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221 lines
9.1 KiB
221 lines
9.1 KiB
/**************************************************************************//**
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* @file
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* @author Steve Lascos
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* @company Blackaddr Audio
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*
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* BASpiMemory is convenience class for accessing the optional SPI RAMs on
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* the GTA Series boards. BASpiMemoryDma works the same but uses DMA to reduce
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* load on the processor.
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*
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* @copyright 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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#ifndef __BALIBRARY_BASPIMEMORY_H
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#define __BALIBRARY_BASPIMEMORY_H
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#include <SPI.h>
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#include <DmaSpi.h>
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#include "BATypes.h"
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#include "BAHardware.h"
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namespace BALibrary {
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/**************************************************************************//**
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* This wrapper class uses the Arduino SPI (Wire) library to access the SPI ram.
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* @details The purpose of this class is primilary for functional testing since
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* it currently support single-word access. High performance access should be
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* done using DMA techniques in the Teensy library.
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*****************************************************************************/
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class BASpiMemory {
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public:
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BASpiMemory() = delete;
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/// Create an object to control either MEM0 (via SPI1) or MEM1 (via SPI2).
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/// @details default is 20 Mhz
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/// @param memDeviceId specify which MEM to control with SpiDeviceId.
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BASpiMemory(SpiDeviceId memDeviceId);
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/// Create an object to control either MEM0 (via SPI1) or MEM1 (via SPI2)
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/// @param memDeviceId specify which MEM to control with SpiDeviceId.
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/// @param speedHz specify the desired speed in Hz.
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BASpiMemory(SpiDeviceId memDeviceId, uint32_t speedHz);
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virtual ~BASpiMemory();
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/// initialize and configure the SPI peripheral
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virtual void begin();
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/// write a single 8-bit word to the specified address
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/// @param address the address in the SPI RAM to write to
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/// @param data the value to write
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void write(size_t address, uint8_t data);
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/// Write a block of 8-bit data to the specified address
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/// @param address the address in the SPI RAM to write to
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/// @param src pointer to the source data block
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/// @param numBytes size of the data block in bytes
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virtual void write(size_t address, uint8_t *src, size_t numBytes);
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/// Write a block of zeros to the specified address
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/// @param address the address in the SPI RAM to write to
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/// @param numBytes size of the data block in bytes
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virtual void zero(size_t address, size_t numBytes);
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/// write a single 16-bit word to the specified address
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/// @param address the address in the SPI RAM to write to
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/// @param data the value to write
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void write16(size_t address, uint16_t data);
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/// Write a block of 16-bit data to the specified address
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/// @param address the address in the SPI RAM to write to
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/// @param src pointer to the source data block
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/// @param numWords size of the data block in 16-bit words
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virtual void write16(size_t address, uint16_t *src, size_t numWords);
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/// Write a block of 16-bit zeros to the specified address
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/// @param address the address in the SPI RAM to write to
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/// @param numWords size of the data block in 16-bit words
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virtual void zero16(size_t address, size_t numWords);
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/// read a single 8-bit data word from the specified address
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/// @param address the address in the SPI RAM to read from
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/// @return the data that was read
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uint8_t read(size_t address);
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/// Read a block of 8-bit data from the specified address
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/// @param address the address in the SPI RAM to write to
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/// @param dest pointer to the destination
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/// @param numBytes size of the data block in bytes
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virtual void read(size_t address, uint8_t *dest, size_t numBytes);
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/// read a single 16-bit data word from the specified address
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/// @param address the address in the SPI RAM to read from
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/// @return the data that was read
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uint16_t read16(size_t address);
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/// read a block 16-bit data word from the specified address
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/// @param address the address in the SPI RAM to read from
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/// @param dest the pointer to the destination
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/// @param numWords the number of 16-bit words to transfer
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virtual void read16(size_t address, uint16_t *dest, size_t numWords);
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/// Check if the class has been configured by a previous begin() call
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/// @returns true if initialized, false if not yet initialized
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bool isStarted() const { return m_started; }
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protected:
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SPIClass *m_spi = nullptr;
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SpiDeviceId m_memDeviceId; // the MEM device being control with this instance
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uint8_t m_csPin; // the IO pin number for the CS on the controlled SPI device
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SPISettings m_settings; // the Wire settings for this SPI port
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bool m_started = false;
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};
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class BASpiMemoryDMA : public BASpiMemory {
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public:
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BASpiMemoryDMA() = delete;
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/// Create an object to control either MEM0 (via SPI1) or MEM1 (via SPI2).
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/// @details default is 20 Mhz
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/// @param memDeviceId specify which MEM to control with SpiDeviceId.
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BASpiMemoryDMA(SpiDeviceId memDeviceId);
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/// Create an object to control either MEM0 (via SPI1) or MEM1 (via SPI2)
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/// @param memDeviceId specify which MEM to control with SpiDeviceId.
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/// @param speedHz specify the desired speed in Hz.
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BASpiMemoryDMA(SpiDeviceId memDeviceId, uint32_t speedHz);
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virtual ~BASpiMemoryDMA();
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/// initialize and configure the SPI peripheral
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void begin() override;
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/// Write a block of 8-bit data to the specified address. Be check
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/// isWriteBusy() before sending the next DMA transfer.
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/// @param address the address in the SPI RAM to write to
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/// @param src pointer to the source data block
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/// @param numBytes size of the data block in bytes
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void write(size_t address, uint8_t *src, size_t numBytes) override;
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/// Write a block of zeros to the specified address. Be check
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/// isWriteBusy() before sending the next DMA transfer.
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/// @param address the address in the SPI RAM to write to
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/// @param numBytes size of the data block in bytes
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void zero(size_t address, size_t numBytes) override;
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/// Write a block of 16-bit data to the specified address. Be check
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/// isWriteBusy() before sending the next DMA transfer.
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/// @param address the address in the SPI RAM to write to
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/// @param src pointer to the source data block
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/// @param numWords size of the data block in 16-bit words
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void write16(size_t address, uint16_t *src, size_t numWords) override;
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/// Write a block of 16-bit zeros to the specified address. Be check
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/// isWriteBusy() before sending the next DMA transfer.
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/// @param address the address in the SPI RAM to write to
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/// @param numWords size of the data block in 16-bit words
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void zero16(size_t address, size_t numWords) override;
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/// Read a block of 8-bit data from the specified address. Be check
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/// isReadBusy() before sending the next DMA transfer.
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/// @param address the address in the SPI RAM to write to
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/// @param dest pointer to the destination
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/// @param numBytes size of the data block in bytes
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void read(size_t address, uint8_t *dest, size_t numBytes) override;
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/// read a block 16-bit data word from the specified address. Be check
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/// isReadBusy() before sending the next DMA transfer.
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/// @param address the address in the SPI RAM to read from
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/// @param dest the pointer to the destination
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/// @param numWords the number of 16-bit words to transfer
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void read16(size_t address, uint16_t *dest, size_t numWords) override;
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/// Check if a DMA write is in progress
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/// @returns true if a write DMA is in progress, else false
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bool isWriteBusy() const;
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/// Check if a DMA read is in progress
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/// @returns true if a read DMA is in progress, else false
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bool isReadBusy() const;
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/// Readout the 8-bit contents of the DMA storage buffer to the specified destination
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/// @param dest pointer to the destination
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/// @param numBytes number of bytes to read out
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/// @param byteOffset, offset from the start of the DMA buffer in bytes to begin reading
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void readBufferContents(uint8_t *dest, size_t numBytes, size_t byteOffset = 0);
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/// Readout the 8-bit contents of the DMA storage buffer to the specified destination
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/// @param dest pointer to the destination
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/// @param numWords number of 16-bit words to read out
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/// @param wordOffset, offset from the start of the DMA buffer in words to begin reading
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void readBufferContents(uint16_t *dest, size_t numWords, size_t wordOffset = 0);
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private:
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DmaSpiGeneric *m_spiDma = nullptr;
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AbstractChipSelect *m_cs = nullptr;
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uint8_t *m_txCommandBuffer = nullptr;
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DmaSpi::Transfer *m_txTransfer;
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uint8_t *m_rxCommandBuffer = nullptr;
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DmaSpi::Transfer *m_rxTransfer;
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uint16_t m_txXferCount;
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uint16_t m_rxXferCount;
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void m_setSpiCmdAddr(int command, size_t address, uint8_t *dest);
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};
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} /* namespace BALibrary */
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#endif /* __BALIBRARY_BASPIMEMORY_H */
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