H8/3857

AI-generated Summary: The document explains how to register and uninstall Call Walker within the High-performance Embedded Workshop (HEW). It guides users to launch HEW without opening a workspace, access the Tools Administration menu, and register the Call Walker tool by specifying the registration file path. After registration, Call Walker version 2.3 appears in the menu. Upon uninstalling HEW, users must manually delete the remaining Call Walker directory. It also provides Renesas Electronics website and contact information for support. The revision history notes the first edition release date.

AI-generated Summary: Call Walker is a stack information analysis tool included in the Renesas Compiler Package for various microcontroller families. It reads stack information files (*.sni) generated by the linkage editor or profile information files (*.pro) from the simulator debugger. Users can edit stack sizes, save modified data in call information files (*.cal), and merge multiple files. Procedures to create stack information files differ by microcontroller family, with specific instructions for SuperH, H8, RX, M16C, and R8C families. The tool supports static stack size display and editing for assembly programs.

AI-generated Summary: The document provides example C code for initializing and configuring the RTC and LCD controller of the H8/38076F microcontroller. It details the hardware description, focusing on the RTC's functionality, registers, and initialization procedure. The RTC counts time from seconds to a week, supports BCD-coded read/write, and generates interrupts. It also explains the importance of checking the BSY bit during register updates to ensure accurate data reading.

AI-generated Summary: This document provides example C code for initializing and configuring Timer A, the LCD controller, and implementing an IIC interface using a standard IO port on the H8/38024F microcontroller. It includes code to generate interrupts every second, control a 7-segment LCD display, create a software real-time clock, and communicate with external EEPROM and RTC devices via software IIC. The development environment setup and device block diagram are also detailed.

AI-generated Summary: The document explains how to use the H8/38602 microcontroller in low power applications by switching between watch mode and subactive mode to perform A/D conversions. It details the development environment involving HEW4 IDE, MB-H838602 board, and E8 debugger. The program flow includes entering watch mode, waking after about eight seconds to perform six A/D readings, then returning to watch mode. The setup uses Timer B as a reload timer to trigger wake-up interrupts.

AI-generated Summary: The document explains two methods to efficiently rotate 8-bit data between MSB-first and LSB-first formats for serial communication. The traditional method involves bit-by-bit copying and repositioning, while the faster method uses a lookup table containing pre-rotated values indexed by the original data. This approach reduces processing time by avoiding bitwise operations during runtime.

AI-generated Summary: A Perl script converts S-record data into a C structure, enabling flash programming routines where code runs from RAM but is stored in flash memory. Unlike the Win32 utility 'motice_cl', this script offers cross-platform compatibility and customizable output formatting. It runs on Windows and Linux with Perl implementations and integrates into the Renesas HEW IDE as a build phase. The script generates a C structure with start address, data length, and data array fields, adaptable to the input S-record size.

AI-generated Summary: Renesas SH and H8 Flash microcontrollers support self-programming via a built-in bootloader called boot mode, which programs devices through a specified serial channel. User boot mode allows running a custom bootloader from a separate 8kB Flash section mapped at address zero, simplifying custom Flash programming. This note demonstrates implementing a serial Flash bootloader using the Xmodem protocol on H8/3069F and SH7058F devices, with source code available. The bootloader operates via SCI channel 1 at 57600 baud, providing menu options for erasing and programming Flash memory.

AI-generated Summary: Renesas Flash microcontrollers support three programming modes: PROM, boot, and user. PROM mode uses an external programmer with high speed but limited field use. Boot mode allows in-circuit programming by downloading routines into internal RAM, erasing Flash memory each time. The 0.18µm devices add a user boot mode, enabling a programmable bootloader area. User mode offers flexible in-field reprogramming by running routines from RAM or external memory, supporting partial erasing and various data interfaces. Flash memory must not be accessed during erase/program operations, requiring code execution from RAM or external memory with interrupts disabled.