3 files changed, 28 insertions, 0 deletions
diff --git a/os/hal/templates/halconf.h b/os/hal/templates/halconf.h
index 20cd4c54e..d5cd47cb5 100644
--- a/os/hal/templates/halconf.h
+++ b/os/hal/templates/halconf.h
@@ -173,6 +173,17 @@
 #define MMC_POLLING_DELAY           10
 #endif
 
+/**
+ * @brief   Uses the SPI polled API for small data transfers.
+ * @details Polled transfers usually improve performance because it
+ *          saves two context switches and interrupt servicing. Note
+ *          that this option has no effect on large transfers which
+ *          are always performed using DMAs/IRQs.
+ */
+#if !defined(MMC_USE_SPI_POLLING) || defined(__DOXYGEN__)
+#define MMC_USE_SPI_POLLING         TRUE
+#endif
+
 /*===========================================================================*/
 /* PAL driver related settings.                                              */
 /*===========================================================================*/
diff --git a/os/hal/templates/spi_lld.c b/os/hal/templates/spi_lld.c
index 1fca51d41..f3053f725 100644
--- a/os/hal/templates/spi_lld.c
+++ b/os/hal/templates/spi_lld.c
@@ -177,6 +177,22 @@ void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf) {
 
 }
 
+/**
+ * @brief   Exchanges one frame using a polled wait.
+ * @details This synchronous function exchanges one frame using a polled
+ *          synchronization method. This function is useful when exchanging
+ *          small amount of data on high speed channels, usually in this
+ *          situation is much more efficient just wait for completion using
+ *          polling than suspending the thread waiting for an interrupt.
+ *
+ * @param[in] spip      pointer to the @p SPIDriver object
+ * @param[in] frame     the data frame to send over the SPI bus
+ * @return              The received data frame from the SPI bus.
+ */
+uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame) {
+
+}
+
 #endif /* CH_HAL_USE_SPI */
 
 /** @} */
diff --git a/os/hal/templates/spi_lld.h b/os/hal/templates/spi_lld.h
index 7fff799d1..acc6a699f 100644
--- a/os/hal/templates/spi_lld.h
+++ b/os/hal/templates/spi_lld.h
@@ -132,6 +132,7 @@ extern "C" {
                         const void *txbuf, void *rxbuf);
   void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf);
   void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf);
+  uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame);
 #ifdef __cplusplus
 }
 #endif