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Questions tagged [renesas]

Anything related to Renesas components or technology. Renesas are a major manufacturer of micro-controllers and flash memory parts, as well as analogue and mixed signal components.

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18 views

Writing to external flash on Renesas Super-H 3 (7706) based board

I've been reverse engineering firmware/software that runs on an old Roland sampler. I'm at a point where I'd like to test some changes I've made, but I need to be able to recover in the event I brick ...
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1answer
47 views

Relating RAM usage with stack allocation and random resets in a microcontroller

This might appear to be too much data way too scattered to understand, but I'll make a genuine effort to explain. Controller: R5F111MJ (ROM 256KB, RAM 16KB), RL-78/L1C family. Datasheet can be found ...
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1answer
49 views

Can you speed up debugging in Renesas High Performance Embedded Workshop by not flashing after breakpoint

I am debugging an H8S MCU in Renesas High Performance Embedded Workshop 4 with the attached E10A emulator, and find it's very slow when stepping through code because it keeps reflashing the chip ...
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347 views

Renesas Compiler: KPIT vs GCC-Renesas (CyberThor)

When looking around at Renesas (RL78) compilers, I noticed GCC mentioned a decent amount, but the links are different. Many of the older (<= 2015) URLs point to an India company, KPIT, and is ...
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3answers
141 views

How to handle moving time window event in an embedded software

Edit3: As requested I'm going to be more specific about my issue, previous description is still below A motor must not be activate more than MAX_TIME hours (20hours - consecutive or not) during a ...
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75 views

Handling RFID time response functions in C

I'm developing an embedded app, writen in C, using a M16C/28 uC from Renesas. The app manages two simple task: RFID for detection and reading MIFARE tags. ( Using HW: Mf500 from NXP ). The uC ...
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1answer
437 views

8GB SD cards intermittently overwriting data

I have inherited a custom embedded device which uses an Renesas H8S MCU to store data on an SD card. It does this directly with no filesystem implementing SPI at a low level in firmware written in ...
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2answers
2k views

How to measure CAN_H / CAN_L of a CAN Communication using an oscilloscope?

I'm trying to set a CAN Communication between an MCU (Inside Renesas board that have a CAN interface inside) and CAN Transceiver (Vector CANcase) which is connected to my laptop via USB. I want to ...
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2answers
709 views

Renesas CS+ for CC vs for CA, CX vs e2 studio

I just get started with renesas MCU: RL78 - D1A – R5F10DPJJFB. I went to Renesas website and saw different IDEs: CS+ for CC, CS+ for CA, CX, e2 studio so I would like to ask what is the differences ...
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1answer
957 views

What are the advantages of working with the Renesas M16C microcontroller? [closed]

I know it's the industry standard but what would it add to my simple project? Would it be ok to work with an Arduino for instance? What are the superior features? I went to their official website and ...
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3answers
833 views

Detecting a disconnected analog input

I am working with ADC on MCU SH7147 (Renesas). I have a problem with a sensor as outlined below. How do I detect a disconnect of the sensor cable on the analog input pin on the MCU? I tried to ...
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1answer
172 views

Will Renesas V850ES/Jx3-E support 1 wire protocol (max detect temp/humid sensor)?

I would like to connect the DATA pin of sensor to Digital I/O pin of a microcontroller. I am confused that in the data sheet of the sensor they have mentioned this: MaxDetect 1-wire bus is used for ...
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1answer
610 views

Renesas RL78 SPI Baudrate Change

I am using an Renesas RL78 and SPI to communicated with an SD card. I have the driver working using the single command Baudrate of 400kBaud when sending both commands and data. Of course, this is ...