63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
// NOTE - The 27 series device support is a work in progress. It
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// has not been tested or documented.
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#ifndef INCLUDE_PROM_DEVICE_27_H
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#define INCLUDE_PROM_DEVICE_27_H
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#include "Arduino.h"
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#include "PromDevice.h"
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/*****************************************************************************/
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/*****************************************************************************/
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/**
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* PromDevice27 class
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*
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* Provides the device-specific interface to read and write data from a
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* 27 or 27C series parallel EPROM using the Arduino. Supported chips
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* include 2716, 2732, 2764, 27C040, and 27C2001.
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*
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* Intelligent programming algorithms, like TurboProgram and Presto II, are supported.
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* These allow a variable number of shorter program pulses until the byte verifies. This
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* is optionally followed by an overprogram pulse that is a multiple of the number of
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* program pulses that were written.
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*
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*
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* See the constructor definition for an explanation of the parameters that
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* control programming.
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*/
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enum E27C_PGM {
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E27C_PGM_WE, // Dedicated WE or PGM pin that is active LOW
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E27C_PGM_CE, // CE is pulsed low to program, CE HIGH for verify
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E27C_PGM_D13 // Program voltage pulse switched using Arduino D13 pin
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};
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class PromDevice27 : public PromDevice
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{
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public:
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PromDevice27(uint32_t size, E27C_PGM pgmType, unsigned long pulseWidthUsec,
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unsigned writeAttempts, unsigned overwriteMultiplier, bool verify=true);
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void begin();
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const char * getName() { return "27 series EPROM"; }
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ERET erase(uint32_t start, uint32_t end);
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bool is_readback_safe() { return mPgmType != E27C_PGM_CE; }
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protected:
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void setAddress(uint32_t address);
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byte readByte(uint32_t address);
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bool burnByte(byte value, uint32_t address);
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bool burnByteWE(byte value, uint32_t address);
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bool burnByteCE(byte value, uint32_t address);
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void myDelay(uint32_t us);
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E27C_PGM mPgmType;
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unsigned long mPulseWidthUsec;
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unsigned mWriteAttempts;
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unsigned mOverwriteMultiplier;
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bool mVerifyByte;
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};
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#endif // #define INCLUDE_PROM_DEVICE_27_H
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