New! LPC3250 DMA Interrupt Help eswar g
Hi
I'm facing problum while configuration for GPDMA. I was unable to generate interrupt on DMA. here I'm listing 1.I configured DMA Channel 0 for UART2 for 4 bytes trigger. But unable to get.
2.What that channel linked list register will do?
I have studied the data sheet. But unable to get these things.
Please help me
Here i'm attaching the GPDMA configuration what i did.
GPDMA_SOFT_BREQ |=0x00000100; // HSUART 2 TX Selected GPDMA_CH0_SRC =HSU2_RX; // Selecting Source address GPDMA_CH0_DEST =(unsigned long)&Rx_Buffer_485[0]; GPDMA_CH0_LLI =0x00000000; GPDMA_CH0_CTRL = 0x88009001; // Terminal count interrupt and //transfer size 4byts(8bits wide) GPDMA_CH0_CFG |=0x00001008; // Peripheral to memory trnasaction GPDMA_CONFIG |=0x00000001; // Enable DMA Controller
Thanks Eswar
Hi all
I'm trying to transmit data through DMA. i was able to get interrupt and transfer the data. but the data was junk coming. Here is my configuration
DMACLK_CTRL |=0x00000001; // enable all DMA Clocks GPDMA_CH0_SRC =(unsigned long)Tx_Buffer_485[0]; GPDMA_CH0_DEST =0x40018000; // HSUART2_TX address GPDMA_CH0_LLI =0x00000000; GPDMA_CH0_CTRL =0x85492002; // 32 bit wide 8byte GPDMA_CONFIG |=0x00000001; // Enable DMA Controller GPDMA_CH0_CFG |=0x000009C1; // memory to Peripheraltrnasaction
i'm using HSUART2 to transfer data. Source is memory. and destination is HSUART2 Tx My source burst size is8 bytes destination burst size is 8 bytes Source and destination width is 32bit wide and transfer size is 2
for(i=0;i<8;i++) { Tx_Buffer_485[i]=0x38; }
like above i filled the buffer.
aim: Transfer the data of 8 bytes from pheripheral to memory.
anyone can please help me on this configuration
thanks eswar
Hi all by small correction for above post i'm posting again
aim :Transfer the data of 8 bytes from memory to pheripheral.