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cdc/serial: disable tdre polling

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This commit is contained in:
Zack Buhman 2025-08-08 15:45:39 -05:00
parent e9ef21865c
commit 9f758e75f0
1 changed files with 3 additions and 3 deletions
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6
cdc/serial.c
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@ -4,14 +4,14 @@
void serial_char(const char c) void serial_char(const char c)
{ {
while ((sh2.reg.SSR & SSR__TDRE) == 0); // wait for transmit data empty //while ((sh2.reg.SSR & SSR__TDRE) == 0); // wait for transmit data empty
sh2.reg.TDR = c; sh2.reg.TDR = c;
} }
void serial_string(const char * s) void serial_string(const char * s)
{ {
while (*s) { while (*s) {
while ((sh2.reg.SSR & SSR__TDRE) == 0); // wait for transmit data empty //while ((sh2.reg.SSR & SSR__TDRE) == 0); // wait for transmit data empty
sh2.reg.TDR = *s++; sh2.reg.TDR = *s++;
} }
} }
@ -19,7 +19,7 @@ void serial_string(const char * s)
void serial_bytes(const char * s, uint32_t length) void serial_bytes(const char * s, uint32_t length)
{ {
while (length > 0) { while (length > 0) {
while ((sh2.reg.SSR & SSR__TDRE) == 0); // wait for transmit data empty //while ((sh2.reg.SSR & SSR__TDRE) == 0); // wait for transmit data empty
sh2.reg.TDR = *s++; sh2.reg.TDR = *s++;
length -= 1; length -= 1;
} }