void cdc_set_line_coding_data(void) { // JTR handling an OUT token In the CDC stack this is the only function that handles an OUT data stage.
unsigned long dwBaud, dwBaudrem;
memcpy(&linecodeing, (const void *) EP0_Outbdp->BDADDR, sizeof (struct cdc_LineCodeing));
dwBaud = BAUDCLOCK_FREQ / linecodeing.dwDTERate;
dwBaudrem = BAUDCLOCK_FREQ % linecodeing.dwDTERate;
if (linecodeing.dwDTERate > (dwBaudrem << 1))
dwBaud--;
UART_BAUD_setup(dwBaud);
usb_unset_out_handler(0); // Unregister OUT handler; JTR serious bug fix in macro!
usb_set_in_handler(0, cdc_set_line_coding_status); // JTR why bother?
usb_ack_dat1(0); // JTR common addition for STD and CLASS ACK
// JTR This part of the USB-CDC stack is worth highlighting
// This is the only place that we have an OUT DATA packet on
// EP0. At this point it has been completed. This stack unlike
// the microchip stack does not have a common IN or OUT data
// packet complete tail and therefore it is the responsibility
// of each section to ensure that EP0 is set-up correctly for
// the next setup packet.
// Force EP0 OUT to the DAT0 state
// after we have all our data packets.
EP0_Outbdp->BDCNT = USB_EP0_BUFFER_SIZE;
EP0_Outbdp->BDSTAT = UOWN | DTSEN;
}
void cdc_set_line_coding_data(void) { // JTR handling an OUT token In the CDC stack this is the only function that handles an OUT data stage.
memcpy(&linecodeing, (const void *) bdp->BDADDR, sizeof (struct cdc_LineCodeing));
usb_unset_out_handler(0); // Unregister OUT handler; JTR serious bug fix in macro!
usb_set_in_handler(0, cdc_set_line_coding_status); // JTR why bother?
usb_ack_dat1(rbdp, 0); // JTR common addition for STD and CLASS ACK
// JTR This part of the USB-CDC stack is worth highlighting
// This is the only place that we have an OUT DATA packet on
// EP0. At this point it has been completed. This stack unlike
// the microchip stack does not have a common IN or OUT data
// packet complete tail and therefore it is the responsibility
// of each section to ensure that EP0 is set-up correctly for
// the next setup packet.
// This next line inverts the DTS so that it is now ready for
// a DAT0 packet. However it only works because we had one data
// packet. For any amount of EVEN data packets it would not be
// correct.
// usb_ack_out(bdp); // JTR N/A Good for only odd number of data packets.
// The correct thing to do is to force EP0 OUT to the DAT0 state
// after we have all our data packets.
bdp->BDCNT = USB_EP0_BUFFER_SIZE;
bdp->BDSTAT = UOWN | DTSEN;
}
void user_configured_init(void) {
// JTR NEW FUNCTION
// After the device is enumerated and configured then we set up non EP0 endpoints.
// We only enable the endpoints we are using, not all of them.
// Prior to this they are held in a disarmed state.
// This function belongs to the current USB function and IS NOT generic. This is CLASS specific
// and will vary from implementation to implementation.
usb_unset_in_handler(1);
usb_unset_in_handler(2);
usb_unset_out_handler(2);
USB_UEP1 = USB_EP_IN;
USB_UEP2 = USB_EP_INOUT;
/* Configure buffer descriptors */
#if USB_PP_BUF_MODE == 0
// JTR Setup CDC LINE_NOTICE EP (Interrupt IN)
usb_bdt[USB_CALC_BD(1, USB_DIR_IN, USB_PP_EVEN)].BDCNT = 0;
usb_bdt[USB_CALC_BD(1, USB_DIR_IN, USB_PP_EVEN)].BDADDR = cdc_acm_in_buffer;
usb_bdt[USB_CALC_BD(1, USB_DIR_IN, USB_PP_EVEN)].BDSTAT = DTS + DTSEN; // Set DTS => First packet inverts, ie. is Data0
#else
// TODO: Implement Ping-Pong buffering setup.
#error "PP Mode not implemented yet"
#endif
usb_register_class_setup_handler(cdc_setup);
cdc_trf_state = 0;
CDC_Outbdp = &usb_bdt[USB_CALC_BD(2, USB_DIR_OUT, USB_PP_EVEN)];
CDC_Inbdp = &usb_bdt[USB_CALC_BD(2, USB_DIR_IN, USB_PP_EVEN)];
IsInBufferA = 0xFF;
InPtr = cdc_In_bufferA;
cdc_In_len = 0;
CDC_Inbdp->BDADDR = &cdc_In_bufferA[0];
CDC_Inbdp->BDCNT = 0;
CDC_Inbdp->BDSTAT = DTS + DTSEN;
cdc_Out_len = 0;
IsOutBufferA = 0xFF;
OutPtr = cdc_Out_bufferA;
CDC_Outbdp->BDCNT = CDC_BUFFER_SIZE;
CDC_Outbdp->BDADDR = &cdc_Out_bufferA[0];
CDC_Outbdp->BDSTAT = UOWN + DTSEN;
}
void user_configured_init(void) {
// JTR NEW FUNCTION
// After the device is enumerated and configured then we set up non EP0 endpoints.
// We only enable the endpoints we are using, not all of them.
// Prior to this they are held in a disarmed state.
// This function belongs to the current USB function and IS NOT generic. This is CLASS specific
// and will vary from implementation to implementation.
usb_unset_in_handler(1);
usb_unset_in_handler(2);
usb_unset_out_handler(2); // JTR Macro has bug fix
// JTR remove all USB_UEP[x] indexing from stack due to pointer bug (fixed?).
// JTR experiment is the UEPx pointer system working? Lets try!
// PASSED on PIC24
//USB_UEP[1] = USB_EP_IN;
//USB_UEP[2] = USB_EP_INOUT;
USB_UEP1 = USB_EP_IN;
USB_UEP2 = USB_EP_INOUT;
/* Configure buffer descriptors */
#if USB_PP_BUF_MODE == 0
// JTR Setup CDC LINE_NOTICE EP (Interrupt IN)
usb_bdt[USB_CALC_BD(1, USB_DIR_IN, USB_PP_EVEN)].BDCNT = 0;
usb_bdt[USB_CALC_BD(1, USB_DIR_IN, USB_PP_EVEN)].BDADDR = cdc_acm_in_buffer;
usb_bdt[USB_CALC_BD(1, USB_DIR_IN, USB_PP_EVEN)].BDSTAT = DTS + DTSEN; // Set DTS => First packet inverts, ie. is Data0
usb_bdt[USB_CALC_BD(2, USB_DIR_OUT, USB_PP_EVEN)].BDCNT = CDC_BUFFER_SIZE; // JTR N/A endpoints[i].buffer_size;
usb_bdt[USB_CALC_BD(2, USB_DIR_OUT, USB_PP_EVEN)].BDADDR = cdc_Out_buffer;
usb_bdt[USB_CALC_BD(2, USB_DIR_OUT, USB_PP_EVEN)].BDSTAT = UOWN + DTSEN;
usb_bdt[USB_CALC_BD(2, USB_DIR_IN, USB_PP_EVEN)].BDCNT = 0;
usb_bdt[USB_CALC_BD(2, USB_DIR_IN, USB_PP_EVEN)].BDADDR = cdc_In_buffer;
usb_bdt[USB_CALC_BD(2, USB_DIR_IN, USB_PP_EVEN)].BDSTAT = DTS + DTSEN; // Set DTS => First packet inverts, ie. is Data0
#else
// TODO: Implement Ping-Pong buffering setup.
#error "PP Mode not implemented yet"
#endif
usb_register_class_setup_handler(cdc_setup);
Outbdp = &usb_bdt[USB_CALC_BD(2, USB_DIR_OUT, USB_PP_EVEN)];
Inbdp = &usb_bdt[USB_CALC_BD(2, USB_DIR_IN, USB_PP_EVEN)];
}
void usb_init(ROMPTR const BYTE *device_descriptor,
ROMPTR const BYTE *config_descriptor,
ROMPTR const BYTE *string_descriptor,
int num_string_descriptors) {
usb_device_descriptor = device_descriptor;
usb_config_descriptor = config_descriptor;
usb_string_descriptor = string_descriptor;
usb_num_string_descriptors = num_string_descriptors;
sof_handler = NULL;
class_setup_handler = NULL;
vendor_setup_handler = NULL;
usb_unset_in_handler(0);
usb_unset_out_handler(0);
ClearUSBtoDefault();
ConfigureUsbHardware();
EnablePacketTransfer();
}
void usb_init(ROMPTR const unsigned char *device_descriptor,
ROMPTR const unsigned char *config_descriptor,
ROMPTR const unsigned char *string_descriptor,
int num_string_descriptors) {
int i;
usb_device_descriptor = device_descriptor;
usb_config_descriptor = config_descriptor;
usb_string_descriptor = string_descriptor;
usb_num_string_descriptors = num_string_descriptors;
SetUsbAddress(0); // JTR added here. Probably not required though
ResetPPbuffers();
DisableUsbInterrupts();
DisableAllUsbInterrupts();
ClearAllUsbErrorInterruptFlags();
ClearAllUsbInterruptFlags();
ConfigureUsbHardware();
sof_handler = NULL;
class_setup_handler = NULL;
vendor_setup_handler = NULL;
for (i = 0; i < MAX_CHIP_EP; i++) {
endpoints[i].out_handler = NULL;
endpoints[i].in_handler = NULL;
}
// Register ep0 - no handlers
usb_unset_in_handler(0);
usb_unset_out_handler(0);
// JTR All UEPx SPRs are hard coded. I cannot see much point of tables or indexing for these.
// On the PIC16C765 such indexing was required for the STALL bit but now the STALL feature
// is in the Buffer descriptor table not in the UEPx SPRs.
// See changes to "USB_REQUEST_GET_STATUS"
// USB_UEP[0] = endpoints[0].type;
USB_UEP0 = USB_EP_CONTROL;
/* Configure endpoints TODO: Only ep0 ? */
// JTR Right! code for other end points snipped...At this point we are only setting up EP0
#ifdef USB_SELF_POWERED
usb_device_status = 0x0001;
#else
usb_device_status = 0x0000;
#endif
usb_device_state = 0x00; // JTR added flag byte for enumeration state
usb_current_cfg = 0; // JTR formally usb_configured
usb_addr_pending = 0x00;
#if USB_PP_BUF_MODE == 0
usb_bdt[USB_CALC_BD(0, USB_DIR_OUT, USB_PP_EVEN)].BDCNT = USB_EP0_BUFFER_SIZE; // JTR endpoints[0].buffer_size; same thing done more obviously
usb_bdt[USB_CALC_BD(0, USB_DIR_OUT, USB_PP_EVEN)].BDADDR = usb_ep0_out_buf; //endpoints[0].out_buffer;
usb_bdt[USB_CALC_BD(0, USB_DIR_OUT, USB_PP_EVEN)].BDSTAT = UOWN + DTSEN;
usb_bdt[USB_CALC_BD(0, USB_DIR_IN, USB_PP_EVEN)].BDCNT = 0;
usb_bdt[USB_CALC_BD(0, USB_DIR_IN, USB_PP_EVEN)].BDADDR = usb_ep0_in_buf; //endpoints[0].in_buffer;
usb_bdt[USB_CALC_BD(0, USB_DIR_IN, USB_PP_EVEN)].BDSTAT = DTS; // Set DTS => First packet inverts, ie. is Data0
#else
// TODO: Implement Ping-Pong buffering setup.
#error "PP Mode not implemented yet"
#endif
}
