deac
/
osd-contiki
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

cc2538: spi: Add support for dynamic instances 

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>
master-31012017
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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)