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SPI implement transaction locking

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Use transactions to skip mutex locks for reads and writes
This commit is contained in:
me-no-dev
2017-02-14 04:15:34 +02:00
parent 9bd5de11a7
commit d0232d126a
4 changed files with 449 additions and 109 deletions
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37
cores/esp32/esp32-hal-spi.h
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@ -85,12 +85,15 @@ void spiSSClear(spi_t * spi);
void spiWaitReady(spi_t * spi);
uint32_t spiGetClockDiv(spi_t * spi);
void spiSetClockDiv(spi_t * spi, uint32_t clockDiv);
uint8_t spiGetDataMode(spi_t * spi);
void spiSetDataMode(spi_t * spi, uint8_t dataMode);
uint8_t spiGetBitOrder(spi_t * spi);
/*
* Non transaction based lock methods (each locks and unlocks when called)
* */
void spiSetClockDiv(spi_t * spi, uint32_t clockDiv);
void spiSetDataMode(spi_t * spi, uint8_t dataMode);
void spiSetBitOrder(spi_t * spi, uint8_t bitOrder);
void spiWrite(spi_t * spi, uint32_t *data, uint8_t len);
@ -102,10 +105,32 @@ void spiTransfer(spi_t * spi, uint32_t *out, uint8_t len);
uint8_t spiTransferByte(spi_t * spi, uint8_t data);
uint16_t spiTransferWord(spi_t * spi, uint16_t data);
uint32_t spiTransferLong(spi_t * spi, uint32_t data);
void spiTransferBits(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits);
void spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t size);
void spiTransferBits(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits);
/*
* New (EXPERIMENTAL) Transaction lock based API (lock once until endTransaction)
* */
void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bitOrder);
void spiSimpleTransaction(spi_t * spi);
void spiEndTransaction(spi_t * spi);
void spiWriteNL(spi_t * spi, const void * data, uint32_t len);
void spiWriteByteNL(spi_t * spi, uint8_t data);
void spiWriteShortNL(spi_t * spi, uint16_t data);
void spiWriteLongNL(spi_t * spi, uint32_t data);
void spiWritePixelsNL(spi_t * spi, const void * data, uint32_t len);
#define spiTransferNL(spi, data, len) spiTransferBytesNL(spi, data, data, len)
uint8_t spiTransferByteNL(spi_t * spi, uint8_t data);
uint16_t spiTransferShortNL(spi_t * spi, uint16_t data);
uint32_t spiTransferLongNL(spi_t * spi, uint32_t data);
void spiTransferBytesNL(spi_t * spi, const void * data_in, uint8_t * data_out, uint32_t len);
void spiTransferBitsNL(spi_t * spi, uint32_t data_in, uint32_t * data_out, uint8_t bits);
/*
* Helper functions to translate frequency to clock divider and back
* */
uint32_t spiFrequencyToClockDiv(uint32_t freq);
uint32_t spiClockDivToFrequency(uint32_t freq);