Independent modes

AN3116

6/18

Doc ID 16840 Rev 1

Figure 3.

Multichannel, single conversion mode

1.2.2

Example of application

This mode can be used when starting a system depends on some parameters like knowing

the coordinates of the arm’s tip in a manipulator arm system. In this case, you have to read

the position of each articulation in the manipulator arm system at power-on to determine the

coordinates of the arm’s tip.

This mode can also be used to make single measurements of multiple signal levels (voltage,

pressure, temperature, etc.) to decide if the system can be started or not in order to protect

the people and equipment.

It can likewise be used to convert signals coming from strain gauges to determine the

directions and values of the different strains and deformations of an object.

1.3

Single-channel continuous conversion mode

1.3.1

Description

The single-channel continuous conversion mode converts a single channel continuously

and indefinitely in regular channel conversion.

The continuous mode feature allows the ADC to work in the background. The ADC converts

the channels continuously without any intervention from the CPU. Additionally, the DMA can

be used in circular mode, thus reducing the CPU load.

Note:

An example of firmware is provided with this application note: SingleChannelContinuous.

The example uses two methods: DMA and interrupts. To select either method, simply

comment or uncomment #define USE_DMA_Transfer in the main.c file.

Figure 4.

Single-channel, continuous conversion mode