X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fsamd21%2Fao_serial_samd21.c;h=504dd49055f57869136279c2e4a186e592130a7a;hb=c035f20392828c60da75d092eea4d64736316c7b;hp=a52966c1249ba39dc1b29c98b4f6fcfb2bdb3d2f;hpb=c59892cd337162c63e5d7ba8e8eec779d201022d;p=fw%2Faltos diff --git a/src/samd21/ao_serial_samd21.c b/src/samd21/ao_serial_samd21.c index a52966c1..504dd490 100644 --- a/src/samd21/ao_serial_samd21.c +++ b/src/samd21/ao_serial_samd21.c @@ -17,7 +17,7 @@ static int _ao_usart_tx_start(struct ao_samd21_usart *usart) { - if (!ao_fifo_empty(&usart->tx_fifo)) { + if (!ao_fifo_empty(usart->tx_fifo)) { #if HAS_SERIAL_SW_FLOW if (usart->gpio_cts && ao_gpio_get(usart->gpio_cts, usart->pin_cts, foo) == 1) { ao_exti_enable(usart->gpio_cts, usart->pin_cts); @@ -28,7 +28,7 @@ _ao_usart_tx_start(struct ao_samd21_usart *usart) { usart->tx_running = 1; usart->reg->intenset = (1 << SAMD21_SERCOM_INTFLAG_DRE) | (1 << SAMD21_SERCOM_INTFLAG_TXC); - usart->reg->data = ao_fifo_remove(&usart->tx_fifo); + ao_fifo_remove(usart->tx_fifo, usart->reg->data); ao_wakeup(&usart->tx_fifo); return 1; } @@ -40,8 +40,8 @@ static void _ao_usart_rx(struct ao_samd21_usart *usart, int is_stdin) { if (usart->reg->intflag & (1 << SAMD21_SERCOM_INTFLAG_RXC)) { - if (!ao_fifo_full(&usart->rx_fifo)) { - ao_fifo_insert(&usart->rx_fifo, usart->reg->data); + if (!ao_fifo_full(usart->rx_fifo)) { + ao_fifo_insert(usart->rx_fifo, usart->reg->data); ao_wakeup(&usart->rx_fifo); if (is_stdin) ao_wakeup(&ao_stdin_ready); @@ -89,14 +89,26 @@ static const uint32_t ao_usart_speeds[] = { static void ao_usart_set_speed(struct ao_samd21_usart *usart, uint8_t speed) { + struct samd21_sercom *reg = usart->reg; uint64_t top = (uint64_t) ao_usart_speeds[speed] << (4 + 16); - uint16_t baud = 65536 - (top + AO_SYSCLK/2) / AO_SYSCLK; + uint16_t baud = (uint16_t) (65536 - (top + AO_SYSCLK/2) / AO_SYSCLK); + uint32_t ctrla = reg->ctrla; + if (ctrla & (1UL << SAMD21_SERCOM_CTRLA_ENABLE)) { + usart->reg->ctrla = ctrla & ~(1UL << SAMD21_SERCOM_CTRLA_ENABLE); + while (reg->syncbusy & (1 << SAMD21_SERCOM_SYNCBUSY_ENABLE)) + ; + } usart->reg->baud = baud; + if (ctrla & (1UL << SAMD21_SERCOM_CTRLA_ENABLE)) { + usart->reg->ctrla = ctrla; + while (reg->syncbusy & (1 << SAMD21_SERCOM_SYNCBUSY_ENABLE)) + ; + } } static void -ao_usart_init(struct ao_samd21_usart *usart, int hw_flow, int id) +ao_usart_init(struct ao_samd21_usart *usart, bool hw_flow, uint8_t id, uint8_t txpo, uint8_t rxpo) { struct samd21_sercom *reg = usart->reg; @@ -137,14 +149,17 @@ ao_usart_init(struct ao_samd21_usart *usart, int hw_flow, int id) (1 << SAMD21_SERCOM_CTRLA_RUNSTDBY) | (0 << SAMD21_SERCOM_CTRLA_IBON) | (0 << SAMD21_SERCOM_CTRLA_SAMPR) | - (1 << SAMD21_SERCOM_CTRLA_TXPO) | /* pad[2] */ - (3 << SAMD21_SERCOM_CTRLA_RXPO) | /* pad[3] */ + (txpo << SAMD21_SERCOM_CTRLA_TXPO) | /* pad[2] */ + (rxpo << SAMD21_SERCOM_CTRLA_RXPO) | /* pad[3] */ (0 << SAMD21_SERCOM_CTRLA_SAMPA) | (0 << SAMD21_SERCOM_CTRLA_FORM) | /* no parity */ (0 << SAMD21_SERCOM_CTRLA_CMODE) | /* async */ (0 << SAMD21_SERCOM_CTRLA_CPOL) | (1 << SAMD21_SERCOM_CTRLA_DORD)); /* LSB first */ + while (reg->syncbusy & (1 << SAMD21_SERCOM_SYNCBUSY_ENABLE)) + ; + /* Enable receive interrupt */ reg->intenset = (1 << SAMD21_SERCOM_INTFLAG_RXC); } @@ -154,13 +169,13 @@ _ao_usart_pollchar(struct ao_samd21_usart *usart) { int c; - if (ao_fifo_empty(&usart->rx_fifo)) + if (ao_fifo_empty(usart->rx_fifo)) c = AO_READ_AGAIN; else { uint8_t u; - u = ao_fifo_remove(&usart->rx_fifo); + ao_fifo_remove(usart->rx_fifo, u); if ((usart->reg->intenset & (1 << SAMD21_SERCOM_INTFLAG_RXC)) == 0) { - if (ao_fifo_barely(&usart->rx_fifo)) + if (ao_fifo_barely(usart->rx_fifo)) usart->reg->intenset = (1 << SAMD21_SERCOM_INTFLAG_RXC); } #if HAS_SERIAL_SW_FLOW @@ -190,9 +205,9 @@ static void ao_usart_putchar(struct ao_samd21_usart *usart, char c) { ao_arch_block_interrupts(); - while (ao_fifo_full(&usart->tx_fifo)) + while (ao_fifo_full(usart->tx_fifo)) ao_sleep(&usart->tx_fifo); - ao_fifo_insert(&usart->tx_fifo, c); + ao_fifo_insert(usart->tx_fifo, c); _ao_usart_tx_start(usart); ao_arch_release_interrupts(); } @@ -201,7 +216,7 @@ static void ao_usart_drain(struct ao_samd21_usart *usart) { ao_arch_block_interrupts(); - while (!ao_fifo_empty(&usart->tx_fifo) || usart->tx_running) { + while (!ao_fifo_empty(usart->tx_fifo) || usart->tx_running) { usart->draining = 1; ao_sleep(&usart->tx_fifo); } @@ -246,9 +261,48 @@ ao_serial0_set_speed(uint8_t speed) } #endif /* HAS_SERIAL_0 */ +#if HAS_SERIAL_1 + +struct ao_samd21_usart ao_samd21_usart1; + +void samd21_sercom1_isr(void) { ao_usart_isr(&ao_samd21_usart1, USE_SERIAL_1_STDIN); } + +char +ao_serial1_getchar(void) +{ + return ao_usart_getchar(&ao_samd21_usart1); +} + +void +ao_serial1_putchar(char c) +{ + ao_usart_putchar(&ao_samd21_usart1, c); +} + +int +_ao_serial1_pollchar(void) +{ + return _ao_usart_pollchar(&ao_samd21_usart1); +} + +void +ao_serial1_drain(void) +{ + ao_usart_drain(&ao_samd21_usart1); +} + +void +ao_serial1_set_speed(uint8_t speed) +{ + ao_usart_drain(&ao_samd21_usart1); + ao_usart_set_speed(&ao_samd21_usart1, speed); +} +#endif /* HAS_SERIAL_1 */ + void ao_serial_init(void) { + uint8_t txpo, rxpo; #if HAS_SERIAL_0 #if SERIAL_0_PA10_PA11 @@ -256,12 +310,14 @@ ao_serial_init(void) ao_enable_port(&samd21_port_a); samd21_port_pmux_set(&samd21_port_a, 10, SAMD21_PORT_PMUX_FUNC_C); samd21_port_pmux_set(&samd21_port_a, 11, SAMD21_PORT_PMUX_FUNC_C); + txpo = SAMD21_SERCOM_CTRLA_TXPO_TX_2; /* pad 2 */ + rxpo = SAMD21_SERCOM_CTRLA_RXPO_RX_3; /* pad 3 */ #else #error "No SERIAL_0 port configuration specified" #endif ao_samd21_usart0.reg = &samd21_sercom0; - ao_usart_init(&ao_samd21_usart0, 0, 0); + ao_usart_init(&ao_samd21_usart0, 0, 0, txpo, rxpo); #if USE_SERIAL_0_STDIN ao_add_stdio(_ao_serial0_pollchar, @@ -269,4 +325,26 @@ ao_serial_init(void) NULL); #endif #endif +#if HAS_SERIAL_1 + +#if SERIAL_1_PA00_PA01 + /* Pin settings */ + ao_enable_port(&samd21_port_a); + samd21_port_pmux_set(&samd21_port_a, 0, SAMD21_PORT_PMUX_FUNC_D); + samd21_port_pmux_set(&samd21_port_a, 1, SAMD21_PORT_PMUX_FUNC_D); + txpo = SAMD21_SERCOM_CTRLA_TXPO_TX_0; + rxpo = SAMD21_SERCOM_CTRLA_RXPO_RX_1; +#else +#error "No SERIAL_1 port configuration specified" +#endif + + ao_samd21_usart1.reg = &samd21_sercom1; + ao_usart_init(&ao_samd21_usart1, 0, 1, txpo, rxpo); + +#if USE_SERIAL_1_STDIN + ao_add_stdio(_ao_serial1_pollchar, + ao_serial1_putchar, + NULL); +#endif +#endif }