[Solved] Hardware timer crashes, nonos SDK 1.5.2

[Goldpin]

Hi,

I'm using hw_timer.c from nonos SDK 1.5.2 to set a hardware timer without autoload. The callback function fires with specified delays, but i'm getting frequent crashes (every approx 5 sec). Crashes stops when I'm not using hardware timer.

Here is the crash:

Code: Select all

state: 5 -> 2 (2c0)
rm 0
reconnect
state: 2 -> 0 (0)
f r0, scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 2
cnt

connected with TP-LINK 3, channel 4
dhcp client start...
ip:192.168.1.104,mask:255.255.255.0,gw:192.168.1.1
pm open,type:2 0
Fatal exception 0(IllegalInstructionCause):
epc1=0x40244cf8, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

 ets Jan  8 2013,rst cause:1, boot mode:(3,0)

load 0x40100000, len 29608, room 16
tail 8
chksum 0xf6
load 0x3ffe8000, len 884, room 0
tail 4
chksum 0x08
load 0x3ffe8380, len 784, room 4
tail 12
chksum 0xf3
csum 0xf3
r��l��ĞeStepper motor  init succesful
espconn_accept [0] !!!
mode : sta(18:fe:34:9b:96:fb)
add if0
f r-1, scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 2


Here is the initialization code:

Code: Select all

hw_timer_init(FRC1_SOURCE,0);
hw_timer_set_func(stepper_timer_cb);
hw_timer_arm(2500);


Here is the callback function:

Code: Select all

static void ICACHE_FLASH_ATTR stepper_timer_cb(void)
{
    if(!GPIO_INPUT_GET(step_pin)) gpio_output_set((1<<step_pin),0,0,0);
    else gpio_output_set(0,(1<<step_pin),0,0);
    hw_timer_arm(2500);
}


I also noticed that when the timer is not armed, the callback function still fires, approx every 0.5s. Looks like something else is triggering the interrupt.

Any help would be appreciated.

[ESP_Faye]

Hi,

Please delete the "ICACHE_FLASH_ATTR " before your hardware timer callback. The interrupt handler should not be stored in flash.

static void stepper_timer_cb(void)
{
...
}

Please have a try with the attachment, if your problem is still unsolved, please feel free to let us know.

[Goldpin]

Thanks a lot, it works now.

I deleted the "ICACHE_FLASH_ATTR", but this wasn't enough. But after replacing "hw_timer.c" from SDK with the file you provided it works perfectly!