STM32 JNTRST JTDI JTDO pins are used as normal IO method-EEWORLD

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When STM32 starts by default, the three pins PB4, PB3, and PA15 are not ordinary IOs, but JTAG multiplexing functions, namely JNTRST, JTDI, and JTDO.

When we try to use the SWD interface to debug the simulation, these three pins can be used as normal IO.

The specific method is to disable the JTAG function. Just use the following statement.

#define GPIO_Remap_SWJ_JTAGDisable ((uint32_t)0x00300200) /*!< JTAG-DP Disabled and SW-DP Enabled */

GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); /*Enable SWD and disable JTAG*/

Keywords：STM32 Reference address：STM32 JNTRST JTDI JTDO pins are used as normal IO method

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