From a6d2a2166560476c9a92473e248cca177743303e Mon Sep 17 00:00:00 2001
From: Rahix <rahix@rahix.de>
Date: Wed, 17 Jul 2019 19:30:51 +0200
Subject: [PATCH] fix(pycardium): Properly print line-endings for serial
Signed-off-by: Rahix <rahix@rahix.de>
---
pycardium/mphalport.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/pycardium/mphalport.c b/pycardium/mphalport.c
index b8ae7ec3..fdfb592d 100644
--- a/pycardium/mphalport.c
+++ b/pycardium/mphalport.c
@@ -44,7 +44,21 @@ int DEBUG_printf(const char *fmt, ...)
/* newlib syscall to allow printf to work */
long _write(int fd, const char *buf, size_t cnt)
{
- epic_uart_write_str(buf, cnt);
+ /*
+ * Only print one line at a time. Insert `\r` between lines so
+ * they are properly displayed on the serial console.
+ */
+ size_t i, last = 0;
+ for (i = 0; i < cnt; i++) {
+ if (buf[i] == '\n') {
+ epic_uart_write_str(&buf[last], i - last);
+ epic_uart_write_str("\r", 1);
+ last = i;
+ }
+ }
+ if (last != i) {
+ epic_uart_write_str(&buf[last], cnt - last);
+ }
return cnt;
}
--
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