SLAU857A May   2021  – July 2021 MSP430FR2476 , MSP430FR2512 , MSP430FR2522 , MSP430FR2532 , MSP430FR2533 , MSP430FR2632 , MSP430FR2633 , MSP430FR2672 , MSP430FR2673 , MSP430FR2675 , MSP430FR2676

 

  1.   1
  2.   2
    1.     3
    2.     4
  3.   5
    1.     6
    2.     7
    3.     8
  4.   9
    1.     10
      1.      11
      2.      12
      3.      13
    2.     14
    3.     15
  5.   16
    1.     17
      1.      18
      2.      19
        1.       20
        2.       21
        3.       22
      3.      23
    2.     24
      1.      25
      2.      26
  6.   27
    1.     28
      1.      29
      2.      30
      3.      31
      4.      32
      5.      33
    2.     34
      1.      35
      2.      36
      3.      37
    3.     38
    4.     39
      1.      40
      2.      41
      3.      42
      4.      43
      5.      44
    5.     45
    6.     46
      1.      47
      2.      48
      3.      49
      4.      50
      5.      51
  7.   52
    1.     53
    2.     54
    3.     55
    4.     56
    5.     57
  8.   58
  9.   59

5.6.1 Program Structure

Figure 5-14 shows the composition of the program. For more related instructions, refer to Starting from Scratch with the Starter Project.

GUID-20210517-CA0I-DTCF-QDFJ-P9606MTNMPJX-low.png Figure 5-14 Demo Program Folder Structure

The directory structure of the software project is shown on the left side of Figure 5-14. The folders or files involved in this part are shown in Table 5-9. Among them, the most core for users is the CapTIvate_config folder. As shown in Figure 5-15, the corresponding relationship between the GUI and the parameters in CapTIvate_config can be clicked on the corresponding parameter in the GUI and read "Affected Software Parameters" for understanding.

GUID-20210517-CA0I-SS9P-PH8F-VBCCQGMVXNBP-low.png Figure 5-15 Correspondence Between GUI and Code Parameters
Table 5-9 Tools for Software Development
Number Contents Comment
1 CapTIvate Low-level driver library for capacitive touch-related peripherals, including capacitance detection and communication configuration.
2 CapTIvate_app The top-level logic code of capacitive touch, including system initialization, scanning and calibration logic.
3 CapTIvate_config Configuration parameters generated by the GUI.
4 driverlib MSP430 peripheral driver library.
5 mathlib Fixed-point calculation library.
6 targetConfigs MCU model selection and programming configuration (no need to change).
7 lnk_msp430fRxxxx.cmd Linker command file, which gives the settings of program space and data space.
8 main.c Main function

The program structure of the main function is shown on the right side of Figure 5-14, and the function functions involved in this part are shown in Table 5-10. For more function descriptions, refer to the API Guide.

Table 5-10 Important Functions
Number Contents Comment
1 WDTCTL = WDTPW | WDTHOLD Ban watchdog.
2 BSP_configureMCU() Configure the communication IO pin, configure the clock.
3 __bis_SR_register(GIE) Enable global interrupt.
4 CAPT_appStart() Capacitive touch module initialization and calibration, while enabling communication peripherals.
5 CAPT_appHandler() Capacitive touch scanning and mode switching.
6 __no_operation() CPU waits for one cycle.
7 CAPT_appSleep() CPU enters sleep, waiting for periodic interrupt to wake up.
8 CAPT_initUI() Capacitive touch module initialization, and enable communication peripherals.
9 CAPT_calibrateUI() Capacitive touch module calibration.
10 CAPT_updateUI() Update the parameters of all sensors.
11 I2CSlave_setRequestFlag() Used to generate high-level pulses when touched to remind the host computer of touch events.