LPC546xx ADC burst mode

karimboallal — Tue, 06 Nov 2018 11:20:47 GMT

I'm using an LPC54606 and I would like to use a channel (n°3) of the ADC to generate an interrupt when it is under a threshold. I need that the ADC is "continuously and automaticaly" on working so it seem that this correspond to the "burst mode".

So I'm trying to do that but without success, I have configured the "THR0_LOW" register with the threshold. I have configured "THR0_HIGH" with the maximum value. I have configured "INTEN" register with '0b01' in ADCMPINTEN3 to generate an interruption when the level is outside threshold.

Finaly I have configured the "SEQA_CTRL" register with just the cahnnel 3 enabled, writed a '1' in burst bit (b27), a '1' in mode bit (b30) and a '1' in SEQA_ENA.

After that I have enabled in the NVIC_IRQ the "ADC0_THCMP_IRQn". And an interruption is immediatly generated even thougth the "FLAGS" register is '0' and the "DAT[3]" is upper the threshold.

What is wrong in my configuration?

I feel that after that the ADC is not on working even though the burst bit is '1'.

Someone can help me please?

Thanks.

K.B

topic LPC546xx ADC burst mode in LPC Microcontrollers

LPC546xx ADC burst mode