diff options
| -rw-r--r-- | ports/esp32/machine_hw_spi.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/ports/esp32/machine_hw_spi.c b/ports/esp32/machine_hw_spi.c index 98c0abaef..2792216cc 100644 --- a/ports/esp32/machine_hw_spi.c +++ b/ports/esp32/machine_hw_spi.c @@ -144,9 +144,13 @@ STATIC void machine_hw_spi_init_internal( changed = true; } - if (baudrate != -1 && baudrate != self->baudrate) { - self->baudrate = baudrate; - changed = true; + if (baudrate != -1) { + // calculate the actual clock frequency that the SPI peripheral can produce + baudrate = spi_get_actual_clock(APB_CLK_FREQ, baudrate, 0); + if (baudrate != self->baudrate) { + self->baudrate = baudrate; + changed = true; + } } if (polarity != -1 && polarity != self->polarity) { |