2020-03-27 21:36:04 +00:00
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#pragma once
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2020-04-13 13:39:01 +00:00
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#include "peripherals.h"
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#include "stm32f030x8.h"
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2020-03-27 21:36:04 +00:00
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#include "stmlib/stmlib.h"
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2020-04-10 18:21:18 +00:00
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#include <stm32f0xx_hal.h>
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2020-04-01 10:04:42 +00:00
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namespace stereo_mix {
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2020-03-27 21:36:04 +00:00
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class Dac { // MCP4xx2 dac implementation
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public:
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2020-04-13 13:39:01 +00:00
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Dac(GPIO_TypeDef* ssGpioPort_, uint16_t ssGpioPin_)
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: ssGpioPort(ssGpioPort_)
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, ssGpioPin(ssGpioPin_)
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2020-03-27 21:36:04 +00:00
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{
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2020-04-26 14:48:47 +00:00
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__HAL_RCC_GPIOA_CLK_ENABLE();
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2020-04-25 16:30:09 +00:00
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__HAL_RCC_GPIOB_CLK_ENABLE();
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__HAL_RCC_SPI1_CLK_ENABLE();
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2020-03-27 21:36:04 +00:00
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ssGpioPort = ssGpioPort_;
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ssGpioPin = ssGpioPin_;
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// init SS/CS/RST GPIO
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GPIO_InitTypeDef gpio_init;
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2020-04-10 18:21:18 +00:00
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gpio_init.Mode = GPIO_MODE_OUTPUT_PP;
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gpio_init.Speed = GPIO_SPEED_FREQ_HIGH;
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gpio_init.Pull = GPIO_NOPULL;
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gpio_init.Pin = ssGpioPin;
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HAL_GPIO_Init(ssGpioPort, &gpio_init);
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2020-03-27 21:36:04 +00:00
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2020-04-10 18:21:18 +00:00
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HAL_GPIO_WritePin(ssGpioPort, ssGpioPin, GPIO_PIN_SET);
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2020-03-27 21:36:04 +00:00
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// init AF GPIO
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2020-04-10 18:21:18 +00:00
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gpio_init.Mode = GPIO_MODE_AF_PP;
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gpio_init.Speed = GPIO_SPEED_FREQ_HIGH;
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gpio_init.Pull = GPIO_NOPULL;
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gpio_init.Pin = GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5;
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gpio_init.Alternate = GPIO_AF0_SPI1;
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HAL_GPIO_Init(GPIOB, &gpio_init);
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2020-03-27 21:36:04 +00:00
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// init SPI
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2020-04-13 13:39:01 +00:00
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hspi1.Init.Direction = SPI_DIRECTION_2LINES;
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hspi1.Init.Mode = SPI_MODE_MASTER;
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hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
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hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
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hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
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hspi1.Init.NSS = SPI_NSS_SOFT;
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hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
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hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
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hspi1.Init.CRCPolynomial = 7;
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HAL_SPI_Init(&hspi1);
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2020-03-27 21:36:04 +00:00
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};
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void Write16(uint8_t channel, uint16_t value, uint8_t gain, uint8_t buffered)
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{
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if (channel > 1)
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return; // only 2 channels available
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if (buffered > 1)
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return; // buffered can only be 0 or 1
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if (gain > 2 || gain < 1)
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return; // gain has to be 1 or 2
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gain = !(gain - 1);
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value >>= 4; // the dac supports a maximum of 12 bits precision
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value |= channel << 15; // select channel
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value |= buffered << 14; // set buffered
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value |= gain << 13; // set gain
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value |= 1 << 12; // shutdown always set to 1
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2020-04-10 18:21:18 +00:00
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HAL_GPIO_WritePin(ssGpioPort, ssGpioPin, GPIO_PIN_RESET);
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2020-04-23 18:29:30 +00:00
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HAL_SPI_Transmit(&hspi1, (uint8_t*)&value, 1, HAL_MAX_DELAY);
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2020-03-27 21:36:04 +00:00
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//SPI_I2S_SendData16(SPI1, value); // MSB first, specified in config
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2020-04-23 18:29:30 +00:00
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/*while (HAL_SPI_GetState(&hspi1) & HAL_SPI_STATE_BUSY) {
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2020-03-27 21:36:04 +00:00
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asm("nop");
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2020-04-23 18:29:30 +00:00
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}*/
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2020-04-10 18:21:18 +00:00
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HAL_GPIO_WritePin(ssGpioPort, ssGpioPin, GPIO_PIN_SET);
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2020-03-27 21:36:04 +00:00
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};
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void Write16(uint8_t channel, uint16_t value)
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{
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Write16(channel, value, 1, 0);
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};
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private:
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GPIO_TypeDef* ssGpioPort;
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uint16_t ssGpioPin;
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};
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2020-04-01 10:04:42 +00:00
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}
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