Traveo II

Hello,

I would like to generate fast sine using PWM and DMA (128kHz sine). This signal would source inverter, it would be needed complementary PWM signal, but only one of PWM out can be active during one half of sine, the second out has to be fixed low during this time (like on the below picture).

I used PWM dedicated for Motor Control, because it has got a feature to force states on the PWM output (line selection). I prepared 3 lookup tables with Period, Duty cycle and Line selection.

uint32_t period[SINE_SIZE];
uint32_t duty[SINE_SIZE];
uint32_t lineSel[SINE_SIZE];

PWM is running in Up mode, at the beggining of PWM cycle there are sent new values from lookup tables to TCPWM registers (sending is done using DMA).

period[i]  -> TCPWM0_GRPx_CNTy_PERIOD_BUFF
duty[i]      -> TCPWM0_GRPx_CNTy_CC0_BUFF
lineSel[i] -> TCPWM0_GRPx_CNTy_LINE_SEL_BUFF

I set up a following configuration:

An result of such configuration:

Unfortunately chops are not in accordance with defined values in lookup tables. My suspicion is that DMA transfer tooks to much time. Transfer is triggered on CC1 event, unCC1 is set to 1u.

My questions:
1. What can be a latency of DMA?
2. Is it possible to set up Trigger Multiplexer that one Trig out (TCPWM) is shared between three Trig ins of DMA (ch 8, 1 and 0)?
3. Any additional hints how to configure peripherials to achive mentioned signal?

Hello,

I can find some documents related to CYT2B7 (like data sheet and User manual), but there is no definition of the registers (address, content...)

I have found this:

https://www.cypress.com/documentation/technical-reference-manuals/traveo-ii-automotive-body-controller-entry-registers-trm

but this is empty and just say that we need to downlaod html files. But I cannot find the file in question.

Could you please tell me how to have access to this TVII_B_E_1M_Registers_TRM.html and others..

Thanks for your help.

BR

Damien

Hello,

I am using CYT2B9 controller in my new project. I couldn't find the user manual for the controller anywhere. Can anybody please guide me to find this document?

Kind Regards

Varun R