Bug fix in SPI APIs o avoid sending dummy character for first transfer by slave

2015-07-09 14:30:24 +05:30 · 2015-07-09 14:30:24 +05:30 · c0da42a0a3
parent 37c52f0d9c
commit c0da42a0a3
1 changed files with 2 additions and 0 deletions
--- a/libraries/mbed/targets/hal/TARGET_Atmel/TARGET_SAM21/spi_api.c
+++ b/libraries/mbed/targets/hal/TARGET_Atmel/TARGET_SAM21/spi_api.c
@ -384,6 +384,8 @@ void spi_format(spi_t *obj, int bits, int mode, int slave)
        _SPI(obj).CTRLA.bit.MODE = 0x2;
        pSPI_S(obj)->mode = SPI_MODE_SLAVE;
        pull_mode = PullNone;
+        /* Enable PLOADEN to avoid sending dummy character by slave */
+        _SPI(obj).CTRLB.bit.PLOADEN = 1;
    } else {
        /* Set the SERCOM in SPI mode */
        _SPI(obj).CTRLA.bit.MODE = 0x3;