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QSPI interface: Add support for dual and quad read transfers; Add support for dummy read cycles.

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This commit is contained in:
Gregory Nutt 2015-08-28 12:00:06 -06:00
parent d2653ef7a8
commit e392471dc2
2 changed files with 10 additions and 4 deletions
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2
arch

@ -1 +1 @@
Subproject commit 1a54ffc673e7fafc388b43677b2a947171437645
Subproject commit e6fdf9eb6a1e288e90a12eb3ee70a393ea30bec3

12
include/nuttx/spi/qspi.h
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@ -174,12 +174,17 @@
/* QSPI Memory Transfer Flags */
#define QSPIMEM_WRITE (1 << 2) /* Bit 2: Memory write data transfer */
#define QSPIMEM_SCRAMBLE (1 << 3) /* Bit 3: Memory write data transfer */
#define QSPIMEM_RANDOM (1 << 3) /* Bit 4: Use random key in scrambler */
#define QSPIMEM_READ (0) /* Bit 2: 0=Memory read data transfer */
#define QSPIMEM_WRITE (1 << 2) /* Bit 2: 1=Memory write data transfer */
#define QSPIMEM_DUALIO (1 << 3) /* Bit 3: Use Dual I/O (READ only) */
#define QSPIMEM_QUADIO (1 << 4) /* Bit 4: Use Quad I/O (READ only) */
#define QSPIMEM_SCRAMBLE (1 << 5) /* Bit 5: Scramble data */
#define QSPIMEM_RANDOM (1 << 6) /* Bit 6: Use random key in scrambler */
#define QSPIMEM_ISREAD(f) (((f) & QSPIMEM_WRITE) == 0)
#define QSPIMEM_ISWRITE(f) (((f) & QSPIMEM_WRITE) != 0)
#define QSPIMEM_ISDUALIO(f) (((f) & QSPIMEM_DUALIO) != 0)
#define QSPIMEM_ISQUADIO(f) (((f) & QSPIMEM_QUADIO) != 0)
#define QSPIMEM_ISSCRAMBLE(f) (((f) & QSPIMEM_SCRAMBLE) != 0)
#define QSPIMEM_ISRANDOM(f) \
@ -218,6 +223,7 @@ struct qspi_meminfo_s
{
uint8_t flags; /* See QSPMEM_* definitions */
uint8_t addrlen; /* Address length in bytes */
uint8_t dummies; /* Number of dummy read cycles (READ only) */
uint16_t buflen; /* Data buffer length in bytes */
uint16_t cmd; /* Memory access command */
uint32_t addr; /* Memory Address */