diff options
Diffstat (limited to 'nuttx/arch/arm/src/sama5/chip/sam_udphs.h')
| -rw-r--r-- | nuttx/arch/arm/src/sama5/chip/sam_udphs.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/sama5/chip/sam_udphs.h b/nuttx/arch/arm/src/sama5/chip/sam_udphs.h index 85e72b300..9e90cc963 100644 --- a/nuttx/arch/arm/src/sama5/chip/sam_udphs.h +++ b/nuttx/arch/arm/src/sama5/chip/sam_udphs.h @@ -4,6 +4,9 @@ * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> * + * References: + * SAMA5D3 Series Data Sheet + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -48,6 +51,10 @@ /******************************************************************************************** * Pre-processor Definitions ********************************************************************************************/ +/* General Definitions **********************************************************************/ + +#define SAM_UDPHS_NENDPOINTS 15 +#define SAM_UDPHS_NDMACHANNELS 7 /* Register offsets *************************************************************************/ @@ -431,6 +438,21 @@ * Public Types ********************************************************************************************/ +/* This structure defines the UDPHS DMA Transfer Descriptor. Instances of DMA transfer + * descriptors must by aligned to 16-byte address boundaries. + * + * Each value contains the next value of each of three UDPHS DMA registers. The first + * register value (UDPHS_DMANXTDSCx) is a link that can be used to chain sequences of + * DMA transfers. + */ + +struct udphs_dtd_s +{ + uint32_t nxtd; /* Next Descriptor Address Register: UDPHS_DMANXTDSCx */ + uint32_t addr; /* DMA Channelx Address Register: UDPHS_DMAADDRESSx */ + uint32_t ctrl; /* DMA Channelx Control Register: UDPHS_DMACONTROLx */ +}; + /******************************************************************************************** * Public Data ********************************************************************************************/ |