bbe4e500c3
- Disable IDLE hook (it would wake the device up as soon as possible). - Logger task sleep for 100ms (disable logging for better battery life) - Logging is disabled by default - Apply fix for ERRATA 87 (clear FPU interrupt before going to sleep). Ports files from FreeRTOS are now in the sources (they where in the SDK before)
149 lines
6.7 KiB
C
149 lines
6.7 KiB
C
/*
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* FreeRTOS Kernel V10.0.0
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* Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software. If you wish to use our Amazon
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* FreeRTOS name, please do so in a fair use way that does not cause confusion.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* http://www.FreeRTOS.org
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* http://aws.amazon.com/freertos
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*
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* 1 tab == 4 spaces!
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*/
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the ARM CM4F port.
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*----------------------------------------------------------*/
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/*
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* Start first task is a separate function so it can be tested in isolation.
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*/
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void vPortStartFirstTask( void ) __attribute__ (( naked ));
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/*
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* Exception handlers.
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*/
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void vPortSVCHandler( void ) __attribute__ (( naked ));
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void xPortPendSVHandler( void ) __attribute__ (( naked ));
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/*-----------------------------------------------------------*/
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void vPortStartFirstTask( void )
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{
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__asm volatile(
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#if defined(__SES_ARM)
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" ldr r0, =_vectors \n" /* Locate the stack using _vectors table. */
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#else
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" ldr r0, =__isr_vector \n" /* Locate the stack using __isr_vector table. */
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#endif
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" ldr r0, [r0] \n"
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" msr msp, r0 \n" /* Set the msp back to the start of the stack. */
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" cpsie i \n" /* Globally enable interrupts. */
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" cpsie f \n"
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" dsb \n"
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" isb \n"
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#ifdef SOFTDEVICE_PRESENT
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/* Block kernel interrupts only (PendSV) before calling SVC */
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" mov r0, %0 \n"
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" msr basepri, r0 \n"
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#endif
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" svc 0 \n" /* System call to start first task. */
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" \n"
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" .align 2 \n"
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#ifdef SOFTDEVICE_PRESENT
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::"i"(configKERNEL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS))
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#endif
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);
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}
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/*-----------------------------------------------------------*/
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void vPortSVCHandler( void )
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{
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__asm volatile (
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" ldr r3, =pxCurrentTCB \n" /* Restore the context. */
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" ldr r1, [r3] \n" /* Use pxCurrentTCBConst to get the pxCurrentTCB address. */
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" ldr r0, [r1] \n" /* The first item in pxCurrentTCB is the task top of stack. */
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" ldmia r0!, {r4-r11, r14} \n" /* Pop the registers that are not automatically saved on exception entry and the critical nesting count. */
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" msr psp, r0 \n" /* Restore the task stack pointer. */
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" isb \n"
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" mov r0, #0 \n"
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" msr basepri, r0 \n"
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" bx r14 \n"
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" \n"
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" .align 2 \n"
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);
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}
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/*-----------------------------------------------------------*/
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void xPortPendSVHandler( void )
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{
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/* This is a naked function. */
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__asm volatile
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(
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" mrs r0, psp \n"
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" isb \n"
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" \n"
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" ldr r3, =pxCurrentTCB \n" /* Get the location of the current TCB. */
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" ldr r2, [r3] \n"
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" \n"
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" tst r14, #0x10 \n" /* Is the task using the FPU context? If so, push high vfp registers. */
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" it eq \n"
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" vstmdbeq r0!, {s16-s31} \n"
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" \n"
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" stmdb r0!, {r4-r11, r14} \n" /* Save the core registers. */
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" \n"
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" str r0, [r2] \n" /* Save the new top of stack into the first member of the TCB. */
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" \n"
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" stmdb sp!, {r3} \n"
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" mov r0, %0 \n"
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" msr basepri, r0 \n"
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" dsb \n"
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" isb \n"
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" bl vTaskSwitchContext \n"
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" mov r0, #0 \n"
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" msr basepri, r0 \n"
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" ldmia sp!, {r3} \n"
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" \n"
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" ldr r1, [r3] \n" /* The first item in pxCurrentTCB is the task top of stack. */
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" ldr r0, [r1] \n"
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" \n"
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" ldmia r0!, {r4-r11, r14} \n" /* Pop the core registers. */
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" \n"
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" tst r14, #0x10 \n" /* Is the task using the FPU context? If so, pop the high vfp registers too. */
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" it eq \n"
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" vldmiaeq r0!, {s16-s31} \n"
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" \n"
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" msr psp, r0 \n"
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" isb \n"
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" \n"
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" \n"
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" bx r14 \n"
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" \n"
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" .align 2 \n"
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::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS))
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);
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}
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