ADC continuous mode and start-stop mode
Altair EmployeeHello,
I implemented motor control system using F28335 DSP. I'm having issues with the sampling rate of the ADC output.
In order to test the ADC, I created a simple model (ADC_test.psimsch). PWM switching frequency is 10k. It works fine when ADC mode is continuous. But when I set it to start-stop(8 channel) the sampling rate of the ADC out put is 4 times slow. When start-stop(16 channel) mode is selected, the sampling rate is 8 times slow. Can you please help me to solve this issue. I need to use start-stop(16 channel) for my drive.
Thank you.
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Altair EmployeePlease post your simulation for review.
Altair EmployeeHad you got any solution for this problem, actually i am also getting the same problem.
Altair Employee@narmada I am facing the same problem have got any solution for it please share,thanks in advance.
Altair Employee@sssatish
In the generated project, there is an inline function named PS_ExitAdcIntr at about line 590 in file PSbios.h, the function should be changed as follows:
inline void PS_ExitAdcIntr(int intrNo, int intrLevel) {
ADC_TRL2 |= 1 << ((2 - intrNo) * 8 + 6); // Set RST_SEQ1 / RST_SEQ2
ADC_ST |= 1 << (intrNo + 3); // Set INT_SEQ1_CLR / INT_SEQ2_CLR
CPU_PIEACK = intrLevel;
}
This will solve the issue.
When I simulate the system, there are no issues. The problem arises only when I test it practically.