ESP8266 Community Forum

- Sun Aug 23, 2015 11:51 am #26891 Yes... but that shouldn't be a problem when only trying with 1 PWM channel no?

Code: Select alluint32 pwm_duty_init[PWM_CHANNEL] = {0,0,0};

for 3 channels didn't help.

- Sun Aug 23, 2015 11:52 am #26892

Also you might want to try this:

Code: Select alluint32 io_info[][3] = {{PWM_0_OUT_IO_MUX,PWM_0_OUT_IO_FUNC,PWM_0_OUT_IO_NUM},{PWM_1_OUT_IO_MUX,PWM_1_OUT_IO_FUNC,PWM_1_OUT_IO_NUM},{PWM_2_OUT_IO_MUX,PWM_2_OUT_IO_FUNC,PWM_2_OUT_IO_NUM}};

change to this:

Code: Select alluint32 io_info[PWM_CHANNEL][3] = {{PWM_0_OUT_IO_MUX,PWM_0_OUT_IO_FUNC,PWM_0_OUT_IO_NUM},{PWM_1_OUT_IO_MUX,PWM_1_OUT_IO_FUNC,PWM_1_OUT_IO_NUM},{PWM_2_OUT_IO_MUX,PWM_2_OUT_IO_FUNC,PWM_2_OUT_IO_NUM}};


So you're sure that the io_info array is exactly as large as the pwm_init function expects. This is just like #define usage, help the compiler help you by not trusting on "easy" default behaviour.

thanks for the tip! that didn't help.

- Mon Aug 24, 2015 11:05 am #26955

Anyway, I already tried with 1 and 2 pwm channels... no success.

Did you solve your problem?

My PWM-test with GPIO13 (1 channel) works with sdk1.3.0:

Code: Select allLOCAL uint32 duty = 500;
LOCAL uint32 io_info[][3] = {{PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13, 13}};
LOCAL void ICACHE_FLASH_ATTR config_PWM(void) {
   pwm_init(1000, &duty, 1, io_info);
   pwm_start();
}

Have fun!

- Mon Aug 24, 2015 11:11 am #26956

Anyway, I already tried with 1 and 2 pwm channels... no success.

Did you solve your problem?

My PWM-test with GPIO13 (1 channel) works with sdk1.3.0:

Code: Select allLOCAL uint32 duty = 500;
LOCAL uint32 io_info[][3] = {{PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13, 13}};
LOCAL void ICACHE_FLASH_ATTR config_PWM(void) {
   pwm_init(1000, &duty, 1, io_info);
   pwm_start();
}

Unfortunately your code doesn't work on my project... I'm wondering if this is makefile related...