1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* 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_STM32_UART_H
#define MICROPY_INCLUDED_STM32_UART_H
#include "shared/runtime/mpirq.h"
typedef enum {
PYB_UART_NONE = 0,
PYB_UART_1 = 1,
PYB_UART_2 = 2,
PYB_UART_3 = 3,
PYB_UART_4 = 4,
PYB_UART_5 = 5,
PYB_UART_6 = 6,
PYB_UART_7 = 7,
PYB_UART_8 = 8,
PYB_UART_9 = 9,
PYB_UART_10 = 10,
#ifdef LPUART1
PYB_LPUART_1 = MICROPY_HW_MAX_UART + 1,
#endif
#ifdef LPUART2
PYB_LPUART_2 = MICROPY_HW_MAX_UART + 2,
#endif
} pyb_uart_t;
#define CHAR_WIDTH_8BIT (0)
#define CHAR_WIDTH_9BIT (1)
// OR-ed IRQ flags which are allowed to be used by the user
#define MP_UART_ALLOWED_FLAGS UART_FLAG_IDLE
// OR-ed IRQ flags which should not be touched by the user
#define MP_UART_RESERVED_FLAGS UART_FLAG_RXNE
typedef struct _pyb_uart_obj_t {
mp_obj_base_t base;
USART_TypeDef *uartx;
pyb_uart_t uart_id : 8;
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
volatile uint16_t read_buf_head; // indexes first empty slot
uint16_t read_buf_tail; // indexes first full slot (not full if equals head)
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
} pyb_uart_obj_t;
extern const mp_obj_type_t pyb_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(pyb_uart_obj_t *uart_obj,
uint32_t baudrate, uint32_t bits, uint32_t parity, uint32_t stop, uint32_t flow);
void uart_irq_config(pyb_uart_obj_t *self, bool enable);
void uart_set_rxbuf(pyb_uart_obj_t *self, size_t len, void *buf);
void uart_deinit(pyb_uart_obj_t *uart_obj);
void uart_irq_handler(mp_uint_t uart_id);
void uart_attach_to_repl(pyb_uart_obj_t *self, bool attached);
uint32_t uart_get_source_freq(pyb_uart_obj_t *self);
uint32_t uart_get_baudrate(pyb_uart_obj_t *self);
void uart_set_baudrate(pyb_uart_obj_t *self, uint32_t baudrate);
mp_uint_t uart_rx_any(pyb_uart_obj_t *uart_obj);
bool uart_rx_wait(pyb_uart_obj_t *self, uint32_t timeout);
int uart_rx_char(pyb_uart_obj_t *uart_obj);
bool uart_tx_wait(pyb_uart_obj_t *self, uint32_t timeout);
size_t uart_tx_data(pyb_uart_obj_t *self, const void *src_in, size_t num_chars, int *errcode);
void uart_tx_strn(pyb_uart_obj_t *uart_obj, const char *str, uint len);
static inline bool uart_tx_avail(pyb_uart_obj_t *self) {
#if defined(STM32F4)
return self->uartx->SR & USART_SR_TXE;
#elif defined(STM32G0) || defined(STM32H7) || defined(STM32WL)
return self->uartx->ISR & USART_ISR_TXE_TXFNF;
#else
return self->uartx->ISR & USART_ISR_TXE;
#endif
}
#endif // MICROPY_INCLUDED_STM32_UART_H
|
