Working DAC lib
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DAC7578.c
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168
DAC7578.c
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/**
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* @file DAC7578.c
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* @brief
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* @author sanderspeetjens
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*/
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#include "DAC7578.h"
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#define DAC7578_TIMEOUT 100
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void DAC7578_Init(DAC7578_HandleTypeDef *hdac, I2C_HandleTypeDef *hi2c, uint8_t address, GPIO_TypeDef *ldac_port, uint16_t ldac_pin) {
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hdac->hi2c = hi2c;
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address &= 0b1110;
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hdac->address = (0b1001 << 4) | address;
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hdac->ldac_port = ldac_port;
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hdac->ldac_pin = ldac_pin;
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}
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/**
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* @brief Set the byte in the designated register to value.
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* @param regAddr Register address to write.
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* @param val Value to set, 0 to 255.
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*/
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void DAC7578_SetRegByte(DAC7578_HandleTypeDef *hdac, uint8_t regAddr, uint16_t val) {
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uint8_t bytes[3] = { regAddr, val >> 8, val & 0xff };
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HAL_I2C_Master_Transmit(hdac->hi2c, hdac->address, bytes, 3, DAC7578_TIMEOUT);
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}
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/**
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* @brief Gets the byte in the designated register.
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* @param regAddr Register address to read.
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* @return Value stored in the register, 0 to 255.
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*/
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uint16_t DAC7578_GetRegByte(DAC7578_HandleTypeDef *hdac, uint8_t regAddr) {
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uint8_t val[2];
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HAL_I2C_Master_Transmit(hdac->hi2c, hdac->address, ®Addr, 1, DAC7578_TIMEOUT);
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HAL_I2C_Master_Receive(hdac->hi2c, hdac->address, val, 2, DAC7578_TIMEOUT);
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return val[1] + (val[0] << 8);
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}
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/**
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* @brief This function sets the output of a DAC
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* @param hdac The DAC handle
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* @param chan The DAC number (0-7)
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* @param value The 10-bit value to set the DAC to
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* @return HAL_StatusTypeDef HAL_OK if successful, HAL_ERROR or HAL_BUSY otherwise
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*/
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void DAC7578_set_dac_output(DAC7578_HandleTypeDef *hdac, uint8_t chan, uint16_t value, bool update) {
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uint8_t regAddr = 0x00;
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// limit value to 10 bits
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value &= 0xFFF;
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value = (value << 4);
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// set input register of dac n_dac to value
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// register is 0x00 + n_dac
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regAddr = 0b0111 & chan;
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if (update) {
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regAddr |= 0x30;
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}
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DAC7578_SetRegByte(hdac, regAddr, value);
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}
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void DAC7578_update_dac_output(DAC7578_HandleTypeDef *hdac, uint8_t chan) {
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uint8_t regAddr = 0x00;
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// update dac chan
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// register is 0x00 + n_dac
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regAddr = 0b1111 & chan;
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regAddr |= 0x10;
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HAL_GPIO_WritePin(hdac->ldac_port, hdac->ldac_pin, GPIO_PIN_RESET);
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DAC7578_SetRegByte(hdac, regAddr, 0xFFFF);
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HAL_GPIO_WritePin(hdac->ldac_port, hdac->ldac_pin, GPIO_PIN_SET);
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}
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void DAC7578_set_dac_output_all(DAC7578_HandleTypeDef *hdac, uint16_t value, bool update) {
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// set input register of all dacs to value
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// register is 0x00 and broadcast address is 0x0F
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uint8_t regAddr = 0x0F;
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// limit value to 12 bits
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value &= 0xFFF;
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value = (value << 4);
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if (update) {
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regAddr |= 0x30;
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}
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DAC7578_SetRegByte(hdac, regAddr, value);
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}
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void DAC7578_update_dac_output_all(DAC7578_HandleTypeDef *hdac) {
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uint8_t regAddr = 0x00;
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// update all dacs
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// register is 0x00 and broadcast address is 0x0F
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regAddr = 0x0F;
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regAddr |= 0x10;
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HAL_GPIO_WritePin(hdac->ldac_port, hdac->ldac_pin, GPIO_PIN_RESET);
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DAC7578_SetRegByte(hdac, regAddr, 0);
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HAL_GPIO_WritePin(hdac->ldac_port, hdac->ldac_pin, GPIO_PIN_SET);
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}
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void DAC7578_read_dac_output(DAC7578_HandleTypeDef *hdac, uint8_t chan, uint16_t *value) {
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uint8_t regAddr = 0x00;
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uint16_t ret;
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// read input register of dac chan
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// register is 0x10 + chan
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regAddr = 0b1111 & chan;
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regAddr |= 0x10;
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ret = DAC7578_GetRegByte(hdac, regAddr);
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ret >>= 4;
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if (value != NULL)
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*value = ret;
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}
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void DAC7578_read_dac_input(DAC7578_HandleTypeDef *hdac, uint8_t chan, uint16_t *value) {
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uint8_t regAddr = 0x00;
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uint16_t ret;
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// read input register of dac chan
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// register is 0x10 + chan
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regAddr = 0b1111 & chan;
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ret = DAC7578_GetRegByte(hdac, regAddr);
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ret >>= 4;
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if (value != NULL)
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*value = ret;
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}
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void DAC7578_write_dac_power(DAC7578_HandleTypeDef* hdac, uint8_t chan, DAC7578_power_t power) {
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uint8_t regAddr = 0x40;
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uint16_t pd_config = ((uint16_t) power) << 13; // PD1, PD0
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uint16_t chan_config = ((uint16_t) chan) << 5; // DACH ~ DACA
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DAC7578_SetRegByte(hdac, regAddr, pd_config | chan_config);
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}
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void DAC7578_write_dac_power_all(DAC7578_HandleTypeDef* hdac, DAC7578_power_t power) {
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uint8_t regAddr = 0x40;
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uint16_t val = 0x1FE;
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val |= (power & 0x3) << 1;
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DAC7578_SetRegByte(hdac, regAddr, val);
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}
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void DAC7578_dac_ignore_ldac_pin(DAC7578_HandleTypeDef* hdac, uint8_t chan)
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{
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uint8_t regAddr = 0x60;
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uint16_t val = chan << 8;
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DAC7578_SetRegByte(hdac, regAddr, val);
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}
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void DAC7578_all_dac_ignore_ldac_pin(DAC7578_HandleTypeDef* hdac) {
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uint8_t regAddr = 0x60;
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uint16_t val = 0xFF00;
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DAC7578_SetRegByte(hdac, regAddr, val);
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}
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//
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//void DAC7578_read_dac_power(DAC7578_HandleTypeDef* hdac, uint8_t n_dac, DAC7578_power_t *power) {
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// uint8_t regAddr = 0x40;
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// uint16_t val = DAC7578_GetRegByte(hdac, regAddr);
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// val >>= (n_dac + 5);
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// *power = val & 0x03;
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//}
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//HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData,
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// uint16_t Size, uint32_t Timeout);
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//HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData,
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// uint16_t Size, uint32_t Timeout);
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131
DAC7578.h
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131
DAC7578.h
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/**
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The MIT License (MIT)
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Copyright (c) 2024 Sani7
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#ifndef DAC_DAC7578_H
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#define DAC_DAC7578_H
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#include "stm32f0xx_hal.h"
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#include <stdint.h>
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#include <stdbool.h>
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typedef struct {
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I2C_HandleTypeDef *hi2c;
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uint16_t address;
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GPIO_TypeDef *ldac_port;
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uint16_t ldac_pin;
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} DAC7578_HandleTypeDef;
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typedef enum {
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power_on = 0x00,
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power_off_1k = 0x01,
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power_off_100k = 0x02,
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power_off_high_impedance = 0x03
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} DAC7578_power_t;
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/**
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* @brief This function initializes the DAC handle
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* @param hdac The DAC handle
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* @param hi2c The I2C handle the DAC is connected to
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* @param address The I2C address of the DAC (via hardware jumpers)
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*/
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void DAC7578_Init(DAC7578_HandleTypeDef *hdac, I2C_HandleTypeDef *hi2c, uint8_t address, GPIO_TypeDef *ldac_port, uint16_t ldac_pin);
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/**
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* @brief Set the output of a DAC
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* @param hdac The DAC handle
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* @param chan The DAC number (0-7)
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* @param value The 10-bit value to set the DAC to
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* @param update True to update the DAC output, false to only set the input register
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*/
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void DAC7578_set_dac_output(DAC7578_HandleTypeDef *hdac, uint8_t chan, uint16_t value, bool update);
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/**
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* @brief Update one DAC output
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* @param hdac The DAC handle
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* @param chan The DAC number (0-7)
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*/
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void DAC7578_update_dac_output(DAC7578_HandleTypeDef *hdac, uint8_t chan);
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/**
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* @brief Set all dac outputs globally
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* @param hdac The DAC handle
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* @param value The 10-bit value to set the DAC to
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* @param update True to update the DAC output, false to only set the input register
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*/
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void DAC7578_set_dac_output_all(DAC7578_HandleTypeDef *hdac, uint16_t value, bool update);
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/**
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* @brief Update all DAC ouputs
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* @param hdac The DAC handle
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*/
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void DAC7578_update_dac_output_all(DAC7578_HandleTypeDef *hdac);
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/**
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* @brief Read one dac output register
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* @param hdac The DAC handle
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* @param chan The DAC number (0-7)
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* @param value The pointer to the output value
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*/
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void DAC7578_read_dac_output(DAC7578_HandleTypeDef *hdac, uint8_t chan, uint16_t *value);
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/**
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* @brief Read one dac input register
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*
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* @param hdac The DAC handle
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* @param chan The DAC number (0-7)
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* @param value The pointer to the output value
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*/
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void DAC7578_read_dac_input(DAC7578_HandleTypeDef *hdac, uint8_t chan, uint16_t *value);
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/**
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* @brief Set the power mode of a dac
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* @param hdac The DAC handle
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* @param chan The DAC number (0-7)
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* @param power The power mode to set the dac to
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*/
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void DAC7578_write_dac_power(DAC7578_HandleTypeDef* hdac, uint8_t chan, DAC7578_power_t power);
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/**
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* @brief Set the power mode of all dacs
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* @param hdac The DAC handle
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* @param power The power mode to set all dacs to
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*/
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void DAC7578_write_dac_power_all(DAC7578_HandleTypeDef* hdac, DAC7578_power_t power);
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/**
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* @brief This function makes the provided dac channels ignore the ldac pin
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*
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* @param hdac This function makes all dac channels ignore the ldac pin
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* @param chan The channel(s) that have to ignore the ldac pin
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*/
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void DAC7578_dac_ignore_ldac_pin(DAC7578_HandleTypeDef* hdac, uint8_t chan);
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/**
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* @brief This function makes all dac channels ignore the ldac pin
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*
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* @param hdac
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*/
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void DAC7578_all_dac_ignore_ldac_pin(DAC7578_HandleTypeDef* hdac);
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#endif //DAC_DAC7578_H
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