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| author | Theodore Ateba <tf.ateba@gmail.com> | 2017-08-16 06:39:57 +0000 |
|---|---|---|
| committer | Theodore Ateba <tf.ateba@gmail.com> | 2017-08-16 06:39:57 +0000 |
| commit | 7437bfef11387f1521f8c33e81885e186b583626 (patch) | |
| tree | ae0bf0f0b0cb535fbcfd37114f22e641705a42ff /testhal/AVR/MEGA/ADC/main.c | |
| parent | 47461741eda79dd6096093d9b5474190d03ca8ce (diff) | |
| download | ChibiOS-7437bfef11387f1521f8c33e81885e186b583626.tar.gz ChibiOS-7437bfef11387f1521f8c33e81885e186b583626.tar.bz2 ChibiOS-7437bfef11387f1521f8c33e81885e186b583626.zip | |
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
Diffstat (limited to 'testhal/AVR/MEGA/ADC/main.c')
| -rw-r--r-- | testhal/AVR/MEGA/ADC/main.c | 123 |
1 files changed, 123 insertions, 0 deletions
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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