ADSP-BF533的例程源码18：IO按键控制

/******************************************************** * * 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> #include <sys\exception.h> #include "cpld.h" //#define KEY_INT_ENABLE EX_INTERRUPT_HANDLER(FlagA_ISR); 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_Flags(void) { *pFIO_INEN = 0x0001; *pFIO_DIR = 0x0000; *pFIO_EDGE = 0x0001; *pFIO_POLAR = 0x0001; *pFIO_MASKA_D = 0x0001; } void Init_Interrupts(void) { *pSIC_IAR0 = 0xffffffff; *pSIC_IAR1 = 0xffffffff; *pSIC_IAR2 = 0xffff5fff; register_handler(ik_ivg12, FlagA_ISR); *pSIC_IMASK = 0x00080000; } EX_INTERRUPT_HANDLER(FlagA_ISR) { unsigned char interrupt=0; unsigned char keydata; if(~*pINTERRUPT_DAT & KEY_INT) { keydata = ~*pKEYBOARD_DAT; //读键值 switch(keydata) { case LUK: printf("The key is left->up\n\r"); break; case LLK: printf("The key is left->left\n\r"); break; case LDK: printf("The key is left->down\n\r"); break; case LRK: printf("The key is left->right\n\r"); break; case RUK: printf("The key is right->up\n\r"); break; case RLK: printf("The key is right->left\n\r"); break; case RDK: printf("The key is right->down\n\r"); break; case RRK: printf("The key is right->right\n\r"); break; default: } } *pFIO_FLAG_C = 0x0001; } void main(void) { Set_PLL(16,4); Init_EBIU(); printf("Please press the Keyboard!\n"); #ifdef KEY_INT_ENABLE Init_Interrupts(); ExtIO_Interrupt_Enable(); Interrupt_Enable(); Init_Flags(); #else unsigned char keydata; while(1) { keydata = ~*pKEYBOARD_DAT; //读键值 if(keydata & LUK) printf("The key is left->up\n\r"); if(keydata & LLK) printf("The key is left->left\n\r"); if(keydata & LDK) printf("The key is left->down\n\r"); if(keydata & LRK) printf("The key is left->right\n\r"); if(keydata & RUK) printf("The key is right->up\n\r"); if(keydata & RLK) printf("The key is right->left\n\r"); if(keydata & RDK) printf("The key is right->down\n\r"); if(keydata & RRK) printf("The key is right->right\n\r"); } #endif while(1); }