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esp32/machine_spi: Calculate actual attained baudrate. 

Calculate the actual baudrate that the hardware is capable of achieving 
and remember it so that printing the SPI object will show this. Fixes 
#7530.
This commit is contained in:
Jonathan Hogg 2021-07-12 11:35:25 +01:00 committed by Damien George
parent 98c5703027
commit eb3029c669
1 changed files with 7 additions and 3 deletions
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10
ports/esp32/machine_hw_spi.c
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@ -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) {