Linux/AM5728: AM57xx-EVM PWM dead-band feature

Hello Akash,

Technically this is a non-supported feature in TI Linux. Let me poke around to see if I can find anything that would be helpful.

Please post your version of software, and your code trying to generate dead-band. We don't support application development in the forums, so I might not be able to give feedback - but it might also help me in helping you.

Regards,

Nick

Hi Nick,
Am not asking about application support, am just want to know approach to use dead-band feature of PWM controller. I tried from driver side but not succeed, then i using user space by using mmap and right now am struggling with it.

Am using Code Composer Studio - Version: 8.2.0.00007
ti-processor-sdk-linux-am57xx-evm-05.01.00.11

Sample Code

void* DBCTL_addr = NULL;

int fd = open("/dev/mem", O_RDWR);
if( fd < 0 )
{
printf("Could not open memory\n");
return;
}

DBCTL_addr = mmap(NULL, 0x00000200, PROT_READ | PROT_WRITE, MAP_SHARED, fd,(baseAddr));

volatile unsigned* DBCTL_Ouput = (unsigned*)(DBCTL_addr + EHRPWM_DBCTL);
*DBCTL_Ouput = 0x0000221F;
/* (DBCTL_addr & (~EHRPWM_DBCTL_OUT_MODE)) | ((DBgenOpMode << EHRPWM_DBCTL_OUT_MODE_SHIFT) &
EHRPWM_DBCTL_OUT_MODE); */
close(fd);

Take help from below mention link used for am335x
android.googlesource.com/.../ehrpwm.c