stm32 i2c dma.doc
55页
ifndef _＿ＡT2４C２56_H#ｄefｉnｅ ＿_ＡT2４C２56_H/* Incｌｕdes －－--－－--－－－－-－--－－－-------－---------－------－-－－－-－-----－-－－-------＊/#iｎcluｄe "stm32ｆ10x.h"＃iｆdef _＿cplusplｕｓ extern "C" {#ｅｎdｉｆ#defｉne Ｉ2C＿SPEED 3０００００#defiｎe Ｉ2Ｃ_ＳＬAVE_ＡDDＲＥSＳ７ 0xA０ #ｄｅfiｎe ｓEE_PＡGEＳＩZE ３２/* Maximuｍ numbｅr of ｔriａlｓ foｒ sEＥ_ＷaiｔＥｅpｒoｍStaｎdbyState（） ｆuｎｃtｉon */#deｆinｅ ｓEＥ_MAＸ_ＴRＩＡＬS＿ＮUMBEＲ １５0 /* Definｔiｏnｓ for ｔhｅ ｓｔate ｏf ｔhe ＤMA ｔrａnsfeｒ ＊/ ＃ｄｅfine ｓＥE＿STATE_RＥADY ０#dｅfinｅ sEE＿STATE＿ＢUＳＹ 1＃dｅfine ｓEＥ_SＴAＴE_ERROR 2 #dｅｆｉｎｅ sEE_ＯＫ 0＃dｅfiｎｅ sEE_FAIL １ #defｉｎe ｓEＥ_FＬAG＿TIMEＯＵT (（uinｔ32_t)0ｘ1００0)#defiｎe sEＥ_LONG_TＩMＥOUＴ (（uiｎt32_t）（10 * sＥE＿FLＡG_ＴIＭEOUT)）＃dｅfiｎｅ sＥE_I2C I2C1#definｅ sEE＿I2C_ＣＬＫ ＲＣC_AＰB1Perｉph＿I２C1#ｄefinｅ ｓEE＿I2C_ＳCＬ＿ＰＩN GPIO_Pin＿6 #deｆiｎe sEE＿I２C_SＣＬ＿ＧＰIO_ＰORT ＧPIＯＢ #dｅfｉｎe ｓEE＿I2Ｃ＿ＳCL_ＧPIO_CLK RＣC_AＰB２Periph_ＧＰIOB＃define sＥE_I2Ｃ_SDＡ＿PIＮ GＰIO＿Ｐiｎ_７ #ｄefｉnｅ ｓEE＿I2C_SDＡ＿GＰＩO＿POＲT GＰIＯB ＃ｄeｆｉｎe sEＥ_Ｉ2C＿SDＡ_GPIＯ_CＬK RＣC_ＡPB２Periph_ＧＰIOB#defｉne ｓEE_M24C64＿３２#ｄefinｅ sＥＥ_I2C_DMA DMA1 ＃defｉne sEE＿I2C_DMA_CＨANＮＥL＿ＴX DMA1＿Cｈanｎｅl6#ｄeｆｉｎe sＥＥ_I2C_DMA_ＣHＡNNEL_RX ＤMA1＿Chａｎnel7 #dｅfine sEＥ_I2C＿DＭＡ_ＦLＡG_ＴX_TC DMA１_IT_TＣ6 #deｆｉne sＥＥ_Ｉ２C_DMＡ_FLAG_TＸ_GL ＤMＡ1＿IT_GL６ #defｉｎe sEＥ＿I２Ｃ＿DＭA_ＦLAＧ＿RX_TＣ ＤMA１_IT_ＴC7 ＃dｅfinｅ ｓEE_I２C_DＭA＿FLＡG＿ＲX_ＧＬ DMA1_ＩＴ_ＧL7 #ｄefｉnｅ sEE_I２C_ＤＭＡ_ＣLK RCＣ＿AＨBＰｅｒiｐｈ_DMＡ1#deｆine sＥE_I2C_DR_Address ((uiｎt32＿t)0ｘ4０0０５４１0)#defiｎｅ sEE_ＵSE_ＤＭA ＃defiｎｅ sEE_Ｉ2C＿DＭA＿TX_IＲＱn DMＡ1＿Channel6_IRQｎ#deｆinｅ sEＥ_Ｉ２C_ＤMA_RX＿ＩRＱｎ DMA1_Chaｎneｌ７_ＩRＱｎ#deｆine sEE＿Ｉ２C_ＤMA_TＸ_IＲQＨanｄｌer DMA１_Chaｎnel6_ＩRQHandｌer#ｄｅｆine sEＥ_I2C＿DMA_RX_ＩRＱHaｎｄlｅr ＤMA1＿Cｈannｅl７_IRQHanｄleｒ #ｄefiｎｅ sEＥ_Ｉ2C_DＭA_PREPRIO ０＃definｅ sEＥ_Ｉ2C_DMA_SUＢPRIO 0 ＃ｄｅfine ｓEE_DＩRＥCＴIOＮ_TX ０#dｅfiｎe sEE_ＤＩRECTIＯN＿RX 1 ／* Tｉｍe cｏｎsｔａｎｔ ｆｏr the delay cａcluｌaｔｉｏn allowing to hａve ａ miｌliseconｄ iｎcrementｉng coｕｎtｅr． Tｈｉs ｖａlｕe shoｕld bｅ ｅquａｌ to （Sysｔｅm Cｌｏｃk ／ 1000）. iｅ. if system ｃｌock = 24MHｚ ｔhen sEE_TIＭE_CONＳT sｈouｌd ｂe 24． */#dｅfine sEE_TIMＥ＿ＣONＳT 4８ ｖoｉd sEE＿DeInit(ｖoid）；voiｄ sＥE＿Ｉnit(vｏid);uint３2_t sＥE＿RｅadBｕｆfｅr(uｉnt8_ｔ* pBuffer, uint１６＿t RｅadＡｄdr, uiｎｔ１6＿t＊ NｕmByｔｅＴoRead）;ｕiｎt32_ｔ sEE＿WｒｉｔeＰaｇｅ(uｉnt8＿t* pBｕffer, uiｎt１６_t ＷｒitｅAｄdｒ, ｕｉnｔ８_ｔ* NｕｍBｙteTｏＷritｅ）;voｉd ｓEE_WｒｉｔeBuｆfeｒ（ｕiｎｔ8_ｔ＊ pBｕffer, ｕinｔ１6＿t WrｉtｅＡddｒ， ｕint16_t NumＢｙtｅＴoＷriｔe)；ｕint３２_t sＥE_ＷaｉｔEeproｍＳｔanｄｂySｔaｔｅ(void);/* USＥR Cａllｂacks: Tｈｅse ａrｅ ｆuncｔionｓ ｆor wｈｉch pｒｏtoｔypeｓ only ａre ｄecｌarｅd ｉn EEＰＲOM dｒiver ａnd thaｔ shouｌd be implｅｍｅnｔｅd into uｓer applicaｉｔoｎ． *／ ／＊ ｓＥＥ_TＩMEOUT＿UserＣallｂａｃk（） fuｎcｔｉon is ｃａｌled wheｎever a ｔｉｍｅout coｎdiｔｉon oｃcｕre ｄuｒing coｍｍｕniｃａtion (wａｉting on an eｖｅｎt that doesｎ'ｔ oｃcｕr, ｂｕs errors, busy ｄｅｖiｃｅs ．..）． Ｙou cａn ｕse thｅ ｄefａｕlt tｉｍeｏｕt ｃalｌbaｃk ｉｍplemｅｎtａｔion ｂｙ ｕnｃｏmmeｎtiｎg tｈe dｅfine USＥ_DEＦＡUＬT_ＴＩMEＯUT_ＣＡLＬBAＣK ｉn stｍ３2＿evel＿i2c_ee.h fｉlｅ. Ｔyｐiｃalｌｙ the ｕｓer imｐleｍeｎtaｔiｏｎ ｏｆ thｉｓ cａllｂack shｏｕｌd reset I2C ｐｅｒipｈeral aｎｄ re-ｉnitｉaｌiｚe commｕｎｉcatioｎ or in ｗorst case reｓet all tｈe ａpｐlicatiｏn. ＊/uｉｎt3２＿ｔ sEE_TIＭEＯUT＿UｓｅrCａｌlbａｃk(ｖｏｉd);/* Stａrt aｎd Ｅnｄ of ｃrｉtiｃaｌ section： ｔhesｅ calｌｂaｃks ｓhｏuｌd ｂe tｙpically uｓｅd tｏ ｄiｓaｂle intｅｒrｕｐｔｓ wheｎ eｎtering ａ ｃriｔicａｌ section of Ｉ2C coｍmunｉcaｔｉｏn You ｍａy use dｅfａuｌｔ ｃａllbacks pｒｏvｉｄed ｉnto this ｄriｖeｒ by ｕncommｅnｔinｇ thｅ defｉｎｅ UＳＥ_DEFＡUＬT_CＲＩTIＣAＬ_CＡＬＬＢＡＣK in sｔm3２＿eveｌ_i2c_eｅ.ｈ file.. Oｒ yoｕ ｃａｎ cｏmmｅnt thaｔ liｎe ａｎｄ iｍplｅmeｎt ｔhese cａｌlｂａcｋs iｎｔo ｙoｕｒ applicａtｉon *／vｏｉd sEE＿EｎtｅｒCriticalSection＿UserＣaｌｌbaｃk(void);void ｓＥＥ_ExｉtＣrｉｔicalＳecｔｉon＿UserCallbａｃk（ｖoid)；＃ｉfｄef __ｃplusplｕｓ}#ｅｎｄif＃endif 如下是Ｃ文献#ｉｎclude "aｔ2４c2５6.h＂＿＿IO ｕinｔ1６＿t ｓEEAddreｓs = 0xa0； __IＯ uiｎt3２＿t ｓEETｉｍeｏｕｔ ＝ sEE_ＬＯNG_TＩMＥOUＴ; _＿ＩO uｉnt１6_ｔ* ｓＥEDaｔaReadPｏinter; ＿_IO uinｔ8＿ｔ* ｓEEDaｔaWrｉtｅＰointer； _＿ＩO uint8_t sＥＥDaｔaNｕm;DＭA＿InｉｔTypeDef sEＥＤＭＡ＿InｉtStrｕｃtuｒe;ｖoiｄ sEE＿ＬowLeveｌ＿ＤeInｉｔ(voｉd){ GPＩO＿IｎiｔTｙpｅDｅf ＧＰIO＿InｉtStｒｕctｕre; NVＩC＿IniｔTｙｐeＤef NVIC_ＩnｉtＳtｒuｃｔure; /* sＥE_Ｉ2C Peripheral Dｉｓaｂlｅ ＊/ I２Ｃ_Ｃmd(ｓEＥ＿Ｉ2C， ＤＩSＡBLE); /＊ sEE_I2C DｅInit *／ Ｉ2Ｃ_ＤeＩnit(sEE＿I2C); ／*!< ｓEE＿I2C Peｒiph clｏｃｋ disabｌe */ ＲＣC_ＡＰB1ＰｅriphClocｋＣmd(sEＥ_I２C＿CLK, DＩＳABLE）; /*！＜ GPIＯ ｃoｎｆiｇuratｉｏn */ /＊！< Confｉgure ｓEE_I２C pｉns: SＣL */ GＰIO_ＩnｉtＳｔｒuctｕrｅ.ＧPIO_Ｐiｎ = sEE＿Ｉ2Ｃ_ＳＣL_ＰＩN; ＧＰIO＿IｎitＳtruｃtｕre.ＧＰIＯ_Mode = ＧＰＩＯ_Modｅ_。
