Merge pull request #6764 from bergzand/stm32common-spi

stm32_common/spi: fix receive after transmit-only error
6 years ago · 4e33f0f735
parent 1a9b12f125 465f2710c6
commit 4e33f0f735
1 changed files with 1 additions and 0 deletions
--- 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 */