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SPI: Provide byte[] JNI interfaces.

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This avoids a direct byte buffer allocation on every read/write/transaction
for the byte[] variants.

Also change spiGetAccumulatorOutput() to directly set the AccumulatorResult
object, avoiding a ByteBuffer allocation.

Changes HAL SPI interfaces to use const for dataToSend.

Fixes #733.
This commit is contained in:
Peter Johnson
2017-11-14 00:00:45 -08:00
parent df7c1389de
commit 6307d41002
11 changed files with 168 additions and 73 deletions
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5
hal/src/main/native/include/HAL/SPI.h
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@@ -24,9 +24,10 @@ extern "C" {
#endif
void HAL_InitializeSPI(HAL_SPIPort port, int32_t* status);
int32_t HAL_TransactionSPI(HAL_SPIPort port, uint8_t* dataToSend,
int32_t HAL_TransactionSPI(HAL_SPIPort port, const uint8_t* dataToSend,
uint8_t* dataReceived, int32_t size);
int32_t HAL_WriteSPI(HAL_SPIPort port, uint8_t* dataToSend, int32_t sendSize);
int32_t HAL_WriteSPI(HAL_SPIPort port, const uint8_t* dataToSend,
int32_t sendSize);
int32_t HAL_ReadSPI(HAL_SPIPort port, uint8_t* buffer, int32_t count);
void HAL_CloseSPI(HAL_SPIPort port);
void HAL_SetSPISpeed(HAL_SPIPort port, int32_t speed);