BDMA.zip_BDMA_VDSP_dma_字节内存

/* This program Writes the 10 data bytes into the Byte memory from the array data_array & also reads the same data from the byte memory and stores it in retrive_array of internal data memory. Both writing in Byte memory & Reading from the byte memory can be simulated in the VDSP. But only Reading from byte memory can be checked using the 2189 EZ-KIT. Because writing in to Flash memory needs unlocking & locking of the flash memory using some control words. */ #include"signal.h" #include"sysreg.h" #define BDMA_Word_Count *(int *) 0x3fe4 #define BDMA_Control *(int *) 0x3fe3 #define BDMA_External_Address *(int *) 0x3fe2 #define BDMA_Internal_Address *(int *) 0x3fe1 #define Prog_Flag_Comp_Sel_Ctrl *(int *) 0x3fe6 volatile int dm data_array[10]={1,2,3,4,5,6,7,8,10}; int dm Received_Data[10]; volatile int flag=0; void BDMA_ISR(); void main() { interrupt(SIGBDMA,BDMA_ISR); BDMA_Control= 0x00007; /* BMPAGE=00000000 BMOVLAY=0000 BCR=0 RUN DURING BDMA BDIR=1 STORE TO BM BYTPE= 11 INTERNAL M/M 8 BITS LSB ALLIGNMENT */ BDMA_External_Address=0x00000; BDMA_Internal_Address=&data_array; Prog_Flag_Comp_Sel_Ctrl=0x2000; // 2 wait cycles BDMA_Word_Count=10; // Transmit 10 words while(flag==0) { } BDMA_Control= 0x0003; /* BMPAGE=00000000 BMOVLAY=0000 BCR=0 RUN DURING BDMA BDIR=0 LOAD FROM BM BYTPE= 11 INTERNAL M/M 8 BITS LSB ALLIGNMENT*/ BDMA_External_Address=0x00000; BDMA_Internal_Address=&Received_Data; Prog_Flag_Comp_Sel_Ctrl=0x2000; // 2 wait cycles BDMA_Word_Count=10; // Transmit 10 words enable_interrupts(); asm("idle;"); // wait for BDMA interrupt } void BDMA_ISR( ) { flag=1; }