From b67ecdfeca2d1d5289e4c9b577a1940cf8702ab3 Mon Sep 17 00:00:00 2001
From: Fabio Utzig <utzig@utzig.org>
Date: Mon, 7 Mar 2016 12:33:00 -0300
Subject: [KINETIS] Move from main repo to contrib

---
 testhal/KINETIS/ADC/main.c | 132 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 testhal/KINETIS/ADC/main.c

(limited to 'testhal/KINETIS/ADC/main.c')

diff --git a/testhal/KINETIS/ADC/main.c b/testhal/KINETIS/ADC/main.c
new file mode 100644
index 0000000..f01051b
--- /dev/null
+++ b/testhal/KINETIS/ADC/main.c
@@ -0,0 +1,132 @@
+/*
+    ChibiOS - Copyright (C) 2014 Derek Mulcahy
+
+    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"
+
+#define ADC_GRP1_NUM_CHANNELS   2
+#define ADC_GRP1_BUF_DEPTH      1
+
+static adcsample_t samples1[ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH];
+
+static void adc_end_cb(ADCDriver *adcp, adcsample_t *buffer, size_t n) {
+
+  (void)adcp;
+  (void)n;
+
+  /*
+   * The bandgap value represents the ADC reading for 1.0V
+   */
+  uint16_t sensor = buffer[0];
+  uint16_t bandgap = buffer[1];
+
+  /*
+   * The v25 value is the voltage reading at 25C, it comes from the ADC
+   * electricals table in the processor manual. V25 is in millivolts.
+   */
+  int32_t v25 = 716;
+
+  /*
+   * The m value is slope of the temperature sensor values, again from
+   * the ADC electricals table in the processor manual.
+   * M in microvolts per degree.
+   */
+  int32_t m = 1620;
+
+  /*
+   * Divide the temperature sensor reading by the bandgap to get
+   * the voltage for the ambient temperature in millivolts.
+   */
+  int32_t vamb = (sensor * 1000) / bandgap;
+
+  /*
+   * This formula comes from the reference manual.
+   * Temperature is in millidegrees C.
+   */
+  int32_t delta = (((vamb - v25) * 1000000) / m);
+  int32_t temp = 25000 - delta;
+
+  if (temp < 19000) {
+    /* Turn just the Blue LED on if less than 19C */
+    palSetPad(GPIOB,18);    // Red
+    palSetPad(GPIOB,19);    // Green
+    palClearPad(GPIOD,1);   // Blue
+  } else if (temp > 28000) {
+    /* Turn just the Red LED on if greater than 28C */
+    palClearPad(GPIOB,18);  // Red
+    palSetPad(GPIOB,19);    // Green
+    palSetPad(GPIOD,1);     // Blue
+  } else {
+    /* Turn just the Green LED on if between 19C and 28C */
+    palSetPad(GPIOB,18);    // Red
+    palClearPad(GPIOB,19);  // Green
+    palSetPad(GPIOD,1);     // Blue
+  }
+}
+
+/*
+ * ADC conversion group.
+ * Mode:        Linear buffer, 8 samples of 1 channel, SW triggered.
+ */
+static const ADCConversionGroup adcgrpcfg1 = {
+  false,
+  ADC_GRP1_NUM_CHANNELS,
+  adc_end_cb,
+  NULL,
+  ADC_TEMP_SENSOR | ADC_BANDGAP,
+  /* CFG1 Regiser - ADCCLK = SYSCLK / 16, 16 bits per sample */
+  ADCx_CFG1_ADIV(ADCx_CFG1_ADIV_DIV_8) |
+    ADCx_CFG1_ADICLK(ADCx_CFG1_ADIVCLK_BUS_CLOCK_DIV_2) |
+    ADCx_CFG1_MODE(ADCx_CFG1_MODE_16_BITS),
+  /* SC3 Register - Average 32 readings per sample */
+  ADCx_SC3_AVGE |
+    ADCx_SC3_AVGS(ADCx_SC3_AVGS_AVERAGE_32_SAMPLES)
+};
+
+static const ADCConfig adccfg1 = {
+  /* Perform initial calibration */
+  true
+};
+
+/*
+ * 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 ADC1 driver.
+   */
+  adcStart(&ADCD1, &adccfg1);
+
+  while (1) {
+    /*
+     * ADC linear conversion.
+     */
+    adcConvert(&ADCD1, &adcgrpcfg1, samples1, ADC_GRP1_BUF_DEPTH);
+
+    chThdSleepMilliseconds(500);
+  }
+}
-- 
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