H=%.1f", Hmeasured);
return TRUE; s->data.H = Hmeasured - (A2*Hmeasured*Hmeasured + A1*Hmeasured + A0);
s->status = SENS_RDY;
}
return s->status;
} }
// turn heater on/off (1/0) // turn heater on/off (1/0)
static int s_heater(int on){ static int s_heater(sensor_t *s, int on){
DBG("status=%d", status); DBG("status=%d", s->status);
if(status != SENS_RELAX) return FALSE; if(s->status != SENS_RELAX) return FALSE;
uint8_t reg = (on) ? SI7005_CONFHEAT : 0; uint8_t reg = (on) ? SI7005_CONFHEAT : 0;
if(!i2c_write_reg8(SI7005_REGCONFIG, reg)){ if(!i2c_write_reg8(SI7005_REGCONFIG, reg)){
DBG("Can't write regconfig"); DBG("Can't write regconfig");
@ -132,23 +122,18 @@ static int s_heater(int on){
return TRUE; return TRUE;
} }
static sensor_props_t s_props(){ static sensor_props_t s_props(sensor_t _U_ *s){
sensor_props_t p = {.T = 1, .H = 1, .htr = 1}; sensor_props_t p = {.T = 1, .H = 1, .htr = 1};
return p; return p;
} }
static uint8_t address(uint8_t new){
if(new) addr = new;
return addr;
}
sensor_t SI7005 = { sensor_t SI7005 = {
.name = "SI7005", .name = "SI7005",
.address = address, .address = 0x40,
.status = SENS_NOTINIT,
.init = s_init, .init = s_init,
.start = s_start, .start = s_start,
.heater = s_heater, .heater = s_heater,
.process = s_process, .process = s_process,
.properties = s_props, .properties = s_props,
.get_data = s_getdata
}; };

128
I2Csensors/aht.c
View File

@ -20,42 +20,58 @@
#include "aht.h" #include "aht.h"
#include "i2c.h" #include "i2c.h"
#include "sensors_private.h"
static uint8_t addr = 0x38;
static sensor_status_t status = SENS_NOTINIT;
enum{ enum{
ISAHT10, ISAHT1x,
ISAHT15, ISAHT2x
ISAHT21b
}; };
static uint32_t rawH = 0, rawT = 0; #define AHT_CMD_INITIALIZE 0xE1
#define AHT_CMD_MEASURE 0xAC
#define AHT_CMD_SOFT_RESET 0xBA
// status - for AHT21
#define AHT_CMD_STATUS 0x71
// init command bits:
// normal/cycle/command modes (bits 6:5) [non-documented!]:
#define AHT_INIT_NORMAL_MODE 0x00
#define AHT_INIT_CYCLE_MODE 0x20
#define AHT_INIT_CMD_MODE 0x40
// run calibration
#define AHT_INIT_CAL_ON 0x08
// zero byte for INIT/START cmd
#define AHT_NOP 0
// measurement control [non-documented!]
#define AHT_MEAS_CTRL 0x33
// status bits
#define AHT_STATUS_BUSY 0x80
#define AHT_STATUS_NORMAL_MODE 0x00
#define AHT_STATUS_CYCLE_MODE 0x20
#define AHT_STATUS_CMD_MODE 0x40
#define AHT_STATUS_CAL_ON 0x08
// status bits for AHT2x (both should be ones, or init again)
#define AHT_STATUS_CHK 0x18
#define AHT_CMD_INITIALIZE 0xE1
#define AHT_CMD_MEASURE 0xAC
#define AHT_CMD_SOFT_RESET 0xBA
// max reset time // max reset time
#define RST_TIME (20e-3) #define RST_TIME (20e-3)
// max data waiting time // max data waiting time
#define DATA_TIME (75e-3) #define DATA_TIME (75e-3)
static sensor_status_t s_poll(){ static sensor_status_t s_poll(){
uint8_t b; uint8_t b;
if(!i2c_read_raw(&b, 1)) return SENS_ERR; if(!i2c_read_raw(&b, 1)) return SENS_ERR;
#ifdef EBUG #ifdef EBUG
if(b & 0x80) printf("BUSY "); if(b & AHT_STATUS_BUSY) printf("BUSY ");
static const char *modes[] = {"NOR", "CYC", "CMD", "CMD"}; static const char *modes[] = {"NOR", "CYC", "CMD", "CMD"};
printf("MODE=%s ", modes[(b >> 6)&3]); printf("MODE=%s ", modes[(b >> 6)&3]);
printf("%sCALIBRATED\n", b & 8 ? "" : "NOT "); printf("%sCALIBRATED\n", b & AHT_STATUS_CAL_ON ? "" : "NOT ");
#endif #endif
if(b & 0x80) return SENS_BUSY; if(b & AHT_STATUS_BUSY) return SENS_BUSY;
return SENS_RELAX; return SENS_RELAX;
} }
static int s_init(){ static int s_init(sensor_t *s){
status = SENS_NOTINIT; s->status = SENS_NOTINIT;
if(!i2c_write_reg8(AHT_CMD_SOFT_RESET, 0)){ if(!i2c_write_reg8(AHT_CMD_SOFT_RESET, 0)){
DBG("Can't reset"); DBG("Can't reset");
return FALSE; return FALSE;
@ -67,7 +83,7 @@ static int s_init(){
} }
if(t - t0 > RST_TIME) return SENS_ERR; if(t - t0 > RST_TIME) return SENS_ERR;
DBG("Reseted"); DBG("Reseted");
uint8_t data[3] = {AHT_CMD_INITIALIZE, 0x08, 0}; uint8_t data[3] = {AHT_CMD_INITIALIZE, AHT_INIT_CAL_ON, AHT_NOP};
if(!i2c_write_raw(data, 3)){ if(!i2c_write_raw(data, 3)){
DBG("Can't init"); DBG("Can't init");
return FALSE; return FALSE;
@ -79,13 +95,22 @@ static int s_init(){
} }
if(t - t0 > RST_TIME) return SENS_ERR; if(t - t0 > RST_TIME) return SENS_ERR;
DBG("Inited"); DBG("Inited");
status = SENS_RELAX; s->status = SENS_RELAX;
return TRUE; return TRUE;
} }
static int s_start(){ static int s_start(sensor_t *s){
if(status != SENS_RELAX) return FALSE; if(s->status != SENS_RELAX) return FALSE;
uint8_t data[3] = {AHT_CMD_MEASURE, 0x33, 0}; uint8_t data[3] = {AHT_CMD_MEASURE, AHT_MEAS_CTRL, AHT_NOP};
// the only difference between AHT1x and AHT2x
if(s->private == ISAHT2x){ // check status
uint8_t b;
if(!i2c_read_reg8(AHT_CMD_STATUS, &b)) return FALSE;
if((b & AHT_STATUS_CHK) != AHT_STATUS_CHK){
DBG("need init");
if(!s->init(s)) return FALSE;
}
}
if(!i2c_write_raw(data, 3)){ if(!i2c_write_raw(data, 3)){
DBG("Can't start measuring"); DBG("Can't start measuring");
return FALSE; return FALSE;
@ -94,60 +119,61 @@ static int s_start(){
return TRUE; return TRUE;
} }
static sensor_status_t s_process(){ static sensor_status_t s_process(sensor_t *s){
sensor_status_t s = s_poll(); sensor_status_t st = s_poll();
if(s != SENS_RELAX) return (status = s); if(st != SENS_RELAX) return (s->status = st);
uint8_t data[6]; uint8_t data[6];
if(!i2c_read_raw(data, 6)) return (status = SENS_ERR); if(!i2c_read_raw(data, 6)) return (s->status = SENS_ERR);
DBG("Got @ %.3f", sl_dtime()); DBG("Got @ %.3f", sl_dtime());
rawH = ((uint32_t)data[1] << 12) | ((uint32_t)data[2] << 4) | (data[3] >> 4); uint32_t rawH = ((uint32_t)data[1] << 12) | ((uint32_t)data[2] << 4) | (data[3] >> 4);
rawT = ((uint32_t)(data[3] & 0x0F) << 16) | ((uint32_t)data[4] << 8) | data[5]; uint32_t rawT = ((uint32_t)(data[3] & 0x0F) << 16) | ((uint32_t)data[4] << 8) | data[5];
DBG("rawH=%d, rawT=%d", rawH, rawT); DBG("rawH=%d, rawT=%d", rawH, rawT);
return (status = SENS_RDY); s->data.T = rawT * 200.0 / 1048576.0 - 50.0;
s->data.H = rawH * 100.0 / 1048576.0;
return (s->status = SENS_RDY);
} }
static int s_getdata(sensor_data_t *d){ static sensor_props_t s_props(sensor_t _U_ *s){
if(!d || status != SENS_RDY) return FALSE;
d->T = rawT * 200.0 / 1048576.0 - 50.0;
d->H = rawH * 100.0 / 1048576.0;
status = SENS_RELAX;
return TRUE;
}
static sensor_props_t s_props(){
sensor_props_t p = {.T = 1, .H = 1}; sensor_props_t p = {.T = 1, .H = 1};
return p; return p;
} }
static uint8_t address(uint8_t new){ static int s_heater(sensor_t _U_ *s, int _U_ on){
if(new) addr = new;
return addr;
}
static int s_heater(int _U_ on){
return FALSE; return FALSE;
} }
sensor_t AHT10 = { sensor_t AHT10 = {
.name = "AHT10", .name = "AHT10",
.private = ISAHT10, .private = ISAHT1x,
.address = address, .address = 0x38,
.status = SENS_NOTINIT,
.init = s_init, .init = s_init,
.start = s_start, .start = s_start,
.heater = s_heater, .heater = s_heater,
.process = s_process, .process = s_process,
.properties = s_props, .properties = s_props,
.get_data = s_getdata
}; };
sensor_t AHT15 = { sensor_t AHT15 = {
.name = "AHT15", .name = "AHT15",
.private = ISAHT15, .private = ISAHT1x,
.address = address, .address = 0x38,
.status = SENS_NOTINIT,
.init = s_init,
.start = s_start,
.heater = s_heater,
.process = s_process,
.properties = s_props,
};
sensor_t AHT21 = {
.name = "AHT21",
.private = ISAHT2x,
.address = 0x38,
.status = SENS_NOTINIT,
.init = s_init, .init = s_init,
.start = s_start, .start = s_start,
.heater = s_heater, .heater = s_heater,
.process = s_process, .process = s_process,
.properties = s_props, .properties = s_props,
.get_data = s_getdata
}; };

1
I2Csensors/aht.h
View File

@ -21,3 +21,4 @@
extern sensor_t AHT10; extern sensor_t AHT10;
extern sensor_t AHT15; extern sensor_t AHT15;
extern sensor_t AHT21;

18
I2Csensors/main.c
View File

@ -47,7 +47,7 @@ static sl_option_t cmdlnopts[] = {
end_option end_option
}; };
static int start(const sensor_t *s, uint8_t addr){ static int start(sensor_t *s, uint8_t addr){
if(!sensor_init(s, addr)){ if(!sensor_init(s, addr)){
WARNX("Can't init sensor"); WARNX("Can't init sensor");
return FALSE; return FALSE;
@ -59,14 +59,14 @@ static int start(const sensor_t *s, uint8_t addr){
return TRUE; return TRUE;
} }
static int printdata(const sensor_t *s){ static int printdata(sensor_t *s){
sensor_data_t D; sensor_data_t D;
if(!s->get_data(&D)){ if(!sensor_getdata(s, &D)){
WARNX("Can't read data, try again"); WARNX("Can't read data, try again");
if(!sensor_start(s)) WARNX("Oops: can't start"); if(!sensor_start(s)) WARNX("Oops: can't start");
return FALSE; return FALSE;
} }
sensor_props_t props = s->properties(); sensor_props_t props = sensor_properties(s);
if(props.T) printf("T=%.2f\n", D.T); if(props.T) printf("T=%.2f\n", D.T);
if(props.H) printf("H=%.2f\n", D.H); if(props.H) printf("H=%.2f\n", D.H);
if(props.P){ if(props.P){
@ -87,19 +87,20 @@ int main(int argc, char **argv){
if(!G.sensor) ERRX("Point sensor's name"); if(!G.sensor) ERRX("Point sensor's name");
if(G.slaveaddr && (G.slaveaddr < 8 || G.slaveaddr > 0x77)) ERRX("I2C address should be 7-bit and not forbidden"); if(G.slaveaddr && (G.slaveaddr < 8 || G.slaveaddr > 0x77)) ERRX("I2C address should be 7-bit and not forbidden");
if(!sensors_open(G.device)) ERR("Can't open %s", G.device); if(!sensors_open(G.device)) ERR("Can't open %s", G.device);
const sensor_t* s = sensor_find(G.sensor); sensor_t* s = sensor_new(G.sensor);
if(!s){ WARNX("Can't find sensor `%s` in supported list", G.sensor); goto clo; } if(!s){ WARNX("Can't find sensor `%s` in supported list", G.sensor); goto clo; }
if(G.heater > -1){ if(G.heater > -1){
if(s->properties().htr && s->heater){ sensor_props_t props = sensor_properties(s);
if(props.htr){
if(!sensor_init(s, G.slaveaddr)) ERRX("Can't init device"); if(!sensor_init(s, G.slaveaddr)) ERRX("Can't init device");
if(!s->heater(G.heater)) WARNX("Cant run heater command"); if(!sensor_heater(s, G.heater)) WARNX("Cant run heater command");
else green("Heater is %s\n", G.heater ? "on" : "off"); else green("Heater is %s\n", G.heater ? "on" : "off");
}else ERRX("The sensor have no heater"); }else ERRX("The sensor have no heater");
return 0; return 0;
} }
if(!start(s, G.slaveaddr)) goto clo; if(!start(s, G.slaveaddr)) goto clo;
while(1){ while(1){
sensor_status_t status = s->process(); sensor_status_t status = sensor_process(s);
if(status == SENS_RDY){ // data ready - get it if(status == SENS_RDY){ // data ready - get it
if(!printdata(s)) continue; if(!printdata(s)) continue;
break; break;
@ -109,6 +110,7 @@ int main(int argc, char **argv){
} }
usleep(10000); usleep(10000);
} }
sensor_delete(&s);
clo: clo:
sensors_close(); sensors_close();

56
I2Csensors/sensor.c
View File

@ -22,11 +22,11 @@
#include "aht.h" #include "aht.h"
#include "BMP180.h" #include "BMP180.h"
#include "i2c.h" #include "i2c.h"
#include "sensor.h" #include "sensors_private.h"
#include "SI7005.h" #include "SI7005.h"
// NULL-terminated list of all supported sensors // NULL-terminated list of all supported sensors
static const sensor_t* supported_sensors[] = {&AHT10, &AHT15, &BMP180, &SI7005, NULL}; static const sensor_t* supported_sensors[] = {&AHT10, &AHT15, &AHT21, &BMP180, &SI7005, NULL};
// just two stupid wrappers // just two stupid wrappers
int sensors_open(const char *dev){ int sensors_open(const char *dev){
@ -37,9 +37,10 @@ void sensors_close(){
} }
// init sensor with optional new address // init sensor with optional new address
int sensor_init(const sensor_t *s, uint8_t address){ int sensor_init(sensor_t *s, uint8_t address){
if(!s) return FALSE; if(!s) return FALSE;
address = s->address(address); if(address) s->address = address;
else address = s->address; // default
if(!i2c_set_slave_address(address)){ if(!i2c_set_slave_address(address)){
DBG("Can't set slave address 0x%02x", address); DBG("Can't set slave address 0x%02x", address);
return FALSE; return FALSE;
@ -50,21 +51,32 @@ int sensor_init(const sensor_t *s, uint8_t address){
} }
double t0 = sl_dtime(); double t0 = sl_dtime();
int result = FALSE; int result = FALSE;
while(sl_dtime() - t0 < I2C_TIMEOUT && !(result = s->init())) usleep(10000); while(sl_dtime() - t0 < I2C_TIMEOUT && !(result = s->init(s))) usleep(10000);
return result; return result;
} }
// find supported sensor by name // find supported sensor by name and return allocated struct
const sensor_t* sensor_find(const char *name){ sensor_t *sensor_new(const char *name){
if(!name || !*name) return NULL; if(!name || !*name) return NULL;
const sensor_t **p = supported_sensors; const sensor_t **p = supported_sensors;
while(*p){ while(*p){
if(0 == strcmp((*p)->name, name)) return *p; if(0 == strcmp((*p)->name, name)){
sensor_t *n = MALLOC(sensor_t, 1);
memcpy(n, *p, sizeof(sensor_t));
return n;
}
++p; ++p;
} }
return NULL; return NULL;
} }
void sensor_delete(sensor_t **s){
if(!s || !*s) return;
if((*s)->privdata) FREE((*s)->privdata);
// here could be additional free's
FREE((*s));
}
// list all supported sensors // list all supported sensors
void sensors_list(){ void sensors_list(){
const sensor_t **p = supported_sensors; const sensor_t **p = supported_sensors;
@ -77,10 +89,34 @@ void sensors_list(){
} }
// wrapper with timeout // wrapper with timeout
int sensor_start(const sensor_t *s){ int sensor_start(sensor_t *s){
if(!s) return FALSE; if(!s) return FALSE;
double t0 = sl_dtime(); double t0 = sl_dtime();
int result = FALSE; int result = FALSE;
while(sl_dtime() - t0 < I2C_TIMEOUT && !(result = s->start())) usleep(10000); while(sl_dtime() - t0 < I2C_TIMEOUT && !(result = s->start(s))) usleep(10000);
return result; return result;
} }
int sensor_getdata(sensor_t *s, sensor_data_t *d){
if(!s || !d) return FALSE;
if(s->status != SENS_RDY) return FALSE;
*d = s->data;
s->status = SENS_RELAX;
return TRUE;
}
sensor_status_t sensor_process(sensor_t *s){
if(!s) return FALSE;
return s->process(s);
}
sensor_props_t sensor_properties(sensor_t *s){
sensor_props_t def = {0};
if(!s) return def;
return s->properties(s);
}
int sensor_heater(sensor_t *s, int on){
if(!s || !s->properties(s).htr || !s->heater) return FALSE;
return s->heater(s, on);
}

2
I2Csensors/sensor.creator.user
View File

@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE QtCreatorProject> <!DOCTYPE QtCreatorProject>
<!-- Written by QtCreator 17.0.2, 2025-10-11T01:16:49. --> <!-- Written by QtCreator 17.0.2, 2025-10-12T01:47:56. -->
<qtcreator> <qtcreator>
<data> <data>
<variable>EnvironmentId</variable> <variable>EnvironmentId</variable>

1
I2Csensors/sensor.files
View File

@ -9,3 +9,4 @@ i2c.h
main.c main.c
sensor.c sensor.c
sensor.h sensor.h
sensors_private.h

Side by Side Swipe Overlay

Before

Width:  |  Height:  |  Size: 85 B

After

Width:  |  Height:  |  Size: 103 B

24
I2Csensors/sensor.h
View File

@ -43,21 +43,17 @@ typedef struct{
double P; double P;
} sensor_data_t; } sensor_data_t;
typedef struct{ //struct sensor_struct;
const char *name; // name typedef struct sensor_struct sensor_t;
uint32_t private; // private information (e.g. for almost similar sensors with some slight differences)
uint8_t (*address)(uint8_t new);// set/get sensor's address (get - if `new`==0)
int (*init)(); // init device - only @ start after POR
int (*start)(); // start measuring
int (*heater)(int); // turn heater on/off (1/0)
sensor_status_t (*process)(); // main polling process
sensor_props_t (*properties)(); // get properties
int (*get_data)(sensor_data_t*);// read data
} sensor_t;
int sensors_open(const char *dev); int sensors_open(const char *dev);
void sensors_close(); void sensors_close();
int sensor_init(const sensor_t *s, uint8_t address);
void sensors_list(); void sensors_list();
const sensor_t* sensor_find(const char *name); sensor_t* sensor_new(const char *name);
int sensor_start(const sensor_t *s); void sensor_delete(sensor_t **s);
sensor_props_t sensor_properties(sensor_t *s);
int sensor_init(sensor_t *s, uint8_t address);
int sensor_heater(sensor_t *s, int on);
int sensor_start(sensor_t *s);
sensor_status_t sensor_process(sensor_t *s);
int sensor_getdata(sensor_t *s, sensor_data_t *d);

36
I2Csensors/sensors_private.h Normal file
View File

@ -0,0 +1,36 @@
/*
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include "sensor.h"
// unfortunately, we have no "self" pointer in C, so we should add this struct calling to each function for further purposes
struct sensor_struct{
const char *name; // name
uint8_t address; // sensor's address
uint32_t private; // private information (e.g. for almost similar sensors with some slight differences)
void *privdata; // some private data for calibration etc
sensor_status_t status; // status of sensor
sensor_data_t data; // measured data
int (*init)(struct sensor_struct*); // init device - @ start after POR or in case of errors
int (*start)(struct sensor_struct*); // start measuring
int (*heater)(struct sensor_struct *, int); // turn heater on/off (1/0)
sensor_status_t (*process)(struct sensor_struct*); // main polling process
sensor_props_t (*properties)(struct sensor_struct*); // get properties
};