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fix SPI run on system clock

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This commit is contained in:
Markus Sattler 2015-05-08 15:27:32 +02:00
parent 51b1daf643
commit 7c33efc3d8
1 changed files with 5 additions and 1 deletions
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6
libraries/SPI/SPI.cpp
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@ -43,7 +43,6 @@ void SPIClass::begin() {
pinMode(MISO, SPECIAL); ///< GPIO12 pinMode(MISO, SPECIAL); ///< GPIO12
pinMode(MOSI, SPECIAL); ///< GPIO13 pinMode(MOSI, SPECIAL); ///< GPIO13
GPMUX = 0x105; // note crash if SPI flash Frequency < 40MHz
SPI1C = 0; SPI1C = 0;
setFrequency(1000000); ///< 1MHz setFrequency(1000000); ///< 1MHz
SPI1U = SPIUMOSI | SPIUDUPLEX | SPIUSSE; SPI1U = SPIUMOSI | SPIUDUPLEX | SPIUSSE;
@ -187,6 +186,11 @@ void SPIClass::setFrequency(uint32_t freq) {
} }
void SPIClass::setClockDivider(uint32_t clockDiv) { void SPIClass::setClockDivider(uint32_t clockDiv) {
if(clockDiv == 0x80000000) {
GPMUX |= (1 << 9); // Set bit 9 if sysclock required
} else {
GPMUX &= ~(1 << 9);
}
SPI1CLK = clockDiv; SPI1CLK = clockDiv;
} }