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发表于 2015-4-27 19:48:51
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- RCC->AHBENR|=1<<8; //ʹÄÜFSMCʱÖÓ
- RCC->APB2ENR|=1<<3; //ʹÄÜPORTBʱÖÓ
- RCC->APB2ENR|=1<<5; //ʹÄÜPORTDʱÖÓ
- RCC->APB2ENR|=1<<6; //ʹÄÜPORTEʱÖÓ
- GPIOB->CRL&=0XFFFFFF0F; //PB0 ÍÆÍìÊä³ö ±³¹â
- GPIOB->CRL|=0X00000030;
- //PORTD¸´ÓÃÍÆÍìÊä³ö
- GPIOD->CRH&=0X00FF0000;
- GPIOD->CRH|=0XBB00BBBB;
- GPIOD->CRL&=0X0F00FF00;
- GPIOD->CRL|=0XB0BB00BB;
- //PORTE¸´ÓÃÍÆÍìÊä³ö
- GPIOE->CRH&=0X00000000;
- GPIOE->CRH|=0XBBBBBBBB;
- GPIOE->CRL&=0X0FFFFFFF;
- GPIOE->CRL|=0XB0000000;
- //¼Ä´æÆ÷ÇåÁã
- //bank1ÓÐNE1~4,ÿһ¸öÓÐÒ»¸öBCR+TCR£¬ËùÒÔ×ܹ²°Ë¸ö¼Ä´æÆ÷¡£
- //ÕâÀïÎÒÃÇʹÓÃNE4 £¬Ò²¾Í¶ÔÓ¦BTCR[6],[7]¡£
- FSMC_Bank1->BTCR[0]=0X00000000;
- FSMC_Bank1->BTCR[1]=0X00000000;
- FSMC_Bank1E->BWTR[0]=0X00000000;
- //²Ù×÷BCR¼Ä´æÆ÷ ʹÓÃÒ첽ģʽ
- FSMC_Bank1->BTCR[0]|=1<<12; //´æ´¢Æ÷дʹÄÜ
- FSMC_Bank1->BTCR[0]|=1<<14; //¶ÁдʹÓò»Í¬µÄʱÐò
- FSMC_Bank1->BTCR[0]|=1<<4; //´æ´¢Æ÷Êý¾Ý¿í¶ÈΪ16bit
- //²Ù×÷BTR¼Ä´æÆ÷
- //¶ÁʱÐò¿ØÖƼĴæÆ÷
- FSMC_Bank1->BTCR[1]|=0<<28; //ģʽA
- FSMC_Bank1->BTCR[1]|=1<<0; //µØÖ·½¨Á¢Ê±¼ä£¨ADDSET£©Îª2¸öHCLK 1/36M=27ns
- //ÒòΪҺ¾§Çý¶¯ICµÄ¶ÁÊý¾ÝµÄʱºò£¬ËٶȲ»ÄÜÌ«¿ì£¬ÓÈÆä¶Ô1289Õâ¸öIC¡£
- FSMC_Bank1->BTCR[1]|=0XF<<8; //Êý¾Ý±£´æʱ¼äΪ16¸öHCLK
- //дʱÐò¿ØÖƼĴæÆ÷
- FSMC_Bank1E->BWTR[0]|=0<<28; //ģʽA
- FSMC_Bank1E->BWTR[0]|=0<<0; //µØÖ·½¨Á¢Ê±¼ä£¨ADDSET£©Îª1¸öHCLK
- //4¸öHCLK£¨HCLK=72M£©ÒòΪҺ¾§Çý¶¯ICµÄдÐźÅÂö¿í£¬×îÉÙÒ²µÃ50ns¡£72M/4=24M=55ns
- FSMC_Bank1E->BWTR[0]|=3<<8; //Êý¾Ý±£´æʱ¼äΪ4¸öHCLK
- //ʹÄÜBANK1,ÇøÓò4
- FSMC_Bank1->BTCR[0]|=1<<0; //ʹÄÜBANK1£¬ÇøÓò4
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