FreeCalypso > hg > fc-tourmaline
view src/nucleus/sms.c @ 51:04aaa5622fa7
disable deep sleep when Iota LEDB is on
TI's Iota chip docs say that CLK13M must be running in order for
LEDB to work, and practical experience on Mot C139 which uses
Iota LEDB for its keypad backlight concurs: if Calypso enters
deep sleep while the keypad backlight is turned on, the light
flickers visibly as the chipset goes into and out of deep sleep.
TI's original L1 sleep manager code had logic to disable deep sleep
when LT_Status() returns nonzero, but that function only works
for B-Sample and C-Sample LT, always returns 0 on BOARD 41 - no
check of Iota LEDB status anywhere. Change this code for our
current hardware: disable deep sleep when Iota LEDB has been
turned on through LLS.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Mon, 19 Oct 2020 05:11:29 +0000 |
parents | 4e78acac3d88 |
children |
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/*************************************************************************/ /* */ /* Copyright Mentor Graphics Corporation 2002 */ /* All Rights Reserved. */ /* */ /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ /* SUBJECT TO LICENSE TERMS. */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* FILE NAME VERSION */ /* */ /* sms.c Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* SM - Semaphore Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains the supplemental routines for the Semaphore */ /* Management component. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* SMS_Reset_Semaphore Reset semaphore */ /* terminate condition */ /* */ /* DEPENDENCIES */ /* */ /* cs_extr.h Common Service functions */ /* tc_extr.h Thread Control functions */ /* sm_extr.h Semaphore functions */ /* hi_extr.h History functions */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1994 Created initial version 1.1 from */ /* routines originally in core */ /* */ /* 03-18-1994 Verified version 1.1 */ /* 04-17-1996 updated to version 1.2 */ /* 03-24-1998 Released version 1.3. */ /* 03-26-1999 Released 1.11m (new release */ /* numbering scheme) */ /* 04-17-2002 Released version 1.13m */ /* 11-07-2002 Released version 1.14 */ /*************************************************************************/ #define NU_SOURCE_FILE #include "cs_extr.h" /* Common service functions */ #include "tc_extr.h" /* Thread control functions */ #include "sm_extr.h" /* Semaphore functions */ #include "hi_extr.h" /* History functions */ #include "profiler.h" /* ProView interface */ /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* SMS_Reset_Semaphore */ /* */ /* DESCRIPTION */ /* */ /* This function resets a semaphore back to the initial state. All */ /* tasks suspended on the semaphore are resumed with the reset */ /* completion status. */ /* */ /* CALLED BY */ /* */ /* Application */ /* SMSE_Reset_Semaphore Error checking shell */ /* */ /* CALLS */ /* */ /* [HIC_Make_History_Entry] Make entry in history log */ /* TCC_Resume_Task Resume a suspended task */ /* [TCT_Check_Stack] Stack checking function */ /* TCT_Control_To_System Transfer control to system */ /* TCT_System_Protect Protect semaphore */ /* TCT_Unprotect Release protection */ /* */ /* INPUTS */ /* */ /* semaphore_ptr Semaphore control block ptr */ /* initial_count Initial count to reset the */ /* semaphore to */ /* */ /* OUTPUTS */ /* */ /* NU_SUCCESS */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Changed function interface to */ /* match the prototype, added */ /* register variable logic, */ /* optimized protection logic, */ /* resulting in version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* */ /*************************************************************************/ STATUS SMS_Reset_Semaphore(NU_SEMAPHORE *semaphore_ptr, UNSIGNED initial_count) { R1 SM_SCB *semaphore; /* Semaphore control blk ptr */ R2 SM_SUSPEND *suspend_ptr; /* Suspend block pointer */ R3 SM_SUSPEND *next_ptr; /* Next suspend block pointer*/ STATUS preempt; /* Status for resume call */ NU_SUPERV_USER_VARIABLES /* Switch to supervisor mode */ NU_SUPERVISOR_MODE(); /* Move input semaphore pointer into internal pointer. */ semaphore = (SM_SCB *) semaphore_ptr; #ifdef NU_ENABLE_STACK_CHECK /* Call stack checking function to check for an overflow condition. */ TCT_Check_Stack(); #endif #ifdef NU_ENABLE_HISTORY /* Make an entry that corresponds to this function in the system history log. */ HIC_Make_History_Entry(NU_RESET_SEMAPHORE_ID, (UNSIGNED) semaphore, (UNSIGNED) initial_count, (UNSIGNED) 0); #endif /* Protect against access to the semaphore. */ TCT_System_Protect(); /* Pickup the suspended task pointer list. */ suspend_ptr = semaphore -> sm_suspension_list; /* Walk the chain task(s) currently suspended on the semaphore. */ preempt = 0; while (suspend_ptr) { /* Resume the suspended task. Insure that the status returned is NU_SEMAPHORE_RESET. */ suspend_ptr -> sm_return_status = NU_SEMAPHORE_RESET; /* Point to the next suspend structure in the link. */ next_ptr = (SM_SUSPEND *) (suspend_ptr -> sm_suspend_link.cs_next); /* Resume the specified task. */ preempt = preempt | TCC_Resume_Task((NU_TASK *) suspend_ptr -> sm_suspended_task, NU_SEMAPHORE_SUSPEND); /* Determine if the next is the same as the current pointer. */ if (next_ptr == semaphore -> sm_suspension_list) /* Clear the suspension pointer to signal the end of the list traversal. */ suspend_ptr = NU_NULL; else /* Move the next pointer into the suspend block pointer. */ suspend_ptr = next_ptr; } /* Initialize the semaphore. */ semaphore -> sm_semaphore_count = initial_count; semaphore -> sm_tasks_waiting = 0; semaphore -> sm_suspension_list = NU_NULL; #ifdef INCLUDE_PROVIEW _RTProf_DumpSema(RT_PROF_RESET_SEMAPHORE,(SM_SCB *) semaphore, RT_PROF_OK); #endif /* Determine if preemption needs to occur. */ if (preempt) /* Transfer control to system to facilitate preemption. */ TCT_Control_To_System(); /* Release protection against access to the semaphore. */ TCT_Unprotect(); /* Return to user mode */ NU_USER_MODE(); /* Return a successful completion. */ return(NU_SUCCESS); }