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by mkirk
Wed Sep 25, 2019 8:48 pm
Forum: Compute Module
Topic: CM3 Plus and WiFi/BT CYW43455
Replies: 42
Views: 5443

Re: CM3 Plus and WiFi/BT CYW43455

These modules also require port pins to control one or more of these signals: WL_HOST_WAKE WL_REG_ON BT_REG_ON BT_HOST_WAKE BT_DEV_WAKE Are these pins controlled by the driver? A DT overlay is needed to map them to GPIO so the driver can use them? Or should the application set these pins as needed ?...
by mkirk
Thu Sep 19, 2019 2:27 pm
Forum: Compute Module
Topic: CM3 Plus and WiFi/BT CYW43455
Replies: 42
Views: 5443

Re: CM3 Plus and WiFi/BT CYW43455

OK -thanks. This will target the SD1 (ALT3) for WiFi and not affect the SD0 (ALT0) used by the micro SD flash filesystem?

And I would do a similar dt-overlay=uart0 for the PL011 serial port to interface the HAT Bluetooth instead of the on-board chip?
by mkirk
Thu Sep 19, 2019 2:11 pm
Forum: Compute Module
Topic: CM3 Plus and WiFi/BT CYW43455
Replies: 42
Views: 5443

Re: CM3 Plus and WiFi/BT CYW43455

Murata makes the 1MW Wifi/BT module https://wireless.murata.com/type-1mw.html This uses same CYW43455 chipset as on Pi 3B+ and Pi 4. The 1MW is FCC/IC certified and will support external antennas. We need an external antenna which Pi 3B+ does not offer. Can we disable on-board CYW43455 and connect t...
by mkirk
Mon Sep 16, 2019 4:24 pm
Forum: Compute Module
Topic: CM3 Plus and WiFi/BT CYW43455
Replies: 42
Views: 5443

Re: CM3 Plus and WiFi/BT CYW43455

Another question, Is the WiFi/BT module on the Pi4 and 3B+ available for purchase and use on a CM3+ carrier board? Meaning it is a metal can encapsulating a complete WiFi/BT module on a PCB - that is soldered to the Pi PCB? Or are there discrete components (including the CYW43455) soldered to the Pi...
by mkirk
Mon Sep 09, 2019 6:31 pm
Forum: Compute Module
Topic: CM3 Plus and WiFi/BT CYW43455
Replies: 42
Views: 5443

Re: CM3 Plus and WiFi/BT CYW43455

PhilE: Thanks for this info, I was not aware of this HAT board. And yes, Roger Thornton has my inputs posted above. The Red Bear IoT WiFi/BT HAT appears to be discontinued - Red Bear is now part of Particle. However, the reference info and schematics showing the required connections are very helpful...
by mkirk
Fri Sep 06, 2019 9:08 pm
Forum: Compute Module
Topic: CM3 Plus and WiFi/BT CYW43455
Replies: 42
Views: 5443

Re: CM3 Plus and WiFi/BT CYW43455

To respond to PhilE comment on this topic.... Another Pi Foundation colleague (Roger Thornton) had a blog post recently. Roger was soliciting inputs from users on how the Pi Foundation could better help with commercial applications of the Pi platform, including the CM3+. One way would be to have ful...
by mkirk
Thu Sep 05, 2019 7:21 pm
Forum: Compute Module
Topic: Does the Pi Foundation offer any migration documentation for those moving from a 3B or 3B+ to a CM3+?
Replies: 4
Views: 708

Re: Does the Pi Foundation offer any migration documentation for those moving from a 3B or 3B+ to a CM3+?

Thanks. I reviewed all these documents and schematics. Things to note and new questions: 1) The USB/Ethernet LAN9514 chip (Pi 3B) uses a USB interface (not rMII ethernet PHY ) to connect to BCM2837 - section 9.4 of CM3+ specification. a) These would connect to SoDIMM pins 165 (USB_DP) and 167 (USB_D...
by mkirk
Thu Sep 05, 2019 6:36 pm
Forum: Device Tree
Topic: Device Tree to enable 2 serials and bluetooth
Replies: 5
Views: 1783

Re: Device Tree to enable 2 serials and bluetooth

Can you confirm UART pin mapping on GPIO for Pi 3B+ and CM3+

GPIO 14/15 (ALT0) = 32/33 (ALT 3) = TXD0/RXD0 = PL011 UART
GPIO 14/15 (ALT5) = 32/33 (ALT5) = 40/41 (ALT5) = TXD1/RXD1 = mini UART
by mkirk
Tue Aug 27, 2019 2:26 pm
Forum: Camera board
Topic: V2 Sony imx219 specifications?
Replies: 6
Views: 562

Re: V2 Sony imx219 specifications?

Found the SNR (36dB) here: https://www.raspberrypi.org/documentation/hardware/camera/ But no documented reference was given. Your link is a preliminary spec for the OV5647. Maybe a final released OV5647 datasheet was disclosed (under NDA) by Omnivision to Pi Foundation? Or was determined via measure...
by mkirk
Mon Aug 26, 2019 2:57 pm
Forum: Camera board
Topic: V2 Sony imx219 specifications?
Replies: 6
Views: 562

Re: V2 Sony imx219 specifications?

Is there an imager chip in the same product family as the Sony imx219 that would publish these specs?

Maybe these specs are worse than the v1 imager (OV5647) - that is why Sony won't publish them?
by mkirk
Fri Aug 23, 2019 4:38 pm
Forum: Compute Module
Topic: Does the Pi Foundation offer any migration documentation for those moving from a 3B or 3B+ to a CM3+?
Replies: 4
Views: 708

Does the Pi Foundation offer any migration documentation for those moving from a 3B or 3B+ to a CM3+?

Does the Pi Foundation offer any migration documentation for those moving from a 3B or 3B+ to a CM3+?

Just need to wire up a LAN/USB controller and WiFi/BT module correctly to the CM3+ to have the drivers work as on the 3B/3B+.
by mkirk
Thu Aug 22, 2019 2:41 pm
Forum: Camera board
Topic: V2 Sony imx219 specifications?
Replies: 6
Views: 562

Re: V2 Sony imx219 specifications?

Thanks for the link - I reviewed and still don't find these values in the datasheet. They state the IMX219 has high sensitivity, low dark current, but don't give values. One plot of color sensitivity (RGB) but again no values. No mention of Well capacity nor dynamic range. I would think S/N Ratio, W...
by mkirk
Wed Aug 21, 2019 10:24 pm
Forum: Camera board
Topic: V2 Sony imx219 specifications?
Replies: 6
Views: 562

V2 Sony imx219 specifications?

The V1 OV5647 Pi camera has published specifications for S/N Ratio, Well Capacity, Dynamic range and sensitivity. But the V2 Sony camera does not list them. https://www.raspberrypi.org/documentation/hardware/camera/ Are they available someplace else? Mainly interested in the S/N Ratio of the IMX219 ...
by mkirk
Tue Aug 20, 2019 9:25 pm
Forum: Advanced users
Topic: [Solved] Deactivate Cores
Replies: 7
Views: 6959

Re: [Solved] Deactivate Cores

Questions: 1) For maxcpus=4 , if one CPU core is at 100% load and running at max clock, e.g. 1.2 GHz. Are the other 3 cores (idle) also clocked at 1.2GHz? Or do these idle cores run at min clock , e.g. 600 MHz? 2) Does an idle core running at max clock use same power as a core with 100% load? I am g...
by mkirk
Tue Aug 20, 2019 9:10 pm
Forum: General discussion
Topic: Heatsinks official for rpi 4 ?
Replies: 44
Views: 6600

Re: Heatsinks official for rpi 4 ?

How does power consumption and CPU temperature vary with core loading (e.g. sysbench , stress or cpuburn-a53) ? Do these generate same amount of heat and power consumption? A) 1 core at 100%, 3 cores idle at max clock rate B) 2 cores at 100%, 2 cores idle at max clock rate C) 4 cores at 100% at max ...
by mkirk
Wed Jul 31, 2019 3:55 pm
Forum: Camera board
Topic: Raspberry v1 camera global (external) shutter videos
Replies: 43
Views: 5390

Re: Raspberry v1 camera global (external) shutter videos

The datasheet for the OV5647 states that it supports both rolling and global shutter modes. https://cdn.sparkfun.com/datasheets/Dev/RaspberryPi/ov5647_full.pdf Datasheet feature list on page 5: Shutter : rolling shutter / global shutter Register SC_CMMN_MISC_CTRL has bit[0] defined as cen_global_o I...
by mkirk
Wed Jul 17, 2019 8:13 pm
Forum: Beginners
Topic: Is it possible to have Acess Point and Wifi at the same time?
Replies: 7
Views: 619

Re: Is it possible to have Acess Point and Wifi at the same time?

Any recommended suppliers of USB WiFi adapters supporting AP+STA simultaneous mode? Also would want SMA or u.FL connector for external antenna.
by mkirk
Wed Jul 17, 2019 8:11 pm
Forum: General discussion
Topic: In search of reliable FCC-certified USB Wi-Fi adapter with removable antenna
Replies: 21
Views: 1680

Re: In search of reliable FCC-certified USB Wi-Fi adapter with removable antenna

I also am interested in this. Do these also support simultaneous AP+STA modes (Access point plus client/station) to extend WiFi network.

The CYW43438 chip on -board the 3B supports AP+STA.
by mkirk
Fri Jun 28, 2019 6:38 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 97575

Re: Raspberry Pi 4 Thread - general discussion

This does not make sense, the Pi 3B has CYW43438 chip that does not support 5 GHz WiFi

But 4B does support 5 GHz WiFi, so is is not the CYW43438 chip.

Did you mean to say the 4B uses the same chipset as the Pi 3B+ (not 3B)?
https://www.cypress.com/file/358916/download CYW43455
by mkirk
Fri Jun 28, 2019 6:29 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 97575

Re: Raspberry Pi 4 Thread - general discussion

What WiFi/BLE chipset is used on the new Pi 4B? I am guessing a Cypress (Broadcom) part, but does anyone know the part number? Will is support simultaneous AP + STA (client) mode like the CYW43438 on the Pi 3B? We have one on backorder, so when it arrives with can query iw list to check ourselves.
by mkirk
Mon Jun 24, 2019 3:04 pm
Forum: Advanced users
Topic: WiFi CYW43438 as AP+STA - max_assoc =?
Replies: 0
Views: 128

WiFi CYW43438 as AP+STA - max_assoc =?

For the onboard WiFi module CYW43438 on the Pi 3B, what is the max_assoc (max number of clients) in AP+STA mode? AP = Access Point, STA = Station (client - connected to a remote AP) I posed same question first to Cypress and they assume use of the WiCED SDK API where max_assoc is defined. They respo...
by mkirk
Tue May 14, 2019 10:15 pm
Forum: Troubleshooting
Topic: Packet loss/dropout with iperf3 - UDP
Replies: 4
Views: 379

Re: Packet loss/dropout with iperf3 - UDP

Continue to see data rate drops. iperf3 test runs at 28 to 40 Mbps for hours then drops to 2-4 Mbps for 4 hours then recovers and goes back to 28-40 Mbps. What could cause this ? Test was running for 24 hours.
by mkirk
Wed May 08, 2019 6:39 pm
Forum: Beginners
Topic: Sustained WiFi speed on Pi 3B?
Replies: 1
Views: 796

Re: Sustained WiFi speed on Pi 3B?

Also should note that WiFi CYW43438 chip is only capable of +19 dBm (80 mW ) of Tx power, but iwconfig shows it is +31dBm (> 1 watt). So iwconfig not an accurate indication of Tx power. wlan0 IEEE 802.11 ESSID:"pi45ap" Mode:AdHoc Frequency:2.437 GHz Access Point: B8:27:EB:0C:56:F6 Tx-Power=31 dBm Re...
by mkirk
Wed May 08, 2019 6:29 pm
Forum: Beginners
Topic: Sustained WiFi speed on Pi 3B?
Replies: 1
Views: 796

Sustained WiFi speed on Pi 3B?

We are trying to benchmark Pi 3B WiFi speeds with iperf, iperf3 and nuttcp. Transferring TCP mode with unlimited rate. Running Raspbian Stretch release. 2.4 GHz, channel 6 on-board WiFi in ad-hoc mode (no Access point or router) - on-board chip antenna One Pi 3B is server the other is a client. Test...

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