feat(rh850): update rh850-u2a16 readme files

Signed-off-by: David Cerdeira <davidmcerdeira@gmail.com>

Author: DavidMCerdeira

platforms/rh850-u2a16/README.md

@@ -4,33 +4,32 @@
 
 You can download and compile the toolchain from the official GCC repository.
 
-A toolchain that has been used and verified is [gcc 10.3.0](https://github.com/dkulacz/gcc-v850-elf-toolchain).
+A toolchain that has been used and verified is [gcc 14.2.0](https://github.com/bao-project/gcc-v850-elf-toolchain/releases/download/v14.2.0/gcc-14.2.0-v850-elf.tar.gz).
 
 
-## 2) Build bao.bin and baremetal.hex
+## 2) Download and install rfp-cli
 
-```sh
-# in bao-demos/
-make
-```
+You can download `rfp-cli` for linux [here](https://www.renesas.com/rfp).
+Add it to your PATH.
 
-The `bao.bin` and `baremetal.hex` is in `wrkdir/imgs/rh850-u2a16/baremetal`
+```
+rfp-cli --version
+Renesas Flash Programmer CLI V1.11
+Module Version: V3.18.00.000
+```
 
+## 3) Build a demo
+For example to build the baremetal demo:
 
-## 3) Flash bao.bin and baremetal.hex to board
+```sh
+export CROSS_COMPILE=v850-elf-
+export DEMO=baremetal
+export PLATFORM=rh850-u2a16
 
-You can use a programming tool to program these two files onto the development board. 
+make
+```
 
-For example, on macOS, the steps are as follows:
+## 4) Flash bao.bin and guests to board
 
-```sh
-./rfp-cli -d RH850/U2x -t e2 -if uart \
--auth id FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF \
--auto -osc 20.0 \
--bin 0 bao.bin -p
-
-./rfp-cli -device RH850/U2x -tool e2 -if uart \
--auth id FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF \
--osc 20.0 \      
--file baremetal.hex -p
-```
+You must use the `rfp-cli` tool to program the `bao.bin` and guest images.
+Please take a look at the corresponding demo instructions for this platform.

platforms/rh850-u2a16/baremetal.md

@@ -0,0 +1,25 @@
+# RH850-U2A16 berametal DEMO
+After building the demo follow these steps.
+
+<!--- instruction#1 -->
+## Generate baremetal HEX file
+
+```
+${CROSS_COMPILE}objcopy -O ihex ${BAO_DEMOS_WRKDIR_SRC}/baremetal/build/${PLATFORM}/baremetal.elf ${BAO_DEMOS_WRKDIR_IMGS}/baremetal.hex
+```
+
+<!--- instruction#2 -->
+## Flash the guest and bao binaries
+
+```
+rfp-cli -device RH850/U2x -tool e2 \
+    -osc 40.0 \
+    -auth id FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF \
+    -program -file $BAO_DEMOS_WRKDIR_IMGS/baremetal.hex
+
+rfp-cli -device RH850/U2x -tool e2 \
+    -osc 40.0 \
+    -auth id FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF \
+    -program -bin 0x0 $BAO_DEMOS_WRKDIR_IMGS/bao.bin -run
+```
+<!--- instruction#end -->

platforms/rh850-u2a16/make.mk

@@ -1,4 +1,7 @@
 ARCH:=rh850
 
-platform: 
-	$(CROSS_COMPILE)objcopy -I binary -O ihex --change-addresses 0x7F0000 $(wrkdir_demo_imgs)/$(DEMO).bin $(wrkdir_demo_imgs)/$(DEMO).hex
+instuctions:=$(bao_demos)/platforms/$(PLATFORM)/$(DEMO).md
+
+platform: $(bao_image)
+	$(call print-instructions, $(instuctions), 1, false)
+	$(call print-instructions, $(instuctions), 2, true)