The G400 is an awesome module and way faster than the G120 but it lacks USER FLASH memory compared to the G120. This is a shame as it has the potential to take big software designs. My current design is at 1MB already and I still have heaps of coding to do so concerned I will run out of space with the limited 1.4MB that it comes with.
For the GHI guys, what would it take to increase the USER FLASH to the same as the G120 or possibly higher. Could this device not get something like 4MB of flash as I am sure that there is enough RAM to support this?
The issue is in deployment and updating. I need to be able to do OTA IFU with this unit so this would mean I need to update the SPI flash as part of the process.
It would be better if this was all part of the GHI G400 itself. I can’t understand why the G120 has almost double the available FLASH than the G400 which offers far more computing power. Actually they both have 4MB but I guess the G400’s firmware takes up far more than the G120 for the same flash? It’s like buying a 3.2GHz processor and only having 8GB or memory but the 1.7GHz option can do 16GB.
If you run a system with an LCD it is very easy to run into memory issues with BITMAPS and other graphics primitives. This is why I like the G400 because it has enough power to give good graphics performance compared to the G120 which is quite slow, although it works but that 1.4MB is really small for the potential that this processor can offer. The performance increase with the 400Mhz from 120Mhz makes a big difference and you get a nice smooth feel from using it. My client really likes it but I feel that the 50 units he wants may not be enough to have justification on increasing the memory.
When I talk about USER FLASH, I mean the memory that is used when you build your programme and deploy it. The memory that this is stored in.
I have an SD card that is used to log data but the issue is that the GUI will be really bad if the graphics are not loaded if there is a failure of the SD card in any way. I will look at this idea as I have about 400KB of images for this system. The issue then is how do I update these as part of the IFU? I would need additional code in the main programme to look for images on the USB or to be downloaded, depending on which method was used to update the firmware. Having it all in the DEPLOYMENT is much better.