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LEON3: added TX-wait-complete and CR on NL support for UART

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Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
This commit is contained in:
Daniel Hellstrom
2012-04-19 15:21:25 +02:00
committed by Gedare Bloom
parent 605b4b649d
commit 5d48037f83
2 changed files with 23 additions and 6 deletions
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7
c/src/lib/libbsp/sparc/leon3/console/console.c
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@@ -50,9 +50,12 @@ int syscon_uart_index __attribute__((weak)) = 0;
extern void apbuart_outbyte_polled( extern void apbuart_outbyte_polled(
ambapp_apb_uart *regs, ambapp_apb_uart *regs,
char ch unsigned char ch,
int do_cr_on_newline,
int wait_sent
); );
/* body is in debugputs.c */ /* body is in debugputs.c */
/* /*
@@ -156,7 +159,7 @@ ssize_t console_write_polled(int minor, const char *buf, size_t len)
port = minor - 1; port = minor - 1;
while (nwrite < len) { while (nwrite < len) {
apbuart_outbyte_polled(apbuarts[port].regs, *buf++); apbuart_outbyte_polled(apbuarts[port].regs, *buf++, 1, 0);
nwrite++; nwrite++;
} }
return nwrite; return nwrite;

18
c/src/lib/libbsp/sparc/leon3/console/debugputs.c
View File

@@ -89,9 +89,12 @@ int bsp_debug_uart_init(void)
*/ */
void apbuart_outbyte_polled( void apbuart_outbyte_polled(
ambapp_apb_uart *regs, ambapp_apb_uart *regs,
unsigned char ch unsigned char ch,
int do_cr_on_newline,
int wait_sent
) )
{ {
send:
while ( (regs->status & LEON_REG_UART_STATUS_THE) == 0 ) { while ( (regs->status & LEON_REG_UART_STATUS_THE) == 0 ) {
/* Lower bus utilization while waiting for UART */ /* Lower bus utilization while waiting for UART */
asm volatile ("nop"::); asm volatile ("nop"::); asm volatile ("nop"::); asm volatile ("nop"::);
@@ -100,6 +103,17 @@ void apbuart_outbyte_polled(
asm volatile ("nop"::); asm volatile ("nop"::); asm volatile ("nop"::); asm volatile ("nop"::);
} }
regs->data = (unsigned int) ch; regs->data = (unsigned int) ch;
if ((ch == '\n') && do_cr_on_newline) {
ch = '\r';
goto send;
}
/* Wait until the character has been sent? */
if (wait_sent) {
while ((regs->status & LEON_REG_UART_STATUS_THE) == 0)
;
}
} }
/* /*
@@ -129,7 +143,7 @@ static void bsp_out_char(char c)
return; return;
} }
apbuart_outbyte_polled(dbg_uart, c); apbuart_outbyte_polled(dbg_uart, c, 1, 1);
} }
/* /*