Hi,
I have a problem with Write Single Block (both sending and not sending UID)
The command works fine and I am able to write a block but I do not receive expected IRQ so I am not able to understand if the write is correct.
I am using Plus tags of any sizes
This is the sequence:
- Send command (option flag active)
- 0xA0 irq received (do nothing and wait next irq)
- 0x80 irq received. Wait 70ms and "TransmitNextSlot" (waiting less than 70ms results in a collision). I get the same result if I do not "TransmitNextSlot"
- No other irq are received (I expect a 0x40 irq)... .but data is written correctly.
The code to send the command is:
uint8_t buffer[12+UID_LEN];
uint16_t data_size = 7;
uint8_t flags = TRF_FLAG_OPTION;
if (uid)
{
data_size += UID_LEN;
flags |= TRF_FLAG_ADDRESS;
}
buffer[i++] = 0x8f; // Reset FIFO
buffer[i++] = 0x91; // Send with CRC
buffer[i++] = 0x3d; // Continuous write starting from 1D (transmission length)
buffer[i++] = (uint8_t)(data_size >> 8); // Data size (high byte)
buffer[i++] = (uint8_t)(data_size << 4); // Data size (low byte)
buffer[i++] = flags; // Flags
buffer[i++] = command; // Command
if (uid)
{
for (uint8_t j=0; j<UID_LEN; j++) // Copy UID (inverted)
{
buffer[i++] = uid[UID_LEN-1-j];
}
}
buffer[i++] = block_address; // Address
buffer[i++] = command_buffer[dataIndex+0]; // Data
buffer[i++] = command_buffer[dataIndex+1];
buffer[i++] = command_buffer[dataIndex+2];
buffer[i++] = command_buffer[dataIndex+3];
SPI_WriteBuffer(buffer, 0, i);
Any ideas? Thank you.
Best Regards
Alessandro
