Trying use RTX mailbox I find it not robust. For some reason some messages can't be received by recipient and mailbox quickly becomes full. To find problem I use slightly modified demo program C:\Keil\ARM\RL\RTX\Examples\Mailbox Reason for the modification - use LED for output. This demo program does not work on real STR912FW44. Receiver never takes message from sender. Does somebody use RTX mailbox for the STR9x? Is it some special in the RTX_Config file or STR91x startup file? Followed is my test code that is slightly modified example code. I use V3.20 RTX. Thanks in advance.
/* ******************************************************** Name: Main.c Rev. used: V3.20 Chip: STM912FW44 ******************************************************** */ #include <rtl.h> #include <91x_lib.h> OS_TID idInitTask; OS_TID idRecTask; #define MAILBOX_MSG 35 /* command in the message */ typedef struct /* message object structure */ { int imbCommand; int iXBeg; }msgB; os_mbx_declare(malBx, 20); /* an RTX mailbox */ _declare_box(poolS, sizeof(msgB), 20); /* mem pool */ extern void InitializeHardware(void); /* IO pin for LED */ void InitTask(void) __task; void RecTask(void) __task; /* ****************************************************** RTX Kernel starts this task with os_sys_init ****************************************************** */ void InitTask(void) __task { msgB* msg; OS_RESULT res; idInitTask = os_tsk_self(); /* get own ID */ idRecTask = os_tsk_create(RecTask, 7);/* start task */ os_mbx_init(malBx, sizeof(malBx)); /* mailbox init */ os_dly_wait(5); msg = (msgB*)_alloc_box(poolS); /* alloc mem */ if(msg != NULL) { res = os_mbx_check(malBx); /* check room */ if(res != 0) { msg->imbCommand = MAILBOX_MSG; /* set conyent */ msg->iXBeg = 3; /* set LED off */ os_mbx_send(malBx, msg, 0); } } os_dly_wait (100); /* some delay */ msg = (msgB*)_alloc_box(poolS); /* second msg */ if(msg != NULL) { res = os_mbx_check(malBx); if(res != 0) { msg->imbCommand = MAILBOX_MSG; msg->iXBeg = 2; /* set LED ON */ os_mbx_send(malBx, msg, 0); } } os_tsk_pass (); /* Cooperative multitasking */ os_dly_wait (100); /* some delay */ os_tsk_delete_self(); /* delete self */ } /*----------------------------------------------------------- * RTX Kernel starts this task with os_tsk_create *---------------------------------------------------------*/ void RecTask(void) __task { msgB* msg; OS_RESULT res; for(;;) { res = os_mbx_wait(malBx, (void**)&msg, 0xFFFF); if(res == OS_R_OK) { switch(msg->imbCommand) { case MAILBOX_MSG: if((msg->iXBeg % 2) != 0) GPIO_WriteBit(GPIO6, GPIO_Pin_2, Bit_SET); /* LED OFF */ else GPIO_WriteBit(GPIO6, GPIO_Pin_2, Bit_RESET);/*LED ON */ break; } _free_box(poolS, msg); /* free memory */ } } } /* ************************************** Initialize and start RTX ************************************** */ int main() { InitializeHardware(); /* init IO */ _init_box(poolS, /* init pool */ sizeof(poolS), sizeof(msgB)); os_sys_init(InitTask); /* Init RTX and start task */ while(1) os_tsk_pass(); }