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Send the full page address on 2Gbit W25N devices #11916

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Send the full page address on 2Gbit W25N devices #11916

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5 changes: 4 additions & 1 deletion src/main/drivers/flash_w25n.c
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Original file line number Diff line number Diff line change
Expand Up @@ -160,7 +160,10 @@ static void w25n_performOneByteCommand(uint8_t command)

static void w25n_performCommandWithPageAddress(uint8_t command, uint32_t pageAddress)
{
uint8_t cmd[4] = { command, 0, (pageAddress >> 8) & 0xff, (pageAddress >> 0) & 0xff};
// The 2Gbit devices have 2048 blocks of 64 pages, so their page address needs 17 bits.
// Its most significant bit is the lowest bit of the first address byte, which is a don't
// care on the 1Gbit W25N01GV where the page address never exceeds 16 bits.
uint8_t cmd[4] = { command, (pageAddress >> 16) & 0xff, (pageAddress >> 8) & 0xff, (pageAddress >> 0) & 0xff};
busTransfer(busDev, NULL, cmd, sizeof(cmd));
}

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