54 lines
2.3 KiB
C
54 lines
2.3 KiB
C
/******************************************************************************************************************************************
|
|
* 文件名称: SWM320_sram.c
|
|
* 功能说明: SWM320单片机的SRAM驱动程序
|
|
* 技术支持: http://www.synwit.com.cn/e/tool/gbook/?bid=1
|
|
* 注意事项:
|
|
* 版本日期: V1.1.0 2017年10月25日
|
|
* 升级记录:
|
|
*
|
|
*
|
|
*******************************************************************************************************************************************
|
|
* @attention
|
|
*
|
|
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION
|
|
* REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, SYNWIT SHALL NOT BE HELD LIABLE
|
|
* FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
|
|
* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONN-
|
|
* -ECTION WITH THEIR PRODUCTS.
|
|
*
|
|
* COPYRIGHT 2012 Synwit Technology
|
|
*******************************************************************************************************************************************/
|
|
#include "SWM320.h"
|
|
#include "SWM320_sram.h"
|
|
|
|
|
|
/******************************************************************************************************************************************
|
|
* 函数名称: SRAM_Init()
|
|
* 功能说明: SRAM控制器初始化
|
|
* 输 入: SRAM_InitStructure * initStruct 包含 SRAM 控制器相关设定值的结构体
|
|
* 输 出: 无
|
|
* 注意事项: 无
|
|
******************************************************************************************************************************************/
|
|
void SRAM_Init(SRAM_InitStructure * initStruct)
|
|
{
|
|
uint32_t i;
|
|
|
|
// 配置SRAM前需要刷新下SDRAM控制器
|
|
do {
|
|
SYS->CLKEN |= (1 << SYS_CLKEN_SDRAM_Pos);
|
|
|
|
while(SDRAMC->REFDONE == 0);
|
|
SDRAMC->REFRESH &= ~(1 << SDRAMC_REFRESH_EN_Pos);
|
|
|
|
for(i = 0; i < 1000; i++) __NOP();
|
|
SYS->CLKEN &= ~(1 << SYS_CLKEN_SDRAM_Pos);
|
|
} while(0);
|
|
|
|
SYS->CLKEN |= (1 << SYS_CLKEN_RAMC_Pos);
|
|
for(i = 0; i < 10; i++) __NOP();
|
|
|
|
SRAMC->CR = (initStruct->ClkDiv << SRAMC_CR_RWTIME_Pos) |
|
|
(initStruct->DataWidth << SRAMC_CR_BYTEIF_Pos) |
|
|
(0 << SRAMC_CR_HBLBDIS_Pos); // 使能字节、半字访问
|
|
}
|