diff options
Diffstat (limited to 'watch-library/hardware')
| -rw-r--r-- | watch-library/hardware/hw/driver_init.h | 3 | ||||
| -rw-r--r-- | watch-library/hardware/watch/watch_uart.c | 98 |
2 files changed, 100 insertions, 1 deletions
diff --git a/watch-library/hardware/hw/driver_init.h b/watch-library/hardware/hw/driver_init.h index d1c33218..6b5abaf3 100644 --- a/watch-library/hardware/hw/driver_init.h +++ b/watch-library/hardware/hw/driver_init.h @@ -33,6 +33,7 @@ extern "C" { #include <hal_ext_irq.h> #include <hal_i2c_m_sync.h> #include <hal_spi_m_sync.h> +#include <hal_usart_sync.h> #include <hal_delay.h> #include <hal_slcd_sync.h> @@ -40,6 +41,8 @@ extern struct adc_sync_descriptor ADC_0; extern struct i2c_m_sync_desc I2C_0; +extern struct usart_sync_descriptor USART_0; + extern struct slcd_sync_descriptor SEGMENT_LCD_0; void I2C_0_CLOCK_init(void); diff --git a/watch-library/hardware/watch/watch_uart.c b/watch-library/hardware/watch/watch_uart.c index 64b63bee..c8e0600d 100644 --- a/watch-library/hardware/watch/watch_uart.c +++ b/watch-library/hardware/watch/watch_uart.c @@ -22,6 +22,103 @@ * SOFTWARE. */ +#include "watch_uart.h" +#include <string.h> + +struct usart_sync_descriptor USART_0; +struct io_descriptor *uart_io; + +void watch_enable_uart(const uint8_t tx_pin, const uint8_t rx_pin, uint32_t baud) { + SERCOM_USART_CTRLA_Type ctrla; + SERCOM_USART_CTRLB_Type ctrlb; + ctrla.reg = SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE(1); + ctrlb.reg = SERCOM_USART_CTRLB_CHSIZE(0); + + MCLK->APBCMASK.reg |= MCLK_APBCMASK_SERCOM3; + GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg = GCLK_PCHCTRL_GEN(0) | GCLK_PCHCTRL_CHEN; + + while (0 == (GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg & GCLK_PCHCTRL_CHEN)) { + // wait + } + + usart_sync_init(&USART_0, SERCOM3, (void *)NULL); + + SERCOM3->USART.CTRLA.reg &= ~SERCOM_USART_CTRLA_ENABLE; + + switch (tx_pin) { + case A2: + gpio_set_pin_direction(tx_pin, GPIO_DIRECTION_OUT); + gpio_set_pin_function(tx_pin, PINMUX_PB02C_SERCOM3_PAD0); + ctrla.reg |= SERCOM_USART_CTRLA_TXPO(0); + ctrlb.reg |= SERCOM_USART_CTRLB_TXEN; + break; + case A4: + gpio_set_pin_direction(tx_pin, GPIO_DIRECTION_OUT); + gpio_set_pin_function(tx_pin, PINMUX_PB00C_SERCOM3_PAD2); + ctrla.reg |= SERCOM_USART_CTRLA_TXPO(1); + ctrlb.reg |= SERCOM_USART_CTRLB_TXEN; + break; + default: + break; + } + + switch (rx_pin) { + case A1: + gpio_set_pin_direction(rx_pin, GPIO_DIRECTION_IN); + gpio_set_pin_function(rx_pin, PINMUX_PB01C_SERCOM3_PAD3); + ctrla.reg |= SERCOM_USART_CTRLA_RXPO(3); + ctrlb.reg |= SERCOM_USART_CTRLB_RXEN; + break; + case A2: + gpio_set_pin_direction(rx_pin, GPIO_DIRECTION_IN); + gpio_set_pin_function(rx_pin, PINMUX_PB02C_SERCOM3_PAD0); + ctrla.reg |= SERCOM_USART_CTRLA_RXPO(0); + ctrlb.reg |= SERCOM_USART_CTRLB_RXEN; + break; + case A3: + gpio_set_pin_direction(rx_pin, GPIO_DIRECTION_IN); + gpio_set_pin_function(rx_pin, PINMUX_PB03C_SERCOM3_PAD1); + ctrla.reg |= SERCOM_USART_CTRLA_RXPO(1); + ctrlb.reg |= SERCOM_USART_CTRLB_RXEN; + break; + case A4: + gpio_set_pin_direction(rx_pin, GPIO_DIRECTION_IN); + gpio_set_pin_function(rx_pin, PINMUX_PB00C_SERCOM3_PAD2); + ctrla.reg |= SERCOM_USART_CTRLA_RXPO(2); + ctrlb.reg |= SERCOM_USART_CTRLB_RXEN; + break; + default: + break; + } + SERCOM3->USART.CTRLA.reg = ctrla.reg; + SERCOM3->USART.CTRLB.reg = ctrlb.reg; + + if (hri_usbdevice_get_CTRLA_ENABLE_bit(USB)) { + uint64_t br = 65536 - ((65536 * 16.0f * baud) / 8000000); + SERCOM3->USART.BAUD.reg = (uint16_t)br; + } else { + uint64_t br = 65536 - ((65536 * 16.0f * baud) / 4000000); + SERCOM3->USART.BAUD.reg = (uint16_t)br; + } + + SERCOM3->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE; + + usart_sync_enable(&USART_0); + usart_sync_get_io_descriptor(&USART_0, &uart_io); +} + +void watch_uart_puts(char *s) { + io_write(uart_io, (uint8_t *)s, strlen(s)); +} + +char watch_uart_getc(void) { + uint8_t retval; + io_read(uart_io, &retval, 1); + return retval; +} + +// Begin deprecated functions + /* * UART methods are Copyright (c) 2014-2017, Alex Taradov <alex@taradov.com> * All rights reserved. @@ -50,7 +147,6 @@ * POSSIBILITY OF SUCH DAMAGE. */ -#include "watch_uart.h" #include "peripheral_clk_config.h" void watch_enable_debug_uart(uint32_t baud) { |