Mirrors/rpitx
2
0
Fork 0
mirror of https://github.com/F5OEO/rpitx.git synced 2026-03-25 01:36:53 +01:00
Code Issues Packages Projects Releases Wiki Activity

Fix DMA memory bug

Browse Source
This commit is contained in:
F5OEO
2018-02-27 16:36:04 +00:00
parent 61afc7962e
commit 0841c37522
5 changed files with 65 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/fmdmasync.cpp
View File

@@ -20,29 +20,31 @@ void fmdmasync::SetDmaAlgo()
// Write a frequency sample
cbp->info = BCM2708_DMA_NO_WIDE_BURSTS /* BCM2708_DMA_WAIT_RESP |BCM2708_DMA_D_DREQ | BCM2708_DMA_PER_MAP(5)*/;
cbp->info = BCM2708_DMA_NO_WIDE_BURSTS | BCM2708_DMA_WAIT_RESP ;
cbp->src = mem_virt_to_phys(&usermem[samplecnt]);
cbp->dst = 0x7E000000 | GPCLK_DIV | CLK_BASE ;
cbp->dst = 0x7E000000 | (GPCLK_DIV<<2) | CLK_BASE ;
cbp->length = 4;
cbp->stride = 0;
cbp->next = mem_virt_to_phys(cbp + 1);
//printf("cbp : sample %x src %x dest %x next %x\n",ctl->sample + i,cbp->src,cbp->dst,cbp->next);
fprintf(stderr,"cbp : sample %x src %x dest %x next %x\n",samplecnt,cbp->src,cbp->dst,cbp->next);
cbp++;
// Delay
cbp->info = BCM2708_DMA_SRC_IGNOR |/* BCM2708_DMA_NO_WIDE_BURSTS | BCM2708_DMA_WAIT_RESP |*/ BCM2708_DMA_D_DREQ | BCM2708_DMA_PER_MAP(2);
cbp->src = mem_virt_to_phys(usermem); // Data is not important as we use it only to feed the PWM
cbp->dst = 0x7E000000 | PWM_FIFO | PWM_BASE ;
cbp->info = /*BCM2708_DMA_SRC_IGNOR | */BCM2708_DMA_NO_WIDE_BURSTS | BCM2708_DMA_WAIT_RESP | BCM2708_DMA_D_DREQ | BCM2708_DMA_PER_MAP(DREQ_PWM);
cbp->src = mem_virt_to_phys(cbarray); // Data is not important as we use it only to feed the PWM
cbp->dst = 0x7E000000 | (PWM_FIFO<<2) | PWM_BASE ;
cbp->length = 4;
cbp->stride = 0;
cbp->next = mem_virt_to_phys(cbp + 1);
fprintf(stderr,"cbp : sample %x src %x dest %x next %x\n",samplecnt,cbp->src,cbp->dst,cbp->next);
cbp++;
}
cbp--;
cbp->next = mem_virt_to_phys(cbarray); // We loop to the first CB
//fprintf(stderr,"Last cbp : src %x dest %x next %x\n",cbp->src,cbp->dst,cbp->next);
}
void fmdmasync::FillMemory(uint32_t FreqDivider,uint32_t FreqFractionnal)