October-11th-2019, 06:53 AM
Hi there,
what I can tell you is that netPI RTE 3 supports an 8Kbyte NVRAM that is connected to the I2C1 bus of Raspberry CPU. This ferromagnetic RAM is a memory that can save data non-volatile. But for sure it needs a command sequence over the I2C bus to read from and write to it.
Since for Hilscher CODESYS is a standard user program like Node-RED, or Python or node.js or any other user program you can imagine we cannot examine indeep all the capabilities of all those. If you look to my previous post and my picture post you can see in the device tree list also a I2C network. I don't know which capabilities this one have, but I could imaging that one can program the I2C bus manually with any included CODESYS IC2 driver ... so in theory CODESYS would then be able to read/write to the NVRAM.
About a jitter I can't tell. Since we have an original Raspberry Pi 3B circuit in use this would be more a question of the CODESYS forum and experiences posted there by users. We have not measured it, sorry.
Armin
what I can tell you is that netPI RTE 3 supports an 8Kbyte NVRAM that is connected to the I2C1 bus of Raspberry CPU. This ferromagnetic RAM is a memory that can save data non-volatile. But for sure it needs a command sequence over the I2C bus to read from and write to it.
Since for Hilscher CODESYS is a standard user program like Node-RED, or Python or node.js or any other user program you can imagine we cannot examine indeep all the capabilities of all those. If you look to my previous post and my picture post you can see in the device tree list also a I2C network. I don't know which capabilities this one have, but I could imaging that one can program the I2C bus manually with any included CODESYS IC2 driver ... so in theory CODESYS would then be able to read/write to the NVRAM.
About a jitter I can't tell. Since we have an original Raspberry Pi 3B circuit in use this would be more a question of the CODESYS forum and experiences posted there by users. We have not measured it, sorry.
Armin
„You never fail until you stop trying.“, Albert Einstein (1879 - 1955)
