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Potential fix for 0-length usb packets seen on OSX

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This commit is contained in:
Martin Holst Swende 2015-07-17 00:01:58 +02:00
commit 83f3f8ac40
3 changed files with 18 additions and 5 deletions
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6
armsrc/lfops.c
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@ -399,14 +399,10 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
#define OPEN_COIL() HIGH(GPIO_SSC_DOUT)
i = 0;
byte_t rx[sizeof(UsbCommand)]; // Storage for usb_read call in loop
for(;;) {
//wait until SSC_CLK goes HIGH
while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
// Craig Young - Adding a usb_read() here to avoid abort on empty UsbCommand
// My OS X client does this preventing simulation.
// Performance hit should be non-existent since the read is only performed if usb_poll is true
if(BUTTON_PRESS() || (usb_poll() && usb_read(rx,sizeof(UsbCommand)))) {
if(BUTTON_PRESS() || (usb_poll_validate_length() )) {
DbpString("Stopped");
return;
}