SmartSonic™ MEMS Ultrasonic ToF Sensors

Hi,

I'm trying to interface with a CH101 sensor. I am able to detect the sensor, and I think the firmware upload is working as expected, but the setup seems to fail at the "chdrv_wait_for_lock" function, with the I2C lines appearing to be pulled low and remain low. Has anyone else had an issue in this stage of the initialisation? The INT line is being pulsed high by the sensor after the bulk of the firmware has been written.

I am using an STM32 nucleo board.

Out of 10 prototype PCBs we assembled with CH201 and TI's wireless SoC CC1310, around 5 of the PCBs give very less detection range. When we monitored the INT pin of CH201, the waveform doesn't look good (Please refer the attached waveform). Is there a way for TDK to update the software so that, the INT pulse width can be generated for width of about 10uS or so?

Hello,
Can anyone tell me where can I found development kit for tdk smart bug?

Hi! I need to increase the INT pulse lenght when running the CH201 in free-running mode. It is currently measured to 1us. I am using the SAMD21 and when running at normal 48MHz this is not an issue, but when introducing MCU sleep mode and lower clock frequency on the MCU external interrupt handler peripheral, this 1us period becomes a problem. It is to short for the MCU to register new data available on the CH201.

Anybode here know how to do this change? Or if it is possible at all?

Hi,

I am trying to connect a DK-CH201 (https://www.digikey.at/de/products/detail/tdk-invensense/DK-CH201/10445773) to my PC using SonicLink 2.1.0 for CH201, however, I am unable to get a response from the sensor.

I program the sensor with the gprstr_str-201_v17 software.

The configuration procedure works without an error, but when I start the acquisition with a short pulse on the INT line, the sensor never response.
What could be the problem, or how can I find out what the problem could be?

I've tried to reach out to TDK via the support form in the developer portal. I'm looking at posts regarding the ultrasonic sensors and I don't see much activity from TDK on here... is this part still viable / supported? If so, can I get some support please?

Hi, I wonder if there is any information on the 8-bit addresses and commands one would use to do various things to the sensor through I2C protocol? I can find such info for other ultrasound sensors (e.g. for the SRF-08 0xE0 0x00 0x51 starts the sensor while 0xE0 0x01 0xE1 reads back the range data), but the documentation does not appear to cover such low-level details.

Hi Everyone,

I just wanted to clarify what I am getting from the Chirp Library.
Basically I understand the chip emits an ultrasonic centered chirp and receives back the echo. If the object is far away, the delay between the two waves (i.e emitted and received) can be quite significant. However, as most use cases I assume revolve around short ranges, the echo can be received whilst the initial chirp has not yet fully been emitted.

I followed the setup guide for the CH201 and haven't been able to get anywhere with it. I have it connected up with both microUSB ports to my computer but no matter what I do I can't get the application to sense the board.
Has anyone else had this issue?