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你好：<br /> 我也发现了这个问题，我用的是2G的金士顿的，由于不同的SD卡读写速度是有区别的，其SPI操作时序上有点区别，在ZLG提供的SPI+SD和u/cos+SPI+SD都存在这个问题，我修改了其中的两个地方，就好了，你仔细看看：<br />没有操作系统的地方：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<20;fengwei_count++ ) //FENGWEI <br /> ;<br /> ret = SD_ReadOCR(4, recbuf); /* 7. 读OCR寄存器,查询卡支持的电压值 read OCR register,get the supported voltage */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> if ((recbuf[2] & MSK_OCR_33) != MSK_OCR_33)<br /> { <br /> ret = SD_ERR_VOL_NOTSUSP; /* 不支持3.3V,返回错误码 not support 3.3V,return error code */<br /> goto SD_ERR;<br /> }<br /> <br /> SPI_ClkToMax(); /* 8. 设置SPI时钟到最大值 set SPI clock to maximum */<br />而在u/cos+spi+sd中修改如下：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> INT32U i = 100,j = 0;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> do<br /> {<br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if(ret == SD_NO_ERR)<br /> break;<br /> j++;<br /> for(i=100; i>0; i--);<br /> }while(j<10);<br /><br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<50;fengwei_count++ ) //FENGWEI 你好：<br /> 我也发现了这个问题，我用的是2G的金士顿的，由于不同的SD卡读写速度是有区别的，其SPI操作时序上有点区别，在ZLG提供的SPI+SD和u/cos+SPI+SD都存在这个问题，我修改了其中的两个地方，就好了，你仔细看看：<br />没有操作系统的地方：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<20;fengwei_count++ ) //FENGWEI <br /> ;<br /> ret = SD_ReadOCR(4, recbuf); /* 7. 读OCR寄存器,查询卡支持的电压值 read OCR register,get the supported voltage */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> if ((recbuf[2] & MSK_OCR_33) != MSK_OCR_33)<br /> { <br /> ret = SD_ERR_VOL_NOTSUSP; /* 不支持3.3V,返回错误码 not support 3.3V,return error code */<br /> goto SD_ERR;<br /> }<br /> <br /> SPI_ClkToMax(); /* 8. 设置SPI时钟到最大值 set SPI clock to maximum */<br />而在u/cos+spi+sd中修改如下：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> INT32U i = 100,j = 0;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> do<br /> {<br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if(ret == SD_NO_ERR)<br /> break;<br /> j++;<br /> for(i=100; i>0; i--);<br /> }while(j<10);<br /><br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<50;fengwei_count++ ) //FENGWEI 你好：<br /> 我也发现了这个问题，我用的是2G的金士顿的，由于不同的SD卡读写速度是有区别的，其SPI操作时序上有点区别，在ZLG提供的SPI+SD和u/cos+SPI+SD都存在这个问题，我修改了其中的两个地方，就好了，你仔细看看：<br />没有操作系统的地方：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<20;fengwei_count++ ) //FENGWEI <br /> ;<br /> ret = SD_ReadOCR(4, recbuf); /* 7. 读OCR寄存器,查询卡支持的电压值 read OCR register,get the supported voltage */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> if ((recbuf[2] & MSK_OCR_33) != MSK_OCR_33)<br /> { <br /> ret = SD_ERR_VOL_NOTSUSP; /* 不支持3.3V,返回错误码 not support 3.3V,return error code */<br /> goto SD_ERR;<br /> }<br /> <br /> SPI_ClkToMax(); /* 8. 设置SPI时钟到最大值 set SPI clock to maximum */<br />而在u/cos+spi+sd中修改如下：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> INT32U i = 100,j = 0;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> do<br /> {<br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if(ret == SD_NO_ERR)<br /> break;<br /> j++;<br /> for(i=100; i>0; i--);<br /> }while(j<10);<br /><br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<50;fengwei_count++ ) //FENGWEI 你好：<br /> 我也发现了这个问题，我用的是2G的金士顿的，由于不同的SD卡读写速度是有区别的，其SPI操作时序上有点区别，在ZLG提供的SPI+SD和u/cos+SPI+SD都存在这个问题，我修改了其中的两个地方，就好了，你仔细看看：<br />没有操作系统的地方：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<20;fengwei_count++ ) //FENGWEI <br /> ;<br /> ret = SD_ReadOCR(4, recbuf); /* 7. 读OCR寄存器,查询卡支持的电压值 read OCR register,get the supported voltage */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> if ((recbuf[2] & MSK_OCR_33) != MSK_OCR_33)<br /> { <br /> ret = SD_ERR_VOL_NOTSUSP; /* 不支持3.3V,返回错误码 not support 3.3V,return error code */<br /> goto SD_ERR;<br /> }<br /> <br /> SPI_ClkToMax(); /* 8. 设置SPI时钟到最大值 set SPI clock to maximum */<br />而在u/cos+spi+sd中修改如下：<br />INT8U SD_Initialize(void)<br />{<br /> INT8U recbuf[4],ret,fengwei_count;<br /> INT32U i = 100,j = 0;<br /> <br />#if SD_UCOSII_EN<br /> if (pSemSD == NULL)<br /> {<br /> pSemSD = OSSemCreate(1); /* 创建访问SD/MMC卡信号量 create SD/MMC semaphore */ <br /> if (pSemSD == NULL) <br /> return SD_ERR_CREATE_SEMSD;<br /> } <br />#endif <br /> <br /> SD_StartSD();<br /> SD_HardWareInit(); /* 初始化读写SD卡的硬件条件 Initialize the hardware that access SD Card */<br /> <br /> if (SD_ChkCard() != 1) /* 检查卡是否插入 check weather card is inserted */<br /> {<br /> ret = SD_ERR_NO_CARD; <br /> goto SD_ERR;<br /> }<br /> <br /> SPI_CS_Assert(); /* 1. 置CS为低 assert CS */ <br /> SD_SPIDelay(100); /* 2. 至少延时 74 clock delay more than 74 clock */<br /> SPI_CS_Deassert(); /* 3. 置CS为高 dessert CS */<br /> SD_SPIDelay(10); /* 4. 延时2(8 clock) delay 2(8 clock) */<br /> <br /> do<br /> {<br /> ret = SD_ResetSD(); /* 5. 发出CMDO命令复位SD卡 send CMD0 command to reset sd card */<br /> if(ret == SD_NO_ERR)<br /> break;<br /> j++;<br /> for(i=100; i>0; i--);<br /> }while(j<10);<br /><br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR; <br /> <br /> ret = SD_ActiveInit(); /* 6. 激活卡进入初始化过程. active card initialize process */<br /> if (ret != SD_NO_ERR)<br /> goto SD_ERR;<br /> <br /> for( fengwei_count=0;fengwei_count<50;fengwei_count++ ) //FENGWEI
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