diff options
Diffstat (limited to 'bootrom/demo')
-rw-r--r-- | bootrom/demo/Makefile | 5 | ||||
-rw-r--r-- | bootrom/demo/demo.S | 71 | ||||
-rw-r--r-- | bootrom/demo/hello_msg.txt | 37 |
3 files changed, 0 insertions, 113 deletions
diff --git a/bootrom/demo/Makefile b/bootrom/demo/Makefile deleted file mode 100644 index dfe3663..0000000 --- a/bootrom/demo/Makefile +++ /dev/null @@ -1,5 +0,0 @@ -PROG := demo -SRCS := demo.S -EXTRAS := hello_msg.txt - -include ../bram.mk diff --git a/bootrom/demo/demo.S b/bootrom/demo/demo.S deleted file mode 100644 index c6f2618..0000000 --- a/bootrom/demo/demo.S +++ /dev/null @@ -1,71 +0,0 @@ -#define UART_BASE 0x48000000 -#define SPI_BASE 0x48001000 -#define GPIO_BASE 0x48002000 - -#ifndef CFG_STRING -#error Must define CFG_STRING -#endif - - .globl _start -_start: - j uart_init - nop - nop - .word cfgstr - -uart_init: - // a1 = UART_TX - // a2 = hello_msg_end - // for (a0 = hello_msg_start; a0 != a2; ++ a0){ - // while (a3 = TX_READY == 0); - // a3 = *a0 - // *a1 = a3 - // } - - la a0, hello_msg_start - la a2, hello_msg_end - li a1, UART_BASE - -uart_loop: - lw a3, 4(a1) // Wait until non-zero (uart can send data). - beqz a3, uart_loop - - lb a3, 0(a0) // read the next character in hello_msg - sw a3, 0(a1) // Write the current character. - addi a0, a0, 1 // increment the pointer. - bne a0, a2, uart_loop - -gpio_init: - li a0, GPIO_BASE - li t0, 0xFFFF0000 - sw t0, 4(a0) - -gpio_loop: - // For Red LEDs, increment manually. - li t0, 0x1 - sw t0, (a0) - li t0, 0x2 - sw t0, (a0) - li t0, 0x4 - sw t0, (a0) - li t0, 0x8 - sw t0, (a0) - - // For Blue and Green LEDs, sample the switches & buttons - - lw t0, (a0) - srli t0, t0, 16 - andi t0, t0, 0xFF - slli t0, t0, 4 - sw t0, (a0) - - j gpio_loop - - .section .rodata - -hello_msg_start: - .incbin "hello_msg.txt" -hello_msg_end: - -cfgstr: - .incbin CFG_STRING diff --git a/bootrom/demo/hello_msg.txt b/bootrom/demo/hello_msg.txt deleted file mode 100644 index c3cb3f2..0000000 --- a/bootrom/demo/hello_msg.txt +++ /dev/null @@ -1,37 +0,0 @@ -
- SIFIVE, INC.
-
- 5555555555555555555555555
- 5555 5555
- 5555 5555
- 5555 5555
- 5555 5555555555555555555555
- 5555 555555555555555555555555
- 5555 5555
- 5555 5555
- 5555 5555
-5555555555555555555555555555 55555
- 55555 555555555 55555
- 55555 55555 55555
- 55555 5 55555
- 55555 55555
- 55555 55555
- 55555 55555
- 55555 55555
- 55555 55555
- 555555555
- 55555
- 5
-
- SiFive RISC-V Coreplex
-
-Welcome to the Arty FPGA Freedom E Dev Kit.
-The red LEDs are blinking very fast and appear
-dim. Try pressing the buttons and switches to control
-the blue and green LEDs. You can try using the
-debugger to step through the boot code.
-
-
-
-
-
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