#include "config.h"
#include "conf_usb.h"
#include "usb_task.h"
#include "lib_mcu/usb/usb_drv.h"
#include "usb_descriptors.h"
#include "lib_mcu/power/power_drv.h"
#include "lib_mcu/wdt/wdt_drv.h"
#include "lib_mcu/pll/pll_drv.h"
#include "modules/usb/device_chap9/usb_device_task.h"
Go to the source code of this file.
Functions | |
void | usb_task_init (void) |
void | usb_task (void) |
__interrupt void | usb_general_interrupt () |
Variables | |
volatile U16 | g_usb_event = 0 |
Public : U16 g_usb_event usb_connected is used to store USB events detected upon USB general interrupt subroutine Its value is managed by the following macros (See usb_task.h file) Usb_send_event(x) Usb_ack_event(x) Usb_clear_all_event() Is_usb_event(x) Is_not_usb_event(x). | |
bit | usb_connected |
Public : (bit) usb_connected usb_connected is set to TRUE when VBUS has been detected usb_connected is set to FALSE otherwise Used with USB_DEVICE_FEATURE == ENABLED only /. | |
U8 | usb_configuration_nb |
Public : (U8) usb_configuration_nb Store the number of the USB configuration used by the USB device when its value is different from zero, it means the device mode is enumerated Used with USB_DEVICE_FEATURE == ENABLED only /. | |
U8 | remote_wakeup_feature |
Public : (U8) remote_wakeup_feature Store a host request for remote wake up (set feature received) /. |
This module also contains the general USB interrupt subroutine. This subroutine is used to detect asynchronous USB events. Note:
Definition in file usb_task.c.
__interrupt void usb_general_interrupt | ( | ) |
USB interrupt subroutine This function is called each time a USB interrupt occurs. The following USB DEVICE events are taken in charge:
For each event, the user can launch an action by completing the associate define (See conf_usb.h file to add action upon events)
Note: Only interrupts events that are enabled are processed
none |
Definition at line 170 of file usb_task.c.
References EVT_USB_RESET, EVT_USB_RESUME, EVT_USB_SUSPEND, EVT_USB_WAKE_UP, FALSE, Is_pll_ready, Is_reset_interrupt_enabled, Is_resume_interrupt_enabled, Is_sof_interrupt_enabled, Is_suspend_interrupt_enabled, Is_usb_reset, Is_usb_resume, Is_usb_sof, Is_usb_suspend, Is_usb_wake_up, Is_wake_up_interrupt_enabled, Stop_pll, TRUE, Usb_ack_reset, Usb_ack_resume, Usb_ack_sof, Usb_ack_suspend, Usb_ack_wake_up, Usb_disable_resume_interrupt, Usb_disable_wake_up_interrupt, Usb_enable_reset_interrupt, Usb_enable_resume_interrupt, Usb_enable_suspend_interrupt, Usb_enable_wake_up_interrupt, Usb_freeze_clock, usb_init_device(), Usb_reset_action, Usb_resume_action, Usb_send_event, Usb_sof_action, Usb_suspend_action, usb_suspended, Usb_unfreeze_clock, Usb_wake_up_action, and Wait_pll_ready.
00172 { 00173 // - Device start of frame received 00174 if (Is_usb_sof() && Is_sof_interrupt_enabled()) 00175 { 00176 Usb_ack_sof(); 00177 Usb_sof_action(); 00178 } 00179 // - Device Suspend event (no more USB activity detected) 00180 if (Is_usb_suspend() && Is_suspend_interrupt_enabled()) 00181 { 00182 usb_suspended=TRUE; 00183 Usb_ack_wake_up(); // clear wake up to detect next event 00184 Usb_send_event(EVT_USB_SUSPEND); 00185 Usb_ack_suspend(); 00186 Usb_enable_wake_up_interrupt(); 00187 Usb_disable_resume_interrupt(); 00188 Usb_freeze_clock(); 00189 Stop_pll(); 00190 Usb_suspend_action(); 00191 } 00192 // - Wake up event (USB activity detected): Used to resume 00193 if (Is_usb_wake_up() && Is_wake_up_interrupt_enabled()) 00194 { 00195 if(Is_pll_ready()==FALSE) 00196 { 00197 #ifdef USE_USB_AUTOBAUD 00198 usb_autobaud(); 00199 #else 00200 Pll_start_auto(); 00201 #endif 00202 Wait_pll_ready(); 00203 } 00204 Usb_unfreeze_clock(); 00205 Usb_ack_wake_up(); 00206 if(usb_suspended) 00207 { 00208 #ifdef WA_USB_SUSPEND_PERTUBATION 00209 Usb_enable_resume_interrupt(); 00210 Usb_enable_reset_interrupt(); 00211 while(Is_usb_wake_up()) 00212 { 00213 Usb_ack_wake_up(); 00214 } 00215 usb_delay_ms(2); 00216 if(Is_usb_sof() || Is_usb_resume() || Is_usb_reset() ) 00217 { 00218 Usb_disable_wake_up_interrupt(); 00219 Usb_wake_up_action(); 00220 Usb_send_event(EVT_USB_WAKE_UP); 00221 Usb_enable_suspend_interrupt(); 00222 Usb_enable_resume_interrupt(); 00223 Usb_enable_reset_interrupt(); 00224 00225 } 00226 else // Workarround to make the USB enter power down mode again (spurious transcient detected on the USB lines) 00227 { 00228 Usb_ack_wake_up(); // clear wake up to detect next event 00229 Usb_send_event(EVT_USB_SUSPEND); 00230 Usb_ack_suspend(); 00231 Usb_enable_wake_up_interrupt(); 00232 Usb_disable_resume_interrupt(); 00233 Usb_freeze_clock(); 00234 Stop_pll(); 00235 Usb_suspend_action(); 00236 } 00237 #else 00238 Usb_enable_resume_interrupt(); 00239 Usb_enable_reset_interrupt(); 00240 Usb_ack_wake_up(); 00241 Usb_disable_wake_up_interrupt(); 00242 Usb_wake_up_action(); 00243 Usb_send_event(EVT_USB_WAKE_UP); 00244 Usb_enable_suspend_interrupt(); 00245 Usb_enable_resume_interrupt(); 00246 Usb_enable_reset_interrupt(); 00247 #endif 00248 } 00249 } 00250 // - Resume state bus detection 00251 if (Is_usb_resume() && Is_resume_interrupt_enabled()) 00252 { 00253 usb_suspended = FALSE; 00254 Usb_disable_wake_up_interrupt(); 00255 Usb_ack_resume(); 00256 Usb_disable_resume_interrupt(); 00257 Usb_resume_action(); 00258 Usb_send_event(EVT_USB_RESUME); 00259 } 00260 // - USB bus reset detection 00261 if (Is_usb_reset()&& Is_reset_interrupt_enabled()) 00262 { 00263 Usb_ack_reset(); 00264 usb_init_device(); 00265 Usb_reset_action(); 00266 Usb_send_event(EVT_USB_RESET); 00267 } 00268 00269 }