SPRADG4A January 2024 – April 2024
The software in Build 1 is configured so that the user can quickly evaluate the DAC driver module by viewing various waveforms on an oscilloscope and observe the effect of change in the phase shift value reference command on the output voltage by interactively adjusting this command from CCS. Additionally, the user can evaluate the ADC driver module by viewing the ADC sampled data in the watch view. The ePWM4 module acts as the master time-base for the system. It operates in up-down count mode. ePWM4A and ePWM4B drive Q1 and Q4 full-bridge switches, while ePWM3A and ePWM3B drive Q2 and Q3 full-bridge switches. Whenever the phase shift value changes, the time base phase shift register of the ePWM3 module gets updated accordingly and the outputs (both ePWM3A and ePWM3B) start generating pulses with the same amount of phase delay with respect to the ePWM4 module.