kopia lustrzana https://github.com/micropython/micropython
490 wiersze
17 KiB
C
490 wiersze
17 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014 Damien P. George
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include STM32_HAL_H
|
|
|
|
#include "py/nlr.h"
|
|
#include "py/runtime.h"
|
|
#include "timer.h"
|
|
#include "dac.h"
|
|
#include "dma.h"
|
|
#include "pin.h"
|
|
#include "genhdr/pins.h"
|
|
|
|
/// \moduleref pyb
|
|
/// \class DAC - digital to analog conversion
|
|
///
|
|
/// The DAC is used to output analog values (a specific voltage) on pin X5 or pin X6.
|
|
/// The voltage will be between 0 and 3.3V.
|
|
///
|
|
/// *This module will undergo changes to the API.*
|
|
///
|
|
/// Example usage:
|
|
///
|
|
/// from pyb import DAC
|
|
///
|
|
/// dac = DAC(1) # create DAC 1 on pin X5
|
|
/// dac.write(128) # write a value to the DAC (makes X5 1.65V)
|
|
///
|
|
/// To output a continuous sine-wave:
|
|
///
|
|
/// import math
|
|
/// from pyb import DAC
|
|
///
|
|
/// # create a buffer containing a sine-wave
|
|
/// buf = bytearray(100)
|
|
/// for i in range(len(buf)):
|
|
/// buf[i] = 128 + int(127 * math.sin(2 * math.pi * i / len(buf)))
|
|
///
|
|
/// # output the sine-wave at 400Hz
|
|
/// dac = DAC(1)
|
|
/// dac.write_timed(buf, 400 * len(buf), mode=DAC.CIRCULAR)
|
|
|
|
#if MICROPY_HW_ENABLE_DAC
|
|
|
|
STATIC DAC_HandleTypeDef DAC_Handle;
|
|
|
|
void dac_init(void) {
|
|
memset(&DAC_Handle, 0, sizeof DAC_Handle);
|
|
DAC_Handle.Instance = DAC;
|
|
DAC_Handle.State = HAL_DAC_STATE_RESET;
|
|
HAL_DAC_Init(&DAC_Handle);
|
|
}
|
|
|
|
#if defined(TIM6)
|
|
STATIC void TIM6_Config(uint freq) {
|
|
// Init TIM6 at the required frequency (in Hz)
|
|
TIM_HandleTypeDef *tim = timer_tim6_init(freq);
|
|
|
|
// TIM6 TRGO selection
|
|
TIM_MasterConfigTypeDef config;
|
|
config.MasterOutputTrigger = TIM_TRGO_UPDATE;
|
|
config.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
|
|
HAL_TIMEx_MasterConfigSynchronization(tim, &config);
|
|
|
|
// TIM6 start counter
|
|
HAL_TIM_Base_Start(tim);
|
|
}
|
|
#endif
|
|
|
|
STATIC uint32_t TIMx_Config(mp_obj_t timer) {
|
|
// TRGO selection to trigger DAC
|
|
TIM_HandleTypeDef *tim = pyb_timer_get_handle(timer);
|
|
TIM_MasterConfigTypeDef config;
|
|
config.MasterOutputTrigger = TIM_TRGO_UPDATE;
|
|
config.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
|
|
HAL_TIMEx_MasterConfigSynchronization(tim, &config);
|
|
|
|
// work out the trigger channel (only certain ones are supported)
|
|
if (tim->Instance == TIM2) {
|
|
return DAC_TRIGGER_T2_TRGO;
|
|
} else if (tim->Instance == TIM4) {
|
|
return DAC_TRIGGER_T4_TRGO;
|
|
} else if (tim->Instance == TIM5) {
|
|
return DAC_TRIGGER_T5_TRGO;
|
|
#if defined(TIM6)
|
|
} else if (tim->Instance == TIM6) {
|
|
return DAC_TRIGGER_T6_TRGO;
|
|
#endif
|
|
#if defined(TIM7)
|
|
} else if (tim->Instance == TIM7) {
|
|
return DAC_TRIGGER_T7_TRGO;
|
|
#endif
|
|
#if defined(TIM8)
|
|
} else if (tim->Instance == TIM8) {
|
|
return DAC_TRIGGER_T8_TRGO;
|
|
#endif
|
|
} else {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Timer does not support DAC triggering"));
|
|
}
|
|
}
|
|
|
|
/******************************************************************************/
|
|
// Micro Python bindings
|
|
|
|
typedef enum {
|
|
DAC_STATE_RESET,
|
|
DAC_STATE_WRITE_SINGLE,
|
|
DAC_STATE_BUILTIN_WAVEFORM,
|
|
DAC_STATE_DMA_WAVEFORM, // should be last enum since we use space beyond it
|
|
} pyb_dac_state_t;
|
|
|
|
typedef struct _pyb_dac_obj_t {
|
|
mp_obj_base_t base;
|
|
uint32_t dac_channel; // DAC_CHANNEL_1 or DAC_CHANNEL_2
|
|
DMA_Stream_TypeDef *dma_stream; // DMA1_Stream5 or DMA1_Stream6
|
|
uint16_t pin; // GPIO_PIN_4 or GPIO_PIN_5
|
|
uint8_t bits; // 8 or 12
|
|
uint8_t state;
|
|
} pyb_dac_obj_t;
|
|
|
|
STATIC mp_obj_t pyb_dac_init_helper(pyb_dac_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_bits, MP_ARG_INT, {.u_int = 8} },
|
|
};
|
|
|
|
// parse args
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
// GPIO configuration
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|
GPIO_InitStructure.Pin = self->pin;
|
|
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
|
|
GPIO_InitStructure.Pull = GPIO_NOPULL;
|
|
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
|
|
|
|
// DAC peripheral clock
|
|
__DAC_CLK_ENABLE();
|
|
|
|
// stop anything already going on
|
|
HAL_DAC_Stop(&DAC_Handle, self->dac_channel);
|
|
if ((self->dac_channel == DAC_CHANNEL_1 && DAC_Handle.DMA_Handle1 != NULL)
|
|
|| (self->dac_channel == DAC_CHANNEL_2 && DAC_Handle.DMA_Handle2 != NULL)) {
|
|
HAL_DAC_Stop_DMA(&DAC_Handle, self->dac_channel);
|
|
}
|
|
|
|
// set bit resolution
|
|
if (args[0].u_int == 8 || args[0].u_int == 12) {
|
|
self->bits = args[0].u_int;
|
|
} else {
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "unsupported bits"));
|
|
}
|
|
|
|
// reset state of DAC
|
|
self->state = DAC_STATE_RESET;
|
|
|
|
return mp_const_none;
|
|
}
|
|
|
|
// create the dac object
|
|
// currently support either DAC1 on X5 (id = 1) or DAC2 on X6 (id = 2)
|
|
|
|
/// \classmethod \constructor(port)
|
|
/// Construct a new DAC object.
|
|
///
|
|
/// `port` can be a pin object, or an integer (1 or 2).
|
|
/// DAC(1) is on pin X5 and DAC(2) is on pin X6.
|
|
STATIC mp_obj_t pyb_dac_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
|
|
// check arguments
|
|
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
|
|
|
|
// get pin/channel to output on
|
|
mp_int_t dac_id;
|
|
if (MP_OBJ_IS_INT(args[0])) {
|
|
dac_id = mp_obj_get_int(args[0]);
|
|
} else {
|
|
const pin_obj_t *pin = pin_find(args[0]);
|
|
if (pin == &pin_A4) {
|
|
dac_id = 1;
|
|
} else if (pin == &pin_A5) {
|
|
dac_id = 2;
|
|
} else {
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin %q does not have DAC capabilities", pin->name));
|
|
}
|
|
}
|
|
|
|
pyb_dac_obj_t *dac = m_new_obj(pyb_dac_obj_t);
|
|
dac->base.type = &pyb_dac_type;
|
|
|
|
if (dac_id == 1) {
|
|
dac->pin = GPIO_PIN_4;
|
|
dac->dac_channel = DAC_CHANNEL_1;
|
|
dac->dma_stream = DMA_STREAM_DAC1;
|
|
} else if (dac_id == 2) {
|
|
dac->pin = GPIO_PIN_5;
|
|
dac->dac_channel = DAC_CHANNEL_2;
|
|
dac->dma_stream = DMA_STREAM_DAC2;
|
|
} else {
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "DAC %d does not exist", dac_id));
|
|
}
|
|
|
|
// configure the peripheral
|
|
mp_map_t kw_args;
|
|
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
|
|
pyb_dac_init_helper(dac, n_args - 1, args + 1, &kw_args);
|
|
|
|
// return object
|
|
return dac;
|
|
}
|
|
|
|
STATIC mp_obj_t pyb_dac_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
|
|
return pyb_dac_init_helper(args[0], n_args - 1, args + 1, kw_args);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_dac_init_obj, 1, pyb_dac_init);
|
|
|
|
#if defined(TIM6)
|
|
/// \method noise(freq)
|
|
/// Generate a pseudo-random noise signal. A new random sample is written
|
|
/// to the DAC output at the given frequency.
|
|
STATIC mp_obj_t pyb_dac_noise(mp_obj_t self_in, mp_obj_t freq) {
|
|
pyb_dac_obj_t *self = self_in;
|
|
|
|
// set TIM6 to trigger the DAC at the given frequency
|
|
TIM6_Config(mp_obj_get_int(freq));
|
|
|
|
if (self->state != DAC_STATE_BUILTIN_WAVEFORM) {
|
|
// configure DAC to trigger via TIM6
|
|
DAC_ChannelConfTypeDef config;
|
|
config.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
|
|
config.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
|
|
HAL_DAC_ConfigChannel(&DAC_Handle, &config, self->dac_channel);
|
|
self->state = DAC_STATE_BUILTIN_WAVEFORM;
|
|
}
|
|
|
|
// set noise wave generation
|
|
HAL_DACEx_NoiseWaveGenerate(&DAC_Handle, self->dac_channel, DAC_LFSRUNMASK_BITS10_0);
|
|
HAL_DAC_SetValue(&DAC_Handle, self->dac_channel, DAC_ALIGN_12B_L, 0x7ff0);
|
|
HAL_DAC_Start(&DAC_Handle, self->dac_channel);
|
|
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_dac_noise_obj, pyb_dac_noise);
|
|
#endif
|
|
|
|
#if defined(TIM6)
|
|
/// \method triangle(freq)
|
|
/// Generate a triangle wave. The value on the DAC output changes at
|
|
/// the given frequency, and the frequence of the repeating triangle wave
|
|
/// itself is 256 (or 1024, need to check) times smaller.
|
|
STATIC mp_obj_t pyb_dac_triangle(mp_obj_t self_in, mp_obj_t freq) {
|
|
pyb_dac_obj_t *self = self_in;
|
|
|
|
// set TIM6 to trigger the DAC at the given frequency
|
|
TIM6_Config(mp_obj_get_int(freq));
|
|
|
|
if (self->state != DAC_STATE_BUILTIN_WAVEFORM) {
|
|
// configure DAC to trigger via TIM6
|
|
DAC_ChannelConfTypeDef config;
|
|
config.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
|
|
config.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
|
|
HAL_DAC_ConfigChannel(&DAC_Handle, &config, self->dac_channel);
|
|
self->state = DAC_STATE_BUILTIN_WAVEFORM;
|
|
}
|
|
|
|
// set triangle wave generation
|
|
HAL_DACEx_TriangleWaveGenerate(&DAC_Handle, self->dac_channel, DAC_TRIANGLEAMPLITUDE_1023);
|
|
HAL_DAC_SetValue(&DAC_Handle, self->dac_channel, DAC_ALIGN_12B_R, 0x100);
|
|
HAL_DAC_Start(&DAC_Handle, self->dac_channel);
|
|
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_dac_triangle_obj, pyb_dac_triangle);
|
|
#endif
|
|
|
|
/// \method write(value)
|
|
/// Direct access to the DAC output (8 bit only at the moment).
|
|
STATIC mp_obj_t pyb_dac_write(mp_obj_t self_in, mp_obj_t val) {
|
|
pyb_dac_obj_t *self = self_in;
|
|
|
|
if (self->state != DAC_STATE_WRITE_SINGLE) {
|
|
DAC_ChannelConfTypeDef config;
|
|
config.DAC_Trigger = DAC_TRIGGER_NONE;
|
|
config.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
|
|
HAL_DAC_ConfigChannel(&DAC_Handle, &config, self->dac_channel);
|
|
self->state = DAC_STATE_WRITE_SINGLE;
|
|
}
|
|
|
|
// DAC output is always 12-bit at the hardware level, and we provide support
|
|
// for multiple bit "resolutions" simply by shifting the input value.
|
|
HAL_DAC_SetValue(&DAC_Handle, self->dac_channel, DAC_ALIGN_12B_R,
|
|
mp_obj_get_int(val) << (12 - self->bits));
|
|
|
|
HAL_DAC_Start(&DAC_Handle, self->dac_channel);
|
|
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_dac_write_obj, pyb_dac_write);
|
|
|
|
#if defined(TIM6)
|
|
/// \method write_timed(data, freq, *, mode=DAC.NORMAL)
|
|
/// Initiates a burst of RAM to DAC using a DMA transfer.
|
|
/// The input data is treated as an array of bytes (8 bit data).
|
|
///
|
|
/// `freq` can be an integer specifying the frequency to write the DAC
|
|
/// samples at, using Timer(6). Or it can be an already-initialised
|
|
/// Timer object which is used to trigger the DAC sample. Valid timers
|
|
/// are 2, 4, 5, 6, 7 and 8.
|
|
///
|
|
/// `mode` can be `DAC.NORMAL` or `DAC.CIRCULAR`.
|
|
///
|
|
// TODO add callback argument, to call when transfer is finished
|
|
// TODO add double buffer argument
|
|
//
|
|
// TODO reconsider API, eg: write_trig(data, *, trig=None, loop=False)
|
|
// Then trigger can be timer (preinitialised with desired freq) or pin (extint9),
|
|
// and we can reuse the same timer for both DACs (and maybe also ADC) without
|
|
// setting the freq twice.
|
|
// Can still do 1-liner: dac.write_trig(buf, trig=Timer(6, freq=100), loop=True)
|
|
mp_obj_t pyb_dac_write_timed(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
{ MP_QSTR_freq, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
{ MP_QSTR_mode, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DMA_NORMAL} },
|
|
};
|
|
|
|
// parse args
|
|
pyb_dac_obj_t *self = pos_args[0];
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
// get the data to write
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(args[0].u_obj, &bufinfo, MP_BUFFER_READ);
|
|
|
|
uint32_t dac_trigger;
|
|
if (mp_obj_is_integer(args[1].u_obj)) {
|
|
// set TIM6 to trigger the DAC at the given frequency
|
|
TIM6_Config(mp_obj_get_int(args[1].u_obj));
|
|
dac_trigger = DAC_TRIGGER_T6_TRGO;
|
|
} else {
|
|
// set the supplied timer to trigger the DAC (timer should be initialised)
|
|
dac_trigger = TIMx_Config(args[1].u_obj);
|
|
}
|
|
|
|
__DMA1_CLK_ENABLE();
|
|
|
|
/*
|
|
DMA_Cmd(self->dma_stream, DISABLE);
|
|
while (DMA_GetCmdStatus(self->dma_stream) != DISABLE) {
|
|
}
|
|
|
|
DAC_Cmd(self->dac_channel, DISABLE);
|
|
*/
|
|
|
|
/*
|
|
// DAC channel configuration
|
|
DAC_InitTypeDef DAC_InitStructure;
|
|
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T7_TRGO;
|
|
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
|
|
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1; // unused, but need to set it to a valid value
|
|
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
|
|
DAC_Init(self->dac_channel, &DAC_InitStructure);
|
|
*/
|
|
|
|
// DMA1_Stream[67] channel7 configuration
|
|
DMA_HandleTypeDef DMA_Handle;
|
|
DMA_Handle.Instance = self->dma_stream;
|
|
|
|
// Need to deinit DMA first
|
|
DMA_Handle.State = HAL_DMA_STATE_READY;
|
|
HAL_DMA_DeInit(&DMA_Handle);
|
|
|
|
DMA_Handle.Init.Channel = DMA_CHANNEL_DAC1; // DAC1 & DAC2 both use the same channel
|
|
DMA_Handle.Init.Direction = DMA_MEMORY_TO_PERIPH;
|
|
DMA_Handle.Init.PeriphInc = DMA_PINC_DISABLE;
|
|
DMA_Handle.Init.MemInc = DMA_MINC_ENABLE;
|
|
if (self->bits == 8) {
|
|
DMA_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
|
|
DMA_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
|
|
} else {
|
|
DMA_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
|
|
DMA_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
|
|
}
|
|
DMA_Handle.Init.Mode = args[2].u_int;
|
|
DMA_Handle.Init.Priority = DMA_PRIORITY_HIGH;
|
|
DMA_Handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
|
|
DMA_Handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
|
|
DMA_Handle.Init.MemBurst = DMA_MBURST_SINGLE;
|
|
DMA_Handle.Init.PeriphBurst = DMA_PBURST_SINGLE;
|
|
HAL_DMA_Init(&DMA_Handle);
|
|
|
|
if (self->dac_channel == DAC_CHANNEL_1) {
|
|
__HAL_LINKDMA(&DAC_Handle, DMA_Handle1, DMA_Handle);
|
|
} else {
|
|
__HAL_LINKDMA(&DAC_Handle, DMA_Handle2, DMA_Handle);
|
|
}
|
|
|
|
DAC_Handle.Instance = DAC;
|
|
DAC_Handle.State = HAL_DAC_STATE_RESET;
|
|
HAL_DAC_Init(&DAC_Handle);
|
|
|
|
if (self->state != DAC_STATE_DMA_WAVEFORM + dac_trigger) {
|
|
DAC_ChannelConfTypeDef config;
|
|
config.DAC_Trigger = dac_trigger;
|
|
config.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
|
|
HAL_DAC_ConfigChannel(&DAC_Handle, &config, self->dac_channel);
|
|
self->state = DAC_STATE_DMA_WAVEFORM + dac_trigger;
|
|
}
|
|
|
|
if (self->bits == 8) {
|
|
HAL_DAC_Start_DMA(&DAC_Handle, self->dac_channel,
|
|
(uint32_t*)bufinfo.buf, bufinfo.len, DAC_ALIGN_8B_R);
|
|
} else {
|
|
HAL_DAC_Start_DMA(&DAC_Handle, self->dac_channel,
|
|
(uint32_t*)bufinfo.buf, bufinfo.len / 2, DAC_ALIGN_12B_R);
|
|
}
|
|
|
|
/*
|
|
// enable DMA stream
|
|
DMA_Cmd(self->dma_stream, ENABLE);
|
|
while (DMA_GetCmdStatus(self->dma_stream) == DISABLE) {
|
|
}
|
|
|
|
// enable DAC channel
|
|
DAC_Cmd(self->dac_channel, ENABLE);
|
|
|
|
// enable DMA for DAC channel
|
|
DAC_DMACmd(self->dac_channel, ENABLE);
|
|
*/
|
|
|
|
//printf("DMA: %p %lu\n", bufinfo.buf, bufinfo.len);
|
|
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_dac_write_timed_obj, 1, pyb_dac_write_timed);
|
|
#endif
|
|
|
|
STATIC const mp_map_elem_t pyb_dac_locals_dict_table[] = {
|
|
// instance methods
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pyb_dac_init_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&pyb_dac_write_obj },
|
|
#if defined(TIM6)
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_noise), (mp_obj_t)&pyb_dac_noise_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_triangle), (mp_obj_t)&pyb_dac_triangle_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_write_timed), (mp_obj_t)&pyb_dac_write_timed_obj },
|
|
#endif
|
|
|
|
// class constants
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_NORMAL), MP_OBJ_NEW_SMALL_INT(DMA_NORMAL) },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_CIRCULAR), MP_OBJ_NEW_SMALL_INT(DMA_CIRCULAR) },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(pyb_dac_locals_dict, pyb_dac_locals_dict_table);
|
|
|
|
const mp_obj_type_t pyb_dac_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_DAC,
|
|
.make_new = pyb_dac_make_new,
|
|
.locals_dict = (mp_obj_t)&pyb_dac_locals_dict,
|
|
};
|
|
|
|
#endif // MICROPY_HW_ENABLE_DAC
|