public static async Task UnlockAllRegionsAsync(this Samba nxt)
{
for (var i = 0; i < 16; i++)
{
await nxt.UnlockRegion(i);
}
}
static async Task LockAllRegionsAsync(this Samba nxt)
{
for (var i = 0; i < 16; i++)
{
await nxt.LockRegionAsync(i);
}
}
public static async Task FlashPrepareAsync(this Samba nxt)
{
// Put the clock in PLL/2 mode
await nxt.WriteWordAsync(0xFFFFFC30, 0x7);
// Unlock the flash chip
await nxt.UnlockAllRegionsAsync();
// Send the flash writing routine
await nxt.SendFileAsync(0x202000, Nxt.Flash.Bin);
}
static async Task FlashBlockAsync(this Samba nxt, uint blockNum, byte[] buf)
{
// Set the target block number
await nxt.WriteWordAsync(0x202300, blockNum);
// Send the block to flash
await nxt.SendFileAsync(0x202100, buf);
// Jump into the flash writing routine
await nxt.GoAsync(0x202000);
}
public static async Task WaitReadyAsync(this Samba nxt)
{
uint status;
do
{
status = await nxt.ReadWordAsync(0xFFFFFF68);
/* Bit 0 is the FRDY field. Set to 1 if the flash controller is
* ready to run a new command.
*/
} while ((status & 0x1) != 0x1);
}
static async Task AlterLockAsync(this Samba nxt, int regionNum, Commands cmd)
{
var w = 0x5A000000 | (uint)((64 * regionNum) << 8);
w += (uint)cmd;
await nxt.WaitReadyAsync();
/* Flash mode register: FCMN 0x5, FWS 0x1
* Flash command register: KEY 0x5A, FCMD = clear-lock-bit (0x4)
* Flash mode register: FCMN 0x34, FWS 0x1
*/
await nxt.WriteWordAsync(0xFFFFFF60, 0x00050100);
await nxt.WriteWordAsync(0xFFFFFF64, w);
await nxt.WriteWordAsync(0xFFFFFF60, 0x00340100);
}
public static async Task FlashAsync(this Samba nxt, byte[] data, IProgress <int> progress)
{
using (var f = new MemoryStream(data)) {
Validate(data);
await nxt.FlashPrepareAsync();
var buf = new byte[256];
for (var i = 0u; i < 1024; i++)
{
progress?.Report((int)i);
var ret = f.Read(buf, 0, buf.Length);
await nxt.FlashBlockAsync(i, buf);
if (ret < 256)
{
await nxt.FlashFinishAsync();
return;
}
}
}
await nxt.FlashFinishAsync();
}
static Task FlashFinishAsync(this Samba nxt)
{
return(nxt.WaitReadyAsync());
}
static Task UnlockRegion(this Samba nxt, int regionNum)
{
return(nxt.AlterLockAsync(regionNum, Commands.Unlock));
}
