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3f5e3ddffc
This way we can easily check with 'diff' for differences in our code and Atmel softpack. Also, this layout is more suitable for building various different firmware images (e.g. factory-test, dfu-loader, main application) for a variety of different boards (simtrace, owhw, qmod).
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
#include "chip.h"
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#define EFC_FCMD_STUI 0x0E
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#define EFC_FCMD_SPUI 0x0F
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__attribute__ ((section(".ramfunc")))
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void EEFC_ReadUniqueID(unsigned int *pdwUniqueID)
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{
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unsigned int status;
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/* Errata / Workaround: Set bit 16 of EEFC Flash Mode Register
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* to 1 */
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EFC->EEFC_FMR |= (1 << 16);
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/* Send the Start Read unique Identifier command (STUI) by
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* writing the Flash Command Register with the STUI command. */
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EFC->EEFC_FCR = (0x5A << 24) | EFC_FCMD_STUI;
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/* Wait for the FRDY bit to fall */
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do {
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status = EFC->EEFC_FSR;
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} while ((status & EEFC_FSR_FRDY) == EEFC_FSR_FRDY);
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/* The Unique Identifier is located in the first 128 bits of the
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* Flash memory mapping. So, at the address 0x400000-0x400003.
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* */
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pdwUniqueID[0] = *(uint32_t *) IFLASH_ADDR;
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pdwUniqueID[1] = *(uint32_t *) (IFLASH_ADDR + 4);
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pdwUniqueID[2] = *(uint32_t *) (IFLASH_ADDR + 8);
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pdwUniqueID[3] = *(uint32_t *) (IFLASH_ADDR + 12);
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/* To stop the Unique Identifier mode, the user needs to send
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* the Stop Read unique Identifier command (SPUI) by writing the
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* Flash Command Register with the SPUI command. */
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EFC->EEFC_FCR = (0x5A << 24) | EFC_FCMD_SPUI;
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/* When the Stop read Unique Unique Identifier command (SPUI)
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* has been performed, the FRDY bit in the Flash Programming
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* Status Register (EEFC_FSR) rises. */
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do {
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status = EFC->EEFC_FSR;
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} while ((status & EEFC_FSR_FRDY) != EEFC_FSR_FRDY);
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}
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