ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index);
void
-ao_spi_send_sync(void *block, uint16_t len, uint8_t spi_index);
+ao_spi_send_sync(const void *block, uint16_t len, uint8_t spi_index);
+
+void
+ao_spi_start_bytes(uint8_t spi_index);
+
+void
+ao_spi_stop_bytes(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;
+ }
+
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE)))
+ ;
+ stm_spi->dr = byte;
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_RXNE)))
+ ;
+ (void) stm_spi->dr;
+}
+
+static inline uint8_t
+ao_spi_recv_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;
+ }
+
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE)))
+ ;
+ stm_spi->dr = 0xff;
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_RXNE)))
+ ;
+ return stm_spi->dr;
+}
void
ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
ao_i2c_init(void);
/* ao_serial_stm.c */
+
+#if USE_SERIAL_1_FLOW && USE_SERIAL_1_SW_FLOW || USE_SERIAL_2_FLOW && USE_SERIAL_2_SW_FLOW
+#define HAS_SERIAL_SW_FLOW 1
+#else
+#define HAS_SERIAL_SW_FLOW 0
+#endif
+
+#if USE_SERIAL_2_FLOW && !USE_SERIAL_2_SW_FLOW
+#define USE_SERIAL_2_HW_FLOW 1
+#endif
+
+#if USE_SERIAL_1_FLOW && !USE_SERIAL_1_SW_FLOW
+#define USE_SERIAL_1_HW_FLOW 1
+#endif
+
+#if USE_SERIAL_1_HW_FLOW || USE_SERIAL_2_HW_FLOW
+#define HAS_SERIAL_HW_FLOW 1
+#else
+#define HAS_SERIAL_HW_FLOW 0
+#endif
+
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
static inline void
ao_arch_init_stack(struct ao_task *task, void *start)
{
- uint32_t *sp = (uint32_t *) (task->stack + AO_STACK_SIZE);
+ uint32_t *sp = (uint32_t *) ((void *) task->stack + AO_STACK_SIZE);
uint32_t a = (uint32_t) start;
int i;