Commit 6e6bb662 authored by Daniel Friesel's avatar Daniel Friesel
Browse files

Add Pervasive Aurora Mb E-Paper driver

parent cecc5e4e

include/driver/pervasive_aurora_mb.h

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/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 *

 * Driver for Pervasive Aurora Mb E-Paper displays with internal Timing

 * Controller (iTC). Configured for the 300x400px 4.2" variant.

 */

#pragma once



class PervasiveAuroraMb {

	private:

		PervasiveAuroraMb(const PervasiveAuroraMb &copy);

		bool isBusy();

		void spiWrite(unsigned char reg, const unsigned char *txbuf, unsigned int length);



	public:

		PervasiveAuroraMb() {}



		void setup();

		void powerOn();

		void initialize(signed char temperature = 20);

		void sendImage(unsigned char *frame);

		void sendUpdate();

		void powerOff();

};



extern PervasiveAuroraMb pervasiveAuroraMb;

src/driver/Kconfig

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@@ -72,6 +72,10 @@ config driver_nrf24l01 
bool "nRF24L01+ 2.4GHz Radio"

depends on meta_driver_spi



config driver_pervasive_aurora_mb

bool "Pervasive Aurora Mb"

depends on ( arch_msp430fr5969lp || arch_msp430fr5994lp ) && meta_driver_spi



# resistive_load is AEMR-specific and not included in Kconfig



# s5851a is broken and incomplete

src/driver/pervasive_aurora_mb.cc

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/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 *

 * Driver for Pervasive Aurora Mb E-Paper displays with internal Timing

 * Controller (iTC). Configured for the 300x400px 4.2" variant.

 */

#include "driver/pervasive_aurora_mb.h"

#include "driver/spi.h"

#include "driver/gpio.h"

#include "arch.h"



void PervasiveAuroraMb::setup()

{

	gpio.output(PERVASIVE_AURORA_RESET_PIN, 0);

	gpio.output(PERVASIVE_AURORA_CS_PIN, 0);

	gpio.output(PERVASIVE_AURORA_DC_PIN, 0);

	gpio.output(PERVASIVE_AURORA_VCC_PIN, 0);

	gpio.input(PERVASIVE_AURORA_BUSY_PIN);

}



void PervasiveAuroraMb::powerOn()

{

	gpio.write(PERVASIVE_AURORA_VCC_PIN, 1);

	arch.delay_ms(5);

	gpio.write(PERVASIVE_AURORA_RESET_PIN, 1);

	arch.delay_ms(1);

	gpio.write(PERVASIVE_AURORA_CS_PIN, 1);

}



void PervasiveAuroraMb::initialize(signed char temperature)

{

	// "Input Temperature"

	spiWrite(0xe5, (const unsigned char*)&temperature, 1);



	// "Active Temperature"

	spiWrite(0xe0, (const unsigned char[]){0x02}, 1);



	// "Panel Settings"

	spiWrite(0x00, (const unsigned char[]){0x0f}, 1);



	// "Panel Settings"

	spiWrite(0x00, (const unsigned char[]){0x0f}, 1);



	// "Booster soft start settings"

	spiWrite(0x06, (const unsigned char[]){0x17, 0x17, 0x27}, 3);



	// "Resolution settings": 300 x 400 -> 0x12c x 0x190

	spiWrite(0x61, (const unsigned char[]){0x01, 0x90, 0x01, 0x2c}, 4);



	// "Vcom and data interval setting"

	spiWrite(0x50, (const unsigned char[]){0x87}, 1);



	// "Power Saving"

	spiWrite(0xe3, (const unsigned char[]){0x88}, 1);

}



void PervasiveAuroraMb::sendImage(unsigned char *frame)

{

	unsigned char null_int[2] = {0x00, 0x00};

	spiWrite(0x10, 0, 0);



	gpio.write(PERVASIVE_AURORA_CS_PIN, 0);

	spi.xmit(300*(400/8), frame, 0, frame);

	gpio.write(PERVASIVE_AURORA_CS_PIN, 1);



	/*

	 * Second Pass: All zeroes (-> update entire display).

	 * A 1 bit indicates that the corresponding pixel should be skipped.

	 */

	spiWrite(0x13, 0, 0);

	gpio.write(PERVASIVE_AURORA_CS_PIN, 0);

	for (unsigned int i = 0; i < 300*(400/16); i++) {

		spi.xmit(2, null_int, 0, frame);

	}

	gpio.write(PERVASIVE_AURORA_CS_PIN, 1);

}



void PervasiveAuroraMb::sendUpdate()

{

	while (isBusy()) ;



	spiWrite(0x04, 0, 0);



	while (isBusy()) ;



	spiWrite(0x12, 0, 0);



	while (isBusy()) ;

}



void PervasiveAuroraMb::powerOff()

{

	spiWrite(0x02, 0, 0);

	while (isBusy()) ;

	gpio.output(PERVASIVE_AURORA_RESET_PIN, 0);

	gpio.output(PERVASIVE_AURORA_CS_PIN, 0);

	gpio.output(PERVASIVE_AURORA_DC_PIN, 0);

	gpio.output(PERVASIVE_AURORA_VCC_PIN, 0);

}



bool PervasiveAuroraMb::isBusy()

{

	return !gpio.read(PERVASIVE_AURORA_BUSY_PIN);

}



void PervasiveAuroraMb::spiWrite(unsigned char reg, const unsigned char *txbuf, unsigned int length)

{

	gpio.write(PERVASIVE_AURORA_DC_PIN, 0);

	gpio.write(PERVASIVE_AURORA_CS_PIN, 0);



	spi.xmit(1, &reg, 0, 0);



	gpio.write(PERVASIVE_AURORA_CS_PIN, 1);

	gpio.write(PERVASIVE_AURORA_DC_PIN, 1);



	if (length) {

		arch.delay_us(1);

		gpio.write(PERVASIVE_AURORA_CS_PIN, 0);

		spi.xmit(length, (unsigned char*)txbuf, 0, 0);

		gpio.write(PERVASIVE_AURORA_CS_PIN, 1);

	}

}



PervasiveAuroraMb pervasiveAuroraMb;