Maxim nexpaq / nexpaq_dev

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

libraries/tests/mbed/i2c_MMA8451Q/main.cpp@0:6c56fb4bc5f0, 2016-11-04 (annotated)

Committer:
nexpaq
Date:
Fri Nov 04 20:27:58 2016 +0000
Revision:
0:6c56fb4bc5f0
Moving to library for sharing updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 0:6c56fb4bc5f0 1 #include "mbed.h"
nexpaq 0:6c56fb4bc5f0 2 #include "MMA8451Q.h"
nexpaq 0:6c56fb4bc5f0 3 #include "test_env.h"
nexpaq 0:6c56fb4bc5f0 4
nexpaq 0:6c56fb4bc5f0 5 #ifdef TARGET_KL05Z
nexpaq 0:6c56fb4bc5f0 6 #define SDA PTB4
nexpaq 0:6c56fb4bc5f0 7 #define SCL PTB3
nexpaq 0:6c56fb4bc5f0 8
nexpaq 0:6c56fb4bc5f0 9 #elif TARGET_K20D50M
nexpaq 0:6c56fb4bc5f0 10 #define SDA PTB1
nexpaq 0:6c56fb4bc5f0 11 #define SCL PTB0
nexpaq 0:6c56fb4bc5f0 12
nexpaq 0:6c56fb4bc5f0 13 #else
nexpaq 0:6c56fb4bc5f0 14 #define SDA PTE25
nexpaq 0:6c56fb4bc5f0 15 #define SCL PTE24
nexpaq 0:6c56fb4bc5f0 16 #endif
nexpaq 0:6c56fb4bc5f0 17
nexpaq 0:6c56fb4bc5f0 18 namespace {
nexpaq 0:6c56fb4bc5f0 19 const int MMA8451_I2C_ADDRESS = 0x1D << 1; // I2C bus address
nexpaq 0:6c56fb4bc5f0 20 const float MMA8451_DIGITAL_SENSITIVITY = 4096.0; // Counts/g
nexpaq 0:6c56fb4bc5f0 21 }
nexpaq 0:6c56fb4bc5f0 22
nexpaq 0:6c56fb4bc5f0 23 float calc_3d_vector_len(float x, float y, float z) {
nexpaq 0:6c56fb4bc5f0 24 return sqrt(x*x + y*y + z*z);
nexpaq 0:6c56fb4bc5f0 25 }
nexpaq 0:6c56fb4bc5f0 26
nexpaq 0:6c56fb4bc5f0 27 #define TEST_ITERATIONS 25
nexpaq 0:6c56fb4bc5f0 28 #define TEST_ITERATIONS_SKIP 5
nexpaq 0:6c56fb4bc5f0 29 #define MEASURE_DEVIATION_TOLERANCE 0.025 // 2.5%
nexpaq 0:6c56fb4bc5f0 30
nexpaq 0:6c56fb4bc5f0 31 int main(void) {
nexpaq 0:6c56fb4bc5f0 32 MBED_HOSTTEST_TIMEOUT(15);
nexpaq 0:6c56fb4bc5f0 33 MBED_HOSTTEST_SELECT(default_auto);
nexpaq 0:6c56fb4bc5f0 34 MBED_HOSTTEST_DESCRIPTION(MMA8451Q accelerometer);
nexpaq 0:6c56fb4bc5f0 35 MBED_HOSTTEST_START("KL25Z_5");
nexpaq 0:6c56fb4bc5f0 36
nexpaq 0:6c56fb4bc5f0 37 DigitalOut led(LED_GREEN);
nexpaq 0:6c56fb4bc5f0 38 MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS);
nexpaq 0:6c56fb4bc5f0 39 bool result = true;
nexpaq 0:6c56fb4bc5f0 40 printf("WHO AM I: 0x%2X\r\n\n", acc.getWhoAmI());
nexpaq 0:6c56fb4bc5f0 41
nexpaq 0:6c56fb4bc5f0 42 for (int i = 0; i < TEST_ITERATIONS; i++) {
nexpaq 0:6c56fb4bc5f0 43 if (i < TEST_ITERATIONS_SKIP) {
nexpaq 0:6c56fb4bc5f0 44 // Skip first 5 measurements
nexpaq 0:6c56fb4bc5f0 45 continue;
nexpaq 0:6c56fb4bc5f0 46 }
nexpaq 0:6c56fb4bc5f0 47 const float g_vect_len = calc_3d_vector_len(acc.getAccX(), acc.getAccY(), acc.getAccZ()) / MMA8451_DIGITAL_SENSITIVITY;
nexpaq 0:6c56fb4bc5f0 48 const float deviation = fabs(g_vect_len - 1.0);
nexpaq 0:6c56fb4bc5f0 49 const char *succes_str = deviation <= MEASURE_DEVIATION_TOLERANCE ? "[OK]" : "[FAIL]";
nexpaq 0:6c56fb4bc5f0 50 result = result && (deviation <= MEASURE_DEVIATION_TOLERANCE);
nexpaq 0:6c56fb4bc5f0 51 printf("X:% 6d Y:% 6d Z:% 5d GF:%0.3fg, dev:%0.3f ... %s\r\n", acc.getAccX(), acc.getAccY(), acc.getAccZ(), g_vect_len, deviation, succes_str);
nexpaq 0:6c56fb4bc5f0 52 wait(0.5);
nexpaq 0:6c56fb4bc5f0 53 led = !led;
nexpaq 0:6c56fb4bc5f0 54 }
nexpaq 0:6c56fb4bc5f0 55 MBED_HOSTTEST_RESULT(result);
nexpaq 0:6c56fb4bc5f0 56 }