![](/media/cache/group/logo-cachanx.jpg.50x50_q85.jpg)
Purpose: Simple application example with 2 threads and mutual-exclusion (Mutex) to a shared ressource (a bargraph).
Dependencies: IHM_V2
Purpose: Simple application example with 2 threads and mutual-exclusion (Mutex) to a shared ressource (a bargraph).
Target: L432KC / Nboard (from IUT-Cachan) Tested: YES (2019-01-09) Author: Jacques-Olivier Klein - IUT de CACHAN Date: 2018-02-10 rev. 2019-01-09 OS_STACK_SIZE=4096 Libraries: mbed-os rev5345:c966348(03jan2019) + IHMV2 (from IUT-Cachan) rev6:ad91067
main.cpp
- Committer:
- jacquesolivierklein
- Date:
- 2018-02-11
- Revision:
- 27:3780dd84a543
- Parent:
- 22:af9dcf379926
- Child:
- 29:8b329367eec8
File content as of revision 27:3780dd84a543:
// Title: mbed-os-mutex // Author: Jacques-Olivier Klein - IUT de CACHAN // Date: 2018-02-10 #include "mbed.h" #include "IHM.h" IHM ihm; DigitalOut L0 (PB_3) ; // led L0 DigitalOut L1 (PA_7) ; // led L1 DigitalOut L2 (PA_6) ; // led L2 void bargraph_up_counter(); void bargraph_down_counter(); Mutex bargraph_mutex; Thread Thread_bargraph_up_counter; Thread Thread_bargraph_down_counter; int main(void) { ihm.LCD_clear(); ihm.LCD_printf("Mutex-%s %s",__DATE__,__TIME__); printf("\n\rmbed-os-mutex-%s %s\n\r",__DATE__,__TIME__); printf(" DEFAULT_STACK_SIZE:%d\n\r", DEFAULT_STACK_SIZE); Thread_bargraph_up_counter.start(bargraph_up_counter); Thread_bargraph_down_counter.start(bargraph_down_counter); while(1){ Thread::wait(4000); L0=!L0; printf(" [pid-%d]Main \n\r",Thread::gettid()); } } void bargraph_up_counter(){ static int up_counter = 1; while(1){ bargraph_mutex.lock(); L1=1; for(up_counter = 1; up_counter != 0xFF; up_counter = (up_counter<<1)|1){ ihm.BAR_set(up_counter); Thread::wait(200); } bargraph_mutex.unlock(); L1=0; } } void bargraph_down_counter(){ static int down_counter = 1; while(1){ bargraph_mutex.lock(); L2=1; for(down_counter = 0x80; down_counter != 0xFF; down_counter = (down_counter>>1)|0x80){ ihm.BAR_set(down_counter); Thread::wait(200); } bargraph_mutex.unlock(); L2=0; } }