diff options
| -rw-r--r-- | ports/stm32/spi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/ports/stm32/spi.c b/ports/stm32/spi.c index 19f2b65ed..248075579 100644 --- a/ports/stm32/spi.c +++ b/ports/stm32/spi.c @@ -481,7 +481,10 @@ int spi_init(const spi_t *self, bool enable_nss_pin) { if (pins[i] == NULL) { continue; } - mp_hal_pin_config_alt(pins[i], mode, pull, AF_FN_SPI, (self - &spi_obj[0]) + 1); + if (!mp_hal_pin_config_alt(pins[i], mode, pull, AF_FN_SPI, (self - &spi_obj[0]) + 1)) { + // Pin does not have SPI alternate function. + return -MP_EINVAL; + } } // init the SPI device |