driver: ltc2631

firmware/shared_libs/drivers/ad9833/ad9833.c

@@ -147,13 +147,13 @@ void ad9833_setMode(ad9833_handle_t *hfg, AD_mode_t mode)
 static uint32_t ad9833_calcFreq(float f)
 // Calculate register value for AD9833 frequency register from a frequency
 {
-	return (uint32_t)((f * AD_2POW28 / AD_MCLK) + 0.5);
+	return (uint32_t)((f * AD_2POW28 / AD_MCLK) + 0.5f);
 }
 
 static uint16_t ad9833_calcPhase(float a)
 // Calculate the value for AD9833 phase register from given phase in tenths of a degree
 {
-	return (uint16_t)((512.0 * (a / 10) / 45) + 0.5);
+	return (uint16_t)((512.0f * (a / 10) / 45) + 0.5f);
 }
 
 void ad9833_setFrequency(ad9833_handle_t *hfg, AD_channel_t chan, float freq)

firmware/shared_libs/drivers/ad9833/ad9833_def.h

@@ -1,8 +1,6 @@
 // Author: https://github.com/MajicDesigns/MD_AD9833
 #pragma once
 
-#include "main.h"
-
 /** @}*/
 
 // AD9833 Control Register bit definitions

firmware/shared_libs/drivers/ltc2631/ltc2631.c

@@ -0,0 +1,90 @@
+#include "main.h"
+#include "ltc2631.h"
+
+void ltc2631_transmit(ltc2631_handle_t *hdac, uint8_t *data)
+{
+	HAL_I2C_Master_Transmit(hdac->hi2c, hdac->addr, data, 3, 1);
+}
+
+void ltc2631_init(ltc2631_handle_t *hdac, I2C_HandleTypeDef *hi2c, uint8_t addr, ltc2631_res_t res, float ref)
+{
+	hdac->hi2c = hi2c;
+	hdac->addr = addr;
+	hdac->resolution = res;
+	hdac->ref_voltage_f = ref;
+	hdac->ref_voltage_u = ref * 1000U;
+}
+
+void ltc2631_setOutputVoltage_f(ltc2631_handle_t *hdac, float volt)
+{
+	uint16_t value = 0;
+	uint8_t data[3] = {0};
+
+	if (volt > hdac->ref_voltage_f)
+	{
+		volt = hdac->ref_voltage_f;
+	}
+
+	if (volt < 0)
+	{
+		volt = 0;
+	}
+
+	value = (volt / hdac->ref_voltage_f + 0.005f) * (hdac->resolution - 1);
+
+	value = value << (16 - hdac->resolution);
+	data[0] = LTC_WRTIEUPDATE;
+	data[1] = (value >> 8);
+	data[2] = value;
+
+	ltc2631_transmit(hdac, data);
+}
+void ltc2631_setOutputVoltage_u(ltc2631_handle_t *hdac, uint32_t volt_x1000)
+{
+	uint16_t value = 0;
+	uint8_t data[3] = {0};
+
+	if (volt_x1000 > hdac->ref_voltage_u)
+	{
+		volt_x1000 = hdac->ref_voltage_u;
+	}
+
+	if (volt_x1000 < 0)
+	{
+		volt_x1000 = 0;
+	}
+
+	value = (volt_x1000 * (hdac->resolution - 1)) / hdac->ref_voltage_u;
+
+	value = value << (16 - hdac->resolution);
+	data[0] = LTC_WRTIEUPDATE;
+	data[1] = (value >> 8);
+	data[2] = value;
+
+	ltc2631_transmit(hdac, data);
+}
+
+void ltc2631_setOutputValue(ltc2631_handle_t *hdac, uint16_t value)
+{
+	uint8_t data[3] = {0};
+
+	if (value >= (1 << hdac->resolution))
+	{
+		value = (1 << hdac->resolution) - 1;
+	}
+
+	value = value << (16 - hdac->resolution);
+	data[0] = LTC_WRTIEUPDATE;
+	data[1] = (value >> 8);
+	data[2] = value;
+
+	ltc2631_transmit(hdac, data);
+}
+
+void ltc2631_sleep(ltc2631_handle_t *hdac)
+{
+	uint8_t data[3] = {0};
+	data[0] = LTC_SLEEP;
+
+	ltc2631_transmit(hdac, data);
+}

firmware/shared_libs/drivers/ltc2631/ltc2631.h

@@ -0,0 +1,34 @@
+#pragma once
+
+//                                   C3 C2 C1 C0
+#define LTC_WRITE 0b00000000       // 0  0  0  0  Write to Input Register
+#define LTC_UPDATE 0b00010000      // 0  0  0  1  Update (Power Up) DAC Register
+#define LTC_WRTIEUPDATE 0b00110000 // 0  0  1  1  Write to and Update (Power Up) DAC Register
+#define LTC_SLEEP 0b01000000       // 0  1  0  0  Power Down
+#define LTC_INTERNALREF 0b01100000 // 0  1  1  0  Select Internal Reference
+#define LTC_EXTERNALREF 0b01110000 // 0  1  1  1  Select External Reference
+
+#define LTC_REF_2V5 2.5
+#define LTC_REF_4V096 4.096
+
+typedef enum
+{
+    LTC2631_8BIT = 8,
+    LTC2631_10BIT = 10,
+    LTC2631_12BIT = 12
+} ltc2631_res_t;
+
+typedef struct
+{
+    I2C_HandleTypeDef *hi2c;
+    uint8_t addr;
+    ltc2631_res_t resolution;
+    float ref_voltage_f;
+    uint32_t ref_voltage_u;
+} ltc2631_handle_t;
+
+void ltc2631_init(ltc2631_handle_t *hdac, I2C_HandleTypeDef *hi2c, uint8_t addr, ltc2631_res_t res, float ref);
+void ltc2631_setOutputVoltage_f(ltc2631_handle_t *hdac, float volt);
+void ltc2631_setOutputVoltage_u(ltc2631_handle_t *hdac, uint32_t volt_x1000);
+void ltc2631_setOutputValue(ltc2631_handle_t *hdac, uint16_t value);
+void ltc2631_sleep(ltc2631_handle_t *hdac);