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Device status functions must treat device pointer as volatile

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This commit is contained in:
PaulStoffregen 2017-12-15 07:18:14 -08:00
parent ef1452ad84
commit 8f09965162
1 changed files with 28 additions and 15 deletions
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43
USBHost_t36.h
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@ -381,21 +381,34 @@ protected:
// All USB device drivers inherit from this base class.
class USBDriver : public USBHost {
public:
operator bool() { return (device != nullptr); }
uint16_t idVendor() { return (device != nullptr) ? device->idVendor : 0; }
uint16_t idProduct() { return (device != nullptr) ? device->idProduct : 0; }
const uint8_t *manufacturer()
{ return ((device == nullptr) || (device->strbuf == nullptr)) ? nullptr : &device->strbuf->buffer[device->strbuf->iStrings[strbuf_t::STR_ID_MAN]]; }
const uint8_t *product()
{ return ((device == nullptr) || (device->strbuf == nullptr)) ? nullptr : &device->strbuf->buffer[device->strbuf->iStrings[strbuf_t::STR_ID_PROD]]; }
const uint8_t *serialNumber()
{ return ((device == nullptr) || (device->strbuf == nullptr)) ? nullptr : &device->strbuf->buffer[device->strbuf->iStrings[strbuf_t::STR_ID_SERIAL]]; }
// TODO: user-level functions
// check if device is bound/active/online
// query vid, pid
// query string: manufacturer, product, serial number
//operator bool() { return (*(Device_t * volatile *)&device != nullptr); }
operator bool() {
Device_t *dev = *(Device_t * volatile *)&device;
return dev != nullptr;
}
uint16_t idVendor() {
Device_t *dev = *(Device_t * volatile *)&device;
return (device != nullptr) ? device->idVendor : 0;
}
uint16_t idProduct() {
Device_t *dev = *(Device_t * volatile *)&device;
return (device != nullptr) ? device->idProduct : 0;
}
const uint8_t *manufacturer() {
Device_t *dev = *(Device_t * volatile *)&device;
if (dev == nullptr || dev->strbuf == nullptr) return nullptr;
return &dev->strbuf->buffer[dev->strbuf->iStrings[strbuf_t::STR_ID_MAN]];
}
const uint8_t *product() {
Device_t *dev = *(Device_t * volatile *)&device;
if (dev == nullptr || dev->strbuf == nullptr) return nullptr;
return &dev->strbuf->buffer[dev->strbuf->iStrings[strbuf_t::STR_ID_PROD]];
}
const uint8_t *serialNumber() {
Device_t *dev = *(Device_t * volatile *)&device;
if (dev == nullptr || dev->strbuf == nullptr) return nullptr;
return &dev->strbuf->buffer[dev->strbuf->iStrings[strbuf_t::STR_ID_SERIAL]];
}
protected:
USBDriver() : next(NULL), device(NULL) {}
// Check if a driver wishes to claim a device or interface or group