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DMA now works with both SPI0 and SPI1

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master
Steve Lascos 7 years ago
parent cf7528ee8a
commit e894318451
2 changed files with 6 additions and 463 deletions
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  1. 461
      src/BASpiMemory.cpp
  2. 8
      src/BASpiMemory.h

461
src/BASpiMemory.cpp
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@ -1,461 +0,0 @@
/*
* BASpiMemory.cpp
*
* Created on: May 22, 2017
* Author: slascos
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.*
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Arduino.h"
#include "BASpiMemory.h"
namespace BAGuitar {
// MEM0 Settings
constexpr int SPI_CS_MEM0 = 15;
constexpr int SPI_MOSI_MEM0 = 7;
constexpr int SPI_MISO_MEM0 = 8;
constexpr int SPI_SCK_MEM0 = 14;
// MEM1 Settings
constexpr int SPI_CS_MEM1 = 31;
constexpr int SPI_MOSI_MEM1 = 21;
constexpr int SPI_MISO_MEM1 = 5;
constexpr int SPI_SCK_MEM1 = 20;
// SPI Constants
constexpr int SPI_WRITE_MODE_REG = 0x1;
constexpr int SPI_WRITE_CMD = 0x2;
constexpr int SPI_READ_CMD = 0x3;
constexpr int SPI_ADDR_2_MASK = 0xFF0000;
constexpr int SPI_ADDR_2_SHIFT = 16;
constexpr int SPI_ADDR_1_MASK = 0x00FF00;
constexpr int SPI_ADDR_1_SHIFT = 8;
constexpr int SPI_ADDR_0_MASK = 0x0000FF;
constexpr int CMD_ADDRESS_SIZE = 4;
constexpr int MAX_DMA_XFER_SIZE = 0x4000;
BASpiMemory::BASpiMemory(SpiDeviceId memDeviceId)
{
m_memDeviceId = memDeviceId;
m_settings = {20000000, MSBFIRST, SPI_MODE0};
}
BASpiMemory::BASpiMemory(SpiDeviceId memDeviceId, uint32_t speedHz)
{
m_memDeviceId = memDeviceId;
m_settings = {speedHz, MSBFIRST, SPI_MODE0};
}
// Intitialize the correct Arduino SPI interface
void BASpiMemory::begin()
{
switch (m_memDeviceId) {
case SpiDeviceId::SPI_DEVICE0 :
m_csPin = SPI_CS_MEM0;
m_spi = &SPI;
m_spi->setMOSI(SPI_MOSI_MEM0);
m_spi->setMISO(SPI_MISO_MEM0);
m_spi->setSCK(SPI_SCK_MEM0);
m_spi->begin();
break;
#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
case SpiDeviceId::SPI_DEVICE1 :
m_csPin = SPI_CS_MEM1;
m_spi = &SPI1;
m_spi->setMOSI(SPI_MOSI_MEM1);
m_spi->setMISO(SPI_MISO_MEM1);
m_spi->setSCK(SPI_SCK_MEM1);
m_spi->begin();
break;
#endif
default :
// unreachable since memDeviceId is an enumerated class
return;
}
pinMode(m_csPin, OUTPUT);
digitalWrite(m_csPin, HIGH);
m_started = true;
}
BASpiMemory::~BASpiMemory() {
}
// Single address write
void BASpiMemory::write(size_t address, uint8_t data)
{
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer(SPI_WRITE_CMD);
m_spi->transfer((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
m_spi->transfer((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
m_spi->transfer((address & SPI_ADDR_0_MASK));
m_spi->transfer(data);
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
}
// Single address write
void BASpiMemory::write(size_t address, uint8_t *src, size_t numBytes)
{
uint8_t *dataPtr = src;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer(SPI_WRITE_CMD);
m_spi->transfer((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
m_spi->transfer((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
m_spi->transfer((address & SPI_ADDR_0_MASK));
for (size_t i=0; i < numBytes; i++) {
m_spi->transfer(*dataPtr++);
}
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
}
void BASpiMemory::zero(size_t address, size_t numBytes)
{
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer(SPI_WRITE_CMD);
m_spi->transfer((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
m_spi->transfer((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
m_spi->transfer((address & SPI_ADDR_0_MASK));
for (size_t i=0; i < numBytes; i++) {
m_spi->transfer(0);
}
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
}
void BASpiMemory::write16(size_t address, uint16_t data)
{
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer16((SPI_WRITE_CMD << 8) | (address >> 16) );
m_spi->transfer16(address & 0xFFFF);
m_spi->transfer16(data);
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
}
void BASpiMemory::write16(size_t address, uint16_t *src, size_t numWords)
{
uint16_t *dataPtr = src;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer16((SPI_WRITE_CMD << 8) | (address >> 16) );
m_spi->transfer16(address & 0xFFFF);
for (size_t i=0; i<numWords; i++) {
m_spi->transfer16(*dataPtr++);
}
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
}
void BASpiMemory::zero16(size_t address, size_t numWords)
{
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer16((SPI_WRITE_CMD << 8) | (address >> 16) );
m_spi->transfer16(address & 0xFFFF);
for (size_t i=0; i<numWords; i++) {
m_spi->transfer16(0);
}
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
Serial.println("DONE!");
}
// single address read
uint8_t BASpiMemory::read(size_t address)
{
int data;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer(SPI_READ_CMD);
m_spi->transfer((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
m_spi->transfer((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
m_spi->transfer((address & SPI_ADDR_0_MASK));
data = m_spi->transfer(0);
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
return data;
}
void BASpiMemory::read(size_t address, uint8_t *dest, size_t numBytes)
{
uint8_t *dataPtr = dest;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer(SPI_READ_CMD);
m_spi->transfer((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
m_spi->transfer((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
m_spi->transfer((address & SPI_ADDR_0_MASK));
for (size_t i=0; i<numBytes; i++) {
*dataPtr++ = m_spi->transfer(0);
}
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
}
uint16_t BASpiMemory::read16(size_t address)
{
uint16_t data;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer16((SPI_READ_CMD << 8) | (address >> 16) );
m_spi->transfer16(address & 0xFFFF);
data = m_spi->transfer16(0);
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
return data;
}
void BASpiMemory::read16(size_t address, uint16_t *dest, size_t numWords)
{
uint16_t *dataPtr = dest;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
m_spi->transfer16((SPI_READ_CMD << 8) | (address >> 16) );
m_spi->transfer16(address & 0xFFFF);
for (size_t i=0; i<numWords; i++) {
*dataPtr++ = m_spi->transfer16(0);
}
m_spi->endTransaction();
digitalWrite(m_csPin, HIGH);
}
/////////////////////////////////////////////////////////////////////////////
// BASpiMemoryDMA
/////////////////////////////////////////////////////////////////////////////
BASpiMemoryDMA::BASpiMemoryDMA(SpiDeviceId memDeviceId)
: BASpiMemory(memDeviceId)
{
int cs;
switch (memDeviceId) {
case SpiDeviceId::SPI_DEVICE0 :
cs = SPI_CS_MEM0;
break;
case SpiDeviceId::SPI_DEVICE1 :
cs = SPI_CS_MEM1;
break;
default :
cs = SPI_CS_MEM0;
}
m_cs = new ActiveLowChipSelect(cs, m_settings);
// add 4 bytes to buffer for SPI CMD and 3 bytes of address
m_txCommandBuffer = new uint8_t[CMD_ADDRESS_SIZE];
m_rxCommandBuffer = new uint8_t[CMD_ADDRESS_SIZE];
m_txTransfer = new DmaSpi::Transfer[2];
m_rxTransfer = new DmaSpi::Transfer[2];
}
BASpiMemoryDMA::BASpiMemoryDMA(SpiDeviceId memDeviceId, uint32_t speedHz)
: BASpiMemory(memDeviceId, speedHz)
{
int cs;
switch (memDeviceId) {
case SpiDeviceId::SPI_DEVICE0 :
cs = SPI_CS_MEM0;
break;
case SpiDeviceId::SPI_DEVICE1 :
cs = SPI_CS_MEM1;
break;
default :
cs = SPI_CS_MEM0;
}
m_cs = new ActiveLowChipSelect(cs, m_settings);
m_txCommandBuffer = new uint8_t[CMD_ADDRESS_SIZE];
m_rxCommandBuffer = new uint8_t[CMD_ADDRESS_SIZE];
m_txTransfer = new DmaSpi::Transfer[2];
m_rxTransfer = new DmaSpi::Transfer[2];
}
BASpiMemoryDMA::~BASpiMemoryDMA()
{
delete m_cs;
if (m_txTransfer) delete [] m_txTransfer;
if (m_rxTransfer) delete [] m_rxTransfer;
if (m_txCommandBuffer) delete [] m_txCommandBuffer;
if (m_rxCommandBuffer) delete [] m_txCommandBuffer;
}
void BASpiMemoryDMA::m_setSpiCmdAddr(int command, size_t address, uint8_t *dest)
{
dest[0] = command;
dest[1] = ((address & SPI_ADDR_2_MASK) >> SPI_ADDR_2_SHIFT);
dest[2] = ((address & SPI_ADDR_1_MASK) >> SPI_ADDR_1_SHIFT);
dest[3] = ((address & SPI_ADDR_0_MASK));
}
void BASpiMemoryDMA::begin(void)
{
switch (m_memDeviceId) {
case SpiDeviceId::SPI_DEVICE0 :
m_csPin = SPI_CS_MEM0;
m_spi = &SPI;
m_spi->setMOSI(SPI_MOSI_MEM0);
m_spi->setMISO(SPI_MISO_MEM0);
m_spi->setSCK(SPI_SCK_MEM0);
m_spi->begin();
m_spiDma = &DMASPI0;
break;
#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
case SpiDeviceId::SPI_DEVICE1 :
m_csPin = SPI_CS_MEM1;
m_spi = &SPI1;
m_spi->setMOSI(SPI_MOSI_MEM1);
m_spi->setMISO(SPI_MISO_MEM1);
m_spi->setSCK(SPI_SCK_MEM1);
m_spi->begin();
m_spiDma = &DMASPI1;
break;
#endif
default :
// unreachable since memDeviceId is an enumerated class
return;
}
m_spiDma->begin();
m_spiDma->start();
m_started = true;
}
// SPI must build up a payload that starts the teh CMD/Address first. It will cycle
// through the payloads in a circular buffer and use the transfer objects to check if they
// are done before continuing.
void BASpiMemoryDMA::write(size_t address, uint8_t *src, size_t numBytes)
{
size_t bytesRemaining = numBytes;
uint8_t *srcPtr = src;
size_t nextAddress = address;
while (bytesRemaining > 0) {
m_txXferCount = min(bytesRemaining, MAX_DMA_XFER_SIZE);
while ( m_txTransfer[1].busy()) {} // wait until not busy
m_setSpiCmdAddr(SPI_WRITE_CMD, nextAddress, m_txCommandBuffer);
m_txTransfer[1] = DmaSpi::Transfer(m_txCommandBuffer, CMD_ADDRESS_SIZE, nullptr, 0, m_cs, TransferType::NO_END_CS);
m_spiDma->registerTransfer(m_txTransfer[1]);
while ( m_txTransfer[0].busy()) {} // wait until not busy
m_txTransfer[0] = DmaSpi::Transfer(srcPtr, m_txXferCount, nullptr, 0, m_cs, TransferType::NO_START_CS);
m_spiDma->registerTransfer(m_txTransfer[0]);
bytesRemaining -= m_txXferCount;
srcPtr += m_txXferCount;
nextAddress += m_txXferCount;
}
}
void BASpiMemoryDMA::zero(size_t address, size_t numBytes)
{
size_t bytesRemaining = numBytes;
size_t nextAddress = address;
while (bytesRemaining > 0) {
m_txXferCount = min(bytesRemaining, MAX_DMA_XFER_SIZE);
while ( m_txTransfer[1].busy()) {} // wait until not busy
m_setSpiCmdAddr(SPI_WRITE_CMD, nextAddress, m_txCommandBuffer);
m_txTransfer[1] = DmaSpi::Transfer(m_txCommandBuffer, CMD_ADDRESS_SIZE, nullptr, 0, m_cs, TransferType::NO_END_CS);
m_spiDma->registerTransfer(m_txTransfer[1]);
while ( m_txTransfer[0].busy()) {} // wait until not busy
m_txTransfer[0] = DmaSpi::Transfer(nullptr, m_txXferCount, nullptr, 0, m_cs, TransferType::NO_START_CS);
m_spiDma->registerTransfer(m_txTransfer[0]);
bytesRemaining -= m_txXferCount;
nextAddress += m_txXferCount;
}
}
void BASpiMemoryDMA::write16(size_t address, uint16_t *src, size_t numWords)
{
write(address, reinterpret_cast<uint8_t*>(src), sizeof(uint16_t)*numWords);
}
void BASpiMemoryDMA::zero16(size_t address, size_t numWords)
{
zero(address, sizeof(uint16_t)*numWords);
}
void BASpiMemoryDMA::read(size_t address, uint8_t *dest, size_t numBytes)
{
size_t bytesRemaining = numBytes;
uint8_t *destPtr = dest;
size_t nextAddress = address;
while (bytesRemaining > 0) {
m_setSpiCmdAddr(SPI_READ_CMD, nextAddress, m_rxCommandBuffer);
while ( m_rxTransfer[1].busy()) {}
m_rxTransfer[1] = DmaSpi::Transfer(m_rxCommandBuffer, CMD_ADDRESS_SIZE, nullptr, 0, m_cs, TransferType::NO_END_CS);
m_spiDma->registerTransfer(m_rxTransfer[1]);
m_rxXferCount = min(bytesRemaining, MAX_DMA_XFER_SIZE);
while ( m_rxTransfer[0].busy()) {}
m_rxTransfer[0] = DmaSpi::Transfer(nullptr, m_rxXferCount, destPtr, 0, m_cs, TransferType::NO_START_CS);
m_spiDma->registerTransfer(m_rxTransfer[0]);
bytesRemaining -= m_rxXferCount;
destPtr += m_rxXferCount;
nextAddress += m_rxXferCount;
}
}
void BASpiMemoryDMA::read16(size_t address, uint16_t *dest, size_t numWords)
{
read(address, reinterpret_cast<uint8_t*>(dest), sizeof(uint16_t)*numWords);
}
bool BASpiMemoryDMA::isWriteBusy(void) const
{
return (m_txTransfer[0].busy() or m_txTransfer[1].busy());
}
bool BASpiMemoryDMA::isReadBusy(void) const
{
return (m_rxTransfer[0].busy() or m_rxTransfer[1].busy());
}
} /* namespace BAGuitar */

8
src/BASpiMemory.h
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@ -194,8 +194,12 @@ public:
void readBufferContents(uint16_t *dest, size_t numWords, size_t wordOffset = 0);
private:
AbstractDmaSpi<DmaSpi0, SPIClass, SPI> *m_spiDma = nullptr;
ActiveLowChipSelect *m_cs = nullptr;
//AbstractDmaSpi<DmaSpi0, SPIClass, SPI> *m_spiDma = nullptr;
//AbstractDmaSpi<DmaSpi0, SPIClass, SPI1> *m_spiDma = nullptr;
DmaSpiGeneric *m_spiDma = nullptr;
AbstractChipSelect *m_cs = nullptr;
//size_t m_bufferSize;
//uint8_t *m_txBuffer = nullptr;
uint8_t *m_txCommandBuffer = nullptr;

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