Add pullup to USB interrupt line
- A pullup on the INT pin is required when the pin is level-active
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@ -109,8 +109,8 @@ bool MAX3421e::reset() {
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bool MAX3421e::start() {
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// Initialize pins and SPI bus
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SET_OUTPUT(SDSS);
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SET_INPUT(USB_INTR_PIN);
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SET_OUTPUT(USB_CS_PIN);
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SET_INPUT_PULLUP(USB_INTR_PIN);
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ncs();
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spiBegin();
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