CI230X RF Test Instructions and Methods¶
Test environment construction¶
◆ The DUT to be tested is a module or development board based on CI230X chip.
◆ During the test, the PC sends the corresponding ATE test command, and the PC interacts with the DUT through UART to configure various test modes.
◆ The test instrument is IQ/Test Convergence Meter/CMW Comprehensive Tester/Spectrum Analyzer and other instruments that can test RF performance indicators
Test preparation¶
Before conducting this test, please first check ☞CI-E05GT02S_MB Development Board Kit Description. All our RF tests are based on CI-E05GT02S_ MB development board suite.
Hardware test preparation¶
◆ CI-E05GT02S_ MB development board kit 1 PCS
◆ CI-E0XGT02S module 1 PCS
◆ One USB Type-C data cable
◆ USB to serial port tool
◆ Several DuPont lines
Software test preparation¶
◆ Burning test firmware: basic RF test burning 《CI230X Fixed Frequency Test Firmware》.
◆ Installation of USB to serial tool drive: ensure that the serial port drive has been correctly followed. If the serial port cannot be identified, it is recommended to install the USB to serial tool chip by yourself
Description of conduction test hardware¶
◆ Cut the wire to disconnect the antenna from the matching circuit. After connecting the cable to the matching circuit, ensure that the cable is well grounded.
◆ If based on CI-E05GT02S_ The MB development board kit conducts the conduction test. The USB to serial port circuit has been loaded on the board. Just short circuit the jumper caps at PE2 and PE3, switch the serial port selection switch to “Wi Fi”, and connect the development board to the computer through the USB Type-C data cable.
◆ If conducting test is conducted separately based on CI-E0XGT02S module, connect USB serial port tool to PE2 and PE3 pins of the module, and connect 3.3V power supply and GND to the module.
◆ Open the serial port tool. It is recommended to use SSCOM or other serial port tools. Set the baud rate to 115200, select the corresponding COM port, and then configure the test command according to the subsequent commands in this article to test each mode.
CI230X AT production test command description¶
Command format¶
Commands and parameters are separated by spaces or”,”. Each command ends with \r n.
Mandatory parameters are identified with<>, and optional parameters are identified with [], such as:
Command A
Example：
AT+PVTCMD=EVM,TX,N,7,1,1000\r\n
or
AT+PVTCMD=EVM TX N 7 1 1000\r\n
Wi-Fi RF TX/RX control command¶
Command function¶
By sending such commands, RF transmission and reception control are carried out.
Change the channel command¶
Command：AT+PVTCMD=set_rf_channel <Chan>\r\n
note：
Chan is a required parameter. The value range is1~14 .
Return success：+set_rf_channel OK ch:6
Return failure：+set_rf_channel FAIL
Set TX related parameters¶
Command：AT+PVTCMD=EVM,TX,Mode,Rate,Channel,PackageLength\r\n
◆ Mode: BL/BS/G/N
◆ Rate：
11B 1,2,5.5,11
11G 6,9,12,18,24,36,48,54
11N 0,1,2,3,4,5,6,7
◆ Channel:1~14
◆ PackageLength:1000,1024
Return success：+evm OK
Return failure：+evm FAIL
Example：
11B 1M CH1: AT+PVTCMD=EVM,TX,B,1,1,1000\r\n
Set RX (continuous mode) related parameters¶
Command：AT+PVTCMD=EVM,RX,Channel\r\n
Return success：+evm OK
Return failure：+evm FAIL
Single RX test¶
◆ Step1：start-up RX test
Command：AT+PVTCMD=EVM,RXS,1,CH\r\n
Return success：+evm OK
Return failure：+evm FAIL
◆ Step2: Stop test
Command：AT+PVTCMD=EVM,RXS,0,CH\r\n
Return success：+evm OK
Return failure：+evm FAIL
◆ Step3：Read data
Command：AT+PVTCMD=EVM,RXS,INFO\r\n
Return success：+evm OK and display the number of packages received and PER
Return failure：+evm FAIL
Set evm tx transmission interval¶
Command：AT+PVTCMD=evm_tx_interval <interval>\r\n
Parameter: interval value of 100 is used for evm tx test when the duty cycle is close to full packet (>% 95) to analyze the emission current; The interval value of 10000 (program default) is the normal EVM index test.
Note: Restore the default value of 10,000 after each startup.
AT+PVTCMD=evm must be used first_ tx_ Interval
Bluetooth RF TX/RX control command¶
Receive test instructions¶
–CMD(H_CMD_LE_RX_TEST),The last byte of the instruction represents Rx Frequency = 0x00 ,Examples are as follows
<UART>TX:[01 1D 20 01 00]
Note: The first four bytes are fixed, and the last byte represents the test frequency point（0x00~0x27）.
The corresponding relationship is as follows:
0x00=ch37, 0x01=ch0, 0x02=ch1.....
Receive the response of the test command. Note: pay attention to the last byte of the response, and the correct return must be 0.
<UART>RX:[04:0E:04:05:1D:20:00]
Parameter interpretation:
CMD_COMPLETE_EVT(H_CMD_LE_RX_TEST) :
Length = 0x04
Nb Hci Command Packets = 0x05
Command Opcode = 0x201D (cmd_le_rx_test)
Status = 0x00 (success)
Send test instructions¶
–CMD(H_CMD_LE_TX_TEST)：It includes the following three parameters
Tx Frequency = 0x00 （0x00~0x27）（Here, the channel needs to be converted to hexadecimal, that is, 00 corresponds to CH0, 13 corresponds to CH19, and 27 corresponds to CH39）
Data Length = 0x25
Packet Payload = 0x00 (0:PRBS9)(0x01:11110000 Packet )(0x02:10101010 Packet Payload)
Examples are as follows
<UART>TX:[01 1E 20 03 00 25 00]
Note: The first four bytes are fixed, and the last three bytes represent the test frequency, packet length, and packet content
Send the response to the test command. Note: Pay attention to the last byte of the response, and the correct return must be 0.
<UART>RX:[04:0E:04:05:1E:20:00]
CMD_COMPLETE_EVT(H_CMD_LE_TX_TEST)：
Parameter explanation:
Length = 0x04
Nb Hci Command Packets = 0x05
Command Opcode = 0x201E (cmd_le_tx_test)
Status = 0x00 (success)
Test end instruction¶
–CMD(H_CMD_LE_TEST_END) Note: Fixed command, no parameter
<UART>TX:[01 1F 20 00]
Response to test end command
<UART>RX:[04:0E:06:05:1F:20:00:00:00]
Parameter explanation:
CMD_COMPLETE_EVT(H_CMD_LE_TEST_END)
Length = 0x06
Nb Hci Command Packets = 0x05
Command Opcode = 0x201F (cmd_le_test_end)
Status = 0x00 (success)
Nb Packets = 0x0000 (d0)
Note: If TX was previously sent_ TEST_ CMD, the last two bytes of the response content are all 0; If RX was previously sent_ TEST_ CMD, the last two bytes of the response content represent the number of packets actually received.
Enhanced receive test instruction¶
–CMD(H_CMD_LE_ENH_RX_TEST) ：includes the following three parameters
Rx Channel = 0x00 （0x00~0x27）
Phy = 0x01 (0x01：1 Mbps PHY)【0x02：2M、0x03：coded】
Modulation mode Modulation Index = 0x00 (0：Standard Modulation, 1：Stable Modulation)
Examples are as follows:
<UART>TX:[01 33 20 03 00 01 00]
Enhanced response to receive test instructions
<UART>RX:[04:0E:04:05:33:20:00]
CMD_COMPLETE_EVT(H_CMD_LE_ENH_RX_TEST) :
Length = 0x04
Nb Hci Command Packets = 0x05
Command Opcode = 0x2033 (cmd_le_enh_rx_test)
Status = 0x00 (success)
Enhanced send test instruction¶
–CMD(H_CMD_LE_ENH_TX_TEST) ：include the following 4 parameters
Tx Channel = 0x00
Length = 0xFB
Payload = 0x00 (0x00:PRBS9)(0x01:11110000 Packet )(0x02:10101010 Packet Payload)
Phy = 0x01 (0x01:1Mbps PHY)【0x02：2M、0x03：coded】
Examples are as follows:
<UART>TX:[01 34 20 04 00 FB 00 01]
Enhanced test command sending response
<UART>RX:[04:0E:04:05:34:20:00]
CMD_COMPLETE_EVT(H_CMD_LE_ENH_TX_TEST)：
Length = 0x04
Nb Hci Command Packets = 0x05
Command Opcode = 0x2034 (cmd_le_enh_tx_test)
Status = 0x00 (success)
Reset command¶
<UART>TX:[01 03 0C 00]
Command sending process¶
First send the reset command, then send the test command
When the sending/receiving test ends, you need to send the test end command
Namely:
Reset command -> Send/receive test commands -> Test end command
Common Commands¶
| Command | Effect |
|---|---|
| BLE_Receive | 01 1D 20 01 00 |
| BLE_Send | 01 1E 20 03 00 25 00 |
| BLE_End test | 01 1F 20 00 |
| BLE_Prepare to enter the sideband test | 01 1E 20 03 40 00 00 |
| BLE_Exit sideband test | 01 1E 20 03 50 00 00 |
Crystal compensation capacitor¶
Command function¶
Offset value setting of crystal compensation capacitance of module production line, including positive and negative values. The boundary of offset value range is to be determined.
After the command parameters are set, the module frequency offset compensation will take effect immediately, but will not be saved to flash. The frequency offset change can be observed on the test instrument.
Command demonstration¶
AT+PVTCMD=XTAL_CAP,3\r\n
AT+PVTCMD=XTAL_CAP,-5\r\n
Return success：+xtal_cap OK offset:3
Return failure：+xtal_cap FAIL
note：+1 = -1ppm
The setting here is crystal offset, not difference
Wi-Fi transmit power compensation¶
Command function¶
The module production line RF transmission power fine-tuning offset value setting has positive and negative values. The boundary of the offset value range is to be determined.
After the command parameters are set, the TX power compensation of the module takes effect immediately, but is not saved to flash. The power change can be observed on the test instrument.
Command demonstration¶
AT+PVTCMD=TX_POWER,7\r\n
AT+PVTCMD=TX_POWER,-4\r\n
Return success：+tx_power OK offset:7
Return failure：+tx_power FAIL
note：+4=0.5db
The setting here is crystal offset, not difference
Wi-Fi production line test results¶
Command function¶
After the module production line test is completed, write the test results to the module, 1=success, 0=failure. The module calls relevant interfaces to write the test results (all test success/failure, crystal compensation, transmission power) to flash
Note: This command is the last command of the production line test. The return of the command “OK r n” indicates that the results have been written to flash. After receiving this command, the instrument should power down the module to enter the next station to ensure successful flash writing
Command demonstration¶
AT+ATE_OK=1\r\n
AT+ATE_OK=0\r\n
Return success：OK\r\n