How to use inbuilt ADC of LPC2148
While dealing with controllers we are dealing with digital signals but real world is analog. In real world all natural quantities like temperature, pressure, light intensity etc. are analog. If we have to deal with such quantities using embedded systems, we have to convert these analog quantities which can be understood and proceed by digital signal. Devices used for this purpose is known as ADC. Special ICs such as ADC0804, ADC0808, ADC0809, Serial ADC MAX1112 etc. are handy for this. Nowadays, many controllers are having inbuilt ADC. LPC2148 of ARM7 family is one of the widely used controller and it also has multichannel ADC inbuilt. In this article, we will understand how to use inbuilt ADC of LPC2148.