initial commit

fw/hello-world/.gitignore

@@ -0,0 +1,3 @@
+/hello
+/hello.dis
+/firmware.map

fw/hello-world/Makefile

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+
+TARGET  = hello
+C_SRCS  = $(wildcard *.c) 
+HEADERS = $(wildcard *.h)
+CFLAGS += -O0 -g 
+
+BOARD=tgfs-vp
+LINK_TARGET=flash
+RISCV_ARCH:=rv32i
+RISCV_ABI:=ilp32
+LDFLAGS := -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
+
+compiler := $(shell which riscv32-unknown-elf-gcc)
+TOOL_DIR=$(dir $(compiler))
+
+TRIPLET=riscv32-unknown-elf
+BSP_BASE = ../bsp
+include $(BSP_BASE)/env/common-gcc.mk

fw/hello-world/hello.c

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+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "platform.h"
+#include "encoding.h"
+
+int factorial(int i){
+
+	volatile int result = 1;
+	for (int ii = 1; ii <= i; ii++) {
+		result = result * ii;
+	}
+	return result;
+
+}
+
+int main()
+{
+    *(uint32_t*)(GPIO_CTRL_ADDR+GPIO_IOF_SEL) &= ~IOF0_UART0_MASK;
+    *(uint32_t*)(GPIO_CTRL_ADDR+GPIO_IOF_EN)  |= IOF0_UART0_MASK;
+	volatile int result = factorial (10);
+	printf("Factorial is %d\n", result);
+	printf("End of execution");
+	return 0;
+}