bootloader test dump

2024-11-23 16:56:29 +05:30
parent 5527f9e8b2
commit e2fa3ee864
11 changed files with 538 additions and 183 deletions
--- a/06_IO_Devices/04_SRAM/buffer.asm
+++ b/06_IO_Devices/04_SRAM/buffer.asm
@@ -5,3 +5,185 @@
 // the string to UART_TX
 //
 // Put your code here:
+// cat.asm
+//
+// load spi flash rom starting at address 0x040000 and write the
+// data to UART_TX
+//
+// Put your code here:
+
+// D=M -> 1111110000010000
+// M=D -> 1110001100001000
+// M=0 -> 1110101010001000
+
+// read data starting at address
+// 0x03 0x04 0x00 0x00
+    @3
+    D=A
+    @128
+    M=D
+    @4
+    D=A
+    @129
+    M=D
+    @130
+    M=0
+    @131
+    M=0
+
+// wake up from deep power down and wait 3us
+// 0xAB
+    @171
+    D=A
+    @SPI
+    M=D
+        @4
+        D=A
+        @COUNT
+        M=D
+        (DECR1)
+        @COUNT
+        DM=M-1
+        @DECR1
+        D;JGT
+    @511
+    D=A
+    @SPI
+    M=D
+        @21
+        D=A
+        @COUNT
+        M=D
+        (DECR2)
+        @COUNT
+        DM=M-1
+        @DECR2
+        D;JGT
+
+//command stack base address 
+    @128
+    D=A
+    @CHARREAD
+    M=D
+    @WRITECOUNT
+    M=0
+    @SENDCOUNT
+    M=0
+    @WAITREAD
+    0;JEQ
+
+(WAITREAD)
+    @SPI
+    D=M
+    @WAITREAD
+    D;JLT
+    @READ
+    0;JMP
+
+(READ)
+    // read
+    @CHARREAD
+    A=M
+    D=M
+    @SPI
+    M=D
+    @CHARREAD
+    M=M+1
+    @132
+    D=A
+    @CHARREAD
+    D=D-M
+    @WAITREAD
+    D;JGT
+    @ENDREAD
+    0;JMP
+
+(ENDREAD)
+    @WAITWRITE
+    0;JMP
+
+(WAITWRITE)
+    @SPI
+    D=M
+    @WAITWRITE
+    D;JLT
+    @WRITE
+    0;JMP
+
+(WRITE)
+    @SPI
+    M=0
+        @4
+        D=A
+        @COUNT
+        M=D
+        (FROMSPI)
+        @COUNT
+        DM=M-1
+        @FROMSPI
+        D;JGT
+    @WRITECOUNT
+    D=M
+    @SRAM_A
+    M=D
+    @SPI
+    D=M
+    @SRAM_D
+    M=D
+    @WRITECOUNT
+    M=M+1
+    @8
+    D=A
+    @WRITECOUNT
+    D=D-M
+    @ENDWRITE
+    D;JEQ
+    @WAITWRITE
+    0;JMP
+
+(ENDWRITE)
+    @WAITBOOT
+    0;JMP
+
+
+(WAITBOOT)
+    @UART_TX
+    D=M
+    @BOOT
+    D;JEQ
+    @WAITBOOT
+    0;JMP
+
+(BOOT)
+    @SENDCOUNT
+    D=M
+    @SRAM_A
+    M=D
+    @SRAM_D
+    D=M
+    @UART_TX
+    M=D
+    @SENDCOUNT
+    M=M+1
+    @8
+    D=A
+    @SENDCOUNT
+    D=D-M
+    @ENDBOOT
+    D;JEQ
+    @WAITBOOT
+    0;JMP
+
+(ENDBOOT)
+    @POLL
+    0;JMP
+
+
+// LED<->BUT loop
+(POLL)
+    @BUT
+    D=!M
+    @LED
+    M=D
+    @POLL
+    0;JMP