| GPIO_InitTypeDef GPIO_InitStructure; | |||
| RCC_APB2PeriphClockCmd( | RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1,ENABLE ); | ||
| //PA5 SCLK ʱÖÓ | |||
| //PA7 SDI ´ÓÈëÖ÷³ö | |||
| //PA6 SDO ´Ó³öÖ÷Èë | |||
| //¾Ý˵¸´ÓÃÊä³öÊÇ¿ÉÒÔÊäÈëµÄ | |||
| GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6|GPIO_Pin_7; | |||
| GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍì | |||
| GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; | |||
| GPIO_Init(GPIOA, GPIO_InitStructure); | |||
| //GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7); | |||
| SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //ÉèÖÃSPIµ¥Ïò»òÕßË«ÏòµÄÊý¾Ýģʽ:SPIÉèÖÃΪ˫ÏßË«ÏòÈ«Ë«¹¤ | |||
| SPI_InitStructure.SPI_Mode = SPI_Mode_Master; | //ÉèÖÃSPI¹¤×÷ģʽ:ÉèÖÃΪÖ÷SPI | ||
| SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; | //ÉèÖÃSPIµÄÊý¾Ý´óС:SPI·¢ËͽÓÊÕ8λ֡½á¹¹ | ||
| SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; | //Ñ¡ÔñÁË´ ÐÐʱÖÓµÄÎÈ̬:ʱÖÓÐü¿ÕµÍ | ||
| SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; | //Êý¾Ý²¶»ñÓÚµÚÒ»¸öʱÖÓÑØ | ||
| SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; | //NSSÐźÅÓÉÓ²¼þ£¨NSS¹Ü½Å£ »¹ÊÇÈí¼þ£¨Ê¹ÓÃSSIλ£¹ÜÀí:ÄÚ²¿NSSÐźÅÓÐSSIλ¿ØÖÆ | ||
| SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; | //¶¨Ò岨ÌØÂÊÔ¤·ÖƵµÄÖµ:²¨ÌØÂÊÔ¤·ÖƵֵΪ256 | ||
| SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; | //Ö¸¶¨Êý¾Ý´«Êä´ÓMSBλ»¹ÊÇLSBλ¿ªÊ¼:Êý¾Ý´«Êä´ÓMSBλ¿ªÊ¼ | ||
| SPI_InitStructure.SPI_CRCPolynomial = 7; | //CRCÖµ¼ÆËãµÄ¶àÏîʽ | ||
| SPI_Init(SPI1, SPI_InitStructure); //¸ù¾ÝSPI_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèSPIx¼Ä´æÆ÷ | |||
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