static void _readMemory(int handle, ushort addr, ushort length)
{
int count;
int i;
byte[] data_in = new byte[length + 3];
for (int j = 0; j < length + 3; j++)
{
data_in[j] = 0;
}
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
// Queue the read command, address, and data
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0x03);
CheetahApi.ch_spi_queue_byte(handle, 1, (byte)((addr >> 8) & 0xff));
CheetahApi.ch_spi_queue_byte(handle, 1, (byte)((addr >> 0) & 0xff));
CheetahApi.ch_spi_queue_byte(handle, length, 0x00);
CheetahApi.ch_spi_queue_ss(handle, 0);
count = CheetahApi.ch_spi_batch_shift(handle, length + 3, data_in);
if (count < 0)
{
Console.Write("error: {0:s}\n",
CheetahApi.ch_status_string(count));
}
else if (count != length + 3)
{
Console.Write("error: read {0:d} bytes (expected {1:d})\n",
count - 3, length);
}
// Dump the data to the screen
Console.Write("\nData read from device:");
for (i = 0; i < length; ++i)
{
if ((i & 0x0f) == 0)
{
Console.Write("\n{0:x4}: ", addr + i);
}
Console.Write("{0:x2} ", data_in[i + 3] & 0xff);
if (((i + 1) & 0x07) == 0)
{
Console.Write(" ");
}
}
Console.Write("\n");
Console.Out.Flush();
}
/*=====================================================================
| FUNCTIONS
| ====================================================================*/
static void _blast(int handle, int length)
{
double elapsed;
ulong start = _timeMillis();
// Queue the read sequence
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
int delay = 0;
int j;
for (j = 0; j < length; ++j)
{
CheetahApi.ch_spi_queue_byte(handle, 1, (byte)(j & 0xff));
delay = CheetahApi.ch_spi_queue_delay_ns(handle, BYTE_DELAY);
}
Console.Write("Queued delay of {0:d} ns between bytes.\n", delay);
Console.Out.Flush();
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_oe(handle, 0);
elapsed = ((double)(_timeMillis() - start)) / 1000;
Console.Write("Took {0:f2} seconds to queue the batch.\n", elapsed);
Console.Out.Flush();
// Perform the shift
int batch = CheetahApi.ch_spi_batch_length(handle);
byte[] data_in = new byte[batch];
start = _timeMillis();
int count = CheetahApi.ch_spi_batch_shift(handle, batch, data_in);
elapsed = ((double)(_timeMillis() - start)) / 1000;
Console.Write("Took {0:f2} seconds to shift the batch.\n", elapsed);
Console.Out.Flush();
if (count != batch)
{
Console.Write("Expected {0:d} bytes but only received {1:d} " +
"bytes\n", batch, count);
}
if (SHOW_DATA)
{
// Output the data to the screen
Console.Write("\nData:");
int i;
for (i = 0; i < length; ++i)
{
if ((i & 0x07) == 0)
{
Console.Write("\n{0:x4}: ", i);
}
Console.Write("{0:x2}/{1:x2} ", (i & 0xff), data_in[i]);
}
Console.Write("\n");
Console.Out.Flush();
}
}
static int _read(int handle, int addr, int length, out byte[] data_in)
{
// Convert address and length from KB to bytes
addr *= 1024;
length *= 1024;
// Create the buffer to receive the flash values into.
data_in = new byte[length];
for (int j = 0; j < length; j++)
{
data_in[j] = 0;
}
byte[] noresult = new byte[1];
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
// Set slave select to deasserted state, in case it was left
// low by a previously interrupted transaction (ctrl-c). This
// will reset the state machine inside the flash.
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_ss(handle, 1);
// Queue fast read command code.
CheetahApi.ch_spi_queue_byte(handle, 1, 0x0b);
// Queue 3 bytes of address.
CheetahApi.ch_spi_queue_byte(handle, 1, (byte)(addr >> 16));
CheetahApi.ch_spi_queue_byte(handle, 1, (byte)(addr >> 8));
CheetahApi.ch_spi_queue_byte(handle, 1, (byte)(addr >> 0));
// Queue dummy byte.
CheetahApi.ch_spi_queue_byte(handle, 1, 0);
// Shift the queued fast read command.
int count = CheetahApi.ch_spi_batch_shift(handle, 0, data_in);
if (count != 5)
{
Console.Error.Write("Expected 5 bytes from initial shift\n");
return(1);
}
// Read the data.
// Set the value to send while reading the flash.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_byte(handle, length, 0x00);
count = CheetahApi.ch_spi_batch_shift(handle, length, data_in);
if (count != length)
{
Console.Error.Write("Expected {0:d} bytes from read shift " +
"(got {1:d})\n", length, count);
return(1);
}
// Dump the data to the screen
//int i;
//Console.Write("\nData read from device:");
//for (i=0; i < length; ++i) {
// if ((i&0x0f) == 0) Console.Write("\n{0:x4}: ", addr+i);
// Console.Write("{0:x2} ", data_in[i] & 0xff);
// if (((i+1)&0x07) == 0) Console.Write(" ");
//}
//Console.Write("\n");
//Console.Out.Flush();
// Clear the state of the bus.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_oe(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
return(0);
}
static int _verify(int handle, int length, int blocksize)
{
if (length == 0 || blocksize == 0)
{
return(2);
}
byte[] noresult = new byte[1];
int iter = (length - 1) / blocksize + 1;
// Create the buffer to receive the flash values into.
byte[] data_in = new byte[blocksize];
for (int j = 0; j < blocksize; j++)
{
data_in[j] = 0;
}
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
// Set slave select to deasserted state, in case it was left
// low by a previously interrupted transaction (ctrl-c). This
// will reset the state machine inside the flash.
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_ss(handle, 1);
// Queue fast read command code.
CheetahApi.ch_spi_queue_byte(handle, 1, 0x0b);
// Queue 3 bytes of address.
CheetahApi.ch_spi_queue_byte(handle, 1, 0);
CheetahApi.ch_spi_queue_byte(handle, 1, 0);
CheetahApi.ch_spi_queue_byte(handle, 1, 0);
// Queue dummy byte.
CheetahApi.ch_spi_queue_byte(handle, 1, 0);
// Shift the queued fast read command.
int count = CheetahApi.ch_spi_batch_shift(handle, 5, data_in);
if (count != 5)
{
Console.Write("Expected 5 bytes from initial shift\n");
return(1);
}
// Set the value to send while reading the flash.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_byte(handle, blocksize, 0x00);
int i;
ulong start = _timeMicroseconds();
// Variables for the integrity check.
uint integrity_counter = 0;
int integrity_errors = 0;
int integrity_nb = 0;
_printProgress(0, 0, 0, blocksize);
// Read one block at a time.
for (i = 0; i < iter; ++i)
{
// Read the next block of data.
count = CheetahApi.ch_spi_batch_shift(handle, blocksize,
data_in);
if (count != blocksize)
{
Console.Write("Expected {0:d} bytes from block shift " +
"(got {1:d})\n",
blocksize, count);
break;
}
// Check if the data in the flash matches a predefined
// sequence. Namely, there should be a running 32 bit
// counter in the data.
int j = 0;
while (integrity_nb < INTEGRITY_CHECK_NUM_BYTES && j < count)
{
uint val = (uint)((data_in[j + 0] << 24) |
(data_in[j + 1] << 16) |
(data_in[j + 2] << 8) |
(data_in[j + 3] << 0));
if (val != integrity_counter % INTEGRITY_LOOP_SIZE)
{
++integrity_errors;
}
++integrity_counter;
integrity_nb += 4;
j += 4;
}
// Print out the progress.
ulong currTime = _timeMicroseconds();
_printProgress((i + 1) * 100 / iter,
((double)(currTime - start)) / 1000000,
i, blocksize);
}
// Clear the state of the flash.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_oe(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
Console.Out.Flush();
Console.Error.Write("\nThere were {0:d} data errors.\n",
integrity_errors);
return((integrity_errors != 0) ? 2 : 0);
}
//suppose this is the block erase function,sector size is 4k ,block size is 32k/64k
//command d8 is block erase command
static int _erase(int handle, int sector, int num)
{
byte[] noresult = new byte[1];
// Reset the state of the bus.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_oe(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
int eraseAll = 0;
if (sector == 0 && num == 2048)
{
eraseAll = 1;
}
String str;
if (eraseAll != 0)
{
str = "Bulk";
}
else
{
str = "Block";
}
while (num != 0)
{
// Make sure the sector is a valid one.
if (sector < 0 || sector > 2047)
{
break;
}
int addr = sector << 12;
if (eraseAll == 0)
{
Console.Write("Erasing sector {0:d2} (bytes 0x{1:x6} " +
"to 0x{2:x6})...\n",
sector, addr, addr | 0xfff);
Console.Out.Flush();
}
else
{
Console.Write("Erasing entire device...\n");
Console.Out.Flush();
}
// Start the erase sequence.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
// Queue the write enable instruction for the flash.
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0x06);
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
if (eraseAll == 0)
{
// Queue the sector erase command.
CheetahApi.ch_spi_queue_byte(handle, 1, 0x20);
CheetahApi.ch_spi_queue_byte(handle, 1,
(byte)((addr >> 16) & 0xff));
CheetahApi.ch_spi_queue_byte(handle, 1,
(byte)((addr >> 8) & 0xff));
CheetahApi.ch_spi_queue_byte(handle, 1,
(byte)((addr >> 0) & 0xff));
}
else
{
// Queue the chip erase command.
CheetahApi.ch_spi_queue_byte(handle, 1, 0xc7);
}
CheetahApi.ch_spi_queue_ss(handle, 0);
// Shift the queued commands. (Don't need the data back.)
int batch = CheetahApi.ch_spi_batch_length(handle);
int count = CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
if (count != batch)
{
Console.Write("Expected {0:d} bytes but only received " +
"{1:d} bytes\n", batch, count);
return(1);
}
ulong start = _timeMicroseconds();
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0x05);
CheetahApi.ch_spi_queue_byte(handle, 1, 0x00);
CheetahApi.ch_spi_queue_ss(handle, 0);
while (true)
{
CheetahApi.ch_sleep_ms(10);
byte[] status_in = new byte[2];
CheetahApi.ch_spi_batch_shift(handle, 2, status_in);
if ((status_in[1] & 0x01) == 0)
{
break;
}
}
ulong end = _timeMicroseconds();
Console.Write("{0:s} erase took {1:f3} seconds\n",
str, (double)(end - start) / 1000000);
Console.Out.Flush();
if (eraseAll == 0)
{
++sector;
--num;
}
else
{
sector += 64;
num = 0;
}
}
// Reset the state of the bus.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
return(0);
}
static int _write(int handle, int addr, string binfile)
{
ulong start = _timeMicroseconds();
//Read bin file
BinaryReader br;
try
{
br = new BinaryReader(new FileStream(binfile,
FileMode.Open));
}
catch (IOException e)
{
Console.WriteLine(e.Message + "\n Cannot open file.");
return(-1);
}
int data_length = Convert.ToInt32(br.BaseStream.Length);
int data_pad_length = 1024 - data_length % 1024;
byte[] bin_data = new byte[data_length];
bin_data = br.ReadBytes(data_length);
byte[] data = new byte[data_length + data_pad_length];
byte[] data_in = new byte[data_length + data_pad_length];;
int addr_back = addr;
bin_data.CopyTo(data, 0);
if (data_pad_length != 0)
{
for (int i = 0; i < data_pad_length; i++)
{
data[data_length + i] = (byte)(255);
}
}
br.Close();
//Upate data_length to data_length + data_pad_length
data_length = data_length + data_pad_length;
// Buffer for outgoing data.
byte[] data_page = new byte[4 + PAGE_SIZE];
byte[] noresult = new byte[1];
byte[] data_back = new byte[5];
//Erase first
_erase(handle, addr / 4, (data.Length / (4 * 1024)) + 1);
// Reset the state of the bus.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_oe(handle, 1);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
// Convert address and length from KB to bytes
addr *= 1024;
// Set the starting counter based on the address.
int val = addr / 4;
int pages = 0;
int retry = 0;
while (data_length != 0)
{
// Start the write sequence.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
// Send PAGE_WRITE_BATCH_SIZE number of pages to the Cheetah per
// batch shift. Here we only program one page each batch
for (int i = 0; i < PAGE_WRITE_BATCH_SIZE; i++)
{
// Check if we've reached the end.
if (data_length == 0)
{
break;
}
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0x06);
CheetahApi.ch_spi_queue_ss(handle, 0);
//while (((data_back[0]>>1 & 0x01) != 1) && (retry++ < 100) ) {
// // Queue the write enable instruction for the flash.
// //Write enable command 0x06
// CheetahApi.ch_spi_queue_ss(handle, 0x1);
// CheetahApi.ch_spi_queue_byte(handle, 1, 0x06);
// CheetahApi.ch_spi_queue_ss(handle, 0);
// CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
// CheetahApi.ch_spi_queue_clear(handle);
// //Send RDSR Command check WEL bit = 1?
// //Shift out RDSR Command First 0x05
// CheetahApi.ch_spi_queue_ss(handle, 0x1);
// CheetahApi.ch_spi_queue_byte(handle, 1, 0x05);
// CheetahApi.ch_spi_queue_ss(handle, 0);
// CheetahApi.ch_spi_batch_shift(handle, 0,noresult);
// CheetahApi.ch_spi_queue_clear(handle);
// //Read One Byte Data Back
// CheetahApi.ch_spi_queue_ss(handle, 0x1);
// CheetahApi.ch_spi_queue_byte(handle, 1, 0x00);
// CheetahApi.ch_spi_queue_ss(handle, 0);
// CheetahApi.ch_spi_batch_shift(handle,1, data_back);
// CheetahApi.ch_spi_queue_clear(handle);
//}
//if (retry >= 100)
//{
// Console.Write("Write Enable Failed.\n");
// Console.Out.Flush();
// return 1;
//}
// Queue the write instruction for the flash.
// Page write command 0x02 + ADDR[3] + BYTE[256]
CheetahApi.ch_spi_queue_ss(handle, 0x1);
data_page[0] = 0x02;
data_page[1] = (byte)((addr >> 16) & 0xff);
data_page[2] = (byte)((addr >> 8) & 0xff);
data_page[3] = (byte)((addr >> 0) & 0xff);
Console.Write("addr = 0x{0:x6}; num bytes = {1:d}\n",
addr, PAGE_SIZE);
Console.Out.Flush();
// Set the data to be written to the flash to incrementing
// 32-bit values starting from 0.
int j = 0;
while (j < PAGE_SIZE)
{
data_page[4 + j] = data[j + pages * 256];
j += 1;
}
CheetahApi.ch_spi_queue_array(handle, 4 + PAGE_SIZE, data_page);
CheetahApi.ch_spi_queue_ss(handle, 0);
// Give the flash time to commit the written values.
// Using ch_spi_queue_delay_ns is much more accurate than
// using ch_sleep_ms.
CheetahApi.ch_spi_queue_delay_ns(handle,
PAGE_PROGRAM_CYCLE_TIME_NS);
addr += PAGE_SIZE;
data_length -= PAGE_SIZE;
pages += 1;
}
// Shift out the write command. (Don't need the data back.)
Console.Write("Shifting data\n");
Console.Out.Flush();
int batch = CheetahApi.ch_spi_batch_length(handle);
int count = CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
if (count != batch)
{
Console.Write("Expected {0:d} bytes but only received " +
"{1:d} bytes\n", batch, count);
return(1);
}
////Wait Programming Page Finished. Check WIP = 0?
//retry = 0;
//data_back[0] = (byte)(0xff);
//while (((data_back[0] & 0x01) != 0) && (retry++ < 100))
//{
// CheetahApi.ch_spi_queue_clear(handle);
// //Send RDSR Command check WIP bit = 0?
// //Shift out RDSR Command First 0x05
// CheetahApi.ch_spi_queue_ss(handle, 0x1);
// CheetahApi.ch_spi_queue_byte(handle, 1, 0x05);
// CheetahApi.ch_spi_queue_ss(handle, 0);
// CheetahApi.ch_spi_batch_length(handle);
// CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
// CheetahApi.ch_spi_queue_clear(handle);
// //Read One Byte Data Back
// CheetahApi.ch_spi_queue_ss(handle, 0x1);
// CheetahApi.ch_spi_queue_byte(handle, 1, 0x00);
// CheetahApi.ch_spi_queue_ss(handle, 0);
// CheetahApi.ch_spi_batch_shift(handle, 1, data_back);
// CheetahApi.ch_spi_queue_clear(handle);
//}
//if (retry >= 100)
//{
// Console.Write("Write Enable Failed.\n");
// Console.Out.Flush();
// return 1;
//}
Console.Write("Shift complete\n");
Console.Out.Flush();
// //Check Programming Result
// //Send RDSCUR Command 2B
// //Read Security Register bit 5
// CheetahApi.ch_spi_queue_ss(handle, 0x1);
// CheetahApi.ch_spi_queue_byte(handle, 1, 0x2b);
// CheetahApi.ch_spi_queue_ss(handle, 0);
// CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
// CheetahApi.ch_spi_queue_clear(handle);
// //Read One Byte Data Back
// data_back[0] = (byte)(0xff);
// CheetahApi.ch_spi_queue_ss(handle, 0x1);
// CheetahApi.ch_spi_queue_byte(handle, 1, 0x00);
// CheetahApi.ch_spi_queue_ss(handle, 0);
// CheetahApi.ch_spi_batch_shift(handle, 1, data_back);
// CheetahApi.ch_spi_queue_clear(handle);
// //Check P_FAIL bit = 0? 0-> PP pass ,1-> PP fail
// if ((data_back[0]>>5 & 0x01) != 0)
// {
// Console.Write("PP Failed...,PFAIL Flag == 1.\n");
// Console.Out.Flush();
// return 1;
// }
}
// Reset the state of the bus.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
ulong end = _timeMicroseconds();
Console.Write("Flashing take {0 :f3} seconds\n",
(double)(end - start) / 1000000);
Console.Out.Flush();
//verify the programming data is correct...
_read(handle, addr_back, data.Length / 1024, out data_in);
bool compare_result = false;
for (int k = 0; k < data.Length; k++)
{
if (data[k] != data_in[k])
{
compare_result = true;
break;
}
}
end = _timeMicroseconds();
Console.Write("Totally take {0 :f3} seconds\n", (double)(end - start) / 1000000);
if (!compare_result)
{
Console.Write("Flashing Successfull...\n");
Console.Out.Flush();
return(0);
}
else
{
Console.Write("Flashing Failed...\n");
Console.Out.Flush();
return(-1);
}
}
/*======================================================================
| FUNCTIONS
| =====================================================================*/
static void _blast_async(int handle, int txnlen, int iter)
{
double elapsed = 0;
byte[] noresult = new byte[1];
// Make a simple queue to just assert OE.
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, (byte)1);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
// Queue the batch which is a sequence of SPI packets
// (back-to-back) each of length 4.
CheetahApi.ch_spi_queue_clear(handle);
int i;
int count = 0;
byte[] data_out = new byte[4];
for (i = 0; i < txnlen; ++i)
{
CheetahApi.ch_spi_queue_ss(handle, 0x1);
data_out[0] = (byte)((count >> 24) & 0xff);
data_out[1] = (byte)((count >> 16) & 0xff);
data_out[2] = (byte)((count >> 8) & 0xff);
data_out[3] = (byte)((count >> 0) & 0xff);
++count;
CheetahApi.ch_spi_queue_array(handle, 4, data_out);
CheetahApi.ch_spi_queue_ss(handle, 0x0);
}
ulong start = _timeMillis();
// First, submit first batch
CheetahApi.ch_spi_async_submit(handle);
int n, ret;
for (n = 0; n < iter - 1; ++n)
{
// Submit another batch, while the previous one is in
// progress. The application may even clear the current
// batch queue and queue a different set of SPI
// transactions before submitting this batch
// asynchronously.
CheetahApi.ch_spi_async_submit(handle);
// The application can now perform some other functions
// while the Cheetah is both finishing the previous batch
// and shifting the current batch as well. In order to
// keep the Cheetah's pipe full, this entire loop must
// complete AND another batch must be submitted
// before the current batch completes.
CheetahApi.ch_sleep_ms(25);
// Collect the previous batch
ret = CheetahApi.ch_spi_async_collect(handle, 0, noresult);
elapsed = ((double)(_timeMillis() - start)) / 1000;
Console.Write("collected batch #{0:d3} in {1:f2} seconds\n",
n + 1, elapsed);
if (ret < 0)
{
Console.Write("status error: {0:s}\n",
CheetahApi.ch_status_string(ret));
}
Console.Out.Flush();
start = _timeMillis();
// The current batch is now shifting out on the SPI
// interface. The application can again do some more tasks
// here but this entire loop must finish so that a new
// batch is armed before the current batch completes.
CheetahApi.ch_sleep_ms(25);
}
// Collect batch the last batch
ret = CheetahApi.ch_spi_async_collect(handle, 0, noresult);
elapsed = ((double)(_timeMillis() - start)) / 1000;
Console.Write("collected batch #{0:d3} in {1:f2} seconds\n",
n + 1, elapsed);
if (ret < 0)
{
Console.Write("status error: {0:s}\n",
CheetahApi.ch_status_string(ret));
}
Console.Out.Flush();
}
/*=====================================================================
| FUNCTIONS
| ====================================================================*/
static void _writeMemory(int handle, ushort addr, ushort length, int zero)
{
short i, j, n;
int batch, count;
byte[] data_out = new byte[3 + PAGE_SIZE];
byte[] noresult = new byte[1];
// Write to the SPI EEPROM
//
// The AT25080A EEPROM has 32 byte pages. Data can be written
// in pages, to reduce the number of overall SPI transactions
// executed through the Cheetah adapter.
n = 0;
while (n < length)
{
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
// Send PAGE_WRITE_BATCH_SIZE number of pages to the Cheetah per
// batch shift
for (i = 0; i < PAGE_WRITE_BATCH_SIZE; i++)
{
if (n >= length)
{
break;
}
// Send write enable command
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0x06);
CheetahApi.ch_spi_queue_ss(handle, 0);
// Assemble the write command and address
Console.Write("addr = 0x{0:x4}; ", addr);
data_out[0] = (byte)0x02;
data_out[1] = (byte)((addr >> 8) & 0xff);
data_out[2] = (byte)((addr >> 0) & 0xff);
// Assemble the data
j = 3;
do
{
data_out[j++] = (zero != 0) ? (byte)0 : (byte)n;
++addr; ++n;
} while ((n < length) && ((addr & (PAGE_SIZE - 1)) != 0));
Console.Write("num bytes = {0:d}\n", j - 3);
Console.Out.Flush();
// Queue the write transaction
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_array(handle, j, data_out);
CheetahApi.ch_spi_queue_ss(handle, 0);
// Put in a wait for the write cycle time
CheetahApi.ch_spi_queue_delay_ns(handle, PAGE_WRITE_DELAY_NS);
}
// Shift the page writes
// Don't need the results back from the shift
Console.Write("Shifting data\n");
Console.Out.Flush();
batch = CheetahApi.ch_spi_batch_length(handle);
count = CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
if (count != batch)
{
Console.Write("Expected {0:d} bytes but only received " +
"{1:d} bytes\n", batch, count);
return;
}
Console.Write("Shift complete\n");
Console.Out.Flush();
}
}
/*=========================================================================
| MAIN PROGRAM
| ========================================================================*/
public static void Main(String[] args)
{
int handle = 0;
int port = 0; // open port 0 by default
int bitrate = 0;
int mode = 0;
ushort addr = 0;
ushort length = 0;
String command = "";
if (args.Length < 6)
{
print_usage();
Environment.Exit(1);
}
port = Convert.ToInt32(args[0]);
bitrate = Convert.ToInt32(args[1]);
mode = Convert.ToInt32(args[2]);
command = args[3];
addr = Convert.ToUInt16(args[4]);
length = Convert.ToUInt16(args[5]);
// Open the device
handle = CheetahApi.ch_open(port);
if (handle <= 0)
{
Console.Error.Write(
"Unable to open Cheetah device on port {0:d}\n", port);
Console.Error.Write("Error code = {0:d} ({1:s})\n", handle,
CheetahApi.ch_status_string(handle));
Environment.Exit(1);
}
Console.Write("Opened Cheetah device on port {0:d}\n", port);
Console.Write("Host interface is {0:s}\n",
((CheetahApi.ch_host_ifce_speed(handle)) != 0) ?
"high speed" : "full speed");
// Ensure that the SPI subsystem is configured
CheetahApi.ch_spi_configure(
handle,
(TotalPhase.CheetahSpiPolarity)(mode >> 1),
(TotalPhase.CheetahSpiPhase)(mode & 1),
CheetahSpiBitorder.CH_SPI_BITORDER_MSB, 0x0);
Console.Write("SPI configuration set to mode {0:d}, {1:s} shift, " +
"SS[2:0] active low\n", mode, "MSB");
Console.Out.Flush();
// Power the target using the Cheetah adapter's power supply
CheetahApi.ch_target_power(handle, CheetahApi.CH_TARGET_POWER_ON);
CheetahApi.ch_sleep_ms(100);
// Set the bitrate
bitrate = CheetahApi.ch_spi_bitrate(handle, bitrate);
Console.Write("Bitrate set to {0:d} kHz\n", bitrate);
Console.Out.Flush();
byte[] noresult = new byte[1];
// Shift a dummy byte to clear the EEPROM state
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_oe(handle, 1);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0x00);
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
// Perform the requested operation
if (command == "write")
{
_writeMemory(handle, addr, length, 0);
Console.Write("Wrote to EEPROM\n");
}
else if (command == "read")
{
_readMemory(handle, addr, length);
}
else if (command == "zero")
{
_writeMemory(handle, addr, length, 1);
Console.Write("Zeroed EEPROM\n");
}
else
{
Console.Write("unknown command: {0:s}\n", command);
}
// Close and exit
CheetahApi.ch_close(handle);
return;
}
/*=====================================================================
| FUNCTIONS
| ====================================================================*/
static void _timing(int handle)
{
int cycles;
int ns;
byte[] noresult = new byte[1];
// Test the SS timing
CheetahApi.ch_spi_queue_clear(handle);
Console.Write("Testing inter-SS delays...\n");
Console.Out.Flush();
CheetahApi.ch_spi_queue_oe(handle, 1);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
cycles = CheetahApi.ch_spi_queue_delay_cycles(handle, 51);
Console.Write(" Queued delay of {0:d} cycles within first SS " +
"assert/deassert.\n", cycles);
Console.Out.Flush();
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
ns = CheetahApi.ch_spi_queue_delay_ns(handle, 1500000);
Console.Write(" Queued delay of {0:d} ns within second SS " +
"assert/deassert.\n", ns);
Console.Out.Flush();
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 0, noresult);
// Test data timing in read mode
Console.Write("Testing inter-data (read) delays...\n");
Console.Out.Flush();
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0xca);
ns = CheetahApi.ch_spi_queue_delay_ns(handle, 250000);
Console.Write(" Queued delay of {0:d} ns after first byte " +
"(0xca).\n", ns);
Console.Out.Flush();
CheetahApi.ch_spi_queue_byte(handle, 2, 0xfe);
cycles = CheetahApi.ch_spi_queue_delay_cycles(handle, 995);
Console.Write(" Queued delay of {0:d} cycles after second byte " +
"(0xfe).\n", cycles);
Console.Out.Flush();
CheetahApi.ch_spi_queue_byte(handle, 3, 0x00);
cycles = CheetahApi.ch_spi_queue_delay_cycles(handle, 20);
Console.Write(" Queued delay of {0:d} cycles after last byte " +
"(0x00).\n", cycles);
Console.Out.Flush();
CheetahApi.ch_spi_queue_ss(handle, 0);
byte[] data_in = new byte[6];
CheetahApi.ch_spi_batch_shift(handle, 6, data_in);
// Test data timing with write mode
Console.Write("Testing inter-data (write) delays...\n");
Console.Out.Flush();
CheetahApi.ch_spi_queue_clear(handle);
CheetahApi.ch_spi_queue_ss(handle, 0x1);
CheetahApi.ch_spi_queue_byte(handle, 1, 0xba);
ns = CheetahApi.ch_spi_queue_delay_ns(handle, 80000);
Console.Write(" Queued delay of {0:d} ns after first byte " +
"(0xba).\n", ns);
Console.Out.Flush();
CheetahApi.ch_spi_queue_byte(handle, 2, 0xbe);
cycles = CheetahApi.ch_spi_queue_delay_cycles(handle, 995);
Console.Write(" Queued delay of {0:d} cycles after second byte " +
"(0xbe).\n", cycles);
Console.Out.Flush();
CheetahApi.ch_spi_queue_byte(handle, 3, 0x00);
cycles = CheetahApi.ch_spi_queue_delay_cycles(handle, 20);
Console.Write(" Queued delay of {0:d} cycles after last byte " +
"(0x00).\n", cycles);
Console.Out.Flush();
CheetahApi.ch_spi_queue_ss(handle, 0);
CheetahApi.ch_spi_queue_oe(handle, 0);
CheetahApi.ch_spi_batch_shift(handle, 1, data_in);
}