Edit: evidently "struct k_thread my_thread_data_1;" has to be defined outside of the function? That seems to solve the problem, although "struct k_thread my_thread_data_0;" works inside main()... If that is correct, then I solved the problem but I am surprised "struct k_thread" can be defined both inside and outside of a function, sometimes work and sometimes not?
I am able to create and start a thread from main(), but when I start a identical thread from a function I get an error?
It seems happy to create the thread in the function as long as I don't start it.
I chose to use k_thread_create() instead of K_THREAD_DEFINE() because
- I don't need the thread unless an input matches a select-case statement.
- Eventually, I wish to reuse the thread after is has expired...
# If CONFIG_USERSPACE is enabled, aborting a thread will additionally mark the thread and stack objects as uninitialized so that they may be re-used.
CONFIG_USERSPACE=y
But it there is a better way of doing this I am open to suggestions.
ASSERTION FAIL @ WEST_TOPDIR/zephyr/arch/arm/core/aarch32/mpu/arm_core_mpu.c:287
E: r0/a1: 0x00000004 r1/a2: 0x0000011f r2/a3: 0x00000001
E: r3/a4: 0x0000000e r12/ip: 0x200014b0 r14/lr: 0x00001d3f
E: xpsr: 0x6100000e
E: Faulting instruction address (r15/pc): 0x00009cc6
E: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
E: Fault during interrupt handling
E: Current thread: 0x200013f0 (unknown)
E: Resetting system*** Booting nRF Connect SDK v2.5.1 ***
#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);
#define MY_STACK_SIZE 500
#define THREAD_PRIORITY 5
K_THREAD_STACK_DEFINE(dyn_thread_stack_0, MY_STACK_SIZE);
K_THREAD_STACK_DEFINE(dyn_thread_stack_1, MY_STACK_SIZE);
extern void my_entry_point_0(void *, void *, void *){
LOG_INF("my_entry_point_0");
};
extern void my_entry_point_1(void *, void *, void *){
LOG_INF("my_entry_point_1");
}
void create_thread_from_function()
{
struct k_thread my_thread_data_1;
k_tid_t my_tid = k_thread_create(&my_thread_data_1, dyn_thread_stack_1,
K_THREAD_STACK_SIZEOF(dyn_thread_stack_1),
my_entry_point_1,
NULL, NULL, NULL,
THREAD_PRIORITY, 0, K_FOREVER);
k_thread_start(my_tid); //this line causes error
/*
ASSERTION FAIL @ WEST_TOPDIR/zephyr/arch/arm/core/aarch32/mpu/arm_core_mpu.c:287
E: r0/a1: 0x00000004 r1/a2: 0x0000011f r2/a3: 0x00000001
E: r3/a4: 0x0000000e r12/ip: 0x200014b0 r14/lr: 0x00001d3f
E: xpsr: 0x6100000e
E: Faulting instruction address (r15/pc): 0x00009cc6
E: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
E: Fault during interrupt handling
E: Current thread: 0x200013f0 (unknown)
E: Resetting system*** Booting nRF Connect SDK v2.5.1 ***
*/
}
int main(void)
{
printk("main() Simulator\n");
struct k_thread my_thread_data_0;
k_thread_create(&my_thread_data_0, dyn_thread_stack_0,
K_THREAD_STACK_SIZEOF(dyn_thread_stack_0),
my_entry_point_0,
NULL, NULL, NULL,
THREAD_PRIORITY, 0, K_NO_WAIT);
create_thread_from_function();
k_msleep(10000);
return 0;
}
