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Diff: targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/serial_api.c
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- 324:406fd2029f23
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diff -r 3e2706a32e81 -r 406fd2029f23 targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/serial_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/serial_api.c Thu Sep 18 14:00:17 2014 +0100 @@ -0,0 +1,225 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "serial_api.h" + +#if DEVICE_SERIAL + +// math.h required for floating point operations for baud rate calculation +#include <math.h> +#include "mbed_assert.h" + +#include <string.h> + +#include "cmsis.h" +#include "pinmap.h" +#include "fsl_uart_hal.h" +#include "fsl_clock_manager.h" +#include "fsl_uart_features.h" +#include "PeripheralPins.h" + +/* TODO: + putchar/getchar 9 and 10 bits support +*/ +#ifndef UART3_BASE +#define UART_NUM 3 +#else +#define UART_NUM 5 +#endif + +static uint32_t serial_irq_ids[UART_NUM] = {0}; +static uart_irq_handler irq_handler; + +int stdio_uart_inited = 0; +serial_t stdio_uart; + +void serial_init(serial_t *obj, PinName tx, PinName rx) { + uint32_t uart_tx = pinmap_peripheral(tx, PinMap_UART_TX); + uint32_t uart_rx = pinmap_peripheral(rx, PinMap_UART_RX); + obj->index = pinmap_merge(uart_tx, uart_rx); + MBED_ASSERT((int)obj->index != NC); + + uint32_t uartSourceClock = CLOCK_SYS_GetUartFreq(obj->index); + + CLOCK_SYS_EnableUartClock(obj->index); + uint32_t uart_addrs[] = UART_BASE_ADDRS; + UART_HAL_Init(uart_addrs[obj->index]); + UART_HAL_SetBaudRate(uart_addrs[obj->index], uartSourceClock, 9600); + UART_HAL_SetParityMode(uart_addrs[obj->index], kUartParityDisabled); + #if FSL_FEATURE_UART_HAS_STOP_BIT_CONFIG_SUPPORT + UART_HAL_SetStopBitCount(uart_addrs[obj->index], kUartOneStopBit); + #endif + UART_HAL_SetBitCountPerChar(uart_addrs[obj->index], kUart8BitsPerChar); + UART_HAL_EnableTransmitter(uart_addrs[obj->index]); + UART_HAL_EnableReceiver(uart_addrs[obj->index]); + + pinmap_pinout(tx, PinMap_UART_TX); + pinmap_pinout(rx, PinMap_UART_RX); + + pin_mode(tx, PullUp); + pin_mode(rx, PullUp); + + if (obj->index == STDIO_UART) { + stdio_uart_inited = 1; + memcpy(&stdio_uart, obj, sizeof(serial_t)); + } +} + +void serial_free(serial_t *obj) { + serial_irq_ids[obj->index] = 0; +} + +void serial_baud(serial_t *obj, int baudrate) { + uint32_t uart_addrs[] = UART_BASE_ADDRS; + UART_HAL_SetBaudRate(uart_addrs[obj->index], CLOCK_SYS_GetUartFreq(obj->index), (uint32_t)baudrate); +} + +void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) { + uint32_t uart_addrs[] = UART_BASE_ADDRS; + UART_HAL_SetBitCountPerChar(uart_addrs[obj->index], (uart_bit_count_per_char_t)data_bits); + UART_HAL_SetParityMode(uart_addrs[obj->index], (uart_parity_mode_t)parity); + #if FSL_FEATURE_UART_HAS_STOP_BIT_CONFIG_SUPPORT + UART_HAL_SetStopBitCount(uart_addrs[obj->index], (uart_stop_bit_count_t)stop_bits); + #endif +} + +/****************************************************************************** + * INTERRUPTS HANDLING + ******************************************************************************/ +static inline void uart_irq(uint32_t transmit_empty, uint32_t receive_full, uint32_t index) { + if (serial_irq_ids[index] != 0) { + if (transmit_empty) + irq_handler(serial_irq_ids[index], TxIrq); + + if (receive_full) + irq_handler(serial_irq_ids[index], RxIrq); + } +} + +void uart0_irq() { + uart_irq(UART_HAL_IsTxDataRegEmpty(UART0_BASE), UART_HAL_IsRxDataRegFull(UART0_BASE), 0); + if (UART_HAL_GetStatusFlag(UART0_BASE, kUartRxOverrun)) + UART_HAL_ClearStatusFlag(UART0_BASE, kUartRxOverrun); +} +void uart1_irq() { + uart_irq(UART_HAL_IsTxDataRegEmpty(UART1_BASE), UART_HAL_IsRxDataRegFull(UART1_BASE), 1); +} + +void uart2_irq() { + uart_irq(UART_HAL_IsTxDataRegEmpty(UART2_BASE), UART_HAL_IsRxDataRegFull(UART2_BASE), 2); +} + +#if (UART_NUM > 3) + +void uart3_irq() { + uart_irq(UART_HAL_IsTxDataRegEmpty(UART3_BASE), UART_HAL_IsRxDataRegFull(UART3_BASE), 3); +} + +void uart4_irq() { + uart_irq(UART_HAL_IsTxDataRegEmpty(UART4_BASE), UART_HAL_IsRxDataRegFull(UART4_BASE), 4); +} +#endif + +void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) { + irq_handler = handler; + serial_irq_ids[obj->index] = id; +} + +void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) { + IRQn_Type irq_n = (IRQn_Type)0; + uint32_t vector = 0; + + switch (obj->index) { + case 0: irq_n=UART0_RX_TX_IRQn; vector = (uint32_t)&uart0_irq; break; + case 1: irq_n=UART1_RX_TX_IRQn; vector = (uint32_t)&uart1_irq; break; + case 2: irq_n=UART2_RX_TX_IRQn; vector = (uint32_t)&uart2_irq; break; + #if (NUM_UART > 3) + case 3: irq_n=UART3_RX_TX_IRQn; vector = (uint32_t)&uart3_irq; break; + case 4: irq_n=UART4_RX_TX_IRQn; vector = (uint32_t)&uart4_irq; break; + #endif + } + uint32_t uart_addrs[] = UART_BASE_ADDRS; + if (enable) { + switch (irq) { + case RxIrq: UART_HAL_SetRxDataRegFullIntCmd(uart_addrs[obj->index], true); break; + case TxIrq: UART_HAL_SetTxDataRegEmptyIntCmd(uart_addrs[obj->index], true); break; + } + NVIC_SetVector(irq_n, vector); + NVIC_EnableIRQ(irq_n); + + } else { // disable + int all_disabled = 0; + SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq); + switch (irq) { + case RxIrq: UART_HAL_SetRxDataRegFullIntCmd(uart_addrs[obj->index], false); break; + case TxIrq: UART_HAL_SetTxDataRegEmptyIntCmd(uart_addrs[obj->index], false); break; + } + switch (other_irq) { + case RxIrq: all_disabled = UART_HAL_GetRxDataRegFullIntCmd(uart_addrs[obj->index]) == 0; break; + case TxIrq: all_disabled = UART_HAL_GetTxDataRegEmptyIntCmd(uart_addrs[obj->index]) == 0; break; + } + if (all_disabled) + NVIC_DisableIRQ(irq_n); + } +} + +int serial_getc(serial_t *obj) { + while (!serial_readable(obj)); + uint8_t data; + uint32_t uart_addrs[] = UART_BASE_ADDRS; + UART_HAL_Getchar(uart_addrs[obj->index], &data); + + return data; +} + +void serial_putc(serial_t *obj, int c) { + while (!serial_writable(obj)); + uint32_t uart_addrs[] = UART_BASE_ADDRS; + UART_HAL_Putchar(uart_addrs[obj->index], (uint8_t)c); +} + +int serial_readable(serial_t *obj) { + uint32_t uart_address[] = UART_BASE_ADDRS; + if (UART_HAL_GetStatusFlag(uart_address[obj->index], kUartRxOverrun)) + UART_HAL_ClearStatusFlag(uart_address[obj->index], kUartRxOverrun); + return UART_HAL_IsRxDataRegFull(uart_address[obj->index]); +} + +int serial_writable(serial_t *obj) { + uint32_t uart_address[] = UART_BASE_ADDRS; + if (UART_HAL_GetStatusFlag(uart_address[obj->index], kUartRxOverrun)) + UART_HAL_ClearStatusFlag(uart_address[obj->index], kUartRxOverrun); + + return UART_HAL_IsTxDataRegEmpty(uart_address[obj->index]); +} + +void serial_clear(serial_t *obj) { +} + +void serial_pinout_tx(PinName tx) { + pinmap_pinout(tx, PinMap_UART_TX); +} + +void serial_break_set(serial_t *obj) { + uint32_t uart_address[] = UART_BASE_ADDRS; + UART_HAL_SetBreakCharCmd(uart_address[obj->index], true); +} + +void serial_break_clear(serial_t *obj) { + uint32_t uart_address[] = UART_BASE_ADDRS; + UART_HAL_SetBreakCharCmd(uart_address[obj->index], false); +} + +#endif