diff --git a/peripherals/cc48x6/build.md b/peripherals/cc48x6/build.md
new file mode 100644
index 0000000..91d6d0a
--- /dev/null
+++ b/peripherals/cc48x6/build.md
@@ -0,0 +1,5 @@
+```
+sudo docker run --rm -ti -v /.../fiatlux/:/src alpine:latest
+apk add make gcc-arm-none-eabi newlib-arm-none-eabi
+make
+```
diff --git a/peripherals/cc48x6/calc_lookup.ods b/peripherals/cc48x6/calc_lookup.ods
new file mode 100644
index 0000000..5f0e655
Binary files /dev/null and b/peripherals/cc48x6/calc_lookup.ods differ
diff --git a/peripherals/cc48x6/firmware/Makefile b/peripherals/cc48x6/firmware/Makefile
index d73a2aa..cc25610 100644
--- a/peripherals/cc48x6/firmware/Makefile
+++ b/peripherals/cc48x6/firmware/Makefile
@@ -181,13 +181,8 @@ $(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)
 $(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
 	$(AS) -c $(CFLAGS) $< -o $@
 
-$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile $(VERSIONCMD)
-	$(V)mkdir -p  $(dir $@)
-	$(V)$(eval VERSION_OBJECT = $(shell mktemp /tmp/fiatlux_version_object.XXXXXX.o))
-	$(V)$(VERSIONCMD) $(notdir $@) $(VERSION_OBJECT) $(CC) $(CPPFLAGS) $(CXXFLAGS)
-	@echo link $@
-	$(V)$(CC) $(OBJECTS) $(VERSION_OBJECT) $(LDFLAGS) -o $@
-	$(V)rm $(VERSION_OBJECT)
+$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
+	$(V)$(CC) $(OBJECTS) $(LDFLAGS) -o $@
 	$(SZ) $@
 
 $(BUILD_DIR)/%.hex: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
@@ -210,4 +205,4 @@ clean:
 #######################################
 -include $(wildcard $(BUILD_DIR)/*.d)
 
-# *** EOF ***
\ No newline at end of file
+# *** EOF ***
diff --git a/peripherals/cc48x6/firmware/Src/main.c b/peripherals/cc48x6/firmware/Src/main.c
index 1198d8d..3b17891 100644
--- a/peripherals/cc48x6/firmware/Src/main.c
+++ b/peripherals/cc48x6/firmware/Src/main.c
@@ -68,7 +68,13 @@ uint16_t counter = 0;
 volatile bool dirty = true;
 //uint16_t mem[12] = {0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF};
 //uint16_t mem[12] = {0x300, 0x40, 0x300, 0x40, 0x300, 0x40, 0x300, 0x40, 0x300, 0x40, 0x300, 0x40};
-uint16_t mem[12] = {0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF};
+//uint16_t mem[12] = {0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF, 0xFFF, 0xFF};
+uint16_t mem[12] = {0x300, 0xff, 0x300, 0xff, 0x300, 0xff, 0x300, 0xff, 0x300, 0xff, 0x300, 0xff};
+
+
+uint16_t lookup_ana[256] = {0, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 750, 755, 771, 787, 803, 819, 835, 851, 867, 883, 899, 915, 931, 947, 964, 980, 996, 1012, 1028, 1044, 1060, 1076, 1092, 1108, 1124, 1140, 1156, 1172, 1188, 1204, 1220, 1237, 1253, 1269, 1285, 1301, 1317, 1333, 1349, 1365, 1381, 1397, 1413, 1429, 1445, 1461, 1477, 1493, 1510, 1526, 1542, 1558, 1574, 1590, 1606, 1622, 1638, 1654, 1670, 1686, 1702, 1718, 1734, 1750, 1766, 1783, 1799, 1815, 1831, 1847, 1863, 1879, 1895, 1911, 1927, 1943, 1959, 1975, 1991, 2007, 2023, 2039, 2056, 2072, 2088, 2104, 2120, 2136, 2152, 2168, 2184, 2200, 2216, 2232, 2248, 2264, 2280, 2296, 2312, 2329, 2345, 2361, 2377, 2393, 2409, 2425, 2441, 2457, 2473, 2489, 2505, 2521, 2537, 2553, 2569, 2585, 2602, 2618, 2634, 2650, 2666, 2682, 2698, 2714, 2730, 2746, 2762, 2778, 2794, 2810, 2826, 2842, 2858, 2875, 2891, 2907, 2923, 2939, 2955, 2971, 2987, 3003, 3019, 3035, 3051, 3067, 3083, 3099, 3115, 3131, 3148, 3164, 3180, 3196, 3212, 3228, 3244, 3260, 3276, 3292, 3308, 3324, 3340, 3356, 3372, 3388, 3404, 3421, 3437, 3453, 3469, 3485, 3501, 3517, 3533, 3549, 3565, 3581, 3597, 3613, 3629, 3645, 3661, 3677, 3694, 3710, 3726, 3742, 3758, 3774, 3790, 3806, 3822, 3838, 3854, 3870, 3886, 3902, 3918, 3934, 3950, 3967, 3983, 3999, 4015, 4031, 4047, 4063, 4079, 4095};
+
+uint16_t lookup_pwm[256] = {0, 6, 11, 17, 22, 28, 33, 39, 44, 50, 55, 61, 67, 72, 78, 83, 89, 94, 100, 105, 111, 116, 122, 128, 133, 139, 144, 150, 155, 161, 166, 172, 177, 183, 188, 194, 200, 205, 211, 216, 222, 227, 233, 238, 244, 249, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255};
 
 uint16_t conf[8] = {version, 0, 0, 0, 0, 0, 0, 0};
 
@@ -88,50 +94,6 @@ void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) {
 
 void HAL_SPI_CpltCallback(SPI_HandleTypeDef *hspi) {
 
-    if(RX_Buffer[0]) {
-        union {
-            struct {
-                unsigned data: 12;
-                unsigned chan: 4;
-            } __attribute__((packed));
-            uint16_t raw;
-
-        } frame = {.raw=RX_Buffer[0]};
-
-        toggle = !toggle;
-        counter++;
-
-        if(toggle) {
-            HAL_GPIO_WritePin(SIGNAL_LED_GPIO_Port, SIGNAL_LED_Pin, GPIO_PIN_SET);
-        } else {
-            HAL_GPIO_WritePin(SIGNAL_LED_GPIO_Port, SIGNAL_LED_Pin, GPIO_PIN_RESET);
-        }
-
-        if(frame.chan <= 6 && frame.chan >= 1) {
-            frame.chan--;
-            if(frame.data > 0x300) {
-                mem[frame.chan * 2 + 1] = 0xFF;
-                mem[frame.chan * 2] = frame.data;
-            } else {
-                mem[frame.chan * 2 + 1] = (frame.data * 0xFF) / 0x300;
-                mem[frame.chan * 2] = 0x300;
-            }
-
-            dirty = true;
-            TX_Buffer[0] = RX_Buffer[0];
-
-        } else if(frame.chan == 15 && frame.data < 8) {
-            TX_Buffer[0] = conf[frame.data];
-        } else {
-            TX_Buffer[0] = 0;
-        }
-
-    }
-
-    HAL_GPIO_WritePin(INIT_OUT_GPIO_Port, INIT_OUT_Pin, GPIO_PIN_SET);
-    for (volatile int i = 0; i < 3; i++);
-    HAL_GPIO_WritePin(INIT_OUT_GPIO_Port, INIT_OUT_Pin, GPIO_PIN_RESET);
-
 }
 
 void HAL_SPI_RxCpltCallback(SPI_HandleTypeDef *hspi) {
@@ -185,7 +147,7 @@ int main(void) {
     MX_TIM3_Init();
     /* USER CODE BEGIN 2 */
     MX_SPI1_Init();
-    MX_SPI2_Init();
+    //MX_SPI2_Init();
 
     TIM1->ARR = 254;
     TIM1->CCR1 = 10;
@@ -209,7 +171,48 @@ int main(void) {
     TIM3->BDTR |= TIM_BDTR_MOE; // Enable Main Output
     TIM3->CR1 |= TIM_CR1_CEN; // Enable Counter
 
-    HAL_GPIO_WritePin(SIGNAL_LED_GPIO_Port, SIGNAL_LED_Pin, GPIO_PIN_RESET);
+/*
+    // GPIO CONFIG I2C2
+    RCC->AHBENR |= RCC_AHBENR_GPIOBEN; // Eneable Clock
+    GPIOB->MODER &= ~(GPIO_MODER_MODER14_Msk | GPIO_MODER_MODER13_Msk);
+    GPIOB->MODER |= GPIO_MODER_MODER14_1 | GPIO_MODER_MODER13_1; // GPIOB 14 & 13 -> Alternate Function
+    GPIOB->AFR[1] &= ~(GPIO_AFRH_AFSEL14_Msk | GPIO_AFRH_AFSEL13_Msk);
+    GPIOB->AFR[1] |= (5 << GPIO_AFRH_AFSEL14_Pos) | (5 << GPIO_AFRH_AFSEL13_Pos); // AF5 (I2C2)
+    GPIOB->OTYPER |= (GPIO_OTYPER_OT_14 | GPIO_OTYPER_OT_13); // Output type: open drain
+    GPIOB->PUPDR &= ~(GPIO_PUPDR_PUPDR14_Msk | GPIO_PUPDR_PUPDR13_Msk);
+    GPIOB->PUPDR |= GPIO_PUPDR_PUPDR14_0 | GPIO_PUPDR_PUPDR13_0; // Enable Internal Pull up
+
+
+    // Enable I2C2
+    RCC->APB1ENR |= RCC_APB1ENR_I2C2EN; // Eneable Clock
+    I2C2->CR1 &= ~I2C_CR1_PE; // Reset Periph.
+    //while(I2C2->CR1 & I2C_CR1_PE) {}
+
+    I2C2->OAR1 = I2C_OAR1_OA1EN | (5 << 1); // Enable, Addr: 5
+    I2C2->OAR2 = 0;
+    I2C2->CR1 |= I2C_CR1_NOSTRETCH; //Disable Clock stretching
+    I2C2->CR1 |= I2C_CR1_PE; // Enable Periph
+*/
+
+    // GPIO CONFIG UART2
+    RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
+    GPIOA->MODER &= ~GPIO_MODER_MODER3_Msk;
+    GPIOA->MODER |= GPIO_MODER_MODER3_1; //GPIOA3 Alternate Function
+    GPIOA->AFR[0] &= ~GPIO_AFRL_AFSEL3_Msk;
+    GPIOA->AFR[0] |= 1 << GPIO_AFRL_AFSEL3_Pos; // AF1 -> UART2
+    GPIOA->OTYPER |= GPIO_OTYPER_OT_3;
+
+    // Enable UART2
+    RCC->APB1ENR |= RCC_APB1ENR_USART2EN;
+    USART2->CR1 = 0;
+    USART2->CR2 = 0;
+    USART2->CR3 = 0;
+
+    USART2->BRR = 48000000 / 115200;
+    //USART2->CR1 = USART_CR1_RE | USART_CR1_UE;
+    USART2->CR1 = USART_CR1_RXNEIE | USART_CR1_RE | USART_CR1_UE;
+    NVIC_EnableIRQ(USART2_IRQn);
+
 
     uint16_t frame = 0b1001000000000000; // DAC128S085: Enable Write Through mode (Instant output change on write)
     HAL_SPI_Transmit(&hspi1, (uint8_t * ) & frame, 1, 100);
@@ -241,28 +244,70 @@ int main(void) {
         /* USER CODE END WHILE */
 
         /* USER CODE BEGIN 3 */
+	//HAL_Delay(1000);
+
+	GPIOA->ODR ^= 0x08;
+
+	if (0) {//(USART2->ISR & USART_ISR_RXNE) { //(I2C2->ISR & I2C_ISR_ADDR) {
+		uint16_t v = USART2->RDR;
+		for(int i = 0; i < 12; i++) mem[i] = v;
+		for(int i = 0; i < 12; i+=2) mem[i] = 0xfff;
+		//mem[0] = 0xfff; mem[1] = 0xff;
+	}
 
 
-        //if(dirty) {
-        for (int i = 0; i < 6; ++i) {
-            setDAC(i, mem[i * 2]);
+        if(dirty) {
+		for (int i = 0; i < 6; ++i) {
+		    setDAC(i, mem[i * 2]);
+		}
+
+		TIM1->CCR1 = 0xFF & mem[1];
+		TIM1->CCR2 = 0xFF & mem[3];
+		TIM1->CCR3 = 0xFF & mem[5];
+		TIM1->CCR4 = 0xFF & mem[7];
+		TIM3->CCR1 = 0xFF & mem[9];
+		TIM3->CCR2 = 0xFF & mem[11];
+
+		dirty = false;
         }
 
-        TIM1->CCR1 = 0xFF & mem[1];
-        TIM1->CCR2 = 0xFF & mem[3];
-        TIM1->CCR3 = 0xFF & mem[5];
-        TIM1->CCR4 = 0xFF & mem[7];
-        TIM3->CCR1 = 0xFF & mem[9];
-        TIM3->CCR2 = 0xFF & mem[11];
-
-        dirty = false;
-
-        //}
-
     }
     /* USER CODE END 3 */
 }
 
+volatile uint8_t uart_proto_state = 0;
+
+void USART2_IRQHandler(void)
+{
+    if (USART2->ISR & USART_ISR_RXNE)
+    {
+        uint16_t v = USART2->RDR;
+	if (uart_proto_state == 0) {
+		uart_proto_state = v;
+		if (v == 0) dirty = true;
+	}else{
+		uint16_t idx = (uart_proto_state - 1) / 2;
+		if (idx < sizeof(mem) / sizeof(mem[0]))
+		{
+			if(uart_proto_state & 1) {
+				mem[idx] &= 0x00ff;
+				mem[idx] |= (v << 8) & 0xff00;
+			}else{
+				mem[idx] &= 0xff00;
+				mem[idx] |= v & 0x00ff;
+			}
+		}
+		if (uart_proto_state == 128) {
+			for(int i = 0; i < 6; i++) {
+				mem[i*2+0] = lookup_ana[v];
+				mem[i*2+1] = lookup_pwm[v];
+			}
+		}
+		uart_proto_state = 0;
+	}
+    }
+}
+
 /**
   * @brief System Clock Configuration
   * @retval None
diff --git a/peripherals/cc48x6/firmware/Src/tim.c b/peripherals/cc48x6/firmware/Src/tim.c
index 4e674f1..9ef8dc0 100644
--- a/peripherals/cc48x6/firmware/Src/tim.c
+++ b/peripherals/cc48x6/firmware/Src/tim.c
@@ -43,7 +43,7 @@ void MX_TIM1_Init(void)
 
   /* USER CODE END TIM1_Init 1 */
   htim1.Instance = TIM1;
-  htim1.Init.Prescaler = 0;
+  htim1.Init.Prescaler = 90;
   htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
   htim1.Init.Period = 65535;
   htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
@@ -114,7 +114,7 @@ void MX_TIM3_Init(void)
 
   /* USER CODE END TIM3_Init 1 */
   htim3.Instance = TIM3;
-  htim3.Init.Prescaler = 0;
+  htim3.Init.Prescaler = 90;
   htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
   htim3.Init.Period = 65535;
   htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
diff --git a/peripherals/cc48x6/test.py b/peripherals/cc48x6/test.py
new file mode 100644
index 0000000..47b9b66
--- /dev/null
+++ b/peripherals/cc48x6/test.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+import serial
+import time
+ser = serial.Serial("/dev/ttyUSB0", 115200)
+
+def setCh(ch, ana, pwm):
+    ser.write(bytearray([ch*4+1, ana >> 8, ch*4+2, ana & 0xff, ch*4+4, pwm, 0,0]))
+
+def setG(val):
+    ser.write(bytearray([128,val,0]))
+
+setCh(0,0,0)
+setCh(1,0,0)
+setCh(2,0,0)
+setCh(3,0,0)
+setCh(4,0,0)
+setCh(5,0,0)
+
+if False: #for i in range(0, 4095, 5):
+    print(i)
+    setCh(0,i,255)
+    time.sleep(0.1)
+
+for i in range(255):
+    print(i)
+    setG(i)
+    time.sleep(0.5)