#define _GNU_SOURCE #include #include #include #include #include "lis3dh.h" #include "interrupt.h" #include "i2c.h" #define GPIO_INTERRUPT_PIN_INT1 12 #define GPIO_INTERRUPT_PIN_INT2 16 /* print message then exit */ static void quit(const char *msg, lis3dh_t *lis) { lis->dev.deinit(); fprintf(stderr, "%s\n", msg); exit(1); } int main() { lis3dh_t lis; /* set fn ptrs to rw on bus (i2c or SPI) */ lis.dev.init = i2c_init; lis.dev.read = i2c_read; lis.dev.write = i2c_write; lis.dev.sleep = usleep; lis.dev.deinit = i2c_deinit; /* initialise LIS3DH struct */ if (lis3dh_init(&lis)) { quit("init()", &lis); } /* reset device because it sometimes corrupts itself */ if (lis3dh_reset(&lis)) { quit("reset()", &lis); } /* register interrupt */ if (int_register(GPIO_INTERRUPT_PIN_INT1)) { quit("int_register()", &lis); } /* set up config */ lis.cfg.mode = LIS3DH_MODE_HR; lis.cfg.range = LIS3DH_FS_2G; lis.cfg.rate = LIS3DH_ODR_400_HZ; lis.cfg.filter.mode = LIS3DH_FILTER_MODE_NORMAL; lis.cfg.filter.cutoff = LIS3DH_FILTER_CUTOFF_8; lis.cfg.click.latch = 1; lis.cfg.click.xs = 1; lis.cfg.click.ys = 1; lis.cfg.click.zs = 1; lis.cfg.pin1.click = 1; /* 1 LSb = 16 mg @ FS_2G * so a 0.8g 'shock' is 800/16 = 50 */ lis.cfg.click_ths = 50; /* the 800 mg shock must be gone after 30 ms let's say .. */ /* Duration time is measured in N/ODR where: * --- N = The content of the intX_dur integer * --- ODR = the data rate, eg 100, 400... * [ODR] [1 LSb in milliseconds] * 400 2.5 * * At 400 ODR, 30ms/2.5ms = 16 */ lis.cfg.time_limit = 16; /* write device config */ if (lis3dh_configure(&lis)) { quit("configure()", &lis); } if (int_poll(GPIO_INTERRUPT_PIN_INT1)) { quit("int_poll()", &lis); } if (lis3dh_read_click(&lis)) { quit("read_click()", &lis); } /* print data gathered from CLICK_SRC */ printf("Click: X=%d, Y=%d, Z=%d, Sign=%d, S_en=%d, D_en=%d\n", LIS3DH_CLICK_SRC_X(lis.src.click), LIS3DH_CLICK_SRC_Y(lis.src.click), LIS3DH_CLICK_SRC_Z(lis.src.click), LIS3DH_CLICK_SIGN(lis.src.click), LIS3DH_CLICK_SCLICK(lis.src.click), LIS3DH_CLICK_DCLICK(lis.src.click)); /* unregister interrupt */ if (int_unregister(GPIO_INTERRUPT_PIN_INT1)) { quit("int_unregister()", &lis); } /* deinitalise struct */ if (lis3dh_deinit(&lis)) { quit("deinit()", &lis); } return 0; }