IOTON Technology / mbed-ton

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Diff: hal/spi_api.h

Revision:
167:e84263d55307
Parent:
149:156823d33999
--- a/hal/spi_api.h	Thu Jun 08 15:02:37 2017 +0100
+++ b/hal/spi_api.h	Wed Jun 21 17:46:44 2017 +0100
@@ -116,6 +116,23 @@
  */
 int  spi_master_write(spi_t *obj, int value);
 
+/** Write a block out in master mode and receive a value
+ *
+ *  The total number of bytes sent and recieved will be the maximum of
+ *  tx_length and rx_length. The bytes written will be padded with the
+ *  value 0xff.
+ *
+ * @param[in] obj       The SPI peripheral to use for sending
+ * @param[in] tx_buffer Pointer to the byte-array of data to write to the device
+ * @param[in] tx_length Number of bytes to write, may be zero
+ * @param[in] rx_buffer Pointer to the byte-array of data to read from the device
+ * @param[in] rx_length Number of bytes to read, may be zero
+ * @returns
+ *      The number of bytes written and read from the device. This is
+ *      maximum of tx_length and rx_length.
+ */
+int spi_master_block_write(spi_t *obj, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length);
+
 /** Check if a value is available to read
  *
  * @param[in] obj The SPI peripheral to check