mirror of
https://github.com/jhbruhn/eurorack.git
synced 2025-03-14 18:55:48 +00:00
109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
#pragma once
|
|
|
|
#include "peripherals.h"
|
|
#include "stmlib/stmlib.h"
|
|
#include <stm32f0xx_hal.h>
|
|
#include <stm32f0xx_ll_spi.h>
|
|
|
|
namespace stereo_mix {
|
|
|
|
GPIO_TypeDef* kOffsetDacPorts[] = { GPIOB, GPIOB, GPIOB, GPIOB };
|
|
const uint16_t kOffsetDacPins[] = { GPIO_PIN_8, GPIO_PIN_9, GPIO_PIN_10, GPIO_PIN_11 };
|
|
|
|
GPIO_TypeDef* kMDacPorts[] = { GPIOA, GPIOB, GPIOB, GPIOC };
|
|
const uint16_t kMDacPins[] = { GPIO_PIN_15, GPIO_PIN_7, GPIO_PIN_15, GPIO_PIN_13 };
|
|
|
|
class Dacs { // MCP4xx2 dac implementation
|
|
public:
|
|
Dacs()
|
|
{
|
|
__HAL_RCC_GPIOA_CLK_ENABLE();
|
|
__HAL_RCC_GPIOB_CLK_ENABLE();
|
|
__HAL_RCC_GPIOC_CLK_ENABLE();
|
|
__HAL_RCC_SPI1_CLK_ENABLE();
|
|
|
|
HAL_NVIC_SetPriority(SPI1_IRQn, 0, 0);
|
|
HAL_NVIC_EnableIRQ(SPI1_IRQn);
|
|
|
|
GPIO_InitTypeDef gpio_init;
|
|
|
|
for (size_t i = 0; i < 8; i++) {
|
|
// init SS/CS/RST GPIO
|
|
uint16_t ssGpioPin;
|
|
GPIO_TypeDef* ssGpioPort;
|
|
if (i < 4) {
|
|
ssGpioPin = kMDacPins[i];
|
|
ssGpioPort = kMDacPorts[i];
|
|
} else {
|
|
ssGpioPin = kOffsetDacPins[i - 4];
|
|
ssGpioPort = kOffsetDacPorts[i - 4];
|
|
}
|
|
gpio_init.Mode = GPIO_MODE_OUTPUT_PP;
|
|
gpio_init.Speed = GPIO_SPEED_FREQ_HIGH;
|
|
gpio_init.Pull = GPIO_NOPULL;
|
|
gpio_init.Pin = ssGpioPin;
|
|
HAL_GPIO_Init(ssGpioPort, &gpio_init);
|
|
|
|
HAL_GPIO_WritePin(ssGpioPort, ssGpioPin, GPIO_PIN_SET);
|
|
}
|
|
|
|
// init AF GPIO
|
|
|
|
gpio_init.Mode = GPIO_MODE_AF_PP;
|
|
gpio_init.Speed = GPIO_SPEED_FREQ_HIGH;
|
|
gpio_init.Pull = GPIO_NOPULL;
|
|
gpio_init.Pin = GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5;
|
|
gpio_init.Alternate = GPIO_AF0_SPI1;
|
|
HAL_GPIO_Init(GPIOB, &gpio_init);
|
|
|
|
// init SPI
|
|
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
|
|
hspi1.Init.Mode = SPI_MODE_MASTER;
|
|
hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
|
|
hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
|
|
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
|
|
hspi1.Init.NSS = SPI_NSS_SOFT;
|
|
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
|
|
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
|
|
hspi1.Init.CRCPolynomial = 7;
|
|
HAL_SPI_Init(&hspi1);
|
|
SPI1->CR1 |= SPI_CR1_SPE; // this is required only once
|
|
};
|
|
|
|
void Write16(uint8_t device, uint8_t channel, uint16_t value, uint8_t gain, uint8_t buffered)
|
|
{
|
|
if (channel > 1)
|
|
return; // only 2 channels available
|
|
if (buffered > 1)
|
|
return; // buffered can only be 0 or 1
|
|
if (gain > 2 || gain < 1)
|
|
return; // gain has to be 1 or 2
|
|
|
|
gain = !(gain - 1);
|
|
|
|
value >>= 4; // the dac supports a maximum of 12 bits precision
|
|
|
|
value |= channel << 15; // select channel
|
|
value |= buffered << 14; // set buffered
|
|
value |= gain << 13; // set gain
|
|
value |= 1 << 12; // shutdown always set to 1
|
|
|
|
kMDacPorts[device]->BRR |= kMDacPins[device];
|
|
SPI1->DR = value;
|
|
while ((SPI1->SR & (SPI_SR_TXE | SPI_SR_BSY)) != SPI_SR_TXE)
|
|
;
|
|
kMDacPorts[device]->BSRR |= kMDacPins[device];
|
|
kOffsetDacPorts[device]->BRR |= kOffsetDacPins[device];
|
|
SPI1->DR = value;
|
|
while ((SPI1->SR & (SPI_SR_TXE | SPI_SR_BSY)) != SPI_SR_TXE)
|
|
;
|
|
kOffsetDacPorts[device]->BSRR |= kOffsetDacPins[device];
|
|
};
|
|
|
|
void Write16(uint8_t device, uint8_t channel, uint16_t value)
|
|
{
|
|
Write16(device, channel, value, 1, 0);
|
|
};
|
|
};
|
|
|
|
}
|