140 lines
5.0 KiB
C
140 lines
5.0 KiB
C
/*
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* This file is part of the Micro Python 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) 2016 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 <stdint.h>
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#include <stdio.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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#ifdef HAL_UART_MODULE_ENABLED
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#ifdef NRF51
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#define UART_BASE ((NRF_UART_Type *) NRF_UART0_BASE)
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#define UART_IRQ_NUM UART0_IRQn
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#else
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#define UART_BASE ((NRF_UART_Type *) NRF_UART0_BASE)
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#define UART_IRQ_NUM UARTE0_UART0_IRQn
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#endif
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uint32_t hal_uart_baudrate_lookup[] = {
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UART_BAUDRATE_BAUDRATE_Baud1200, ///< 1200 baud.
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UART_BAUDRATE_BAUDRATE_Baud2400, ///< 2400 baud.
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UART_BAUDRATE_BAUDRATE_Baud4800, ///< 4800 baud.
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UART_BAUDRATE_BAUDRATE_Baud9600, ///< 9600 baud.
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UART_BAUDRATE_BAUDRATE_Baud14400, ///< 14400 baud.
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UART_BAUDRATE_BAUDRATE_Baud19200, ///< 19200 baud.
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UART_BAUDRATE_BAUDRATE_Baud28800, ///< 28800 baud.
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UART_BAUDRATE_BAUDRATE_Baud38400, ///< 38400 baud.
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UART_BAUDRATE_BAUDRATE_Baud57600, ///< 57600 baud.
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UART_BAUDRATE_BAUDRATE_Baud76800, ///< 76800 baud.
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UART_BAUDRATE_BAUDRATE_Baud115200, ///< 115200 baud.
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UART_BAUDRATE_BAUDRATE_Baud230400, ///< 230400 baud.
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UART_BAUDRATE_BAUDRATE_Baud250000, ///< 250000 baud.
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UART_BAUDRATE_BAUDRATE_Baud460800, ///< 460800 baud.
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UART_BAUDRATE_BAUDRATE_Baud921600, ///< 921600 baud.
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UART_BAUDRATE_BAUDRATE_Baud1M, ///< 1000000 baud.
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};
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void nrf_uart_char_write(uint8_t ch) {
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UART_BASE->TXD = (uint8_t)ch;
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while (UART_BASE->EVENTS_TXDRDY != 1) {
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// Blocking wait.
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}
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// Clear the TX flag.
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UART_BASE->EVENTS_TXDRDY = 0;
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}
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uint8_t nrf_uart_char_read(void) {
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while (UART_BASE->EVENTS_RXDRDY != 1) {
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// Wait for RXD data.
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}
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UART_BASE->EVENTS_RXDRDY = 0;
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return (uint8_t)UART_BASE->RXD;
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}
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void nrf_uart_buffer_write(uint8_t * p_buffer, uint32_t num_of_bytes, uart_complete_cb cb) {
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int i = 0;
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uint8_t ch = p_buffer[i++];
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while (i < num_of_bytes) {
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nrf_uart_char_write(ch);
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ch = p_buffer[i++];
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}
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cb();
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}
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void nrf_uart_buffer_read(uint8_t * p_buffer, uint32_t num_of_bytes, uart_complete_cb cb) {
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int i = 0;
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while (i < num_of_bytes) {
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uint8_t ch = nrf_uart_char_read();
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p_buffer[i] = ch;
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i++;
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}
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cb();
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}
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void nrf_uart_init(hal_uart_init_t const * p_uart_init) {
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hal_gpio_cfg_pin(p_uart_init->tx_pin->port, p_uart_init->tx_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED);
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hal_gpio_cfg_pin(p_uart_init->tx_pin->port, p_uart_init->rx_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED);
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hal_gpio_pin_clear(p_uart_init->tx_pin->port, p_uart_init->tx_pin->pin);
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UART_BASE->PSELTXD = p_uart_init->tx_pin->pin;
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UART_BASE->PSELRXD = p_uart_init->rx_pin->pin;
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#if NRF52840_XXAA
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UART_BASE->PSELTXD |= (p_uart_init->tx_pin->port << UARTE_PSEL_TXD_PORT_Pos);
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UART_BASE->PSELRXD |= (p_uart_init->rx_pin->port << UARTE_PSEL_RXD_PORT_Pos);
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#endif
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if (p_uart_init->flow_control) {
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hal_gpio_cfg_pin(p_uart_init->rts_pin->port, p_uart_init->rts_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED);
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hal_gpio_cfg_pin(p_uart_init->cts_pin->port, p_uart_init->cts_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED);
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UART_BASE->PSELCTS = p_uart_init->cts_pin->pin;
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UART_BASE->PSELRTS = p_uart_init->rts_pin->pin;
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#if NRF52840_XXAA
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UART_BASE->PSELCTS |= (p_uart_init->cts_pin->port << UARTE_PSEL_CTS_PORT_Pos);
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UART_BASE->PSELRTS |= (p_uart_init->rts_pin->port << UARTE_PSEL_RTS_PORT_Pos);
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#endif
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UART_BASE->CONFIG = (UART_CONFIG_HWFC_Enabled << UART_CONFIG_HWFC_Pos);
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}
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UART_BASE->BAUDRATE = (hal_uart_baudrate_lookup[p_uart_init->baud_rate]);
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UART_BASE->ENABLE = (UART_ENABLE_ENABLE_Enabled << UART_ENABLE_ENABLE_Pos);
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UART_BASE->EVENTS_TXDRDY = 0;
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UART_BASE->EVENTS_RXDRDY = 0;
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UART_BASE->TASKS_STARTTX = 1;
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UART_BASE->TASKS_STARTRX = 1;
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}
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#endif // HAL_UART_MODULE_ENABLED
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