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器件型号：AM6442 您好！
我们有一款带有 AM6442.A PSRAM (MRAM)的定制电路板、通过16位 GPMC 异步非多路复用数据/地址连接。
我根据代码部分基于 AM26xx PSRAM GPMC 示例、部分基于 AM64xx NAND 闪存示例。
很遗憾、当尝试从 PSRAM 中读取时、我收到数据中止错误。 对于我的生命,我不知道这个问题。
我收到同步外部中止： 
而 GPMC 的 ERRORNOTSUPPADD 错误：
我假设 BASEADDRESS 配置错误、但这是由 GPMC 驱动程序"自动"完成的：
下面是我的代码片段：
/* GPMC attributes */
static GPMC_HwAttrs gGpmcAttrs[CONFIG_GPMC_NUM_INSTANCES] =
{
{
.gpmcBaseAddr = CSL_GPMC0_CFG_BASE,
.dataBaseAddr = CSL_GPMC0_DATA_BASE,
.inputClkFreq = 133333333U,
.intrNum = CSLR_R5FSS0_CORE0_INTR_GPMC0_GPMC_SINTERRUPT_0,
.intrPriority = 4U,
.chipSelBaseAddr = CSL_GPMC0_DATA_BASE,
.chipSelAddrSize = GPMC_CS_MASK_ADDR_SIZE_16MB,
.clkDivider = CSL_GPMC_CONFIG1_GPMCFCLKDIVIDER_DIVBY4,
.waitPinNum = CSL_GPMC_CONFIG1_WAITPINSELECT_W0,
.addrDataMux = CSL_GPMC_CONFIG1_MUXADDDATA_NONMUX,
.timeLatency = CSL_GPMC_CONFIG1_TIMEPARAGRANULARITY_X1,
.waitPinPol = CSL_GPMC_CONFIG_WAIT0PINPOLARITY_W0ACTIVEL,
.timingParams =
{
.csOnTime = GPMC_PSRAM_CS_ON_TIME,
.csRdOffTime = GPMC_PSRAM_CS_RD_OFF_TIME,
.csWrOffTime = GPMC_PSRAM_CS_WR_OFF_TIME,
.advOnTime = GPMC_PSRAM_ADV_ON_TIME,
.advRdOffTime = GPMC_PSRAM_ADV_RD_OFF_TIME,
.advWrOffTime = GPMC_PSRAM_ADV_WR_OFF_TIME,
.advAadMuxOnTime = GPMC_PSRAM_ADV_AADMUX_ON_TIME,
.advAadMuxRdOffTime = GPMC_PSRAM_ADV_AADMUX_RD_OFF_TIME,
.advAadMuxWrOffTime = GPMC_PSRAM_ADV_AADMUX_WR_OFF_TIME,
.weOnTtime = GPMC_PSRAM_WE_ON_TIME,
.weOffTime = GPMC_PSRAM_WE_OFF_TIME,
.oeOnTime = GPMC_PSRAM_OE_ON_TIME,
.oeOffTime = GPMC_PSRAM_OE_OFF_TIME,
.oeAadMuxOnTime = GPMC_PSRAM_OE_AADMUX_ON_TIME,
.oeAadMuxOffTime = GPMC_PSRAM_OE_AADMUX_OFF_TIME,
.pageBurstAccess = GPMC_PSRAM_PAGEBURST_ACCESS_TIME,
.rdAccessTime = GPMC_PSRAM_RD_ACCESS_TIME,
.wrAcessTime = GPMC_PSRAM_WR_ACCESS_TIME,
.rdCycleTime = GPMC_PSRAM_RD_CYCLE_TIME,
.wrCycleTime = GPMC_PSRAM_WR_CYCLE_TIME,
.wrDataOnMuxBusTime = GPMC_PSRAM_ADMUX_DATA_VALID,
.cycle2CycleDelay = GPMC_PSRAM_C2C_DELAY,
.cycleDelaySameChipSel = CSL_GPMC_CONFIG6_CYCLE2CYCLESAMECSEN_NOC2CDELAY,
.cycleDelayDiffChipSel = CSL_GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN_NOC2CDELAY,
.busTurnAroundTime = GPMC_PSRAM_BRST_TAROUND_TIME,
},
.readType = CSL_GPMC_CONFIG1_READTYPE_RDASYNC,
.csExDelay = CSL_GPMC_CONFIG2_CSEXTRADELAY_NOTDELAYED,
.accessType = CSL_GPMC_CONFIG1_READMULTIPLE_RDSINGLE,
},
};
/* GPMC Driver Parameters */
GPMC_Params gGpmcParams[CONFIG_GPMC_NUM_INSTANCES] =
{
{
.gpmcDmaChIndex = -1,
.devType = CSL_GPMC_CONFIG1_DEVICETYPE_NORLIKE,
.devSize = CSL_GPMC_CONFIG1_DEVICESIZE_SIXTEENBITS,
.chipSel = GPMC_CHIP_SELECT_CS0,
.intrEnable = FALSE,
.dmaEnable = FALSE,
.transferMode = GPMC_TRANSFER_MODE_BLOCKING,
.transferCallBckFunc = NULL,
.memDevice = GPMC_MEM_TYPE_PSRAM,
},
};
int32_t mram_gpmcRead (uint32_t offset, uint8_t *buf, uint32_t len)
{
int32_t status = SystemP_SUCCESS;
uint32_t size = len;
/*if(offset + len > config->attrs->psramSize)
{
status = SystemP_FAILURE;
}*/
uint32_t baseAddress = GPMC_DATA_BASE_ADDRESS;
volatile uint16_t *pSrc = (volatile uint16_t *)(offset+baseAddress);
volatile uint16_t *pDst = (volatile uint16_t *)buf;
uint32_t remain = size & 0x1;
if (remain != 0U)
{
size = size - remain + 2U;
}
while (size != 0U)
{
*pDst = *pSrc;
pSrc++;
pDst++;
size -= 2U;
}
return status;
}
我非常感谢您的支持。
您好
斯特凡
