Preface
When learning STM32, beginners are easily fooled by the crystal oscillator. To develop on a new platform, you must first get the crystal oscillator right.
for example
The crystal oscillator in the SensorNode example is 12MHz, while SK and the other one are both 16MHz. The following example explains how to adjust it to 16MHz and how to set the crystal oscillator.
\src\boards\SensorNode\cmsis\stm32l1xx_hal_conf.h
#if !defined (HSE_VALUE)
//#define HSE_VALUE ((uint32_t)12000000) /*!< Value of the External oscillator in Hz /
#define HSE_VALUE ((uint32_t)16000000) /!< Value of the External oscillator in Hz */
#endif
\src\boards\SensorNode\board.c
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6; //RCC_PLL_MUL8
1
2
MDK Project setting
Option for Target: Xtal: 12MHz -> 16MHz
End
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