Content originally posted in LPCWare by silber on Thu Nov 18 11:25:12 MST 2010
Hi,
I using a LPC1754 and i want to use the 2 SSP Blocks with DMA.
SPI Interface config :
SSP_CPHA_FIRST
SSP_CPOL_HI
ClockRate 24MHz
SSP_DATABIT_8
SSP_MASTER_MODE
Loop Back mode
Core Clock 96 MHz
Im using the CMSISv1p30_LPC17xx
0x400FC1C4 allready corrected
When i start the ssp1 dma when ssp0 dma is ready it works fine.
But when i start the ssp dma "simultaneously" i very often get no irq and data is also not refreshed.
DMA Setup:
Channel 0 : SSP0 Rx
Channel 1 : SSP1 Rx
Channel 2 : SSP0 Tx
Channel 3 : SSP1 Tx
also tried:
DMA Setup:
Channel 0 : SSP0 Tx
Channel 1 : SSP0 Rx
Channel 2 : SSP1 Tx
Channel 3 : SSP1 Rx
Anyone can help ?
:confused::confused::confused::confused:
