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| author | Chris Johns <chrisj@rtems.org> | 2016-11-25 09:45:35 +1100 |
|---|---|---|
| committer | Chris Johns <chrisj@rtems.org> | 2016-11-29 08:50:40 +1100 |
| commit | 8fd465e67e5db00839e7b3a717a816d57b46f198 (patch) | |
| tree | 6a513d7e9fce8c3a300c2b0860ad9ec6e5ef1275 /c/src/lib/libbsp/arm/xilinx-zynq/console/zynq-uart.c | |
| parent | sparc: Optimize _ISR_Handler() (diff) | |
| download | rtems-8fd465e67e5db00839e7b3a717a816d57b46f198.tar.bz2 | |
arm/zynq: Wait for the UART TX FIFO to empty on reset.
Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libbsp/arm/xilinx-zynq/console/zynq-uart.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/xilinx-zynq/console/zynq-uart.c b/c/src/lib/libbsp/arm/xilinx-zynq/console/zynq-uart.c index aa96eba375..f9a1cf91d5 100644 --- a/c/src/lib/libbsp/arm/xilinx-zynq/console/zynq-uart.c +++ b/c/src/lib/libbsp/arm/xilinx-zynq/console/zynq-uart.c @@ -226,3 +226,16 @@ const console_fns zynq_uart_fns = { .deviceSetAttributes = zynq_uart_set_attribues, .deviceOutputUsesInterrupts = false }; + +void zynq_uart_reset_tx_flush(int minor) +{ + volatile zynq_uart *regs = zynq_uart_get_regs(minor); + int c = 4; + + while (c-- > 0) + zynq_uart_write_polled(minor, '\r'); + + while ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_TEMPTY) == 0) { + /* Wait */ + } +} |