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关于ipnc_rdk 3.5中DMA的问题?



我用8148 ipnc_rdk3.5做开发,最近我想在camera link中复制一份1080p的原始图像数据,利用memcpy太占用时间,因此我想利用DM81XX_EDMA3_setParams和DM81XX_EDMA3_triggerTransfer函数来实现数据拷贝,我在ipnc rdk3.5中有看到在va link和fd link中看到这两个函数的用法,
但是我不知道在camera link中DM81XX_EDMA3_setParams函数的第一个参数应该给哪个值,在va link中给的是宏VA_LINK_EDMA3_CH_ID,在fd link中给的是FD_LINK_EDMA3_CH_ID,我想请问一下DM81XX_EDMA3_setParams函数第一个参数的的含义是什么,另外在camera link中应该给哪个值???