AD535 | BIOS | Booting | Bootloader | C621 | C6211 | C6415 | C671 | C6711 | C6711DSK | C6713 | CCS | Chassaing | COFF | DAT | DM64 | DM642 | DMA | DSK671 | DSK6711 | EDM | EDMA | EMIF | Emulator | EVM | EVM620 | FFT | FIR | GPIO | Halting | HPI | HWI | IDK | JTAG | LDB | LDH | LDW | Linker | LMS | LOG_printf | Matlab | McBSP | MEM_alloc | MIPS | PCI | PCM3003 | Pipeline | Profiling | QDM | Reset | ROM | RTDX | Sampling | SDRAM | Stack | TEB | THS1206 | TMS320C621 | TMS320C6416 | TMS320C6711 | TMS320C6713 | UART | Vector Table | XBUS | XDS560

Hi all. I am trying to transfer data from PC to DSP throught FIFO using DMA and Interrupt. And I'd like to process this data. On the PC, I used API fuction as the following .. evm6x_write( , , ); .. On the DSP, main() { run_DMA(); // dma setting set_interrupts(); // dma interrupt service routine *(volatile unsigned int *)0x01780018 =3; while(1) { if(INTFlag==1) { for(i=0; i<BufferSize; i++) out_buffer[i]= in_buffer[i]; INTFlag=0; } } } In this code, when DMA interrupt happens, ISR sets INTFLAG 1. in_buffer is the destination address of DMA. So data is transferred to this buffer. That's O.K. My problem!! To process this transferred data, I added some code as the following. while(1) { if(INTFlag==1) { for(i=0; i<BufferSize; i++) out_buffer[i]= in_buffer[i]; for(i=0; i<BufferSize; i++) ext_buffer[i]= out_buffer[i] + 1000; INTFlag=0; } } In this case, right data is transferred in in_buffer, but there is no data in out_buffer. Of course, there is also no data in ext_buffer. I'd like to transfer some data from PC to DSP and process it. Finally I want to save this data in external memory... Some problem in my understanding to use DMA or DSP code?? Any comments help me. thanks

______________________________
Start your Android Ice Cream Sandwich development on TI's AM35x Sitara ARM Cortex-A8 processor today.



(You need to be a member of c6x -- send a blank email to c6x-subscribe@yahoogroups.com )