LPC54608的ADC阈值触发中断

缘来有你

近期在研究ADC中断时，发现LPC54608中，有阈值比较功能，按照数据手册上的说明，阈值中断能够触发DMA，但是在验证该功能时，
阈值中断处理函数能够正常执行，但是DMA一直触发不了，请教各位大神，有没有遇到过这种情况。

44.6.10 ADC Interrupt Enable register
There are four separate interrupt requests generated by the ADC: conversion, these are
-complete or sequence-complete interrupts for each of the two sequences, a
threshold-comparison out-of-range interrupt, and a data overrun interrupt. The two
conversion/sequence-complete interrupts can also serve as DMA triggers. The threshold
and data overrun interrupts share a slot in the NVIC.
These interrupts may be combined into one request on some chips if there is a limited
number of interrupt slots. This register contains the interrupt-enable bits for each interrupt.
In this register, threshold events selected in the ADCMPINTENn bits are described as
follows:
• Disabled: Threshold comparisons on channel n will not generate an ADC
threshold-compare interrupt/DMA trigger.
• Outside threshold: A conversion result on channel n which is outside the range
specified by the designated HIGH and LOW threshold registers will set the channel n
THCMP flag in the FLAGS register and generate an ADC threshold-compare
interrupt/DMA trigger.
• Crossing threshold: Detection of a threshold crossing on channel n will set the
channel n THCMP flag in the FLAGS register and generate an ADC
threshold-compare interrupt/DMA trigger.

最佳答案

ADC 中断可以作为DMA的硬件触发源 [attach]450461[/attach]

• 小恩GG
• 发表于2018-11-28
• 详细答案>>

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小恩GG

ADC 中断可以作为DMA的硬件触发源

缘来有你

小恩GG 发表于 2018-11-28 10:00
ADC 中断可以作为DMA的硬件触发源

您好，我试了一下，ADC的确能够触发DMA，但只是sequence-complete interrupts能触发DMA，阈值中断一直触发不了
The two conversion/sequence-complete interrupts can also serve as DMA triggers. The threshold
and data overrun interrupts share a slot in the NVIC.
请问一下，是不是只有conversion/sequence-complete interrupts才能触发DMA？

小恩GG

缘来有你 发表于 2018-11-28 10:11
您好，我试了一下，ADC的确能够触发DMA，但只是sequence-complete interrupts能触发DMA，阈值中断一直触 ...

是的

缘来有你

小恩GG 发表于 2018-11-28 10:14
是的

我知道了，谢谢