Hi Michael, Congratulations! You created a really great board!!!
I'm sure that many people here will be interested on it, those who are really interested to contribute. The idea of using RPI form-factor is really good. Actually we were discussing about the idea of creating some RPI-like board to replace high level Linux system with a system running NuttX RTOS. I think adding JTAG for ESP32 and SWD for RP2040 will be very useful, please include it for the final board. A friend of mine created a nice and simple board for NuttX that he released as open-source: https://github.com/lucaszampar/NuttX_STM32F4_RS485_DevBoard He send me some pictures that I put on my flickr: https://live.staticflickr.com/65535/52456145643_97eca8e9b1_o.jpg https://live.staticflickr.com/65535/52455885674_94eba29fcc_b.jpg Soon, he will submit support to mainline. BR, Alan On 10/26/22, michael.sch...@mdc-service.de <michael.sch...@mdc-service.de> wrote: > Dear Nuttx developers, > > we have developed the EsPiff (ESP32+RP2040 on the Raspberry Pi Form > Factor), a open source board to replace RasPi's and there clones, where > the high processing power and/or Linux is not needed, but stability and > the reuse of RasPi HATs are required. > > The github home is https://github.com/MDCservice/EsPiFF > > We will also offer the EsPiFF on CrowdSupply > https://www.crowdsupply.com/mdc-service-wittenburg-gmbh/espiff > > We would like to send a few boards for free to Nuttx developers, to > improve Nuttx compatibility. Would there be interest? > > A high level summary about the EsPiFF: > An ESP32-WROVER-I module with 16 MB Flash, 8 MB PSRAM is taking care > - wired Ethernet via a IP101 PHY, > - Wifi (need an external Wifi Antenna with uFL connector), > - 3 serial UARTs, > - one the 3 serial UARTs is used for programming via a CH340 USB-UART > chip, what can be enabled/disabled with jumpers, > - I2C port expander PCA 9557 for some chip select signals and 3 user > LEDs, > - SDcard in SPI mode, > - external real time clock, with supervisior, > - 2kB FRAM, > - USB Type-C connector for up to 5V/3A, connected to the CH340 USB-UART > to program the ESP32 > > An RP2040 (Pi Pico) what takes care the 40 pin RasPi header, > - connected to the ESP32 via SPI, > - UAB-A connector, also used to program the RP2040 (need to hold the > boot button while power the board). > > In earlier versions, we had the LAN8720 PHY, but as others (Olimex, > wESP) we also got problems and replaced it with the IP101 since v3.1. > > Currently, there is no HW debugging broken out on the board. But we > could add a JTAG header on the bottom side, with TDO, TDI, TCK, TMS, > GND, 3V3 in the next board production run. The ESP32 has the JTAG pins > on GPIO12, 13, 14, 15, what are used for SPI on the EsPiFF, so code > using the SPI could not be debugged while JTAG is using the pins. Would > it still make sense to build in the JTAG header? > > Would be glad to get your feedback, > Michael >
