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author | Gregory Nutt <gnutt@nuttx.org> | 2014-06-23 12:19:50 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2014-06-23 12:19:50 -0600 |
commit | 19f6299b906d846250a647b214836caf4f3e44fc (patch) | |
tree | afccf4ce38f13c6e164e352186224cce2454420e /nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c | |
parent | 0ebbf0438116b8771e4ae2c06232b7828bfdaf45 (diff) | |
parent | 08d4aca769f4a4895522ffe93da32ea9a5995061 (diff) | |
download | nuttx-19f6299b906d846250a647b214836caf4f3e44fc.tar.gz nuttx-19f6299b906d846250a647b214836caf4f3e44fc.tar.bz2 nuttx-19f6299b906d846250a647b214836caf4f3e44fc.zip |
Merge remote-tracking branch 'origin/master' into netiob
Diffstat (limited to 'nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c')
-rw-r--r-- | nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c b/nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c new file mode 100644 index 000000000..88741fd0d --- /dev/null +++ b/nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c @@ -0,0 +1,152 @@ +/************************************************************************************ + * configs/lpcexpresso-lpc1768/up_pwm.c + * + * Copyright (C) 2014 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> + +#include <errno.h> +#include <debug.h> + +#include <nuttx/pwm.h> +#include <arch/board/board.h> + +#include "chip.h" +#include "up_arch.h" +#include "lpc17_pwm.h" +#include "lpc17_timer.h" +#include "lpcxpresso_internal.h" + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +#ifdef CONFIG_PWM + +FAR struct pwm_lowerhalf_s *lpc17_pwminitialize(int timer); +FAR struct pwm_lowerhalf_s *lpc17_mcpwminitialize(int timer); +FAR struct pwm_lowerhalf_s *lpc17_timerinitialize(int timer); + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: pwm_devinit + * + * Description: + * All LPC17 architectures must provide the following interface to work with + * examples/pwm. + * + ************************************************************************************/ + +int pwm_devinit(void) +{ + static bool initialized = false; + struct pwm_lowerhalf_s *pwm; + struct pwm_lowerhalf_s *mcpwm; + struct pwm_lowerhalf_s *timer; + int ret; + + /* Have we already initialized? */ + + if (!initialized) + { + /* Call lpc17_pwminitialize() to get an instance of the PWM interface */ + + pwm = lpc17_pwminitialize(0); + if (!pwm) + { + adbg("Failed to get the LPC17XX PWM lower half\n"); + return -ENODEV; + } + + /* Register the PWM driver at "/dev/pwm0" */ + + ret = pwm_register("/dev/pwm0", pwm); + if (ret < 0) + { + adbg("pwm_register failed: %d\n", ret); + return ret; + } + + mcpwm = lpc17_mcpwminitialize(0); + if (!mcpwm) + { + adbg("Failed to get the LPC17XX MOTOR PWM lower half\n"); + return -ENODEV; + } + + /* Register the MOTOR CONTROL PWM driver at "/dev/mcpwm0" */ + + ret = pwm_register("/dev/mcpwm0", mcpwm); + if (ret < 0) + { + adbg("mcpwm_register failed: %d\n", ret); + return ret; + } + + timer = lpc17_timerinitialize(0); + if (!timer) + { + adbg("Failed to get the LPC17XX TIMER lower half\n"); + return -ENODEV; + } + + /* Register the PWM driver at "/dev/timer0" */ + + ret = pwm_register("/dev/timer0", timer); + if (ret < 0) + { + adbg("timer_register failed: %d\n", ret); + return ret; + } + + /* Now we are initialized */ + + initialized = true; + } + + return OK; +} + +#endif /* CONFIG_PWM */ |