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get UART working on SERCOM3 (9-pin A2/D1)

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This commit is contained in:
Joey Castillo 2021-07-20 15:45:04 -04:00
parent 18054a9e8f
commit bc1ee49d80
1 changed files with 12 additions and 12 deletions
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24
Sensor Watch Starter Project/main.c
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@ -40,8 +40,8 @@
HAL_GPIO_PIN(LED, A, 21)
HAL_GPIO_PIN(BUTTON, A, 30)
HAL_GPIO_PIN(UART_TX, A, 22)
HAL_GPIO_PIN(UART_RX, A, 23)
HAL_GPIO_PIN(UART_TX, B, 0)
HAL_GPIO_PIN(UART_RX, B, 2)
//-----------------------------------------------------------------------------
static void timer_set_period(uint16_t i)
@ -93,28 +93,28 @@ static void uart_init(uint32_t baud)
HAL_GPIO_UART_RX_in();
HAL_GPIO_UART_RX_pmuxen(HAL_GPIO_PMUX_C);
MCLK->APBCMASK.reg |= MCLK_APBCMASK_SERCOM0;
MCLK->APBCMASK.reg |= MCLK_APBCMASK_SERCOM3;
GCLK->PCHCTRL[SERCOM0_GCLK_ID_CORE].reg = GCLK_PCHCTRL_GEN(0) | GCLK_PCHCTRL_CHEN;
while (0 == (GCLK->PCHCTRL[SERCOM0_GCLK_ID_CORE].reg & GCLK_PCHCTRL_CHEN));
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));
SERCOM0->USART.CTRLA.reg =
SERCOM3->USART.CTRLA.reg =
SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE(1/*USART_INT_CLK*/) |
SERCOM_USART_CTRLA_RXPO(3/*PAD3*/) | SERCOM_USART_CTRLA_TXPO(1/*PAD2*/);
SERCOM_USART_CTRLA_RXPO(0/*PAD0*/) | SERCOM_USART_CTRLA_TXPO(1/*PAD2*/);
SERCOM0->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN |
SERCOM3->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN |
SERCOM_USART_CTRLB_CHSIZE(0/*8 bits*/);
SERCOM0->USART.BAUD.reg = (uint16_t)br;
SERCOM3->USART.BAUD.reg = (uint16_t)br;
SERCOM0->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE;
SERCOM3->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE;
}
//-----------------------------------------------------------------------------
static void uart_putc(char c)
{
while (!(SERCOM0->USART.INTFLAG.reg & SERCOM_USART_INTFLAG_DRE));
SERCOM0->USART.DATA.reg = c;
while (!(SERCOM3->USART.INTFLAG.reg & SERCOM_USART_INTFLAG_DRE));
SERCOM3->USART.DATA.reg = c;
}
//-----------------------------------------------------------------------------