Renesas Solution Starter Kit for RX23E-A: build and run the Load Cell application

RE: Renesas Solution Starter Kit for RX23E-A: build and run the Load Cell application

Jan Cumps — Mon, 17 Jul 2023 15:44:59 GMT

I attached an updated version of the GCC toolchain port. The linker script is a little simpler, and I corrected an issue when loading the binary with the Flash Programmer.
All changes are in that linker/loader script. No source code changes.

RE: Renesas Solution Starter Kit for RX23E-A: build and run the Load Cell application

Jan Cumps — Sun, 16 Jul 2023 15:14:32 GMT

I added a port of the project from Renesas' RX-CC to the GCC toolchain. It may come in handy when the trial license has expired.

All code ported nicely, except a few tricky ones:

it used a Renesas toolchain specific NOP instruction. Check src/port/machine.h for the GCC compatible version. No changes to the project files
linker file had to be adapted to get DMA buffers correctly aligned. Check src/linker_script.ld. I took memory from the RAM region and created a DMA region, with 2 aligned sections for the serial comms read and write DMA buffers
main file adapted because the Renesas and GCC method to place variables in memory sections isn't the same. Check the declaration of the s_send_ary and

s_recv_ary.

The e² studio project is attached at the end of the post, and includes the .mot file that can be loaded to the board with Renesas' flash software. No debugger needed.

RE: Renesas Solution Starter Kit for RX23E-A: build and run the Load Cell application

scottiebabe — Sun, 16 Jul 2023 13:48:57 GMT

RE: Renesas Solution Starter Kit for RX23E-A: build and run the Load Cell application

shabaz — Sun, 16 Jul 2023 00:19:47 GMT

Hi Jan,

Interesting experiment! Vey convenient mounting under the desk too. It seems there's very little noise on the measurement.

Here the weather had extremely strong winds today, and a neighbour's tree completely broke, landing on their fence which also then broke.

My trees are holding up fine but I don't know for how long : )

After reading your blog, It sounds like a very neat IoT project actually - microcontroller with high-res ADC and a couple of load cells or other strain gauge setup to monitor a tree in real-time during bad weather conditions!