When running the program I created, for some reaso

When running the program I created, for some reason, after branching at $$brk_reset,$$error in the startup file (*.ASM), it enters a WDT interrupt and eventually reset. Why does it behave this way?
创建于2024-07-01

代理服务

技术支持

采购服务

写回答

1个回答

用户_5489 (0)

transition to $$brk_reset,$$error in the startup file (*.ASM) occurs when the BRK instruction (0xFFFF) is executed.
Addresses to which no instruction is assigned are filled with 0xFFFF, so it seems that for some reason this address was executed and transitioned to $$brk_reset, $$error.
As a possible cause,
・Interrupt Vector is not defined
・A branch destination (function) such as an indirect call is not defined
・Interrupts are enabled within interrupt functions that disable MULTIple interrupts
・stack overflow occurs
And so on.
Please check if any of the above apply.
Transitions can be easily checked using the branch trace function of the on-chip emulator.

创建于2024-07-01

发送到邮箱 |
+1 赞 0
收藏
| 转发至：

平台合作

展开

When running my FT4222H application program, I see the error “LibFT4222.dll is missing from your computer”. How can this be resolved?

This can happen if the LibFT4222.dll is not found by the program.Simply copy the LibFT4222.dll into the same directory as the .exe, or copy the LibFT4222.dll into the C:\Windows\System32 directory.Now it should run.You can modify the projects or create your own project. These are only examples which we provide.Note: This also applies to other projects that use a DLL, not just LibFT4222.dll.

2024-06-28 - 技术问答代理服务技术支持采购服务

What should I do when I cannot program EEPROM using the FT_Prog utility?

Please ensure that our SPI EEPROM chip is 93C46B/56B/66B, and that the EEPROM is configured in 16-bit data mode. Pull the ORG pin to VCC to put the EEPROM into 16-bit data mode. Please not however that 94C46 is not supported. This applies to FT232H, FT2232H, FT4232H and FT23xHP, FT223xHP, FT423xHP which all use an external EEPROM for configuration.

2024-06-28 - 技术问答代理服务技术支持采购服务

How can I check the ROM/RAM size used by an entire program?

It can be calculated from the content of the MAP file (.map) created at the time of build with IDEU8. The ROM size used by an entire program can be calculated by the following formula: Total size (CODE) + Total size (Table) - ROM reference area. Total size (CODE) indicates the total size of a program. Total size (Table) indicates the sum of constant data size and ROM reference area data size. ROM reference area data size corresponds to the values in the size column of those having “S TABLE” in the Type column and “(absolute)” in the Name column in the table in the MAP file. The RAM size used by an entire program is Total size (DATA). This indicates the sum of variables and stacks used by a program. For details, see also “3.3. ROM Size Calculation Method” and “3.4. RAM Size Calculation Method” in “CCU8 Programming Guide”. Related Products: ML610(Q)40x, ML610(Q)42x, ML610(Q)47x, ML610(Q)48x, ML610Q10x, ML610Q11x, ML610Q17x, ML610Q30x, ML610Q35x, ML610Q36x, ML610Q38x, ML610Q41x, ML610Q43x, ML610Q46x, ML620Q13x, ML620Q15x, ML620Q416/ML620Q418, ML620Q503H/ML620Q504H/ML620Q506H, ML62Q12xx, ML62Q13xx, ML62Q14xx, ML62Q15xx/ML62Q18xx, ML62Q16xx, ML62Q17xx

2024-08-30 - 技术问答代理服务技术支持采购服务

Are there any cautions/notes when program development is done with the assembler?

When a program is developed with assembly language, and not combining the startup file (s610xxxxx.asm), the RAM area is not initialized; therefore, make sure to initialize with the program. When combining with a program written in C language, refer to "1.6 Combining with Assembly Language" in "CCU8 Programming Guide", and write your code accordingly. Related Products: ML610(Q)40x, ML610(Q)42x, ML610(Q)47x, ML610(Q)48x, ML610Q10x, ML610Q11x, ML610Q17x, ML610Q30x, ML610Q35x, ML610Q36x, ML610Q38x, ML610Q41x, ML610Q43x, ML610Q46x, ML620Q13x, ML620Q15x, ML620Q416/ML620Q418, ML620Q503H/ML620Q504H/ML620Q506H, ML62Q12xx, ML62Q13xx, ML62Q14xx, ML62Q15xx/ML62Q18xx, ML62Q16xx, ML62Q17xx

2024-08-30 - 技术问答代理服务技术支持采购服务

Can I use the Thermal Wizard Selection Tool without knowing my cooling requirements?

Yes. The Thermal Wizard provides four calculators for Device Cooling, Enclosure Cooling, Air Cooling and Liquid Cooling with preprogrammed examples. Each calculator has several examples to help you get started. Once you have determined the Qc value, you are able to specify the appropriate thermoelectric products.

2024-10-30 - 技术问答代理服务技术支持采购服务

Is the RF SAW filter needed?

Although it is not needed for meeting the standard, we recommend to insert the RF SAW filter because interfering sources may exist near any actual operation band. Related Products: ML7344/ML7406 family, ML7345 family, ML7396 family, ML7404, ML7414

2024-08-30 - 技术问答代理服务技术支持采购服务

What is the size of sample program code?

Sample code size for ML5236 is 23KB, ML5238 is 26KB. For ML5236, data ROM of 2.3KB is used for parameter and log storage.

2024-08-30 - 技术问答代理服务技术支持采购服务

How can I call a C function from the startup routine?

Use BL instruction to call a C function from the startup routine. Put an underscore (_) at the beginning of a C function name to call. The following shows an example. Example: BL _sub

2024-08-30 - 技术问答代理服务技术支持采购服务

Is it possible to use I2S output (master) on the ML22Q53X?

Since the SAI interface (I2S) of the ML22Q53X is a slave, I2S output (master) is not possible. Related Products: ML22530/Q53x, ML22660/Q66x

2024-08-30 - 技术问答代理服务技术支持采购服务

Are there any problems if program codes are located in the software interrupt vector areas?

The software interrupt vector areas (0080H to 00FFH) can be used as normal program areas if the SWI instruction is not used. Related Products: ML610(Q)40x, ML610(Q)42x, ML610(Q)47x, ML610(Q)48x, ML610Q10x, ML610Q11x, ML610Q17x, ML610Q30x, ML610Q35x, ML610Q36x, ML610Q38x, ML610Q41x, ML610Q43x, ML610Q46x, ML620Q13x, ML620Q15x, ML620Q416/ML620Q418, ML620Q503H/ML620Q504H/ML620Q506H, ML62Q12xx, ML62Q13xx, ML62Q14xx, ML62Q15xx/ML62Q18xx, ML62Q16xx, ML62Q17xx

2024-08-30 - 技术问答代理服务技术支持采购服务

For BD3490FV,BD3491FS, Is the sound quality of Bass Gain and Treble Gain different when Cut 0dB and Boost 0dB?

It is the same.

2024-08-30 - 技术问答代理服务技术支持采购服务

What happens if there are less through holes on GND for the back side GND pad of the chip?

GND may be shaken and various RF characteristics would be worse. Even if 12 through holes are used, the same situation would happen unless connected GND plane is strengthed. Related Products: ML7344/ML7406 family, ML7345 family, ML7396 family, ML7404, ML7414

2024-08-30 - 技术问答代理服务技术支持采购服务