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author | Fabio Utzig <utzig@utzig.org> | 2016-03-28 20:37:57 -0300 |
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committer | Fabio Utzig <utzig@utzig.org> | 2016-03-28 20:37:57 -0300 |
commit | 341cad14a9ca8c2ed6b8a8b3a7e7183c71e00e70 (patch) | |
tree | 4bae5eb90713a09dd408121c5c35596df27be8f2 /testhal/KINETIS/TEENSY3_x/ADC/main.c | |
parent | 778340c65318a9935a2f937ff520a32397fd07ad (diff) | |
parent | ac8960f1a83ea19645ca969e6c525defd8f47ff7 (diff) | |
download | ChibiOS-Contrib-341cad14a9ca8c2ed6b8a8b3a7e7183c71e00e70.tar.gz ChibiOS-Contrib-341cad14a9ca8c2ed6b8a8b3a7e7183c71e00e70.tar.bz2 ChibiOS-Contrib-341cad14a9ca8c2ed6b8a8b3a7e7183c71e00e70.zip |
[KINETIS] A lot of updates
Diffstat (limited to 'testhal/KINETIS/TEENSY3_x/ADC/main.c')
-rw-r--r-- | testhal/KINETIS/TEENSY3_x/ADC/main.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/testhal/KINETIS/TEENSY3_x/ADC/main.c b/testhal/KINETIS/TEENSY3_x/ADC/main.c new file mode 100644 index 0000000..7a2dc3a --- /dev/null +++ b/testhal/KINETIS/TEENSY3_x/ADC/main.c @@ -0,0 +1,135 @@ +/*
+ ChibiOS - Copyright (C) 2015 RedoX https://github.com/RedoXyde
+
+ 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 "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 virtual_timer_t vt;
+
+static void ledoff(void *p) {
+
+ (void)p;
+ palClearPad(TEENSY_PIN13_IOPORT, TEENSY_PIN13);
+}
+
+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;
+
+ palSetPad(TEENSY_PIN13_IOPORT, TEENSY_PIN13);
+ chSysLockFromISR();
+ chVTResetI(&vt);
+ if (temp < 19000) {
+ chVTSetI(&vt, MS2ST(10), ledoff, NULL);
+ } else if (temp > 28000) {
+ chVTSetI(&vt, MS2ST(20), ledoff, NULL);
+ } else {
+ chVTSetI(&vt, MS2ST(40), ledoff, NULL);
+ }
+ chSysUnlockFromISR();
+}
+
+
+/*
+ * 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 (!chThdShouldTerminateX()) {
+ /*
+ * ADC linear conversion.
+ */
+ adcConvert(&ADCD1, &adcgrpcfg1, samples1, ADC_GRP1_BUF_DEPTH);
+
+ chThdSleepMilliseconds(1000);
+ }
+
+ return 0;
+}
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