Difference between revisions of "LPC1768: DAC Programming"
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|AD3|| P0.26 || 0-GPIO, 1-<b>AD0[3]</b>, 2-AOUT, 3-RXD3 ||20,21 bits of PINSEL1 | |AD3|| P0.26 || 0-GPIO, 1-<b>AD0[3]</b>, 2-AOUT, 3-RXD3 ||20,21 bits of PINSEL1 | ||
| − | |} | + | |} |
| − | $$Output voltage of DAC = (Vref * InputValue)/MAX_VALUE = (3.3 * InputValue)/1023 = InputValue * 3.22 mv. | + | $$Output voltage of DAC = (Vref * InputValue)/MAX_VALUE = (3.3 * InputValue)/1023 = InputValue * 3.22 mv.$$ |
<br><br><br><br> | <br><br><br><br> | ||
Revision as of 18:13, 21 April 2016
Objective
In this tutorial we are going to discuss how to use the inbuilt LPC1768 DAC.
Finally we will see how to use the ExploreEmbedded DAC libraries.
LPC7168 DAC Module
Lpc1768 has in built DAC with following features.
- 10-bit digital to analog converter
- Resistor string architecture
- Buffered output
- Power-down mode
- Selectable speed vs. power
- Maximum update rate of 1 MHz.
| Adc Channel | Port Pin | Pin Functions | Associated PINSEL Register |
|---|---|---|---|
| AD3 | P0.26 | 0-GPIO, 1-AD0[3], 2-AOUT, 3-RXD3 | 20,21 bits of PINSEL1 |
$$Output voltage of DAC = (Vref * InputValue)/MAX_VALUE = (3.3 * InputValue)/1023 = InputValue * 3.22 mv.$$
DAC Registers
Steps
Code