AIS2IH Read Data Registers

[scboris]

Hi,

I am using AIS2IH.

I  can see in terminal   window of my computer

that registers of  data and temperature are zero's.   0 0 0  ...

My program use the setup:

ais2ih_cs_mode_set(&dev_ctx, AIS2IH_PULL_UP_DISCONNECT);
ais2ih_i2c_interface_set(&dev_ctx, AIS2IH_I2C_DISABLE);
ais2ih_spi_mode_set(&dev_ctx, AIS2IH_SPI_4_WIRE);
ais2ih_reset_set(&dev_ctx, PROPERTY_ENABLE);

platform_delay(0x00333333);
ais2ih_reset_get(&dev_ctx, &rst);

platform_delay(0x00333333);
ais2ih_reset_get(&dev_ctx, &rst);

platform_delay(0x00333333);
ais2ih_cs_mode_set(&dev_ctx, AIS2IH_PULL_UP_DISCONNECT);
ais2ih_i2c_interface_set(&dev_ctx, AIS2IH_I2C_DISABLE);
ais2ih_spi_mode_set(&dev_ctx, AIS2IH_SPI_4_WIRE);
/* Set full scale */
ais2ih_full_scale_set(&dev_ctx, AIS2IH_2g);
/* Set Output Data Rate */
ais2ih_data_rate_set(&dev_ctx, AIS2IH_XL_ODR_400Hz);
ais2ih_filter_path_set(&dev_ctx, AIS2IH_LPF_ON_OUT);
ais2ih_filter_bandwidth_set(&dev_ctx, AIS2IH_ODR_DIV_4);
ais2ih_self_test_set(&dev_ctx, AIS2IH_XL_ST_DISABLE );
/* Configure power mode */
ais2ih_power_mode_set(&dev_ctx, AIS2IH_HIGH_PERFORMANCE_LOW_NOISE);

memset(data_raw_acceleration, 0x00, 3 * sizeof(int16_t));
ais2ih_acceleration_raw_get(&dev_ctx, &data_raw_acceleration);

ais2ih_temperature_raw_get(&dev_ctx, &data_raw_temperature);

ais2ih_status_dup_get(&dev_ctx,& reg3);

sprintf((char *)tx_bufferL,"\n\t\r A[r]:%d,%d,%d; T[C]:%d; R:%u,DUP=%u",data_raw_acceleration[0],data_raw_acceleration[1],data_raw_acceleration[2],data_raw_temperature,tempraw,reg3);
strcat(tx_buffer, tx_bufferL);

strcat(tx_buffer,"\r\n\0");
tx_com(tx_buffer, strlen((char const *)tx_buffer));

[scboris]

Whats wrong with my accelerometer?

Thank You

[scboris]

The  result is:

A[r]:0,0,0; T[C]:0; R:4,DUP=0

There R:4 is the AIS2IH_CTRL2 register value

[scboris]

What changes I  can made to get  the real values of the acceleration  or  temperature.

Thank You

[Federica Bossi]

Hi @scboris ,

Welcome to ST Community!

Can you try to implement our official example on github and let me know if you still have the problem?

Thanks.

[scboris]

OK!

[scboris]

Thank You!

I changed the code of the program as it is in the link above. I take the

ais2ih_read_data_polling.c

example.

  I take another AIS2Ih accelerometer. 

But still, It is  no changes at   the result.

[Federica Bossi · Accepted solution]

Hi @scboris ,

Can you share a photo of your setup?

[scboris]

Hi Federica!

What is the  setup?

Hardware(schematic diagram?) or software() or timing diagram of the setup?

void ais2ih_init(void)
{
/* Initialize mems driver interface. */
stmdev_ctx_t dev_ctx;
ais2ih_reg_t int_route;
dev_ctx.write_reg = platform_write;
dev_ctx.read_reg = platform_read;
dev_ctx.handle = &SENSOR_BUS;
/* Initialize platform specific hardware */
platform_init();
/* Wait sensor boot time */
platform_delay(BOOT_TIME);
ais2ih_reset_set(&dev_ctx, PROPERTY_ENABLE);
platform_delay(0x08333333);
ais2ih_reset_get(&dev_ctx, &rst);
platform_delay(0x08333333);
platform_delay(0x08333333);
ais2ih_reset_get(&dev_ctx, &rst);
platform_delay(0x08333333);
ais2ih_cs_mode_set(&dev_ctx, AIS2IH_PULL_UP_DISCONNECT);
platform_delay(0x08333333);
ais2ih_i2c_interface_set(&dev_ctx, AIS2IH_I2C_DISABLE);
platform_delay(0x08333333);
ais2ih_spi_mode_set(&dev_ctx, AIS2IH_SPI_4_WIRE);
platform_delay(0x08333333);

}

[scboris]

And the setup program is here:

ais2ih_device_id_get(&dev_ctx, &whoamI);
platform_delay(0x06333333);
ais2ih_device_id_get(&dev_ctx, &whoamI);
platform_delay(0x06333333);
ais2ih_device_id_get(&dev_ctx, &whoamI);
platform_delay(0x06333333);

/* Restore default configuration */
ais2ih_reset_set(&dev_ctx, PROPERTY_ENABLE);
platform_delay(0x06333333);
ais2ih_reset_get(&dev_ctx, &rst);
platform_delay(0x06333333);
platform_delay(0x00333333);
ais2ih_reset_get(&dev_ctx, &rst);
platform_delay(0x06333333);
ais2ih_cs_mode_set(&dev_ctx, AIS2IH_PULL_UP_DISCONNECT);
platform_delay(0x00333333);
platform_delay(0x06333333);
ais2ih_i2c_interface_set(&dev_ctx, AIS2IH_I2C_DISABLE);
platform_delay(0x00333333);
platform_delay(0x06333333);
ais2ih_spi_mode_set(&dev_ctx, AIS2IH_SPI_4_WIRE);
platform_delay(0x00333333);
platform_delay(0x06333333);
/* Enable Block Data Update */
ais2ih_block_data_update_set(&dev_ctx, PROPERTY_ENABLE);
platform_delay(0x06333333);
/* Set full scale */
ais2ih_full_scale_set(&dev_ctx, AIS2IH_2g);
platform_delay(0x00333333);
platform_delay(0x06333333);
ais2ih_filter_path_set(&dev_ctx, AIS2IH_LPF_ON_OUT);
platform_delay(0x00333333);
platform_delay(0x06333333);
ais2ih_filter_bandwidth_set(&dev_ctx, AIS2IH_ODR_DIV_4);
platform_delay(0x00333333);
platform_delay(0x06333333);
/* Configure power mode */
ais2ih_power_mode_set(&dev_ctx, AIS2IH_HIGH_PERFORMANCE);//AIS2IH_HIGH_PERFORMANCE_LOW_NOISE
platform_delay(0x08333333);
/* Set Output Data Rate */
ais2ih_data_rate_set(&dev_ctx, AIS2IH_XL_ODR_25Hz);//AIS2IH_XL_ODR_400Hz
platform_delay(0x08333333);