I2C hang recover function added
Dependencies: UniGraphic mbed vt100
In this version, check_i2c_pins function was added in edge_mgr.cpp.
プログラムの起動時、I2Cモジュールを初期化する前に、I2Cに使用するピンの電位を確認し
もし一方でも Low に張り付いていた場合、SCL を GPIO 出力に設定して
所定回数 (I2C_UNLOCK_TRIAL_CYCLE) 反転させることにより、疑似リセットクロックを生成します。
その後は、通常の起動手順に復帰し、以降はこれまでと同様の動作をします。
main.cpp
- Committer:
- gaku_miyagawa
- Date:
- 2018-06-18
- Revision:
- 2:de22987be9ba
- Parent:
- 0:d895cd1cd897
File content as of revision 2:de22987be9ba:
#include "mbed.h" #include "vt100.h" #include "afLib.h" #include "af_mgr.h" #include "edge_mgr.h" #include "edge_time.h" #include "edge_reset_mgr.h" /** * afero poc1.5 25-Dec-2017 version * from this version, watch dog timer joined again. */ vt100 *tty = 0 ; uint32_t wait_tolerance = 500 ; /* 5sec */ uint32_t connect_tolerance = 60 ; /* after 60 trials, reboot */ uint32_t wait_count = 0 ; uint32_t connect_trial_count = 0 ; /** * wait_connection * When gConnected == false, which is connection is lost. * Each 5sec check attribute ATTR_WIFI_STDY_STATE to see * if the connection has recovered. * Meantime even if connection is established communicated * data is invalid, so AF_SYSTEM_ASR_STATE is also * checked for gLinked ; * And in case connect_tolerance trials failed * try to reboot the system if it can improve the situation. */ void wait_connection(void) { int result ; wait_count++ ; if (wait_count > wait_tolerance) { reset_watch_dog() ; if (gConnected == false) { result = afero->getAttribute(ATTR_WIFI_STDY_STATE) ; if (result != afSUCCESS) { print_af_error(result) ; } } if (gLinked == false) { result = afero->getAttribute(AF_SYSTEM_ASR_STATE) ; if (result != afSUCCESS) { print_af_error(result) ; } } connect_trial_count++ ; if (connect_trial_count > connect_tolerance) { reboot_edge() ; } wait_count = 0 ; } } void init_hardware(void) { int i ; int result ; reset_watch_dog() ; init_display() ; reset_watch_dog() ; init_aflib() ; reset_watch_dog() ; init_sensors() ; reset_watch_dog() ; init_timer() ; while(true) { reset_watch_dog() ; for (i = 0 ; i < 10 ; i++ ) { afero->loop() ; reset_watch_dog() ; } if ((gLinked == true)&&(gConnected == true)) { wait_count = 0 ; connect_trial_count = 0 ; if (afero->isIdle()) { result = init_edge_attribute() ; if (result == 0) { break ; } } } else { /* gLinked == false */ wait_connection() ; } wait_ms(10) ; } do { // while(!afero->isIdle()) { reset_watch_dog() ; for (i = 0 ; i < 10 ; i++ ) { afero->loop() ; wait_ms(100) ; } } while(!afero->isIdle()) ; edge_mgr_status = EDGE_MGR_RUNNING ; } // main() runs in its own thread in the OS int main() { static uint32_t count_robin = 0 ; tty = new vt100() ; // tty->cls() ; printf("Afero test program (ver. %s) started\n", __DATE__) ; printf("=== Reset Reason ===\n") ; print_reset_reason() ; printf("====================\n") ; init_hardware() ; edge_splash() ; while (true) { count_robin++ ; afero->loop() ; if ((gLinked == true)&&(gConnected == true)) { wait_count = 0 ; connect_trial_count = 0 ; if (afero->isIdle()) { edge_loop(count_robin) ; } } else { /* gLinked == false */ wait_connection() ; } wait_ms(10) ; } }