BF609 PIXC DMA LIST 读取错误。
我的链表配置方式如下：
/* DMA descriptor work unit for PDMA */
typedef struct
{
volatile void *pNextDesc; /* Pointer to next Descriptor */
volatile void *pStartAddr; /* Start address of current buffer */
volatile uint32_t Config; /* Configuration register */
volatile uint32_t XCount; /* XCOUNT - Inner loop count start value in number of MSIZE data transfers*/
volatile int32_t XModify; /* XMODIFY - Inner loop address increment, in bytes */
volatile uint32_t YCount; /* YCOUNT - Outer loop count start value (2D only), in number of rows*/
volatile int32_t YModify; /* YMODIFY - Outer loop address increment (2D only), in bytes*/
} PDMA_DESC_WORK_UNIT;
#pragma section("L1_data")
#pragma align 32
PDMA_DESC_WORK_UNIT OSD_DMA35_DescriptorCopy[6];
void dma35List(void)
{
OSD_DMA35_DescriptorCopy[0].pNextDesc = &OSD_DMA35_DescriptorCopy[1];// 下一个描述符地址
//OSD_DMA15_DescriptorCopy[0].Config = DMAEN | WDSIZE_32 | DMA2D | NDSIZE_9 | FLOW_LARGE;// DMA config
OSD_DMA35_DescriptorCopy[0].Config = ENUM_DMA_CFG_READ |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_FETCH07 |
ENUM_DMA_CFG_DSCLIST;
OSD_DMA35_DescriptorCopy[0].XCount = 640*2/4; // X Count
OSD_DMA35_DescriptorCopy[0].XModify = 4; // X Mod
OSD_DMA35_DescriptorCopy[0].YCount = (512-32)/2; // Y Count
OSD_DMA35_DescriptorCopy[0].YModify = (720-640)*2+4;
OSD_DMA35_DescriptorCopy[1].pNextDesc = &OSD_DMA35_DescriptorCopy[2];// 下一个描述符地址
//OSD_DMA15_DescriptorCopy[1].Config = DMAEN | WDSIZE_32 | DMA2D | NDSIZE_9 | FLOW_LARGE;// DMA config
OSD_DMA35_DescriptorCopy[1].Config = ENUM_DMA_CFG_READ |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_FETCH07 |
ENUM_DMA_CFG_DSCLIST;
OSD_DMA35_DescriptorCopy[1].XCount = ((640-32)/2)*2/4; // X Count
OSD_DMA35_DescriptorCopy[1].XModify = 4; // X Mod
OSD_DMA35_DescriptorCopy[1].YCount = 32; // Y Count
OSD_DMA35_DescriptorCopy[1].YModify = (720-((640-32)/2))*2+4;
OSD_DMA35_DescriptorCopy[2].pNextDesc = &OSD_DMA35_DescriptorCopy[3];// 下一个描述符地址
//OSD_DMA15_DescriptorCopy[2].Config = DMAEN | WDSIZE_32 | DMA2D | NDSIZE_9 | FLOW_LARGE;// DMA config
OSD_DMA35_DescriptorCopy[2].Config = ENUM_DMA_CFG_READ |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_FETCH07 |
ENUM_DMA_CFG_DSCLIST;
OSD_DMA35_DescriptorCopy[2].XCount = ((640-32)/2)*2/4; // X Count
OSD_DMA35_DescriptorCopy[2].XModify = 4; // X Mod
OSD_DMA35_DescriptorCopy[2].YCount = 32; // Y Count
OSD_DMA35_DescriptorCopy[2].YModify = (720-((640-32)/2))*2+4;
OSD_DMA35_DescriptorCopy[3].pNextDesc = &OSD_DMA35_DescriptorCopy[4];// 下一个描述符地址
// OSD_DMA15_DescriptorCopy[3].Config = DMAEN | WDSIZE_32 | DMA2D | NDSIZE_9 | FLOW_LARGE;// DMA config
OSD_DMA35_DescriptorCopy[3].Config = ENUM_DMA_CFG_READ |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_FETCH07 |
ENUM_DMA_CFG_DSCLIST;
OSD_DMA35_DescriptorCopy[3].XCount = 640*2/4; // X Count
OSD_DMA35_DescriptorCopy[3].XModify = 4; // X Mod
OSD_DMA35_DescriptorCopy[3].YCount = (512-32)/2-128; // Y Count
OSD_DMA35_DescriptorCopy[3].YModify = (720-640)*2+4;
OSD_DMA35_DescriptorCopy[4].pNextDesc = &OSD_DMA35_DescriptorCopy[5];// 下一个描述符地址
// OSD_DMA15_DescriptorCopy[4].Config = DMAEN | WDSIZE_32 | DMA2D | NDSIZE_9 | FLOW_LARGE;// DMA config
OSD_DMA35_DescriptorCopy[4].Config = ENUM_DMA_CFG_READ |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_FETCH07 |
ENUM_DMA_CFG_DSCLIST;
OSD_DMA35_DescriptorCopy[4].XCount = (640-160)*2/4; // X Count
OSD_DMA35_DescriptorCopy[4].XModify = 4; // X Mod
OSD_DMA35_DescriptorCopy[4].YCount = 128; // Y Count
OSD_DMA35_DescriptorCopy[4].YModify = (720-(640-160))*2+4;
//与开窗重合
OSD_DMA35_DescriptorCopy[5].pNextDesc = &OSD_DMA35_DescriptorCopy[5];// 下一个描述符地址
// OSD_DMA15_DescriptorCopy[5].Config = DMAEN | WDSIZE_32 | DMA2D | FLOW_STOP;// DMA config 结束
OSD_DMA35_DescriptorCopy[5].Config = ENUM_DMA_CFG_READ |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_STOP;
OSD_DMA35_DescriptorCopy[5].XCount = 160*2/4; // X Count
OSD_DMA35_DescriptorCopy[5].XModify = 4; // X Mod
OSD_DMA35_DescriptorCopy[5].YCount = 128; // Y Count
OSD_DMA35_DescriptorCopy[5].YModify = (720-160)*2+4;
}
void pixc_cfg(void)
{
*pREG_PIXC0_TRANSP_A = TranspRatio;//透明度 0~F--50%
*pREG_PIXC0_PPL = 1276;//行内计数
*pREG_PIXC0_LPF = 256;//逐行叠加
*pREG_PIXC0_HSTART_A = 0;//行开始
*pREG_PIXC0_HEND_A = 1276+1;//行结束
*pREG_PIXC0_VSTART_A = 0;//垂直开始
*pREG_PIXC0_VEND_A = 256;//垂直结束
//*pPIXC_CTL = TC_EN;//不叠加OSD 只复制
*pREG_PIXC0_CTL = BITM_PIXC_CTL_ENTC;//不叠加OSD 只复制
*pREG_DMA35_DSCPTR_NXT=(&OSD_DMA35_DescriptorCopy[0]);
*pREG_DMA37_DSCPTR_NXT=(&OSD_DMA37_DescriptorCopy[0]);
if((*pREG_DMA37_STAT &BITM_DMA_STAT_RUN)==0)//判断输出DMA状态
{
//开启使能 必须先开启DMA
// *pDMA15_CONFIG = DMAEN | NDSIZE_9 | FLOW_LARGE;// DMA config
// *pDMA17_CONFIG = DMAEN | NDSIZE_9 | FLOW_LARGE;// DMA config
*pREG_DMA35_CFG = ENUM_DMA_CFG_READ |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_FETCH07 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_DSCLIST;
*pREG_DMA37_CFG = ENUM_DMA_CFG_WRITE |
ENUM_DMA_CFG_EN |
ENUM_DMA_CFG_FETCH07 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_DSCLIST;
ssync();
//使能PIXC
//*pPIXC_CTL |= PIXC_EN;
*pREG_PIXC0_CTL |= BITM_PIXC_CTL_EN;
ssync();
}
}
当使能PIXC以后。
DMA35_37_STAT都有错误：0X00006002
寄存器截图为：
我无法找到DMA错误的原因。