1. EMBEDDED SYSTEM SOFTWARE AND RTOS BASICS DIAGRAMS
Embedded Systems Software Training Center
EMBEDDED SYSTEM SOFTWARE AND RTOS BASICS DIAGRAMS

2. Software embedded in an equipment and in LSI
DSP – Digital Signal Processor
LSI – Large Scale Integration

3. Breakdown of the total development cost in the operating department
The cost of software development accounts for 40% of total development costs.

4. Types of targeted processors
The 32 bits era

5. Programming languages
Mainstream is C language

6. Processor Basics RF CPU MCU SoC Peripherals Control Unit transceiver
Memory
Peripherals
Control Unit RF
ALU
transceiver
Registers
Bus
CPU
MCU
SoC

7. Processor Register Set of M16C
2 banks of general-purpose registers
4 16-bit data registers R0 - R3
Upper and lower bytes of registers R0 and R1 can be used as 8-bit registers (R0L, R0H, R1L, R1H)
2 16-bit address registers A0 & A1
Can access pairs of registers as 32-bit registers: R2R0, R3R1, A1A0
Bank 0
Data register
Bank 1 PC
Program Counter R0
データレジスタ
アドレスレジスタ
Frame base register R0 R1 R2 R3 A0 A1 FB
R0H
R0H
R0L
INTB
Interrupt table register R1
R1H
R1L R2 R3
Address register
USP
User Stack Pointer A0
ISP
Interrupt Stack Pointer A1 SB
Static base register
Frame base register FB
FLG
Flag register
Copyright © 2011 DSR Corporation

8. Bus Slave Selection Port enable (chip select)
Only one slave device is active and accepts requests from the bus
Decode address: get the most significant bits of the address
Memory Map
Port enable
0x0000
Memory 1
Master
Slave
Slave
0x4000
Memory 2
CPU
Memory 1
Memory 2
0x8000 EN EN
Address Decoder
“00” active
0x1000 :
0x2000 :
0x4000 :
0x5000 :
The upper 2 bits
Chip Select
“01” active
Address signal
16-bit
Copyright © 2011 DSR Corporation

9. References Embedded systems:
Raj Kamal, “Embedded Systems: Architecture, Programming and Design – 2ed”
Christof Ebert, Jurgen Salecker, “Embedded Software-Technologies and Trends”
Steve Heath, “Embedded Systems Design - 2ed”
Michael Barr; Anthony J. Massa, “Programming embedded systems: with C and GNU development tools”
System and local bus.
M16C/60, M16C/20, M16C/Tiny Software Manual
M16C/60, M16C/20, M16C/Tiny Hardware Manual
Copyright © 2011 DSR Corporation 9 9