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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 "mphalport.h"
#include "hal_uart.h"
#include "hal_irq.h"
#ifdef HAL_UARTE_MODULE_ENABLED
#include "nrf.h"
#ifndef NRF52
#error "Device not supported."
#endif
#define UART_BASE(x) ((NRF_UART_Type *)UART_BASE_POINTERS[x])
#define UART_IRQ_NUM(x) (UART_IRQ_VALUES[x])
#define TX_BUF_SIZE 1
#define RX_BUF_SIZE 1
static const uint32_t hal_uart_baudrate_lookup[] = {
UARTE_BAUDRATE_BAUDRATE_Baud1200, ///< 1200 baud.
UARTE_BAUDRATE_BAUDRATE_Baud2400, ///< 2400 baud.
UARTE_BAUDRATE_BAUDRATE_Baud4800, ///< 4800 baud.
UARTE_BAUDRATE_BAUDRATE_Baud9600, ///< 9600 baud.
UARTE_BAUDRATE_BAUDRATE_Baud14400, ///< 14400 baud.
UARTE_BAUDRATE_BAUDRATE_Baud19200, ///< 19200 baud.
UARTE_BAUDRATE_BAUDRATE_Baud28800, ///< 28800 baud.
UARTE_BAUDRATE_BAUDRATE_Baud38400, ///< 38400 baud.
UARTE_BAUDRATE_BAUDRATE_Baud57600, ///< 57600 baud.
UARTE_BAUDRATE_BAUDRATE_Baud76800, ///< 76800 baud.
UARTE_BAUDRATE_BAUDRATE_Baud115200, ///< 115200 baud.
UARTE_BAUDRATE_BAUDRATE_Baud230400, ///< 230400 baud.
UARTE_BAUDRATE_BAUDRATE_Baud250000, ///< 250000 baud.
UARTE_BAUDRATE_BAUDRATE_Baud460800, ///< 460800 baud.
UARTE_BAUDRATE_BAUDRATE_Baud921600, ///< 921600 baud.
UARTE_BAUDRATE_BAUDRATE_Baud1M, ///< 1000000 baud.
};
void nrf_sendchar(NRF_UART_Type * p_instance, int ch) {
hal_uart_char_write(p_instance, ch);
}
void hal_uart_init(NRF_UART_Type * p_instance, hal_uart_init_t const * p_uart_init) {
NRF_UARTE_Type * uarte_instance = (NRF_UARTE_Type *)p_instance;
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_pin_set(p_uart_init->tx_pin->port, p_uart_init->tx_pin->pin);
hal_gpio_cfg_pin(p_uart_init->tx_pin->port, p_uart_init->rx_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED);
uarte_instance->BAUDRATE = (hal_uart_baudrate_lookup[p_uart_init->baud_rate]);
uint32_t hwfc = (p_uart_init->flow_control)
? (UARTE_CONFIG_HWFC_Enabled << UARTE_CONFIG_HWFC_Pos)
: (UARTE_CONFIG_HWFC_Disabled << UARTE_CONFIG_HWFC_Pos);
uint32_t parity = (p_uart_init->use_parity)
? (UARTE_CONFIG_PARITY_Included << UARTE_CONFIG_PARITY_Pos)
: (UARTE_CONFIG_PARITY_Excluded << UARTE_CONFIG_PARITY_Pos);
uarte_instance->CONFIG = (uint32_t)hwfc | (uint32_t)parity;
uarte_instance->PSEL.RXD = p_uart_init->rx_pin->pin;
uarte_instance->PSEL.TXD = p_uart_init->tx_pin->pin;
#if NRF52840_XXAA
uarte_instance->PSEL.RXD |= (p_uart_init->rx_pin->port << UARTE_PSEL_RXD_PORT_Pos);
uarte_instance->PSEL.TXD |= (p_uart_init->tx_pin->port << UARTE_PSEL_TXD_PORT_Pos);
#endif
if (hwfc) {
hal_gpio_cfg_pin(p_uart_init->cts_pin->port, p_uart_init->cts_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED);
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_pin_set(p_uart_init->rts_pin->port, p_uart_init->rts_pin->pin);
uarte_instance->PSEL.RTS = p_uart_init->rts_pin->pin;
uarte_instance->PSEL.CTS = p_uart_init->cts_pin->pin;
#if NRF52840_XXAA
uarte_instance->PSEL.RTS |= (p_uart_init->rx_pin->port << UARTE_PSEL_RTS_PORT_Pos);
uarte_instance->PSEL.CTS |= (p_uart_init->rx_pin->port << UARTE_PSEL_CTS_PORT_Pos);
#endif
}
hal_irq_priority(p_uart_init->irq_num, p_uart_init->irq_priority);
hal_irq_enable(p_uart_init->irq_num);
uarte_instance->INTENSET = (UARTE_INTENSET_ENDRX_Set << UARTE_INTENSET_ENDRX_Pos);
uarte_instance->INTENSET = (UARTE_INTENSET_ENDTX_Set << UARTE_INTENSET_ENDTX_Pos);
uarte_instance->ENABLE = (UARTE_ENABLE_ENABLE_Enabled << UARTE_ENABLE_ENABLE_Pos);
uarte_instance->EVENTS_ENDTX = 0;
uarte_instance->EVENTS_ENDRX = 0;
}
hal_uart_error_t hal_uart_char_write(NRF_UART_Type * p_instance, uint8_t ch) {
NRF_UARTE_Type * uarte_instance = (NRF_UARTE_Type *)p_instance;
uarte_instance->ERRORSRC = 0;
static volatile uint8_t m_tx_buf[TX_BUF_SIZE];
(void)m_tx_buf;
uarte_instance->INTENCLR = (UARTE_INTENSET_ENDTX_Set << UARTE_INTENSET_ENDTX_Pos);
m_tx_buf[0] = ch;
uarte_instance->TXD.PTR = (uint32_t)((uint8_t *)m_tx_buf);
uarte_instance->TXD.MAXCNT = (uint32_t)sizeof(m_tx_buf);
uarte_instance->TASKS_STARTTX = 1;
while((0 == uarte_instance->EVENTS_ENDTX));
uarte_instance->EVENTS_ENDTX = 0;
uarte_instance->TASKS_STOPTX = 1;
uarte_instance->INTENSET = (UARTE_INTENSET_ENDTX_Set << UARTE_INTENSET_ENDTX_Pos);
return uarte_instance->ERRORSRC;
}
hal_uart_error_t hal_uart_char_read(NRF_UART_Type * p_instance, uint8_t * ch) {
NRF_UARTE_Type * uarte_instance = (NRF_UARTE_Type *)p_instance;
uarte_instance->ERRORSRC = 0;
static volatile uint8_t m_rx_buf[RX_BUF_SIZE];
uarte_instance->INTENCLR = (UARTE_INTENSET_ENDRX_Set << UARTE_INTENSET_ENDRX_Pos);
uarte_instance->RXD.PTR = (uint32_t)((uint8_t *)m_rx_buf);
uarte_instance->RXD.MAXCNT = (uint32_t)sizeof(m_rx_buf);
uarte_instance->TASKS_STARTRX = 1;
while ((0 == uarte_instance->EVENTS_ENDRX));
uarte_instance->EVENTS_ENDRX = 0;
uarte_instance->TASKS_STOPRX = 1;
uarte_instance->INTENSET = (UARTE_INTENSET_ENDRX_Set << UARTE_INTENSET_ENDRX_Pos);
*ch = (uint8_t)m_rx_buf[0];
return uarte_instance->ERRORSRC;
}
#endif // HAL_UARTE_MODULE_ENABLED
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