void
ao_spi_send_sync(void *block, uint16_t len, uint8_t spi_index);
+static inline void
+ao_spi_send_byte(uint8_t byte, uint8_t spi_index)
+{
+ struct stm_spi *stm_spi;
+
+ switch (AO_SPI_INDEX(spi_index)) {
+ case 0:
+ stm_spi = &stm_spi1;
+ break;
+ case 1:
+ stm_spi = &stm_spi2;
+ break;
+ }
+
+ stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
+ (0 << STM_SPI_CR2_RXNEIE) |
+ (0 << STM_SPI_CR2_ERRIE) |
+ (0 << STM_SPI_CR2_SSOE) |
+ (0 << STM_SPI_CR2_TXDMAEN) |
+ (0 << STM_SPI_CR2_RXDMAEN));
+
+ /* Clear RXNE */
+ (void) stm_spi->dr;
+
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE)));
+ stm_spi->dr = byte;
+}
+
void
ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
#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); \
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