112 lines
4.3 KiB
C
112 lines
4.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_STM32_UART_H
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#define MICROPY_INCLUDED_STM32_UART_H
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#include "shared/runtime/mpirq.h"
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typedef enum {
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PYB_UART_NONE = 0,
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PYB_UART_1 = 1,
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PYB_UART_2 = 2,
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PYB_UART_3 = 3,
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PYB_UART_4 = 4,
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PYB_UART_5 = 5,
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PYB_UART_6 = 6,
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PYB_UART_7 = 7,
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PYB_UART_8 = 8,
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PYB_UART_9 = 9,
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PYB_UART_10 = 10,
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#ifdef LPUART1
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PYB_LPUART_1 = MICROPY_HW_MAX_UART + 1,
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#endif
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} pyb_uart_t;
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#define CHAR_WIDTH_8BIT (0)
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#define CHAR_WIDTH_9BIT (1)
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// OR-ed IRQ flags which are allowed to be used by the user
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#define MP_UART_ALLOWED_FLAGS UART_FLAG_IDLE
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// OR-ed IRQ flags which should not be touched by the user
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#define MP_UART_RESERVED_FLAGS UART_FLAG_RXNE
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typedef struct _pyb_uart_obj_t {
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mp_obj_base_t base;
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USART_TypeDef *uartx;
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pyb_uart_t uart_id : 8;
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bool is_static : 1;
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bool is_enabled : 1;
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bool attached_to_repl; // whether the UART is attached to REPL
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byte char_width; // 0 for 7,8 bit chars, 1 for 9 bit chars
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uint16_t char_mask; // 0x7f for 7 bit, 0xff for 8 bit, 0x1ff for 9 bit
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uint16_t timeout; // timeout waiting for first char
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uint16_t timeout_char; // timeout waiting between chars
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uint16_t read_buf_len; // len in chars; buf can hold len-1 chars
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volatile uint16_t read_buf_head; // indexes first empty slot
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uint16_t read_buf_tail; // indexes first full slot (not full if equals head)
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byte *read_buf; // byte or uint16_t, depending on char size
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uint16_t mp_irq_trigger; // user IRQ trigger mask
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uint16_t mp_irq_flags; // user IRQ active IRQ flags
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mp_irq_obj_t *mp_irq_obj; // user IRQ object
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} pyb_uart_obj_t;
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extern const mp_obj_type_t pyb_uart_type;
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extern const mp_irq_methods_t uart_irq_methods;
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void uart_init0(void);
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void uart_deinit_all(void);
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bool uart_exists(int uart_id);
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bool uart_init(pyb_uart_obj_t *uart_obj,
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uint32_t baudrate, uint32_t bits, uint32_t parity, uint32_t stop, uint32_t flow);
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void uart_irq_config(pyb_uart_obj_t *self, bool enable);
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void uart_set_rxbuf(pyb_uart_obj_t *self, size_t len, void *buf);
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void uart_deinit(pyb_uart_obj_t *uart_obj);
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void uart_irq_handler(mp_uint_t uart_id);
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void uart_attach_to_repl(pyb_uart_obj_t *self, bool attached);
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uint32_t uart_get_baudrate(pyb_uart_obj_t *self);
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void uart_set_baudrate(pyb_uart_obj_t *self, uint32_t baudrate);
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mp_uint_t uart_rx_any(pyb_uart_obj_t *uart_obj);
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bool uart_rx_wait(pyb_uart_obj_t *self, uint32_t timeout);
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int uart_rx_char(pyb_uart_obj_t *uart_obj);
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bool uart_tx_wait(pyb_uart_obj_t *self, uint32_t timeout);
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size_t uart_tx_data(pyb_uart_obj_t *self, const void *src_in, size_t num_chars, int *errcode);
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void uart_tx_strn(pyb_uart_obj_t *uart_obj, const char *str, uint len);
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static inline bool uart_tx_avail(pyb_uart_obj_t *self) {
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#if defined(STM32F4)
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return self->uartx->SR & USART_SR_TXE;
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#elif defined(STM32H7)
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return self->uartx->ISR & USART_ISR_TXE_TXFNF;
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#else
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return self->uartx->ISR & USART_ISR_TXE;
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#endif
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}
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#endif // MICROPY_INCLUDED_STM32_UART_H
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