关于MSP430FR4133写FRAM的怪问题?

2019-03-24 08:41发布

站内问答 / TI MCU
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当执行FRAMWrite_uint64((uint64_t *)FRAM_RECORD_ADDRESS,0); 时，后20*4会被修改为0
原来0xffffffff,0xffffffff,被改为0x0000ffff,0x00000000

当执行FRAMWrite_Long((uint32_t *)FRAM_RECORD_ADDRESS, 0);时，后10*4=40会被修改为0
原来0xffffffff,被改为0x0000ffff,

void FRAMWrite_uint64(uint64_t *pFRAM_write_ptr, uint64_t ui64data)
{
        SYSCFG0 &= ~DFWP;
        *pFRAM_write_ptr = ui64data;
        SYSCFG0 |= DFWP;
}

void FRAMWrite_Long(uint32_t *pFRAM_write_ptr, uint32_t ui32data)
{
        SYSCFG0 &= ~DFWP;
        *pFRAM_write_ptr = ui32data;
        SYSCFG0 |= DFWP;
}

#define FRAM_RECORD_ADDRESS  0x1812


FRAMWrite_uint64((uint64_t *)FRAM_RECORD_ADDRESS,0);
FRAMWrite_Long((uint32_t *)FRAM_RECORD_ADDRESS, 0);
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yl20084784
2019-03-24 15:05
< 本帖最后由 yl20084784 于 2017-1-4 21:26 编辑

FRAM好像可以提供8位16位写入，64位有问题
FRAM
The FRAM can be programmed via the JTAG port, Spy-Bi-Wire (SBW), the BSL, or in-system by the CPU.
Features of the FRAM include:
• Ultra-low-power ultra-fast-write nonvolatile memory
• Byte and word access capability
• Programmable and automated wait-state generation
• Error correction coding (ECC)

这里没说可以按64位来，所以，你要手动把他拆分成两个word来写就对了

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