diff options
Diffstat (limited to 'cores/arduino/CDC.cpp')
| -rw-r--r-- | cores/arduino/CDC.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/cores/arduino/CDC.cpp b/cores/arduino/CDC.cpp index 90a1698..5e872c5 100644 --- a/cores/arduino/CDC.cpp +++ b/cores/arduino/CDC.cpp @@ -32,6 +32,7 @@ typedef struct } LineInfo; static volatile LineInfo _usbLineInfo = { 57600, 0x00, 0x00, 0x00, 0x00 }; +static volatile int32_t breakValue = -1; #define WEAK __attribute__ ((weak)) @@ -76,6 +77,11 @@ bool CDC_Setup(USBSetup& setup) if (REQUEST_HOSTTODEVICE_CLASS_INTERFACE == requestType) { + if (CDC_SEND_BREAK == r) + { + breakValue = ((uint16_t)setup.wValueH << 8) | setup.wValueL; + } + if (CDC_SET_LINE_CODING == r) { USB_RecvControl((void*)&_usbLineInfo,7); @@ -207,6 +213,7 @@ Serial_::operator bool() { } unsigned long Serial_::baud() { + // Disable interrupts while reading a multi-byte value ATOMIC_BLOCK(ATOMIC_RESTORESTATE) { return _usbLineInfo.dwDTERate; } @@ -232,6 +239,17 @@ bool Serial_::rts() { return _usbLineInfo.lineState & 0x2; } +int32_t Serial_::readBreak() { + int32_t ret; + // Disable IRQs while reading and clearing breakValue to make + // sure we don't overwrite a value just set by the ISR. + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) { + ret = breakValue; + breakValue = -1; + } + return ret; +} + Serial_ Serial; #endif /* if defined(USBCON) */ |