| 0,0 → 1,87 |
|---|
| #ifndef MPL115A1_H |
| #define MPL115A1_H |
| |
| #include "mbed.h" |
| |
| /** barometric pressure and temperature sensor MPL115A1 control class, based on SPI |
| * |
| * Example: |
| * @code |
| * #include "mbed.h" |
| * #include "MPL115A1.h" |
| * |
| * SPI spi(p11,p12,p13); |
| * MPL115A1 bar(spi, p14); |
| * |
| * Serial pc(USBTX, USBRX); |
| * |
| * int main() { |
| * while(1) { |
| * wait(10); |
| * pc.printf("Pressure is %f\n", bar.readPressure()); |
| * pc.printf("Temperature is %f\n", bar.readTemperature()); |
| * } |
| * } |
| * @endcode |
| */ |
| |
| // real addresses, in read_register: address |= 0x80 |
| #define MPL115A1_PRESH 0x00 // 80 |
| #define MPL115A1_PRESL 0x02 // 82 |
| #define MPL115A1_TEMPH 0x04 // 84 |
| #define MPL115A1_TEMPL 0x06 // 86 |
| |
| #define MPL115A1_A0MSB 0x08 // 88 |
| #define MPL115A1_A0LSB 0x0A // 8A |
| #define MPL115A1_B1MSB 0x0C // 8C |
| #define MPL115A1_B1LSB 0x0E // 8E |
| #define MPL115A1_B2MSB 0x10 // 90 |
| #define MPL115A1_B2LSB 0x12 // 92 |
| #define MPL115A1_C12MSB 0x14 // 94 |
| #define MPL115A1_C12LSB 0x16 // 96 |
| #define MPL115A1_C11MSB 0x18 // 98 |
| #define MPL115A1_C11LSB 0x1A // 9A |
| #define MPL115A1_C22MSB 0x1C // 9C |
| #define MPL115A1_C22LSB 0x1E // 9E |
| |
| #define MPL115A1_STARTPRES 0x20 // start pressure measurement |
| #define MPL115A1_STARTTEMP 0x22 // start temperature measurement |
| #define MPL115A1_STARTBOTH 0x24 // start both simultaneously |
| |
| class MPL115A1 { |
| private: |
| SPI& _spi; |
| DigitalOut _cs; // chip select, active low |
| //DigitalOut sdn; // shutdown pin, high=on, low=off |
| |
| public: |
| /** Create a barometer object connected to the SPI bus and specified chip select pin |
| * |
| * @param spi SPI master object |
| * @param ncs chip select pin |
| */ |
| MPL115A1(SPI& spi, PinName ncs); |
| /** start measurement, read registers, calculate and return pressure */ |
| float readPressure(); |
| /** start measurement, read registers, calculate and return temperature */ |
| float readTemperature(); |
| |
| private: |
| void write_register(uint8_t address, char data); |
| char read_register(uint8_t address); |
| |
| signed char sia0MSB, sia0LSB; |
| signed char sib1MSB, sib1LSB; |
| signed char sib2MSB, sib2LSB; |
| signed char sic12MSB, sic12LSB; |
| signed char sic11MSB, sic11LSB; |
| signed char sic22MSB, sic22LSB; |
| signed int sia0, sib1, sib2, sic12, sic11, sic22, siPcomp; |
| float decPcomp; |
| signed long lt1, lt2, lt3, si_c11x1, si_a11, si_c12x2; |
| signed long si_a1, si_c22x2, si_a2, si_a1x1, si_y1, si_a2x2; |
| unsigned int uiPadc, uiTadc; |
| unsigned char uiPH, uiPL, uiTH, uiTL; |
| }; |
| |
| #endif |