Nicholas Herriot / Mbed 2 deprecated MMA8452_test

A test utility for mma8452

Dependencies:   MMA8452 mbed

main.cpp@7:2fa57cf76768, 2013-10-17 (annotated)

Committer:
nherriot
Date:
Thu Oct 17 09:40:52 2013 +0000
Revision:
7:2fa57cf76768
Parent:
6:94d7ca596f52 
commit bug fix for multiple start bit on IIC bus.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
matsu 0:904e837fccc5 1 #include "mbed.h"
nherriot 2:0587772b03b0 2 //#include <bitset>
nherriot 2:0587772b03b0 3 #include "MMA8452.h"
nherriot 4:489573e65d47 4 #include "helperFunctions.h"
nherriot 2:0587772b03b0 5
nherriot 2:0587772b03b0 6 // I2C i2c(p28,p27);
nherriot 3:6d888ac31d2c 7 Accelerometer_MMA8452 accelerometer(p28, p27, 40000);
nherriot 3:6d888ac31d2c 8 //Accelerometer_MMA8452 acclerometer(p28, p29);
nherriot 2:0587772b03b0 9
matsu 0:904e837fccc5 10 Serial pc(USBTX, USBRX);
matsu 0:904e837fccc5 11 DigitalOut led1(LED1);
matsu 0:904e837fccc5 12 DigitalOut led2(LED2);
matsu 0:904e837fccc5 13 DigitalOut led3(LED3);
matsu 0:904e837fccc5 14
nherriot 4:489573e65d47 15
nherriot 4:489573e65d47 16
matsu 0:904e837fccc5 17 int main() {
matsu 0:904e837fccc5 18 led1 = 0;
matsu 0:904e837fccc5 19 led2 = 0;
matsu 0:904e837fccc5 20 led3 = 0;
nherriot 5:34fa5db89a3a 21
nherriot 4:489573e65d47 22 char x_buffer[2]; // used to store a bit array from the x axis acclerometer
nherriot 4:489573e65d47 23 char y_buffer[2]; // this represents the raw data value from the acclerometer
nherriot 4:489573e65d47 24 char z_buffer[2]; // which is converted from 12bit to 16bit value 2s compliment.
matsu 0:904e837fccc5 25
nherriot 5:34fa5db89a3a 26 x_buffer[0] = 0x00;
nherriot 5:34fa5db89a3a 27 x_buffer[1] = 0x00;
nherriot 5:34fa5db89a3a 28 y_buffer[0] = 0x00;
nherriot 5:34fa5db89a3a 29 y_buffer[1] = 0x00;
nherriot 5:34fa5db89a3a 30 z_buffer[0] = 0x00;
nherriot 5:34fa5db89a3a 31 z_buffer[0] = 0x00;
nherriot 5:34fa5db89a3a 32
nherriot 5:34fa5db89a3a 33 int deviceSystemMode(0);
nherriot 5:34fa5db89a3a 34
nherriot 2:0587772b03b0 35 // just playing with address values
nherriot 2:0587772b03b0 36 char mcu_address = 0x00;
nherriot 2:0587772b03b0 37 pc.printf("\nmcu_address is: 0x%x ", mcu_address);
nherriot 2:0587772b03b0 38 mcu_address = MMA8452_ADDRESS;
nherriot 2:0587772b03b0 39 pc.printf("\nmcu_address is: 0x%x ", mcu_address);
nherriot 3:6d888ac31d2c 40 mcu_address = (MMA8452_ADDRESS<< 1); // shifting address by 1 bit as i2c is a 7 bit encoding, and this is 8bit encoded
nherriot 2:0587772b03b0 41 pc.printf("\nmcu_address is now : 0x%x ", mcu_address);
nherriot 2:0587772b03b0 42
matsu 0:904e837fccc5 43 wait(0.5);
matsu 0:904e837fccc5 44 //init
nherriot 2:0587772b03b0 45 //set active mode
nherriot 3:6d888ac31d2c 46 pc.printf("\nWriting to master register\n");
nherriot 5:34fa5db89a3a 47
nherriot 5:34fa5db89a3a 48 int deviceStatus = 0;
nherriot 5:34fa5db89a3a 49 if (accelerometer.get_Status(deviceStatus)==0)
nherriot 5:34fa5db89a3a 50 {
nherriot 5:34fa5db89a3a 51 pc.printf("\nGot the device Status - device status which is: 0x%x \n", deviceStatus);
nherriot 5:34fa5db89a3a 52 }
nherriot 5:34fa5db89a3a 53 else
nherriot 5:34fa5db89a3a 54 {
nherriot 5:34fa5db89a3a 55 pc.printf("\nFailed to get the device status. The id is set as: 0x%x ", deviceStatus);
nherriot 5:34fa5db89a3a 56 }
nherriot 6:94d7ca596f52 57
nherriot 6:94d7ca596f52 58
nherriot 6:94d7ca596f52 59 int ControlRegister(0);
nherriot 6:94d7ca596f52 60 if (accelerometer.get_CTRL_Reg1(ControlRegister)==0)
nherriot 6:94d7ca596f52 61 {
nherriot 6:94d7ca596f52 62 pc.printf("\nGot contents of Control Register1 which is: 0x%x \n", ControlRegister);
nherriot 6:94d7ca596f52 63
nherriot 6:94d7ca596f52 64
nherriot 6:94d7ca596f52 65 }
nherriot 6:94d7ca596f52 66 else
nherriot 6:94d7ca596f52 67 {
nherriot 6:94d7ca596f52 68 pc.printf("\nFailed to get the device status. The id is set as: 0x%x ", deviceStatus);
nherriot 6:94d7ca596f52 69 }
nherriot 6:94d7ca596f52 70
nherriot 6:94d7ca596f52 71
nherriot 6:94d7ca596f52 72 wait(5);
nherriot 5:34fa5db89a3a 73
nherriot 4:489573e65d47 74 for (int i=0;i<=50;i++)
nherriot 4:489573e65d47 75 {
nherriot 5:34fa5db89a3a 76
nherriot 3:6d888ac31d2c 77 if (accelerometer.activate()==0)
nherriot 3:6d888ac31d2c 78 {
nherriot 3:6d888ac31d2c 79 led1 = 1;
nherriot 3:6d888ac31d2c 80 led2 = 1;
nherriot 3:6d888ac31d2c 81 led3 = 1;
nherriot 3:6d888ac31d2c 82 pc.printf("\nActivated chip\n");
nherriot 3:6d888ac31d2c 83 wait(0.5);
nherriot 4:489573e65d47 84
nherriot 5:34fa5db89a3a 85
nherriot 5:34fa5db89a3a 86 for(int i=0; i<10;i++)
nherriot 3:6d888ac31d2c 87 {
nherriot 4:489573e65d47 88
nherriot 5:34fa5db89a3a 89 /*
nherriot 4:489573e65d47 90 if (accelerometer.read_x_raw(x_buffer)==0)
nherriot 4:489573e65d47 91 {
nherriot 4:489573e65d47 92 //pc.printf("\nThe x-axis LSB is: 0x%x", x);
nherriot 4:489573e65d47 93 pc.printf("The value of my x_buffer[0] in digit form is: %d in hex: 0x%x \n",x_buffer[0],x_buffer[0]);
nherriot 4:489573e65d47 94 pc.printf("The value of my x_buffer[1] in digit form is: %d in hex: 0x%x \n",x_buffer[1],x_buffer[1]);
nherriot 4:489573e65d47 95 print2bytebinchar(x_buffer);
nherriot 4:489573e65d47 96
nherriot 4:489573e65d47 97 }
nherriot 4:489573e65d47 98 else
nherriot 4:489573e65d47 99 {
nherriot 4:489573e65d47 100 pc.printf("\nError - could not get xaxis LSB! ....\n");
nherriot 4:489573e65d47 101 }
nherriot 4:489573e65d47 102
nherriot 5:34fa5db89a3a 103 */
nherriot 4:489573e65d47 104
nherriot 3:6d888ac31d2c 105
nherriot 5:34fa5db89a3a 106 /*
nherriot 4:489573e65d47 107 if (accelerometer.read_y_raw(y_buffer)==0)
nherriot 4:489573e65d47 108 {
nherriot 4:489573e65d47 109 //pc.printf("\nThe x-axis LSB is: 0x%x", x);
nherriot 4:489573e65d47 110 pc.printf("The value of my y_buffer[0] in digit form is: %d in hex: 0x%x \n",y_buffer[0],y_buffer[0]);
nherriot 4:489573e65d47 111 pc.printf("The value of my y_buffer[1] in digit form is: %d in hex: 0x%x \n",y_buffer[1],y_buffer[1]);
nherriot 4:489573e65d47 112 print2bytebinchar(y_buffer);
nherriot 4:489573e65d47 113
nherriot 4:489573e65d47 114 }
nherriot 4:489573e65d47 115 else
nherriot 4:489573e65d47 116 {
nherriot 4:489573e65d47 117 pc.printf("\nError - could not get yaxis LSB! ....\n");
nherriot 4:489573e65d47 118 }
nherriot 4:489573e65d47 119
nherriot 5:34fa5db89a3a 120 */
nherriot 5:34fa5db89a3a 121
nherriot 4:489573e65d47 122
nherriot 4:489573e65d47 123
nherriot 4:489573e65d47 124 if (accelerometer.read_z_raw(z_buffer)==0)
nherriot 4:489573e65d47 125 {
nherriot 4:489573e65d47 126 //pc.printf("\nThe x-axis LSB is: 0x%x", x);
nherriot 4:489573e65d47 127 pc.printf("The value of my z_buffer[0] in digit form is: %d in hex: 0x%x \n",z_buffer[0],z_buffer[0]);
nherriot 4:489573e65d47 128 pc.printf("The value of my z_buffer[1] in digit form is: %d in hex: 0x%x \n",z_buffer[1],z_buffer[1]);
nherriot 5:34fa5db89a3a 129 print2bytebinchar(z_buffer);
nherriot 4:489573e65d47 130
nherriot 4:489573e65d47 131 }
nherriot 4:489573e65d47 132 else
nherriot 4:489573e65d47 133 {
nherriot 4:489573e65d47 134 pc.printf("\nError - could not get zaxis LSB! ....\n");
nherriot 4:489573e65d47 135 }
nherriot 4:489573e65d47 136
nherriot 4:489573e65d47 137
nherriot 4:489573e65d47 138
nherriot 5:34fa5db89a3a 139 wait(0.5);
nherriot 4:489573e65d47 140 }
nherriot 3:6d888ac31d2c 141 }
nherriot 3:6d888ac31d2c 142 else
nherriot 3:6d888ac31d2c 143 {
nherriot 3:6d888ac31d2c 144 pc.printf("Could not activate the chip\n");
nherriot 3:6d888ac31d2c 145 }
nherriot 4:489573e65d47 146
nherriot 4:489573e65d47 147
nherriot 4:489573e65d47 148 int deviceID= 0;
nherriot 4:489573e65d47 149 if (accelerometer.get_DeviceID(deviceID)==0)
nherriot 4:489573e65d47 150 {
nherriot 4:489573e65d47 151 pc.printf("\nGot the who am I - device id which is: 0x%x \n", deviceID);
nherriot 4:489573e65d47 152 }
nherriot 4:489573e65d47 153 else
nherriot 4:489573e65d47 154 {
nherriot 4:489573e65d47 155 pc.printf("\nFailed to get the device id. The id is set as: 0x%x ", deviceID);
nherriot 4:489573e65d47 156
nherriot 4:489573e65d47 157 }
nherriot 4:489573e65d47 158
nherriot 4:489573e65d47 159 if (accelerometer.get_Status(deviceStatus)==0)
nherriot 4:489573e65d47 160 {
nherriot 4:489573e65d47 161 pc.printf("\nGot the device Status - device system mode which is: 0x%x \n", deviceSystemMode);
nherriot 4:489573e65d47 162 }
nherriot 4:489573e65d47 163 else
nherriot 4:489573e65d47 164 {
nherriot 4:489573e65d47 165 pc.printf("\nFailed to get the device system mode. The id is set as: 0x%x ", deviceSystemMode);
nherriot 4:489573e65d47 166
nherriot 4:489573e65d47 167 }
nherriot 4:489573e65d47 168
nherriot 5:34fa5db89a3a 169 wait(2);
nherriot 4:489573e65d47 170
nherriot 4:489573e65d47 171 pc.printf("In loop %d, of repeated initialisation.\n",i);
nherriot 4:489573e65d47 172 i++;
nherriot 3:6d888ac31d2c 173 }
matsu 0:904e837fccc5 174
matsu 0:904e837fccc5 175 //get analog data
nherriot 4:489573e65d47 176 pc.printf("Set system into standby mode.........");
nherriot 4:489573e65d47 177
nherriot 4:489573e65d47 178 if(accelerometer.standby()==0)
nherriot 4:489573e65d47 179 {
nherriot 4:489573e65d47 180 pc.printf("Device set into standby...\n");
nherriot 4:489573e65d47 181 }
nherriot 4:489573e65d47 182 else
nherriot 4:489573e65d47 183 {
nherriot 4:489573e65d47 184 pc.printf("Device failed to set into standby...\n");
nherriot 4:489573e65d47 185 }
nherriot 5:34fa5db89a3a 186
nherriot 4:489573e65d47 187 pc.printf("\nGet system mode, it should now be standby! ...\n");
nherriot 4:489573e65d47 188 if (accelerometer.get_SystemMode(deviceSystemMode)==0)
nherriot 4:489573e65d47 189 {
nherriot 4:489573e65d47 190 pc.printf("\nGot the device System Mode - device system mode which is: 0x%x \n", deviceSystemMode);
nherriot 4:489573e65d47 191 }
nherriot 4:489573e65d47 192 else
nherriot 4:489573e65d47 193 {
nherriot 4:489573e65d47 194 pc.printf("\nFailed to get the device system mode. The id is set as: 0x%x ", deviceSystemMode);
nherriot 4:489573e65d47 195
nherriot 4:489573e65d47 196 }
nherriot 4:489573e65d47 197
nherriot 5:34fa5db89a3a 198 }