Hi Silabs,

Gesture recognition using SI1153, the top of the chip will be covered with a 4mm glass cover. I hope the recognition distance is between 20mm~30mm.

Are there any suggestions for the following questions? Many thanks.

1. How should the external irLED be placed? What is the range of distance from the irLED to the SI1153?  What is the minimum? What is the maximum?

2.What is the appropriate distance between the 4mm glass above the chip and the SI1153 distance?

 

 

我目前正在使用si1133传感器，首先我想请问一下si1133传感器是否可以根据采集到的数据计算得出紫外线强度值(我需要的不是紫外线指数uvi，而是紫外线强度值)。

另外我已经参考论坛中的其它回答，采集到了传感器输出值，但是采集到的值是-2, 0, 1, 2, 3类似的值，请问我得到的采集值是否正确呢？

下面是我的一些代码，谢谢！

uint8_t si1133_init(void)
{
    uint32_t ret;

    /* Enable power to the sensor */
    // BOARD_envSensEnable( true );

    /* Allow some time for the part to power up */
    HAL_Delay(5);

    ret = si1133_reset();

    HAL_Delay(10);

    ret += si1133_param_set(SI1133_PARAM_CH_LIST, 0x01);
    ret += si1133_param_set(SI1133_PARAM_ADCCONFIG0, 0x78);
    ret += si1133_param_set(SI1133_PARAM_ADCSENS0, 0x09);
    ret += si1133_param_set(SI1133_PARAM_ADCPOST0, 0x40);
    
    if (0 != ret)
    {
        return 1;
    }
    
    return 0;
}

static uint8_t si1133_measurement_force(void)
{

   return si1133_send_cmd(SI1133_CMD_FORCE_CH);

}

int32_t SI1133_readUV() 
{
    int ret = -1;
    uint8_t temp;
    uint8_t temp2;
    uint8_t temp3;
    int32_t temp_full;
    
    ret = si1133_measurement_force();
    if (1 == ret)
    {
        return 1;
    }
   
    si1133_register_read(SI1133_REG_HOSTOUT0, &temp);
    si1133_register_read(SI1133_REG_HOSTOUT1, &temp2);
    si1133_register_read(SI1133_REG_HOSTOUT2, &temp3);

    temp_full = (int8_t) temp3 | ((int8_t) temp2<<8) | ((int8_t) temp<<16);
     
    HAL_Delay(300);
    
    return temp_full;       // 这里得到的返回值是-2, 0, 1, 2, 3类似的值
}

 

I would like to use the Si7210 in interrupt mode (not polling).

I have read the Si7210 datasheet and AN1018 from which I developed an I2C-based driver which works in polling mode.

BTW, I have also looked at the Si7210 driver for the Gecko SDK, but that code is not referenced or configured elsewhere in that SDK.

But after I change the configuration (see lid2.c for config) to interrupt mode, I do not see interrupts occurring.

I have checked my firmware driver by grounding the interrupt pin for the Si7210 and the i see an that my SoC sees this fake interrupt as it should.

I will attach my Si7210 driver and support code (zephyr_si7210.zip)

If anyone can shed some light on what is preventing interrupts, I would be very appreciative.

TIA,

Robin

We are working with Level3 for the Infotainment system having Si4796x tuner. Need softwares and the documentation required for the same. Infotainment runs with Android 9 automotive

Hello,

I am using nRF52832 with the BLE application to read the Si7021 sensor. The problem I encountered was that after starting the softdevice, turning Si7021 on and off caused nRF52832 to be restarted. So please tell me, what do things for SCL and SDA when booting Si7021?

My design:

Many thanks

Hi,

This is venkatesh N S from Aditya Auto products and Engg pvt ltd Bangalore India. I have purchased SI1153-AB00-GMR senor. I want to know whether I can get the ready PCB board to mount the sensor, if yes where can  I buy?

Hi Silabs,

About Optical heart rate sensor module Si1172. How accurate is its heart rate measurement? (For example, Heart rate within 50-150 range, error ±10%?)

Or what factors are involved in the accuracy of heart rate measurements? thanks.

Hi Silabs,

I import the EFM32PG_STK_Optical project into the Simplicity IDE,  An error occurred while building the project. Please see the picture below. 

And the error is not fixed.  Build the project again, it become a similar error.

Another question about SI1153. In the data sheet, the LED drive current is in the range of 5.5mA-354mA, In the Si115x GUI, it can be configured up to 390mA. why?

Hello,

I have read the datasheet of the sensor, but only receive the information when the i2c bus is free then si7021 will sleep. However I need si7021 to go to sleep while I read data from another sensor. How can I do this, Thanks a lot

Hi, I measure UV index by si1132 but it has measurement error.

The UV index which weather station forecast is 2, but measured by si1132 is 6.

There is no glass(or window) on the sensor and I measured UV index under direct sunlight, sensor was looking at the sun.

 

I configured the register, as shown below:

 

SI_WriteReg(SI1132_REG_COMMAND, SI1132_RESET);
delay_ms(10);
SI_WriteReg(SI1132_REG_HW_KEY, 0x17);
delay_ms(10);

WriteReg(SI1132_REG_UCOEF0, 0x7B);
WriteReg(SI1132_REG_UCOEF1, 0x6B);
WriteReg(SI1132_REG_UCOEF2, 0x01);
WriteReg(SI1132_REG_UCOEF3, 0x00); // Set Default UV Coefficients
WriteParam(SI1132_PARAM_CHLIST, SI_PARAM_CHLIST_EN_UV|SI_PARAM_CHLIST_EN_VIS|SI_PARAM_CHLIST_EN_IR); // Enable UV, VIS, IR
WriteParam(SI1132_PARAM_ALS_VIS_ADC_MISC, VIS_RANGE_HIGH); // Set High Signal Range for direct sunlight

WriteReg(SI1132_REG_MEAS_RATE0, 0x20); // measure rate for auto, 32 * 31.25us = 1ms

WriteReg(SI1132_REG_COMMAND, SI_ALS_AUTO); // Starts autonomous loop

 

Is there something wrong with my configuration? or is it  just sensor's accuracy problem?

 

Thanks.

Hi,

I've recently purchased Thunderboard sense 2 and it turned out to be greater than what I've expected. All those sensors in one small chip-like board, supporting BLE and so on.

The question is about the Si7210 Hall effect sensor.

What I'm trying to do is to measure magnetic field around an induction motor, so I can find out the supplied  frequency. With the factory preset condition, I've used the Thunderboard sense 2 (Si7210 hall sensor)  and obtained magnetic field data. To be able to perform spectral analysis (FFT) on the data, I needed sample rate of the hall effect sensor, which I couldn't not find in the datasheet. I was able to roughly estimate this by measuring time taken between the measurement begin and end points. But the time measurement was not accurate enough. (just a fraction of msec error was able to affect my final result)

So, here is the question. Can anyone point me to the direction where I can find this sample rate?  Or at least, how I can calculate the sample rate using the information provided in the datasheet?

Hi,

       The "sw_op" described in the Si7060 datasheet is a 9 bit number, but in the "Register Interface" description section, you can only see that the bit6-bit 0 of 0xC6 is "sw_op." Where are the other two bits?

Hi,

I'm trying to read values from the si1133 UV sensor however I continue to get 0.  I've tried to make this as basic as possible.

void write_register(uint8_t register_pointer, uint16_t register_value)
{
    HAL_StatusTypeDef status = HAL_OK;

    status = HAL_I2C_Mem_Write(&hi2c1, 0x55<<1, (uint16_t)register_pointer, I2C_MEMADD_SIZE_8BIT, 
        (uint8_t*)(&register_value), 1, HAL_MAX_DELAY);

    /* Check the communication status */
    if(status != HAL_OK)
    {
	  //print error has occured

    } else {
    	// success
    }
}

uint8_t read_register(uint8_t register_pointer)
{
    HAL_StatusTypeDef status = HAL_OK;
    uint8_t return_value = 0;

    status = HAL_I2C_Mem_Read(&hi2c1, 0x55<<1, (uint16_t)register_pointer, I2C_MEMADD_SIZE_8BIT, 
        &return_value, 2, HAL_MAX_DELAY);

    /* Check the communication status */
    if(status != HAL_OK)
    {
        //print error occured

    } else {
    	return return_value;
    }
}

int main(void) {
	write_register(SI1133_REG_COMMAND, SI1133_CMD_RESET);

	HAL_Delay(10);

	 // configure channel 0
	write_register(SI1133_PARAM_CH_LIST, 0x01);
	write_register(SI1133_PARAM_ADCCONFIG0, 0x78);
	write_register(SI1133_PARAM_ADCSENS0, 0x09);
	write_register(SI1133_PARAM_ADCPOST0, 0x40);

    while(1) {
        // start a measurement
        write_register(SI1133_REG_COMMAND, SI1133_CMD_FORCE_CH);
        uint8_t temp1, temp2, temp3;
        temp1 = read_register(SI1133_REG_HOSTOUT0); // All these values return 0
        temp2 = read_register(SI1133_REG_HOSTOUT1);
        temp3 = read_register(SI1133_REG_HOSTOUT2);

	    char aTxBuffer[16];
	    HAL_UART_Transmit(&hlpuart1, (uint8_t*)aTxBuffer, sprintf(aTxBuffer, "%d, %d, %d", temp1,temp2, temp3), 5000);

        HAL_Delay(1000);
    }

}

Any help on this would be great.  Thanks.

Hi, 

I am new to this sensor and need to use for a project. By looking to the datasheet i found this diagram, but can i know to which pin the INT pin should be connected?

Thanks