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SPI: forced transfers via spi_transfer to have the same TX and RX size

This commit is contained in:
Silvano Seva 2024-09-22 14:53:19 +02:00
parent ac7e176d3b
commit b70963d1d5
1 changed files with 10 additions and 10 deletions
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20
openrtx/include/peripherals/spi.h
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@ -21,6 +21,7 @@
#ifndef SPI_H #ifndef SPI_H
#define SPI_H #define SPI_H
#include <errno.h>
#include <stdint.h> #include <stdint.h>
#include <pthread.h> #include <pthread.h>
@ -46,13 +47,12 @@ struct spiDevice;
* *
* @param dev: SPI device handle. * @param dev: SPI device handle.
* @param txBuf: pointer to TX buffer, can be NULL. * @param txBuf: pointer to TX buffer, can be NULL.
* @param txSize: number of bytes to send.
* @param rxBuf: pointer to RX buffer, can be NULL. * @param rxBuf: pointer to RX buffer, can be NULL.
* @param rxSize: number of bytes to receive. * @param size: number of bytes to transfer.
* @return zero on success, a negative error code otherwise. * @return zero on success, a negative error code otherwise.
*/ */
typedef int (*spi_transfer_impl)(const struct spiDevice *dev, const void *txBuf, typedef int (*spi_transfer_impl)(const struct spiDevice *dev, const void *txBuf,
const size_t txSize, void *rxBuf, const size_t rxSize); void *rxBuf, const size_t size);
/** /**
* SPI peripheral descriptor. * SPI peripheral descriptor.
@ -129,18 +129,18 @@ static inline int spi_release(const struct spiDevice *dev)
} }
/** /**
* Transfer data on the SPI bus. * Transfer data on the SPI bus. Only symmetric transfers (same TX and RX size)
* are allowed!
* *
* @param txBuf: pointer to TX buffer, can be NULL. * @param txBuf: pointer to TX buffer, can be NULL.
* @param txSize: number of bytes to send.
* @param rxBuf: pointer to RX buffer, can be NULL. * @param rxBuf: pointer to RX buffer, can be NULL.
* @param rxSize: number of bytes to receive. * @param size: number of bytes to transfer.
* @return zero on success, a negative error code otherwise. * @return zero on success, a negative error code otherwise.
*/ */
static inline int spi_transfer(const struct spiDevice *dev, const void *txBuf, static inline int spi_transfer(const struct spiDevice *dev, const void *txBuf,
const size_t txSize, void *rxBuf, const size_t rxSize) void *rxBuf, const size_t size)
{ {
return dev->transfer(dev, txBuf, txSize, rxBuf, rxSize); return dev->transfer(dev, txBuf, rxBuf, size);
} }
/** /**
@ -153,7 +153,7 @@ static inline int spi_transfer(const struct spiDevice *dev, const void *txBuf,
static inline int spi_send(const struct spiDevice *dev, const void *txBuf, static inline int spi_send(const struct spiDevice *dev, const void *txBuf,
const size_t txSize) const size_t txSize)
{ {
return dev->transfer(dev, txBuf, txSize, NULL, 0); return dev->transfer(dev, txBuf, NULL, txSize);
} }
/** /**
@ -166,7 +166,7 @@ static inline int spi_send(const struct spiDevice *dev, const void *txBuf,
static inline int spi_receive(const struct spiDevice *dev, void *rxBuf, static inline int spi_receive(const struct spiDevice *dev, void *rxBuf,
const size_t rxSize) const size_t rxSize)
{ {
return dev->transfer(dev, NULL, 0, rxBuf, rxSize); return dev->transfer(dev, NULL, rxBuf, rxSize);
} }
#ifdef __cplusplus #ifdef __cplusplus