Part Number: MSP432P401R
I am using a MSP432P401R Red Launchpad. I am trying to interface an LM35 temperature sensor with the controller and display the same over a K350 QVGA display. The LM35 is interfaced at P5.5 with ADC MEM15.
The issue I am facing is that the microcontroller is unable to show the proper room temperature. The program I have writtten is working as desired sinceif the adc is fed with onboard 3.3 V supply, it shows 3300mV as output on the display. But on interfacing the same with LM35 gives weird output which is much higher or lower with respect to room temperature. Inorder to verify if the LM35 is working fine, I measured the output signal with DMM and it was showing 310 mV which is same to room temperature. But on interfacing it with msp432, the DMM reading keeps fluctuating around 160 mV and higher. Also an important thing i noticed is that when i measured the voltage at ADC channel i.e. P5.5, DMM gives reading of around 80mV and I guess its much greater that it should be.
In reply to Keith Barkley:
In reply to Amit Kotal:
In reply to Chris Sterzik:
Indeed the issue was with the port pins of the LaunchPad.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.