Hi Federica,
I cannot produce a reg dump right now, but I can supply the code, which is based on STs own 2017-implementation, see below, two functions are supplied.
First the function LSM303AGR_InitActive() is used at startup to initiate and use the chip when the instrument is active to detect the presence of a magnet in the vicinity of the chip.
Then, there are two sleep modes used, I have included code below for the one called "transport", in which the LSM303, is configured to not wake up the system, as part of the system is always powered on and shall not be activated during transport or storage.
It is also this mode our production test script enables and were we see that some of the units are using
more current than they are supposed to.
Transport mode is entered by calling the function LSM303AGR_InitTransport().
Note, I suspect that the devices that is having a higher current draw in sleep mode also do that in active mode,
but its hard to tell as there are many other circuits activated. (Other test statistics makes me believe that... )
This leads me also the idea that the two unused pins is causing it.
Kind regards, Anders
static status_t LSM303AGR_InitActive(void) {
uint8_t *handle = 0;
/* Init Magnetometer */
/* Output data rate selection. */
if (LSM303AGR_MAG_W_ODR((void *)handle, LSM303AGR_MAG_ODR_10Hz) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Operating mode selection */
if (LSM303AGR_MAG_W_MD((void *)handle, LSM303AGR_MAG_MD_CONTINUOS_MODE) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Init Accelerometer */
/* Output data rate selection. */
if (LSM303AGR_ACC_W_ODR((void *)handle, LSM303AGR_ACC_ODR_DO_25Hz) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Disable low power. */
if (LSM303AGR_ACC_W_LOWPWR_EN((void *)handle, LSM303AGR_ACC_LPEN_DISABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Enable axes. */
if (LSM303AGR_ACC_W_XEN((void *)handle, LSM303AGR_ACC_XEN_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
if (LSM303AGR_ACC_W_YEN((void *)handle, LSM303AGR_ACC_YEN_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
if (LSM303AGR_ACC_W_ZEN((void *)handle, LSM303AGR_ACC_ZEN_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Enable BDU */
// (0: continuous update; 1: output registers contains latest status, not updated until MSB and LSB have been read)
if (LSM303AGR_ACC_W_BlockDataUpdate((void *)handle, LSM303AGR_ACC_BDU_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Interrupts */
// Threshold (1 LSb = 16 mg @ Full scale = ±2 g) 16mg/LSB => 315mg = 0x13
if (LSM303AGR_ACC_W_Int1_Threshold((void *)handle, 0x13) == MEMS_ERROR) {
return kStatus_Fail;
}
// Duration (N/ODR) 80ms => 0x02
if (LSM303AGR_ACC_W_Int1_Duration((void *)handle, 0x02) == MEMS_ERROR) {
return kStatus_Fail;
}
// Enable X interrupt
if (LSM303AGR_ACC_W_Int1EnXHi((void *)handle, LSM303AGR_ACC_XHIE_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Enable Y interrupt
if (LSM303AGR_ACC_W_Int1EnYHi((void *)handle, LSM303AGR_ACC_YHIE_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Enable Z interrupt
if (LSM303AGR_ACC_W_Int1EnZHi((void *)handle, LSM303AGR_ACC_ZHIE_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Latch interrupt on INT1
if (LSM303AGR_ACC_W_LatchInterrupt_on_INT1((void *)handle, LSM303AGR_ACC_LIR_INT1_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Enables interrupt 1 function on INT2 pin.
if (LSM303AGR_ACC_W_I2_on_INT1((void *)handle, LSM303AGR_ACC_I2_INT1_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Interrupt pin active low
if (LSM303AGR_ACC_W_IntActive((void *)handle, LSM303AGR_ACC_H_LACTIVE_ACTIVE_LO) == MEMS_ERROR) {
return kStatus_Fail;
}
// Enables high pass filter on interrupt
if (LSM303AGR_ACC_W_hpf_aoi_en_int1((void *)handle, LSM303AGR_ACC_HPIS1_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Autoreset high pass filter on interrupt event
if (LSM303AGR_ACC_W_hpf_mode((void *)handle, LSM303AGR_ACC_HPM_AUTORST_ON_INT) == MEMS_ERROR) {
return kStatus_Fail;
}
// Read data to reset filter
uint8_t data;
if (LSM303AGR_ACC_R_ReferenceVal((void *)handle, &data) == MEMS_ERROR) {
return kStatus_Fail;
}
LSM303AGR_ClearAccelInt();
return kStatus_Success;
}
static status_t LSM303AGR_InitTransport(void) {
// Changes compared to Active mode
uint8_t *handle = 0;
/* Output data rate selection. */
// Low-power mode (1Hz), Using "LSM303AGR_ACC_ODR_DO_PWR_DOWN" led to high current for some units.
if (LSM303AGR_ACC_W_ODR((void *)handle, LSM303AGR_ACC_ODR_DO_1Hz) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Enable low power. */
if (LSM303AGR_ACC_W_LOWPWR_EN((void *)handle, LSM303AGR_ACC_LPEN_ENABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Set MAG operation to idle */
if (LSM303AGR_MAG_W_MD((void *)handle, LSM303AGR_MAG_MD_IDLE1_MODE) == MEMS_ERROR) {
return kStatus_Fail;
}
/* Interrupts */
// Disable X interrupts
if (LSM303AGR_ACC_W_Int1EnXHi((void *)handle, LSM303AGR_ACC_XHIE_DISABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Disable Y interrupts
if (LSM303AGR_ACC_W_Int1EnYHi((void *)handle, LSM303AGR_ACC_YHIE_DISABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
// Disable Z interrupts
if (LSM303AGR_ACC_W_Int1EnZHi((void *)handle, LSM303AGR_ACC_ZHIE_DISABLED) == MEMS_ERROR) {
return kStatus_Fail;
}
LSM303AGR_ClearAccelInt();
return kStatus_Success;
}
