Added back in the jtag bridge

Now talking over the bus instead of using dpram

sw/blinky/Makefile

@@ -1,56 +0,0 @@
-TOOLCHAIN_PREFIX ?= riscv64-elf-
-
-CC      := $(TOOLCHAIN_PREFIX)gcc
-OBJCOPY := $(TOOLCHAIN_PREFIX)objcopy
-OBJDUMP := $(TOOLCHAIN_PREFIX)objdump
-SIZE    := $(TOOLCHAIN_PREFIX)size
-
-TARGET  := blinky
-SRCS_C  := blinky.c
-SRCS_S  := start.s
-OBJS    := $(SRCS_C:.c=.o) $(SRCS_S:.s=.o)
-
-ARCH_FLAGS := -march=rv32i_zicsr -mabi=ilp32
-CFLAGS     := $(ARCH_FLAGS) -Os -ffreestanding -fno-builtin -Wall -Wextra
-ASFLAGS    := $(ARCH_FLAGS)
-LDFLAGS    := $(ARCH_FLAGS) -nostdlib -nostartfiles -Wl,-Bstatic,-Tlink.ld,--gc-sections,-Map,$(TARGET).map
-
-HEX_TO_COE := ../../scripts/hex_to_coe.py
-HEX_TO_MIF := ../../scripts/hex_to_mif.py
-
-.PHONY: all clean disasm size
-
-all: $(TARGET).elf $(TARGET).bin $(TARGET).hex $(TARGET).coe $(TARGET).mif $(TARGET).elf.asm
-
-$(TARGET).elf: $(OBJS) link.ld
-	$(CC) $(LDFLAGS) -o $@ $(OBJS)
-
-%.o: %.c
-	$(CC) $(CFLAGS) -c -o $@ $<
-
-%.o: %.s
-	$(CC) $(ASFLAGS) -c -o $@ $<
-
-$(TARGET).bin: $(TARGET).elf
-	$(OBJCOPY) -O binary $< $@
-
-$(TARGET).hex: $(TARGET).bin
-	hexdump -v -e '1/1 "%02x\n"' $< > $@
-
-$(TARGET).coe: $(TARGET).hex
-	$(HEX_TO_COE) $< $@
-
-$(TARGET).mif: $(TARGET).hex
-	$(HEX_TO_MIF) $< $@
-
-$(TARGET).elf.asm: $(TARGET).elf
-	$(OBJDUMP) -d -S $< > $@
-
-disasm: $(TARGET).elf.asm
-
-size: $(TARGET).elf
-	$(SIZE) $<
-
-clean:
-	rm -f $(TARGET).elf $(TARGET).bin $(TARGET).hex $(TARGET).coe $(TARGET).mif \
-		$(TARGET).elf.asm $(TARGET).map $(OBJS)

sw/blinky/blinky.c

@@ -1,27 +0,0 @@
-#include <stdint.h>
-
-#define GPIO_BASE 0x40000000u
-#define VOUT_BASE 0x40000004u
-
-static volatile uint32_t * const gpio = (volatile uint32_t *)GPIO_BASE;
-static volatile uint32_t * const vout = (volatile uint32_t *)VOUT_BASE;
-
-static void delay(volatile uint32_t ticks){
-    while (ticks--) {
-        __asm__ volatile ("nop");
-    }
-}
-
-int main(void)
-{
-    uint32_t v = 0;
-
-    for (;;) {
-        for(int i=0; i<1000; i++){
-            *vout = v;
-            v++;
-            delay(5u);
-        }
-        *gpio ^= 0xffffffff;
-    }
-}

sw/blinky/link.ld

@@ -1,33 +0,0 @@
-OUTPUT_ARCH("riscv")
-ENTRY(_start)
-
-MEMORY
-{
-  RAM (rwx) : ORIGIN = 0x00000000, LENGTH = 8064
-}
-
-SECTIONS
-{
-  .text :
-  {
-    KEEP(*(.text.init))
-    *(.text .text.*)
-    *(.rodata .rodata.*)
-  } > RAM
-
-  .data :
-  {
-    *(.data .data.*)
-  } > RAM
-
-  .bss (NOLOAD) :
-  {
-    __bss_start = .;
-    *(.bss .bss.*)
-    *(COMMON)
-    __bss_end = .;
-  } > RAM
-
-  . = ALIGN(4);
-  __stack_top = ORIGIN(RAM) + LENGTH(RAM);
-}

sw/blinky/start.s

@@ -1,23 +0,0 @@
-.section .text.init
-.globl _start
-.type _start, @function
-
-_start:
-    la sp, __stack_top
-
-    # Zero .bss
-    la t0, __bss_start
-    la t1, __bss_end
-1:
-    bgeu t0, t1, 2f
-    sw zero, 0(t0)
-    addi t0, t0, 4
-    j 1b
-
-2:
-    call main
-
-3:
-    j 3b
-
-.size _start, .-_start

sw/sweep/Makefile

@@ -35,7 +35,7 @@ $(TARGET).bin: $(TARGET).elf
 	$(OBJCOPY) -O binary $< $@
 
 $(TARGET).hex: $(TARGET).bin
-	hexdump -v -e '1/1 "%02x\n"' $< > $@
+	hexdump -v -e '1/4 "%08x\n"' $< > $@
 
 $(TARGET).coe: $(TARGET).hex
 	$(HEX_TO_COE) $< $@

sw/sweep/link.ld

@@ -31,5 +31,5 @@ SECTIONS
   } > RAM
 
   . = ALIGN(4);
-  __stack_top = ORIGIN(RAM) + LENGTH(RAM) - 256;
+  __stack_top = ORIGIN(RAM) + LENGTH(RAM);
 }

sw/sweep/sweep.c

@@ -26,7 +26,7 @@ static inline void irq_init() {
 
 void timer_isr(){
     static int set = 0;
-    *TIMER = 1840000*4;
+    *TIMER = 1840000*2;
     *LEDGR = ~(*LEDGR);
 }
 
@@ -34,7 +34,7 @@ void main(){
     irq_init();
 
     *LEDGR = 3;
-    *TIMER = 1840000*4;
+    *TIMER = 1840000*2;
 
     for(;;){
         for(int i=1000; i<10000; i++){