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/**
* @file dac.cpp
* @brief Manages signal creation using the DAC.
*
* Copyright (C) 2020 Clyne Sullivan
*
* Distributed under the GNU GPL v3 or later. You should have received a copy of
* the GNU General Public License along with this program.
* If not, see <https://www.gnu.org/licenses/>.
*/
#include "dac.hpp"
constexpr static const auto dacd = &DACD1;
constexpr static const auto gptd = &GPTD6;
constexpr static const DACConfig dac_config = {
.init = 0,
.datamode = DAC_DHRM_12BIT_RIGHT,
.cr = 0
};
constexpr static const DACConversionGroup dac_group_config = {
.num_channels = 1,
.end_cb = nullptr,
.error_cb = nullptr,
.trigger = DAC_TRG(0)
};
constexpr static const GPTConfig gpt_config = {
.frequency = 4000000,
.callback = nullptr,
.cr2 = TIM_CR2_MMS_1, /* TRGO */
.dier = 0
};
namespace dac
{
void init()
{
palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_ANALOG);
//palSetPadMode(GPIOA, 5, PAL_MODE_INPUT_ANALOG);
dacStart(dacd, &dac_config);
gptStart(gptd, &gpt_config);
}
void write_start(dacsample_t *buffer, size_t count)
{
dacStartConversion(dacd, &dac_group_config, buffer, count);
gptStartContinuous(gptd, 2);
}
void write_stop()
{
gptStopTimer(gptd);
dacStopConversion(dacd);
}
}
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