Tmsvc5502 DSP development issues.

For: whzeng@126.com

1. Connect the host and board with the USB simulator of. After power-on, start ccs. The error 240 occurs and the CPU cannot be initialized?
Finally, it is clear that the version of CCS is too low. Previously, it was 2.2.18, and now it is 2.2.21.

2. It is normal to use F11 for single-step debugging, but cannot be executed if F11 is used or f5?
The clock is incorrect because the external crystal oscillator is not properly connected; the watchdog is started and reset continuously.

3. max6818 enables key switch control. ch triggers int1 interruption and service interruption.ProgramData can be output, and then the key is determined by reading pgpio. The problem is that the breakpoint is set in the interrupted service program. If the key is not released, the program runs normally; if no breakpoint is set, no response is executed (the response led is lit by pressing the next key )?

4. How can I configure McBSP to return to the loop mode and FSR and clkx are provided by the sampling law generator without generating correct waveforms?
In the digital loop mode, FSR can only be provided by FSX.

5. Do I have to set the CPU clock after initializing CSL?

No

6. Call irq_setfreq to set the position of the interrupt vector table. Is the input parameter a byte address?

Yes, it is not a word address.

7. Does the output clock of the I2C module always have waveforms after the I2C reset is canceled?

No. After resetting, the SCL is high.

8. Is the Bus Error interrupted after the DMA is started?

Frame indexes and element indexes must be strictly configured according to the manual. Otherwise, a bus error occurs.

9. The data received by McBSP is transferred to the memory through DMA. Why does the DMA function be disabled during DMA interruption, while the DMA function is started in the program?

After the DMA Operation is completed, it is automatically disabled. McBSP is still in rrdy = 1, so no DMA interruption will occur even if the DMA is restarted. solution: Disable the McBSP receiver before the DMA interrupt. The program starts the DMA first and then starts the McBSP receiver;