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Add partial project documentation to the incomplete PrinterHost demo.

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Change over Printer_GetDeviceID() to require a pointer to the destination buffer plus the buffer size, rather than using a pointer to a special structure.

Make new Printer_SendData() function to hide the implementation of sending data to an attached printer, cleaning up the main demo source file body.
This commit is contained in:
Dean Camera 2009-07-19 12:36:19 +00:00
parent d3fb6273aa
commit 786479faf0
7 changed files with 110 additions and 62 deletions
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14
Demos/Host/Incomplete/PrinterHost/ConfigDescriptor.c
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@ -61,7 +61,7 @@ uint8_t ProcessConfigurationDescriptor(void)
/* Get the printer interface from the configuration descriptor */
if ((ErrorCode = USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
NextBidirectionalPrinterInterface)))
DComp_NextBidirectionalPrinterInterface)))
{
/* Descriptor not found, error out */
return NoInterfaceFound;
@ -70,12 +70,12 @@ uint8_t ProcessConfigurationDescriptor(void)
PrinterInterfaceNumber = DESCRIPTOR_CAST(ConfigDescriptorData, USB_Descriptor_Interface_t).InterfaceNumber;
PrinterAltSetting = DESCRIPTOR_CAST(ConfigDescriptorData, USB_Descriptor_Interface_t).AlternateSetting;
/* Get the IN and OUT data endpoints for the mass storage interface */
/* Get the IN and OUT data endpoints for the printer interface */
while (FoundEndpoints != ((1 << PRINTER_DATA_OUT_PIPE) | (1 << PRINTER_DATA_IN_PIPE)))
{
/* Fetch the next bulk endpoint from the current printer interface */
if ((ErrorCode = USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
NextInterfaceBulkDataEndpoint)))
DComp_NextInterfaceBulkDataEndpoint)))
{
/* Descriptor not found, error out */
return NoEndpointFound;
@ -112,16 +112,16 @@ uint8_t ProcessConfigurationDescriptor(void)
return SuccessfulConfigRead;
}
uint8_t NextBidirectionalPrinterInterface(void* CurrentDescriptor)
uint8_t DComp_NextBidirectionalPrinterInterface(void* CurrentDescriptor)
{
/* PURPOSE: Find next Bidirectional protocol printer class interface descriptor */
/* PURPOSE: Find next bidirectional protocol printer class interface descriptor */
if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
{
/* Check the descriptor class and protocol, break out if correct class/protocol interface found */
if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == PRINTER_CLASS) &&
(DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == PRINTER_SUBCLASS) &&
(DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == PROTOCOL_BIDIRECTIONAL))
(DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == PRINTER_PROTOCOL))
{
return DESCRIPTOR_SEARCH_Found;
}
@ -130,7 +130,7 @@ uint8_t NextBidirectionalPrinterInterface(void* CurrentDescriptor)
return DESCRIPTOR_SEARCH_NotFound;
}
uint8_t NextInterfaceBulkDataEndpoint(void* CurrentDescriptor)
uint8_t DComp_NextInterfaceBulkDataEndpoint(void* CurrentDescriptor)
{
/* PURPOSE: Find next interface bulk endpoint descriptor before next interface descriptor */