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How do I write a memory barrier for a TMS320F2812 DSP?

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问题 I've looked through the TI C/C++ compiler v6.1 user's guide (spru514e) but didn't find anything. The asm statement doesn't seem to provide anything in this regard, the manual even warns against changing values of variables (p132). The GNU extension for declaring effects on variables is not implemented (p115). I also didn't find any intrinsic for memory barriers (like __memory_changed() in Keil's armcc). Searching the web or the TI forums also turned up nothing. Any other hints how to proceed?

TMS320F2812 FatFs f_write returns FR_DISK_ERR

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问题 I have problem with an SD card. I'm using the FatFs library ver R0.10b to access the SD card. My code: // .... // FATFS fatfs; FIL plik; FRESULT fresult,res1,res2,res3,res4,res5; UINT zapisanych_bajtow = 0 , br; UINT zapianie_bajtow = 0; char * buffor = "123456789abcdef\r\n"; unsigned short int i; void main(void) { // ... // res1 = f_mount(0,&fatfs); // returns FA_OK res2 = f_open( &plik, "f721.txt", FA_OPEN_ALWAYS | FA_WRITE ); // returns FA_OK if( res2 == FR_OK ) { res3 = f_write( &plik, (

How do I write a memory barrier for a TMS320F2812 DSP?

阅读更多关于 How do I write a memory barrier for a TMS320F2812 DSP?

I've looked through the TI C/C++ compiler v6.1 user's guide ( spru514e ) but didn't find anything. The asm statement doesn't seem to provide anything in this regard, the manual even warns against changing values of variables (p132). The GNU extension for declaring effects on variables is not implemented (p115). I also didn't find any intrinsic for memory barriers (like __memory_changed() in Keil's armcc). Searching the web or the TI forums also turned up nothing. Any other hints how to proceed? Memory barriers are about the ordering of memory accesses, but you also have to ensure that values