Search found 49 matches

by anthony-ql
Wed Jan 13, 2021 4:52 pm
Forum: General Discussion
Topic: palmtop or mobile device
Replies: 1
Views: 373

Re: palmtop or mobile device

Once Qomu hardware is available for distribution, we will provide a few applications. We'll revisit this request and see if additional can be added to support your idea.
by anthony-ql
Wed Jan 13, 2021 4:50 pm
Forum: EOS-S3
Topic: I2C Master Registers
Replies: 15
Views: 2352

Re: I2C Master Registers

QORC-SDK application "qf_mqttsn_ai_app" has example for using I2C Master to communicate with I2C Sensor.
by anthony-ql
Wed Jan 13, 2021 4:48 pm
Forum: EOS-S3
Topic: Crystal as RTC source with SWD on pins 44/45
Replies: 1
Views: 259

Re: Crystal as RTC source with SWD on pins 44/45

I will get back to you on this topic with some clarity.
by anthony-ql
Wed Jan 13, 2021 4:46 pm
Forum: EOS-S3
Topic: Power on / reset circuit recommendation for EOS-S3
Replies: 3
Views: 304

Re: Power on / reset circuit recommendation for EOS-S3

We do have other HW platforms that is not available for general public. My recommendation for production product, you can use LDO with POR built-in or using an external POR circuit (similar to NCP803SN parts).
by anthony-ql
Wed Jan 13, 2021 4:39 pm
Forum: EOS-S3
Topic: Voltage level on the Output Pin
Replies: 1
Views: 148

Re: Voltage level on the Output Pin

There are two banks of IO on the EOS S3. The supplies for the IO is named as VCCIOA and VCCIOB (1.8V - 3.3V). The logical "1" for input signal is 0.65 * supplied voltage. Logical "0" for input is 06v (max). Hope this helps.
by anthony-ql
Wed Jan 13, 2021 3:55 pm
Forum: EOS-S3
Topic: I2C Master Registers
Replies: 15
Views: 2352

Re: I2C Master Registers

The QORC-SDK has included new application for QuickFeather that include example for adding I2C sensor to the device. Please check it out. Application "qf_mqttsn_ai_app" is using I2C for accessing QuickFeather on-board I2C sensor.
by anthony-ql
Wed Jan 13, 2021 3:52 pm
Forum: QuickFeather
Topic: Unable to run an application without using JLink?
Replies: 3
Views: 364

Re: Unable to run an application without using JLink?

Based on your provided information, it seems that the boot-strap is doing its job. With J1 and J7 removed, when the reset button is pressed and released, S3 will start the SM to access the flash device and check for valid program. If it is OK to proceed, the S3 will load the image from Flash to its ...
by anthony-ql
Wed Jan 13, 2021 3:40 pm
Forum: QuickFeather
Topic: QuickFeather first install of driver for Windows 10
Replies: 9
Views: 1189

Re: QuickFeather first install of driver for Windows 10

Thanks for the feedback. Are the Windows 10 version the same between the 2 machines? We have tested the board and drivers with Win 10 Pro.
by anthony-ql
Wed Jan 13, 2021 3:36 pm
Forum: QuickFeather
Topic: QuickFeather getting started (Windows)
Replies: 2
Views: 359

Re: QuickFeather getting started (Windows)

The QuickFeather has two operating modes: debug and boot-from-flash. J1 and J7, when not install allows S3 to boot-from-flash when the reset button is pressed and released. In this mode, the S3 will access the flash device for valid boot image, load the image into internal RAM and execute. When J1 a...
by anthony-ql
Thu Nov 12, 2020 4:23 am
Forum: EOS-S3
Topic: Power on / reset circuit recommendation for EOS-S3
Replies: 3
Views: 304

Re: Power on / reset circuit recommendation for EOS-S3

The QuickFeather is designed with the intention that the user need to press the reset button after power on (or changing boot-strap on IO19 and IO20) to start up the EOS S3. The state of IO19 and IO20 is latched at rising edge of SYS_RSTn to determine the boot state for EOS S3. When the SYS_RSTn is ...