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https://github.com/TomNisbet/TommyPROM.git
synced 2024-10-06 03:56:03 +00:00
update 27_CE algorithm for overwrite pulses
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7d40ea6705
commit
18bb15bec6
@ -130,7 +130,7 @@ bool PromDevice27::burnByteWE(byte value, uint32_t address)
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writeDataBus(value);
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delayMicroseconds(1);
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enableWrite();
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myDelay(mPulseWidthUsec * mOverwriteMultiplier);
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myDelay(mPulseWidthUsec * mOverwriteMultiplier * (writeCount + 1));
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disableWrite();
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}
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@ -179,7 +179,18 @@ bool PromDevice27::burnByteCE(byte value, uint32_t address)
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enableOutput();
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status = readDataBus() == value;
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disableOutput();
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}
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} else {
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status = true;
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}
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}
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if (status && (mOverwriteMultiplier > 0)) {
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setDataBusMode(OUTPUT);
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writeDataBus(value);
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delayMicroseconds(1);
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enableChip();
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myDelay(mPulseWidthUsec * mOverwriteMultiplier * (writeCount + 1));
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disableChip();
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}
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setDataBusMode(INPUT);
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@ -244,15 +255,15 @@ ERET PromDevice27::erase(uint32_t start, uint32_t end)
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}
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void PromDevice27::myDelay(unsigned int us)
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void PromDevice27::myDelay(uint32_t us)
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{
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if (us > 16000) {
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// The delayMicroseconds code can't do delays longer than 16ms, so use the
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// ms delay code for larger values. This rounds down to the nearest ms, so
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// it is not possible to delay for 40.5 ms, for example.
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delay(us / 1000);
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delay(uint16_t(us / 1000));
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} else {
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delayMicroseconds((unsigned int) us);
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delayMicroseconds(uint16_t(us));
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}
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}
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@ -50,7 +50,7 @@ class PromDevice27 : public PromDevice
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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(unsigned int us);
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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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@ -19,7 +19,7 @@
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#include "XModem.h"
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static const char * MY_VERSION = "3.6";
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static const char * MY_VERSION = "3.7";
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// Global status
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@ -49,6 +49,7 @@ PromDevice28C prom(32 * 1024L, 64, 10, true);
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//PromDevice27 prom(8 * 1024L, E27C_PGM_WE, 1000L, 15, 4); // 2764 with SEEQ intelligent programming
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//PromDevice27 prom(32 * 1024L, E27C_PGM_WE, 1000L, 25, 3); // 27C256 with SEEQ intelligent programming
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PromDevice27 prom(32 * 1024L, E27C_PGM_CE, 100L, 25, 0); // M27C256 with Presto II intelligent programming
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//PromDevice27 prom(32 * 1024L, E27C_PGM_CE, 1000L, 25, 3); // M27256 with fast programming
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//PromDevice27 prom(2 * 1024L, E27C_PGM_WE, 50000L, 1, 0); // 2716 with single 50ms write
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//PromDevice27 prom(512 * 1024L, E27C_PGM_CE, 100L, 11, 0); // 27C040 with Atmel rapid programming, CE connected to CE#/PGM#
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//PromDevice27 prom(32 * 1024L, E27C_PGM_CE, 100L, 25, 0); // W27C257/W27E257 with 100uS program pulse on CE
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@ -337,6 +338,7 @@ bool checkForBreak()
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word checksumBlock(uint32_t start, uint32_t end)
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{
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word checksum = 0;
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#if 1
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for (uint32_t addr = start; (addr <= end); addr += 2)
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{
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word w = prom.readData(addr);
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@ -344,6 +346,25 @@ word checksumBlock(uint32_t start, uint32_t end)
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w |= prom.readData(addr + 1);
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checksum += w;
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}
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#else
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uint16_t crc = 0xffff;
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for (uint32_t addr = start; (addr <= end); addr++)
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{
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crc = crc ^ (uint16_t(prom.readData(addr)) << 8);
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for (int ix = 0; (ix < 8); ix++)
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{
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if (crc & 0x8000)
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{
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crc = (crc << 1) ^ 0x1021;
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}
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else
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{
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crc <<= 1;
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}
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}
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}
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checksum = crc;
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#endif
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return checksum;
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}
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@ -30,3 +30,4 @@ exerpt: "What's New in TommyPROM"
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|3.4 |2024-04-09 |Support 2316,2332, and 2364 mask-programmed ROMs|
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|3.5 |2024-04-12 |jcranes's updates to CLI for better parameter defaults and additional error checking|
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|3.6 |2024-04-23 |Remove debug commands by default - can be enabled in Configure.h|
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|3.7 |2024-05-03 |Change overwrite algorithm for 27 series to match SEEQ and M27256 datasheets|
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