In System Programming Vs In Application Programming

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Flashing new firmware in the microcontroller can be done in two ways:

1. In System Programming:  The process in which a device can be flashed without removing the chip from the board..

E.g. Flashing the PIC Microcontroller using PICKit

In order to perform ISP operation, the microcontroller is powered up in a special mode: "ISP Mode". ISP mode allows the microcontroller to communicate with an external host device through the serial port such as PC or terminal. Microcontroller receives commands, data over the serial from host, erases and reprograms the code memory.. Once ISP operations has been completed, the device is reconfigured so that it will operate normally the next time it is reset or power removed and reapplied.

Microcontroller by default gets factory shipped by a bootloader. This bootloader will check the state of the pin on boot, and depending on it will either start the user program or will wait for downloading firmware over UART.

2. In Application Programming:  

 Some applications may have a need to erase and program code memory under the control of application. Example: Application may have a need to store calibration information or perhaps need to be able to download new portions of code.

The ability to erase and re-program code memory in the end-user application is "In Application Programming"

Comments

  1. Mateusz Domański15 October 2019 at 10:39

    This comment has been removed by the author.

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  2. Mateusz Domański15 October 2019 at 10:42

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    ReplyDelete
  3. Marineworldaquatics24 July 2022 at 03:29

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    ReplyDelete

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