1 files changed, 169 insertions, 0 deletions
diff --git a/app/ringer.c b/app/ringer.c
new file mode 100644
index 0000000..edaad24
--- /dev/null
+++ b/app/ringer.c
@@ -0,0 +1,169 @@
+#include "project.h"
+
+static int period;
+static int place;
+static int ringer_enabled=1;
+int ringing;
+
+
+#define C6 1047
+#define E6 1319
+
+static void
+buzzer_on (void)
+{
+  gpio_set_mode (GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
+                 GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_TIM1_CH1);
+  gpio_set_mode (GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
+                 GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_TIM1_CH1N);
+
+  timer_reset (TIM1);
+
+  timer_set_mode (TIM1, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_CENTER_1,
+                  TIM_CR1_DIR_UP);
+  timer_set_oc_mode (TIM1, TIM_OC1, TIM_OCM_PWM2);
+  timer_enable_oc_output (TIM1, TIM_OC1);
+  timer_enable_oc_output (TIM1, TIM_OC1N);
+  timer_enable_break_main_output (TIM1);
+
+  timer_set_oc_value (TIM1, TIM_OC1, period / 2);
+  timer_set_period (TIM1, period);
+
+  timer_enable_counter (TIM1);
+}
+
+static void
+buzzer_off (void)
+{
+  gpio_set_mode (GPIOA, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO8);
+  gpio_clear (GPIOA, GPIO8);
+  gpio_set_mode (GPIOB, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO13);
+  gpio_clear (GPIOB, GPIO13);
+  timer_disable_counter (TIM1);
+}
+
+static void
+buzzer_set_freq (int hz)
+{
+  period = (48000000 / 4) / hz;
+  timer_set_oc_value (TIM1, TIM_OC1, period / 2);
+  timer_set_period (TIM1, period);
+}
+
+static void
+buzzer_init (void)
+{
+
+  /*buzzer */
+  buzzer_off ();
+  buzzer_set_freq (440);
+
+}
+
+
+void
+ringer_tick (void)
+{
+  static int t;
+
+  if (!ringing)
+    return;
+  ringing--;
+
+  if (!ringing)
+    {
+      place = 0;
+      buzzer_off ();
+      return;
+    }
+
+
+
+  t++;
+  if (t < 50)
+    return;
+  t = 0;
+
+
+  switch (place)
+    {
+    case 1:
+    case 3:
+    case 5:
+    case 7:
+
+    case 13:
+    case 15:
+    case 17:
+    case 19:
+      place++;
+      buzzer_set_freq (C6);
+      break;
+
+    case 0:
+    case 12:
+      place++;
+      buzzer_set_freq (E6);
+      buzzer_on ();
+      break;
+    case 2:
+    case 4:
+    case 6:
+    case 14:
+    case 16:
+    case 18:
+      place++;
+      buzzer_set_freq (E6);
+      break;
+
+    case 8:
+    case 20:
+      place++;
+      buzzer_off ();
+      break;
+
+    default:
+      place++;
+      break;
+    case 59:
+      place = 0;
+    }
+
+
+
+
+}
+
+void
+ringer_off (void)
+{
+  place = 0;
+  ringing = 0;
+  buzzer_off ();
+}
+
+void
+ringer_ring (int l)
+{
+//mb();
+if (!ringer_enabled) return;
+  ringing = l;
+}
+
+void ringer_disable(void)
+{
+ringer_enabled=0;
+ringer_off();
+}
+
+void ringer_enable(void)
+{
+ringer_enabled=1;
+}
+
+
+
+void ringer_init(void)
+{
+buzzer_init();
+}