Joe Knapp / lib_mma8451q

Moved pl_status to public

Fork of lib_mma8451q by wayne roberts

mma8451q.h@1:778b685c3ad0, 2015-05-08 (annotated)

Committer:
dudmuck
Date:
Fri May 08 01:31:18 2015 +0000
Revision:
1:778b685c3ad0
Parent:
0:cb0046a629c1
Child:
2:4bc96749141e
added interrupt handling

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dudmuck 0:cb0046a629c1 1 #include "mbed.h"
dudmuck 0:cb0046a629c1 2
dudmuck 0:cb0046a629c1 3 /* Xtrinsic accelerometer */
dudmuck 0:cb0046a629c1 4
dudmuck 0:cb0046a629c1 5 /*
dudmuck 0:cb0046a629c1 6 * MMA8451 Registers
dudmuck 0:cb0046a629c1 7 */
dudmuck 0:cb0046a629c1 8 #define MMA8451_STATUS 0x00
dudmuck 0:cb0046a629c1 9 #define MMA8451_OUT_X_MSB 0x01
dudmuck 0:cb0046a629c1 10 #define MMA8451_SYSMOD 0x0b //
dudmuck 0:cb0046a629c1 11 #define MMA8451_INT_SOURCE 0x0c //
dudmuck 0:cb0046a629c1 12 #define MMA8451_ID 0x0d
dudmuck 1:778b685c3ad0 13 #define MMA8451_PL_STATUS 0x10
dudmuck 1:778b685c3ad0 14 #define MMA8451_FF_MT_SRC 0x16
dudmuck 0:cb0046a629c1 15 #define MMA8451_TRANSIENT_CFG 0x1d // transient enable
dudmuck 0:cb0046a629c1 16 #define MMA8451_TRANSIENT_SRC 0x1e // transient read/clear interrupt
dudmuck 0:cb0046a629c1 17 #define MMA8451_TRANSIENT_THS 0x1f // transient threshold
dudmuck 0:cb0046a629c1 18 #define MMA8451_TRANSIENT_COUNT 0x20 // transient debounce
dudmuck 1:778b685c3ad0 19 #define MMA8451_PULSE_SRC 0x22
dudmuck 0:cb0046a629c1 20 #define MMA8451_CTRL_REG1 0x2a
dudmuck 0:cb0046a629c1 21 #define MMA8451_CTRL_REG2 0x2b
dudmuck 1:778b685c3ad0 22 #define MMA8451_CTRL_REG3 0x2c // interrupt control
dudmuck 0:cb0046a629c1 23 #define MMA8451_CTRL_REG4 0x2d // interrupt enable
dudmuck 0:cb0046a629c1 24 #define MMA8451_CTRL_REG5 0x2e // interrupt pin selection
dudmuck 0:cb0046a629c1 25
dudmuck 0:cb0046a629c1 26 typedef union {
dudmuck 0:cb0046a629c1 27 struct {
dudmuck 0:cb0046a629c1 28 int16_t x;
dudmuck 0:cb0046a629c1 29 int16_t y;
dudmuck 0:cb0046a629c1 30 int16_t z;
dudmuck 0:cb0046a629c1 31 } v;
dudmuck 0:cb0046a629c1 32 uint8_t octets[6];
dudmuck 0:cb0046a629c1 33 } mma_out_t;
dudmuck 0:cb0046a629c1 34
dudmuck 0:cb0046a629c1 35 typedef union {
dudmuck 0:cb0046a629c1 36 struct { // at 0x0c
dudmuck 0:cb0046a629c1 37 uint8_t SRC_DRDY : 1; // 0
dudmuck 0:cb0046a629c1 38 uint8_t reserved1 : 1; // 1
dudmuck 0:cb0046a629c1 39 uint8_t SRC_FF_MT : 1; // 2
dudmuck 0:cb0046a629c1 40 uint8_t SRC_PULSE : 1; // 3
dudmuck 0:cb0046a629c1 41 uint8_t SRC_LNDPRT : 1; // 4
dudmuck 0:cb0046a629c1 42 uint8_t SRC_TRANS : 1; // 5
dudmuck 0:cb0046a629c1 43 uint8_t reserved6 : 1; // 6
dudmuck 0:cb0046a629c1 44 uint8_t SRC_ASLP : 1; // 7
dudmuck 0:cb0046a629c1 45 } bits;
dudmuck 0:cb0046a629c1 46 uint8_t octet;
dudmuck 1:778b685c3ad0 47 } mma_int_source_t;
dudmuck 0:cb0046a629c1 48
dudmuck 0:cb0046a629c1 49 typedef union {
dudmuck 0:cb0046a629c1 50 struct { // at 0x1d
dudmuck 0:cb0046a629c1 51 uint8_t HPF_BYP : 1; // 0
dudmuck 0:cb0046a629c1 52 uint8_t XTEFE : 1; // 1
dudmuck 0:cb0046a629c1 53 uint8_t YTEFE : 1; // 2
dudmuck 0:cb0046a629c1 54 uint8_t ZTEFE : 1; // 3
dudmuck 0:cb0046a629c1 55 uint8_t ELE : 1; // 4
dudmuck 0:cb0046a629c1 56 uint8_t pad : 3; // 5,6,7
dudmuck 0:cb0046a629c1 57 } bits;
dudmuck 0:cb0046a629c1 58 uint8_t octet;
dudmuck 0:cb0046a629c1 59 } transient_cfg_t;
dudmuck 0:cb0046a629c1 60
dudmuck 0:cb0046a629c1 61 typedef union {
dudmuck 0:cb0046a629c1 62 struct { // at 0x1e
dudmuck 0:cb0046a629c1 63 uint8_t X_Trans_Pol : 1; // 0
dudmuck 0:cb0046a629c1 64 uint8_t XTRANSE : 1; // 1
dudmuck 0:cb0046a629c1 65 uint8_t Y_Trans_Pol : 1; // 2
dudmuck 0:cb0046a629c1 66 uint8_t YTRANSE : 1; // 3
dudmuck 0:cb0046a629c1 67 uint8_t Z_Trans_Pol : 1; // 4
dudmuck 0:cb0046a629c1 68 uint8_t ZTRANSE : 1; // 5
dudmuck 0:cb0046a629c1 69 uint8_t EA : 1; // 6
dudmuck 0:cb0046a629c1 70 uint8_t pad : 1; // 7
dudmuck 0:cb0046a629c1 71 } bits;
dudmuck 0:cb0046a629c1 72 uint8_t octet;
dudmuck 0:cb0046a629c1 73 } transient_src_t;
dudmuck 0:cb0046a629c1 74
dudmuck 0:cb0046a629c1 75 typedef union {
dudmuck 0:cb0046a629c1 76 struct { // at 0x2a
dudmuck 0:cb0046a629c1 77 uint8_t ACTIVE : 1; // 0
dudmuck 0:cb0046a629c1 78 uint8_t F_READ : 1; // 1
dudmuck 0:cb0046a629c1 79 uint8_t LNOISE : 1; // 2
dudmuck 0:cb0046a629c1 80 uint8_t DR : 3; // 3,4,5
dudmuck 0:cb0046a629c1 81 uint8_t ASLP_RATE : 2; // 6,7
dudmuck 0:cb0046a629c1 82 } bits;
dudmuck 0:cb0046a629c1 83 uint8_t octet;
dudmuck 0:cb0046a629c1 84 } ctrl_reg1_t;
dudmuck 0:cb0046a629c1 85
dudmuck 0:cb0046a629c1 86 typedef union {
dudmuck 0:cb0046a629c1 87 struct { // at 0x2d
dudmuck 0:cb0046a629c1 88 uint8_t INT_EN_DRDY : 1; // 0
dudmuck 0:cb0046a629c1 89 uint8_t reserved1 : 1; // 1
dudmuck 0:cb0046a629c1 90 uint8_t INT_EN_FF_MT : 1; // 2
dudmuck 0:cb0046a629c1 91 uint8_t INT_EN_PULSE : 1; // 3
dudmuck 0:cb0046a629c1 92 uint8_t INT_EN_LNDPRT : 1; // 4
dudmuck 0:cb0046a629c1 93 uint8_t INT_EN_TRANS : 1; // 5
dudmuck 0:cb0046a629c1 94 uint8_t reserved6 : 1; // 6
dudmuck 0:cb0046a629c1 95 uint8_t INT_EN_ASLP : 1; // 7
dudmuck 0:cb0046a629c1 96 } bits;
dudmuck 0:cb0046a629c1 97 uint8_t octet;
dudmuck 0:cb0046a629c1 98 } ctrl_reg4_t;
dudmuck 0:cb0046a629c1 99
dudmuck 0:cb0046a629c1 100 typedef union {
dudmuck 0:cb0046a629c1 101 struct { // at 0x2e
dudmuck 0:cb0046a629c1 102 uint8_t INT_CFG_DRDY : 1; // 0
dudmuck 0:cb0046a629c1 103 uint8_t reserved1 : 1; // 1
dudmuck 0:cb0046a629c1 104 uint8_t INT_CFG_FF_MT : 1; // 2
dudmuck 0:cb0046a629c1 105 uint8_t INT_CFG_PULSE : 1; // 3
dudmuck 0:cb0046a629c1 106 uint8_t INT_CFG_LNDPRT : 1; // 4
dudmuck 0:cb0046a629c1 107 uint8_t INT_CFG_TRANS : 1; // 5
dudmuck 0:cb0046a629c1 108 uint8_t reserved6 : 1; // 6
dudmuck 0:cb0046a629c1 109 uint8_t INT_CFG_ASLP : 1; // 7
dudmuck 0:cb0046a629c1 110 } bits;
dudmuck 0:cb0046a629c1 111 uint8_t octet;
dudmuck 0:cb0046a629c1 112 } ctrl_reg5_t;
dudmuck 0:cb0046a629c1 113
dudmuck 0:cb0046a629c1 114 class MMA8451Q {
dudmuck 0:cb0046a629c1 115 public:
dudmuck 1:778b685c3ad0 116 MMA8451Q(I2C& r, DigitalIn& int_pin);
dudmuck 0:cb0046a629c1 117 ~MMA8451Q();
dudmuck 0:cb0046a629c1 118 void print_regs(void);
dudmuck 0:cb0046a629c1 119 void set_active(char);
dudmuck 1:778b685c3ad0 120 bool get_active(void);
dudmuck 0:cb0046a629c1 121
dudmuck 0:cb0046a629c1 122 uint8_t read_single(uint8_t addr);
dudmuck 0:cb0046a629c1 123 void read(uint8_t addr, uint8_t *dst_buf, int length);
dudmuck 0:cb0046a629c1 124 void write(uint8_t addr, uint8_t data);
dudmuck 0:cb0046a629c1 125 void transient_detect(void);
dudmuck 1:778b685c3ad0 126 void service(void);
dudmuck 0:cb0046a629c1 127
dudmuck 0:cb0046a629c1 128 mma_out_t out;
dudmuck 0:cb0046a629c1 129 transient_cfg_t transient_cfg;
dudmuck 0:cb0046a629c1 130 ctrl_reg1_t ctrl_reg1;
dudmuck 0:cb0046a629c1 131 ctrl_reg4_t ctrl_reg4;
dudmuck 0:cb0046a629c1 132 ctrl_reg5_t ctrl_reg5;
dudmuck 0:cb0046a629c1 133
dudmuck 0:cb0046a629c1 134 private:
dudmuck 0:cb0046a629c1 135 I2C& m_i2c;
dudmuck 1:778b685c3ad0 136 DigitalIn& m_int_pin;
dudmuck 0:cb0046a629c1 137 };
dudmuck 0:cb0046a629c1 138