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Add BMP280/BME280 (tested only on BME); add SHT3x (bug: reads only once)

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This commit is contained in:
Edward Emelianov
2025-10-13 00:46:21 +03:00
parent b0097d5ee6
commit 7a37dc0d2f
12 changed files with 568 additions and 26 deletions
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16
I2Csensors/BMP180.c
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@@ -58,14 +58,6 @@ enum{
#define BMP180_READ_T (0x0E)
#define BMP180_READ_P (0x14)
typedef enum{
WAIT_T,
WAIT_P,
WAIT_NONE
} waitmsr_t;
static waitmsr_t wait4 = WAIT_NONE;
// mind that user can't change this
static const uint8_t bmp180_os = BMP180_OVERSMAX;
@@ -84,6 +76,7 @@ typedef struct {
int32_t MCfix;
int32_t AC1_fix;
int32_t Tuncomp; // uncompensated T value
uint8_t calibrated; // ==1 if calibration done
} __attribute__ ((packed)) CaliData_t;
/*
@@ -94,7 +87,7 @@ static void BMP180_setOS(BMP180_oversampling os){
static int readcompdata(sensor_t *s){
FNAME();
if(!s->privdata){
s->privdata = malloc(sizeof(CaliData_t));
s->privdata = calloc(1, sizeof(CaliData_t));
DBG("ALLOCA");
}
if(!i2c_read_data8(BMP180_REG_CALIB, sizeof(CaliData_t), (uint8_t*)s->privdata)) return FALSE;
@@ -105,7 +98,7 @@ static int readcompdata(sensor_t *s){
// prepare for further calculations
CaliData->MCfix = CaliData->MC << 11;
CaliData->AC1_fix = CaliData->AC1 << 2;
s->private = 1; // use private for calibration ready flag
CaliData->calibrated = 1;
DBG("Calibration rdy");
return TRUE;
}
@@ -150,7 +143,7 @@ static int BMP180_init(sensor_t *s){
// start measurement, @return 1 if all OK
static int BMP180_start(sensor_t *s){
if(!s->privdata || s->status == SENS_BUSY) return FALSE;
if(!s->privdata || s->status == SENS_BUSY || ((CaliData_t*)s->privdata)->calibrated == 0) return FALSE;
uint8_t reg = BMP180_READ_T | BMP180_CTRLM_SCO;
if(!i2c_write_reg8(BMP180_REG_CTRLMEAS, reg)){
s->status = SENS_ERR;
@@ -158,7 +151,6 @@ static int BMP180_start(sensor_t *s){
return FALSE;
}
s->status = SENS_BUSY;
wait4 = WAIT_T;
return TRUE;
}