mirror of
https://github.com/licsber/micropython.git
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987381dfa0
Leave it enabled by default on all targets. This is only possible when using UART-over-BLE (NUS) instead of the default hardware peripheral. The flash area saved is quite substantial (about 2.2KB) so this is useful for custom builds that do not need UART.
386 lines
12 KiB
C
386 lines
12 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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* Copyright (c) 2015 Glenn Ruben Bakke
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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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#include <stdbool.h>
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#include <string.h>
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#include <stdarg.h>
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#include "py/nlr.h"
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "py/mperrno.h"
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#include "py/mphal.h"
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#include "pin.h"
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#include "genhdr/pins.h"
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#include "uart.h"
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#include "mpconfigboard.h"
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#include "nrf.h"
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#include "mphalport.h"
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#include "hal_uart.h"
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#if MICROPY_PY_MACHINE_UART
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typedef struct _machine_hard_uart_obj_t {
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mp_obj_base_t base;
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UART_HandleTypeDef * uart;
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byte char_width; // 0 for 7,8 bit chars, 1 for 9 bit chars
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} machine_hard_uart_obj_t;
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UART_HandleTypeDef UARTHandle0 = {.p_instance = NULL, .init.id = 0};
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#if NRF52840_XXAA
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UART_HandleTypeDef UARTHandle1 = {.p_instance = NULL, .init.id = 1};
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#endif
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STATIC machine_hard_uart_obj_t machine_hard_uart_obj[] = {
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{{&machine_hard_uart_type}, &UARTHandle0},
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#if NRF52840_XXAA
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{{&machine_hard_uart_type}, &UARTHandle1},
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#endif
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};
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void uart_init0(void) {
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// reset the UART handles
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memset(&UARTHandle0, 0, sizeof(UART_HandleTypeDef));
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UARTHandle0.p_instance = UART_BASE(0);
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#if NRF52840_XXAA
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memset(&UARTHandle1, 0, sizeof(UART_HandleTypeDef));
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UARTHandle0.p_instance = UART_BASE(1);
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#endif
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}
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STATIC int uart_find(mp_obj_t id) {
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// given an integer id
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int uart_id = mp_obj_get_int(id);
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if (uart_id >= 0 && uart_id <= MP_ARRAY_SIZE(machine_hard_uart_obj)
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&& machine_hard_uart_obj[uart_id].uart != NULL) {
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return uart_id;
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}
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
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"UART(%d) does not exist", uart_id));
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}
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void uart_irq_handler(mp_uint_t uart_id) {
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}
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bool uart_rx_any(machine_hard_uart_obj_t *uart_obj) {
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// TODO: uart will block for now.
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return true;
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}
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int uart_rx_char(machine_hard_uart_obj_t * self) {
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uint8_t ch;
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hal_uart_char_read(self->uart->p_instance, &ch);
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return (int)ch;
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}
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STATIC hal_uart_error_t uart_tx_char(machine_hard_uart_obj_t * self, int c) {
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return hal_uart_char_write(self->uart->p_instance, (char)c);
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}
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void uart_tx_strn(machine_hard_uart_obj_t *uart_obj, const char *str, uint len) {
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for (const char *top = str + len; str < top; str++) {
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uart_tx_char(uart_obj, *str);
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}
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}
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void uart_tx_strn_cooked(machine_hard_uart_obj_t *uart_obj, const char *str, uint len) {
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for (const char *top = str + len; str < top; str++) {
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if (*str == '\n') {
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uart_tx_char(uart_obj, '\r');
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}
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uart_tx_char(uart_obj, *str);
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}
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}
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/******************************************************************************/
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/* MicroPython bindings */
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STATIC void machine_hard_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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}
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/// \method init(baudrate, bits=8, parity=None, stop=1, *, timeout=1000, timeout_char=0, read_buf_len=64)
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///
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/// Initialise the UART bus with the given parameters:
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/// - `id`is bus id.
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/// - `baudrate` is the clock rate.
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/// - `bits` is the number of bits per byte, 7, 8 or 9.
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/// - `parity` is the parity, `None`, 0 (even) or 1 (odd).
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/// - `stop` is the number of stop bits, 1 or 2.
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/// - `timeout` is the timeout in milliseconds to wait for the first character.
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/// - `timeout_char` is the timeout in milliseconds to wait between characters.
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/// - `read_buf_len` is the character length of the read buffer (0 to disable).
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STATIC mp_obj_t machine_hard_uart_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_baudrate, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 9600} },
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{ MP_QSTR_bits, MP_ARG_INT, {.u_int = 8} },
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{ MP_QSTR_parity, MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_stop, MP_ARG_INT, {.u_int = 1} },
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{ MP_QSTR_flow, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1000} },
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{ MP_QSTR_timeout_char, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_read_buf_len, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 64} },
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};
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// parse args
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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// get static peripheral object
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int uart_id = uart_find(args[0].u_obj);
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machine_hard_uart_obj_t * self = &machine_hard_uart_obj[uart_id];
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hal_uart_init_t * init = &self->uart->init;
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// flow control
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init->flow_control = args[5].u_int;
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#if MICROPY_HW_UART1_HWFC
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init->flow_control = true;
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#else
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init->flow_control = false;
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#endif
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init->use_parity = false;
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#if (BLUETOOTH_SD == 100)
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init->irq_priority = 3;
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#else
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init->irq_priority = 6;
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#endif
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switch (args[1].u_int) {
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case 1200:
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init->baud_rate = HAL_UART_BAUD_1K2;
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break;
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case 2400:
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init->baud_rate = HAL_UART_BAUD_2K4;
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break;
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case 4800:
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init->baud_rate = HAL_UART_BAUD_4K8;
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break;
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case 9600:
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init->baud_rate = HAL_UART_BAUD_9K6;
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break;
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case 14400:
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init->baud_rate = HAL_UART_BAUD_14K4;
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break;
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case 19200:
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init->baud_rate = HAL_UART_BAUD_19K2;
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break;
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case 28800:
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init->baud_rate = HAL_UART_BAUD_28K8;
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break;
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case 38400:
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init->baud_rate = HAL_UART_BAUD_38K4;
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break;
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case 57600:
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init->baud_rate = HAL_UART_BAUD_57K6;
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break;
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case 76800:
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init->baud_rate = HAL_UART_BAUD_76K8;
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break;
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case 115200:
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init->baud_rate = HAL_UART_BAUD_115K2;
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break;
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case 230400:
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init->baud_rate = HAL_UART_BAUD_230K4;
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break;
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case 250000:
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init->baud_rate = HAL_UART_BAUD_250K0;
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break;
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case 500000:
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init->baud_rate = HAL_UART_BAUD_500K0;
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break;
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case 1000000:
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init->baud_rate = HAL_UART_BAUD_1M0;
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break;
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default:
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
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"UART baudrate not supported, %ul", init->baud_rate));
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break;
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}
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init->rx_pin = &MICROPY_HW_UART1_RX;
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init->tx_pin = &MICROPY_HW_UART1_TX;
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#if MICROPY_HW_UART1_HWFC
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init->rts_pin = &MICROPY_HW_UART1_RTS;
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init->cts_pin = &MICROPY_HW_UART1_CTS;
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#endif
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hal_uart_init(self->uart->p_instance, init);
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return MP_OBJ_FROM_PTR(self);
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}
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/// \method writechar(char)
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/// Write a single character on the bus. `char` is an integer to write.
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/// Return value: `None`.
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STATIC mp_obj_t machine_hard_uart_writechar(mp_obj_t self_in, mp_obj_t char_in) {
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machine_hard_uart_obj_t *self = self_in;
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// get the character to write (might be 9 bits)
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uint16_t data = mp_obj_get_int(char_in);
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hal_uart_error_t err = 0;
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for (int i = 0; i < 2; i++) {
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err = uart_tx_char(self, (int)(&data)[i]);
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}
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HAL_StatusTypeDef status = self->uart->p_instance->EVENTS_ERROR;
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if (err != HAL_UART_ERROR_NONE) {
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mp_hal_raise(status);
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_hard_uart_writechar_obj, machine_hard_uart_writechar);
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/// \method readchar()
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/// Receive a single character on the bus.
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/// Return value: The character read, as an integer. Returns -1 on timeout.
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STATIC mp_obj_t machine_hard_uart_readchar(mp_obj_t self_in) {
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machine_hard_uart_obj_t *self = self_in;
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return MP_OBJ_NEW_SMALL_INT(uart_rx_char(self));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_hard_uart_readchar_obj, machine_hard_uart_readchar);
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// uart.sendbreak()
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STATIC mp_obj_t machine_hard_uart_sendbreak(mp_obj_t self_in) {
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_hard_uart_sendbreak_obj, machine_hard_uart_sendbreak);
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STATIC const mp_rom_map_elem_t machine_hard_uart_locals_dict_table[] = {
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// instance methods
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/// \method read([nbytes])
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{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
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/// \method readline()
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{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
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/// \method readinto(buf[, nbytes])
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{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
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/// \method writechar(buf)
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{ MP_ROM_QSTR(MP_QSTR_writechar), MP_ROM_PTR(&machine_hard_uart_writechar_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readchar), MP_ROM_PTR(&machine_hard_uart_readchar_obj) },
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{ MP_ROM_QSTR(MP_QSTR_sendbreak), MP_ROM_PTR(&machine_hard_uart_sendbreak_obj) },
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// class constants
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/*
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{ MP_ROM_QSTR(MP_QSTR_RTS), MP_ROM_INT(UART_HWCONTROL_RTS) },
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{ MP_ROM_QSTR(MP_QSTR_CTS), MP_ROM_INT(UART_HWCONTROL_CTS) },
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*/
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};
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STATIC MP_DEFINE_CONST_DICT(machine_hard_uart_locals_dict, machine_hard_uart_locals_dict_table);
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STATIC mp_uint_t machine_hard_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
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machine_hard_uart_obj_t *self = self_in;
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byte *buf = buf_in;
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// check that size is a multiple of character width
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if (size & self->char_width) {
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*errcode = MP_EIO;
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return MP_STREAM_ERROR;
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}
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// convert byte size to char size
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size >>= self->char_width;
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// make sure we want at least 1 char
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if (size == 0) {
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return 0;
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}
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// read the data
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byte * orig_buf = buf;
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for (;;) {
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int data = uart_rx_char(self);
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*buf++ = data;
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if (--size == 0) {
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// return number of bytes read
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return buf - orig_buf;
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}
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}
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}
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STATIC mp_uint_t machine_hard_uart_write(mp_obj_t self_in, const void *buf_in, mp_uint_t size, int *errcode) {
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machine_hard_uart_obj_t *self = self_in;
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const byte *buf = buf_in;
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// check that size is a multiple of character width
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if (size & self->char_width) {
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*errcode = MP_EIO;
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return MP_STREAM_ERROR;
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}
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hal_uart_error_t err = 0;
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for (int i = 0; i < size; i++) {
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err = uart_tx_char(self, (int)((uint8_t *)buf)[i]);
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}
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if (err == HAL_UART_ERROR_NONE) {
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// return number of bytes written
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return size;
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} else {
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*errcode = mp_hal_status_to_errno_table[err];
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return MP_STREAM_ERROR;
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}
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}
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STATIC mp_uint_t machine_hard_uart_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
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machine_hard_uart_obj_t *self = self_in;
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(void)self;
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return MP_STREAM_ERROR;
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}
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STATIC const mp_stream_p_t uart_stream_p = {
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.read = machine_hard_uart_read,
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.write = machine_hard_uart_write,
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.ioctl = machine_hard_uart_ioctl,
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.is_text = false,
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};
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const mp_obj_type_t machine_hard_uart_type = {
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{ &mp_type_type },
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.name = MP_QSTR_UART,
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.print = machine_hard_uart_print,
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.make_new = machine_hard_uart_make_new,
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.getiter = mp_identity_getiter,
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.iternext = mp_stream_unbuffered_iter,
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.protocol = &uart_stream_p,
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.locals_dict = (mp_obj_dict_t*)&machine_hard_uart_locals_dict,
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};
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#endif // MICROPY_PY_MACHINE_UART
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