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Here is a firmware package that includes the FAT support. You can use that with SPI to connect a SD card. It also support a regular SD card at the SD card pins on the bottom side. But that is still under development. https://hidrive.ionos.com/lnk/P4CAiRPM Teensy 4.0 https://hidrive.ionos.com/lnk/n4C...
I am almost sure that the differences we see are related to the Python dynamic memory management. I ran another test which was provided a while ago by @pythoncoder, which just does arithmetic and a little bit of looping. There, the numbers are consistent over all versions. That matches my observatio...
Generally i do the same: git checkout <hash-value> make clean make BOARD=TEENSY40 -j5 deploy The code size is reported at the end of the build. It is a table like this: Memory region Used Size Region Size %age Used m_flash_config: 512 B 4 KB 12.50% m_ivt: 48 B 4 KB 1.17% m_interrupts: 1 KB 1 KB 100....
- Wed Jun 23, 2021 6:17 am
- Forum: Raspberry Pi microcontroller boards
- Topic: Size of multiple PIO state machines
- Replies: 3
- Views: 436
There are two PIO bloxks. The first four and the second four state machine each share the same 32 word area of these two PIOs. So one optimization would be to put the state machines in the different groups. Unloading a single state machine from the 32 Word area is tricky. What could be achieved is r...
- Wed Jun 23, 2021 6:11 am
- Forum: ESP32 boards
- Topic: SPI is not working with Infineon current sensor TLI4970
- Replies: 1
- Views: 287
Usually the CS active state is a low level. p5.on() sets p5 to a high level. So better use p5.value(0) or p5(0) to set it to a low level, and p5.value(1) or p5(1) for a high level.