#include <ao.h>
-struct ao_stm_usart {
- struct ao_fifo rx_fifo;
- struct ao_fifo tx_fifo;
- struct stm_usart *reg;
- uint8_t tx_started;
-};
-
void
ao_debug_out(char c)
{
}
static void
-ao_usart_tx_start(struct ao_stm_usart *usart)
+_ao_usart_tx_start(struct ao_stm_usart *usart)
{
if (!ao_fifo_empty(usart->tx_fifo) && !usart->tx_started)
{
}
if (sr & (1 << STM_USART_SR_TC)) {
usart->tx_started = 0;
- ao_usart_tx_start(usart);
+ _ao_usart_tx_start(usart);
ao_wakeup(&usart->tx_fifo);
}
}
-char
-ao_usart_getchar(struct ao_stm_usart *usart)
+int
+_ao_usart_pollchar(struct ao_stm_usart *usart)
{
- char c;
- cli();
- while (ao_fifo_empty(usart->rx_fifo))
- ao_sleep(&usart->rx_fifo);
- ao_fifo_remove(usart->rx_fifo, c);
- sei();
+ int c;
+
+ if (ao_fifo_empty(usart->rx_fifo))
+ c = AO_READ_AGAIN;
+ else {
+ uint8_t u;
+ ao_fifo_remove(usart->rx_fifo,u);
+ c = u;
+ }
return c;
}
char
-ao_usart_pollchar(struct ao_stm_usart *usart)
+ao_usart_getchar(struct ao_stm_usart *usart)
{
- char c;
- cli();
- if (ao_fifo_empty(usart->rx_fifo)) {
- sei();
- return AO_READ_AGAIN;
- }
- ao_fifo_remove(usart->rx_fifo,c);
- sei();
- return c;
+ int c;
+ ao_arch_block_interrupts();
+ while ((c = _ao_usart_pollchar(usart)) == AO_READ_AGAIN)
+ ao_sleep(&usart->rx_fifo);
+ ao_arch_release_interrupts();
+ return (char) c;
}
void
ao_usart_putchar(struct ao_stm_usart *usart, char c)
{
- cli();
+ ao_arch_block_interrupts();
while (ao_fifo_full(usart->tx_fifo))
ao_sleep(&usart->tx_fifo);
ao_fifo_insert(usart->tx_fifo, c);
- ao_usart_tx_start(usart);
- sei();
+ _ao_usart_tx_start(usart);
+ ao_arch_release_interrupts();
}
void
ao_usart_drain(struct ao_stm_usart *usart)
{
- cli();
+ ao_arch_block_interrupts();
while (!ao_fifo_empty(usart->tx_fifo))
ao_sleep(&usart->tx_fifo);
- sei();
+ ao_arch_release_interrupts();
}
static const struct {
[AO_SERIAL_SPEED_57600] = {
AO_PCLK1 / 57600
},
+ [AO_SERIAL_SPEED_115200] = {
+ AO_PCLK1 / 115200
+ },
};
void
ao_usart_set_speed(struct ao_stm_usart *usart, uint8_t speed)
{
- if (speed > AO_SERIAL_SPEED_57600)
+ if (speed > AO_SERIAL_SPEED_115200)
return;
usart->reg->brr = ao_usart_speeds[speed].brr;
}
ao_usart_putchar(&ao_stm_usart1, c);
}
-char
-ao_serial1_pollchar(void)
+int
+_ao_serial1_pollchar(void)
{
- return ao_usart_pollchar(&ao_stm_usart1);
+ return _ao_usart_pollchar(&ao_stm_usart1);
}
void
ao_usart_putchar(&ao_stm_usart2, c);
}
-char
-ao_serial2_pollchar(void)
+int
+_ao_serial2_pollchar(void)
{
- return ao_usart_pollchar(&ao_stm_usart2);
+ return _ao_usart_pollchar(&ao_stm_usart2);
}
void
struct ao_stm_usart ao_stm_usart3;
-void stm_usart3_isr(void) { ao_usart_isr(&ao_stm_usart3, USE_SERIAL_3_STDIN); }
+void stm_usart3_isr(void) { ao_usart_isr(&ao_stm_usart3, USE_SERIAL_2_STDIN); }
char
ao_serial3_getchar(void)
ao_usart_putchar(&ao_stm_usart3, c);
}
-char
-ao_serial3_pollchar(void)
+int
+_ao_serial3_pollchar(void)
{
- return ao_usart_pollchar(&ao_stm_usart3);
+ return _ao_usart_pollchar(&ao_stm_usart3);
}
void
stm_nvic_set_enable(STM_ISR_USART1_POS);
stm_nvic_set_priority(STM_ISR_USART1_POS, 4);
#if USE_SERIAL_1_STDIN
- ao_add_stdio(ao_serial1_pollchar,
+ ao_add_stdio(_ao_serial1_pollchar,
ao_serial1_putchar,
NULL);
#endif
stm_nvic_set_enable(STM_ISR_USART2_POS);
stm_nvic_set_priority(STM_ISR_USART2_POS, 4);
#if USE_SERIAL_2_STDIN
- ao_add_stdio(ao_serial2_pollchar,
+ ao_add_stdio(_ao_serial2_pollchar,
ao_serial2_putchar,
NULL);
#endif
stm_nvic_set_enable(STM_ISR_USART3_POS);
stm_nvic_set_priority(STM_ISR_USART3_POS, 4);
#if USE_SERIAL_3_STDIN
- ao_add_stdio(ao_serial3_pollchar,
+ ao_add_stdio(_ao_serial3_pollchar,
ao_serial3_putchar,
NULL);
#endif