ADSP-BF533的例程源码3：GPIO OUT驱动源码

/******************************************************** * * 北京四维卓信电子有限公司 * http://www.openadsp.com * * 【OpenADSP开源社区】 * http://www.openadsp.com/bbs/ * ********************************************************/ #include <cdefBF533.h> #define pDEVICE_OE (volatile unsigned short *)0x20320000 #define PF0_SET 0x40 void Set_PLL(unsigned int pmsel,unsigned int pssel) { unsigned int new_PLL_CTL; *pPLL_DIV = pssel; asm("ssync;"); new_PLL_CTL = (pmsel & 0x3f) << 9; *pSIC_IWR |= 0xffffffff; if (new_PLL_CTL != *pPLL_CTL) { *pPLL_CTL = new_PLL_CTL; asm("ssync;"); asm("idle;"); } } void Init_EBIU(void) { *pEBIU_AMBCTL0 = 0x7bb07bb0; *pEBIU_AMBCTL1 = 0xffc07bb0; *pEBIU_AMGCTL = 0x000f; } void Init_SDRAM(void) { *pEBIU_SDRRC = 0x00000817; *pEBIU_SDBCTL = 0x00000013; *pEBIU_SDGCTL = 0x0091998d; ssync(); } void Init_PF0_OUT(void) { *pFIO_DIR |= PF0; } void Set_CPLD(void) { *pDEVICE_OE &= ~PF0_SET ; //设置CPLD释放PF0接口 } void main(void) { int i; Set_PLL(16,4); Init_EBIU(); Init_SDRAM(); Set_CPLD(); Init_PF0_OUT(); while(1) { *pFIO_FLAG_S |= PF0; //PF0脚置高 *pFIO_FLAG_C |= PF0; //PF0脚置低 *pFIO_FLAG_D |= PF0; //PF0脚置高 *pFIO_FLAG_D &= ~PF0; //PF0脚置低 } }