diff options
| author | Keith Packard <keithp@keithp.com> | 2016-04-25 18:48:47 -0400 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2016-04-25 18:48:47 -0400 |
| commit | 27319e4edbc503f193475b437fa5fe2937d47cbe (patch) | |
| tree | ec123c1035b007a3dcc64518ff9bb92ede2ebcff /src/stm/ao_arch_funcs.h | |
| parent | 7c9a111ac1c88467ce28e03b4a9d3eabc9d7015b (diff) | |
altos/stm32l: Add support for software-driven HW flow control
This allows applications to request that the flow control bits be
driven from software rather than hardware, permitting more flexible
pin configuration.
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 | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/stm/ao_arch_funcs.h b/src/stm/ao_arch_funcs.h index 6fcfd5f8..5a7782de 100644 --- a/src/stm/ao_arch_funcs.h +++ b/src/stm/ao_arch_funcs.h @@ -278,14 +278,35 @@ ao_i2c_recv(void *block, uint16_t len, uint8_t i2c_index, uint8_t stop); void ao_i2c_init(void); +#if USE_SERIAL_1_SW_FLOW || USE_SERIAL_2_SW_FLOW || USE_SERIAL_3_SW_FLOW +#define HAS_SERIAL_SW_FLOW 1 +#else +#define HAS_SERIAL_SW_FLOW 0 +#endif + +#if USE_SERIAL_1_FLOW && !USE_SERIAL_1_SW_FLOW || USE_SERIAL_2_FLOW && !USE_SERIAL_2_SW_FLOW || USE_SERIAL_3_FLOW && !USE_SERIAL_3_SW_FLOW +#define HAS_SERIAL_HW_FLOW 1 +#else +#define HAS_SERIAL_HW_FLOW 0 +#endif + /* 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; uint8_t tx_running; uint8_t draining; +#if HAS_SERIAL_SW_FLOW + /* RTS - 0 if we have FIFO space, 1 if not + * CTS - 0 if we can send, 0 if not + */ + struct stm_gpio *gpio_rts; + struct stm_gpio *gpio_cts; + uint8_t pin_rts; + uint8_t pin_cts; + uint8_t rts; +#endif }; #if HAS_SERIAL_1 |