//!
//! @brief This function receives nb_data bytes pointed to by ptr_buf on the specified pipe.
//!
//! *nb_data is updated with the final number of data bytes received.
//!
//! @param pipe
//! @param nb_data
//! @param ptr_buf
//! @param handler Call-back function pointer
//!
//! @return bool: Status
//!
bool host_get_data_interrupt(uint8_t pipe, uint16_t nb_data, void *ptr_buf, Pipe_handler *handler)
{
bool sav_glob_int_en;
if (it_pipe_str[pipe].enable) return false;
if (!is_any_interrupt_pipe_active())
{
g_sav_int_sof_enable = Is_host_sof_interrupt_enabled();
Host_enable_sof_interrupt();
}
it_pipe_str[pipe].enable = true;
it_pipe_str[pipe].nb_byte_to_process = nb_data;
it_pipe_str[pipe].nb_byte_processed = 0;
it_pipe_str[pipe].ptr_buf = ptr_buf;
it_pipe_str[pipe].handler = handler;
it_pipe_str[pipe].timeout = 0;
it_pipe_str[pipe].nak_timeout = NAK_RECEIVE_TIMEOUT;
private_sof_counter = 0; // Reset the counter in SOF detection subroutine
if ((sav_glob_int_en = cpu_irq_is_enabled())) cpu_irq_disable();
Host_reset_pipe(pipe);
Host_ack_stall(pipe);
Host_ack_nak_received(pipe);
(void)Is_host_nak_received(pipe);
if (sav_glob_int_en) cpu_irq_enable();
Host_enable_stall_interrupt(pipe);
#if NAK_TIMEOUT_ENABLE == ENABLE
Host_enable_nak_received_interrupt(pipe);
#endif
Host_enable_pipe_error_interrupt(pipe);
Host_enable_in_received_interrupt(pipe);
Host_enable_pipe_interrupt(pipe);
Host_enable_continuous_in_mode(pipe);
Host_configure_pipe_token(pipe, TOKEN_IN);
Host_ack_in_received(pipe);
Host_unfreeze_pipe(pipe);
return true;
}
/**
* @brief This function receives nb_data pointed with *buf with the pipe number specified
*
* The nb_data parameter is passed as a U16 pointer, thus the data pointed by this pointer
* is updated with the final number of data byte received.
*
* @param pipe
* @param nb_data
* @param buf
* @param handle call back function pointer
*
* @return status
*/
U8 host_get_data_interrupt(U8 pipe, U16 nb_data, U8 *buf,void(*handle)(U8 status, U16 nb_byte))
{
Host_select_pipe(pipe);
if(it_pipe_str[pipe].enable==ENABLE)
{
return HOST_FALSE;
}
else
{
if(is_any_interrupt_pipe_active()==FALSE)
{
g_sav_int_sof_enable=Is_host_sof_interrupt_enabled();
Host_enable_sof_interrupt();
}
it_pipe_str[pipe].enable=ENABLE;
it_pipe_str[pipe].nb_byte_to_process=nb_data;
it_pipe_str[pipe].nb_byte_processed=0;
it_pipe_str[pipe].ptr_buf=buf;
it_pipe_str[pipe].handle=handle;
it_pipe_str[pipe].timeout=0;
it_pipe_str[pipe].nak_timeout=NAK_RECEIVE_TIMEOUT;
private_sof_counter=0; // Reset the counter in SOF detection sub-routine
Host_reset_pipe(pipe);
Host_enable_stall_interrupt();
#if (NAK_TIMEOUT_ENABLE==ENABLE)
Host_enable_nak_interrupt();
#endif
Host_enable_error_interrupt();
Host_enable_receive_interrupt();
Host_ack_stall();
Host_ack_nak_received();
Host_continuous_in_mode();
Host_set_token_in();
Host_ack_in_received();
Host_unfreeze_pipe();
return HOST_TRUE;
}
}
void host_mouse_hid_task(void)
#endif
{
uint8_t i;
#ifdef FREERTOS_USED
portTickType xLastWakeTime;
xLastWakeTime = xTaskGetTickCount();
while (true)
{
vTaskDelayUntil(&xLastWakeTime, configTSK_USB_HHID_MOUSE_PERIOD);
#endif // FREERTOS_USED
// First, check the host controller is in full operating mode with the
// B-device attached and enumerated
if (Is_host_ready())
{
// New device connection (executed only once after device connection)
if (mouse_hid_new_device_connected)
{
mouse_hid_new_device_connected = false;
// For all supported interfaces
for (i = 0; i < Get_nb_supported_interface(); i++)
{
if(Get_class(i)==HID_CLASS && Get_protocol(i)==MOUSE_PROTOCOL)
{
host_hid_set_idle(HID_IDLE_DURATION_INDEFINITE, HID_REPORT_ID_ALL, i);
host_hid_get_report(HID_REPORT_DESCRIPTOR, 0, i);
pipe_mouse_in = Get_ep_pipe(i, 0);
Host_enable_continuous_in_mode(pipe_mouse_in);
Host_unfreeze_pipe(pipe_mouse_in);
mouse_hid_connected=true;
break;
}
}
}
if( Is_host_mouse_hid_configured() )
{
if((Is_host_in_received(pipe_mouse_in)) && (Is_host_stall(pipe_mouse_in)==false) )
{
Host_reset_pipe_fifo_access(pipe_mouse_in);
usb_report[0]=
usb_report[1]=
usb_report[2]=
usb_report[3]=0;
host_read_p_rxpacket(pipe_mouse_in, (void*)usb_report, 4, NULL);
Host_ack_in_received(pipe_mouse_in);
Host_free_in(pipe_mouse_in);
new_x = usb_report[1];
new_y = usb_report[2];
mouse_x += new_x;
mouse_y += new_y;
if( mouse_x<MOUSE_X_MIN ) mouse_x=MOUSE_X_MIN;
else if( mouse_x>MOUSE_X_MAX ) mouse_x=MOUSE_X_MAX;
if( mouse_y<MOUSE_Y_MIN ) mouse_y=MOUSE_Y_MIN;
else if( mouse_y>MOUSE_Y_MAX ) mouse_y=MOUSE_Y_MAX;
mouse_b0=usb_report[0] & 1;
mouse_b1=usb_report[0] & 2;
mouse_b2=usb_report[0] & 4;
disp_led_mouse();
disp_ascii_mouse();
}
if(Is_host_nak_received(pipe_mouse_in))
{
Host_ack_nak_received(pipe_mouse_in);
LED_Off(LED_HOST_MOUSE_B0 );
LED_Off(LED_HOST_MOUSE_B1 );
LED_Off(LED_HOST_MOUSE_B2 );
LED_Off(LED_HOST_MOUSE_B3 );
}
}
}
#ifdef FREERTOS_USED
}
#endif
}
//!
//! @brief This function receives nb_data bytes pointed to by ptr_buf on the specified pipe.
//!
//! *nb_data is updated with the final number of data bytes received.
//!
//! @note This function activates the host SOF interrupt to detect time-outs.
//! The initial enable state of this interrupt will be restored.
//!
//! @param pipe
//! @param nb_data
//! @param ptr_buf
//!
//! @return Status_t: Pipe status
//!
Status_t host_get_data(uint8_t pipe, uint16_t *nb_data, void *ptr_buf)
{
Status_t status = PIPE_GOOD; // Frame correctly received by default
bool sav_int_sof_enable;
bool sav_glob_int_en;
uint8_t nak_timeout;
uint16_t n, i;
#if NAK_TIMEOUT_ENABLE == ENABLE
uint16_t cpt_nak;
#endif
n = *nb_data;
sav_int_sof_enable = Is_host_sof_interrupt_enabled();
Host_enable_sof_interrupt();
Host_enable_continuous_in_mode(pipe);
Host_configure_pipe_token(pipe, TOKEN_IN);
Host_ack_in_received(pipe);
while (n) // While missing data...
{
Host_free_in(pipe);
Host_unfreeze_pipe(pipe);
private_sof_counter = 0; // Reset the counter in SOF detection subroutine
nak_timeout = 0;
#if NAK_TIMEOUT_ENABLE == ENABLE
cpt_nak = 0;
#endif
while (!Is_host_in_received(pipe))
{
if (Is_host_emergency_exit()) // Asynchronous disconnection or role exchange detected under interrupt
{
status = PIPE_DELAY_TIMEOUT;
Host_reset_pipe(pipe);
goto host_get_data_end;
}
#if TIMEOUT_DELAY_ENABLE == ENABLE
if (private_sof_counter >= 250) // Time-out management
{
private_sof_counter = 0; // Done in host SOF interrupt
if (nak_timeout++ >= TIMEOUT_DELAY) // Check for local time-out
{
status = PIPE_DELAY_TIMEOUT;
Host_reset_pipe(pipe);
goto host_get_data_end;
}
}
#endif
if (Is_host_pipe_error(pipe)) // Error management
{
status = Host_error_status(pipe);
Host_ack_all_errors(pipe);
goto host_get_data_end;
}
if (Is_host_stall(pipe)) // STALL management
{
status = PIPE_STALL;
Host_reset_pipe(pipe);
Host_ack_stall(pipe);
goto host_get_data_end;
}
#if NAK_TIMEOUT_ENABLE == ENABLE
if (Is_host_nak_received(pipe)) // NAK received
{
Host_ack_nak_received(pipe);
if (cpt_nak++ > NAK_RECEIVE_TIMEOUT)
{
status = PIPE_NAK_TIMEOUT;
Host_reset_pipe(pipe);
goto host_get_data_end;
}
}
#endif
}
Host_freeze_pipe(pipe);
Host_reset_pipe_fifo_access(pipe);
i = Host_get_pipe_size(pipe) - Host_byte_count(pipe);
if (!ptr_buf)
{
if (Host_byte_count(pipe) > n) // More bytes received than expected
{
n = 0;
//! @todo Error code management
}
else // Nb bytes received <= expected
{
n -= Host_byte_count(pipe);
if (i) // Short packet
{
*nb_data -= n;
n = 0;
}
}
}
else
{
n = host_read_p_rxpacket(pipe, ptr_buf, n, &ptr_buf);
if (Host_byte_count(pipe)) // More bytes received than expected
{
//! @todo Error code management
}
else if (i) // Short packet with nb bytes received <= expected
{
*nb_data -= n;
n = 0;
}
}
Host_ack_in_received(pipe);
// In low-speed mode, the USB IP may have not yet sent the ACK at this
// point. The USB IP does not support a new start of transaction request
// from the firmware if the ACK has not been sent. The only means of making
// sure the ACK has been sent is to wait for the next Keep-Alive before
// starting a new transaction.
if (Is_usb_low_speed_mode())
{
Usb_ack_event(EVT_HOST_SOF);
sav_int_sof_enable = Is_host_sof_interrupt_enabled();
if ((sav_glob_int_en = cpu_irq_is_enabled())) cpu_irq_disable();
Host_ack_sof();
(void)Is_host_sof_interrupt_enabled();
if (sav_glob_int_en) cpu_irq_enable();
Host_enable_sof_interrupt();
while (!Is_usb_event(EVT_HOST_SOF)) // Wait for next Keep-Alive
{
if (Is_host_emergency_exit())
{
status = PIPE_DELAY_TIMEOUT;
Host_reset_pipe(pipe);
goto host_get_data_end;
}
}
if (!sav_int_sof_enable) // Restore SOF interrupt enable
{
if ((sav_glob_int_en = cpu_irq_is_enabled())) cpu_irq_disable();
Host_disable_sof_interrupt();
(void)Is_host_sof_interrupt_enabled();
if (sav_glob_int_en) cpu_irq_enable();
}
}
}
host_get_data_end:
Host_freeze_pipe(pipe);
// Restore SOF interrupt enable state
if (!sav_int_sof_enable)
{
if ((sav_glob_int_en = cpu_irq_is_enabled())) cpu_irq_disable();
Host_disable_sof_interrupt();
(void)Is_host_sof_interrupt_enabled();
if (sav_glob_int_en) cpu_irq_enable();
}
// And return...
return status;
}
//!
//! @brief USB pipe interrupt subroutine
//!
void usb_pipe_interrupt(uint8_t pipe)
{
void *ptr_buf;
uint16_t n, i;
bool callback = false;
// Detect which events generate an interrupt...
if (Is_host_pipe_error(pipe)) // Error management
{
it_pipe_str[pipe].status = Host_error_status(pipe);
it_pipe_str[pipe].enable = false;
Host_reset_pipe(pipe);
Host_ack_all_errors(pipe);
callback = true;
goto usb_pipe_interrupt_end;
}
if (Is_host_stall(pipe)) // STALL management
{
it_pipe_str[pipe].status = PIPE_STALL;
it_pipe_str[pipe].enable = false;
Host_reset_pipe(pipe);
callback = true;
goto usb_pipe_interrupt_end;
}
#if NAK_TIMEOUT_ENABLE == ENABLE
if (Is_host_nak_received(pipe)) // NAK received
{
Host_ack_nak_received(pipe);
// Check if NAK time-out error occurs (not for interrupt pipes)
if (!--it_pipe_str[pipe].nak_timeout && Host_get_pipe_type(pipe) != TYPE_INTERRUPT)
{
it_pipe_str[pipe].status = PIPE_NAK_TIMEOUT;
it_pipe_str[pipe].enable = false;
Host_reset_pipe(pipe);
callback = true;
goto usb_pipe_interrupt_end;
}
}
#endif
if (Is_host_in_received(pipe)) // Pipe IN reception?
{
ptr_buf = (uint8_t *)it_pipe_str[pipe].ptr_buf + it_pipe_str[pipe].nb_byte_processed; // Build pointer to data buffer
n = it_pipe_str[pipe].nb_byte_to_process - it_pipe_str[pipe].nb_byte_processed; // Remaining data bytes
Host_freeze_pipe(pipe);
Host_reset_pipe_fifo_access(pipe);
i = Host_get_pipe_size(pipe) - Host_byte_count(pipe);
n = host_read_p_rxpacket(pipe, ptr_buf, n, NULL);
it_pipe_str[pipe].nb_byte_processed = it_pipe_str[pipe].nb_byte_to_process - n;
if (Host_byte_count(pipe)) // More bytes received than expected
{
//! @todo Error code management
}
else if (i) // Short packet with nb bytes received <= expected
{
n = 0;
}
Host_ack_in_received(pipe);
if (n) // Still data to process
{
Host_free_in(pipe);
Host_unfreeze_pipe(pipe); // Request another IN transfer
private_sof_counter = 0; // Reset the counter in SOF detection subroutine
it_pipe_str[pipe].timeout = 0; // Reset time-out
it_pipe_str[pipe].nak_timeout = NAK_RECEIVE_TIMEOUT;
}
else // End of transfer
{
it_pipe_str[pipe].enable = false;
it_pipe_str[pipe].status = PIPE_GOOD;
Host_reset_pipe(pipe);
callback = true;
}
}
if (Is_host_out_ready(pipe)) // Pipe OUT sent?
{
Host_ack_out_ready(pipe);
it_pipe_str[pipe].nb_byte_processed += it_pipe_str[pipe].nb_byte_on_going;
it_pipe_str[pipe].nb_byte_on_going = 0;
ptr_buf = (uint8_t *)it_pipe_str[pipe].ptr_buf + it_pipe_str[pipe].nb_byte_processed; // Build pointer to data buffer
n = it_pipe_str[pipe].nb_byte_to_process - it_pipe_str[pipe].nb_byte_processed; // Remaining data bytes
if (n) // Still data to process
{
Host_unfreeze_pipe(pipe);
// Prepare data to be sent
Host_reset_pipe_fifo_access(pipe);
it_pipe_str[pipe].nb_byte_on_going = n - host_write_p_txpacket(pipe, ptr_buf, n, NULL);
private_sof_counter = 0; // Reset the counter in SOF detection subroutine
it_pipe_str[pipe].timeout = 0; // Refresh time-out counter
it_pipe_str[pipe].nak_timeout = NAK_SEND_TIMEOUT;
Host_send_out(pipe); // Send the USB frame
}
else // End of transfer
{
it_pipe_str[pipe].enable = false; // Transfer end
it_pipe_str[pipe].status = PIPE_GOOD; // Status OK
Host_reset_pipe(pipe);
callback = true;
}
}
usb_pipe_interrupt_end:
if (!is_any_interrupt_pipe_active() && !g_sav_int_sof_enable) // If no more transfer is armed
{
Host_disable_sof_interrupt();
}
if (callback) // Any call-back function to perform?
{
it_pipe_str[pipe].handler(it_pipe_str[pipe].status, it_pipe_str[pipe].nb_byte_processed);
}
}
/**
* @brief This function receives nb_data pointed with *buf with the pipe number specified
*
* The nb_data parameter is passed as a U16 pointer, thus the data pointed by this pointer
* is updated with the final number of data byte received.
*
* @param pipe
* @param nb_data
* @param buf
*
* @return status
*/
U8 host_get_data(U8 pipe, U16 *nb_data, U8 *buf)
{
U8 status=PIPE_GOOD;
U8 sav_int_sof_enable;
U8 nak_timeout;
U16 n,i;
U16 cpt_nak;
#if (USER_PERIODIC_PIPE==ENABLE)
freeze_user_periodic_pipe();
#endif
n=*nb_data;
*nb_data=0;
sav_int_sof_enable=Is_host_sof_interrupt_enabled();
Host_enable_sof_interrupt();
Host_select_pipe(pipe);
Host_continuous_in_mode();
Host_set_token_in();
Host_ack_in_received();
while (n) // While missing data...
{
Host_unfreeze_pipe();
Host_send_in();
private_sof_counter=0; // Reset the counter in SOF detection sub-routine
nak_timeout=0;
cpt_nak=0;
while (!Is_host_in_received())
{
if (Is_host_emergency_exit()) // Async disconnection or role change detected under interrupt
{
status=PIPE_DELAY_TIMEOUT;
Host_reset_pipe(pipe);
goto host_get_data_end;
}
#if (TIMEOUT_DELAY_ENABLE==ENABLE)
if (private_sof_counter>=250) // Timeout management
{
private_sof_counter=0; // Done in host SOF interrupt
if (nak_timeout++>=TIMEOUT_DELAY)// Check for local timeout
{
status=PIPE_DELAY_TIMEOUT;
Host_reset_pipe(pipe);
goto host_get_data_end;
}
}
#endif
if(Is_host_pipe_error()) // Error management
{
status = Host_error_status();
Host_ack_all_errors();
goto host_get_data_end;
}
if(Is_host_stall()) // STALL management
{
if( Is_host_in_received() )
break;
status =PIPE_STALL;
Host_reset_pipe(pipe);
Host_ack_stall();
goto host_get_data_end;
}
#if (NAK_TIMEOUT_ENABLE==ENABLE)
if(Is_host_nak_received()) //NAK received
{
Host_ack_nak_received();
if (cpt_nak++>NAK_RECEIVE_TIMEOUT)
{
status = PIPE_NAK_TIMEOUT;
Host_reset_pipe(pipe);
goto host_get_data_end;
}
}
#endif
}
status=PIPE_GOOD;
Host_freeze_pipe();
if (Host_byte_counter()<=n)
{
if ((Host_byte_counter() < n)&&(Host_byte_counter()<Host_get_pipe_length()))
{ n=0;}
else
{ n-=Host_byte_counter();}
(*nb_data)+=Host_byte_counter(); // Update nb of byte received
if( NULL != buf )
{
for (i=Host_byte_counter();i;i--)
{ *buf=Host_read_byte(); buf++;}
}
}
else // more bytes received than expected
{ // TODO error code management
*nb_data+=n;
if( NULL != buf )
{
for (i=n;i;i--) // Byte number limited to the initial request (limit tab over pb)
{ *buf=Host_read_byte(); buf++; }
}
n=0;
}
Host_ack_in_received();
}
Host_freeze_pipe();
host_get_data_end:
if (sav_int_sof_enable==FALSE)
{
Host_disable_sof_interrupt();
}
#if (USER_PERIODIC_PIPE==ENABLE)
unfreeze_user_periodic_pipe();
#endif
return ((U8)status);
}
/**
* @brief Entry point of the USB host management
*
* The aim is to manage the device target connection and enumeration
* depending on the device_state, the function performs the required operations
* to get the device enumerated and configured
* Once the device is operationnal, the device_state value is DEVICE_READY
* This state should be tested by the host task application before performing
* any applicative requests to the device.
*
* @param none
*
* @return none
*
* \image html host_task.gif
*/
void usb_host_task(void)
{
switch (device_state)
{
//------------------------------------------------------
// DEVICE_UNATTACHED state
//
// - Default init state
// - Try to give device power supply
//
case DEVICE_UNATTACHED:
Host_clear_device_supported(); // Reset Device status
Host_clear_configured();
Host_clear_device_ready();
Usb_clear_all_event(); // Clear all software events
new_device_connected=FALSE;
selected_device=0;
#if (USB_HUB_SUPPORT==ENABLE)
nb_hub_present = 0;
#endif
#if (SOFTWARE_VBUS_CTRL==ENABLE)
if( Is_usb_bconnection_error_interrupt()||Is_usb_vbus_error_interrupt())
{
Usb_ack_bconnection_error_interrupt();
Usb_ack_vbus_error_interrupt();
Host_clear_vbus_request();
}
Usb_disable_vbus_pad();
Usb_enable_manual_vbus();
if(Is_usb_srp_interrupt())
{
Usb_ack_srp_interrupt();
Usb_enable_vbus_pad();
Usb_enable_vbus();
device_state=DEVICE_ATTACHED;
}
#else
Usb_enable_vbus(); // Give at least device power supply!!!
if(Is_usb_vbus_high())
{ device_state=DEVICE_ATTACHED; } // If VBUS ok goto to device connection expectation
#endif
break;
//------------------------------------------------------
// DEVICE_ATTACHED state
//
// - Vbus is on
// - Try to detected device connection
//
case DEVICE_ATTACHED :
if (Is_device_connection() || (force_enumeration==TRUE)) // Device pull-up detected
{
Host_ack_device_connection();
Host_clear_device_supported(); // Reset Device status
Host_clear_configured();
Host_clear_device_ready();
Usb_clear_all_event(); // Clear all software events
new_device_connected=FALSE;
force_enumeration=FALSE;
// Now device is connected, enable disconnection interrupt
Host_enable_device_disconnection_interrupt();
Enable_interrupt();
// Reset device status
Host_clear_device_supported();
Host_clear_configured();
Host_clear_device_ready();
Host_enable_sof(); // Start Start Of Frame generation
Host_enable_sof_interrupt(); // SOF will be detected under interrupt
c = 0;
while (c<100) // wait 100ms before USB reset
{
if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; }// Count Start Of frame
if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {goto device_attached_error;}
}
Host_disable_device_disconnection_interrupt();
Host_send_reset(); // First USB reset
Usb_ack_event(EVT_HOST_SOF);
while (Is_host_reset()); // Active wait of end of reset send
Host_ack_reset();
//Workaround for some bugly devices with powerless pull up
//usually low speed where data line rise slowly and can be interpretaded as disconnection
for(c=0;c!=0xFFFF;c++) // Basic Timeout counter
{
if(Is_usb_event(EVT_HOST_SOF)) //If we detect SOF, device is still alive and connected, just clear false disconnect flag
{
if(Is_device_disconnection())
{
Host_ack_device_connection();
Host_ack_device_disconnection();
break;
}
}
}
Host_enable_device_disconnection_interrupt();
// All USB pipes must be reconfigured after a USB reset generation
host_configure_pipe(PIPE_CONTROL, \
TYPE_CONTROL, \
TOKEN_SETUP, \
EP_CONTROL, \
SIZE_64, \
ONE_BANK, \
0 );
c = 0;
while (c<100) // wait 100ms after USB reset
{
if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; }// Count Start Of frame
if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {goto device_attached_error;}
}
device_state = DEVICE_POWERED;
c=0;
}
device_attached_error:
// Device connection error, or vbus pb -> Retry the connection process from the begining
if( Is_usb_bconnection_error_interrupt()||Is_usb_vbus_error_interrupt()||Is_usb_vbus_low())
{
Usb_ack_bconnection_error_interrupt();
Usb_enable_vbus_hw_control();
device_state=DEVICE_UNATTACHED;
Usb_disable_vbus();
Usb_disable_vbus_pad();
Usb_enable_vbus_pad();
Usb_ack_vbus_error_interrupt();
Usb_enable_vbus();
Usb_disable_vbus_hw_control();
Host_disable_sof();
}
break;
//------------------------------------------------------
// DEVICE_POWERED state
//
// - Device connection (attach) as been detected,
// - Wait 100ms and configure default control pipe
//
case DEVICE_POWERED :
LOG_STR_CODE(log_device_connected);
Host_device_connection_action();
if (Is_usb_event(EVT_HOST_SOF))
{
Usb_ack_event(EVT_HOST_SOF);
if (c++ >= 100) // Wait 100ms
{
device_state = DEVICE_DEFAULT;
}
}
break;
//------------------------------------------------------
// DEVICE_DEFAULT state
//
// - Get device descriptor
// - Reconfigure Pipe 0 according to Device EP0
// - Attribute device address
//
case DEVICE_DEFAULT :
// Get first device descriptor
Host_select_device(0);
usb_tree.device[0].ep_ctrl_size=8;
if( CONTROL_GOOD == host_get_device_descriptor_uncomplete())
{
c = 0;
while(c<20) // wait 20ms before USB reset (special buggly devices...)
{
if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; }
if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {break;}
}
Host_disable_device_disconnection_interrupt();
Host_send_reset(); // First USB reset
Usb_ack_event(EVT_HOST_SOF);
while (Is_host_reset()); // Active wait of end of reset send
Host_ack_reset();
//Workaround for some bugly devices with powerless pull up
//usually low speed where data line rise slowly and can be interpretaded as disconnection
for(c=0;c!=0xFFFF;c++) // Basic Timeout counter
{
if(Is_usb_event(EVT_HOST_SOF)) //If we detect SOF, device is still alive and connected, just clear false disconnect flag
{
if(Is_device_disconnection())
{
Host_ack_device_connection();
Host_ack_device_disconnection();
break;
}
}
}
Host_enable_device_disconnection_interrupt();
c = 0;
host_configure_pipe(PIPE_CONTROL, \
TYPE_CONTROL, \
TOKEN_SETUP, \
EP_CONTROL, \
SIZE_64, \
ONE_BANK, \
0 );
while(c<200) // wait 200ms after USB reset
{
if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; }
if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {break;}
}
usb_tree.device[0].ep_ctrl_size=data_stage[OFFSET_FIELD_MAXPACKETSIZE];
// Give an absolute device address
host_set_address(DEVICE_BASE_ADDRESS);
usb_tree.device[0].device_address=DEVICE_BASE_ADDRESS;
device_state = DEVICE_ADDRESSED;
}
else
{ device_state = DEVICE_ERROR; }
break;
//------------------------------------------------------
// DEVICE_BASE_ADDRESSED state
//
// - Check if VID PID is in supported list
//
case DEVICE_ADDRESSED :
if (CONTROL_GOOD == host_get_device_descriptor())
{
// Detect if the device connected belongs to the supported devices table
if (HOST_TRUE == host_check_VID_PID())
{
Host_set_device_supported();
Host_device_supported_action();
device_state = DEVICE_CONFIGURED;
}
else
{
#if (HOST_STRICT_VID_PID_TABLE==ENABLE)
Host_device_not_supported_action();
device_state = DEVICE_ERROR;
#else
device_state = DEVICE_CONFIGURED;
#endif
}
}
else // Can not get device descriptor
{ device_state = DEVICE_ERROR; }
break;
//------------------------------------------------------
// DEVICE_CONFIGURED state
//
// - Configure pipes for the supported interface
// - Send Set_configuration() request
// - Goto full operating mode (device ready)
//
case DEVICE_CONFIGURED :
if (CONTROL_GOOD == host_get_configuration_descriptor())
{
if (HOST_FALSE != host_check_class()) // Class support OK?
{
usb_tree.nb_device++;
#if (HOST_AUTO_CFG_ENDPOINT==ENABLE)
if(host_auto_configure_endpoint())
#else
Host_set_configured(); // Assumes config is OK with user config
if(User_configure_endpoint()) // User call here instead of autoconfig
#endif
{
if (CONTROL_GOOD== host_set_configuration(1)) // Send Set_configuration
{
//host_set_interface(interface_bound,interface_bound_alt_set);
// device and host are now fully configured
// goto DEVICE READY normal operation
device_state = DEVICE_READY;
Host_set_device_ready();
// monitor device disconnection under interrupt
Host_enable_device_disconnection_interrupt();
// If user host application requires SOF interrupt event
// Keep SOF interrupt enable otherwize, disable this interrupt
#if (HOST_CONTINUOUS_SOF_INTERRUPT==DISABLE && USB_HUB_SUPPORT==DISABLE)
Host_disable_sof_interrupt();
#endif
#if (USB_HUB_SUPPORT==ENABLE)
// Check if the connected device is a hub
if(Get_class(0)==HUB_CLASS && Get_subclass(0)==0x00 && Get_protocol(0)==0x00)
{
// Get hub descriptor
if( Get_hub_descriptor()==CONTROL_GOOD)
{
// Power each port of the hub
i=data_stage[NB_PORT_OFFSET];
for(c=1;c<=i;c++)
{
Set_port_feature(PORT_POWER,c);
}
nb_hub_present = 1;
hub_device_address[0]=DEVICE_BASE_ADDRESS;
hub_init(nb_hub_present-1);
}
}
else
{
nb_hub_present = 0;
new_device_connected=TRUE;
}
#else
new_device_connected=TRUE;
#endif
Enable_interrupt();
LOG_STR_CODE(log_device_enumerated);
}
else// Problem during Set_configuration request...
{ device_state = DEVICE_ERROR; }
}
}
else // device class not supported...
{
device_state = DEVICE_ERROR;
LOG_STR_CODE(log_device_unsupported);
Host_device_class_not_supported_action();
}
}
else // Can not get configuration descriptors...
{ device_state = DEVICE_ERROR; }
break;
//------------------------------------------------------
// DEVICE_READY state
//
// - Full std operatinf mode
// - Nothing to do...
//
case DEVICE_READY: // Host full std operating mode!
new_device_connected=FALSE;
#if (USB_HUB_SUPPORT==ENABLE)
f_hub_port_disconnect=FALSE;
// If one hub is present in the USB tree and the period interval
// for the interrupt hub endpoint occurs
if(nb_hub_present && hub_interrupt_sof==0)
{
saved_device=selected_device; // Backup user selected device
for(j=1;j<=nb_hub_present;j++)
{
for(i=0;i<MAX_DEVICE_IN_USB_TREE;i++)
{
if(usb_tree.device[i].device_address==hub_device_address[j-1]) break;
}
Host_select_device(i);
Host_select_pipe(usb_tree.device[i].interface[0].ep[0].pipe_number);
Host_ack_nak_received();
Host_ack_in_received();
Host_unfreeze_pipe();
Host_send_in();
while(1)
{
if(Is_host_nak_received()) break;
if(Is_host_emergency_exit()) break;
if(Is_host_in_received()) break;
}
Host_freeze_pipe();
if(Is_host_nak_received())
{
Host_ack_nak_received();
}
if(Is_host_in_received())
{
if(Is_host_stall()==FALSE)
{
c=Host_read_byte();
}
Host_ack_in_received();
hub_manage_port_change_status(c,j);
}
} // for all hub
Host_select_device(saved_device); // Restore user selected device
#if (USER_PERIODIC_PIPE==ENABLE)
unfreeze_user_periodic_pipe();
#endif
}
#endif
break;
//------------------------------------------------------
// DEVICE_ERROR state
//
// - Error state
// - Do custom action call (probably go to default mode...)
//
case DEVICE_ERROR : // TODO !!!!
#if (HOST_ERROR_RESTART==ENABLE)
device_state=DEVICE_UNATTACHED;
#endif
Host_device_error_action();
break;
//------------------------------------------------------
// DEVICE_SUSPENDED state
//
// - Host application request to suspend the device activity
// - State machine comes here thanks to Host_request_suspend()
//
case DEVICE_SUSPENDED :
if(Is_device_supports_remote_wakeup()) // If the connected device supports remote wake up
{
host_set_feature_remote_wakeup(); // Enable this feature...
}
LOG_STR_CODE(log_going_to_suspend);
c = Is_host_sof_interrupt_enabled(); //Save current sof interrupt enable state
Host_disable_sof_interrupt();
Host_ack_sof();
Host_disable_sof(); // Stop start of frame generation, this generates the suspend state
Host_ack_hwup();
Host_enable_hwup_interrupt(); // Enable host wake-up interrupt
// (this is the unique USB interrupt able to wake up the CPU core from power-down mode)
Usb_freeze_clock();
Stop_pll();
Host_suspend_action(); // Custom action here! (for example go to power-save mode...)
device_state=DEVICE_WAIT_RESUME; // wait for device resume event
break;
//------------------------------------------------------
// DEVICE_WAIT_RESUME state
//
// - Wait in this state till the host receives an upstream resume from the device
// - or the host software request the device to resume
//
case DEVICE_WAIT_RESUME :
if(Is_usb_event(EVT_HOST_HWUP)|| Is_host_request_resume())// Remote wake up has been detected
// or Local resume request has been received
{
if(Is_host_request_resume()) // Not a remote wakeup, but an host application request
{
Host_disable_hwup_interrupt(); // Wake up interrupt should be disable host is now wake up !
// CAUTION HWUP can be cleared only when USB clock is active
Pll_start_auto(); // First Restart the PLL for USB operation
Wait_pll_ready(); // Get sure pll is lock
Usb_unfreeze_clock(); // Enable clock on USB interface
Host_ack_hwup(); // Clear HWUP interrupt flag
}
Host_enable_sof();
Host_send_resume(); // Send down stream resume
while (Is_host_down_stream_resume()==FALSE); // Wait Down stream resume sent
Host_ack_remote_wakeup(); // Ack remote wake-up reception
Host_ack_request_resume(); // Ack software request
Host_ack_down_stream_resume(); // Ack down stream resume sent
Usb_ack_event(EVT_HOST_HWUP); // Ack software event
if(c) { Host_enable_sof_interrupt(); } // Restore SOF interrupt enable state before suspend
device_state=DEVICE_READY; // Come back to full operating mode
LOG_STR_CODE(log_usb_resumed);
}
break;
//------------------------------------------------------
// DEVICE_DISCONNECTED state
//
// - Device disconnection has been detected
// - Run scheduler in this state at least two times to get sure event is detected by all host application tasks
// - Go to DEVICE_DISCONNECTED_ACK state before DEVICE_UNATTACHED, to get sure scheduler calls all app tasks...
//
case DEVICE_DISCONNECTED :
device_state = DEVICE_DISCONNECTED_ACK;
break;
//------------------------------------------------------
// DEVICE_DISCONNECTED_ACK state
//
// - Device disconnection has been detected and managed bu applicatives tasks
// - Go to DEVICE_UNATTACHED state
//
case DEVICE_DISCONNECTED_ACK :
device_state = DEVICE_UNATTACHED;
break;
//------------------------------------------------------
// default state
//
// - Default case: ERROR
// - Goto no device state
//
default :
device_state = DEVICE_UNATTACHED;
break;
}
}
__interrupt void usb_pipe_interrupt()
#endif
{
U8 pipe_nb;
U8 *ptr_buf;
void (*fct_handle)(U8 status,U16 nb_byte);
U16 n;
U8 i;
U8 do_call_back=FALSE;
pipe_nb_save = Host_get_selected_pipe(); // Important! Save here working pipe number
pipe_nb=usb_get_nb_pipe_interrupt(); // work with the correct pipe number that generates the interrupt
Host_select_pipe(pipe_nb); // Select this pipe
fct_handle=*(it_pipe_str[pipe_nb].handle);
// Now try to detect what event generate an interrupt...
if (Is_host_pipe_error()) // Any error ?
{
it_pipe_str[pipe_nb].status = Host_error_status();
it_pipe_str[pipe_nb].enable=DISABLE;
Host_stop_pipe_interrupt(pipe_nb);
Host_ack_all_errors();
do_call_back=TRUE;
goto usb_pipe_interrupt_end;
}
if (Is_host_stall()) // Stall handshake received ?
{
it_pipe_str[pipe_nb].status=PIPE_STALL;
it_pipe_str[pipe_nb].enable=DISABLE;
Host_stop_pipe_interrupt(pipe_nb);
do_call_back=TRUE;
goto usb_pipe_interrupt_end;
}
#if (NAK_TIMEOUT_ENABLE==ENABLE)
if (Is_host_nak_received()) // NAK ?
{
Host_ack_nak_received();
// check if number of NAK timeout error occurs (not for interrupt type pipe)
if((--it_pipe_str[pipe_nb].nak_timeout==0) && (Host_get_pipe_type()!=TYPE_INTERRUPT))
{
it_pipe_str[pipe_nb].status=PIPE_NAK_TIMEOUT;
it_pipe_str[pipe_nb].enable=DISABLE;
Host_stop_pipe_interrupt(pipe_nb);
do_call_back=TRUE;
goto usb_pipe_interrupt_end;
}
}
#endif
if (Is_host_in_received()) // Pipe IN reception ?
{
ptr_buf=it_pipe_str[pipe_nb].ptr_buf+it_pipe_str[pipe_nb].nb_byte_processed; // Build pointer to data buffer
n=it_pipe_str[pipe_nb].nb_byte_to_process-it_pipe_str[pipe_nb].nb_byte_processed; // Remaining data bytes
Host_freeze_pipe();
if (Host_byte_counter()<=n)
{
if ((Host_byte_counter() < n)&&(Host_byte_counter()<Host_get_pipe_length())) //Received less than remaining, but less than pipe capacity
//TODO: error code
{
n=0;
}
else
{
n-=Host_byte_counter();
}
it_pipe_str[pipe_nb].nb_byte_processed+=Host_byte_counter(); // Update nb of byte received
for (i=Host_byte_counter();i;i--)
{ *ptr_buf=Host_read_byte(); ptr_buf++;}
}
else // more bytes received than expected
{ // TODO error code management
it_pipe_str[pipe_nb].nb_byte_processed+=n;
for (i=n;i;i--) // Byte number limited to the initial request (limit tab over pb)
{ *ptr_buf=Host_read_byte(); ptr_buf++;}
n=0;
}
Host_ack_in_received();
if(n>0) //still something to process
{
Host_unfreeze_pipe(); // Request another IN transfer
Host_send_in();
private_sof_counter=0; // Reset the counter in SOF detection sub-routine
it_pipe_str[pipe_nb].timeout=0; // Reset timeout
it_pipe_str[pipe_nb].nak_timeout=NAK_RECEIVE_TIMEOUT;
}
else //end of transfer
{
it_pipe_str[pipe_nb].enable=DISABLE;
it_pipe_str[pipe_nb].status=PIPE_GOOD;
Host_stop_pipe_interrupt(pipe_nb);
do_call_back=TRUE;
}
}
if(Is_host_out_sent()) // Pipe OUT sent ?
{
Host_ack_out_sent();
it_pipe_str[pipe_nb].nb_byte_processed+=it_pipe_str[pipe_nb].nb_byte_on_going;
it_pipe_str[pipe_nb].nb_byte_on_going=0;
ptr_buf=it_pipe_str[pipe_nb].ptr_buf+it_pipe_str[pipe_nb].nb_byte_processed; // Build pointer to data buffer
n=it_pipe_str[pipe_nb].nb_byte_to_process-it_pipe_str[pipe_nb].nb_byte_processed; // Remaining data bytes
if(n>0) // Still data to process...
{
Host_unfreeze_pipe();
// Prepare data to be sent
i = Host_get_pipe_length();
if ( i > n) // Pipe size> remaining data
{
i = n;
n = 0;
}
else // Pipe size < remaining data
{ n -= i; }
it_pipe_str[pipe_nb].nb_byte_on_going+=i; // Update nb data processed
while (i!=0) // Load Pipe buffer
{
Host_write_byte(*ptr_buf++); i--;
}
private_sof_counter=0; // Reset the counter in SOF detection sub-routine
it_pipe_str[pipe_nb].timeout=0; // Refresh timeout counter
it_pipe_str[pipe_nb].nak_timeout=NAK_SEND_TIMEOUT;
Host_send_out(); // Send the USB frame
}
else //n==0 Transfer is finished
{
it_pipe_str[pipe_nb].enable=DISABLE; // Tranfer end
it_pipe_str[pipe_nb].status=PIPE_GOOD; // Status OK
Host_stop_pipe_interrupt(pipe_nb);
do_call_back=TRUE;
}
}
usb_pipe_interrupt_end:
Host_select_pipe(pipe_nb_save); // Restore pipe number !!!!
if (is_any_interrupt_pipe_active()==FALSE) // If no more transfer is armed
{
if (g_sav_int_sof_enable==FALSE)
{
Host_disable_sof_interrupt();
}
}
if(do_call_back) // Any callback functions to perform ?
{
fct_handle(it_pipe_str[pipe_nb].status,it_pipe_str[pipe_nb].nb_byte_processed);
}
}
