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| 1 | .include "memorymap/uart.s" | |
| 2 | ||
| 3 | .align 2 | |
| 4 | .arm | |
| 5 | .global io_uart_dataready | |
| 6 | #Check if a UART has data available. | |
| 7 | #Parameters: r0=base address of the UART to check | |
| 8 | #Sets r0 to nonzero if data is ready. | |
| 9 | io_uart_dataready: | |
| 10 | - | ldr r1, [r0, UART.LSR] |
| 10 | + | ldr r1, [r0, #UART.LSR] |
| 11 | ldr r2, =0x7FFFFFFFFF | |
| 12 | and r0, r1, r2 | |
| 13 | bx lr |
