AKM AK9752 Ultra-small IR Sensor IC with I2C I/F
Diff: AK9752.cpp
- Revision:
- 0:d177a32f8f36
diff -r 000000000000 -r d177a32f8f36 AK9752.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/AK9752.cpp Wed Dec 27 06:26:33 2017 +0000 @@ -0,0 +1,247 @@ +#include "mbed.h" +#include "AK9752.h" + +#define REG_WIA1 0x00 +#define REG_WIA2 0x01 +#define REG_INFO1 0x02 +#define REG_INFO2 0x03 +#define REG_ST1 0x04 +#define REG_INTCAUSE 0x05 +#define REG_IR_LSB 0x06 +#define REG_IR_MSB 0x07 +#define REG_TMP_LSB 0x08 +#define REG_TMP_MSB 0x09 +#define REG_ST2 0x0A +#define REG_THIRH_LSB 0x0B +#define REG_THIRH_MSB 0x0C +#define REG_THIRL_LSB 0x0D +#define REG_THIRL_MSB 0x0E +#define REG_THTMPH_LSB 0x0F +#define REG_THTMPH_MSB 0x10 +#define REG_THTMPL_LSB 0x11 +#define REG_THTMPL_MSB 0x12 +#define REG_INTEN 0x13 +#define REG_CNTL1 0x14 +#define REG_CNTL2 0x15 +#define REG_CNTL3 0x16 + + +AK9752::AK9752(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) { + // activate the peripheral +} + +AK9752::~AK9752() { } + +int AK9752::readRegs(int addr, uint8_t * data, int len) { + char t[1] = {addr}; + int result ; + result = m_i2c.write(m_addr, t, 1, true); + if (result == 0) { + result = m_i2c.read(m_addr, (char *)data, len); + } + return( result ) ; +} + +int AK9752::writeRegs(uint8_t * data, int len) { + int result ; + result = m_i2c.write(m_addr, (char *)data, len); + return( result ) ; +} + +/** + * getCompanyCode + * the code is expected to be 0x48 + */ +uint8_t AK9752::getCompanyCode(void) +{ + uint8_t data ; + readRegs(REG_WIA1, &data, 1) ; + return(data) ; +} + +/** + * getDeviceID + * the ID is expected to be 0x14 + */ +uint8_t AK9752::getDeviceID(void) +{ + uint8_t data ; + readRegs(REG_WIA2, &data, 1) ; + return(data) ; +} + +bool AK9752::dataReady(void) /* returns ST1[0], read ST2 to clear */ +{ + uint8_t data ; + readRegs(REG_ST1, &data, 1) ; + return((data & 0x01) == 0x01) ; +} + +uint8_t AK9752::getIntcause(void) /* get REG_INTCAUSE (0x05) */ +{ + uint8_t data ; + readRegs(REG_INTCAUSE, &data, 1) ; + return( data ) ; +} + +int16_t AK9752::getRawIR(void) /* raw data, must be mulitplied by 0.4578 for pA */ +{ + uint16_t temp ; + uint8_t data[2] ; + readRegs(REG_IR_LSB, data, 2) ; + temp = (data[1] << 8) | data[0] ; + return( temp ) ; +} + +float AK9752::getIR(void) +{ + float fIR ; + uint16_t iIR ; + iIR = getRawIR() ; + fIR = iIR * 0.4578 ; + return( fIR ) ; +} + +int16_t AK9752::getRawTMP(void) /* raw data, must be multiplied by 0.0019837 and + 25 */ +{ + uint16_t temp ; + uint8_t data[2] ; + readRegs(REG_TMP_LSB, data, 2) ; + temp = (data[1] << 8) | data[0] ; + return( temp ) ; +} + +float AK9752::getTMP(void) +{ + float ftemp ; + uint16_t itemp ; + itemp = getRawTMP() ; + ftemp = itemp * 0.0019837 + 25.0 ; + return( ftemp ) ; +} + +bool AK9752::dataOverRun(void) /* check data over run and clear data ready */ +{ + uint8_t data ; + readRegs(REG_ST2, &data, 1) ; + return((data & 0x01) == 0x01) ; +} + +void AK9752::getTHIR(int16_t *high, int16_t *low) +{ + uint8_t data[4] ; + readRegs(REG_THIRH_LSB, data, 4) ; + *high = (data[1] << 8) | data[0] ; + *low = (data[3] << 8) | data[2] ; +} + +void AK9752::setTHIR(int16_t high, int16_t low) +{ + uint8_t data[5] ; + data[0] = REG_THIRH_LSB ; + data[1] = high & 0xFF ; + data[2] = (high >> 8) & 0xFF ; + data[3] = low & 0xFF ; + data[4] = (low >> 8) & 0xFF ; + writeRegs(data, 5) ; +} + +void AK9752::getTHTMP(int16_t *high, int16_t *low) +{ + uint8_t data[4] ; + readRegs(REG_THTMPH_LSB, data, 4) ; + *high = (data[1] << 8) | data[0] ; + *low = (data[3] << 8) | data[2] ; +} + +void AK9752::setTHTMP(int16_t high, int16_t low) +{ + uint8_t data[5] ; + data[0] = REG_THTMPH_LSB ; + data[1] = high & 0xFF ; + data[2] = (high >> 8) & 0xFF ; + data[3] = low & 0xFF ; + data[4] = (low >> 8) & 0xFF ; + writeRegs(data, 5) ; +} + +/** + * ITEN[4] = IRHI : IR upper threshold interrupt enable + * ITEN[3] = IRLI : IR lower threshold interrupt enable + * ITEN[2] = TMPHI : Temp upper threshold interrupt enable + * ITEN[1] = TMPLI : Temp lower threshold interrupt enable + * ITEN[0] = DRI : Data ready interrupt enable + */ +uint8_t AK9752::getINTEN(void) +{ + uint8_t value ; + readRegs(REG_INTEN, &value, 1) ; + return(value) ; +} + +void AK9752::setINTEN(uint8_t value) +{ + uint8_t t[2] ; + t[0] = REG_INTEN ; + t[1] = value ; + writeRegs(t, 2) ; +} + +/** + * CNTL1 + * CNTL1[4:2] = FCTMP[2:0] + * FCTMP = 000 : no digital filter + * FCTMP = 001 : Fc = 2.5Hz + * FCTMP = 010 : Fc = 0.9Hz + * FCTMP = 011 : Fc = 0.45Hz + * FCTMP = 100 : Fc = 0.22Hz + * FCTMP = other : (reserved) + * CNTL1[1:0] = FCIR[1:0] + * FCIR = 00 : no digital filter + * FCIR = 01 : Fc = 2.5Hz + * FCIR = 10 : Fc = 0.9Hz + * FCIR = 11 : Fc = 0.45Hz + */ +uint8_t AK9752::getCNTL1(void) +{ + uint8_t value ; + readRegs(REG_CNTL1, &value, 1) ; + return(value) ; +} + +void AK9752::setCNTL1(uint8_t value) +{ + uint8_t t[2] ; + t[0] = REG_CNTL1 ; + t[1] = value ; + writeRegs(t, 2) ; +} + +/** + * CNTL2 + * CNTL2[1:0] = MODE[1:0] + * MODE = 00 : standby + * MODE = 01 : continuous measure + * MODE = 10 : single shot + * MODE = 11 : (reserved) + */ +uint8_t AK9752::getCNTL2(void) +{ + uint8_t value ; + readRegs(REG_CNTL2, &value, 1) ; + return(value) ; +} + +void AK9752::setCNTL2(uint8_t value) +{ + uint8_t t[2] ; + t[0] = REG_CNTL2 ; + t[1] = value ; + writeRegs(t, 2) ; +} + +void AK9752::software_reset(void) +{ + uint8_t t[2] = { REG_CNTL3, 0xFF } ; + writeRegs(t, 2) ; +} \ No newline at end of file