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| 關於demo-int-c-ext的nmi_handler及warm_handler http://forum.andestech.com/viewtopic.php?f=23&t=197 |
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| Author: | cindy [ Fri Nov 11, 2011 6:54 pm ] |
| Post subject: | 關於demo-int-c-ext的nmi_handler及warm_handler |
demo-int-c-ext中的下面這個function，nmi_handler及warm_handler的流程會不會執行reset_handler的內容？ void __attribute__ ((reset("vectors=7;nmi_func=nmi_handler;warm_func=nmi_handler"))) reset_handler(void) { __cpu_init(); __c_init(); __soc_init(); main(); } 在Programming guide的Page 56介紹了int nmi_func(int *reg_ptr)的函式定義， 它寫 Return Value: 0 means OK to resume the work before NMI happens. -1 means fail and the prologue of reset handler will reset the system. It is also OK to hold the control and never return to the reset handler. 也就是user能自訂是否它要執行reset_handler是否要執行reset_handler的內容。 回0則不需要。回-1則會執行reset_handler。 |
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