CC2541,外部晶振失败后，如何重启外部晶振

外部32.768khz晶振因焊接问题，导致外部晶振失效，重新焊好之后发现单片机并没有重新使用外部晶振，是否是进入了内部晶振模式？如何恢复呢？

非常感谢！

Susan Yang：

// set 32kHz OSC and wait until it is stable
#define SET_32KHZ_OSC() \
{\CLKCONCMD = (CLKCONCMD & ~0x80) | OSC_32KHZ;\while ( (CLKCONSTA & 0x80) != OSC_32KHZ );\
}

默认是使用外部的32k晶振的，您可以重新烧录程序试试。

Butterfly：

#define BV(n) (1 << (n))

#define XOSC_STB BV(6) /* XOSC: powered, stable=1 */#define HFRC_STB BV(5) /* HFRCOSC: powered, stable=1 *//* CLKCONCMD bit definitions */#define OSC BV(6)#define TICKSPD(x) (x << 3)#define CLKSPD(x) (x << 0)#define CLKCONCMD_32MHZ (0)#define CLKCONCMD_16MHZ (CLKSPD(1) | TICKSPD(1) | OSC)#define OSC_PD BV(2) /* Idle Osc: powered down=1 */

#define EXTERNAL_CRYSTAL_OSC 0x00 // external 32kHz XOSC#define INTERNAL_RC_OSC 0x80 // internal 32kHz RCOSC

// For non-USB, assume external, unless an internal crystal is explicitly indicated.#define XOSC32K_INSTALLED TRUE //FALSE TRUE#if !defined (XOSC32K_INSTALLED) || (defined (XOSC32K_INSTALLED) && (XOSC32K_INSTALLED == TRUE))#define OSC_32KHZ EXTERNAL_CRYSTAL_OSC #else#define OSC_32KHZ INTERNAL_RC_OSC #endif

//START_HSOSC_XOSCSLEEPCMD &= ~OSC_PD; /* start 16MHz RCOSC & 32MHz XOSC */while (!(SLEEPSTA & XOSC_STB)); /* wait for stable 32MHz XOSC *///SET_OSC_TO_HSOSCCLKCONCMD = (CLKCONCMD & 0x80) | CLKCONCMD_16MHZ;while ( (CLKCONSTA & ~0x80) != CLKCONCMD_16MHZ );//SET_32KHZ_OSCCLKCONCMD = (CLKCONCMD & ~0x80) | OSC_32KHZ;while ( (CLKCONSTA & 0x80) != OSC_32KHZ );//SET_OSC_TO_XOSCCLKCONCMD = (CLKCONCMD & 0x80) | CLKCONCMD_32MHZ;while ( (CLKCONSTA & ~0x80) != CLKCONCMD_32MHZ );//STOP_HSOSCSLEEPCMD |= OSC_PD; /* stop 16MHz RCOSC */