RX, HEW

embOS for RENESAS RX was developed for and with RENESAS HEW compiler and supports all data memory models offered by this compiler.
embOS for RX comes with an easy to use start project for an RX610 CPU which may be used with the HEW.
Software development and debugging with E20 emulator as well as using the simulator is supported.

Resources and performance data

Memory usage
Kernel size (ROM)	approx. 1500 bytes
Kernel RAM usage	63 bytes
RAM usage per task control block	20 bytes
RAM usage per resource semaphore	16 bytes
RAM usage per counting semaphore	8 bytes
RAM usage per mailbox	24 bytes
RAM usage per software timer	20 bytes
RAM usage event	0 bytes
Min. stack-size per task (RAM)	56 bytes
Timing
Context switch time	236 clock cycles (2.3 µs), independent of number of tasks
Interrupt latency time	max. 90 clock cycles (0.9 µs)
Kernel CPU usage/TICK	less than .1% of total calculation time at 1000 Interrupts/second (1ms TICK)
Basic time unit (TICK)	typ. 1 ms, min. 10 µs (100 kHz interrupt frequency)
Features
Max. no. of tasks	Unlimited (by available RAM only)
Max. no. of mailboxes	unlimited (by available RAM only)
Max. no. of semaphores (resource/binary/counting)	unlimited (by available RAM only)
Max. no. of software timers	unlimited (by available RAM only)
Max. no. of priorities	255
Stack size idle task (RAM)	0(no memory needed)
Nested interrupts	permitted
Task switches from within ISR	possible

Absolute data given above were measured with embOS x-release build on an RX610 CPU running at 100MHz.

embOSView offers system analysis during runtime

Available Emulators

• RENESAS E20
• J-Link RX

Additional information

RENESAS Web site for additional CPU info / support

 

Board support packages

embOS comes with lots of ready to go start projects and support packages for various Renesas RX CPUs and starterboards.

CPU	Eval board
Renesas RX210	Renesas RPBRX210
Renesas RX210	Renesas RSKRX210
Renesas RX62N	Renesas RPBRX62N
Renesas RX62N	Future Designs YRDKRX62N
Renesas RX62N	Renesas RSKRX62N
Renesas RX610	Renesas RSKRX610
Renesas RX630	Renesas RSKRX630
Renesas RX63N	Future Designs YRDKRX63N

 

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Release notes for embOS Version 3.84c for RX using Renesas compiler and HEW

1. Tool chain used for build
2. New features
3. Improvements
4. Program corrections
5. Known problems/limitations
6. Release history
7. Miscellaneous

Tool chain used for build

The following tools have been used:

Compiler:  RENESAS CCRX    V.1.01.00.001
Assembler: RENESAS ASRX    V.1.01.00.000
Librarian: RENESAS OPTLNK  V.10.01.00.000
Workbench: RENESAS HEW RX  V4.08.00.011

Performance

1. Task switch time
   2.3 us, 236 CPU cycles
2. Interrupt latency, low priority interrupt
   0.9 us, 90 CPU cycles.
3. Interrupt latency, high priority (zero latency) interrupt
   zero, no additional latency introduced by embOS.

Timings were measured on an RX610 device running at 100 MHz.

New features

Version 3.84c

1. Update to latest embOS generic sources V3.84c.

Version 3.82x

1. Update to latest embOS generic sources.
2. BSP for RPBRX210, RSKRX630 and YRDKRX63N added.

Version 3.82v1

1. OS_Endian.Src to BSP for RSKRX210 added.
   This file sets explicitly the endian bits in flash.

Version 3.82v

1. Update to latest embOS generic sources.
2. All BSP uses now the compare match timer for system tick generation.

Version 3.82u

1. Update to latest embOS generic sources.
2. BSP for RSKRX210 added.

Version 3.82n

1. Update to latest embOS generic sources.
2. BSP for RPBRX62N added.

Version 3.82i

1. Update to latest embOS generic sources.
2. BSP for RSKRX62N and YRDKRX62N added.

Version 3.82b

1. Support for 16 interrupt priority levels added.
   Future devices of the RX600 familiy will support 16 interrupt priority levels.
   The initial version was built for RX610 devices which support 8 interrupt priority levels.
   The version 3.82b of embOS will support interrupt priority levels from 0 to 15 and can be used for all RX devices.

Version 3.82a

1. Initial version
   Version 3.82a is the initial version of embOS RX for HEW. It is based on embOS sources V3.82a

Improvements

Version 3.82a

1. NONE
   Initial version based on embOS sources version 3.82a

Program corrections

Version 3.82v1

1. OS_GetTime_Cycles() and OS_ConvertCycles2us() in RTOSInit.c corrected.

Version 3.82v

1. Big endian support corrected.
   The SFR definitions in Rtosinit.c did not work correctly with big endian and high optimization settings.

Version 3.82n

1. Queue handling corrected.

Version 3.82a

1. NONE
   Initial version based on embOS sources version 3.82a

Known problems/limitations

Version 3.82a

1. NONE
   Initial version based on embOS sources version 3.82a

Release history

Version	Release date	Short explanation
V3.84c	19. Jan 2012	Update to latest embOS generic sources.
V3.82x	13. Sep 2011	Update to latest embOS generic sources and BSPs added.
V3.82v1	03. Aug 2011	RTOSInit.c corrected. OS_Endian.Src to BSP for RSKRX210 added.
V3.82v	25. Jul 2011	Update to latest embOS generic sources. All BSP uses now compare match timer for systick generation. Big endian support corrected.
V3.82u	16. Jun 2011	Update to latest embOS generic sources and BSP added.
V3.82n	13. Dec 2010	Update to latest embOS generic sources and BSP added.
V3.82i	19. Aug 2010	Update to latest embOS generic sources and BSPs added.
V3.82b	2. Nov 2009	Support for 16 interrupt priority levels added.
V3.82a	22. Oct 2009	Initial version

Miscellaneous

This document was first released with version 3.82a of the software.
Software released earlier is documented internally. This information is available at request.