1 files changed, 51 insertions, 0 deletions
diff --git a/app/adc.c b/app/adc.c
new file mode 100644
index 0000000..1565af5
--- /dev/null
+++ b/app/adc.c
@@ -0,0 +1,51 @@
+#include "project.h"
+
+int host_has_power;
+
+void
+adc_tick (void)
+{
+  uint16_t v;
+
+  if (adc_eoc (ADC1))
+    {
+      v = adc_read_regular (ADC1);
+
+      host_has_power = ! !(v > 1000);
+
+    }
+
+  adc_start_conversion_direct (ADC1);
+}
+
+
+
+static uint8_t channels[] = { ADC_CHANNEL0 };
+
+#define n_channels (sizeof(channels)/sizeof(channels[0]))
+
+void
+adc_init (void)
+{
+
+  rcc_periph_clock_enable (RCC_ADC1);
+
+  //gpio_mode_setup(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_DOWN, GPIO0);
+  gpio_set_mode (GPIOA, GPIO_MODE_INPUT, GPIO_CNF_INPUT_ANALOG, GPIO0);
+
+  adc_off (ADC1);
+  adc_disable_scan_mode (ADC1);
+  adc_set_single_conversion_mode (ADC1);
+  adc_disable_external_trigger_regular (ADC1);
+  adc_set_right_aligned (ADC1);
+  adc_set_sample_time_on_all_channels (ADC1, ADC_SMPR_SMP_28DOT5CYC);
+
+  adc_power_on (ADC1);
+
+  adc_reset_calibration (ADC1);
+  adc_calibration (ADC1);
+  adc_set_regular_sequence (ADC1, n_channels, channels);
+  adc_start_conversion_direct (ADC1);
+
+  host_has_power = 0;
+}