Hi:
器件信息：
CC2541, BLE Stack v1.3.2, android app(based on sensortag source code),
connect interval: 50ms
我们遇到的问题
我们的使用OAD升级CC2541 的固件时，andorid app 会报错: GATT write timeout
问题描述：
我们每隔50ms写一次数据.
当我们一次写1块数据（16字节）时，OAD正常。
但是当我们一次写4块数据时， OAD 报错: GATT write timeout
我们的问题:
1： 据我所知：BLE GATT 每CONNECT event可以发送4个包（每个包数据长度不超过20个字节), 应此
应该能及时发送出去。
2： 数据写选择的是 WRITE_TYPE_NO_RESPONSE， 应该写入即可，即无需等待server返回，
andorid app 如何会超时呢？？
mCharBlock.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE);
代码片段：
while (mProgramming) {
try {
Thread.sleep(SEND_INTERVAL);
} catch (InterruptedException e) {
e.printStackTrace();
}
for (int i = 0; i < BLOCKS_PER_CONNECTION & mProgramming; i++) {
programBlock();
}
if ((mProgInfo.iBlocks % 100) == 0) {
// Display statistics each 100th block
FwUpdateActivity.this.runOnUiThread(new Runnable() {
public void run() {
displayStats();
}
});
}
} private void programBlock() {
if (!mProgramming)
return;
if (mProgInfo.iBlocks < mProgInfo.nBlocks) {
......
// Send block
mCharBlock.setValue(mOadBuffer);
boolean success = mLeService.writeCharacteristic(mCharBlock);
if (success) {
// Update stats
mProgInfo.iBlocks++;
mProgInfo.iBytes += OAD_BLOCK_SIZE;
mProgressBar.setProgress((mProgInfo.iBlocks * 100) / mProgInfo.nBlocks);
// if (mProgInfo.iBlocks > 362) {
if (!mLeService.waitIdle(GATT_WRITE_TIMEOUT)) {
//mProgramming = false;
//success = false;
mLeService.mBusy=false;
msg = "GATT write timeout :"+mProgInfo.iBlocks+"\n";
FwUpdateActivity.this.runOnUiThread(new Runnable() {
public void run() {
mLog.append(msg);
}
});
}
} else {
mProgramming = false;
msg = "GATT writeCharacteristic failed\n";
}
......
} else {
mProgramming = false;
}
.........
}
感谢各位的回复与解答！！！！！
