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标题: 如何定义ARM中断函数 [打印本页]
作者: mytomorrow 时间: 2019-9-17 17:02
标题: 如何定义ARM中断函数
本帖最后由 mytomorrow 于 2019-9-17 17:11 编辑
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4 V* H* q" N- s3 _# i3 p( q' T自己暂时总结的，不一定对，先记录下来：
ARM的中断函数是在startup code中定义的，在CODE区分配中断向量表时，及将中断函数定义出了
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- ; Vector Table Mapped to Address 0 at Reset
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- AREA RESET, DATA, READONLY
- EXPORT __Vectors
-
- __Vectors DCD __initial_sp ; Top of Stack
- DCD Reset_Handler ; Reset Handler
- DCD NMI_Handler ; NMI Handler
- DCD HardFault_Handler ; Hard Fault Handler
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD SVC_Handler ; SVCall Handler
- DCD 0 ; Reserved
- DCD 0 ; Reserved
- DCD PendSV_Handler ; PendSV Handler
- DCD SysTick_Handler ; SysTick Handler
-
- ; External Interrupts
- DCD GPIO0_IRQHandler ; GPIO P0 Interrupt
- DCD GPIO1_IRQHandler ; GPIO P1 Interrupt
- DCD GPIO2_IRQHandler ; GPIO P2 Interrupt
- DCD GPIO3_IRQHandler ; GPIO P3 Interrupt
- DCD GPIO4_IRQHandler ; GPIO P4 Interrupt
- DCD CP_IRQHandler ; Capture/PWM
- DCD ADC_IRQHandler ; A/D Converter
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
- DCD UART0_IRQHandler ; UART0
- DCD UART1_IRQHandler ; UART1
- DCD UART2_IRQHandler ; UART2
- DCD UART3_IRQHandler ; UART3
- DCD TIMER0_IRQHandler ; Timer0
- DCD TIMER1_IRQHandler ; Timer1
- DCD TIMER2_IRQHandler ; Timer2
- DCD TIMER3_IRQHandler ; Timer3
- DCD WDT_IRQHandler ; Watchdog timer
- DCD I2C0_IRQHandler ; I2C0
- DCD I2C1_IRQHandler ; I2C1
- DCD SSP0_IRQHandler ; SSP0
- DCD SSP1_IRQHandler ; SSP1
- DCD TIMER01_IRQHandler ; Timer0 & Timer1
- DCD TIMER23_IRQHandler ; Timer2 & Timer3
- DCD Reserved_IRQHandler ; Reserved
- DCD Reserved_IRQHandler ; Reserved
-
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- AREA |.text|, CODE, READONLY( Z$ K; a' ]/ {+ F9 F4 y
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不同芯片有各自的startup code，所以定义不同。
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在startup code中定义的中断函数都是[weak]属性，如果编译器在别的文件中发现相同的函数名，则在链接时用别处的地址进行链接。* R3 k! H& ^" O* x% \- F0 B
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所以只要在工程的具体位置，按startup code中定义的名称直接完整该函数即可，不用在特别声明和与中断向量号联系起来。+ I9 Z; o6 l1 f5 l6 U* Q
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作者: wu68aq 时间: 2019-9-17 20:54
学习一下，谢谢分享。
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