First throw at UART.

2023-01-12 13:34:46 -06:00
parent 7e97784992
commit ab46236816
8 changed files with 554 additions and 417 deletions
--- a/hw/efinix_fpga/test_programs/uart.s
+++ b/hw/efinix_fpga/test_programs/uart.s
@@ -0,0 +1,28 @@
+.code
+
+UART_TX = $efe6
+UART_RX = UART_TX
+UART_STATUS = $efe7
+UART_CONTROL = UART_STATUS
+
+main:
+    ldx #$00
+loop:
+    lda string,x
+    sta UART_TX
+
+end:
+    wai
+    bra end
+
+
+
+string:
+    .asciiz "Hello, world!"
+
+
+.segment "VECTORS"
+
+.addr main
+.addr main
+.addr main