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。
Diff: edge_sensor/edge_temp.cpp
- Revision:
- 0:d895cd1cd897
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/edge_sensor/edge_temp.cpp Tue Apr 03 08:30:29 2018 +0000 @@ -0,0 +1,143 @@ +#include "mbed.h" +#include "LM75B.h" +#include "edge_reset_mgr.h" +#include "edge_sensor.h" +#include "edge_temp.h" +#include "edge_chart.h" + +float *current_temp = 0 ; + +edge_temp::edge_temp(LM75B *temp1, SMTC502AT *temp2, SMTC502AT *temp3, LM75B *temp4) +{ + _temp1 = temp1 ; + _temp2 = temp2 ; + _temp3 = temp3 ; + _temp4 = temp4 ; + _ftemp[0] = _ftemp[1] = _ftemp[2] = _ftemp[3] = 0.0 ; + _interval = 30 ; + current_temp = &_ftemp[1] ; /* use before for current temp */ +} + +edge_temp::~edge_temp(void) +{ + if (_temp1) { + delete _temp1 ; + } + if (_temp2) { + delete _temp2 ; + } + if (_temp3) { + delete _temp3 ; + } + if (_temp4) { + delete _temp4 ; + } +} + +void edge_temp::reset(void) +{ +} + +void edge_temp::prepare(void) +{ +} + +int edge_temp::sample(void) +{ + int result ; + if (_temp1) { + result = _temp1->getTemp(&_ftemp[0]) ; + } + if (_temp2) { + _ftemp[1] = _temp2->getTemp() ; + } + if (_temp3) { + _ftemp[2] = _temp3->getTemp() ; + } + if (_temp4) { + _temp4->getTemp(&_ftemp[3]) ; + } + _sampled_time = edge_time ; + return( result ) ; +} + +int edge_temp::deliver(void) +{ + int result ; + char timestr[16] ; + + print_time() ; + printf(" temp: ") ; + if (_temp1) { + printf("LM75B1 = %.2f ", _ftemp[0]) ; + } + if (_temp2) { + printf("before = %.2f ", _ftemp[1]) ; + } + if (_temp3) { + printf("after = %.2f ", _ftemp[2]) ; + } + if (_temp4) { + printf("LM75B2 = %.2f ", _ftemp[3]) ; + } + printf("\n") ; + time2seq(_sampled_time, timestr) ; + sprintf(_str_buf, + "{\"DEVICE\":\"TEMP04\",\"VAL_1\":\"%.1f\",\"VAL_2\":\"%.1f\",\"VAL_3\":\"%.1f\",\"T\":\"%s\",\"E\":\"%d\"}", + _ftemp[0], _ftemp[1], _ftemp[2], timestr, _error_count) ; + result = afero->setAttribute(1, _str_buf) ; + return( result == afSUCCESS ) ; +} + +int temp_v2y(float value, edge_chart_type *p) +{ + int y ; + if (value < p->min) { + value = p->min ; + } else if (value > p->max) { + value = p->max ; + } + y = p->top + p->height - 1 + - (int)((p->height - 2) * (value - p->min) /(p->max - p->min)) ; + return( y ) ; +} + +void edge_temp::show(void) +{ + edge_chart_type *p = &edge_chart[ _id ] ; + int x, temp, before, after ; + reset_watch_dog() ; + if (display) { + switch(display_mode) { + case DISPLAY_MODE_SUMMARY: + display->BusEnable(true) ; + display->set_font((unsigned char*) Arial12x12); + display->set_font_zoom(2, 2) ; + display->foreground(White) ; + display->locate(EDGE_SUMMARY_X, EDGE_SUMMARY_TIME_Y) ; + displayTime(_sampled_time) ; + display->locate(EDGE_SUMMARY_X, EDGE_SUMMARY_TEMP_Y) ; + display->printf("Temp : %.2f %.2f %.2f",_ftemp[0], _ftemp[1], _ftemp[2]) ; + display->BusEnable(false) ; + reset_watch_dog() ; + break ; + case DISPLAY_MODE_CHART: + x = p->left + p->index + 1; + temp = temp_v2y(_ftemp[0], p) ; + before = temp_v2y(_ftemp[1], p) ; + after = temp_v2y(_ftemp[2], p) ; + display->BusEnable(true) ; + if (p->index == 0) { + draw_chart_frame(p) ; + } + display->pixel(x, temp, White) ; + display->pixel(x, before, Red) ; + display->pixel(x, after, Blue) ; + display->BusEnable(false) ; + p->index = (p->index + 1) % (p->width - 2) ; + break ; + } + } + reset_watch_dog() ; +} +