mirror of https://github.com/ARMmbed/mbed-os.git
326 lines
11 KiB
C
326 lines
11 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2019, Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "hal/serial_api.h"
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#include "cyhal_uart.h"
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#include "mbed_error.h"
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#include "PeripheralPins.h"
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#include "PinNames.h"
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#if DEVICE_SERIAL
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#ifdef __cplusplus
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extern "C" {
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#endif
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int stdio_uart_inited = 0;
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serial_t stdio_uart;
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static inline struct serial_s *cy_serial_get_struct(serial_t *obj)
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{
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#if DEVICE_SERIAL_ASYNCH
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return &(obj->serial);
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#else
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return obj;
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#endif
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}
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static void serial_handler_internal(void *handler_arg, cyhal_uart_event_t event)
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{
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serial_t *obj = (serial_t *)handler_arg;
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struct serial_s *ser = cy_serial_get_struct(obj);
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#if DEVICE_SERIAL_ASYNCH
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ser->event_flags = event;
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void (*async_rx_handler)(void) = (void (*)(void))ser->async_rx_handler;
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if (NULL != async_rx_handler && (event & ser->rx_event_mask)) {
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(*async_rx_handler)();
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}
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void (*async_tx_handler)(void) = (void (*)(void))ser->async_tx_handler;
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if (NULL != async_tx_handler && (event & ser->tx_event_mask)) {
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(*async_tx_handler)();
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}
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#endif
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void (*handler)(uint32_t, int) = (void (*)(uint32_t, int))ser->handler;
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if (NULL != handler) {
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if (CYHAL_UART_IRQ_RX_NOT_EMPTY == (event & ser->rx_event_mask)) {
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(*handler)(ser->handler_arg, (int)RxIrq);
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}
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if (CYHAL_UART_IRQ_TX_EMPTY == (event & ser->tx_event_mask)) {
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(*handler)(ser->handler_arg, (int)TxIrq);
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}
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}
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}
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void serial_init(serial_t *obj, PinName tx, PinName rx)
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{
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if (tx == STDIO_UART_TX && stdio_uart_inited != 0) {
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memmove(obj, &stdio_uart, sizeof(serial_t));
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return;
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}
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memset(obj, 0, sizeof(serial_t));
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struct serial_s *ser = cy_serial_get_struct(obj);
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ser->pin_tx = tx;
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ser->pin_rx = rx;
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ser->pin_rts = NC;
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ser->pin_cts = NC;
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if (CY_RSLT_SUCCESS != cyhal_uart_init(&(ser->hal_obj), tx, rx, NULL, NULL)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_uart_init");
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}
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cyhal_uart_register_callback(&(ser->hal_obj), &serial_handler_internal, obj);
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#if DEVICE_SERIAL_ASYNCH
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static const cyhal_uart_event_t ENABLE_EVENTS = (cyhal_uart_event_t)
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(CYHAL_UART_IRQ_TX_DONE | CYHAL_UART_IRQ_TX_ERROR |
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CYHAL_UART_IRQ_RX_DONE | CYHAL_UART_IRQ_RX_ERROR);
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cyhal_uart_enable_event(&(ser->hal_obj), ENABLE_EVENTS, CYHAL_ISR_PRIORITY_DEFAULT, true);
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#endif
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if (tx == STDIO_UART_TX) {
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memmove(&stdio_uart, obj, sizeof(serial_t));
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stdio_uart_inited = 1;
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}
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}
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void serial_free(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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cyhal_uart_free(&(ser->hal_obj));
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}
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void serial_baud(serial_t *obj, int baudrate)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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if (CY_RSLT_SUCCESS != cyhal_uart_set_baud(&(ser->hal_obj), baudrate, NULL)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_FAILED_OPERATION), "serial_baud");
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}
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ser->baud = (uint32_t)baudrate;
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}
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void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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cyhal_uart_parity_t hal_parity;
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switch (parity) {
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case ParityNone:
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hal_parity = CYHAL_UART_PARITY_NONE;
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break;
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case ParityOdd:
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hal_parity = CYHAL_UART_PARITY_ODD;
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break;
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case ParityEven:
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hal_parity = CYHAL_UART_PARITY_EVEN;
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break;
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default:
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_UNSUPPORTED), "Unsupported parity");
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}
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cyhal_uart_cfg_t cfg = {
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.data_bits = data_bits,
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.stop_bits = stop_bits,
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.parity = hal_parity,
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};
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if (CY_RSLT_SUCCESS != cyhal_uart_configure(&(ser->hal_obj), &cfg)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_uart_configure");
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}
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}
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void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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ser->handler_arg = id;
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// The struct uses a different type because objects.h cannot include serial_api.h without creating a cycle
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ser->handler = (void *)handler;
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}
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void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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if (irq == RxIrq) {
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static const cyhal_uart_event_t interrupt_mask = (cyhal_uart_event_t)
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(CYHAL_UART_IRQ_RX_DONE | CYHAL_UART_IRQ_RX_ERROR | CYHAL_UART_IRQ_RX_NOT_EMPTY);
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ser->rx_event_mask = enable
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? (cyhal_uart_event_t)(ser->rx_event_mask | interrupt_mask)
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: (cyhal_uart_event_t)(ser->rx_event_mask & ~interrupt_mask);
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cyhal_uart_enable_event(&(ser->hal_obj), interrupt_mask, CYHAL_ISR_PRIORITY_DEFAULT, (bool)enable);
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} else if (irq == TxIrq) {
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static const cyhal_uart_event_t interrupt_mask = (cyhal_uart_event_t)(CYHAL_UART_IRQ_TX_DONE | CYHAL_UART_IRQ_TX_ERROR | CYHAL_UART_IRQ_TX_EMPTY);
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ser->tx_event_mask = enable
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? (cyhal_uart_event_t)(ser->tx_event_mask | interrupt_mask)
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: (cyhal_uart_event_t)(ser->tx_event_mask & ~interrupt_mask);
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cyhal_uart_enable_event(&(ser->hal_obj), interrupt_mask, CYHAL_ISR_PRIORITY_DEFAULT, (bool)enable);
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}
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}
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int serial_getc(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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uint8_t value;
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if (CY_RSLT_SUCCESS != cyhal_uart_getc(&(ser->hal_obj), &value, 0)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_READ_FAILED), "serial_getc");
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}
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return value;
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}
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void serial_putc(serial_t *obj, int c)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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if (CY_RSLT_SUCCESS != cyhal_uart_putc(&(ser->hal_obj), (uint32_t)c)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_WRITE_FAILED), "serial_putc");
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}
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}
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int serial_readable(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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return cyhal_uart_readable(&(ser->hal_obj)) > 0 ? 1 : 0;
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}
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int serial_writable(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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return cyhal_uart_writable(&(ser->hal_obj)) > 0 ? 1 : 0;
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}
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void serial_clear(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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if (CY_RSLT_SUCCESS != cyhal_uart_clear(&(ser->hal_obj))) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_WRITE_FAILED), "serial_clear");
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}
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}
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void serial_break_set(serial_t *obj)
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{
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MBED_WARNING(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_UNSUPPORTED), "serial_break_set");
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}
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void serial_break_clear(serial_t *obj)
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{
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MBED_WARNING(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_UNSUPPORTED), "serial_break_clear");
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}
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void serial_pinout_tx(PinName tx)
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{
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_UNSUPPORTED), "serial_pinout_tx");
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}
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void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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if (CY_RSLT_SUCCESS != cyhal_uart_set_flow_control(&(ser->hal_obj), txflow, rxflow)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_FAILED_OPERATION), "serial_set_flow_control");
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}
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ser->pin_rts = rxflow;
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ser->pin_cts = txflow;
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}
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const PinMap *serial_tx_pinmap(void)
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{
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return PinMap_UART_TX;
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}
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const PinMap *serial_rx_pinmap(void)
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{
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return PinMap_UART_RX;
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}
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const PinMap *serial_cts_pinmap(void)
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{
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return PinMap_UART_CTS;
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}
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const PinMap *serial_rts_pinmap(void)
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{
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return PinMap_UART_RTS;
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}
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#if DEVICE_SERIAL_ASYNCH
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int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, MBED_UNUSED uint8_t tx_width, uint32_t handler, uint32_t event, MBED_UNUSED DMAUsage dma)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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// handler calls serial_irq_handler_async
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ser->async_tx_handler = (void *)handler;
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if (CY_RSLT_SUCCESS != cyhal_uart_write_async(&(ser->hal_obj), (void *)tx, tx_length)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_WRITE_FAILED), "serial_tx_asynch");
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}
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return 0;
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}
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void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, MBED_UNUSED uint8_t rx_width, uint32_t handler, uint32_t event, uint8_t char_match, MBED_UNUSED DMAUsage dma)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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// handler calls serial_irq_handler_async
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ser->async_rx_handler = (void *)handler;
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if (CY_RSLT_SUCCESS != cyhal_uart_read_async(&(ser->hal_obj), rx, rx_length)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_WRITE_FAILED), "serial_rx_asynch");
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}
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}
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uint8_t serial_tx_active(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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return cyhal_uart_is_tx_active(&(ser->hal_obj)) ? 1 : 0;
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}
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uint8_t serial_rx_active(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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return cyhal_uart_is_rx_active(&(ser->hal_obj)) ? 1 : 0;
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}
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int serial_irq_handler_asynch(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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int flags = 0;
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if (ser->event_flags & CYHAL_UART_IRQ_TX_DONE) {
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ser->async_tx_handler = NULL;
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flags |= SERIAL_EVENT_TX_COMPLETE;
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}
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if (ser->event_flags & CYHAL_UART_IRQ_RX_DONE) {
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ser->async_rx_handler = NULL;
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flags |= SERIAL_EVENT_RX_COMPLETE;
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}
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// HAL event type does not specify which error occurred
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if (ser->event_flags & CYHAL_UART_IRQ_RX_ERROR) {
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flags |= SERIAL_EVENT_RX_FRAMING_ERROR;
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}
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return flags;
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}
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void serial_tx_abort_asynch(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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if (CY_RSLT_SUCCESS != cyhal_uart_write_abort(&(ser->hal_obj))) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_FAILED_OPERATION), "serial_tx_abort_asynch");
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}
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}
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void serial_rx_abort_asynch(serial_t *obj)
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{
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struct serial_s *ser = cy_serial_get_struct(obj);
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if (CY_RSLT_SUCCESS != cyhal_uart_read_abort(&(ser->hal_obj))) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_FAILED_OPERATION), "serial_rx_abort_asynch");
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}
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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