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fixed old examples

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This commit is contained in:
William Clark 2024-01-02 11:00:49 +00:00
parent b0528ff456
commit 96a2a8336a
3 changed files with 59 additions and 53 deletions
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2
example/double-click.c
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@ -58,7 +58,7 @@ int main() {
lis.cfg.click.yd = 1; /* enable Y axis double click */
lis.cfg.click.zd = 1; /* enable Z axis double click */
lis.cfg.pin1.click = 1; /* enable click int src through pin1 */
lis.cfg.pin1.latch = 1;
lis.cfg.int1.latch = 1; /* latch interrupt until INT1_SRC is read */
/* 1 LSb = 16 mg @ FS_2G
* so a 0.072g 'shock' is 72/16 = 4.5

2
example/single-click.c
View File

@ -46,7 +46,7 @@ int main() {
lis.cfg.click.ys = 1; /* enable Y axis single click */
lis.cfg.click.zs = 1; /* enable Z axis single click */
lis.cfg.pin1.click = 1; /* enable click int src through pin1 */
lis.cfg.pin1.latch = 1; /* latch this request I think */
lis.cfg.int1.latch = 1; /* latch interrupt until INT1_SRC is read */
/* 1 LSb = 16 mg @ FS_2G
* so a 0.072g 'shock' is 72/16 = 4.5

106
main.c
View File

@ -1,15 +1,3 @@
/*
* SCLICK SCLICK
* _________ __________
* | | | | |
* | | | | |
* ----- ------------------ | ------
* |
* TIME_LIMIT TIME_LIMIT|
* >---------< >----------<|
* LATENCY WINDOW |
* >----------<>----------< | => DCLICK INT
* */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
@ -20,7 +8,6 @@
#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) {
@ -58,22 +45,18 @@ int main() {
/* set up config */
lis.cfg.mode = LIS3DH_MODE_HR;
lis.cfg.range = LIS3DH_FS_2G;
lis.cfg.rate = LIS3DH_ODR_400_HZ; /* minimum recommended ODR */
lis.cfg.filter.mode = LIS3DH_FILTER_MODE_NORMAL;
lis.cfg.filter.cutoff = LIS3DH_FILTER_CUTOFF_8;
lis.cfg.filter.click = 1; /* enable filtering for CLICK function */
lis.cfg.click.xd = 1; /* enable X axis double click */
lis.cfg.click.yd = 1; /* enable Y axis double click */
lis.cfg.click.zd = 1; /* enable Z axis double click */
lis.cfg.pin1.click = 1; /* enable click int src through pin1 */
lis.cfg.pin1.latch = 1;
lis.cfg.rate = LIS3DH_ODR_400_HZ;
lis.cfg.pin1.ia1 = 1; /* allow INT1 through INT_PIN1 */
/* 1 LSb = 16 mg @ FS_2G
* so a 0.072g 'shock' is 72/16 = 4.5
* However, the device can have up to +- 40mg read error
* 0.112g => 112/16 = 15
* 0.3g threshold = 300/16 = 18.75
* add read error, +40mg => 240/16 = 21.25 ~= 21
* if you for some reason don't want to use the HP filter,
* just add 1g to the threshold calculation.
*/
lis.cfg.click_ths = 15; /* pretty sensitive */
lis.cfg.int1_ths = 21;
/* Duration time is measured in N/ODR where:
* --- N = The content of the intX_dur integer
@ -82,48 +65,71 @@ int main() {
* 400 2.5
*
* For ODR=400:
* time_limit of 75 ms = 75/2.5 = 30
* time_latency of 40 ms = 40/2.5 = 16
* time_window of 500 ms = 500/2.5 = 200
*
* 10 ms => 10/2.5 = 5
* lis.cfg.int1_dur = 5; <== 10 ms minimum duration to wake up
*/
lis.cfg.time_limit = 30; /* range: 0-127 */
lis.cfg.time_latency = 16; /* range: 0-255 */
lis.cfg.time_window = 200; /* range: 0-255 */
lis.cfg.int1_dur = 0; /* instantaneous */
/* enable X_high, Y_high and Z_high */
lis.cfg.int1.yh = 1;
lis.cfg.int1.zh = 1;
lis.cfg.int1.xh = 1;
/* OR mode. Think about the axis combinations for AND mode */
lis.cfg.int1.aoi = 0; /* set to 1 for AND mode */
lis.cfg.int1.en_6d = 0;
/* latch interrupt. might not work. */
lis.cfg.int1.latch = 1;
/* set up a HP filter to ignore constant earth acceleration */
lis.cfg.filter.mode = LIS3DH_FILTER_MODE_NORMAL_REF;
lis.cfg.filter.cutoff = LIS3DH_FILTER_CUTOFF_8;
lis.cfg.filter.ia1 = 1; /* enable filter for INT1 generator */
/* write device config */
if (lis3dh_configure(&lis)) {
quit("configure()", &lis);
}
for(;;) {
/* read REFERENCE to set filter to current accel field */
if (lis3dh_reference(&lis)) {
quit("reference()", &lis);
}
/* poll interrupt on INT1 pin */
/* read INT1_SRC to clear old interrupt if any */
if (lis3dh_read_int1(&lis)) {
quit("read_int1()", &lis);
}
for( ;; ) {
/* wait for INT1 to go active */
if (int_poll(GPIO_INTERRUPT_PIN_INT1)) {
quit("int_poll()", &lis);
}
/* read CLICK_SRC when interrupt has fired */
if (lis3dh_read_click(&lis)) {
quit("read_click()", &lis);
/* read INT1_SRC */
if (lis3dh_read_int1(&lis)) {
quit("read_int1()", &lis);
}
/* only print data if DCLICK=1 in CLICK_SRC */
if (LIS3DH_CLICK_DCLICK(lis.src.click)) {
/* 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));
}
/* print received interrupt .. */
printf("IA=%d ZH=%d ZL=%d YH=%d YL=%d XH=%d XL=%d\n",
!!(lis.src.int1 & 0x80), /* seems to always be cleared */
LIS3DH_INT_SRC_Z_HIGH(lis.src.int1),
LIS3DH_INT_SRC_Z_LOW(lis.src.int1),
LIS3DH_INT_SRC_Y_HIGH(lis.src.int1),
LIS3DH_INT_SRC_Y_LOW(lis.src.int1),
LIS3DH_INT_SRC_X_HIGH(lis.src.int1),
LIS3DH_INT_SRC_X_LOW(lis.src.int1));
}
/* unregister interrupt */
if (int_unregister(GPIO_INTERRUPT_PIN_INT1)) {
quit("int_unregister()", &lis);
quit("int_unregister()", &lis);
}
/* deinitalise struct */