diff options
| author | Keith Packard <keithp@keithp.com> | 2012-11-30 16:01:07 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2012-11-30 16:01:07 -0800 |
| commit | 0b65402361f36a0c722977bcb63edb26fda0db28 (patch) | |
| tree | 435d23c147829f11aac67fd6c30c74dd96f76e8e /src/stm/ao_arch_funcs.h | |
| parent | 0fa9ce23dd63846337872d6d666a469512614d07 (diff) | |
altos: Make stdio 8-bit clean by making pollchar return int
We were stealing one value (0xff) in the return value from pollchar to
indicate 'not ready yet'. Instead of doing that, use the integer value
-1 and have pollchar return an int instead of a char. That
necessitated cleaning a few other bits to make sure that 0xff wouldn't
get promoted to -1 on accident.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/stm/ao_arch_funcs.h')
| -rw-r--r-- | src/stm/ao_arch_funcs.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/stm/ao_arch_funcs.h b/src/stm/ao_arch_funcs.h index d6ab1465..87bbe73e 100644 --- a/src/stm/ao_arch_funcs.h +++ b/src/stm/ao_arch_funcs.h @@ -210,6 +210,26 @@ ao_i2c_recv(void *block, uint16_t len, uint8_t i2c_index, uint8_t stop); void ao_i2c_init(void); +/* ao_serial_stm.c */ +struct ao_stm_usart { + struct ao_fifo rx_fifo; + struct ao_fifo tx_fifo; + struct stm_usart *reg; + uint8_t tx_started; +}; + +#if HAS_SERIAL_1 +extern struct ao_stm_usart ao_stm_usart1; +#endif + +#if HAS_SERIAL_2 +extern struct ao_stm_usart ao_stm_usart2; +#endif + +#if HAS_SERIAL_3 +extern struct ao_stm_usart ao_stm_usart3; +#endif + #define ARM_PUSH32(stack, val) (*(--(stack)) = (val)) static inline uint32_t |