parasiTstudio
/
BALibrary_parasitstudio
forked from wirtz/BALibrary
3
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Working check in of BASpiMemoryDMA for SPI0

Browse Source
master
Steve Lascos 7 years ago
parent c5383595c1
commit d3aa6667ce
2 changed files with 116 additions and 27 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 52
      src/BASpiMemory.cpp
  2. 91
      src/BASpiMemory.h

52
src/BASpiMemory.cpp
Unescape View File

@ -111,9 +111,9 @@ void BASpiMemory::write(size_t address, uint8_t data)
}
// Single address write
void BASpiMemory::write(size_t address, uint8_t *data, size_t numBytes)
void BASpiMemory::write(size_t address, uint8_t *src, size_t numBytes)
{
uint8_t *dataPtr = data;
uint8_t *dataPtr = src;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
@ -157,9 +157,9 @@ void BASpiMemory::write16(size_t address, uint16_t data)
digitalWrite(m_csPin, HIGH);
}
void BASpiMemory::write16(size_t address, uint16_t *data, size_t numWords)
void BASpiMemory::write16(size_t address, uint16_t *src, size_t numWords)
{
uint16_t *dataPtr = data;
uint16_t *dataPtr = src;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
@ -208,9 +208,9 @@ uint8_t BASpiMemory::read(size_t address)
}
void BASpiMemory::read(size_t address, uint8_t *data, size_t numBytes)
void BASpiMemory::read(size_t address, uint8_t *dest, size_t numBytes)
{
uint8_t *dataPtr = data;
uint8_t *dataPtr = dest;
m_spi->beginTransaction(m_settings);
digitalWrite(m_csPin, LOW);
@ -280,6 +280,8 @@ BASpiMemoryDMA::BASpiMemoryDMA(SpiDeviceId memDeviceId, size_t bufferSizeBytes)
// add 4 bytes to buffer for SPI CMD and 3 bytes of addresse
m_txBuffer = new uint8_t[bufferSizeBytes+4];
m_rxBuffer = new uint8_t[bufferSizeBytes+4];
m_txTransfer = new DmaSpi::Transfer();
m_rxTransfer = new DmaSpi::Transfer();
}
BASpiMemoryDMA::BASpiMemoryDMA(SpiDeviceId memDeviceId, uint32_t speedHz, size_t bufferSizeBytes)
@ -299,6 +301,8 @@ BASpiMemoryDMA::BASpiMemoryDMA(SpiDeviceId memDeviceId, uint32_t speedHz, size_t
m_cs = new ActiveLowChipSelect(cs, m_settings);
m_txBuffer = new uint8_t[bufferSizeBytes+4];
m_rxBuffer = new uint8_t[bufferSizeBytes+4];
m_txTransfer = new DmaSpi::Transfer();
m_rxTransfer = new DmaSpi::Transfer();
}
BASpiMemoryDMA::~BASpiMemoryDMA()
@ -306,6 +310,8 @@ BASpiMemoryDMA::~BASpiMemoryDMA()
delete m_cs;
if (m_txBuffer) delete [] m_txBuffer;
if (m_rxBuffer) delete [] m_rxBuffer;
if (m_txTransfer) delete m_txTransfer;
if (m_rxTransfer) delete m_rxTransfer;
}
void BASpiMemoryDMA::m_setSpiCmdAddr(int command, size_t address, uint8_t *dest)
@ -355,12 +361,12 @@ void BASpiMemoryDMA::begin(void)
// 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 *data, size_t numBytes)
void BASpiMemoryDMA::write(size_t address, uint8_t *src, size_t numBytes)
{
while ( m_txTransfer->busy()) {} // wait until not busy
uint16_t transferCount = numBytes + 4; // transfer must be increased by the SPI command and address
m_setSpiCmdAddr(SPI_WRITE_CMD, address, m_txBuffer);
memcpy(m_txBuffer+4, data, numBytes);
memcpy(m_txBuffer+4, src, numBytes);
*m_txTransfer = DmaSpi::Transfer(m_txBuffer, transferCount, nullptr, 0, m_cs);
m_spiDma->registerTransfer(*m_txTransfer);
}
@ -370,17 +376,18 @@ void BASpiMemoryDMA::zero(size_t address, size_t numBytes)
while ( m_txTransfer->busy()) {}
uint16_t transferCount = numBytes + 4;
m_setSpiCmdAddr(SPI_WRITE_CMD, address, m_txBuffer);
*m_txTransfer = DmaSpi::Transfer(nullptr, transferCount, nullptr, 0, m_cs);
memset(m_txBuffer+4, 0, numBytes);
*m_txTransfer = DmaSpi::Transfer(m_txBuffer, transferCount, nullptr, 0, m_cs);
m_spiDma->registerTransfer(*m_txTransfer);
}
void BASpiMemoryDMA::write16(size_t address, uint16_t *data, size_t numWords)
void BASpiMemoryDMA::write16(size_t address, uint16_t *src, size_t numWords)
{
while ( m_txTransfer->busy()) {}
size_t numBytes = sizeof(uint16_t)*numWords;
uint16_t transferCount = numBytes + 4;
m_setSpiCmdAddr(SPI_WRITE_CMD, address, m_txBuffer);
memcpy(m_txBuffer+4, data, numBytes);
memcpy(m_txBuffer+4, src, numBytes);
*m_txTransfer = DmaSpi::Transfer(m_txBuffer, transferCount, nullptr, 0, m_cs);
m_spiDma->registerTransfer(*m_txTransfer);
}
@ -402,7 +409,7 @@ void BASpiMemoryDMA::read(size_t address, uint8_t *dest, size_t numBytes)
while ( m_rxTransfer->busy()) {}
uint16_t transferCount = numBytes + 4;
m_setSpiCmdAddr(SPI_READ_CMD, address, m_rxBuffer);
*m_rxTransfer = DmaSpi::Transfer(nullptr, transferCount, m_rxBuffer, 0, m_cs);
*m_rxTransfer = DmaSpi::Transfer(m_rxBuffer, transferCount, m_rxBuffer, 0, m_cs);
m_spiDma->registerTransfer(*m_rxTransfer);
}
@ -413,14 +420,29 @@ void BASpiMemoryDMA::read16(size_t address, uint16_t *dest, size_t numWords)
m_setSpiCmdAddr(SPI_READ_CMD, address, m_rxBuffer);
size_t numBytes = sizeof(uint16_t)*numWords;
uint16_t transferCount = numBytes + 4;
*m_rxTransfer = DmaSpi::Transfer(nullptr, transferCount, m_rxBuffer, 0, m_cs);
*m_rxTransfer = DmaSpi::Transfer(m_rxBuffer, transferCount, m_rxBuffer, 0, m_cs);
m_spiDma->registerTransfer(*m_rxTransfer);
}
void BASpiMemoryDMA::readBufferContents(uint8_t *dest, size_t numBytes, size_t bufferOffset)
bool BASpiMemoryDMA::isWriteBusy(void)
{
return m_txTransfer->busy();
}
bool BASpiMemoryDMA::isReadBusy(void)
{
return m_rxTransfer->busy();
}
void BASpiMemoryDMA::readBufferContents(uint16_t *dest, size_t numWords, size_t wordOffset)
{
readBufferContents(reinterpret_cast<uint8_t *>(dest), sizeof(uint16_t)*numWords, sizeof(uint16_t)*wordOffset);
}
void BASpiMemoryDMA::readBufferContents(uint8_t *dest, size_t numBytes, size_t byteOffset)
{
while (m_rxTransfer->busy()) {} // ensure transfer is complete
memcpy(dest, m_rxBuffer+4+bufferOffset, numBytes);
memcpy(dest, m_rxBuffer+4+byteOffset, numBytes);
}
} /* namespace BAGuitar */

91
src/BASpiMemory.h
Unescape View File

@ -49,25 +49,51 @@ public:
BASpiMemory(SpiDeviceId memDeviceId, uint32_t speedHz);
virtual ~BASpiMemory();
/// initialize and configure the SPI peripheral
virtual void begin();
/// write a single data word to the specified address
/// write a single 8-bit word to the specified address
/// @param address the address in the SPI RAM to write to
/// @param data the value to write
void write(size_t address, uint8_t data);
virtual void write(size_t address, uint8_t *data, size_t numBytes);
/// Write a block of 8-bit data to the specified address
/// @param address the address in the SPI RAM to write to
/// @param src pointer to the source data block
/// @param numBytes size of the data block in bytes
virtual void write(size_t address, uint8_t *src, size_t numBytes);
/// Write a block of zeros to the specified address
/// @param address the address in the SPI RAM to write to
/// @param numBytes size of the data block in bytes
virtual void zero(size_t address, size_t numBytes);
/// write a single 16-bit word to the specified address
/// @param address the address in the SPI RAM to write to
/// @param data the value to write
void write16(size_t address, uint16_t data);
virtual void write16(size_t address, uint16_t *data, size_t numWords);
/// Write a block of 16-bit data to the specified address
/// @param address the address in the SPI RAM to write to
/// @param src pointer to the source data block
/// @param numWords size of the data block in 16-bit words
virtual void write16(size_t address, uint16_t *src, size_t numWords);
/// Write a block of 16-bit zeros to the specified address
/// @param address the address in the SPI RAM to write to
/// @param numWords size of the data block in 16-bit words
virtual void zero16(size_t address, size_t numWords);
/// read a single 8-bit data word from the specified address
/// @param address the address in the SPI RAM to read from
/// @return the data that was read
uint8_t read(size_t address);
virtual void read(size_t address, uint8_t *data, size_t numBytes);
/// Read a block of 8-bit data from the specified address
/// @param address the address in the SPI RAM to write to
/// @param dest pointer to the destination
/// @param numBytes size of the data block in bytes
virtual void read(size_t address, uint8_t *dest, size_t numBytes);
/// read a single 16-bit data word from the specified address
/// @param address the address in the SPI RAM to read from
@ -80,6 +106,8 @@ public:
/// @param numWords the number of 16-bit words to transfer
virtual void read16(size_t address, uint16_t *dest, size_t numWords);
/// Check if the class has been configured by a previous begin() call
/// @returns true if initialized, false if not yet initialized
bool isStarted() const { return m_started; }
protected:
@ -96,11 +124,13 @@ protected:
class BASpiMemoryDMA : public BASpiMemory {
public:
BASpiMemoryDMA() = delete;
/// Create an object to control either MEM0 (via SPI1) or MEM1 (via SPI2).
/// @details default is 20 Mhz
/// @param memDeviceId specify which MEM to control with SpiDeviceId.
/// @param bufferSize size of buffer to store DMA transfers
BASpiMemoryDMA(SpiDeviceId memDeviceId, size_t bufferSizeBytes);
/// Create an object to control either MEM0 (via SPI1) or MEM1 (via SPI2)
/// @param memDeviceId specify which MEM to control with SpiDeviceId.
/// @param speedHz specify the desired speed in Hz.
@ -108,14 +138,35 @@ public:
BASpiMemoryDMA(SpiDeviceId memDeviceId, uint32_t speedHz, size_t bufferSizeBytes);
virtual ~BASpiMemoryDMA();
void write(size_t address, uint8_t *data, size_t numBytes) override;
/// initialize and configure the SPI peripheral
void begin() override;
/// Write a block of 8-bit data to the specified address
/// @param address the address in the SPI RAM to write to
/// @param src pointer to the source data block
/// @param numBytes size of the data block in bytes
void write(size_t address, uint8_t *src, size_t numBytes) override;
/// Write a block of zeros to the specified address
/// @param address the address in the SPI RAM to write to
/// @param numBytes size of the data block in bytes
void zero(size_t address, size_t numBytes) override;
void write16(size_t address, uint16_t *data, size_t numWords) override;
/// Write a block of 16-bit data to the specified address
/// @param address the address in the SPI RAM to write to
/// @param src pointer to the source data block
/// @param numWords size of the data block in 16-bit words
void write16(size_t address, uint16_t *src, size_t numWords) override;
/// Write a block of 16-bit zeros to the specified address
/// @param address the address in the SPI RAM to write to
/// @param numWords size of the data block in 16-bit words
void zero16(size_t address, size_t numWords) override;
/// read a single 8-bit data word from the specified address
/// @param address the address in the SPI RAM to read from
/// @return the data that was read
/// Read a block of 8-bit data from the specified address
/// @param address the address in the SPI RAM to write to
/// @param dest pointer to the destination
/// @param numBytes size of the data block in bytes
void read(size_t address, uint8_t *dest, size_t numBytes) override;
/// read a block 16-bit data word from the specified address
@ -124,9 +175,25 @@ public:
/// @param numWords the number of 16-bit words to transfer
void read16(size_t address, uint16_t *dest, size_t numWords) override;
void begin() override;
void readBufferContents(uint8_t *dest, size_t numBytes, size_t bufferOffset = 0);
/// Check if a DMA write is in progress
/// @returns true if a write DMA is in progress, else false
bool isWriteBusy();
/// Check if a DMA read is in progress
/// @returns true if a read DMA is in progress, else false
bool isReadBusy();
/// Readout the 8-bit contents of the DMA storage buffer to the specified destination
/// @param dest pointer to the destination
/// @param numBytes number of bytes to read out
/// @param byteOffset, offset from the start of the DMA buffer in bytes to begin reading
void readBufferContents(uint8_t *dest, size_t numBytes, size_t byteOffset = 0);
/// Readout the 8-bit contents of the DMA storage buffer to the specified destination
/// @param dest pointer to the destination
/// @param numWords number of 16-bit words to read out
/// @param wordOffset, offset from the start of the DMA buffer in words to begin reading
void readBufferContents(uint16_t *dest, size_t numWords, size_t wordOffset = 0);
private:
AbstractDmaSpi<DmaSpi0, SPIClass, SPI> *m_spiDma = nullptr;

Write Preview
Loading…
Cancel
Save