WallSegmentClock/app/max7219.cpp

/* max7219.cpp
 * MAX7219 Interaction Code
 * ---------------------------
 * For more information see
 * http://www.adnbr.co.uk/articles/max7219-and-7-segment-displays
 *
 *  Created on: 29 ñ³÷. 2016
 *      Author: shilov
 */

#include <user_config.h>
#include <SmingCore/SmingCore.h>
#include "configuration.h"
#include "max7219.h"

// çàù¸ëêà
#define MAX7219_LOAD1			PinSet(PIN_LOAD)
#define MAX7219_LOAD0			PinRes(PIN_LOAD)

#define MAX7219_ON				0x01
#define MAX7219_OFF				0x00
#define MAX7219_BRIGHT			0x08

// ïåðåâîä ÷èñëà 0-7 â íîìåð èíäèêàòîðà
const uint8_t max7219_dig[8] = {
	0x05,0x01,0x07,0x03,0x04,0x08,0x06,0x02
};

// ïðîãðàììíûé SPI. Âûâîäèò áàéò íà÷èíàÿ ñî ñòàðøåãî áèòà
// âûõîäíûå ïèíû -- SCK, MOSI
static void spi_SendByte (uint8_t DataByte) {
	uint8_t i; // ñ÷åò÷èê áèò

	for (i=8; i!=0; i--) {
		PinRes(PIN_CLK); // âûäàëè ñòðîá
		if (bit_is_set(DataByte,7)) { // åñëè áèò 7 == 1
			PinSet(PIN_DIN); // MOSI = 1
		} else { // åñëè áèò 7 == 0
			PinRes(PIN_DIN); // MOSI = 0
		}
		PinSet(PIN_CLK); // çàù¸ëêíóëè ñòðîá
		DataByte <<= 1; // ñäâèã âëåâî íà 1 áèò
	}

}

void MAX7219_writeData(uint8_t reg, uint8_t data)
{
    MAX7219_LOAD0; // îïóñòèëè çàù¸ëêó
//    spi_SendByte(reg);
//    spi_SendByte(data);

    // software spi
	uint8_t i; // ñ÷åò÷èê áèò
	uint16_t sdata = (reg<<8) || data;
	for (i=16; i!=0; i--) {
		PinRes(PIN_CLK); // âûäàëè ñòðîá
		if (bit_is_set(sdata,15)) { // åñëè ñòàðøèé áèò == 1
			PinSet(PIN_DIN); // MOSI = 1
		} else { // åñëè ñòàðøèé áèò == 0
			PinRes(PIN_DIN); // MOSI = 0
		}
		PinSet(PIN_CLK); // çàù¸ëêíóëè ñòðîá
		sdata <<= 1; // ñäâèã âëåâî íà 1 áèò
	}

    MAX7219_LOAD1; // ïîäíÿëè çàù¸ëêó
}

void MAX7219_Init(void) {
// íàñòðîéêà ïèíîâ SPI
	pinMode(PIN_LOAD, OUTPUT);
	pinMode(PIN_DIN, OUTPUT);
	pinMode(PIN_CLK, OUTPUT);
	PinSet(PIN_LOAD);
	PinSet(PIN_DIN);
	PinSet(PIN_CLK);

//	Íàñòðîéêà MAX71219
	MAX7219_writeData(MAX7219_MODE_DECODE, 0x00); // âñå áåç BCD äåêîäèðîâàíèÿ
	MAX7219_writeData(MAX7219_MODE_SCAN_LIMIT, MAX7219_DIGITS - 1); // Scan limit runs from 0.
	MAX7219_writeData(MAX7219_MODE_INTENSITY, MAX7219_BRIGHT); // ÿðêîñòü èç 16
	MAX7219_writeData(MAX7219_MODE_POWER,MAX7219_ON); // âêëþ÷èëè ïèòàíèå

}