Diff: main.cpp

Revision:

0:cfd72179902b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 27 07:21:28 2018 +0000
@@ -0,0 +1,63 @@
+#include "mbed.h"
+
+Ticker      tick10ms;
+DigitalIn   sw(dp26);
+PwmOut      pwmled(dp24);
+DigitalOut  myled(LED1);
+
+Serial pc(dp16, dp15);
+
+static uint8_t sw_state = 0;
+static bool sw_on = 0;
+
+/* 10ms間隔で呼び出すハンドラ */
+void tick10ms_proc(void)
+{
+    /* 直近8回のスイッチON/OFF状態を保持 */
+    sw_state <<= 1;
+    sw_state &= 0xfe;
+    sw_state |= (sw & 0x01);
+
+    switch (sw_state) {
+        case 0x00:  /* 8回連続OFF */
+            sw_on = 0;
+            break;
+        case 0xff:  /* 8回連続ON */
+            sw_on = 1;
+            break;   
+    }
+}
+
+int main() {
+    uint8_t led_lv = 0;
+    uint8_t prev_sw = 0;
+    uint8_t sw_val = 0;
+    
+    myled = 0;
+    
+    pc.baud(9600);
+    pc.printf("Start.\r\n");
+    
+    /* 10ms間隔のハンドラを登録 */
+    tick10ms.attach_us(tick10ms_proc, 10000);
+
+    /* PWMの周波数を10kHzに設定 */
+    pwmled.period(0.01);
+    pwmled = 0.0;
+
+    while(1) {
+        /* スイッチ状態を読み出し */
+        __disable_irq();
+        sw_val = sw_on;
+        __enable_irq();
+        
+        /* スイッチON→OFFに変化 */
+        if ((prev_sw == 1) && (sw_val == 0)) {
+            led_lv = (led_lv + 1) % (5 + 1);    //LED出力を6段階に変化させる
+            pwmled = (float)led_lv * 0.2;
+            
+            pc.printf("PUSHED: led_lv=%d\r\n", led_lv);
+        }
+        prev_sw = sw_val;
+    }
+}