altos/stm32l: Add support for software-driven HW flow control

[fw/altos] / src / stm / ao_arch_funcs.h

diff --git a/src/stm/ao_arch_funcs.h b/src/stm/ao_arch_funcs.h
index 087e00d91da77d13075a80fa98c9234884a04a02..5a7782dea8913779c8aa01cb37eb93cdec8387bc 100644 (file)
--- a/src/stm/ao_arch_funcs.h
+++ b/src/stm/ao_arch_funcs.h
@@ -177,6 +177,11 @@ ao_spi_try_get_mask(struct stm_gpio *reg, uint16_t mask, uint8_t bus, uint32_t s
 
 #define ao_gpio_get(port, bit, pin) stm_gpio_get(port, bit)
 
+#define ao_gpio_set_bits(port, bits) stm_gpio_set_bits(port, bits)
+
+#define ao_gpio_clr_bits(port, bits) stm_gpio_clr_bits(port, bits);
+
+
 #define ao_enable_output(port,bit,pin,v) do {                  \
                ao_enable_port(port);                           \
                ao_gpio_set(port, bit, pin, v);                 \
@@ -273,12 +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