From 57ae92953ae0ad456e2a9aecd22b9277cae8ee37 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Sun, 16 Aug 2015 10:10:58 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8221
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 testhal/STM32/STM32F7xx/GPT-ADC/main.c | 166 +++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 testhal/STM32/STM32F7xx/GPT-ADC/main.c

(limited to 'testhal/STM32/STM32F7xx/GPT-ADC/main.c')

diff --git a/testhal/STM32/STM32F7xx/GPT-ADC/main.c b/testhal/STM32/STM32F7xx/GPT-ADC/main.c
new file mode 100644
index 000000000..1f65197c3
--- /dev/null
+++ b/testhal/STM32/STM32F7xx/GPT-ADC/main.c
@@ -0,0 +1,166 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+    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"
+
+/*===========================================================================*/
+/* GPT driver related.                                                       */
+/*===========================================================================*/
+
+/*
+ * GPT4 configuration. This timer is used as trigger for the ADC.
+ */
+static const GPTConfig gpt4cfg1 = {
+  frequency:    1000000U,
+  callback:     NULL,
+  cr2:          TIM_CR2_MMS_1,  /* MMS = 010 = TRGO on Update Event.        */
+  dier:         0U
+};
+
+/*===========================================================================*/
+/* ADC driver related.                                                       */
+/*===========================================================================*/
+
+#define ADC_GRP1_NUM_CHANNELS   2
+#define ADC_GRP1_BUF_DEPTH      64
+
+static adcsample_t samples1[ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH];
+
+/*
+ * ADC streaming callback.
+ */
+size_t nx = 0, ny = 0;
+static void adccallback(ADCDriver *adcp, adcsample_t *buffer, size_t n) {
+
+  (void)adcp;
+
+  /* Updating counters.*/
+  if (samples1 == buffer) {
+    nx += n;
+  }
+  else {
+    ny += n;
+  }
+}
+
+/*
+ * ADC errors callbaack, should never happen.
+ */
+static void adcerrorcallback(ADCDriver *adcp, adcerror_t err) {
+
+  (void)adcp;
+  (void)err;
+}
+
+/*
+ * ADC conversion group.
+ * Mode:        Continuous, 16 samples of 2 channels, HS triggered by
+ *              GPT4-TRGO.
+ * Channels:    Sensor, VRef.
+ */
+static const ADCConversionGroup adcgrpcfg1 = {
+  true,
+  ADC_GRP1_NUM_CHANNELS,
+  adccallback,
+  adcerrorcallback,
+  0,                                                    /* CR1 */
+  ADC_CR2_EXTEN_RISING | ADC_CR2_EXTSEL_SRC(12),        /* CR2 */
+  ADC_SMPR1_SMP_SENSOR(ADC_SAMPLE_144) | ADC_SMPR1_SMP_VREF(ADC_SAMPLE_144),
+  0,                                                    /* SMPR2 */
+  ADC_SQR1_NUM_CH(ADC_GRP1_NUM_CHANNELS),               /* SQR1 */
+  0,                                                    /* SQR1 */
+  ADC_SQR3_SQ2_N(ADC_CHANNEL_SENSOR) | ADC_SQR3_SQ1_N(ADC_CHANNEL_VREFINT)
+};
+
+/*===========================================================================*/
+/* Application code.                                                         */
+/*===========================================================================*/
+
+/*
+ * This is a periodic thread that does absolutely nothing except flashing
+ * a LED attached to TP1.
+ */
+static THD_WORKING_AREA(waThread1, 128);
+static THD_FUNCTION(Thread1, arg) {
+
+  (void)arg;
+  chRegSetThreadName("blinker");
+  palSetPadMode(GPIOI, GPIOI_ARD_D13, PAL_MODE_OUTPUT_PUSHPULL);
+  while (true) {
+    palSetPad(GPIOI, GPIOI_ARD_D13);
+    chThdSleepMilliseconds(500);
+    palClearPad(GPIOI, GPIOI_ARD_D13);
+    chThdSleepMilliseconds(500);
+  }
+}
+
+/*
+ * 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();
+
+  /*
+   * Activates the serial driver 1 using the driver default configuration.
+   */
+  sdStart(&SD1, NULL);
+
+  /*
+   * Starting GPT4 driver, it is used for triggering the ADC.
+   */
+  gptStart(&GPTD4, &gpt4cfg1);
+
+  /*
+   * Fixed an errata on the STM32F7xx, the DAC clock is required for ADC
+   * triggering.
+   */
+  rccEnableDAC1(false);
+
+  /*
+   * Activates the ADC1 driver and the temperature sensor.
+   */
+  adcStart(&ADCD1, NULL);
+  adcSTM32EnableTSVREFE();
+
+  /*
+   * Starts an ADC continuous conversion triggered with a period of
+   * 1/10000 second.
+   */
+  adcStartConversion(&ADCD1, &adcgrpcfg1, samples1, ADC_GRP1_BUF_DEPTH);
+  gptStartContinuous(&GPTD4, 100);
+
+  /*
+   * Creates the example thread.
+   */
+  chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
+
+  /*
+   * Normal main() thread activity, in this demo it does nothing.
+   */
+  while (true) {
+    chThdSleepMilliseconds(500);
+  }
+}
-- 
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