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[ion/device] External flash erase routines

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This commit is contained in:
Ruben Dashyan
2018-11-28 18:09:30 +01:00
committed by Romain Goyet
parent 5d62ef933a
commit fc6aede57f
2 changed files with 25 additions and 7 deletions
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17
ion/src/device/external_flash.cpp
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@@ -178,7 +178,7 @@ void initQSPI() {
// Enable QUADSPI AHB3 peripheral clocks
RCC.AHB3ENR()->setQSPIEN(true);
// Configure controller for target device
QUADSPI.DCR()->setFSIZE(FlashNumberOfAddressBits-1);
QUADSPI.DCR()->setFSIZE(NumberOfAddressBitsInChip - 1);
QUADSPI.DCR()->setCSHT(7); // Highest value. TODO: make it optimal
QUADSPI.CR()->setPRESCALER(255); // Highest value. TODO: make it optimal
@@ -202,16 +202,27 @@ void initChip() {
set_as_memory_mapped();
}
int SectorAtAddress(uint32_t address) {
int i = address >> NumberOfAddressBitsIn64KbyteBlock;
if (i >= NumberOfSectors) {
return -1;
}
return i;
}
void MassErase() {
send_command(Command::WriteEnable);
wait();
send_command(Command::ChipErase);
wait();
set_as_memory_mapped();
}
void EraseSector() {
void EraseSector(int i) {
assert(i >= 0 && i < NumberOfSectors);
send_command(Command::WriteEnable);
//send_command(Command::BlockErase /* PICK SIZE */, addressOfSector);
wait();
send_write_command(Command::Erase64KbyteBlock, reinterpret_cast<uint8_t *>(i << NumberOfAddressBitsIn64KbyteBlock), nullptr, 0);
wait();
set_as_memory_mapped();
}

15
ion/src/device/external_flash.h
View File

@@ -40,7 +40,11 @@ void initQSPI();
void initChip();
void MassErase();
void EraseSector(int sector);
constexpr int NumberOfSectors = 128;
int SectorAtAddress(uint32_t address);
void EraseSector(int i);
void WriteMemory(uint8_t * source, uint8_t * destination, size_t length);
enum class Command : uint8_t {
@@ -53,12 +57,15 @@ enum class Command : uint8_t {
PageProgram = 0x02,
QuadPageProgram = 0x33,
EnableQPI = 0x38,
ChipErase = 0xC7
// Erase the whole chip or a 64-Kbyte block as being "1"
ChipErase = 0xC7,
Erase64KbyteBlock = 0xD8,
};
constexpr static uint32_t QSPIBaseAddress = 0x90000000;
constexpr static uint8_t FlashNumberOfAddressBits = 23;
constexpr static uint32_t FlashAddressSpaceSize = 1 << FlashNumberOfAddressBits;
constexpr static uint8_t NumberOfAddressBitsInChip = 23;
constexpr static uint8_t NumberOfAddressBitsIn64KbyteBlock = 16;
constexpr static uint32_t FlashAddressSpaceSize = 1 << NumberOfAddressBitsInChip;
constexpr static GPIOPin QSPIPins[] = {
GPIOPin(GPIOB, 2), GPIOPin(GPIOB, 6), GPIOPin(GPIOC, 9), GPIOPin(GPIOD,12),