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filter default and fifo size check

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William Clark 2023-12-23 15:34:20 +00:00
parent 5d3d1437f9
commit 48ee2a6932
1 changed files with 6 additions and 7 deletions
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13
lis3dh.c
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@ -59,7 +59,7 @@ int lis3dh_init(lis3dh_t *lis3dh) {
lis3dh->cfg.fifo.fth = 32; /* default watermark level. */
lis3dh->cfg.filter.mode = 0xFF; /* in use if neq 0xFF */
lis3dh->cfg.filter.cutoff = 0;
lis3dh->cfg.filter.fds = 0;
lis3dh->cfg.filter.fds = 1; /* bypass OFF by default */
lis3dh->cfg.filter.hpclick = 0;
lis3dh->cfg.filter.ia1 = 0;
lis3dh->cfg.filter.ia2 = 0;
@ -221,9 +221,8 @@ static uint8_t acc_sensitivity(lis3dh_t *lis3dh) {
}
int lis3dh_read(lis3dh_t *lis3dh) {
uint8_t data[6];
int16_t x, y, z;
int32_t x, y, z;
uint8_t scale, sens;
int err = 0;
@ -247,8 +246,7 @@ int lis3dh_read(lis3dh_t *lis3dh) {
}
int lis3dh_read_fifo(lis3dh_t *lis3dh, struct lis3dh_fifo_data *fifo) {
int16_t x, y, z;
int32_t x, y, z;
uint8_t scale, sens;
uint8_t data[192]; /* max size */
int err = 0;
@ -257,14 +255,15 @@ int lis3dh_read_fifo(lis3dh_t *lis3dh, struct lis3dh_fifo_data *fifo) {
scale = acc_shift(lis3dh);
sens = acc_sensitivity(lis3dh);
fifo->size = lis3dh->cfg.fifo.fth;
/* fifo buffer is max 32 */
fifo->size = lis3dh->cfg.fifo.fth > 32 ? 32 : lis3dh->cfg.fifo.fth;
/* must set MSbit of the address to multi-read and
have the device auto-increment the address.
see 5.1.5 in datasheet. */
err |= lis3dh->dev.read(REG_OUT_X_L | 0x80, data, 192);
for(i=0, idx=0; i<lis3dh->cfg.fifo.fth * 6; i+=6, idx++) {
for (i=0, idx=0; i<fifo->size * 6; i+=6, idx++) {
x = (((int16_t)((data[i + 0] << 8) | data[i + 1])) >> scale) * sens;
y = (((int16_t)((data[i + 2] << 8) | data[i + 3])) >> scale) * sens;
z = (((int16_t)((data[i + 4] << 8) | data[i + 5])) >> scale) * sens;