下面是我内存映射代码，从0x90000000顺序读取，数据就是对的，从0x90001000读取就全是FF，跟MPU无关
uint32_t QSPI_EnableMemoryMappedMode()
{
QSPI_CommandTypeDef s_command;
QSPI_MemoryMappedTypeDef s_mem_mapped_cfg;
/* Configure the command for the read instruction */
s_command.InstructionMode = QSPI_INSTRUCTION_1_LINE;
s_command.Instruction = Fast_Read_Quad;
s_command.AddressMode = QSPI_ADDRESS_4_LINES;
s_command.AddressSize = QSPI_ADDRESS_24_BITS;
s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
s_command.DataMode = QSPI_DATA_4_LINES;
s_command.DummyCycles = 26;
s_command.DdrMode = QSPI_DDR_MODE_DISABLE;
s_command.DdrHoldHalfCycle = QSPI_DDR_HHC_HALF_CLK_DELAY;
s_command.SIOOMode = QSPI_SIOO_INST_EVERY_CMD;
s_command.Address = 0;
s_command.NbData = 1;
/* Configure the memory mapped mode */
s_mem_mapped_cfg.TimeOutActivation = QSPI_TIMEOUT_COUNTER_DISABLE;
s_mem_mapped_cfg.TimeOutPeriod = 0;
return HAL_QSPI_MemoryMapped(&hqspi, &s_command, &s_mem_mapped_cfg);
}
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