mirror of https://github.com/ARMmbed/mbed-os.git
372 lines
9.8 KiB
C
372 lines
9.8 KiB
C
/* mbed Microcontroller Library
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* (C)Copyright TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION 2018 All rights reserved
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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 <string.h>
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#include "serial_api.h"
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#include "pinmap.h"
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#include "mbed_error.h"
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#include "gpio_include.h"
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#include "objects.h"
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static const PinMap PinMap_UART_TX[] = {
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{PA1, SERIAL_0, PIN_DATA(1, 1)},
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{PJ2, SERIAL_1, PIN_DATA(2, 1)},
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{PL1, SERIAL_2, PIN_DATA(2, 1)},
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{NC, NC, 0}
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};
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static const PinMap PinMap_UART_RX[] = {
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{PA2, SERIAL_0, PIN_DATA(1, 0)},
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{PJ1, SERIAL_1, PIN_DATA(2, 0)},
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{PL0, SERIAL_2, PIN_DATA(2, 0)},
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{NC, NC, 0}
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};
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static uint32_t serial_irq_ids[UART_NUM] = {0};
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static uart_irq_handler irq_handler;
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int stdio_uart_inited = 0;
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serial_t stdio_uart;
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static void uart_init(TSB_UART_TypeDef *UARTx, uart_inittypedef_t *InitStruct);
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static void uart_get_boudrate_setting(uart_boudrate_t *brddiviser, uint32_t boudrate);
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static void uart_swreset(TSB_UART_TypeDef *UARTx);
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void serial_init(serial_t *obj, PinName tx, PinName rx)
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{
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int is_stdio_uart = 0;
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UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
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UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
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UARTName uart_name = (UARTName)pinmap_merge(uart_tx, uart_rx);
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MBED_ASSERT((int)uart_name != NC);
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obj->index = uart_name;
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switch (uart_name) {
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case SERIAL_0:
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obj->UARTx = TSB_UART0;
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TSB_CG_FSYSENA_IPENA23 = ENABLE;
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TSB_CG_FSYSENA_IPENA00 = ENABLE;
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break;
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case SERIAL_1:
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obj->UARTx = TSB_UART1;
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TSB_CG_FSYSENA_IPENA24 = ENABLE;
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TSB_CG_FSYSENA_IPENA08 = ENABLE;
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TSB_CG_FSYSENA_IPENA09 = ENABLE;
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break;
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case SERIAL_2:
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obj->UARTx = TSB_UART2;
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TSB_CG_FSYSENA_IPENA25 = ENABLE;
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TSB_CG_FSYSENA_IPENA10 = ENABLE;
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break;
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default:
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error("UART is not available");
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break;
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}
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pinmap_pinout(tx, PinMap_UART_TX);
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pinmap_pinout(rx, PinMap_UART_RX);
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if (tx != NC && rx != NC) {
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obj->uart_config.Mode = UART_ENABLE_RX | UART_ENABLE_TX;
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} else {
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if (tx != NC) {
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obj->uart_config.Mode = UART_ENABLE_TX;
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} else {
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if (rx != NC) {
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obj->uart_config.Mode = UART_ENABLE_RX;
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}
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}
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}
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obj->uart_config.BaudRate = 9600;
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obj->uart_config.DataBits = 8;
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obj->uart_config.StopBits = 0;
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obj->uart_config.Parity = ParityNone;
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obj->uart_config.FlowCtrl = FlowControlNone;
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uart_init(obj->UARTx, &obj->uart_config);
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is_stdio_uart = (uart_name == STDIO_UART) ? (1) : (0);
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if (is_stdio_uart) {
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stdio_uart_inited = 1;
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memcpy(&stdio_uart, obj, sizeof(serial_t));
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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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obj->UARTx->TRANS = 0;
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obj->UARTx->CR0 = 0;
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obj->UARTx->CR1 = 0;
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uart_swreset(obj->UARTx);
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obj->uart_config.BaudRate = 0;
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obj->uart_config.DataBits = 0;
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obj->uart_config.StopBits = 0;
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obj->uart_config.Parity = 0;
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obj->uart_config.Mode = 0;
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obj->uart_config.FlowCtrl = 0;
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}
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void serial_baud(serial_t *obj, int baudrate)
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{
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obj->uart_config.BaudRate = baudrate;
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uart_init(obj->UARTx, &obj->uart_config);
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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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MBED_ASSERT((stop_bits == 1) || (stop_bits == 2)); // 0: 1 stop bits, 1: 2 stop bits
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MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven));
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MBED_ASSERT((data_bits > 6) && (data_bits < 10)); // 0: 7 data bits ... 2: 9 data bits
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obj->uart_config.DataBits = data_bits;
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obj->uart_config.StopBits = stop_bits;
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obj->uart_config.Parity = parity;
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uart_init(obj->UARTx, &obj->uart_config);
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}
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void INTUART0TX_IRQHandler(void)
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{
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irq_handler(serial_irq_ids[SERIAL_0], TxIrq);
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}
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void INTUART0RX_IRQHandler(void)
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{
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irq_handler(serial_irq_ids[SERIAL_0], RxIrq);
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}
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void INTUART1TX_IRQHandler(void)
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{
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irq_handler(serial_irq_ids[SERIAL_1], TxIrq);
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}
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void INTUART1RX_IRQHandler(void)
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{
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irq_handler(serial_irq_ids[SERIAL_1], RxIrq);
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}
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void INTUART2TX_IRQHandler(void)
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{
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irq_handler(serial_irq_ids[SERIAL_2], TxIrq);
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}
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void INTUART2RX_IRQHandler(void)
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{
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irq_handler(serial_irq_ids[SERIAL_2], RxIrq);
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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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irq_handler = handler;
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serial_irq_ids[obj->index] = id;
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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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IRQn_Type irq_n = (IRQn_Type)0;
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switch (obj->index) {
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case SERIAL_0:
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if (irq == RxIrq) {
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irq_n = INTUART0RX_IRQn;
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} else {
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irq_n = INTUART0TX_IRQn;
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}
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break;
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case SERIAL_1:
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if (irq == RxIrq) {
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irq_n = INTUART1RX_IRQn;
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} else {
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irq_n = INTUART1TX_IRQn;
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}
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break;
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case SERIAL_2:
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if (irq == RxIrq) {
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irq_n = INTUART2RX_IRQn;
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} else {
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irq_n = INTUART2TX_IRQn;
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}
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break;
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default:
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break;
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}
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NVIC_ClearPendingIRQ(irq_n);
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if (enable) {
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NVIC_EnableIRQ(irq_n);
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} else {
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NVIC_DisableIRQ(irq_n);
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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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int data = 0;
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while (!serial_readable(obj)) { // Wait until Rx buffer is full
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// Do nothing
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}
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if (obj->uart_config.Mode & UART_ENABLE_TX) {
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obj->UARTx->TRANS &= 0x0D;
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}
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data = data | (obj->UARTx->DR & 0xFFU);
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if (obj->uart_config.Mode & UART_ENABLE_TX) {
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obj->UARTx->TRANS |= UART_ENABLE_TX;
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}
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return data;
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}
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void serial_putc(serial_t *obj, int c)
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{
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while (!serial_writable(obj)) {
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// Do nothing
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}
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if (obj->uart_config.Mode & UART_ENABLE_RX) {
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obj->UARTx->TRANS &= 0x0E;
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}
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obj->UARTx->DR = c & 0xFFU;
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if (obj->uart_config.Mode & UART_ENABLE_RX) {
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obj->UARTx->TRANS |= UART_ENABLE_RX;
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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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int ret = 0;
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if ((obj->UARTx->SR & 0x0000000F) != 0) {
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ret = 1;
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}
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return ret;
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}
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int serial_writable(serial_t *obj)
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{
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int ret = 0;
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if ((obj->UARTx->SR & 0x8000) == 0) {
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ret = 1;
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}
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return ret;
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}
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void serial_clear(serial_t *obj)
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{
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obj->UARTx->FIFOCLR = 0x03;
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}
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void serial_pinout_tx(PinName tx)
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{
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pinmap_pinout(tx, PinMap_UART_TX);
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}
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void serial_break_set(serial_t *obj)
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{
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obj->UARTx->TRANS |= 0x08;
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}
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void serial_break_clear(serial_t *obj)
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{
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obj->UARTx->TRANS &= ~(0x08);
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}
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static void uart_swreset(TSB_UART_TypeDef *UARTx)
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{
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while (((UARTx->SWRST) & UARTxSWRST_SWRSTF_MASK) == UARTxSWRST_SWRSTF_RUN) {
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// No process
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}
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UARTx->SWRST = UARTxSWRST_SWRST_10;
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UARTx->SWRST = UARTxSWRST_SWRST_01;
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while (((UARTx->SWRST) & UARTxSWRST_SWRSTF_MASK) == UARTxSWRST_SWRSTF_RUN) {
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// No process
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}
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}
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static void uart_get_boudrate_setting(uart_boudrate_t *brddiviser, uint32_t boudrate)
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{
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uint32_t clock = 0;
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uint32_t k = 0;
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uint64_t tx = 0;
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uint64_t work = 1;
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uint64_t p_range64 = 0;
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uint64_t boud64 = 0;
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uint64_t tx64 = 0;
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uint64_t work64 = 1;
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SystemCoreClockUpdate(); // Get the peripheral I/O clock frequency
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clock = SystemCoreClock;
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tx = (uint64_t)((uint64_t)clock << 6);
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tx /= work;
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tx64 = (uint64_t)((uint64_t)clock << 8);
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tx64 /= work64;
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work = ((uint64_t)boudrate);
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tx /= work;
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tx >>= 4;
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boud64 = (64U * boudrate);
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p_range64 = ((boud64 / 100) * 3);
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for (k = UART_RANGE_K_MIN; (k <= UART_RANGE_K_MAX); k++) {
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work = tx + k;
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if (work >= (uint64_t)((uint64_t)1 << 6)) {
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work -= (uint64_t)((uint64_t)1 << 6);
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work >>= 6;
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if ((UART_RANGE_N_MIN <= (uint32_t)work) && ((uint32_t)work <= UART_RANGE_N_MAX)) {
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work64 = work <<6;
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work64 = (uint64_t)(work64 + (64 - (uint64_t)k));
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work64 = (tx64 / work64);
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if (((boud64 - p_range64) <= work64) && (work64 <= (boud64 + p_range64))) {
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brddiviser->brn = work;
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brddiviser->brk = k;
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break;
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}
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}
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}
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}
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}
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static void uart_init(TSB_UART_TypeDef *UARTx, uart_inittypedef_t *InitStruct)
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{
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uart_boudrate_t UTx_brd = {0};
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uint32_t brk = 0;
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uint32_t tmp = 0;
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uint32_t parity_check = 0;
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uint32_t data_length = 0;
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UARTx->CLK = UART_PLESCALER_1; // Register Setting
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uart_get_boudrate_setting(&UTx_brd, InitStruct->BaudRate);
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UTx_brd.ken = UART_DIVISION_ENABLE;
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brk = (UTx_brd.brk << 16);
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UARTx->BRD = (UTx_brd.ken | brk | UTx_brd.brn);
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parity_check = (InitStruct->Parity == ParityOdd) ? 1 : ((InitStruct->Parity == ParityEven) ? 3 : 0);
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data_length = (InitStruct->DataBits) == 8 ? 1 : (((InitStruct->DataBits) == 7) ? 0 : 2);
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tmp = (((InitStruct->FlowCtrl) << 9) | ((InitStruct->StopBits) << 4) | (parity_check << 2) | data_length);
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UARTx->CR0 = tmp;
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UARTx->CR1 = (UART_RX_FIFO_FILL_LEVEL | UART_TX_INT_ENABLE | UART_RX_INT_ENABLE);
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UARTx->FIFOCLR = (UARTxFIFOCLR_TFCLR_CLEAR | UARTxFIFOCLR_RFCLR_CLEAR);
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UARTx->TRANS = InitStruct->Mode;
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}
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