CC3200 and MSP432: Pervasive Display e-Paper BoosterPack

[rei-vilo]

The Pervasive Display e-Paper BoosterPack is based on e-ink and only requires power during the update. Perfect for ultra-low cost solutions with the MSP432!

Latest version v.231 no longer requires a PWM input, contrary to previous release v.110.

The updated code is available at rei-vilo / gratis / CC3200 and MSP432.

It works fine on MSP430F5529, LM4F120, TM4C123 but fails on MSP432 and CC3200.

• MSP432 (EMT): no update of the screen
• CC3200 (EMT and non-EMT): only first update works but fails after.

My update 2015-08-01 fixed pins numbers and solved conflict of variable names.

• Added #include Energia.h
• For Energia, changed pin names to pin numbers (pin names are deprecated)
• Changed CS for EPD_FLASH_CS to avoid conflicts with Energia
• Works on MSP430F5529, LM4F120, TM4C123
• Fails on MSP432 and CC3200
• Recognise the FPL material type by the rear labels
• Use branch rei-vilo / gratis / CC3200 and MSP432

I've also opened a ticket at https://github.com/repaper/gratis/issues/26

[rei-vilo]

There seems to be a problem with GPIO when using SPI on the MSP432 that recents from using the EPD BoosterPack.

• Mentioned at Provide Implementation for CC3200 and MSP432 LaunchPads on Energia #26 on the repaper/gratis repository.
• Specific ticket MSP432: GPIO Issue When Using SPI #722

[rei-vilo]

Here are the last results with film v231 and Energia 17:

• Works on MSP430F5529 and CC3200 non-EMT
• Fails on CC3200 EMT and MSP432 EMT

[rei-vilo]

CC3200 and CC3200 EMT

I managed to get it work on CC3200 EMT, after fixing

• the #822 CC3200: Inconsistent Resolutions Between Non-EMT and EMT with this modification on S5813A.cpp.

long S5813A_Class::readVoltage(void) {
    long vADC = analogRead(this->temperature_pin);

// Added for CC3200 EMT    
#if defined(ENERGIA_MT)
#if defined(__CC3200R1M1RGC__) || defined(__CC3200R1MXRGCR__)
    vADC *= 4;
#endif
#endif
// End
/*
    Serial.print("analogRead=");
    Serial.print(vADC);
    Serial.print("\treadVoltage=");
    Serial.println(REV_PD((vADC * ADC_MAXIMUM_mV) / ADC_COUNTS));
 */
    return REV_PD((vADC * ADC_MAXIMUM_mV) / ADC_COUNTS);
}

• and adding a dummy SPI.begin() on EPD_V231_G2.cpp. This is required on CC3200, CC3200 EMT, MSP432.

static void SPI_on(void) {

    // Energia EMT freezes on SPI.end() if no previous SPI.begin()
    // Dummy SPI.begin()
    SPI.begin();

    SPI.end();
    SPI.begin();
    SPI.setBitOrder(MSBFIRST);
...

MSP432 EMT

Still no luck on the MSP432.

Temperature = 19 Celsius dc_state = 0x0 EPD: DC failed

I'm going to test mode 3.

[rei-vilo]

SPI mode 3 is indeed activated in MSP432. Still no display.

Demo version: 5 Display size: EPD_2_7 Film: V231 COG: G2

Image 1: text_image_2_7.xbm Image 2: cat_2_7.xbm

unsupported EPD FLASH chip: MFG: 0x84 device: 0x80A6 Temperature = 18 Celsius EPD: DC failed

[yeshymanoharan]

are there any solutions for this? I have tried to get the display working with the MSP432 and it fails on the EPD_display_init function with the EPD_initialize_gpio line.