circuitpython/ports/renesas-ra/uart.h

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2021 Renesas Electronics Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef MICROPY_INCLUDED_RA_UART_H
#define MICROPY_INCLUDED_RA_UART_H
#include "shared/runtime/mpirq.h"
#include "pin.h"
typedef enum {
HW_UART_0 = 0,
HW_UART_1 = 1,
HW_UART_2 = 2,
HW_UART_3 = 3,
HW_UART_4 = 4,
HW_UART_5 = 5,
HW_UART_6 = 6,
HW_UART_7 = 7,
HW_UART_8 = 8,
HW_UART_9 = 9,
} machine_uart_t;
#define CHAR_WIDTH_8BIT (0)
#define CHAR_WIDTH_9BIT (1)
#define UART_WORDLENGTH_8B (8)
#define UART_STOPBITS_1 (1)
#define UART_STOPBITS_2 (2)
#define UART_PARITY_NONE (0)
#define UART_PARITY_ODD (1)
#define UART_PARITY_EVEN (2)
#define UART_HWCONTROL_CTS (1)
#define UART_HWCONTROL_RTS (2)
// OR-ed IRQ flags which are allowed to be used by the user
#define MP_UART_ALLOWED_FLAGS ((uint32_t)0x00000010)
// OR-ed IRQ flags which should not be touched by the user
#define MP_UART_RESERVED_FLAGS ((uint16_t)0x0020)
typedef struct _machine_uart_obj_t {
mp_obj_base_t base;
machine_uart_t uart_id : 8;
uint32_t baudrate;
const machine_pin_obj_t *rx;
const machine_pin_obj_t *tx;
const machine_pin_obj_t *cts;
const machine_pin_obj_t *rts;
uint8_t bits;
uint8_t parity;
uint8_t stop;
uint8_t flow;
bool is_static : 1;
bool is_enabled : 1;
bool attached_to_repl; // whether the UART is attached to REPL
byte char_width; // 0 for 7,8 bit chars, 1 for 9 bit chars
uint16_t char_mask; // 0x7f for 7 bit, 0xff for 8 bit, 0x1ff for 9 bit
uint16_t timeout; // timeout waiting for first char
uint16_t timeout_char; // timeout waiting between chars
uint16_t read_buf_len; // len in chars; buf can hold len-1 chars
byte *read_buf; // byte or uint16_t, depending on char size
uint16_t mp_irq_trigger; // user IRQ trigger mask
uint16_t mp_irq_flags; // user IRQ active IRQ flags
mp_irq_obj_t *mp_irq_obj; // user IRQ object
} machine_uart_obj_t;
extern const mp_obj_type_t machine_uart_type;
extern const mp_irq_methods_t uart_irq_methods;
void uart_init0(void);
void uart_deinit_all(void);
bool uart_exists(int uart_id);
bool uart_init(machine_uart_obj_t *uart_obj,
uint32_t baudrate, uint32_t bits, uint32_t parity, uint32_t stop, uint32_t flow);
void uart_irq_config(machine_uart_obj_t *self, bool enable);
void uart_set_rxbuf(machine_uart_obj_t *self, size_t len, void *buf);
void uart_deinit(machine_uart_obj_t *uart_obj);
// void uart_irq_handler(mp_uint_t uart_id);
void uart_attach_to_repl(machine_uart_obj_t *self, bool attached);
uint32_t uart_get_baudrate(machine_uart_obj_t *self);
mp_uint_t uart_rx_any(machine_uart_obj_t *uart_obj);
mp_uint_t uart_tx_avail(machine_uart_obj_t *uart_obj);
mp_uint_t uart_tx_busy(machine_uart_obj_t *uart_obj);
mp_uint_t uart_tx_txbuf(machine_uart_obj_t *self);
bool uart_rx_wait(machine_uart_obj_t *self, uint32_t timeout);
int uart_rx_char(machine_uart_obj_t *uart_obj);
bool uart_tx_wait(machine_uart_obj_t *self, uint32_t timeout);
size_t uart_tx_data(machine_uart_obj_t *self, const void *src_in, size_t num_chars, int *errcode);
void uart_tx_strn(machine_uart_obj_t *uart_obj, const char *str, uint len);
#endif // MICROPY_INCLUDED_RA_UART_H