From 465f2710c610ad0b889d4ffaaed18805c552b2cb Mon Sep 17 00:00:00 2001
From: Koen Zandberg <koen@bergzand.net>
Date: Mon, 20 Mar 2017 09:33:34 +0100
Subject: [PATCH] stm32_common/spi: fix receive after transmit-only error

---
 cpu/stm32_common/periph/spi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cpu/stm32_common/periph/spi.c b/cpu/stm32_common/periph/spi.c
index 60f0a85924..ccad7bcef8 100644
--- a/cpu/stm32_common/periph/spi.c
+++ b/cpu/stm32_common/periph/spi.c
@@ -172,6 +172,7 @@ void spi_transfer_bytes(spi_t bus, spi_cs_t cs, bool cont,
             *DR = outbuf[i];
         }
         /* wait until everything is finished and empty the receive buffer */
+        while (!(dev(bus)->SR & SPI_SR_TXE)) {}
         while (dev(bus)->SR & SPI_SR_BSY) {}
         while (dev(bus)->SR & SPI_SR_RXNE) {
             dev(bus)->DR;       /* we might just read 2 bytes at once here */