mirror of
https://github.com/armink/FreeModbus_Slave-Master-RTT-STM32.git
synced 2025-02-25 09:56:56 +08:00
de7bad9245
2、【创建】Eclipse工程，并支持IAR插件调试 3、【创建】Keil工程，位于/RVMDK目录下 4、【创建】IAR工程，位于/EWARM目录下 5、【添加】RT-Thread1.1.1操作系统支持 6、【添加】LED1、LED2系统运行指示灯 7、【修改】Readdme.md文件 Signed-off-by: armink <armink.ztl@gmail.com>
100 lines
2.2 KiB
ArmAsm
100 lines
2.2 KiB
ArmAsm
/*
|
|
* File : context.S
|
|
* This file is part of RT-Thread RTOS
|
|
* COPYRIGHT (C) 2006, RT-Thread Development Team
|
|
*
|
|
* The license and distribution terms for this file may be
|
|
* found in the file LICENSE in this distribution or at
|
|
* http://openlab.rt-thread.com/license/LICENSE
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2008-12-11 XuXinming first version
|
|
*/
|
|
|
|
/*!
|
|
* \addtogroup LPC2478
|
|
*/
|
|
/*@{*/
|
|
|
|
#define NOINT 0xc0
|
|
|
|
/*
|
|
* rt_base_t rt_hw_interrupt_disable();
|
|
*/
|
|
.globl rt_hw_interrupt_disable
|
|
rt_hw_interrupt_disable:
|
|
mrs r0, cpsr
|
|
orr r1, r0, #NOINT
|
|
msr cpsr_c, r1
|
|
mov pc, lr
|
|
|
|
/*
|
|
* void rt_hw_interrupt_enable(rt_base_t level);
|
|
*/
|
|
.globl rt_hw_interrupt_enable
|
|
rt_hw_interrupt_enable:
|
|
msr cpsr, r0
|
|
mov pc, lr
|
|
|
|
/*
|
|
* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
|
|
* r0 --> from
|
|
* r1 --> to
|
|
*/
|
|
.globl rt_hw_context_switch
|
|
rt_hw_context_switch:
|
|
stmfd sp!, {lr} @ push pc (lr should be pushed in place of PC)
|
|
stmfd sp!, {r0-r12, lr} @ push lr & register file
|
|
|
|
mrs r4, cpsr
|
|
stmfd sp!, {r4} @ push cpsr
|
|
mrs r4, spsr
|
|
stmfd sp!, {r4} @ push spsr
|
|
|
|
str sp, [r0] @ store sp in preempted tasks TCB
|
|
ldr sp, [r1] @ get new task stack pointer
|
|
|
|
ldmfd sp!, {r4} @ pop new task spsr
|
|
msr spsr_cxsf, r4
|
|
ldmfd sp!, {r4} @ pop new task cpsr
|
|
msr cpsr_cxsf, r4
|
|
|
|
ldmfd sp!, {r0-r12, lr, pc} @ pop new task r0-r12, lr & pc
|
|
|
|
/*
|
|
* void rt_hw_context_switch_to(rt_uint32 to);
|
|
* r0 --> to
|
|
*/
|
|
.globl rt_hw_context_switch_to
|
|
rt_hw_context_switch_to:
|
|
ldr sp, [r0] @ get new task stack pointer
|
|
|
|
ldmfd sp!, {r4} @ pop new task spsr
|
|
msr spsr_cxsf, r4
|
|
ldmfd sp!, {r4} @ pop new task cpsr
|
|
msr cpsr_cxsf, r4
|
|
|
|
ldmfd sp!, {r0-r12, lr, pc} @ pop new task r0-r12, lr & pc
|
|
|
|
/*
|
|
* void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to);
|
|
*/
|
|
.globl rt_thread_switch_interrupt_flag
|
|
.globl rt_interrupt_from_thread
|
|
.globl rt_interrupt_to_thread
|
|
.globl rt_hw_context_switch_interrupt
|
|
rt_hw_context_switch_interrupt:
|
|
ldr r2, =rt_thread_switch_interrupt_flag
|
|
ldr r3, [r2]
|
|
cmp r3, #1
|
|
beq _reswitch
|
|
mov r3, #1 @ set rt_thread_switch_interrupt_flag to 1
|
|
str r3, [r2]
|
|
ldr r2, =rt_interrupt_from_thread @ set rt_interrupt_from_thread
|
|
str r0, [r2]
|
|
_reswitch:
|
|
ldr r2, =rt_interrupt_to_thread @ set rt_interrupt_to_thread
|
|
str r1, [r2]
|
|
mov pc, lr
|