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cc2538: spi: Add support for dynamic instances

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Previously, only constants could be used to pass SPI instances to the
SPI driver. This change makes it possible to use SPI instances from
variables.

Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>
This commit is contained in:
Benoît Thébaudeau 2016-11-17 17:50:01 +01:00 committed by Benoît Thébaudeau
parent 0e5b18635b
commit c76b8235f4
2 changed files with 7 additions and 5 deletions
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2
cpu/cc2538/dev/ssi.h
View file

@ -57,6 +57,8 @@
*/
#define SSI0_BASE 0x40008000 /**< Base address for SSI0 */
#define SSI1_BASE 0x40009000 /**< Base address for SSI1 */
/** Base address of the \c dev instance of the SSI */
#define SSI_BASE(dev) (SSI0_BASE + (dev) * (SSI1_BASE - SSI0_BASE))
/** @} */
/*---------------------------------------------------------------------------*/
/** \name SSI register offsets

10
cpu/cc2538/spi-arch.h
View file

@ -109,17 +109,17 @@
/*---------------------------------------------------------------------------*/
/* New API macros */
#define SPIX_WAITFORTxREADY(spi) do { \
while(!(REG(CC_CONCAT3(SSI, spi, _BASE) + SSI_SR) & SSI_SR_TNF)) ; \
while(!(REG(SSI_BASE(spi) + SSI_SR) & SSI_SR_TNF)) ; \
} while(0)
#define SPIX_BUF(spi) REG(CC_CONCAT3(SSI, spi, _BASE) + SSI_DR)
#define SPIX_BUF(spi) REG(SSI_BASE(spi) + SSI_DR)
#define SPIX_WAITFOREOTx(spi) do { \
while(REG(CC_CONCAT3(SSI, spi, _BASE) + SSI_SR) & SSI_SR_BSY) ; \
while(REG(SSI_BASE(spi) + SSI_SR) & SSI_SR_BSY) ; \
} while(0)
#define SPIX_WAITFOREORx(spi) do { \
while(!(REG(CC_CONCAT3(SSI, spi, _BASE) + SSI_SR) & SSI_SR_RNE)) ; \
while(!(REG(SSI_BASE(spi) + SSI_SR) & SSI_SR_RNE)) ; \
} while(0)
#define SPIX_FLUSH(spi) do { \
while(REG(CC_CONCAT3(SSI, spi, _BASE) + SSI_SR) & SSI_SR_RNE) { \
while(REG(SSI_BASE(spi) + SSI_SR) & SSI_SR_RNE) { \
SPIX_BUF(spi); \
} \
} while(0)