diff options
Diffstat (limited to 'nuttx/configs/lpcxpresso-lpc1768/src/up_dac.c')
-rw-r--r-- | nuttx/configs/lpcxpresso-lpc1768/src/up_dac.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/nuttx/configs/lpcxpresso-lpc1768/src/up_dac.c b/nuttx/configs/lpcxpresso-lpc1768/src/up_dac.c new file mode 100644 index 000000000..9b54bea18 --- /dev/null +++ b/nuttx/configs/lpcxpresso-lpc1768/src/up_dac.c @@ -0,0 +1,100 @@ +/************************************************************************************ + * configs/zkit-arm-1769/src/up_dac.c + * arch/arm/src/board/up_dac.c + * + * Copyright (C) 2013 Zilogic Systems. All rights reserved. + * Author: Kannan <code@nuttx.org> + * + * Based on configs/stm3220g-eval/src/up_dac.c + * + * Copyright (C) 2012, 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 <errno.h> +#include <debug.h> + +#include <nuttx/analog/dac.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "up_internal.h" + +#include "lpc17_dac.h" + +#ifdef CONFIG_DAC + +/************************************************************************************ + * Name: dac_devinit + * + * Description: + * All LPC17xx architectures must provide the following interface to work with + * examples/diag. + * + ************************************************************************************/ + +int dac_devinit(void) +{ + static bool initialized = false; + struct dac_dev_s *dac; + int ret; + + if (!initialized) + { + /* Call lpc17_dacinitialize() to get an instance of the dac interface */ + + dac = lpc17_dacinitialize(); + if (dac == NULL) + { + adbg("ERROR: Failed to get dac interface\n"); + return -ENODEV; + } + + ret = dac_register("/dev/dac0", dac); + if (ret < 0) + { + adbg("dac_register failed: %d\n", ret); + return ret; + } + + initialized = true; + } + + return OK; +} + +#endif /* CONFIG_DAC */ |