1*4882a593SmuzhiyunCMA3000-D0x Accelerometer 2*4882a593Smuzhiyun========================= 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunSupported chips: 5*4882a593Smuzhiyun* VTI CMA3000-D0x 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunDatasheet: 8*4882a593Smuzhiyun CMA3000-D0X Product Family Specification 8281000A.02.pdf 9*4882a593Smuzhiyun <http://www.vti.fi/en/> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun:Author: Hemanth V <hemanthv@ti.com> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun 14*4882a593SmuzhiyunDescription 15*4882a593Smuzhiyun----------- 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunCMA3000 Tri-axis accelerometer supports Motion detect, Measurement and 18*4882a593SmuzhiyunFree fall modes. 19*4882a593Smuzhiyun 20*4882a593SmuzhiyunMotion Detect Mode: 21*4882a593Smuzhiyun Its the low power mode where interrupts are generated only 22*4882a593Smuzhiyun when motion exceeds the defined thresholds. 23*4882a593Smuzhiyun 24*4882a593SmuzhiyunMeasurement Mode: 25*4882a593Smuzhiyun This mode is used to read the acceleration data on X,Y,Z 26*4882a593Smuzhiyun axis and supports 400, 100, 40 Hz sample frequency. 27*4882a593Smuzhiyun 28*4882a593SmuzhiyunFree fall Mode: 29*4882a593Smuzhiyun This mode is intended to save system resources. 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunThreshold values: 32*4882a593Smuzhiyun Chip supports defining threshold values for above modes 33*4882a593Smuzhiyun which includes time and g value. Refer product specifications for 34*4882a593Smuzhiyun more details. 35*4882a593Smuzhiyun 36*4882a593SmuzhiyunCMA3000 chip supports mutually exclusive I2C and SPI interfaces for 37*4882a593Smuzhiyuncommunication, currently the driver supports I2C based communication only. 38*4882a593SmuzhiyunInitial configuration for bus mode is set in non volatile memory and can later 39*4882a593Smuzhiyunbe modified through bus interface command. 40*4882a593Smuzhiyun 41*4882a593SmuzhiyunDriver reports acceleration data through input subsystem. It generates ABS_MISC 42*4882a593Smuzhiyunevent with value 1 when free fall is detected. 43*4882a593Smuzhiyun 44*4882a593SmuzhiyunPlatform data need to be configured for initial default values. 45*4882a593Smuzhiyun 46*4882a593SmuzhiyunPlatform Data 47*4882a593Smuzhiyun------------- 48*4882a593Smuzhiyun 49*4882a593Smuzhiyunfuzz_x: 50*4882a593Smuzhiyun Noise on X Axis 51*4882a593Smuzhiyun 52*4882a593Smuzhiyunfuzz_y: 53*4882a593Smuzhiyun Noise on Y Axis 54*4882a593Smuzhiyun 55*4882a593Smuzhiyunfuzz_z: 56*4882a593Smuzhiyun Noise on Z Axis 57*4882a593Smuzhiyun 58*4882a593Smuzhiyung_range: 59*4882a593Smuzhiyun G range in milli g i.e 2000 or 8000 60*4882a593Smuzhiyun 61*4882a593Smuzhiyunmode: 62*4882a593Smuzhiyun Default Operating mode 63*4882a593Smuzhiyun 64*4882a593Smuzhiyunmdthr: 65*4882a593Smuzhiyun Motion detect g range threshold value 66*4882a593Smuzhiyun 67*4882a593Smuzhiyunmdfftmr: 68*4882a593Smuzhiyun Motion detect and free fall time threshold value 69*4882a593Smuzhiyun 70*4882a593Smuzhiyunffthr: 71*4882a593Smuzhiyun Free fall g range threshold value 72*4882a593Smuzhiyun 73*4882a593SmuzhiyunInput Interface 74*4882a593Smuzhiyun--------------- 75*4882a593Smuzhiyun 76*4882a593SmuzhiyunInput driver version is 1.0.0 77*4882a593SmuzhiyunInput device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0 78*4882a593SmuzhiyunInput device name: "cma3000-accelerometer" 79*4882a593Smuzhiyun 80*4882a593SmuzhiyunSupported events:: 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun Event type 0 (Sync) 83*4882a593Smuzhiyun Event type 3 (Absolute) 84*4882a593Smuzhiyun Event code 0 (X) 85*4882a593Smuzhiyun Value 47 86*4882a593Smuzhiyun Min -8000 87*4882a593Smuzhiyun Max 8000 88*4882a593Smuzhiyun Fuzz 200 89*4882a593Smuzhiyun Event code 1 (Y) 90*4882a593Smuzhiyun Value -28 91*4882a593Smuzhiyun Min -8000 92*4882a593Smuzhiyun Max 8000 93*4882a593Smuzhiyun Fuzz 200 94*4882a593Smuzhiyun Event code 2 (Z) 95*4882a593Smuzhiyun Value 905 96*4882a593Smuzhiyun Min -8000 97*4882a593Smuzhiyun Max 8000 98*4882a593Smuzhiyun Fuzz 200 99*4882a593Smuzhiyun Event code 40 (Misc) 100*4882a593Smuzhiyun Value 0 101*4882a593Smuzhiyun Min 0 102*4882a593Smuzhiyun Max 1 103*4882a593Smuzhiyun Event type 4 (Misc) 104*4882a593Smuzhiyun 105*4882a593Smuzhiyun 106*4882a593SmuzhiyunRegister/Platform parameters Description 107*4882a593Smuzhiyun---------------------------------------- 108*4882a593Smuzhiyun 109*4882a593Smuzhiyunmode:: 110*4882a593Smuzhiyun 111*4882a593Smuzhiyun 0: power down mode 112*4882a593Smuzhiyun 1: 100 Hz Measurement mode 113*4882a593Smuzhiyun 2: 400 Hz Measurement mode 114*4882a593Smuzhiyun 3: 40 Hz Measurement mode 115*4882a593Smuzhiyun 4: Motion Detect mode (default) 116*4882a593Smuzhiyun 5: 100 Hz Free fall mode 117*4882a593Smuzhiyun 6: 40 Hz Free fall mode 118*4882a593Smuzhiyun 7: Power off mode 119*4882a593Smuzhiyun 120*4882a593Smuzhiyungrange:: 121*4882a593Smuzhiyun 122*4882a593Smuzhiyun 2000: 2000 mg or 2G Range 123*4882a593Smuzhiyun 8000: 8000 mg or 8G Range 124*4882a593Smuzhiyun 125*4882a593Smuzhiyunmdthr:: 126*4882a593Smuzhiyun 127*4882a593Smuzhiyun X: X * 71mg (8G Range) 128*4882a593Smuzhiyun X: X * 18mg (2G Range) 129*4882a593Smuzhiyun 130*4882a593Smuzhiyunmdfftmr:: 131*4882a593Smuzhiyun 132*4882a593Smuzhiyun X: (X & 0x70) * 100 ms (MDTMR) 133*4882a593Smuzhiyun (X & 0x0F) * 2.5 ms (FFTMR 400 Hz) 134*4882a593Smuzhiyun (X & 0x0F) * 10 ms (FFTMR 100 Hz) 135*4882a593Smuzhiyun 136*4882a593Smuzhiyunffthr:: 137*4882a593Smuzhiyun 138*4882a593Smuzhiyun X: (X >> 2) * 18mg (2G Range) 139*4882a593Smuzhiyun X: (X & 0x0F) * 71 mg (8G Range) 140