I try to configure pin gpmc_ad8 and gpmc_ad9 of BeagleBone Black(BBB) operating as an eHRPWM (PWMSS2) in QNX RTOS as these lines of code below:
#define conf_gpmc_ad8 (0x44E10000+0x0820)
#define conf_gpmc_ad9 (0x44E10000+0x0824)
#define CONTROL_CONF_MUXMODE(n) (n)
uintptr_t GPMC_AD8_REG = mmap_device_io(4, conf_gpmc_ad8);
if(GPMC_AD8_REG == MAP_DEVICE_FAILED)
{
perror("Can't map GPMC_AD8_REG");
return 0;
}
reg_val = CONTROL_CONF_MUXMODE(4);
out32 (GPMC_AD8_REG, reg_val);
usleep(10000);
stt_done = in32(GPMC_AD8_REG);
printf("CONTROL_CONF_GPMC_AD8 = %x (#4)\n", stt_done);
uintptr_t GPMC_AD9_REG = mmap_device_io(4, conf_gpmc_ad9);
if(GPMC_AD9_REG == MAP_DEVICE_FAILED)
{
perror("Can't map GPMC_AD9_REG");
return 0;
}
reg_val = CONTROL_CONF_MUXMODE(3);
out32 (GPMC_AD9_REG, reg_val);
usleep(10000);
stt_done = in32(GPMC_AD9_REG);
printf("CONTROL_CONF_GPMC_AD9 = %x (#4)\n", stt_done);
But I can not change mode of pin AD8 and AD9 to EHRPWM2A and EHRPWM2B. Value of 2 registers are always equal 0x27 (maybe this is an default value). Anyone who has experiment with QNX can help me pls. Thanks so much.
