mirror of
https://github.com/jhbruhn/eurorack.git
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65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
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#include "ad57x4.h"
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#include "peripherals.h"
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#include "spi_mode.h"
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#include "stm32f3xx_hal_gpio.h"
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#include <stm32f3xx_hal.h>
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static const uint32_t kPinEnable = GPIO_PIN_5;
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void AD57X4::Init()
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{
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GPIO_InitTypeDef init;
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init.Pin = kPinEnable;
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init.Mode = GPIO_MODE_OUTPUT_PP;
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init.Pull = GPIO_NOPULL;
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init.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(GPIOB, &init);
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HAL_GPIO_WritePin(GPIOB, kPinEnable, GPIO_PIN_SET);
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}
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void AD57X4::EnableAndSetRange(uint8_t dac, VoltageRange range, bool bipolar)
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{
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if (!(this->dacPower & (1 << dac))) {
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// power on dac
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this->dacPower |= 1 << dac;
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this->Write(REGISTER_POWER_CONTROL, 0, this->dacPower);
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}
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if (this->dacRange[dac] != range) {
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this->Write(REGISTER_OUTPUT_RANGE, dac, range + (bipolar ? 3 : 0));
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this->dacRange[dac] = range;
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}
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}
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void AD57X4::WriteDacUnipolar(uint8_t dac, VoltageRange range, uint16_t value)
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{
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EnableAndSetRange(dac, range, false);
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this->Write(REGISTER_DAC, dac, value);
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}
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void AD57X4::WriteDacBipolar(uint8_t dac, VoltageRange range, int16_t value)
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{
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uint16_t twosComplement = value;
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if (value < 0) {
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twosComplement = ~(-value) + 1;
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}
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EnableAndSetRange(dac, range, true);
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this->Write(REGISTER_DAC, dac, twosComplement);
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}
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void AD57X4::Write(Register reg, uint8_t address, uint16_t data)
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{
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uint8_t first = address; // select address
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first |= reg << 3; // select register
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first |= 0 << 7; // write command
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first |= 0 << 6; // always 0
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InitSPI(SPI_MODE_DAC1);
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HAL_GPIO_WritePin(GPIOB, kPinEnable, GPIO_PIN_RESET);
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HAL_SPI_Transmit(&hspi2, &first, 1, HAL_MAX_DELAY); // write data
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HAL_SPI_Transmit(&hspi2, reinterpret_cast<uint8_t*>(&data), 2, HAL_MAX_DELAY);
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HAL_GPIO_WritePin(GPIOB, kPinEnable, GPIO_PIN_SET);
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}
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