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some speed optimizations

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This commit is contained in:
Markus Sattler 2015-05-08 15:33:48 +02:00
parent 7c33efc3d8
commit dcc899a1b5
1 changed files with 5 additions and 1 deletions
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6
libraries/SPI/SPI.cpp
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@ -123,7 +123,11 @@ void SPIClass::setFrequency(uint32_t freq) {
const spiClk_t minFreqReg = { 0x7FFFF000 };
uint32_t minFreq = ClkRegToFreq((spiClk_t*) &minFreqReg);
if(freq < minFreq) {
freq = minFreq;
// use minimum possible clock
setClockDivider(minFreqReg.regValue);
lastSetRegister = SPI1CLK;
lastSetFrequency = freq;
return;
}
uint8_t calN = 1;