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https://github.com/micropython/micropython.git
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ccc5935234
This commit adds the beginning of a new alif port with support for Alif Ensemble MCUs. See https://alifsemi.com/ Supported features of this port added by this commit: - UART REPL. - TinyUSB support, for REPL and MSC. - Octal SPI flash support, for filesystem. - machine.Pin support. General notes about the port: - It uses make, similar to other bare-metal ports here. - The toolchain is the standard arm-none-eabi- toolchain. - Flashing a board can be done using either the built-in serial bootloader, or JLink (both supported here). - There are two required submodules (one for drivers/SDK, one for security tools), both of which are open source and on GitHub. - No special hardware or software is needed for development, just a board connected over USB. OpenMV have generously sponsored the development of this port. Signed-off-by: Damien George <damien@micropython.org> Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
114 lines
3.7 KiB
C
114 lines
3.7 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) 2024 OpenMV LLC.
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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 <string.h>
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "mpuart.h"
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#if MICROPY_HW_ENABLE_UART_REPL
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#include "pinconf.h"
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#include "sys_ctrl_uart.h"
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#include "uart.h"
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#define TX_PORT PORT_12
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#define TX_PIN PIN_2
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#define RX_PORT PORT_12
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#define RX_PIN PIN_1
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#define UART_ID 4
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#define UART_IRQN UART4_IRQ_IRQn
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#define UART_PTR ((UART_Type *)UART4_BASE)
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#define BAUDRATE 115200
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#define SYST_PCLK 100000000
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static UART_TRANSFER transfer;
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void mp_uart_init(void) {
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pinconf_set(TX_PORT, TX_PIN, PINMUX_ALTERNATE_FUNCTION_2, 0);
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pinconf_set(RX_PORT, RX_PIN, PINMUX_ALTERNATE_FUNCTION_2, PADCTRL_READ_ENABLE);
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select_uart_clock_syst_pclk(UART_ID);
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enable_uart_clock(UART_ID);
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uart_software_reset(UART_PTR);
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uart_enable_fifo(UART_PTR);
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uart_disable_tx_irq(UART_PTR);
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uart_disable_rx_irq(UART_PTR);
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uart_set_baudrate(UART_PTR, SYST_PCLK, BAUDRATE);
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uart_set_data_parity_stop_bits(UART_PTR, UART_DATA_BITS_8, UART_PARITY_NONE, UART_STOP_BITS_1);
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uart_set_flow_control(UART_PTR, UART_FLOW_CONTROL_NONE);
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NVIC_ClearPendingIRQ(UART_IRQN);
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NVIC_SetPriority(UART_IRQN, IRQ_PRI_UART_REPL);
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NVIC_EnableIRQ(UART_IRQN);
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uart_set_tx_trigger(UART_PTR, UART_TX_FIFO_EMPTY);
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uart_set_rx_trigger(UART_PTR, UART_RX_ONE_CHAR_IN_FIFO);
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uart_enable_rx_irq(UART_PTR);
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}
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void mp_uart_write_strn(const char *str, size_t len) {
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memset(&transfer, 0, sizeof(transfer));
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transfer.tx_buf = (uint8_t *)str;
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transfer.tx_total_num = len;
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transfer.tx_curr_cnt = 0U;
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transfer.status = UART_TRANSFER_STATUS_NONE;
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uart_enable_tx_irq(UART_PTR);
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uint32_t start = mp_hal_ticks_ms();
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while (transfer.status == UART_TRANSFER_STATUS_NONE) {
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if (mp_hal_ticks_ms() - start > 10 * len) {
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break;
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}
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__WFE();
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}
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uart_disable_tx_irq(UART_PTR);
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}
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void UART4_IRQHandler(void) {
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if (UART_PTR->UART_RFL) {
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for (;;) {
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uint32_t rx_fifo_available_cnt = UART_PTR->UART_RFL;
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if (rx_fifo_available_cnt == 0) {
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break;
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}
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for (uint32_t i = 0; i < rx_fifo_available_cnt; ++i) {
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int c = UART_PTR->UART_RBR;
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#if MICROPY_KBD_EXCEPTION
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if (c == mp_interrupt_char) {
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mp_sched_keyboard_interrupt();
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continue;
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}
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#endif
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ringbuf_put(&stdin_ringbuf, c);
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}
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}
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} else {
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uart_irq_handler(UART_PTR, &transfer);
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}
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__SEV();
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}
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#endif
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