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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Is eXecute In Place dependent on the flash chip?

We are looking at implementing an architecture that makes use of eXecute In Place (XIP) over QSPI in order to overcome storage constraints; our firmware has grown too large to live in the on-chip ...
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98 views

UART - Logic Analyser

So I've been working on getting UART access to the head unit in my car; I've got the schematics of the unit and found that TX3/RX3 on the Renesas SH7750 are presented externally - along with 3 "...
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1answer
50 views

Using a Renesas evaluation board as a Programmer

I am new to using renesas microcontrollers, and could use some advice from someone with experience using them. I found this rl78 evaluation board and a quick reading of the product description on the ...
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41 views

RX63N has NAND or NOR internal flash?

I need to read the internal flash of RX63N MicroController multiple times. It will always be the same data block. I was concerned about the life of the internal flash, wearing out etc. I read that NOR ...
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1answer
353 views

e2 studio undefined reference to 'posix_memalign'

I need some help to solve this error. I am new to use e2 studio of Renesas. I started to import and build a project, which used for GR-Peach board. Then I got this error: My toolchain version is 8.3....
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76 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
72 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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1answer
741 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
151 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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78 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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583 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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3k 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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995 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
1k 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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1k 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
177 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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643 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 ...