Initial version of the UART driver

firmware/Makefile

@@ -5,6 +5,7 @@ ifndef BUILD_DIR
 endif
 
 PARTNUMBER=stm32f103c8t6
+OPENCM3_FAMILY=STM32F1
 
 CC=arm-none-eabi-gcc
 CPP=arm-none-eabi-g++
@@ -23,7 +24,7 @@ INC=.
 CFLAGS=--static -nostartfiles -g3 -Os -fno-common -ffunction-sections -fdata-sections -I. -mcpu=cortex-m3 -mthumb -msoft-float
 
 .PHONY: all
-all: libopencm3_stm32f1.a crt.o main.o
+all: libopencm3_stm32f1.a libs_rule drivers_rule crt.o main.o
 	$(LD) -T$(PARTNUMBER).ld $(BUILD_DIR)/*.o -o $(BUILD_DIR)/$(TARGET).elf -L$(BUILD_DIR)/ -lopencm3_stm32f1
 	$(OBJCOPY) -O binary $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).bin
 	$(SIZE) $(BUILD_DIR)/$(TARGET).elf
@@ -37,7 +38,7 @@ clean:
 	rm $(BUILD_DIR)/*.o $(BUILD_DIR)/*.a $(BUILD_DIR)/*.elf $(BUILD_DIR)/*.bin
 
 main.o: main.c
-	$(CC) -c $(CFLAGS) -Ihal/include/ -DSTM32F1 $< -o $(BUILD_DIR)/$@
+	$(CC) -c $(CFLAGS) -Ihal/include/ -D$(OPENCM3_FAMILY) $< -o $(BUILD_DIR)/$@
 
 crt.o: crt.s
 	$(AS) -o $@ $<
@@ -49,10 +50,9 @@ libopencm3_stm32f1.a: hal/Makefile
 devices: devices/Makefile
 	$(MAKE) BUILD_DIR=$(BUILD_DIR) -C devices
 
-drivers: drivers/Makefile
-	$(MAKE) BUILD_DIR=$(BUILD_DIR) -C drivers
-
-libs: libs/Makefile
+drivers_rule : drivers/Makefile
+	$(MAKE) BUILD_DIR=$(BUILD_DIR) OPENCM3_FAMILY=$(OPENCM3_FAMILY) -C drivers 
+libs_rule: libs/Makefile
 	$(MAKE) BUILD_DIR=$(BUILD_DIR) -C libs
 
 os: os/Makefile

firmware/config/errno.h

@@ -0,0 +1,53 @@
+/*
+ * errno.h
+ * 
+ * Copyright The SLCam Contributors.
+ * 
+ * This file is part of SLCam.
+ * 
+ * SLCam is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * SLCam is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with SLCam. If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+/**
+ * \brief Errors definition.
+ * 
+ * \author Miguel Boing <miguelboing13@gmail.com>
+ * 
+ * \version 0.1.3
+ * 
+ * \date 2023/02/16
+ * 
+ * \defgroup errno Error Codes
+ * \{
+ */
+
+#ifndef ERRNO_H
+#define ERRNO_H
+
+/* No error ocurred */
+#define ERRNO_SUCCESS                        0x00U       /** No errors found */
+
+/* Driver Level errors */
+#define ERRNO_DRIVER_NO_PORT                 0x11U       /** No port found */
+#define ERRNO_DRIVER_NO_PARAMETER            0x12U       /** Invalid parameter value */
+#define ERRNO_DRIVER_FAILED                  0x13U       /** Failed to execute HAL function */             
+
+/* Device Level errors */
+#define ERRNO_DEVICE_FAILED_CONFIG           0x21U       /** Failed to configure driver */
+#define ERRNO_DEVICE_FAILED_COM              0x22U       /** Failed to communicate */
+
+#endif /*ERRNO_H */
+
+/** \} End of errno group */

firmware/drivers/Makefile

@@ -4,8 +4,9 @@ endif
 
 .PHONY: all
 all:
-	$(MAKE) BUILD_DIR=$(BUILD_DIR) -C ov2640
-	$(MAKE) BUILD_DIR=$(BUILD_DIR) -C w25qxxx
+#	$(MAKE) BUILD_DIR=$(BUILD_DIR) -C ov2640
+#	$(MAKE) BUILD_DIR=$(BUILD_DIR) -C w25qxxx
+	$(MAKE) BUILD_DIR=$(BUILD_DIR) OPENCM3_FAMILY=$(OPENCM3_FAMILY) -C uart
 
 .PHONY: clean
 clean:

firmware/drivers/uart/Makefile

@@ -0,0 +1,29 @@
+TARGET=uart
+
+ifndef BUILD_DIR
+	BUILD_DIR=$(CURDIR)
+endif
+
+PARTNUMBER=stm32f103c8t6
+
+CC=arm-none-eabi-gcc
+CPP=arm-none-eabi-g++
+AS=arm-none-eabi-as
+LD=arm-none-eabi-ld
+OBJCOPY=arm-none-eabi-objcopy
+OBJDUMP=arm-none-eabi-objdump
+READELF=arm-none-eabi-readelf
+NM=arm-none-eabi-nm
+SIZE=arm-none-eabi-size
+GDB=arm-none-eabi-gdb
+
+LIBS= -I../../ -I../../hal/include/
+CFLAGS=-c -mcpu=cortex-m3 -mthumb -O0 $(LIBS) -D$(OPENCM3_FAMILY)
+
+.PHONY: all
+all:
+	$(CC) $(CFLAGS) $(TARGET).c -o $(BUILD_DIR)/$(TARGET).o
+
+.PHONY: clean
+clean:
+	rm $(BUILD_DIR)/*.o