2 files changed, 151 insertions, 0 deletions
diff --git a/VexRiscvSocSoftware/projects/murax/demo/src/crt.S b/VexRiscvSocSoftware/projects/murax/demo/src/crt.S
new file mode 100755
index 0000000..0a98a6e
--- /dev/null
+++ b/VexRiscvSocSoftware/projects/murax/demo/src/crt.S
@@ -0,0 +1,97 @@
+.global crtStart
+.global main
+.global irqCallback
+
+crtStart:
+  j crtInit
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+
+.global  trap_entry
+trap_entry:
+  sw x1,  - 1*4(sp)
+  sw x5,  - 2*4(sp)
+  sw x6,  - 3*4(sp)
+  sw x7,  - 4*4(sp)
+  sw x10, - 5*4(sp)
+  sw x11, - 6*4(sp)
+  sw x12, - 7*4(sp)
+  sw x13, - 8*4(sp)
+  sw x14, - 9*4(sp)
+  sw x15, -10*4(sp)
+  sw x16, -11*4(sp)
+  sw x17, -12*4(sp)
+  sw x28, -13*4(sp)
+  sw x29, -14*4(sp)
+  sw x30, -15*4(sp)
+  sw x31, -16*4(sp)
+  addi sp,sp,-16*4
+  call irqCallback
+  lw x1 , 15*4(sp)
+  lw x5,  14*4(sp)
+  lw x6,  13*4(sp)
+  lw x7,  12*4(sp)
+  lw x10, 11*4(sp)
+  lw x11, 10*4(sp)
+  lw x12,  9*4(sp)
+  lw x13,  8*4(sp)
+  lw x14,  7*4(sp)
+  lw x15,  6*4(sp)
+  lw x16,  5*4(sp)
+  lw x17,  4*4(sp)
+  lw x28,  3*4(sp)
+  lw x29,  2*4(sp)
+  lw x30,  1*4(sp)
+  lw x31,  0*4(sp)
+  addi sp,sp,16*4
+  mret
+  .text
+
+
+crtInit:
+  .option push
+  .option norelax
+  la gp, __global_pointer$
+  .option pop
+  la sp, _stack_start
+
+bss_init:
+  la a0, _bss_start
+  la a1, _bss_end
+bss_loop:
+  beq a0,a1,bss_done
+  sw zero,0(a0)
+  add a0,a0,4
+  j bss_loop
+bss_done:
+
+ctors_init:
+  la a0, _ctors_start
+  addi sp,sp,-4
+ctors_loop:
+  la a1, _ctors_end
+  beq a0,a1,ctors_done
+  lw a3,0(a0)
+  add a0,a0,4
+  sw a0,0(sp)
+  jalr  a3
+  lw a0,0(sp)
+  j ctors_loop
+ctors_done:
+  addi sp,sp,4
+
+
+  li a0, 0x880     //880 enable timer + external interrupts
+  csrw mie,a0
+  li a0, 0x1808     //1808 enable interrupts
+  csrw mstatus,a0
+
+  call main
+infinitLoop:
+  j infinitLoop
+
diff --git a/VexRiscvSocSoftware/projects/murax/demo/src/main.c b/VexRiscvSocSoftware/projects/murax/demo/src/main.c
new file mode 100755
index 0000000..9f62ab3
--- /dev/null
+++ b/VexRiscvSocSoftware/projects/murax/demo/src/main.c
@@ -0,0 +1,54 @@
+#include <stdint.h>
+
+#include <murax.h>
+
+
+void main() {
+	volatile uint32_t a = 1, b = 2, c = 3;
+	uint32_t result = 0;
+	char msg[] = "Lieber Franz! Wir wünschen Dir eine gute Zeit!";
+	uint32_t msgidx = 0;
+
+	interruptCtrl_init(TIMER_INTERRUPT);
+	prescaler_init(TIMER_PRESCALER);
+	timer_init(TIMER_A);
+
+	TIMER_PRESCALER->LIMIT = 50000-1; //1 ms rate
+
+	TIMER_A->LIMIT = 1000-1;  //1 second rate
+	TIMER_A->CLEARS_TICKS = 0x00010002;
+
+	TIMER_INTERRUPT->PENDINGS = 0xF;
+	TIMER_INTERRUPT->MASKS = 0x1;
+
+	GPIO_A->OUTPUT_ENABLE = 0x000000FF;
+	GPIO_A->OUTPUT = 0x00000000;
+
+	UART->STATUS = 2; //Enable RX interrupts
+	UART->DATA = 'A';
+
+	while(1){
+		result += a;
+		result += b + c;
+		for(uint32_t idx = 0;idx < 200000;idx++) asm volatile("");
+		if (msgidx == sizeof(msg)-1)
+		  msgidx = 0;
+		else
+		  msgidx++;
+		UART->DATA = msg[msgidx];
+		GPIO_A->OUTPUT = (GPIO_A->OUTPUT & ~0x3F) | ((GPIO_A->OUTPUT + 1) & 0x3F);  //Counter on LED[5:0]
+	}
+}
+
+void irqCallback(){
+	if(TIMER_INTERRUPT->PENDINGS & 1){  //Timer A interrupt
+		GPIO_A->OUTPUT ^= 0x80; //Toogle led 7
+		TIMER_INTERRUPT->PENDINGS = 1;
+	}
+	while(UART->STATUS & (1 << 9)){ //UART RX interrupt
+		UART->DATA = (UART->DATA) & 0xFF;
+	}
+}
+
+
+