Вывод блока памяти данных¶

Для платы HW-MCP04:

.alias DM_START        0x00000000 ;start address DM for output by uart0
.alias BLOCK_SIZE    0x00000100 ;end address DM for output by uart0
.alias iterator1 2
.alias iterator2 3
.alias iterator3 4
.alias byte_DM 5

.alias UART_DATA    UART0_DATA
.alias UART_BDR     UART0_BDR
.alias UART_ST      UART0_ST
.alias UART_CR      UART0_CR

.alias UART_PORT_PIN  0x300
.alias UART_PORT_BPS  GPIOB_BPS

.text

;config uart
initUART:
    jmp read_DM
    getl 0x00000300
    wrl @1, GPIOD_BPS
    getl 0x00000104
    wrl @1, UART_BDR
    getl 0x00000003
    wrl @1, UART_CR
    setl #iterator1, 0x00000000
    setl #iterator3, 4 ; send to uart0 fifo 32 bytes
complete

; read DM for define address as double word (64 bits)
read_DM:
    getl BLOCK_SIZE
    subl @1, #iterator1
    je @1, stop2
    jne @2, out_DM
    getl #iterator1
    addl @1, DM_START
    rdq @1
    setq #byte_DM, @1
    addl @4, 0x00000008
    setl #iterator1, @1
    setl #iterator2, 0
    getl #iterator3
    subl @1, 1
    setl #iterator3, @1
complete

out_DM:
    getl #iterator2
    getl 56 ; write to tx fifo 8 bytes
    subl @1, @2
    je @1, full_FIFO
    jne @2, out_DM
    getq #byte_DM
    slrq @1, #iterator2 
    wrq @1, UART_DATA ; write to tx fifo only one byte
    getl 8 
    addl @1, #iterator2
    setl #iterator2, @1
complete

; analyze iterator3 for sending all 4*8 bytes
full_FIFO:
    getl #iterator3
    getl 0xFFFFFFFF
    and @1, @2
    je @1, buf_TXD
    jne @2, read_DM
complete

; wait for fifo transmitter is empty
buf_TXD:
    rdl UART_ST
    getl 0x00000004
    and @1, @2
    je @1, buf_TXD
    jne @2, read_DM
    setl #iterator3, 4
complete

; enable led 2,3
stop2:
    getl 0x1000
complete