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155 lines
3.9 KiB
155 lines
3.9 KiB
/*
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* BASpiMemory.cpp
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*
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* Created on: May 22, 2017
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* Author: slascos
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.*
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Arduino.h"
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#include "BASpiMemory.h"
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namespace BAGuitar {
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// MEM0 Settings
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constexpr int SPI_CS_MEM0 = 15;
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constexpr int SPI_MOSI_MEM0 = 7;
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constexpr int SPI_MISO_MEM0 = 8;
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constexpr int SPI_SCK_MEM0 = 14;
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// MEM1 Settings
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constexpr int SPI_CS_MEM1 = 31;
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constexpr int SPI_MOSI_MEM1 = 21;
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constexpr int SPI_MISO_MEM1 = 5;
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constexpr int SPI_SCK_MEM1 = 20;
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// SPI Constants
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constexpr int SPI_WRITE_CMD = 0x2;
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constexpr int SPI_READ_CMD = 0x3;
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constexpr int SPI_ADDR_2_MASK = 0xFF0000;
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constexpr int SPI_ADDR_2_SHIFT = 16;
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constexpr int SPI_ADDR_1_MASK = 0x00FF00;
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constexpr int SPI_ADDR_1_SHIFT = 8;
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constexpr int SPI_ADDR_0_MASK = 0x0000FF;
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BASpiMemory::BASpiMemory(SpiDeviceId memDeviceId)
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{
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m_memDeviceId = memDeviceId;
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m_settings = {20000000, MSBFIRST, SPI_MODE0};
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}
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BASpiMemory::BASpiMemory(SpiDeviceId memDeviceId, uint32_t speedHz)
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{
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m_memDeviceId = memDeviceId;
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m_settings = {speedHz, MSBFIRST, SPI_MODE0};
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}
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// Intitialize the correct Arduino SPI interface
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void BASpiMemory::begin()
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{
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switch (m_memDeviceId) {
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case SpiDeviceId::SPI_DEVICE0 :
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m_csPin = SPI_CS_MEM0;
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m_spi = &SPI;
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m_spi->setMOSI(SPI_MOSI_MEM0);
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m_spi->setMISO(SPI_MISO_MEM0);
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m_spi->setSCK(SPI_SCK_MEM0);
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m_spi->begin();
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break;
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#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
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case SpiDeviceId::SPI_DEVICE1 :
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m_csPin = SPI_CS_MEM1;
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m_spi = &SPI1;
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m_spi->setMOSI(SPI_MOSI_MEM1);
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m_spi->setMISO(SPI_MISO_MEM1);
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m_spi->setSCK(SPI_SCK_MEM1);
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m_spi->begin();
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break;
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#endif
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default :
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// unreachable since memDeviceId is an enumerated class
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return;
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}
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pinMode(m_csPin, OUTPUT);
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digitalWrite(m_csPin, HIGH);
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}
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BASpiMemory::~BASpiMemory() {
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}
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// Single address write
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void BASpiMemory::write(int address, int data)
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{
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m_spi->beginTransaction(m_settings);
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digitalWrite(m_csPin, LOW);
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m_spi->transfer(SPI_WRITE_CMD);
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m_spi->transfer((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
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m_spi->transfer((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
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m_spi->transfer((address & SPI_ADDR_0_MASK));
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m_spi->transfer(data);
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m_spi->endTransaction();
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digitalWrite(m_csPin, HIGH);
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}
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void BASpiMemory::write16(int address, uint16_t data)
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{
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m_spi->beginTransaction(m_settings);
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digitalWrite(m_csPin, LOW);
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m_spi->transfer16((SPI_WRITE_CMD << 8) | (address >> 16) );
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m_spi->transfer16(address & 0xFFFF);
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m_spi->transfer16(data);
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m_spi->endTransaction();
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digitalWrite(m_csPin, HIGH);
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}
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// single address read
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int BASpiMemory::read(int address)
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{
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int data;
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m_spi->beginTransaction(m_settings);
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digitalWrite(m_csPin, LOW);
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m_spi->transfer(SPI_READ_CMD);
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m_spi->transfer((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
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m_spi->transfer((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
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m_spi->transfer((address & SPI_ADDR_0_MASK));
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data = m_spi->transfer(0);
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m_spi->endTransaction();
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digitalWrite(m_csPin, HIGH);
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return data;
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}
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uint16_t BASpiMemory::read16(int address)
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{
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uint16_t data;
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m_spi->beginTransaction(m_settings);
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digitalWrite(m_csPin, LOW);
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m_spi->transfer16((SPI_READ_CMD << 8) | (address >> 16) );
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m_spi->transfer16(address & 0xFFFF);
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data = m_spi->transfer16(0);
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m_spi->endTransaction();
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digitalWrite(m_csPin, HIGH);
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return data;
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}
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} /* namespace BAGuitar */
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