ARM Cortex-M3
瀛︿範绗旇
(3)
鏈�杩戝湪瀛?/p>
ARM
Cortex-M3
锛屾壘浜嗘湰鍙风О寰堢粡鍏哥殑涔?/p>
An
Definitive
Guide
to
The
ARM
Cortex-M3
鍦ㄧ湅銆傝繖涓郴鍒楀涔犵瑪璁板叾瀹炲氨鏄湪瀛︿範杩欐湰涔︾殑杩囩▼涓?/p>
鍋氱殑璇讳功绗旇銆傜涓夌珷
Cortex-M3
鍩虹杩欑珷鐨勫唴瀹规湁涓嶅皯鏄拰绗簩绔犻噸澶嶇殑銆?/p>
閲嶅鐨勯儴鍒嗚繖閲屽氨涓嶅啀鎻愪簡銆傚爢鏍?/p>
Cortex-M3
鐨勫爢鏍堟槸鍊掔敓鐨勶紝瀹炴爤椤躲�備篃灏?/p>
鏄?/p>
R13
鎸囧悜鏈�鍚庝竴娆″帇鍏ュ爢鏍堢殑鍐呭銆備笅闈㈡槸涓畝鍗曠殑渚嬪瓙锛?/p>
PUSH {R0} ; *(--
R13)=R0
銆?/p>
R13
鏄?/p>
long*
鐨勬寚閽?/p>
POP
{R0}
;
R0= *R13++PUSH
鍜?/p>
POP
鍙互涓�
娆℃搷浣滃涓瘎瀛樺櫒锛?/p>
subroutine_1PUSH {R0-R7, R12, R14} ;
淇濆瓨瀵勫瓨鍣ㄥ垪琛?/p>
;
鎵ц澶勭悊
POP {R0-R7, R12, R14} ;
鎭㈠瀵勫瓨鍣ㄥ垪琛?/p>
BX R14 ;
杩斿洖鍒颁富璋冨嚱鏁?/p>
涓婇潰鐨勪緥瀛愪腑椤哄甫涔熺敤鍒颁簡
R14
銆傚洜姝ゅ氨涓嶅崟鐙瑙?/p>
R14
浜嗐�傜壒娈婂姛鑳藉瘎瀛樺櫒
缁勮闂壒娈婂姛鑳藉瘎瀛樺櫒闇�瑕佺敤涓撶敤鎸囦护锛?/p>
MRS
,
;
璇荤壒娈婂姛鑳藉瘎瀛樺櫒鐨勫�煎埌閫?/p>
鐢ㄥ瘎瀛樺櫒
MSR ,
;
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閮ㄥ張琚垎涓轰笁涓瓙鐘舵�佸瘎瀛樺櫒锛?/p>
搴旂敤绋嬪簭
PSR
锛?/p>
APSR
锛?/p>
涓柇鍙?/p>
PSR
锛?/p>
IPSR
锛?/p>
鎵ц
PSR
锛?/p>
EPSR
锛夊弬鐪嬩笅鍥撅細
鍥?/p>
6 Cortex-M3
涓殑绋嬪簭鐘舵�佸瘎瀛樺櫒锛?/p>
xPSR
锛?/p>
PRIMASK
锛?/p>
FAULTMASK
鍜?/p>
BASEPRI
鎺у埗涓柇鍜屽紓甯哥殑寮�鍚拰灞忚斀
PRIMASK
=
1
鍚庡彧鏈?/p>
NMI
鍜岀‖
fault
鍙互鍝嶅簲锛岄粯璁や负
0FAULTMASK
=
1
鍚庡彧鏈?/p>
NMI
鍜岀‖
fault
鍙互鍝嶅簲锛岄粯璁?/p>
涓?/p>
0BASEPRI
锛氫紭鍏堢骇鍙峰ぇ浜庣瓑浜庢鍊肩殑涓柇閮借灞忚斀鍙湁鍦ㄧ壒鏉冪骇涓嬶紝鎵嶅厑
璁歌闂繖
3
涓瘎瀛樺櫒銆傛帶鍒跺瘎瀛樺櫒锛?/p>
CONTROL
锛?/p>
CONTROL[0]=1
锛岀敤鎴风骇鐨?/p>
绾跨▼妯″紡
CONTROL[0]=0
锛岀壒鏉冪骇鐨勭嚎绋嬫ā寮?/p>
CONTROL[1]=1
锛岄�夋嫨浣跨敤
MSPCONTROL[1]=0
锛岄�夋嫨浣跨敤
PSP
涓柇鍚戦噺琛ㄩ粯璁ょ殑涓柇鍚戦噺琛ㄥ湪鍦板潃
0
澶勶紝鍒╃敤
NVIC
鐨勯噸瀹氫綅瀵勫瓨鍣ㄥ彲浠?/p>
灏嗗叾閲嶅畾浣嶃�傚彟澶栵紝涓柇鍚戦噺琛ㄧ殑绗竴涓悜閲忕殑浣嶇疆瀛樻斁鐨勬槸
MSP
鐨勫垵濮嬪�笺�?