The ultimate success of an embedded system project depends both on its software and hardware.
Image source: http://www.loudon-engineering.com/firmware-design
Let's see software, more specifically firmware architecture and design steps we follows at Inditronics :
1. Identify the requirements -
Before we can begin to architect an embedded system or its firmware, we must have clear requirements. Properly written requirements define the WHAT of a product.
2. Selection of elements -
Select below elements according to identified product requirements.
Processor platforms - ARM Cores, Microchip PIC series, Atmel AVR series, Intel 8051, STM8/32 series etc
Language - C, C++, Java, Python etc
OS - Linux, Android, Windows etc
Hardware device drivers and communication protocols - Serial NOR Flash and Flash File Systems, GPS processing, Bluetooth, GSM / CDMA / LTE cellular communications, I2C, SPI, USART, USB etc.
Development tools - Keil C Compiler, Rowley Crossworks, IAR Workbench, Microchip MPLAB, ST Visual Developer etc
In-circuit emulation tools - JTAG, ST-Link, Microchip MPLAB ICD etc
3. The Design -
A. Configure firmware components
Coding finite length firmware
Analyze and expose memory cost
Coding FW with memory costs
Run time budget
Coding cycle accurate FW
Relocatable assembly coding
B. Microprocessor design :
Design the Datapath
Instruction set design
Build Control Logic
Design the Address Path
4. Design for test -
5. Porting and Testing
Do the interfaces and connections. Generate and verify the machine code. Port the programs into device and test the embedded system.
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