When its comes to AVR programming, its rather obvious how to program them, you use an avr programmer. But when it comes to ARM, i havent found anything on what you need to program / how to program arm chips.
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NXP has a serial protocol, and USB mass-storage (simulated filesystem). No need for JTAG.
STLink, LPCLink, JLink, BlackMagicProbe,... there are plenty of programmers. And for SWD/JTAG, there is no distinction between programmers and debug probes.
Jayesh S. wrote: > But when it comes to ARM, i havent > found anything on what you need to program / how to program arm chips. Some chips have a builtin boot-loader: You only need a COM port, for example a USB-to-serial device like ftdi or other brand. Cheap solution, somewhat slower than SWD due to the slower bitrate of a COM port. So, in detail: - The LPC from NXP, programmable with 'FlashMagic'. Use google, FlashMagic is free downloadable and usable. - The STM32Fxxx, programmable with: my own 'STM32Prog', downloadable on www.mikrocontroller.net, subforum 'projekte&code', also with old 'erfos' programmer, also with a piece of software from ST somewhat like 'bootloader demonstrator' or so. - The chips from Nuvoton are somewhat special: they provide on the chip a flash-area of 4K bytes or so (called LDROM), which is outside of the common flash. In this LDROM you can install a bootloader of your own. Nuvoton provides ready made bootloaders, but I do not know, if they are pre-programmed in the chips on delivery. Usually ALL modern Cortex chips are programmable with a suitable JTAG/SWD programming dongle, as there are: Segger's J-Link (VERY expensive!), Segger's J-Link-edu (expensive) and China-clones of them (not expensive, but...) The original Segger parts also program older ARM devices, which have no SWD, but JTAG The Chip-manufacturers (NXP, Nuvoton, ST) use to provide also dongles like ST-Link, Nu-Link etc. - but this devices usually do the job only with chips from the particular company. Finally: using chips with bootloader you only need a cheap standard electronics like a USB to Serial converter, the programming algorithm is published and there are at least some independent programming Apps to do the job. With JTAG/SWD you need special electronics, the programming algorithms are usually not published by the manufacturers and the good programmers are expensive or even VERY expensive. That's it. W.S.
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