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81b3d28ffb
...
a113d4da0d
@ -141,112 +141,32 @@ void ParallelFlash_EraseChips(uint8_t chipsMask)
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* @param address The start address to erase (must be aligned to a sector boundary)
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* @param length The number of bytes to erase (must be aligned to a sector boundary)
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* @param chipsMask The mask of which chips to erase
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* @param numEraseSectorGroups The number of erase sector groups we know about
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* @param eraseSectorGroups The erase sector groups
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* @return True on success, false on failure
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*/
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bool ParallelFlash_EraseSectors(uint32_t address, uint32_t length, uint8_t chipsMask, uint8_t numEraseSectorGroups, ParallelFlashEraseSectorGroup const *eraseSectorGroups)
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bool ParallelFlash_EraseSectors(uint32_t address, uint32_t length, uint8_t chipsMask)
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{
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// Choose a default sector group if we don't have the info
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static const ParallelFlashEraseSectorGroup defaultSST39SF040Sectors[] = {
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{0xFFFFFFFFUL, SECTOR_SIZE_SST39SF040}
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};
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static const ParallelFlashEraseSectorGroup defaultM29F160FBSectors[] = {
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{1, 0x4000},
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{2, 0x2000},
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{1, 0x8000},
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{0xFFFFFFFFUL, SECTOR_SIZE_M29F160FB5AN6E2_8}
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};
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// If we don't know the sector info (older programmer or unknown chips)
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// then fall back to the previous hardcoded sector maps.
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// Note that "chip type" isn't really accurate anymore; this is more about
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// whether or not it has shifted unlock addresses. But these are the hardcoded
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// defaults that seemed to work okay for people previously.
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if (numEraseSectorGroups == 0)
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{
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switch (curChipType)
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{
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case ParallelFlash_SST39SF040_x4:
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default:
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eraseSectorGroups = defaultSST39SF040Sectors;
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numEraseSectorGroups = sizeof(defaultSST39SF040Sectors)/sizeof(defaultSST39SF040Sectors[0]);
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break;
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case ParallelFlash_M29F160FB5AN6E2_x4:
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eraseSectorGroups = defaultM29F160FBSectors;
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numEraseSectorGroups = sizeof(defaultM29F160FBSectors)/sizeof(defaultM29F160FBSectors[0]);
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break;
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}
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}
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bool result = false;
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// The first sector group and index in that group to erase
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uint32_t firstSectorGroup = 0;
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uint32_t firstSectorInGroup = 0;
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// Temporary counters for matching up sector locations
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uint32_t curSectorGroup = 0;
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uint32_t curSectorInGroup = 0;
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// Find the first sector we need to erase. Keep searching until we've
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// 1) found it or gone past it, or
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// 2) exhausted our list of erase sector groups
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uint32_t curAddress = 0;
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while (curAddress < address &&
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curSectorGroup < numEraseSectorGroups)
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// Figure out our sector size
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uint32_t sectorSize;
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switch (curChipType)
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{
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curAddress += eraseSectorGroups[curSectorGroup].size;
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curSectorInGroup++;
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if (curSectorInGroup >= eraseSectorGroups[curSectorGroup].count)
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{
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curSectorGroup++;
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curSectorInGroup = 0;
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}
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case ParallelFlash_SST39SF040_x4:
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default:
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sectorSize = SECTOR_SIZE_SST39SF040;
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break;
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case ParallelFlash_M29F160FB5AN6E2_x4:
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sectorSize = SECTOR_SIZE_M29F160FB5AN6E2_8;
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break;
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}
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// If the start address wasn't on a sector boundary, bail
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if (curAddress != address)
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// Make sure the area requested to be erased is on good boundaries
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if ((address % sectorSize) ||
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(length % sectorSize))
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{
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return false;
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}
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// OK, we've found our first sector to erase.
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firstSectorGroup = curSectorGroup;
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firstSectorInGroup = curSectorInGroup;
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// Now, locate our last sector to erase.
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uint32_t curLength = 0;
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while (curLength < length &&
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curSectorGroup < numEraseSectorGroups)
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{
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curLength += eraseSectorGroups[curSectorGroup].size;
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// If we still haven't handled the entire requested space,
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// go to the next sector
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if (curLength < length)
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{
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curSectorInGroup++;
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if (curSectorInGroup >= eraseSectorGroups[curSectorGroup].count)
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{
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curSectorGroup++;
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curSectorInGroup = 0;
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}
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}
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}
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// If the length wasn't on a sector boundary, bail
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if (curLength != length)
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{
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return false;
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}
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// We've now verified that everything is on a sector boundary, so we can
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// go ahead with the erase operation!
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curSectorGroup = firstSectorGroup;
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curSectorInGroup = firstSectorInGroup;
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// We're good to go. Let's do it. The process varies based on the chip type
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if (curChipType == ParallelFlash_SST39SF040_x4)
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{
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@ -264,15 +184,8 @@ bool ParallelFlash_EraseSectors(uint32_t address, uint32_t length, uint8_t chips
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// unlock sequence has to be done again after this sector is done.
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ParallelBus_WriteCycle(address, 0x30303030UL);
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// Move our counters in preparation for the next sector
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address += eraseSectorGroups[curSectorGroup].size;
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length -= eraseSectorGroups[curSectorGroup].size;
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curSectorInGroup++;
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if (curSectorInGroup >= eraseSectorGroups[curSectorGroup].count)
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{
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curSectorGroup++;
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curSectorInGroup = 0;
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}
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address += sectorSize;
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length -= sectorSize;
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// Wait for completion of this individual erase operation before
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// we can start a new erase operation.
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@ -290,19 +203,25 @@ bool ParallelFlash_EraseSectors(uint32_t address, uint32_t length, uint8_t chips
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ParallelBus_WriteCycle(ParallelFlash_UnlockAddress1(), 0x80808080UL);
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ParallelFlash_UnlockChips(chipsMask);
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// Now provide as many sector addresses as needed to erase.
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// The first address is a bit of a special case because the boot sector
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// actually has finer granularity for sector sizes.
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if (address == 0)
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{
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ParallelBus_WriteCycle(0x00000000UL, 0x30303030UL);
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ParallelBus_WriteCycle(0x00004000UL, 0x30303030UL);
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ParallelBus_WriteCycle(0x00006000UL, 0x30303030UL);
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ParallelBus_WriteCycle(0x00008000UL, 0x30303030UL);
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address += sectorSize;
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length -= sectorSize;
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}
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// The remaining sectors can use a more generic algorithm
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while (length)
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{
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ParallelBus_WriteCycle(address, 0x30303030UL);
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// Move our counters in preparation for the next sector
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address += eraseSectorGroups[curSectorGroup].size;
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length -= eraseSectorGroups[curSectorGroup].size;
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curSectorInGroup++;
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if (curSectorInGroup >= eraseSectorGroups[curSectorGroup].count)
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{
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curSectorGroup++;
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curSectorInGroup = 0;
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}
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address += sectorSize;
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length -= sectorSize;
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}
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// Wait for completion of the entire erase operation
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@ -312,6 +231,7 @@ bool ParallelFlash_EraseSectors(uint32_t address, uint32_t length, uint8_t chips
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}
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return result;
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}
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/** Writes a buffer of data to all 4 chips simultaneously
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@ -55,13 +55,6 @@ typedef enum ParallelFlashChipType
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ParallelFlash_M29F160FB5AN6E2_x4,
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} ParallelFlashChipType;
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/// Struct representing a group of identical erase sectors
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typedef struct ParallelFlashEraseSectorGroup
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{
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uint32_t count;
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uint32_t size;
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} ParallelFlashEraseSectorGroup;
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// Tells which type of flash chip we are communicating with
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void ParallelFlash_SetChipType(ParallelFlashChipType type);
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ParallelFlashChipType ParallelFlash_ChipType(void);
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@ -77,7 +70,7 @@ void ParallelFlash_IdentifyChips(ParallelFlashChipID *chips);
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// Erases the chips/sectors requested
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void ParallelFlash_EraseChips(uint8_t chipsMask);
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bool ParallelFlash_EraseSectors(uint32_t address, uint32_t length, uint8_t chipsMask, uint8_t numEraseSectorGroups, ParallelFlashEraseSectorGroup const *eraseSectorGroups);
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bool ParallelFlash_EraseSectors(uint32_t address, uint32_t length, uint8_t chipsMask);
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// Writes a buffer to all 4 chips simultaneously (each uint32_t contains an 8-bit portion for each chip).
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// Optimized variant of this function if we know we're writing to all 4 chips simultaneously.
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@ -47,9 +47,7 @@ typedef enum ProgrammerCommand
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ErasePortion,
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WriteChipsAt,
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ReadChipsAt,
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SetChipsMask,
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SetSectorLayout,
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GetFirmwareVersion
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SetChipsMask
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} ProgrammerCommand;
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// After a command is sent, the programmer will always respond with
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@ -187,15 +185,4 @@ typedef enum ProgrammerErasePortionOfChipReply
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ProgrammerErasePortionFinished
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} ProgrammerErasePortionOfChipReply;
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// ------------------------- GET FIRMWARE VERSION PROTOCOL -------------------------
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// If the command is GetFirmwareVersion, the programmer will reply CommandReplyOK.
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// Next, it will return 4 bytes: major version, minor version, revision, and a final
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// byte where 0 means it's a normal version and 1 means it's a prerelease version.
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// Other values are reserved.
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// Finally, it will finish the response with ProgrammerGetFWVersionDone.
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typedef enum ProgrammerGetFWVersionReply
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{
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ProgrammerGetFWVersionDone
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} ProgrammerGetFWVersionReply;
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#endif /* PROGRAMMER_PROTOCOL_H_ */
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@ -30,7 +30,6 @@
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#include "led.h"
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#include "hardware.h"
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#include <stdbool.h>
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#include <string.h>
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/// Maximum size of an individual chip on a SIMM we read
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#define MAX_CHIP_SIZE (2UL * 1024UL * 1024UL)
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@ -40,20 +39,8 @@
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#if ((READ_WRITE_CHUNK_SIZE_BYTES % 4) != 0)
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#error Read/write chunk size should be a multiple of 4 bytes
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#endif
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/// The maximum number of erase groups we deal with
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#define MAX_ERASE_SECTOR_GROUPS 10
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/// Version info to respond with
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#define VERSION_MAJOR 1
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#define VERSION_MINOR 5
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#define VERSION_REVISION 0
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/// The number of erase sector groups we know about currently.
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/// If it's zero, we don't know, so fall back to defaults.
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static uint8_t numEraseSectorGroups = 0;
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/// The erase sector groups that we will pass to the programmer
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static ParallelFlashEraseSectorGroup eraseSectorGroups[MAX_ERASE_SECTOR_GROUPS];
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/// The smallest granularity for sector erase that we support
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#define ERASE_SECTOR_SIZE_BYTES (256UL * 1024UL)
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/// Internal state so we know how to interpret the next-received byte
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typedef enum ProgrammerCommandState
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@ -66,7 +53,6 @@ typedef enum ProgrammerCommandState
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ReadingChipsReadStartPos, //!< Reading the start position for reading data from the SIMM
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WritingChipsReadingStartPos, //!< Reading the start position for writing data to the SIMM
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ReadingChipsMask, //!< Reading the bitmask of which chips should be programmed
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ReadingSectorLayout, //!< Reading the erase sector layout
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} ProgrammerCommandState;
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static ProgrammerCommandState curCommandState = WaitingForCommand;
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@ -99,7 +85,6 @@ static void SIMMProgrammer_HandleErasePortionReadPosLengthByte(uint8_t byte);
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static void SIMMProgrammer_HandleReadingChipsReadStartPosByte(uint8_t byte);
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static void SIMMProgrammer_HandleWritingChipsReadingStartPosByte(uint8_t byte);
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static void SIMMProgrammer_HandleReadingChipsMaskByte(uint8_t byte);
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static void SIMMProgrammer_HandleReadingSectorLayoutByte(uint8_t byte);
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/** Initializes the SIMM programmer and prepares it for USB communication.
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*
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@ -148,9 +133,6 @@ void SIMMProgrammer_Check(void)
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case ReadingChipsMask:
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SIMMProgrammer_HandleReadingChipsMaskByte(recvByte);
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break;
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case ReadingSectorLayout:
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SIMMProgrammer_HandleReadingSectorLayoutByte(recvByte);
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break;
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}
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}
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@ -283,18 +265,6 @@ static void SIMMProgrammer_HandleWaitingForCommandByte(uint8_t byte)
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curCommandState = ReadingChipsMask;
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USBCDC_SendByte(CommandReplyOK);
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break;
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case SetSectorLayout:
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curCommandState = ReadingSectorLayout;
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USBCDC_SendByte(CommandReplyOK);
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break;
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case GetFirmwareVersion:
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USBCDC_SendByte(CommandReplyOK);
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USBCDC_SendByte(VERSION_MAJOR);
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USBCDC_SendByte(VERSION_MINOR);
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USBCDC_SendByte(VERSION_REVISION);
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USBCDC_SendByte(0);
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USBCDC_SendByte(ProgrammerGetFWVersionDone);
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break;
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// We don't know what this command is, so reply that it was invalid.
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default:
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USBCDC_SendByte(CommandReplyInvalid);
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@ -554,28 +524,44 @@ static void SIMMProgrammer_HandleErasePortionReadPosLengthByte(uint8_t byte)
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if (++readLengthByteIndex >= 8)
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{
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ParallelFlashChipType chipType = ParallelFlash_ChipType();
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bool eraseSuccess = false;
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// Ensure the position and length are a multiple of 4 so that the division by 4
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// won't confuse anything.
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if (((erasePosition % 4) == 0) &&
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((eraseLength % 4) == 0))
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// Ensure they are both within limits of sector size erasure
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if (((erasePosition % ERASE_SECTOR_SIZE_BYTES) == 0) &&
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((eraseLength % ERASE_SECTOR_SIZE_BYTES) == 0))
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{
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uint32_t boundary = eraseLength + erasePosition;
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// Ensure they are within the limits of our addressable length too.
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// We can't address more than 8 MB of data at a time.
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if (boundary <= (8 * 1024UL * 1024UL))
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// Ensure they are within the limits of the chip size too
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if (chipType == ParallelFlash_SST39SF040_x4)
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{
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// OK! We're erasing certain sectors of a SIMM.
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USBCDC_SendByte(ProgrammerErasePortionOK);
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// Send the response immediately, it could take a while.
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USBCDC_Flush();
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if (ParallelFlash_EraseSectors(erasePosition/PARALLEL_FLASH_NUM_CHIPS,
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eraseLength/PARALLEL_FLASH_NUM_CHIPS, chipsMask,
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numEraseSectorGroups, eraseSectorGroups))
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if (boundary <= (8 * 1024UL * 1024UL))
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{
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eraseSuccess = true;
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// OK! We're erasing certain sectors of a SIMM.
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USBCDC_SendByte(ProgrammerErasePortionOK);
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// Send the response immediately, it could take a while.
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USBCDC_Flush();
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if (ParallelFlash_EraseSectors(erasePosition/PARALLEL_FLASH_NUM_CHIPS,
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eraseLength/PARALLEL_FLASH_NUM_CHIPS, chipsMask))
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{
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eraseSuccess = true;
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}
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}
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}
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else if (chipType == ParallelFlash_M29F160FB5AN6E2_x4)
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{
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if (boundary <= (8 * 1024UL * 1024UL))
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{
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// OK! We're erasing certain sectors of a SIMM.
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USBCDC_SendByte(ProgrammerErasePortionOK);
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// Send the response immediately, it could take a while.
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USBCDC_Flush();
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if (ParallelFlash_EraseSectors(erasePosition/PARALLEL_FLASH_NUM_CHIPS,
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eraseLength/PARALLEL_FLASH_NUM_CHIPS, chipsMask))
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{
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eraseSuccess = true;
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}
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}
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}
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}
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@ -661,57 +647,3 @@ static void SIMMProgrammer_HandleReadingChipsMaskByte(uint8_t byte)
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// Done either way; now we're waiting for a command to arrive
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curCommandState = WaitingForCommand;
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}
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/** Handles a received byte when we are reading in the sector layout
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*
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* @param byte The received byte, which is the first sector layout byte
|
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*/
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static void SIMMProgrammer_HandleReadingSectorLayoutByte(uint8_t byte)
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{
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numEraseSectorGroups = 0;
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uint32_t sectorCount = byte;
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uint32_t sectorSize = 0;
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int byteIndex = 1;
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while (1)
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{
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// Read in the sector size
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for (int i = byteIndex; i < 4; i++)
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{
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uint32_t nextByte = (uint32_t)USBCDC_ReadByteBlocking();
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sectorCount |= nextByte << (i * 8);
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}
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// From now on, we loop over 4 bytes, not 3
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byteIndex = 0;
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// If we read in a count of 0, we're done!
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if (sectorCount == 0)
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{
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break;
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}
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// We have a nonzero count, so read in the size now
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for (int i = 0; i < 4; i++)
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{
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uint32_t nextByte = (uint32_t)USBCDC_ReadByteBlocking();
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sectorSize |= nextByte << (i * 8);
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}
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// If we have room to store it in the array, do it
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if (numEraseSectorGroups < MAX_ERASE_SECTOR_GROUPS)
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{
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eraseSectorGroups[numEraseSectorGroups].count = sectorCount;
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eraseSectorGroups[numEraseSectorGroups].size = sectorSize;
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numEraseSectorGroups++;
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}
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// Now read in the next chunk of data
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sectorCount = 0;
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sectorSize = 0;
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}
|
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|
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// We got the list. Done!
|
||||
USBCDC_SendByte(CommandReplyOK);
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curCommandState = WaitingForCommand;
|
||||
}
|
||||
|
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