54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
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/******************************************************************************************************************************************
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* <EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: SWM320_sram.c
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: SWM320<EFBFBD><EFBFBD>Ƭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>SRAM<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>֧<EFBFBD><EFBFBD>: http://www.synwit.com.cn/e/tool/gbook/?bid=1
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* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
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* <EFBFBD>汾<EFBFBD><EFBFBD><EFBFBD><EFBFBD>: V1.1.0 2017<EFBFBD><EFBFBD>10<EFBFBD><EFBFBD>25<EFBFBD><EFBFBD>
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼:
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*
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*
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*******************************************************************************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION
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* REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, SYNWIT SHALL NOT BE HELD LIABLE
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* FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONN-
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* -ECTION WITH THEIR PRODUCTS.
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*
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* COPYRIGHT 2012 Synwit Technology
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*******************************************************************************************************************************************/
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#include "SWM320.h"
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#include "SWM320_sram.h"
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/******************************************************************************************************************************************
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: SRAM_Init()
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: SRAM<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: SRAM_InitStructure * initStruct <EFBFBD><EFBFBD><EFBFBD><EFBFBD> SRAM <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>趨ֵ<EFBFBD>Ľṹ<EFBFBD><EFBFBD>
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
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* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
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******************************************************************************************************************************************/
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void SRAM_Init(SRAM_InitStructure * initStruct)
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{
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uint32_t i;
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// <20><><EFBFBD><EFBFBD>SRAMǰ<4D><C7B0>Ҫˢ<D2AA><CBA2><EFBFBD><EFBFBD>SDRAM<41><4D><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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do {
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SYS->CLKEN |= (1 << SYS_CLKEN_SDRAM_Pos);
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while(SDRAMC->REFDONE == 0);
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SDRAMC->REFRESH &= ~(1 << SDRAMC_REFRESH_EN_Pos);
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for(i = 0; i < 1000; i++) __NOP();
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SYS->CLKEN &= ~(1 << SYS_CLKEN_SDRAM_Pos);
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} while(0);
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SYS->CLKEN |= (1 << SYS_CLKEN_RAMC_Pos);
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for(i = 0; i < 10; i++) __NOP();
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SRAMC->CR = (initStruct->ClkDiv << SRAMC_CR_RWTIME_Pos) |
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(initStruct->DataWidth << SRAMC_CR_BYTEIF_Pos) |
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(0 << SRAMC_CR_HBLBDIS_Pos); // ʹ<><CAB9><EFBFBD>ֽڡ<D6BD><DAA1><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>
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}
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