After loading a new decission tree for the Machine Learning Core the behaviour of the Step count registers of the pedometer changed.
I must note that none of the code changed, just the register mapping corresponding the decision tree loaded to the MLC. With the previous setup the value was correctly read, the LSM6DSOX_STEP_COUNTER_L is copied into the lower part of the variable, and LSM6DSOX_STEP_COUNTER_H on the higher part.
But after the new tree was loaded, LSM6DSOX_STEP_COUNTER_L gets read on the lower part but for the higher part of the variable LSM6DSOX_STEP_COUNTER_L gets written again instead of LSM6DSOX_STEP_COUNTER_H.
To fix this we had to change the code from lsm6dsox_reg.c that reads this values from the registers,
Previous code without fix:
int32_t lsm6dsox_number_of_steps_get(stmdev_ctx_t *ctx, uint8_t *buff)
{
int32_t ret;
ret = lsm6dsox_mem_bank_set(ctx, LSM6DSOX_EMBEDDED_FUNC_BANK);
if (ret == 0) {
ret = lsm6dsox_read_reg(ctx, LSM6DSOX_STEP_COUNTER_L, buff, 2);
}
if (ret == 0) {
ret = lsm6dsox_mem_bank_set(ctx, LSM6DSOX_USER_BANK);
}
return ret;
}
Reading both LSM6DSOX_STEP_COUNTER_L and LSM6DSOX_STEP_COUNTER_H sepparately fixed the issue:
int32_t lsm6dsox_number_of_steps_get(stmdev_ctx_t *ctx, uint8_t *buff)
{
int32_t ret;
ret = lsm6dsox_mem_bank_set(ctx, LSM6DSOX_EMBEDDED_FUNC_BANK);
if (ret == 0) {
ret = lsm6dsox_read_reg(ctx, LSM6DSOX_STEP_COUNTER_L, buff, 1);
}
if (ret == 0) {
ret = lsm6dsox_read_reg(ctx, LSM6DSOX_STEP_COUNTER_H, buff+1, 1);
}
if (ret == 0) {
ret = lsm6dsox_mem_bank_set(ctx, LSM6DSOX_USER_BANK);
}
return ret;
}
Can somebody explain this bug or unexpected change of behaviour?
None of the registers for the pedometer configuration were changed.
Thanks in advance
