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本帖最后由 mytomorrow 于 2019-9-17 17:11 编辑 8 t2 \' ^. i9 S, I
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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 2 \5 i. G! d* D$ }
- ; Vector Table Mapped to Address 0 at Reset
-
- 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
-
-
- AREA |.text|, CODE, READONLY
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" z% R' q: C T+ L# u9 f" K5 h, W& o不同芯片有各自的startup code，所以定义不同。
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0 n( g, C) F; [6 W- y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。* m4 |2 J9 v, p% u; N2 X, ^
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8 M* r" P& ?, s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。
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发表于 2019-9-17 17:02
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