From 7437bfef11387f1521f8c33e81885e186b583626 Mon Sep 17 00:00:00 2001
From: Theodore Ateba <tf.ateba@gmail.com>
Date: Wed, 16 Aug 2017 06:39:57 +0000
Subject: Add a specific directory for AVR MEGA in the testhal.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10436 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 testhal/AVR/MEGA/ADC/main.c | 123 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 testhal/AVR/MEGA/ADC/main.c

(limited to 'testhal/AVR/MEGA/ADC/main.c')

diff --git a/testhal/AVR/MEGA/ADC/main.c b/testhal/AVR/MEGA/ADC/main.c
new file mode 100644
index 000000000..7d014492c
--- /dev/null
+++ b/testhal/AVR/MEGA/ADC/main.c
@@ -0,0 +1,123 @@
+/*
+    ChibiOS - Copyright (C) 2016 Theodore Ateba
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#include "ch.h"
+#include "hal.h"
+#include "chprintf.h"
+
+/*
+ * In this demo we use a single channel to sample voltage across
+ * a potentiometer.
+ */
+#define MY_NUM_CH           1
+#define MY_SAMPLING_NUMBER  10
+
+/**
+ * @brief Global variables
+ */
+BaseSequentialStream * chp = (BaseSequentialStream *) &SD1;
+static int32_t  adcConvA0 = 0;      /**< A0 adc conversion. */
+static float    voltageA0 = 0;      /**< A0 voltage.        */
+static adcsample_t sample_buff[MY_NUM_CH * MY_SAMPLING_NUMBER];
+
+/*
+ * ADC conversion group.
+ * Mode:        Linear buffer, 10 samples of 1 channel, SW triggered.
+ * Channels:    IN0 (Arduino Pin A0).
+ */
+static const ADCConversionGroup my_conversion_group = {
+  FALSE,      /* Not circular buffer.       */
+  MY_NUM_CH,  /* Number of channels.        */
+  NULL,       /* No ADC callback function.  */
+  1,          /* Channel mask.              */
+};
+
+static const ADCConfig adcConfig = {
+  ANALOG_REFERENCE_AVCC, /* Analog reference. */
+};
+
+static THD_WORKING_AREA(waThd1, 32);
+static THD_FUNCTION(Thd1, arg) {
+  (void) arg;
+  chRegSetThreadName("LED Thread");
+
+  while (true) {
+    palTogglePad(IOPORT2, PORTB_LED1);
+    chThdSleepMilliseconds(1000);
+  }
+}
+
+static THD_WORKING_AREA(waThd2, 512);
+static THD_FUNCTION(Thd2, arg) {
+
+  unsigned i;
+  (void) arg;
+  chRegSetThreadName("ADC1 Thread");
+
+  /* Activates the ADC1 driver. */
+  adcStart(&ADCD1, &adcConfig);
+
+  while (TRUE) {
+    /* Make ADC conversion of the voltage on A0. */
+    adcConvert(&ADCD1, &my_conversion_group, sample_buff, MY_SAMPLING_NUMBER);
+    
+    /* Making mean of sampled values.*/
+    for (i = 0; i < MY_NUM_CH * MY_SAMPLING_NUMBER; i++) {
+      adcConvA0 += sample_buff[i];
+    }
+
+    adcConvA0 /= (MY_NUM_CH * MY_SAMPLING_NUMBER);
+    voltageA0 = (((float)adcConvA0 * 5) / 1024);
+  }
+}
+
+/*
+ * Application entry point.
+ */
+int main(void) {
+
+  /*
+   * System initializations.
+   * - HAL initialization, this also initializes the configured device drivers
+   *   and performs the board-specific initializations.
+   * - Kernel initialization, the main() function becomes a thread and the
+   *   RTOS is active.
+   */
+  halInit();
+  chSysInit();
+
+ /*
+  * Initialized the serial driver an turn off the onboard debug led.
+  */
+  sdStart(&SD1, NULL);
+  palClearPad(IOPORT2, PORTB_LED1);
+
+  /*
+   * Starts the LED blinker thread.
+   */
+  chThdCreateStatic(waThd1, sizeof(waThd1), NORMALPRIO + 1, Thd1, NULL);
+  chThdCreateStatic(waThd2, sizeof(waThd2), NORMALPRIO + 1, Thd2, NULL);
+
+  chprintf(chp, "AVR ADC program example... \r\n");
+  
+  while (TRUE) {
+    chprintf(chp, "Measure the voltage on A0 pin: \r\n");
+    chprintf(chp, "   %.3fv \r\n", voltageA0);
+    chThdSleepMilliseconds(100);
+    chprintf(chp, "\033[2J\033[1;1H");
+  }
+}
+
-- 
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