AN3029 datasheet(21/42 Pages) STMICROELECTRONICS

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AN3029

STM8 development tools

Typically, the following tools are needed to get started:

•

STVD for integrated development environment

•

STM8 C compiler (from Cosmic, Raisonance, or IAR)

•

ST toolset and STM8 firmware library from STMicroelectronics

STM8L101xx standard peripheral library,

STM8L05x/STM8L15x/STM8L16x/STM8AL31x/STM8AL3Lx standard peripheral

library

•

STM8 evaluation board from STMicroelectronics (STM8L101-EVAL for STM8L101xx,

STM8L1526-EVAL for medium density STM8L15xxx and STM8AL31xx/STM8AL3Lxx,

and STM8L1528-EVAL for high density STM8L15xxx/STM8L162xx)

•

If you use STM8L101-EVAL, you also need the HW SWIM debug interface "Rlink" from

Raisonance and ST-Link or STice-SWIM. The debug interface ST-LINK is included in

STM8L1526-EVAL and STM8L1528-EVAL.

•

STM8L-DISCOVERY

8.1

Single wire interface module (SWIM)

8.1.1

SWIM overview

In-circuit debugging mode or in-circuit programming mode are managed through a single

wire hardware interface based on an open-drain line, featuring ultra fast memory

programming. Coupled with an in-circuit debugging module, the SWIM also offers a non-

intrusive read/write to RAM and peripherals. This makes the in-circuit debugger extremely

powerful and close in performance to a full-featured emulator.

The SWIM pin can be used as a standard I/O (with 8 mA capability) which has some

restrictions if the user wants to use it for debugging. The most secure way to use it is to

provide a strap option on the PCB. Please refer to the STM8 SWIM communication protocol

and debug module user manual (UM0470) for more SWIM protocol details.

Figure 11. Debug system block diagram

MS32527V1

SWIM entry

Internal RC

Comm

layer

CMD

decode

STM8

core

Peripheral

NVM

RAM

DBG

100 KHz Osc

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