Diff: targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/serial_api.c

Revision:

324:406fd2029f23

Child:

339:40bd4701f3e2

--- /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