defragster
Senior Member+
Larger bottom footprint will hold a QSPI capable FLASH like the Audio board - see "Optional Memory Chip(s)". The one seen and used is : 16 MB - IC FLASH 128M SPI 133MHZ 8SOIC
Larger bottom footprint will hold a QSPI capable FLASH like the Audio board - see "Optional Memory Chip(s)". The one seen and used is : 16 MB - IC FLASH 128M SPI 133MHZ 8SOIC
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Note, I believe the psram is not persistent memory, while the flash is persistent. I tend to view the psram as being the place to put large things like display buffers, while due to its persistent memory, the flash is perhaps better used like a sd-card with a file system emulation built on top. When I used the function to erase memory, the psram came back almost immediately, while the flash took about 25 seconds.
This flash chip works for me. It is the same flash chip that can be soldered to the audio shields, and it gives 16 megabytes (or 128 megabits) of persistent flash memory:
16 MB is not bad at all.
Any tips about soldering those SOIC chips on the underside of the Teensy? Never tried to solder SOICs.
Found the problem and just committed a fix for this.
06:16:29.461450 IP 192.168.1.113.8888 > 192.168.1.4.5001: Flags [S], seq 4416001, win 5840, options [mss 1460,wscale 0,eol], length 0
06:16:29.461485 IP 192.168.1.4.5001 > 192.168.1.113.8888: Flags [R.], seq 1477920147, ack 4224001, win 0, length 0
06:16:34.462502 IP 192.168.1.113.8888 > 192.168.1.4.5001: Flags [S], seq 5120001, win 5840, options [mss 1460,wscale 0,eol], length 0
06:16:34.462538 IP 192.168.1.4.5001 > 192.168.1.113.8888: Flags [R.], seq 1477920147, ack 4928001, win 0, length 0
06:16:39.468200 ARP, Request who-has 192.168.1.113 tell 192.168.1.4, length 28
06:16:39.468291 ARP, Reply 192.168.1.113 is-at 0a:1b:3c:4d:5e:6f, length 46
16 MB is not bad at all.
Any tips about soldering those SOIC chips on the underside of the Teensy? Never tried to solder SOICs.
Ok all. Since its safe to post pictures now going to post a pic of a RA8876 on a new breakout board I am planning on using for display tests. Has room for a ILI94 88 and a ILI9431 (both on are SPI1 but with different DC/RST/CS pins - NICE WORK KURT!). One has a tristate buffer. Also has room for a Adafruit 320x240 ST7789 and I threw on there room for a QWIIC adapter board for the heck of it: This shows one of the versatilities of the T4.1 since you don't have to play with underside pins
View attachment 20064
Tested the T4.1 prototype with my stepper motor drivers and libraries yesterday, all works fine.
Also got my PJRC order in for a couple of production T4.1s and memory chips!
Don
8 Mbyte Flash (64K reserved for recovery & EEPROM emulation)
2 chips Plus Program Memory
8 Serial ports
I'm doing simple regression testing with a dozen or so of my lab setups, just to make sure interfaces and all look good. I just tested the BNO080 IMU with the Sparkfun lib over I2C, all looks good to me. Here's and example of the PRY output, Exp 17 in the lib.
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
-0.7,1.3,-124.4
Ok Don you inspired me to hook my BNO080 back up and merge it with the openGL 3D model of a Steampunk Blimp I got on line for testing. Works pretty good. Using defaults from the BNO080 library examples.
Just pushed a couple updates plus the sketch with the BNO080 to GitHub: https://github.com/mjs513/TeensyOpenGL_t4That's cool @mjs513 - have you got that code re-shared anywhere?
"Everyone on this list who does not receive a pre-production board will be offered a free Teensy 4.1" I was lucky enough to be on the list, do I need to email PJRC to get one?
When the Teensy 4.0 was release it was only 2 per customer.