From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.
Dependents: motor_driver motor_driver_screaming_fix
Diff: targets/TARGET_STM/analogout_api.c
- Revision:
- 0:083111ae2a11
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_STM/analogout_api.c Thu Nov 26 04:08:56 2020 +0000 @@ -0,0 +1,80 @@ +/* mbed Microcontroller Library + * Copyright (c) 2017, STMicroelectronics + * All rights reserved. + * + * 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 of STMicroelectronics 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 HOLDER 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. + */ +#include "mbed_assert.h" +#include "analogout_api.h" + +#if DEVICE_ANALOGOUT + +#include "cmsis.h" +#include "pinmap.h" +#include "mbed_error.h" +#include "PeripheralPins.h" + +#define DAC_RANGE (0xFFF) // 12 bits +#define DAC_NB_BITS (12) + +static inline void dac_write(dac_t *obj, int value) +{ + HAL_DAC_SetValue(&obj->handle, obj->channel, DAC_ALIGN_12B_R, (value & DAC_RANGE)); + HAL_DAC_Start(&obj->handle, obj->channel); +} + +static inline int dac_read(dac_t *obj) +{ + return (int)HAL_DAC_GetValue(&obj->handle, obj->channel); +} + +void analogout_write(dac_t *obj, float value) +{ + if (value < 0.0f) { + dac_write(obj, 0); // Min value + } else if (value > 1.0f) { + dac_write(obj, (int)DAC_RANGE); // Max value + } else { + dac_write(obj, (int)(value * (float)DAC_RANGE)); + } +} + +void analogout_write_u16(dac_t *obj, uint16_t value) +{ + dac_write(obj, value >> (16 - DAC_NB_BITS)); +} + +float analogout_read(dac_t *obj) +{ + uint32_t value = dac_read(obj); + return (float)value * (1.0f / (float)DAC_RANGE); +} + +uint16_t analogout_read_u16(dac_t *obj) +{ + uint32_t value = dac_read(obj); + return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits +} + +#endif // DEVICE_ANALOGOUT