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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-11-19 15:42:58 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-11-19 15:42:58 +0000 |
| commit | 23c901559fcc310ca964f7db1a7f182e01c8ccd4 (patch) | |
| tree | ed6a6290a040658755f3e273137892a65959893c /testhal/STM32F4xx/PWM-ICU/main.c | |
| parent | cba1d7b4a73109eccedc5dc705ae20000ee8d17e (diff) | |
| download | ChibiOS-23c901559fcc310ca964f7db1a7f182e01c8ccd4.tar.gz ChibiOS-23c901559fcc310ca964f7db1a7f182e01c8ccd4.tar.bz2 ChibiOS-23c901559fcc310ca964f7db1a7f182e01c8ccd4.zip | |
PWM and ICU drivers tested on STM32F4xx.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3513 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'testhal/STM32F4xx/PWM-ICU/main.c')
| -rw-r--r-- | testhal/STM32F4xx/PWM-ICU/main.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/testhal/STM32F4xx/PWM-ICU/main.c b/testhal/STM32F4xx/PWM-ICU/main.c new file mode 100644 index 000000000..0979fc70d --- /dev/null +++ b/testhal/STM32F4xx/PWM-ICU/main.c @@ -0,0 +1,140 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ch.h"
+#include "hal.h"
+
+static void pwmpcb(PWMDriver *pwmp) {
+
+ (void)pwmp;
+ palClearPad(GPIOD, GPIOD_LED5);
+}
+
+static void pwmc1cb(PWMDriver *pwmp) {
+
+ (void)pwmp;
+ palSetPad(GPIOD, GPIOD_LED5);
+}
+
+static PWMConfig pwmcfg = {
+ 10000, /* 10KHz PWM clock frequency. */
+ 10000, /* Initial PWM period 1S. */
+ pwmpcb,
+ {
+ {PWM_OUTPUT_ACTIVE_HIGH, pwmc1cb},
+ {PWM_OUTPUT_DISABLED, NULL},
+ {PWM_OUTPUT_DISABLED, NULL},
+ {PWM_OUTPUT_DISABLED, NULL}
+ },
+ 0,
+};
+
+icucnt_t last_width, last_period;
+
+static void icuwidthcb(ICUDriver *icup) {
+
+ palSetPad(GPIOD, GPIOD_LED4);
+ last_width = icuGetWidthI(icup);
+}
+
+static void icuperiodcb(ICUDriver *icup) {
+
+ palClearPad(GPIOD, GPIOD_LED4);
+ last_period = icuGetPeriodI(icup);
+}
+
+static ICUConfig icucfg = {
+ ICU_INPUT_ACTIVE_HIGH,
+ 10000, /* 10KHz ICU clock frequency. */
+ icuwidthcb,
+ icuperiodcb
+};
+
+/*
+ * 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();
+
+ /*
+ * Initializes the PWM driver 2 and ICU driver 3.
+ * GPIOA15 is the PWM output.
+ * GPIOC6 is the ICU input.
+ * The two pins have to be externally connected together.
+ */
+ pwmStart(&PWMD2, &pwmcfg);
+ palSetPadMode(GPIOA, 15, PAL_MODE_ALTERNATE(1));
+ icuStart(&ICUD3, &icucfg);
+ palSetPadMode(GPIOC, 6, PAL_MODE_ALTERNATE(2));
+ icuEnable(&ICUD3);
+ chThdSleepMilliseconds(2000);
+
+ /*
+ * Starts the PWM channel 0 using 75% duty cycle.
+ */
+ pwmEnableChannel(&PWMD2, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD2, 7500));
+ chThdSleepMilliseconds(5000);
+
+ /*
+ * Changes the PWM channel 0 to 50% duty cycle.
+ */
+ pwmEnableChannel(&PWMD2, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD2, 5000));
+ chThdSleepMilliseconds(5000);
+
+ /*
+ * Changes the PWM channel 0 to 25% duty cycle.
+ */
+ pwmEnableChannel(&PWMD2, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD2, 2500));
+ chThdSleepMilliseconds(5000);
+
+ /*
+ * Changes PWM period to half second the duty cycle becomes 50%
+ * implicitly.
+ */
+ pwmChangePeriod(&PWMD2, 5000);
+ chThdSleepMilliseconds(5000);
+
+ /*
+ * Disables channel 0 and stops the drivers.
+ */
+ pwmDisableChannel(&PWMD2, 0);
+ pwmStop(&PWMD2);
+ icuDisable(&ICUD3);
+ icuStop(&ICUD3);
+ palClearPad(GPIOD, GPIOD_LED4);
+ palClearPad(GPIOD, GPIOD_LED5);
+
+ /*
+ * Normal main() thread activity, in this demo it does nothing.
+ */
+ while (TRUE) {
+ chThdSleepMilliseconds(500);
+ }
+ return 0;
+}
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