Clock oscillator config bits

[ldicdican]

GD32F450 has internal oscillators as follows:

Internal 8 MHz factory-trimmed RC and external 4 to 32 MHz crystal oscillator
 Internal 48 MHz RC oscillator
 Internal 28 MHz RC oscillator
 Internal 40 KHz RC calibrated oscillator and external 32.768 KHz crystal oscillators

How can we set on Arduino if I will use external crystal oscillator?

[maxgerhardt]

Arduino on GD32450 is not yet implemented here o_o

https://github.com/CommunityGD32Cores/ArduinoCore-GD32/tree/main/system

If you meant F350, the current default already is HXTAL

ArduinoCore-GD32/system/GD32F3x0_firmware/CMSIS/GD/GD32F3x0/Source/system_gd32f3x0.c

Lines 56 to 68 in c2bfff7

	#if defined (GD32F350)
	//#define __SYSTEM_CLOCK_8M_HXTAL (__HXTAL)
	//#define __SYSTEM_CLOCK_8M_IRC8M (__IRC8M)
	//#define __SYSTEM_CLOCK_72M_PLL_HXTAL (uint32_t)(72000000)
	//#define __SYSTEM_CLOCK_72M_PLL_IRC8M_DIV2 (uint32_t)(72000000)
	//#define __SYSTEM_CLOCK_84M_PLL_HXTAL (uint32_t)(84000000)
	//#define __SYSTEM_CLOCK_84M_PLL_IRC8M_DIV2 (uint32_t)(84000000)
	//#define __SYSTEM_CLOCK_96M_PLL_HXTAL (uint32_t)(96000000)
	//#define __SYSTEM_CLOCK_96M_PLL_IRC8M_DIV2 (uint32_t)(96000000)
	//#define __SYSTEM_CLOCK_96M_PLL_IRC48M_DIV2 (uint32_t)(96000000)
	#define __SYSTEM_CLOCK_108M_PLL_HXTAL (uint32_t)(108000000)
	//#define __SYSTEM_CLOCK_108M_PLL_IRC8M_DIV2 (uint32_t)(108000000)
	#endif /* GD32F350 */

Dynamic change of clock settings via menu selection or build flags is still an open issue per #19

[ldicdican]

Yeah I mean F350, sorry for typo and thanks for directing me on the config file.