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ltr329als.h
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/*
* ltr329als.h - Copyright (c) 2022-24 Andre M. Maree/KSS Technologies (Pty) Ltd.
*/
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
// ########################################### Macros ##############################################
#define ltr329alsI2C_LOGIC 1 // 0 = delay, 1= stretch, 2= stages
// ######################################## Enumerations ###########################################
enum {
ltr329alsCONTR = 0x80,
ltr329alsMEAS_RATE = 0x85,
ltr329alsPART_ID = 0x86,
ltr329alsMANUFAC_ID = 0x87,
ltr329alsDATA_CH1_0 = 0x88,
ltr329alsDATA_CH1_1 = 0x89,
ltr329alsDATA_CH0_0 = 0x8A,
ltr329alsDATA_CH0_1 = 0x8B,
ltr329alsSTATUS = 0x8C,
};
enum { // Status register bits
ltr329alsR_STATUS_TDR = 0x02,
ltr329alsR_STATUS_PDR = 0x04,
ltr329alsR_STATUS_PTDR = 0x08,
};
// ######################################### Structures ############################################
typedef struct __attribute__((packed)) {
u8_t mode:1; // 0=Standby 1=Active
u8_t reset:1;
u8_t gain:3;
u8_t res:3;
} ltr329als_control_t;
typedef struct __attribute__((packed)) {
u8_t rate:3; // LSB
u8_t time:3;
u8_t res:2;
} ltr329als_meas_rate_t;
typedef struct __attribute__((packed)) {
u8_t rev:4; // LSB
u8_t part:4;
} ltr329als_part_id_t;
typedef struct __attribute__((packed)) {
u8_t res:2; // LSB
u8_t data:1;
u8_t intr:1; // don't care value ???
u8_t gain:3;
u8_t valid:1;
} ltr329als_status_t;
typedef struct __attribute__((packed)) {
union {
ltr329als_control_t control;
u8_t CONTROL;
};
union {
ltr329als_meas_rate_t meas_rate;
u8_t MEAS_RATE;
};
union {
ltr329als_part_id_t part_id;
u8_t PART_ID;
};
u8_t MANUFAC_ID;
union {
union { // Channel 1 -
u16_t CH1;
u8_t ch1[2];
};
union { // Channel 0 -
u16_t CH0;
u8_t ch0[2];
};
u8_t ch[4];
};
union {
ltr329als_status_t status;
u8_t STATUS;
};
} ltr329als_reg_t;
DUMB_STATIC_ASSERT(sizeof(ltr329als_reg_t) == 9);
struct i2c_di_t;
typedef struct __attribute__((packed)) ltr329als_t { // SI70006/13/14/20/xx TMP & RH sensors
struct i2c_di_t * psI2C; // 4 bytes
SemaphoreHandle_t mux;
union {
ltr329als_reg_t Reg;
u8_t u8Buf[sizeof(ltr329als_reg_t)];
};
u8_t spare[3];
#if (ltr329alsI2C_LOGIC == 3) // 3 step read -> wait -> convert
TimerHandle_t th;
StaticTimer_t ts;
#endif
} ltr329als_t;
DUMB_STATIC_ASSERT(sizeof(ltr329als_t) == 20);
// ###################################### Public variables #########################################
// ###################################### Public functions #########################################
int ltr329alsReadReg(u8_t Reg, u8_t * pRxBuf);
int ltr329alsWriteReg(u8_t reg, u8_t val);
int ltr329alsIdentify(struct i2c_di_t * psI2C);
int ltr329alsConfig(struct i2c_di_t * psI2C);
int ltr329alsDiags(struct i2c_di_t * psI2C);
struct report_t;
int ltr329alsReportAll(struct report_t * psR);
#ifdef __cplusplus
}
#endif