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鎮ㄥソ锛屾杩庝締鍒扮董搴�(k霉)闆诲瓙甯傚牬(ch菐ng)缍�(w菐ng) 鐧婚寗 | 鍏嶈不(f猫i)娉ㄥ唺(c猫)

spi鎺ュ彛
闁辫畝锛�4443鏅�(sh铆)闁擄細2017-06-03 14:49:31

銆�銆�SPI(Serial Peripheral Interface--涓茶澶栬ō(sh猫)鎺ュ彛)绺界窔绯荤当(t菕ng)鏄竴绋悓姝ヤ覆琛屽瑷�(sh猫)鎺ュ彛锛屽畠鍙互浣縈CU鑸囧悇绋鍦嶈ō(sh猫)鍌欎互涓茶鏂瑰紡閫�(j矛n)琛岄�氫俊浠ヤ氦鎻涗俊鎭�係PI鏈変笁鍊�(g猫)瀵勫瓨鍣ㄥ垎鍒ョ偤锛氭帶鍒跺瘎瀛樺櫒SPCR锛岀媭鎱�(t脿i)瀵勫瓨鍣⊿PSR锛屾暩(sh霉)鎿�(j霉)瀵勫瓨鍣⊿PDR銆傚鍦嶈ō(sh猫)鍌欏寘鎷現LASHRAM銆佺恫(w菐ng)绲�(lu貌)鎺у埗鍣�銆丩CD椤ず椹�(q奴)鍕�(d貌ng)鍣ㄣ�丄/D杞�(zhu菐n)鎻涘櫒鍜孧CU绛�銆係PI绺界窔绯荤当(t菕ng)鍙洿鎺ヨ垏鍚勫��(g猫)寤犲鐢熺敘(ch菐n)鐨勫绋(bi膩o)婧�(zh菙n)澶栧湇鍣ㄤ欢鐩存帴鎺ュ彛锛岃┎鎺ュ彛涓�鑸娇鐢�4姊濈窔锛氫覆琛屾檪(sh铆)閻樼窔锛圫CLK锛�銆佷富姗�(j墨)杓稿叆/寰炴(j墨)杓稿嚭鏁�(sh霉)鎿�(j霉)绶歁ISO銆佷富姗�(j墨)杓稿嚭/寰炴(j墨)杓稿叆鏁�(sh霉)鎿�(j霉)绶歁OSI鍜屼綆闆诲钩鏈夋晥鐨勫緸姗�(j墨)閬告搰绶歂SS(鏈夌殑SPI鎺ュ彛鑺墖甯舵湁涓柗淇¤櫉(h脿o)绶欼NT銆佹湁鐨凷PI鎺ュ彛鑺墖娌掓湁涓绘(j墨)杓稿嚭/寰炴(j墨)杓稿叆鏁�(sh霉)鎿�(j霉)绶歁OSI)銆�

鎳�(y墨ng)鐢�

銆�銆�SPI鎺ュ彛鐨勫叏绋辨槸"Serial Peripheral Interface"锛屾剰鐐轰覆琛屽鍦嶆帴鍙�,鏄疢otorola棣栧厛鍦ㄥ叾MC68HCXX绯诲垪铏曠悊鍣ㄤ笂瀹氱京鐨�銆係PI鎺ュ彛涓昏鎳�(y墨ng)鐢ㄥ湪EEPROM銆丗LASH銆佸(sh铆)鏅�(sh铆)鏅�(sh铆)閻�銆丄D杞�(zhu菐n)鎻涘櫒锛岄倓鏈夋暩(sh霉)瀛椾俊铏�(h脿o)铏曠悊鍣ㄥ拰鏁�(sh霉)瀛椾俊铏�(h脿o)瑙ｇ⒓鍣ㄤ箣闁�銆�
銆�銆�SPI鎺ュ彛鏄湪CPU鍜屽鍦嶄綆閫熷櫒浠朵箣闁撻��(j矛n)琛屽悓姝ヤ覆琛屾暩(sh霉)鎿�(j霉)鍌宠几锛屽湪涓诲櫒浠剁殑绉讳綅鑴堟矕涓�锛屾暩(sh霉)鎿�(j霉)鎸変綅鍌宠几锛屼綆浣嶅湪鍓�锛岄珮浣嶅湪鍚�锛岀偤鍏ㄩ洐宸ラ�氫俊锛屾暩(sh霉)鎿�(j霉)鍌宠几閫熷害绺介珨渚嗚姣擨2C绺界窔瑕佸揩锛岄�熷害鍙仈(d谩)鍒板咕Mbps銆�

鐗归粸(di菐n)

淇¤櫉(h脿o)绶氬皯锛屽崝(xi茅)璀扮啊(ji菐n)鍠�锛岀浉灏�(du矛)鏁�(sh霉)鎿�(j霉)閫熺巼楂�銆�

鎺ュ彛淇¤櫉(h脿o)

銆�?銆�?锛塎OSI 鈥� 涓诲櫒浠舵暩(sh霉)鎿�(j霉)杓稿嚭锛屽緸鍣ㄤ欢鏁�(sh霉)鎿�(j霉)杓稿叆
銆�?銆�?锛塎ISO 鈥� 涓诲櫒浠舵暩(sh霉)鎿�(j霉)杓稿叆锛屽緸鍣ㄤ欢鏁�(sh霉)鎿�(j霉)杓稿嚭
銆�銆�锛�3锛塖CLK 鈥撴檪(sh铆)閻樹俊铏�(h脿o)锛岀敱涓诲櫒浠剁敘(ch菐n)鐢�,鐐篺PCLK/2锛屽緸妯″紡闋荤巼鐐篺CPU/2
銆�?銆�?锛塏SS 鈥� 寰炲櫒浠朵娇鑳戒俊铏�(h脿o)锛岀敱涓诲櫒浠舵帶鍒�,鏈夌殑IC鏈�(hu矛)妯�(bi膩o)娉ㄧ偤CS(Chip select)
銆�銆�鍦ㄩ粸(di菐n)灏�(du矛)榛�(di菐n)鐨勯�氫俊涓�锛孲PI鎺ュ彛涓嶉渶瑕侀��(j矛n)琛屽皨鍧�鎿嶄綔锛屼笖鐐哄叏闆欏伐閫氫俊锛岄’寰楃啊(ji菐n)鍠珮鏁�銆傚湪澶氬��(g猫)寰炲櫒浠剁殑绯荤当(t菕ng)涓紝姣忓��(g猫)寰炲櫒浠堕渶瑕佺崹(d煤)绔嬬殑浣胯兘淇¤櫉(h脿o)锛岀‖浠朵笂姣擨2C绯荤当(t菕ng)瑕佺◢寰京(f霉)闆滀竴浜涖��
銆�銆�SPI鎺ュ彛鍦ㄥ収(n猫i)閮ㄧ‖浠跺(sh铆)闅涗笂鏄叐鍊�(g猫)绨�(ji菐n)鍠殑绉讳綅瀵勫瓨鍣�锛屽偝杓�?sh霉)鑷�?sh霉)鎿�(j霉)鐐�8浣�锛屽湪涓诲櫒浠剁敘(ch菐n)鐢熺殑寰炲櫒浠朵娇鑳戒俊铏�(h脿o)鍜岀Щ浣嶈剤娌栦笅锛屾寜浣嶅偝杓革紝楂樹綅鍦ㄥ墠锛屼綆浣嶅湪鍚庛�傚涓嬪湒鎵�绀�锛屽湪SCLK鐨勪笂鍗囨部涓婃暩(sh霉)鎿�(j霉)鏀硅畩锛屽悓鏅�(sh铆)涓�浣嶆暩(sh霉)鎿�(j霉)琚瓨鍏ョЩ浣嶅瘎瀛樺櫒銆�

鍘熺悊鍦�

锛孲PI鎺ュ彛鐨勪竴鍊�(g猫)缂洪粸(di菐n)锛氭矑鏈夋寚瀹氱殑娴佹帶鍒�锛屾矑鏈夋噳(y墨ng)绛旀(j墨)鍒剁⒑瑾�(r猫n)鏄惁鎺ユ敹鍒版暩(sh霉)鎿�(j霉)銆�

宸ヤ綔妯″紡

SPI鏈夊洓绋伐浣滄ā寮�,鍚勫��(g猫)宸ヤ綔妯″紡鐨勪笉鍚屽湪浜嶴CLK涓嶅悓, 鍏烽珨宸ヤ綔鐢盋POL,CPHA姹哄畾
CPOL: (Clock Polarity),鏅�(sh铆)閻樻サ鎬�
鐣�(d膩ng)CPOL鐐�0鏅�(sh铆),鏅�(sh铆)閻樼┖闁戞檪(sh铆)闆诲钩鐐轰綆;
鐣�(d膩ng)CPOL鐐�1鏅�(sh铆),鏅�(sh铆)閻樼┖闁戞檪(sh铆)闆诲钩鐐洪珮;
CPHA:(Clock Phase),鏅�(sh铆)閻樼浉浣�
鐣�(d膩ng)CPHA鐐�0鏅�(sh铆),鏅�(sh铆)閻樺懆鏈熺殑鍓嶄竴閭婄罚閲囬泦鏁�(sh霉)鎿�(j霉)锛屾檪(sh铆)閻樺懆鏈熺殑鍚庝竴閭婄罚杓稿嚭鏁�(sh霉)鎿�(j霉);
鐣�(d膩ng)CPHA鐐�1鏅�(sh铆),鏅�(sh铆)閻樺懆鏈熺殑鍚庝竴閭婄罚閲囬泦鏁�(sh霉)鎿�(j霉)锛屾檪(sh铆)閻樺懆鏈熺殑鍚庝竴閭婄罚杓稿嚭鏁�(sh霉)鎿�(j霉);
CPOL鍜孋PHA锛屽垎鍒ラ兘鍙互鏄�0鎴栨檪(sh铆)1锛屽皪(du矛)鎳�(y墨ng)鐨勫洓绋祫鍚堝氨鏄細

缍韩(k霉)闆诲瓙閫�锛岄浕瀛愮煡璀�(sh铆)锛屼竴鏌ョ櫨閫氾紒

宸叉敹閷勮姊�162085鍊�(g猫)