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FLASH.c
76 lines (67 loc) · 3.14 KB
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FLASH.c
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/*
* FLASH.c
*
* Created on: Dec 29, 2020
* Author: b l
*/
#include "FLASH.h"
void FLASH_sendPasswords(enum FLASH_PROTECTION whichProtection, uword flashBaseAddress, uword password0, uword password1, uword whichUCB)
{
// Reset flash controller status
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x00F5;
// Send passwords to flash controller
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x00AA;
(*(volatile uword *) (flashBaseAddress + 0xAAA8)) = 0x0055;
(*(volatile uword *) (flashBaseAddress + 0x553C)) = whichUCB;
(*(volatile uword *) (flashBaseAddress + 0xAAA8)) = password0;
(*(volatile uword *) (flashBaseAddress + 0xAAA8)) = password1;
(*(volatile uword *) (flashBaseAddress + 0x5558)) = whichProtection;
__asm("nop");
__asm("nop");
__asm("nop");
}
void FLASH_eraseSector(FLASHn_FSR_t *flashFSR, uword flashBaseAddress, uword sectorBaseAddress)
{
// Reset flash controller status
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x00F5;
// Erase Sector
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x00AA;
(*(volatile uword *) (flashBaseAddress + 0xAAA8)) = 0x0055;
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x0080;
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x00AA;
(*(volatile uword *) (flashBaseAddress + 0xAAA8)) = 0x0055;
(*(volatile uword *) (sectorBaseAddress)) = 0x0030;
// Wait for FSR to become busy (valid)
while ((flashFSR->bits.PBUSY == 0) && (flashFSR->bits.D0BUSY == 0) && (flashFSR->bits.D1BUSY == 0));
// Wait for FSR to finish operation
while ((flashFSR->bits.PBUSY != 0) || (flashFSR->bits.D0BUSY != 0) || (flashFSR->bits.D1BUSY != 0));
}
void FLASH_writePage(FLASHn_FSR_t *flashFSR, uword flashBaseAddress, uword pageBaseAddress, ubyte dataArray[256]) {
// Reset flash controller status
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x00F5;
// Enter Assemble Page Mode
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x0050;
// Load Page Data 64 bits (8 bytes) at a time.
unsigned int i;
unsigned long long data = 0;
for (i = 0; i < 256; i += 8) {
data = (unsigned long long)dataArray[i] & 0xFF;
data += (unsigned long long)(dataArray[i + 1] & 0xFF) << 8;
data += (unsigned long long)(dataArray[i + 2] & 0xFF) << 16;
data += (unsigned long long)(dataArray[i + 3] & 0xFF) << 24;
data += (unsigned long long)(dataArray[i + 4] & 0xFF) << 32;
data += (unsigned long long)(dataArray[i + 5] & 0xFF) << 40;
data += (unsigned long long)(dataArray[i + 6] & 0xFF) << 48;
data += (unsigned long long)(dataArray[i + 7] & 0xFF) << 56;
(*(unsigned long long*) (flashBaseAddress + 0x55F0)) = data;
}
// Send Write Page Command
(*(volatile uword *) (flashBaseAddress + 0x5554)) = 0x00AA;
(*(volatile uword *) (flashBaseAddress + 0xAAA8)) = 0x0055;
(*(volatile unsigned long *) (flashBaseAddress + 0x5554)) = 0xA0;
(*(volatile unsigned long *) (pageBaseAddress)) = 0x00AA;
// Wait for busy state to set
while ((flashFSR->bits.PBUSY == 0) && (flashFSR->bits.D0BUSY == 0) && (flashFSR->bits.D1BUSY == 0));
// Now wait for busy state to clear (FSR to finish operation)
while ((flashFSR->bits.PBUSY != 0) || (flashFSR->bits.D0BUSY != 0) || (flashFSR->bits.D1BUSY != 0));
}