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atsamd: Initial support for SAMD51

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2019-01-14 18:21:50 -05:00
parent f6ce875818
commit 8cd83b4c2d
17 changed files with 434 additions and 61 deletions
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41
src/atsamd/serial.c
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@@ -1,12 +1,11 @@
// samd21 serial port
//
// Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2018-2019 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "board/serial_irq.h" // serial_rx_data
#include "internal.h" // enable_pclock
#include "samd21.h" // SERCOM0
#include "sched.h" // DECL_INIT
void
@@ -20,7 +19,7 @@ serial_init(void)
// Configure serial
SercomUsart *su = &SERCOM0->USART;
su->CTRLA.reg = 0;
uint32_t areg = (SERCOM_USART_CTRLA_MODE_USART_INT_CLK
uint32_t areg = (SERCOM_USART_CTRLA_MODE(1)
| SERCOM_USART_CTRLA_DORD
| SERCOM_USART_CTRLA_SAMPR(1)
| SERCOM_USART_CTRLA_TXPO(1)
@@ -31,13 +30,31 @@ serial_init(void)
uint32_t baud8 = freq / (2 * CONFIG_SERIAL_BAUD);
su->BAUD.reg = (SERCOM_USART_BAUD_FRAC_BAUD(baud8 / 8)
| SERCOM_USART_BAUD_FRAC_FP(baud8 % 8));
NVIC_SetPriority(SERCOM0_IRQn, 0);
NVIC_EnableIRQ(SERCOM0_IRQn);
// enable irqs
su->INTENSET.reg = SERCOM_USART_INTENSET_RXC;
su->CTRLA.reg = areg | SERCOM_USART_CTRLA_ENABLE;
#if CONFIG_MACH_SAMD21
NVIC_SetPriority(SERCOM0_IRQn, 0);
NVIC_EnableIRQ(SERCOM0_IRQn);
#elif CONFIG_MACH_SAMD51
NVIC_SetPriority(SERCOM0_0_IRQn, 0);
NVIC_SetPriority(SERCOM0_1_IRQn, 0);
NVIC_SetPriority(SERCOM0_2_IRQn, 0);
NVIC_SetPriority(SERCOM0_3_IRQn, 0);
NVIC_EnableIRQ(SERCOM0_0_IRQn);
NVIC_EnableIRQ(SERCOM0_1_IRQn);
NVIC_EnableIRQ(SERCOM0_2_IRQn);
NVIC_EnableIRQ(SERCOM0_3_IRQn);
#endif
}
DECL_INIT(serial_init);
void
serial_enable_tx_irq(void)
{
SERCOM0->USART.INTENSET.reg = SERCOM_USART_INTENSET_DRE;
}
void __visible
SERCOM0_Handler(void)
{
@@ -54,8 +71,12 @@ SERCOM0_Handler(void)
}
}
void
serial_enable_tx_irq(void)
{
SERCOM0->USART.INTENSET.reg = SERCOM_USART_INTENSET_DRE;
}
// Aliases for irq handeler on SAMD51
void SERCOM0_0_Handler(void)
__visible __attribute__((alias("SERCOM0_Handler")));
void SERCOM0_1_Handler(void)
__visible __attribute__((alias("SERCOM0_Handler")));
void SERCOM0_2_Handler(void)
__visible __attribute__((alias("SERCOM0_Handler")));
void SERCOM0_3_Handler(void)
__visible __attribute__((alias("SERCOM0_Handler")));