fw: moving forward a bit

firmware/build_and_strip.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/sh
+
+cargo build --release
+riscv64-unknown-elf-objcopy -S -O binary target/riscv32i-unknown-none-elf/release/fw fw.bin

firmware/openocd.cfg

@@ -0,0 +1,17 @@
+set _CHIPNAME riscv
+jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x21000000
+
+set _TARGETNAME $_CHIPNAME.cpu
+
+target create $_TARGETNAME.0 riscv -chain-position $_TARGETNAME
+$_TARGETNAME.0 configure -work-area-phys 0x80000000 -work-area-size 10000 -work-area-backup 1
+
+#flash bank spi0 fespi 0x40000000 0 0 0 $_TARGETNAME.0 0x20004000
+init
+if {[ info exists pulse_srst]} {
+  ftdi_set_signal nSRST 0
+  ftdi_set_signal nSRST z
+}
+halt
+#flash protect 0 64 last off
+echo "Ready for Remote Connections"

firmware/src/eth.rs

@@ -1,7 +1,6 @@
 //! Quick and hacky ethernet thing to test
 
-const LITEETH_BASE: u32 = 0x0050_0000;
-
+const LITEETH_BASE: u32 = 0x0200_0000;
 
 const ETHMAC_SRAM_WRITER_EV_PENDING: u32 = LITEETH_BASE + 0x810;
 const ETHMAC_SRAM_WRITER_EV_ENABLE: u32 = LITEETH_BASE + 0x814;
@@ -9,12 +8,16 @@ const ETHMAC_SRAM_READER_EV_PENDING: u32 = LITEETH_BASE + 0x830;
 const ETHMAC_SRAM_READER_EV_ENABLE: u32 = LITEETH_BASE + 0x834;
 
 fn write_u32_reg(addr: u32, value: u32) {
-    unsafe { *(addr as *mut u32) = value; }
+    use core::ptr::write;
+    unsafe {
+        write(addr as *mut u32, value);
+    }
 }
 
 fn read_u32_reg(addr: u32) -> u32 {
+    use core::ptr::read;
     unsafe {
-        return *(addr as *mut u32);
+        return read(addr as *mut u32);
     }
 }
 
@@ -35,7 +38,4 @@ pub fn init() {
     write_u32_reg(ETHMAC_SRAM_READER_EV_ENABLE, 0);
 }
 
-pub fn tranmsit() {
-
-}
-
+pub fn tranmsit() {}

firmware/src/main.rs

@@ -21,13 +21,12 @@ fn main() -> ! {
         500_000
     };
 
-
     // do something here
     loop {
         unsafe {
-            write(0x01002000 as *mut u32, 0);
+            write_led(0);
             busy_wait(blink_period);
-            write(0x01002000 as *mut u32, 1);
+            write_led(1);
             busy_wait(blink_period);
         }
     }
@@ -35,10 +34,14 @@ fn main() -> ! {
 
 fn busy_wait(num_nops: u32) {
     for _ in 0..num_nops {
-        unsafe { asm!("nop"); }
+        unsafe {
+            asm!("nop");
+        }
     }
 }
 
 fn write_led(val: u32) {
-    unsafe { write(0x01002000 as *mut u32, val); }
+    unsafe {
+        write(0x01002000 as *mut u32, val);
+    }
 }