revised examples
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@ -1,14 +1,14 @@
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/*
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* SCLICK SCLICK
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* _________ __________
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* | | | | |
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* | | | | |
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* ----- ------------------ | ------
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* |
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* TIME_LIMIT TIME_LIMIT|
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* >---------< >----------<|
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* LATENCY WINDOW |
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* >----------<>----------< | => DCLICK INT
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* SCLICK SCLICK
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* __________ ___________
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* | | | | |
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* | | | | |
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* ----- -------------------- | ------
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* |
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* TIME_LIMIT TIME_LIMIT |
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* >---------< >--------< | ==> DCLICK_INT
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* LATENCY WINDOW >----|---<
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* >----------<>----------< LATENCY
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* */
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#define _GNU_SOURCE
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#include <stdio.h>
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@ -54,18 +54,20 @@ int main() {
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lis.cfg.filter.mode = LIS3DH_FILTER_MODE_NORMAL;
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lis.cfg.filter.cutoff = LIS3DH_FILTER_CUTOFF_8;
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lis.cfg.filter.click = 1; /* enable filtering for CLICK function */
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lis.cfg.click.xd = 1; /* enable X axis double click */
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lis.cfg.click.yd = 1; /* enable Y axis double click */
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lis.cfg.click.zd = 1; /* enable Z axis double click */
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lis.cfg.pin1.click = 1; /* enable click int src through pin1 */
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lis.cfg.int1.latch = 1; /* latch interrupt until INT1_SRC is read */
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/* 1 LSb = 16 mg @ FS_2G
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* so a 0.072g 'shock' is 72/16 = 4.5
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* However, the device can have up to +- 40mg read error
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* 0.112g => 112/16 = 15
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* so a 0.3g 'shock' is 300/16 = 18.75
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* However, the device can have up to +- 40mg read error, so add 40mg
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* 0.34g => 340/16 ~= 21
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*/
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lis.cfg.click_ths = 15; /* pretty sensitive */
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lis.cfg.click_ths = 21; /* pretty sensitive */
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/* Duration time is measured in N/ODR where:
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* --- N = The content of the intX_dur integer
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@ -88,6 +90,11 @@ int main() {
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/* error handling */
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}
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/* read CLICK_SRC to clear previous interrupts, if any */
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if (lis3dh_read_click(&lis)) {
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/* error handling */
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}
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for(;;) {
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/* poll interrupt on INT1 pin */
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@ -100,10 +107,10 @@ int main() {
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/* error handling */
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}
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/* only print data if DCLICK=1 in CLICK_SRC */
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/* only print if DCLICK=1 */
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if (LIS3DH_CLICK_DCLICK(lis.src.click)) {
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/* print data gathered from CLICK_SRC */
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printf("Click: X=%d, Y=%d, Z=%d, Sign=%d, S_en=%d, D_en=%d\n",
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printf("Click: X=%d, Y=%d, Z=%d, Sign=%d, S_CLICK=%d, D_CLICK=%d\n",
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LIS3DH_CLICK_SRC_X(lis.src.click),
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LIS3DH_CLICK_SRC_Y(lis.src.click),
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LIS3DH_CLICK_SRC_Z(lis.src.click),
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@ -111,6 +118,10 @@ int main() {
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LIS3DH_CLICK_SCLICK(lis.src.click),
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LIS3DH_CLICK_DCLICK(lis.src.click));
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}
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/* sleep for 5 ms because gpio sysfs is slow at clearing interrupts */
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/* not necessary with "real" IRQ */
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usleep(5000);
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}
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/* unregister interrupt */
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@ -45,7 +45,7 @@ int main() {
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/* 1 LSb = 16 mg @ FS_2G
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* 0.3g threshold = 300/16 = 18.75
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* add read error, +40mg => 240/16 = 21.25 ~= 21
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* add read error, +40mg => 340/16 = 21.25 ~= 21
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* if you for some reason don't want to use the HP filter,
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* just add 1g to the threshold calculation.
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*/
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@ -72,15 +72,13 @@ int main() {
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lis.cfg.int1.aoi = 0; /* set to 1 for AND mode */
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lis.cfg.int1.en_6d = 0;
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/* latch interrupt. might not work. */
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/* latch interrupt */
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lis.cfg.int1.latch = 1;
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/* set up a HP filter to ignore constant earth acceleration */
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lis.cfg.filter.mode = LIS3DH_FILTER_MODE_NORMAL_REF;
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lis.cfg.filter.cutoff = LIS3DH_FILTER_CUTOFF_8;
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lis.cfg.filter.ia1 = 1; /* enable filter for INT1 generator */
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/* write device config */
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if (lis3dh_configure(&lis)) {
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@ -111,13 +109,17 @@ int main() {
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/* print received interrupt .. */
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printf("IA=%d ZH=%d ZL=%d YH=%d YL=%d XH=%d XL=%d\n",
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!!(lis.src.int1 & 0x40),
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LIS3DH_INT_SRC_IA(lis.src.int1),
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LIS3DH_INT_SRC_Z_HIGH(lis.src.int1),
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LIS3DH_INT_SRC_Z_LOW(lis.src.int1),
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LIS3DH_INT_SRC_Y_HIGH(lis.src.int1),
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LIS3DH_INT_SRC_Y_LOW(lis.src.int1),
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LIS3DH_INT_SRC_X_HIGH(lis.src.int1),
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LIS3DH_INT_SRC_X_LOW(lis.src.int1));
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/* sleep for 5 ms because gpio sysfs is slow at clearing interrupts */
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/* not necessary with "real" IRQ */
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usleep(5000);
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}
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/* unregister interrupt */
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6
main.c
6
main.c
@ -118,13 +118,17 @@ int main() {
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/* print received interrupt .. */
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printf("IA=%d ZH=%d ZL=%d YH=%d YL=%d XH=%d XL=%d\n",
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!!(lis.src.int1 & 0x40),
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LIS3DH_INT_SRC_IA(lis.src.int1),
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LIS3DH_INT_SRC_Z_HIGH(lis.src.int1),
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LIS3DH_INT_SRC_Z_LOW(lis.src.int1),
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LIS3DH_INT_SRC_Y_HIGH(lis.src.int1),
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LIS3DH_INT_SRC_Y_LOW(lis.src.int1),
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LIS3DH_INT_SRC_X_HIGH(lis.src.int1),
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LIS3DH_INT_SRC_X_LOW(lis.src.int1));
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/* sleep for 5 ms because gpio sysfs is slow at clearing interrupts */
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/* not necessary with "real" IRQ */
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usleep(5000);
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}
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/* unregister interrupt */
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