From 83099864f26724adda0ccfacdc1a865f741cdfe3 Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Wed, 6 Nov 2013 14:38:19 -0600 Subject: SAMA5D3x-EK: Add support board-specific PWM testing --- nuttx/configs/sama5d3x-ek/src/sam_pwm.c | 161 ++++++++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100644 nuttx/configs/sama5d3x-ek/src/sam_pwm.c (limited to 'nuttx/configs/sama5d3x-ek/src/sam_pwm.c') diff --git a/nuttx/configs/sama5d3x-ek/src/sam_pwm.c b/nuttx/configs/sama5d3x-ek/src/sam_pwm.c new file mode 100644 index 000000000..90216f4f2 --- /dev/null +++ b/nuttx/configs/sama5d3x-ek/src/sam_pwm.c @@ -0,0 +1,161 @@ +/************************************************************************************ + * configs/sama5d3x-ek/src/sam_pwm.c + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 + +#include +#include +#include + +#include +#include + +#include "sam_pwm.h" +#include "sama5d3x-ek.h" + +/************************************************************************************ + * Definitions + ************************************************************************************/ +/* Configuration ********************************************************************/ +/* PWM. There are no dedicated PWM output pins available to the user for PWM + * testing. Care must be taken because all PWM output pins conflict with some other + * usage of the pin by other devices: + * + * -----+---+---+----+-------------------- + * PWM PIN PER PIO CONFLICTS + * -----+---+---+----+-------------------- + * PWM0 FI B PC28 SPI1, ISI + * H B PB0 GMAC + * B PA20 LCDC, ISI + * L B PB1 GMAC + * B PA21 LCDC, ISI + * -----+---+---+----+-------------------- + * PWM1 FI B PC31 HDMI + * H B PB4 GMAC + * B PA22 LCDC, ISI + * L B PB5 GMAC + * B PE31 ISI, HDMI + * B PA23 LCDC, ISI + * -----+---+---+----+-------------------- + * PWM2 FI B PC29 UART0, ISI, HDMI + * H C PD5 HSMCI0 + * B PB8 GMAC + * L C PD6 HSMCI0 + * B PB9 GMAC + * -----+---+---+----+-------------------- + * PWM3 FI C PD16 SPI0, Audio + * H C PD7 HSMCI0 + * B PB12 GMAC + * L C PD8 HSMCI0 + * B PB13 GMAC + * -----+---+---+----+-------------------- + */ + +#ifndef CONFIG_SAMA5D3X_EK_CHANNEL +# if defined(CONFIG_SAMA5_PWM_CHAN0) +# warning Assuming PWM channel 0 +# define CONFIG_SAMA5D3X_EK_CHANNEL 0 +# elif defined(CONFIG_SAMA5_PWM_CHAN1) +# warning Assuming PWM channel 1 +# define CONFIG_SAMA5D3X_EK_CHANNEL 1 +# elif defined(CONFIG_SAMA5_PWM_CHAN2) +# warning Assuming PWM channel 2 +# define CONFIG_SAMA5D3X_EK_CHANNEL 2 +# elif defined(CONFIG_SAMA5_PWM_CHAN3) +# warning Assuming PWM channel 3 +# define CONFIG_SAMA5D3X_EK_CHANNEL 3 +# endif +#endif + +#if defined(CONFIG_PWM) && defined(CONFIG_SAMA5_PWM) + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: pwm_devinit + * + * Description: + * All SAMA5 architectures must provide the following interface to work with + * examples/pwm. + * + ************************************************************************************/ + +int pwm_devinit(void) +{ + static bool initialized = false; + struct pwm_lowerhalf_s *pwm; + int ret; + + /* Have we already initialized? */ + + if (!initialized) + { + /* Call sam_pwminitialize() to get an instance of the PWM interface */ + + pwm = sam_pwminitialize(CONFIG_SAMA5D3X_EK_CHANNEL); + if (!pwm) + { + dbg("Failed to get the SAMA5 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; + } + + /* Now we are initialized */ + + initialized = true; + } + + return OK; +} + +#endif /* CONFIG_PWM */ -- cgit v1.2.3