AN2078 查看數據表（PDF） - STMicroelectronics

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AN2078

STR7 In-Application Programming using UART

STMicroelectronics 

AN2078

2

Running the IAP driver

Running the IAP driver

To run the IAP driver, STR7xx internal Flash must be hardware remapped at address 0x0.

Thus the IAP driver is programmed in Flash bank0 sector0 and the user application in the

remaining memory space in bank0.

2.1

HyperTerminal configuration

The IAP requires a PC running HyperTerminal with the following settings:

Figure 2. COM Port Properties

Note:

2.2

A baud rate value of 115200 bps is used as an example.

Care should be taken when selecting the system clock frequency. Ensure that with the

system clock frequency used in your application, you are able to generate a baud rate equal

to 115200 bps in order to guarantee successful communication via UART.

Triggering execution of the IAP driver

In this application note, depending on the micro eval board, pins connected to push buttons

are used as an example, allowing execution of the IAP driver. By keeping the push button

pressed at reset, the user is able to run the IAP driver to reprogram the STR7xx internal

Flash.

It is not mandatory to use push buttons and the user can simply enter signals on these pins

with respect to their corrsponding active levels. Refer to the table in Section 4 on page 7 for

the correct pins and their active levels for each MCU.

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