Skip to content

Latest commit

 

History

History
172 lines (148 loc) · 8.09 KB

README.md

File metadata and controls

172 lines (148 loc) · 8.09 KB
Raw

dsPIC33CH Curiosity demos

Various demo projects for dsPIC33CH Curiosity board

Hardware Requirements:

Software Requirements:

For Demos with UART you additionally need:

Curiosity board Notes

Please note that when you create new project you need to select:

  • Family: 16-bit DSCs (dsPIC33)
  • Device: dsPIC33CH512MP508 for Master Core. If you will create also Slave project you have to select same CPU with S1 (Slave) suffix
  • Tool: Starter Kits (PKOB)-SN:BURxxx (you need to have your Curiosity board

Here is brief overview of I/O peripherals on Curiosity board - excluding DC/DC converter parts:

Peripheral dsPIC33CH pin and/or port
S1 push-button RE7
S2 push-button RE8
S3 push-button RE9
S4 push-button /MCLR (reset)
R/G/B LED RB14/RD7/RD5
LED1 red RE0
LED2 red RE1
10kOhm pot RA0

NOTE: To Debug Master core on Curiosity board (with on-board Programmer/Debugger) you have to make following adjustment in MCC Tool:

  • System Module -> Easy Setup -> ICD -> Communicate on PGC2 and PGD2

Project list

NOTE: dsPIC33CH has actually two kinds of PWM:

  1. High-Speed (HS) PWM (special module available on selected PICs only)
  2. SCCP PWM (common module available on most PICs)

List of dsPIC33CH/Curiosity projects:

  • RGB_SW.X/ - RGB LED switches demo - press S1, S2, S3 to turn on RGB LED - RED, GREEN or BLUE channel. Additionally LED1 and LED2 are blinking to show that program is alive. Uses Master core only.
    • used components:
      • TMR1 (Timer1 module), period 250 ms - for blinking LED1 and LED2 - complementary
      • 3 GPIO Inputs: S1, S2, S3 (on-board switches)
      • 5 GPIO Outputs: LED1, LED2, RGB LED
  • ADC_PWM.X
    • HS PWM example
    • ADC + PWM Example: read potentiometer value using ADC and set RGB LED (Blue) brightness using PWM
    • additionally LED1 & LED2 are synchronously blinking each second using TMR1 to show that board is alive
    • used components
      • TMR1 (Timer1 module), period 250 ms - for blinking LED1 and LED2 - in sync
      • ADC1 Input - to read Potentiometer value
      • PWM1 Output to RB14 Blue LED (and RB15 but that is unused)
      • UART1 Output to PC, 9600Baud, 8-bit,1-stop, no-parity
    • inputs:
      • potentiometer - value read via ADC and used for PWM duty cycle
    • outputs:
      • RGB LED, Blue channel - brightness via PWM, driven by potentiometer
      • dump current ADC and PWM values on UART every second
        • use 9600 Baud, 8-bit, 1 stop-bit, no-parity, no flow control on your terminal (for example Putty)
    • resources:
  • RGB-PWM-MS/RGB_PWM.X
    • HS PWM example
    • control all 3 RGB channels of RGB LED using PWMs, duty adjustable by S1, S2, S3
    • also show state of S1, S2, S3 on LED1 and LED2 (where S2 lights both LED1 and LED2)
    • we have to use both cores because:
      • HR PWM pins are not remapable: https://www.microchip.com/forums/m1186202.aspx
      • RGB LED, BLUE Channel, pin RP46/PWM1H/RB14 - PWM usable from Master
      • RGB LED, GREEN Channel, pin S1RP71/S1PWM8H/S1RD7 - PWM usable from Slave only
      • RGB LED, RED Channel, pin S1RP69/S1PWM6L/S1RD5 - PWM usable from Slave only, also notice that RED Channel is connected to PWM LOW pin, so other PWM registers are needed.
    • how to use: press S1 to increase RED brightness, S2 to increase GREEN brightness and S3 to increase BLUE brightness. It will wrap on overflow. Please be aware that LEDs are non-linear semiconductors so the brigthness has logarithm like curve (very sensitive to low values change and insesitive to high values change).
  • CCP_PWM_LEDs.X/
    • SCCP PWM example:
    • control RGB LED using Potentiometer
    • used components
      • ADC1 Input - to read Potentiometer value
      • SCCP1-PWM SCCP module to drive Red channel of RGB LED
      • SCCP2-PWM SCCP module to drive Green channel of RGB LED
      • SCCP3-PWM SCCP module to drive Blue channel of RGB LED
      • 3 GPIO Inputs: S1, S2, S3 (on-board switches)
      • 5 GPIO Outputs: LED1, LED2, RGB LED
    • how to use:
      1. press and release one of those selection buttons
        • S1 to select RED channel (LED1 will be on)
        • or S2 to select GREEN channel (LED1 and LED2 will be on)
        • or S3 to select BLUE channel (LED2 will be on)
      2. use Potentiometer to adjust brightness of selected RGB LED channel

Notes

Installing MCC in air-gapped environment

I simply had no luck with MPLAB X IDE v5.50 + MCC 5.0.x:

  • it seems that MCC Content Selector simply fails to work without Internet access...

You can also download latest library list using:

curl -fL -o mcc_libraries.xml https://www.microchip.com/mcc_libraries_xml

And that way you can get working links to download mc3lib files (unlike Download archive page)

Finally I found that older version works in air-gapped environment:

Installing under openSUSE LEAP 15.4

I installed those packages

# XFCE4 environment
sudo zypper in -t pattern xfce
# X11 Login manager
sudo zypper in lightdm
# These packages are required by MPLAB X IDE v5.50
# to avoid several IDE crashes:
sudo zypper in libgthread-2_0-0 libXss1