#include <ao.h>
-__xdata struct ao_fifo ao_usart1_rx_fifo;
-__xdata struct ao_fifo ao_usart1_tx_fifo;
-
void
ao_debug_out(char c)
{
stm_usart1.dr = c;
}
-void
-outbyte(char c)
-{
- putchar(c);
-}
-
-static __xdata uint8_t ao_serial_tx1_started;
-
static void
-ao_serial_tx1_start(void)
+_ao_usart_tx_start(struct ao_stm_usart *usart)
{
- if (!ao_fifo_empty(ao_usart1_tx_fifo) &&
- !ao_serial_tx1_started)
+ if (!ao_fifo_empty(usart->tx_fifo) && !usart->tx_started)
{
- ao_serial_tx1_started = 1;
- ao_fifo_remove(ao_usart1_tx_fifo, stm_usart1.dr);
+ usart->tx_started = 1;
+ ao_fifo_remove(usart->tx_fifo, usart->reg->dr);
}
}
-void stm_usart1_isr(void)
+static void
+ao_usart_isr(struct ao_stm_usart *usart, int stdin)
{
uint32_t sr;
- cli();
- sr = stm_usart1.sr;
- stm_usart1.sr = 0;
- sei();
+
+ sr = usart->reg->sr;
+ usart->reg->sr = 0;
+
if (sr & (1 << STM_USART_SR_RXNE)) {
- if (!ao_fifo_full(ao_usart1_rx_fifo))
- ao_fifo_insert(ao_usart1_rx_fifo, stm_usart1.dr);
- ao_wakeup(&ao_usart1_rx_fifo);
-#if USE_SERIAL_STDIN
- ao_wakeup(&ao_stdin_ready);
-#endif
+ char c = usart->reg->dr;
+ if (!ao_fifo_full(usart->rx_fifo))
+ ao_fifo_insert(usart->rx_fifo, c);
+ ao_wakeup(&usart->rx_fifo);
+ if (stdin)
+ ao_wakeup(&ao_stdin_ready);
}
- if (sr & (1 << STM_USART_SR_TXE)) {
- ao_serial_tx1_started = 0;
- ao_serial_tx1_start();
- ao_wakeup(&ao_usart1_tx_fifo);
+ if (sr & (1 << STM_USART_SR_TC)) {
+ usart->tx_started = 0;
+ _ao_usart_tx_start(usart);
+ ao_wakeup(&usart->tx_fifo);
}
}
char
-ao_serial_getchar(void) __critical
-{
- char c;
- cli();
- while (ao_fifo_empty(ao_usart1_rx_fifo))
- ao_sleep(&ao_usart1_rx_fifo);
- ao_fifo_remove(ao_usart1_rx_fifo, c);
- sei();
+ao_usart_getchar(struct ao_stm_usart *usart)
+{
+ char c;
+ ao_arch_block_interrupts();
+ while (ao_fifo_empty(usart->rx_fifo))
+ ao_sleep(&usart->rx_fifo);
+ ao_fifo_remove(usart->rx_fifo, c);
+ ao_arch_release_interrupts();
return c;
}
-#if USE_SERIAL_STDIN
-char
-ao_serial_pollchar(void) __critical
+int
+ao_usart_pollchar(struct ao_stm_usart *usart)
{
- char c;
- cli();
- if (ao_fifo_empty(ao_usart1_rx_fifo)) {
- sei();
- return AO_READ_AGAIN;
+ int c;
+
+ ao_arch_block_interrupts();
+ if (ao_fifo_empty(usart->rx_fifo))
+ c = AO_READ_AGAIN;
+ else {
+ uint8_t u;
+ ao_fifo_remove(usart->rx_fifo,u);
+ c = u;
}
- ao_fifo_remove(ao_usart1_rx_fifo,c);
- sei();
+ ao_arch_release_interrupts();
return c;
}
-#endif
void
-ao_serial_putchar(char c) __critical
+ao_usart_putchar(struct ao_stm_usart *usart, char c)
{
- cli();
- while (ao_fifo_full(ao_usart1_tx_fifo))
- ao_sleep(&ao_usart1_tx_fifo);
- ao_fifo_insert(ao_usart1_tx_fifo, c);
- ao_serial_tx1_start();
- sei();
+ 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);
+ ao_arch_release_interrupts();
}
void
-ao_serial_drain(void) __critical
+ao_usart_drain(struct ao_stm_usart *usart)
{
- cli();
- while (!ao_fifo_empty(ao_usart1_tx_fifo))
- ao_sleep(&ao_usart1_tx_fifo);
- sei();
-}
-
-int _write(int file, char *ptr, int len)
-{
- int l = len;
- while (l--)
- ao_debug_out(*ptr++);
- return len;
+ ao_arch_block_interrupts();
+ while (!ao_fifo_empty(usart->tx_fifo))
+ ao_sleep(&usart->tx_fifo);
+ ao_arch_release_interrupts();
}
static const struct {
uint32_t brr;
-} ao_serial_speeds[] = {
+} ao_usart_speeds[] = {
[AO_SERIAL_SPEED_4800] = {
- STM_APB1 / 4800
+ AO_PCLK1 / 4800
},
[AO_SERIAL_SPEED_9600] = {
- STM_APB1 / 9600
+ AO_PCLK1 / 9600
},
[AO_SERIAL_SPEED_19200] = {
- STM_APB1 / 19200
+ AO_PCLK1 / 19200
},
[AO_SERIAL_SPEED_57600] = {
- STM_APB1 / 57600
+ AO_PCLK1 / 57600
+ },
+ [AO_SERIAL_SPEED_115200] = {
+ AO_PCLK1 / 115200
},
};
void
-ao_serial_set_speed(uint8_t speed)
+ao_usart_set_speed(struct ao_stm_usart *usart, uint8_t speed)
{
-#if 0
- ao_serial_drain();
-#endif
- if (speed > AO_SERIAL_SPEED_57600)
+ if (speed > AO_SERIAL_SPEED_115200)
return;
- stm_usart1.brr = ao_serial_speeds[speed].brr;
+ usart->reg->brr = ao_usart_speeds[speed].brr;
}
void
-ao_serial_init(void)
+ao_usart_init(struct ao_stm_usart *usart)
{
- stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOAEN);
-
- stm_moder_set(&stm_gpioa, 9, STM_MODER_ALTERNATE);
- stm_moder_set(&stm_gpioa, 10, STM_MODER_ALTERNATE);
- stm_afr_set(&stm_gpioa, 9, STM_AFR_AF7);
- stm_afr_set(&stm_gpioa, 10, STM_AFR_AF7);
-
- /* Enable USART1 */
- stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_USART1EN);
-
- stm_usart1.cr1 = ((0 << STM_USART_CR1_OVER8) |
+ usart->reg->cr1 = ((0 << STM_USART_CR1_OVER8) |
(1 << STM_USART_CR1_UE) |
(0 << STM_USART_CR1_M) |
(0 << STM_USART_CR1_WAKE) |
(0 << STM_USART_CR1_PCE) |
(0 << STM_USART_CR1_PS) |
(0 << STM_USART_CR1_PEIE) |
- (1 << STM_USART_CR1_TXEIE) |
- (0 << STM_USART_CR1_TCIE) |
+ (0 << STM_USART_CR1_TXEIE) |
+ (1 << STM_USART_CR1_TCIE) |
(1 << STM_USART_CR1_RXNEIE) |
(0 << STM_USART_CR1_IDLEIE) |
(1 << STM_USART_CR1_TE) |
(0 << STM_USART_CR1_RWU) |
(0 << STM_USART_CR1_SBK));
- stm_usart1.cr2 = ((0 << STM_USART_CR2_LINEN) |
+ usart->reg->cr2 = ((0 << STM_USART_CR2_LINEN) |
(STM_USART_CR2_STOP_1 << STM_USART_CR2_STOP) |
(0 << STM_USART_CR2_CLKEN) |
(0 << STM_USART_CR2_CPOL) |
(0 << STM_USART_CR2_LBDL) |
(0 << STM_USART_CR2_ADD));
- stm_usart1.cr3 = ((0 << STM_USART_CR3_ONEBITE) |
+ usart->reg->cr3 = ((0 << STM_USART_CR3_ONEBITE) |
(0 << STM_USART_CR3_CTSIE) |
(0 << STM_USART_CR3_CTSE) |
(0 << STM_USART_CR3_RTSE) |
(0 << STM_USART_CR3_EIE));
/* Pick a 9600 baud rate */
- ao_serial_set_speed(AO_SERIAL_SPEED_9600);
+ ao_usart_set_speed(usart, AO_SERIAL_SPEED_9600);
+}
- printf ("serial initialized\n");
-#if 0
-#if USE_SERIAL_STDIN
- ao_add_stdio(ao_serial_pollchar,
- ao_serial_putchar,
- NULL);
+#if HAS_SERIAL_1
+
+struct ao_stm_usart ao_stm_usart1;
+
+void stm_usart1_isr(void) { ao_usart_isr(&ao_stm_usart1, USE_SERIAL_1_STDIN); }
+
+char
+ao_serial1_getchar(void)
+{
+ return ao_usart_getchar(&ao_stm_usart1);
+}
+
+void
+ao_serial1_putchar(char c)
+{
+ ao_usart_putchar(&ao_stm_usart1, c);
+}
+
+int
+ao_serial1_pollchar(void)
+{
+ return ao_usart_pollchar(&ao_stm_usart1);
+}
+
+void
+ao_serial1_set_speed(uint8_t speed)
+{
+ ao_usart_set_speed(&ao_stm_usart1, speed);
+}
+#endif /* HAS_SERIAL_1 */
+
+#if HAS_SERIAL_2
+
+struct ao_stm_usart ao_stm_usart2;
+
+void stm_usart2_isr(void) { ao_usart_isr(&ao_stm_usart2, USE_SERIAL_2_STDIN); }
+
+char
+ao_serial2_getchar(void)
+{
+ return ao_usart_getchar(&ao_stm_usart2);
+}
+
+void
+ao_serial2_putchar(char c)
+{
+ ao_usart_putchar(&ao_stm_usart2, c);
+}
+
+int
+ao_serial2_pollchar(void)
+{
+ return ao_usart_pollchar(&ao_stm_usart2);
+}
+
+void
+ao_serial2_set_speed(uint8_t speed)
+{
+ ao_usart_set_speed(&ao_stm_usart2, speed);
+}
+#endif /* HAS_SERIAL_2 */
+
+#if HAS_SERIAL_3
+
+struct ao_stm_usart ao_stm_usart3;
+
+void stm_usart3_isr(void) { ao_usart_isr(&ao_stm_usart3, USE_SERIAL_2_STDIN); }
+
+char
+ao_serial3_getchar(void)
+{
+ return ao_usart_getchar(&ao_stm_usart3);
+}
+
+void
+ao_serial3_putchar(char c)
+{
+ ao_usart_putchar(&ao_stm_usart3, c);
+}
+
+int
+ao_serial3_pollchar(void)
+{
+ return ao_usart_pollchar(&ao_stm_usart3);
+}
+
+void
+ao_serial3_set_speed(uint8_t speed)
+{
+ ao_usart_set_speed(&ao_stm_usart3, speed);
+}
+#endif /* HAS_SERIAL_3 */
+
+void
+ao_serial_init(void)
+{
+#if HAS_SERIAL_1
+ /*
+ * TX RX
+ * PA9 PA10
+ * PB6 PB7 *
+ */
+
+#if SERIAL_1_PA9_PA10
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOAEN);
+
+ stm_afr_set(&stm_gpioa, 9, STM_AFR_AF7);
+ stm_afr_set(&stm_gpioa, 10, STM_AFR_AF7);
+#else
+#if SERIAL_1_PB6_PB7
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOBEN);
+
+ stm_afr_set(&stm_gpiob, 6, STM_AFR_AF7);
+ stm_afr_set(&stm_gpiob, 7, STM_AFR_AF7);
+#else
+#error "No SERIAL_1 port configuration specified"
#endif
#endif
+ /* Enable USART */
+ stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_USART1EN);
+
+ ao_stm_usart1.reg = &stm_usart1;
+ ao_usart_init(&ao_stm_usart1);
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_serial1_putchar,
+ NULL);
+#endif
+#endif
+
+#if HAS_SERIAL_2
+ /*
+ * TX RX
+ * PA2 PA3
+ * PD5 PD6
+ */
+
+#if SERIAL_2_PA2_PA3
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOAEN);
+
+ stm_afr_set(&stm_gpioa, 2, STM_AFR_AF7);
+ stm_afr_set(&stm_gpioa, 3, STM_AFR_AF7);
+#else
+#if SERIAL_2_PD5_PD6
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIODEN);
+
+ stm_afr_set(&stm_gpiod, 5, STM_AFR_AF7);
+ stm_afr_set(&stm_gpiod, 6, STM_AFR_AF7);
+#else
+#error "No SERIAL_2 port configuration specified"
+#endif
+#endif
+ /* Enable USART */
+ stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_USART2EN);
+
+ ao_stm_usart2.reg = &stm_usart2;
+ ao_usart_init(&ao_stm_usart2);
+
+ 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_serial2_putchar,
+ NULL);
+#endif
+#endif
+
+#if HAS_SERIAL_3
+ /*
+ * TX RX
+ * PB10 PB11
+ * PC10 PC11
+ * PD8 PD9
+ */
+#if SERIAL_3_PB10_PB11
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOBEN);
+
+ stm_afr_set(&stm_gpiob, 10, STM_AFR_AF7);
+ stm_afr_set(&stm_gpiob, 11, STM_AFR_AF7);
+#else
+#if SERIAL_3_PC10_PC11
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOCEN);
+
+ stm_afr_set(&stm_gpioc, 10, STM_AFR_AF7);
+ stm_afr_set(&stm_gpioc, 11, STM_AFR_AF7);
+#else
+#if SERIAL_3_PD8_PD9
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIODEN);
+
+ stm_afr_set(&stm_gpiod, 8, STM_AFR_AF7);
+ stm_afr_set(&stm_gpiod, 9, STM_AFR_AF7);
+#else
+#error "No SERIAL_3 port configuration specified"
+#endif
+#endif
+#endif
+ /* Enable USART */
+ stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_USART3EN);
+
+ ao_stm_usart3.reg = &stm_usart3;
+ ao_usart_init(&ao_stm_usart3);
+
+ 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_serial3_putchar,
+ NULL);
+#endif
+#endif
}
+
+
projects / fw / altos / blobdiff