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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Glenn Ruben Bakke
*
* 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.
*/
#include <stdint.h>
#include <stdio.h>
#include "nrf.h"
#include "mphalport.h"
#include "hal_uart.h"
#ifdef HAL_UART_MODULE_ENABLED
uint32_t hal_uart_baudrate_lookup[] = {
UART_BAUDRATE_BAUDRATE_Baud1200, ///< 1200 baud.
UART_BAUDRATE_BAUDRATE_Baud2400, ///< 2400 baud.
UART_BAUDRATE_BAUDRATE_Baud4800, ///< 4800 baud.
UART_BAUDRATE_BAUDRATE_Baud9600, ///< 9600 baud.
UART_BAUDRATE_BAUDRATE_Baud14400, ///< 14400 baud.
UART_BAUDRATE_BAUDRATE_Baud19200, ///< 19200 baud.
UART_BAUDRATE_BAUDRATE_Baud28800, ///< 28800 baud.
UART_BAUDRATE_BAUDRATE_Baud38400, ///< 38400 baud.
UART_BAUDRATE_BAUDRATE_Baud57600, ///< 57600 baud.
UART_BAUDRATE_BAUDRATE_Baud76800, ///< 76800 baud.
UART_BAUDRATE_BAUDRATE_Baud115200, ///< 115200 baud.
UART_BAUDRATE_BAUDRATE_Baud230400, ///< 230400 baud.
UART_BAUDRATE_BAUDRATE_Baud250000, ///< 250000 baud.
UART_BAUDRATE_BAUDRATE_Baud460800, ///< 460800 baud.
UART_BAUDRATE_BAUDRATE_Baud921600, ///< 921600 baud.
UART_BAUDRATE_BAUDRATE_Baud1M, ///< 1000000 baud.
};
hal_uart_error_t hal_uart_char_write(NRF_UART_Type * p_instance, uint8_t ch) {
p_instance->ERRORSRC = 0;
p_instance->TXD = (uint8_t)ch;
while (p_instance->EVENTS_TXDRDY != 1) {
// Blocking wait.
}
// Clear the TX flag.
p_instance->EVENTS_TXDRDY = 0;
return p_instance->ERRORSRC;
}
hal_uart_error_t hal_uart_char_read(NRF_UART_Type * p_instance, uint8_t * ch) {
p_instance->ERRORSRC = 0;
while (p_instance->EVENTS_RXDRDY != 1) {
// Wait for RXD data.
}
p_instance->EVENTS_RXDRDY = 0;
*ch = p_instance->RXD;
return p_instance->ERRORSRC;
}
hal_uart_error_t hal_uart_buffer_write(NRF_UART_Type * p_instance, uint8_t * p_buffer, uint32_t num_of_bytes, uart_complete_cb cb) {
int i = 0;
hal_uart_error_t err = 0;
uint8_t ch = p_buffer[i++];
while (i < num_of_bytes) {
err = hal_uart_char_write(p_instance, ch);
if (err) {
return err;
}
ch = p_buffer[i++];
}
cb();
return err;
}
hal_uart_error_t hal_uart_buffer_read(NRF_UART_Type * p_instance, uint8_t * p_buffer, uint32_t num_of_bytes, uart_complete_cb cb) {
int i = 0;
hal_uart_error_t err = 0;
while (i < num_of_bytes) {
hal_uart_error_t err = hal_uart_char_read(p_instance, &p_buffer[i]);
if (err) {
return err;
}
i++;
}
cb();
return err;
}
void hal_uart_init(NRF_UART_Type * p_instance, hal_uart_init_t const * p_uart_init) {
hal_gpio_cfg_pin(p_uart_init->tx_pin->port, p_uart_init->tx_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED);
hal_gpio_cfg_pin(p_uart_init->tx_pin->port, p_uart_init->rx_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED);
hal_gpio_pin_clear(p_uart_init->tx_pin->port, p_uart_init->tx_pin->pin);
p_instance->PSELTXD = p_uart_init->tx_pin->pin;
p_instance->PSELRXD = p_uart_init->rx_pin->pin;
#if NRF52840_XXAA
p_instance->PSELTXD |= (p_uart_init->tx_pin->port << UARTE_PSEL_TXD_PORT_Pos);
p_instance->PSELRXD |= (p_uart_init->rx_pin->port << UARTE_PSEL_RXD_PORT_Pos);
#endif
if (p_uart_init->flow_control) {
hal_gpio_cfg_pin(p_uart_init->rts_pin->port, p_uart_init->rts_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED);
hal_gpio_cfg_pin(p_uart_init->cts_pin->port, p_uart_init->cts_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED);
p_instance->PSELCTS = p_uart_init->cts_pin->pin;
p_instance->PSELRTS = p_uart_init->rts_pin->pin;
#if NRF52840_XXAA
p_instance->PSELCTS |= (p_uart_init->cts_pin->port << UARTE_PSEL_CTS_PORT_Pos);
p_instance->PSELRTS |= (p_uart_init->rts_pin->port << UARTE_PSEL_RTS_PORT_Pos);
#endif
p_instance->CONFIG = (UART_CONFIG_HWFC_Enabled << UART_CONFIG_HWFC_Pos);
}
p_instance->BAUDRATE = (hal_uart_baudrate_lookup[p_uart_init->baud_rate]);
p_instance->ENABLE = (UART_ENABLE_ENABLE_Enabled << UART_ENABLE_ENABLE_Pos);
p_instance->EVENTS_TXDRDY = 0;
p_instance->EVENTS_RXDRDY = 0;
p_instance->TASKS_STARTTX = 1;
p_instance->TASKS_STARTRX = 1;
}
#endif // HAL_UART_MODULE_ENABLED
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