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Skip SPI re-init if clock frequency doesn't change (#1934)

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Nerradia 2024-01-28 19:27:12 +01:00 committed by GitHub
parent 2a74250a51
commit 02c272b091
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1 changed files with 10 additions and 7 deletions
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9
libraries/SPI/src/SPI.cpp
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@ -184,15 +184,18 @@ void SPIClassRP2040::beginTransaction(SPISettings settings) {
if (_initted && settings == _spis) { if (_initted && settings == _spis) {
DEBUGSPI("SPI: Reusing existing initted SPI\n"); DEBUGSPI("SPI: Reusing existing initted SPI\n");
} else { } else {
_spis = settings; /* Only de-init if the clock changes frequency */
if (settings.getClockFreq() != _spis.getClockFreq()) {
if (_initted) { if (_initted) {
DEBUGSPI("SPI: deinitting currently active SPI\n"); DEBUGSPI("SPI: deinitting currently active SPI\n");
spi_deinit(_spi); spi_deinit(_spi);
} }
DEBUGSPI("SPI: initting SPI\n"); DEBUGSPI("SPI: initting SPI\n");
spi_init(_spi, _spis.getClockFreq()); spi_init(_spi, settings.getClockFreq());
spi_set_format(_spi, 8, cpol(), cpha(), SPI_MSB_FIRST);
DEBUGSPI("SPI: actual baudrate=%u\n", spi_get_baudrate(_spi)); DEBUGSPI("SPI: actual baudrate=%u\n", spi_get_baudrate(_spi));
}
_spis = settings;
spi_set_format(_spi, 8, cpol(), cpha(), SPI_MSB_FIRST);
_initted = true; _initted = true;
} }
// Disable any IRQs that are being used for SPI // Disable any IRQs that are being used for SPI