568 lines
17 KiB
C
568 lines
17 KiB
C
/**
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******************************************************************************
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* @file bsp_sdram.c
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* @author fire
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* @version V1.0
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* @date 2015-xx-xx
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* @brief sdram应用函数接口
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******************************************************************************
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* @attention
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*
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* 实验平台:野火 STM32 H750 开发板
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* 论坛 :http://www.chuxue123.com
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* 淘宝 :http://firestm32.taobao.com
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*
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******************************************************************************
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*/
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#include "./sdram/bsp_sdram.h"
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static FMC_SDRAM_CommandTypeDef Command;
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SDRAM_HandleTypeDef hsdram1;
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#define sdramHandle hsdram1
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/**
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* @brief 延迟一段时间
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* @param 延迟的时间长度
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* @retval None
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*/
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static void SDRAM_delay(__IO uint32_t nCount)
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{
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__IO uint32_t index = 0;
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for(index = (100000 * nCount); index != 0; index--)
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{
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}
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}
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/**
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* @brief 初始化控制SDRAM的IO
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* @param 无
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* @retval 无
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*/
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static void SDRAM_GPIO_Config(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* 使能SDRAM相关的IO时钟 */
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/*地址信号线*/
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FMC_A0_GPIO_CLK();FMC_A1_GPIO_CLK(); FMC_A2_GPIO_CLK();
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FMC_A3_GPIO_CLK();FMC_A4_GPIO_CLK(); FMC_A5_GPIO_CLK();
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FMC_A6_GPIO_CLK();FMC_A7_GPIO_CLK(); FMC_A8_GPIO_CLK();
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FMC_A9_GPIO_CLK();FMC_A10_GPIO_CLK();FMC_A11_GPIO_CLK();
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FMC_A12_GPIO_CLK();
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/*数据信号线*/
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FMC_D0_GPIO_CLK(); FMC_D1_GPIO_CLK() ; FMC_D2_GPIO_CLK() ;
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FMC_D3_GPIO_CLK(); FMC_D4_GPIO_CLK() ; FMC_D5_GPIO_CLK() ;
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FMC_D6_GPIO_CLK(); FMC_D7_GPIO_CLK() ; FMC_D8_GPIO_CLK() ;
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FMC_D9_GPIO_CLK(); FMC_D10_GPIO_CLK(); FMC_D11_GPIO_CLK();
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FMC_D12_GPIO_CLK();FMC_D13_GPIO_CLK(); FMC_D14_GPIO_CLK();
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FMC_D15_GPIO_CLK();FMC_D16_GPIO_CLK(); FMC_D17_GPIO_CLK();
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FMC_D18_GPIO_CLK();FMC_D19_GPIO_CLK(); FMC_D20_GPIO_CLK();
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FMC_D21_GPIO_CLK();FMC_D22_GPIO_CLK(); FMC_D23_GPIO_CLK();
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FMC_D24_GPIO_CLK();FMC_D25_GPIO_CLK(); FMC_D26_GPIO_CLK();
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FMC_D27_GPIO_CLK();FMC_D28_GPIO_CLK(); FMC_D29_GPIO_CLK();
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FMC_D30_GPIO_CLK();FMC_D31_GPIO_CLK();
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/*控制信号线*/
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FMC_CS_GPIO_CLK() ; FMC_BA0_GPIO_CLK(); FMC_BA1_GPIO_CLK() ;
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FMC_WE_GPIO_CLK() ; FMC_RAS_GPIO_CLK(); FMC_CAS_GPIO_CLK();
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FMC_CLK_GPIO_CLK(); FMC_CKE_GPIO_CLK(); FMC_UDQM_GPIO_CLK();
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FMC_LDQM_GPIO_CLK();FMC_UDQM2_GPIO_CLK();FMC_LDQM2_GPIO_CLK();
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/*-- SDRAM IO 配置 -----------------------------------------------------*/
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GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;//配置为复用功能
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GPIO_InitStructure.Pull = GPIO_PULLUP;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStructure.Alternate = GPIO_AF12_FMC;
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/*地址信号线 针对引脚配置*/
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GPIO_InitStructure.Pin = FMC_A0_GPIO_PIN;
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HAL_GPIO_Init(FMC_A0_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A1_GPIO_PIN;
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HAL_GPIO_Init(FMC_A1_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A2_GPIO_PIN;
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HAL_GPIO_Init(FMC_A2_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A3_GPIO_PIN;
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HAL_GPIO_Init(FMC_A3_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A4_GPIO_PIN;
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HAL_GPIO_Init(FMC_A4_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A5_GPIO_PIN;
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HAL_GPIO_Init(FMC_A5_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A6_GPIO_PIN;
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HAL_GPIO_Init(FMC_A6_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A7_GPIO_PIN;
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HAL_GPIO_Init(FMC_A7_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A8_GPIO_PIN;
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HAL_GPIO_Init(FMC_A8_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A9_GPIO_PIN;
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HAL_GPIO_Init(FMC_A9_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A10_GPIO_PIN;
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HAL_GPIO_Init(FMC_A10_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A11_GPIO_PIN;
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HAL_GPIO_Init(FMC_A11_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_A12_GPIO_PIN;
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HAL_GPIO_Init(FMC_A12_GPIO_PORT, &GPIO_InitStructure);
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/*数据信号线 针对引脚配置*/
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GPIO_InitStructure.Pin = FMC_D0_GPIO_PIN;
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HAL_GPIO_Init(FMC_D0_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D1_GPIO_PIN;
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HAL_GPIO_Init(FMC_D1_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D2_GPIO_PIN;
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HAL_GPIO_Init(FMC_D2_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D3_GPIO_PIN;
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HAL_GPIO_Init(FMC_D3_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D4_GPIO_PIN;
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HAL_GPIO_Init(FMC_D4_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D5_GPIO_PIN;
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HAL_GPIO_Init(FMC_D5_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D6_GPIO_PIN;
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HAL_GPIO_Init(FMC_D6_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D7_GPIO_PIN;
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HAL_GPIO_Init(FMC_D7_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D8_GPIO_PIN;
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HAL_GPIO_Init(FMC_D8_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D9_GPIO_PIN;
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HAL_GPIO_Init(FMC_D9_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D10_GPIO_PIN;
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HAL_GPIO_Init(FMC_D10_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D11_GPIO_PIN;
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HAL_GPIO_Init(FMC_D11_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D12_GPIO_PIN;
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HAL_GPIO_Init(FMC_D12_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D13_GPIO_PIN;
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HAL_GPIO_Init(FMC_D13_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D14_GPIO_PIN;
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HAL_GPIO_Init(FMC_D14_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D15_GPIO_PIN;
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HAL_GPIO_Init(FMC_D15_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D16_GPIO_PIN;
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HAL_GPIO_Init(FMC_D16_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D17_GPIO_PIN;
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HAL_GPIO_Init(FMC_D17_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D18_GPIO_PIN;
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HAL_GPIO_Init(FMC_D18_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D19_GPIO_PIN;
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HAL_GPIO_Init(FMC_D19_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D20_GPIO_PIN;
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HAL_GPIO_Init(FMC_D20_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D21_GPIO_PIN;
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HAL_GPIO_Init(FMC_D21_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D22_GPIO_PIN;
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HAL_GPIO_Init(FMC_D22_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D23_GPIO_PIN;
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HAL_GPIO_Init(FMC_D23_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D24_GPIO_PIN;
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HAL_GPIO_Init(FMC_D24_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D25_GPIO_PIN;
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HAL_GPIO_Init(FMC_D25_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D26_GPIO_PIN;
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HAL_GPIO_Init(FMC_D26_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D27_GPIO_PIN;
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HAL_GPIO_Init(FMC_D27_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D28_GPIO_PIN;
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HAL_GPIO_Init(FMC_D28_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D29_GPIO_PIN;
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HAL_GPIO_Init(FMC_D29_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D30_GPIO_PIN;
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HAL_GPIO_Init(FMC_D30_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_D31_GPIO_PIN;
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HAL_GPIO_Init(FMC_D31_GPIO_PORT, &GPIO_InitStructure);
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/*控制信号线*/
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GPIO_InitStructure.Pin = FMC_CS_GPIO_PIN;
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HAL_GPIO_Init(FMC_CS_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_BA0_GPIO_PIN;
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HAL_GPIO_Init(FMC_BA0_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_BA1_GPIO_PIN;
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HAL_GPIO_Init(FMC_BA1_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_WE_GPIO_PIN;
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HAL_GPIO_Init(FMC_WE_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_RAS_GPIO_PIN;
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HAL_GPIO_Init(FMC_RAS_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_CAS_GPIO_PIN;
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HAL_GPIO_Init(FMC_CAS_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_CLK_GPIO_PIN;
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HAL_GPIO_Init(FMC_CLK_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_CKE_GPIO_PIN;
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HAL_GPIO_Init(FMC_CKE_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_UDQM_GPIO_PIN;
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HAL_GPIO_Init(FMC_UDQM_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_LDQM_GPIO_PIN;
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HAL_GPIO_Init(FMC_LDQM_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_UDQM2_GPIO_PIN;
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HAL_GPIO_Init(FMC_UDQM2_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = FMC_LDQM2_GPIO_PIN;
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HAL_GPIO_Init(FMC_LDQM2_GPIO_PORT, &GPIO_InitStructure);
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}
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/**
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* @brief 对SDRAM芯片进行初始化配置
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* @param None.
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* @retval None.
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*/
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static void SDRAM_InitSequence(void)
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{
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uint32_t tmpr = 0;
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/* Step 1 ----------------------------------------------------------------*/
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/* 配置命令：开启提供给SDRAM的时钟 */
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Command.CommandMode = FMC_SDRAM_CMD_CLK_ENABLE;
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Command.CommandTarget = FMC_COMMAND_TARGET_BANK;
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Command.AutoRefreshNumber = 1;
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Command.ModeRegisterDefinition = 0;
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/* 发送配置命令 */
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HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);
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/* Step 2: 延时100us */
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SDRAM_delay(1);
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/* Step 3 ----------------------------------------------------------------*/
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/* 配置命令：对所有的bank预充电 */
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Command.CommandMode = FMC_SDRAM_CMD_PALL;
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Command.CommandTarget = FMC_COMMAND_TARGET_BANK;
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Command.AutoRefreshNumber = 1;
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Command.ModeRegisterDefinition = 0;
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/* 发送配置命令 */
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HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);
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/* Step 4 ----------------------------------------------------------------*/
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/* 配置命令：自动刷新 */
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Command.CommandMode = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
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Command.CommandTarget = FMC_COMMAND_TARGET_BANK;
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Command.AutoRefreshNumber = 8;
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Command.ModeRegisterDefinition = 0;
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/* 发送配置命令 */
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HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);
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/* Step 5 ----------------------------------------------------------------*/
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/* 设置sdram寄存器配置 */
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tmpr = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_1 |
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SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL |
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SDRAM_MODEREG_CAS_LATENCY_3 |
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SDRAM_MODEREG_OPERATING_MODE_STANDARD |
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SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;
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/* 配置命令：设置SDRAM寄存器 */
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Command.CommandMode = FMC_SDRAM_CMD_LOAD_MODE;
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Command.CommandTarget = FMC_COMMAND_TARGET_BANK;
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Command.AutoRefreshNumber = 1;
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Command.ModeRegisterDefinition = tmpr;
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/* 发送配置命令 */
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HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);
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/* Step 6 ----------------------------------------------------------------*/
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/* 设置刷新计数器 */
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/* 刷新周期=64ms/8192行=7.8125us */
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/* COUNT=(7.8125us x Freq) - 20 */
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/* 设置自刷新速率 */
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HAL_SDRAM_ProgramRefreshRate(&sdramHandle, 824);
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}
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/**
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* @brief 初始化配置使用SDRAM的FMC及GPIO接口，
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* 本函数在SDRAM读写操作前需要被调用
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* @param None
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* @retval None
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*/
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void SDRAM_Init(void)
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{
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//使能GPIO口时钟
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RCC->AHB4ENR |= 0x1FC;
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//配置端口C、D、E、F、G、H、I相应的引脚为复用推挽输出
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GPIOC->MODER = 0xFFFFFFFE;
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GPIOC->OTYPER = 0;
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GPIOC->OSPEEDR = 0x00000003;
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GPIOC->PUPDR = 0x00000001;
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GPIOC->AFR[0] = 0x0000000C;
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GPIOD->MODER = 0xAFEAFFFA;
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GPIOD->OTYPER = 0;
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GPIOD->OSPEEDR = 0xF03F000F;
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GPIOD->PUPDR = 0x50150005;
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GPIOD->AFR[0] = 0x000000CC;
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GPIOD->AFR[1] = 0xCC000CCC;
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GPIOE->MODER = 0xAAAABFFA;
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GPIOE->OTYPER = 0;
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GPIOE->OSPEEDR = 0xFFFFC00F;
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GPIOE->PUPDR = 0x55554005;
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GPIOE->AFR[0] = 0xC00000CC;
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GPIOE->AFR[1] = 0xCCCCCCCC;
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GPIOF->MODER = 0xAABFFAAA;
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GPIOF->OTYPER = 0;
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GPIOF->OSPEEDR = 0xFFC00FFF;
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GPIOF->PUPDR = 0x55400555;
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GPIOF->AFR[0] = 0x00CCCCCC;
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GPIOF->AFR[1] = 0xCCCCC000;
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GPIOG->MODER = 0xBFFEFAEA;
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GPIOG->OTYPER = 0;
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GPIOG->OSPEEDR = 0xC0030F3F;
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GPIOG->PUPDR = 0x40010515;
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GPIOG->AFR[0] = 0x00CC0CCC;
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GPIOG->AFR[1] = 0xC000000C;
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GPIOH->MODER = 0xAAAAAFFF;
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GPIOH->OTYPER = 0;
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GPIOH->OSPEEDR = 0xFFFFF000;
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GPIOH->PUPDR = 0x55555000;
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GPIOH->AFR[0] = 0xCC000000;
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GPIOH->AFR[1] = 0xCCCCCCCC;
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GPIOI->MODER = 0xFFEBAAAA;
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GPIOI->OTYPER = 0;
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GPIOI->OSPEEDR = 0x003CFFFF;
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GPIOI->PUPDR = 0x00145555;
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GPIOI->AFR[0] = 0xCCCCCCCC;
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GPIOI->AFR[1] = 0x00000CC0;
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// //使能PLL2R
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// RCC->PLLCFGR |= (1 << 21);
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// //禁用PLL2
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// RCC->CR &= ~(1 << 26);
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// RCC->PLLCKSELR |= (5 << 12);
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// RCC->PLL2DIVR = 0x0201028F;
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// RCC->PLLCFGR |= (2<<6);
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// RCC->PLLCFGR &= ~(1<<5);
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// RCC->CR |= (1 << 26);
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// while(!(RCC->CR&(1<<27)));
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//RCC->D1CCIPR |= (1<<0);
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//使能FMC时钟
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RCC->AHB3ENR |= (1 << 12);
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FMC_SDRAM_DEVICE->SDCR[0] = 0x00003AD0;
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FMC_SDRAM_DEVICE->SDCR[1] = 0x000001E9;
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FMC_SDRAM_DEVICE->SDTR[0] = 0x0F1F7FFF;
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FMC_SDRAM_DEVICE->SDTR[1] = 0x01010471;
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FMC_Bank1_R->BTCR[0] |= 0x80000000;
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/* Step 1 ----------------------------------------------------------------*/
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/* 配置命令：开启提供给SDRAM的时钟 */
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FMC_SDRAM_DEVICE->SDCMR = 0x00000009;
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while((FMC_SDRAM_DEVICE->SDSR&(1<<5)));
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/* Step 2: 延时100us */
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SDRAM_delay(1);
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/* Step 3 ----------------------------------------------------------------*/
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/* 配置命令：对所有的bank预充电 */
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FMC_SDRAM_DEVICE->SDCMR = 0x0000000A;
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while((FMC_SDRAM_DEVICE->SDSR&(1<<5)));
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/* Step 4 ----------------------------------------------------------------*/
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/* 配置命令：自动刷新 */
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FMC_SDRAM_DEVICE->SDCMR = 0x000000EB;
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while((FMC_SDRAM_DEVICE->SDSR&(1<<5)));
|
||
|
||
/* Step 5 ----------------------------------------------------------------*/
|
||
/* 设置sdram寄存器配置 */
|
||
FMC_SDRAM_DEVICE->SDCMR =0x0004600C;
|
||
while((FMC_SDRAM_DEVICE->SDSR&(1<<5)));
|
||
/* Step 6 ----------------------------------------------------------------*/
|
||
/* 设置自刷新速率 */
|
||
FMC_SDRAM_DEVICE->SDRTR |= (1855<<1);
|
||
}
|
||
|
||
|
||
|
||
/**
|
||
* @brief 以“字”为单位向sdram写入数据
|
||
* @param pBuffer: 指向数据的指针
|
||
* @param uwWriteAddress: 要写入的SDRAM内部地址
|
||
* @param uwBufferSize: 要写入数据大小
|
||
* @retval None.
|
||
*/
|
||
void SDRAM_WriteBuffer(uint32_t* pBuffer, uint32_t uwWriteAddress, uint32_t uwBufferSize)
|
||
{
|
||
__IO uint32_t write_pointer = (uint32_t)uwWriteAddress;
|
||
|
||
/* 禁止写保护 */
|
||
HAL_SDRAM_WriteProtection_Disable(&hsdram1);
|
||
/* 检查SDRAM标志，等待至SDRAM空闲 */
|
||
while(HAL_SDRAM_GetState(&hsdram1) != RESET)
|
||
{
|
||
}
|
||
|
||
/* 循环写入数据 */
|
||
for (; uwBufferSize != 0; uwBufferSize--)
|
||
{
|
||
/* 发送数据到SDRAM */
|
||
*(uint32_t *) (SDRAM_BANK_ADDR + write_pointer) = *pBuffer++;
|
||
|
||
/* 地址自增*/
|
||
write_pointer += 4;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* @brief 从SDRAM中读取数据
|
||
* @param pBuffer: 指向存储数据的buffer
|
||
* @param ReadAddress: 要读取数据的地十
|
||
* @param uwBufferSize: 要读取的数据大小
|
||
* @retval None.
|
||
*/
|
||
void SDRAM_ReadBuffer(uint32_t* pBuffer, uint32_t uwReadAddress, uint32_t uwBufferSize)
|
||
{
|
||
__IO uint32_t write_pointer = (uint32_t)uwReadAddress;
|
||
|
||
|
||
/* 检查SDRAM标志，等待至SDRAM空闲 */
|
||
while ( HAL_SDRAM_GetState(&hsdram1) != RESET)
|
||
{
|
||
}
|
||
|
||
/*读取数据 */
|
||
for(; uwBufferSize != 0x00; uwBufferSize--)
|
||
{
|
||
*pBuffer++ = *(__IO uint32_t *)(SDRAM_BANK_ADDR + write_pointer );
|
||
|
||
/* 地址自增*/
|
||
write_pointer += 4;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* @brief 测试SDRAM是否正常
|
||
* @param None
|
||
* @retval 正常返回1，异常返回0
|
||
*/
|
||
uint8_t SDRAM_Test(void)
|
||
{
|
||
/*写入数据计数器*/
|
||
uint32_t counter=0;
|
||
|
||
/* 8位的数据 */
|
||
uint8_t ubWritedata_8b = 0, ubReaddata_8b = 0;
|
||
|
||
/* 16位的数据 */
|
||
uint16_t uhWritedata_16b = 0, uhReaddata_16b = 0;
|
||
|
||
SDRAM_INFO("正在检测SDRAM，以8位、16位的方式读写sdram...");
|
||
|
||
|
||
/*按8位格式读写数据，并校验*/
|
||
|
||
/* 把SDRAM数据全部重置为0 ，SDRAM_SIZE是以8位为单位的 */
|
||
for (counter = 0x00; counter < SDRAM_SIZE; counter++)
|
||
{
|
||
*(__IO uint8_t*) (SDRAM_BANK_ADDR + counter) = (uint8_t)0x0;
|
||
}
|
||
|
||
/* 向整个SDRAM写入数据 8位 */
|
||
for (counter = 0; counter < SDRAM_SIZE; counter++)
|
||
{
|
||
*(__IO uint8_t*) (SDRAM_BANK_ADDR + counter) = (uint8_t)(ubWritedata_8b + counter);
|
||
}
|
||
|
||
/* 读取 SDRAM 数据并检测*/
|
||
for(counter = 0; counter<SDRAM_SIZE;counter++ )
|
||
{
|
||
ubReaddata_8b = *(__IO uint8_t*)(SDRAM_BANK_ADDR + counter); //从该地址读出数据
|
||
|
||
if(ubReaddata_8b != (uint8_t)(ubWritedata_8b + counter)) //检测数据，若不相等，跳出函数,返回检测失败结果。
|
||
{
|
||
SDRAM_ERROR("8位数据读写错误！出错位置：%d",counter);
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
|
||
/*按16位格式读写数据，并检测*/
|
||
|
||
/* 把SDRAM数据全部重置为0 */
|
||
for (counter = 0x00; counter < SDRAM_SIZE/2; counter++)
|
||
{
|
||
*(__IO uint16_t*) (SDRAM_BANK_ADDR + 2*counter) = (uint16_t)0x00;
|
||
}
|
||
|
||
/* 向整个SDRAM写入数据 16位 */
|
||
for (counter = 0; counter < SDRAM_SIZE/2; counter++)
|
||
{
|
||
*(__IO uint16_t*) (SDRAM_BANK_ADDR + 2*counter) = (uint16_t)(uhWritedata_16b + counter);
|
||
}
|
||
|
||
/* 读取 SDRAM 数据并检测*/
|
||
for(counter = 0; counter<SDRAM_SIZE/2;counter++ )
|
||
{
|
||
uhReaddata_16b = *(__IO uint16_t*)(SDRAM_BANK_ADDR + 2*counter); //从该地址读出数据
|
||
|
||
if(uhReaddata_16b != (uint16_t)(uhWritedata_16b + counter)) //检测数据，若不相等，跳出函数,返回检测失败结果。
|
||
{
|
||
SDRAM_ERROR("16位数据读写错误！出错位置：%d",counter);
|
||
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
|
||
SDRAM_INFO("SDRAM读写测试正常！");
|
||
/*检测正常，return 1 */
|
||
return 1;
|
||
|
||
|
||
}
|
||
|
||
|
||
/*********************************************END OF FILE**********************/
|
||
|