使用的型号是 MSP430F2616
DAC初始化时，校准一直不能通过。代码如下：
DAC12_0CTL_bit.DAC12ENC = 0u; // DAC12 is disabled
DAC12_1CTL_bit.DAC12ENC = 0u; // DAC12 is disabled
// Reset the control registers to thier default power-up states.
DAC12_0CTL = 0x0000u;
DAC12_1CTL = 0x0000u;
DAC12_1CTL_bit.DAC12OPS = 0u; // outputs: DAC0 = P6.6, DAC1 = P6.7
DAC12_1CTL_bit.DAC12SREFx = 2u; // DAC reference = eVref+
DAC12_1CTL_bit.DAC12RES = 0u; // 12-bit resolution
DAC12_1CTL_bit.DAC12LSELx = 0u; // DAC12 values loaded immediately
DAC12_1CTL_bit.DAC12IR = 1u; // DAC output at 1X reference input
DAC12_1CTL_bit.DAC12AMPx = 7u; // In/out buffers = high speed/current
DAC12_1CTL_bit.DAC12DF = 0u; // staright binary data (0 to 0xFFFF)
DAC12_1CTL_bit.DAC12IE = 0u; // DAC12 interrupts disabled
DAC12_1CTL_bit.DAC12IFG = 0u; // clear any existing flags
DAC12_1CTL_bit.DAC12GRP = 0u; // DAC outputs are not grouped
DAC12_1DAT = 0u; // Set initial output = 0V
DAC12_1CTL_bit.DAC12ENC = 1u; // DAC12 is enabled
DAC12_1CTL_bit.DAC12CALON = 1u; // Initiate DAC12 Calibration
// Wait for calibration complete. bit will automatically reset
do {TEST_HARNESS_TICK;} while(1u == DAC12_1CTL_bit.DAC12CALON);
请问这应该是什么问题，是DA的输出引脚电压一致有波动导致有问题吗？或者有什么定位的。
