Diff: targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/i2c_api.c

Revision:

267:8673334f2cbe

Parent:

266:69e8a32876bd

Child:

268:402bcc0c870b

--- a/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/i2c_api.c	Thu Jul 24 12:00:06 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,331 +0,0 @@
-/* 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 "mbed_assert.h"
-#include "i2c_api.h"
-
-#include "cmsis.h"
-#include "pinmap.h"
-#include "fsl_clock_manager.h"
-#include "fsl_i2c_hal.h"
-#include "fsl_port_hal.h"
-#include "fsl_sim_hal.h"
-
-static const PinMap PinMap_I2C_SDA[] = {
-    {PTE25, I2C_0, 5},
-    {PTB1 , I2C_0, 2},
-    {PTB3 , I2C_0, 2},
-    {PTC11, I2C_1, 2},
-    {PTA13, I2C_2, 5},
-    {PTD3 , I2C_0, 7},
-    {PTE0 , I2C_1, 6},
-    {NC   , NC   , 0}
-};
-
-static const PinMap PinMap_I2C_SCL[] = {
-    {PTE24, I2C_0, 5},
-    {PTB0 , I2C_0, 2},
-    {PTB2 , I2C_0, 2},
-    {PTC10, I2C_1, 2},
-    {PTA12, I2C_2, 5},
-    {PTA14, I2C_2, 5},
-    {PTD2 , I2C_0, 7},
-    {PTE1 , I2C_1, 6},
-    {NC   , NC   , 0}
-};
-
-void i2c_init(i2c_t *obj, PinName sda, PinName scl) {
-    uint32_t i2c_sda = pinmap_peripheral(sda, PinMap_I2C_SDA);
-    uint32_t i2c_scl = pinmap_peripheral(scl, PinMap_I2C_SCL);
-    obj->instance = pinmap_merge(i2c_sda, i2c_scl);
-    MBED_ASSERT((int)obj->instance != NC);
-
-    clock_manager_set_gate(kClockModuleI2C, obj->instance, true);
-    clock_manager_set_gate(kClockModulePORT, sda >> GPIO_PORT_SHIFT, true);
-    clock_manager_set_gate(kClockModulePORT, scl >> GPIO_PORT_SHIFT, true);
-    i2c_hal_enable(obj->instance);
-    i2c_frequency(obj, 100000);
-
-    pinmap_pinout(sda, PinMap_I2C_SDA);
-    pinmap_pinout(scl, PinMap_I2C_SCL);
-    port_hal_configure_open_drain(sda >> GPIO_PORT_SHIFT, sda & 0xFF, true);
-    port_hal_configure_open_drain(scl >> GPIO_PORT_SHIFT, scl & 0xFF, true);
-}
-
-int i2c_start(i2c_t *obj) {
-    i2c_hal_send_start(obj->instance);
-    return 0;
-}
-
-int i2c_stop(i2c_t *obj) {
-    volatile uint32_t n = 0;
-    i2c_hal_send_stop(obj->instance);
-    
-    // It seems that there are timing problems
-    // when there is no waiting time after a STOP.
-    // This wait is also included on the samples
-    // code provided with the freedom board
-    for (n = 0; n < 200; n++) __NOP();
-    return 0;
-}
-
-static int timeout_status_poll(i2c_t *obj, uint32_t mask) {
-    uint32_t i, timeout = 100000;
-
-    for (i = 0; i < timeout; i++) {
-        if (HW_I2C_S_RD(obj->instance) & mask)
-            return 0;
-    }
-    return 1;
-}
-
-// this function waits the end of a tx transfer and return the status of the transaction:
-//    0: OK ack received
-//    1: OK ack not received
-//    2: failure
-static int i2c_wait_end_tx_transfer(i2c_t *obj) {
-    // wait for the interrupt flag
-    if (timeout_status_poll(obj, I2C_S_IICIF_MASK)) {
-        return 2;
-    }
-
-    i2c_hal_clear_interrupt(obj->instance);
-
-    // wait transfer complete
-    if (timeout_status_poll(obj, I2C_S_TCF_MASK)) {
-        return 2;
-    }
-
-    // check if we received the ACK or not
-    return i2c_hal_get_receive_ack(obj->instance) ? 0 : 1;
-}
-
-// this function waits the end of a rx transfer and return the status of the transaction:
-//    0: OK
-//    1: failure
-static int i2c_wait_end_rx_transfer(i2c_t *obj) {
-    // wait for the end of the rx transfer
-    if (timeout_status_poll(obj, I2C_S_IICIF_MASK)) {
-        return 1;
-    }
-
-    i2c_hal_clear_interrupt(obj->instance);
-
-    return 0;
-}
-
-static int i2c_do_write(i2c_t *obj, int value) {
-    i2c_hal_write(obj->instance, value);
-
-    // init and wait the end of the transfer
-    return i2c_wait_end_tx_transfer(obj);
-}
-
-static int i2c_do_read(i2c_t *obj, char * data, int last) {
-    if (last) {
-        i2c_hal_send_nak(obj->instance);
-    } else {
-        i2c_hal_send_ack(obj->instance);
-    }
-
-    *data = (i2c_hal_read(obj->instance) & 0xFF);
-
-    // start rx transfer and wait the end of the transfer
-    return i2c_wait_end_rx_transfer(obj);
-}
-
-void i2c_frequency(i2c_t *obj, int hz) {
-    uint32_t busClock;
-
-    clock_manager_error_code_t error = clock_manager_get_frequency(kBusClock, &busClock);
-    if (error == kClockManagerSuccess) {
-        i2c_hal_set_baud(obj->instance, busClock, hz / 1000, NULL);
-    }
-}
-
-int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
-    int count;
-    char dummy_read, *ptr;
-
-    if (i2c_start(obj)) {
-        i2c_stop(obj);
-        return I2C_ERROR_BUS_BUSY;
-    }
-
-    if (i2c_do_write(obj, (address | 0x01))) {
-        i2c_stop(obj);
-        return I2C_ERROR_NO_SLAVE;
-    }
-
-    // set rx mode
-    i2c_hal_set_direction(obj->instance, kI2CReceive);
-
-    // Read in bytes
-    for (count = 0; count < (length); count++) {
-        ptr = (count == 0) ? &dummy_read : &data[count - 1];
-        uint8_t stop_ = (count == (length - 1)) ? 1 : 0;
-        if (i2c_do_read(obj, ptr, stop_)) {
-            i2c_stop(obj);
-            return count;
-        }
-    }
-
-    // If not repeated start, send stop.
-    if (stop)
-        i2c_stop(obj);
-
-    // last read
-    data[count-1] = i2c_hal_read(obj->instance);
-
-    return length;
-}
-
-int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
-    int i;
-
-    if (i2c_start(obj)) {
-        i2c_stop(obj);
-        return I2C_ERROR_BUS_BUSY;
-    }
-
-    if (i2c_do_write(obj, (address & 0xFE))) {
-        i2c_stop(obj);
-        return I2C_ERROR_NO_SLAVE;
-    }
-
-    for (i = 0; i < length; i++) {
-        if(i2c_do_write(obj, data[i])) {
-            i2c_stop(obj);
-            return i;
-        }
-    }
-
-    if (stop)
-        i2c_stop(obj);
-
-    return length;
-}
-
-void i2c_reset(i2c_t *obj) {
-    i2c_stop(obj);
-}
-
-int i2c_byte_read(i2c_t *obj, int last) {
-    char data;
-
-    // set rx mode
-    i2c_hal_set_direction(obj->instance, kI2CReceive);
-
-    // Setup read
-    i2c_do_read(obj, &data, last);
-
-    // set tx mode
-    i2c_hal_set_direction(obj->instance, kI2CTransmit);
-    return i2c_hal_read(obj->instance);
-}
-
-int i2c_byte_write(i2c_t *obj, int data) {
-    // set tx mode
-    i2c_hal_set_direction(obj->instance, kI2CTransmit);
-
-    return !i2c_do_write(obj, (data & 0xFF));
-}
-
-
-#if DEVICE_I2CSLAVE
-void i2c_slave_mode(i2c_t *obj, int enable_slave) {
-    if (enable_slave) {
-        // set slave mode
-        BW_I2C_C1_MST(obj->instance, 0);
-        i2c_hal_enable_interrupt(obj->instance);
-    } else {
-        // set master mode
-        BW_I2C_C1_MST(obj->instance, 1);
-    }
-}
-
-int i2c_slave_receive(i2c_t *obj) {
-    switch(HW_I2C_S_RD(obj->instance)) {
-        // read addressed
-        case 0xE6:
-            return 1;
-        // write addressed
-        case 0xE2:
-            return 3;
-        default:
-            return 0;
-    }
-}
-
-int i2c_slave_read(i2c_t *obj, char *data, int length) {
-    uint8_t dummy_read;
-    uint8_t *ptr;
-    int count;
-
-    // set rx mode
-    i2c_hal_set_direction(obj->instance, kI2CTransmit);
-
-    // first dummy read
-    dummy_read = i2c_hal_read(obj->instance);
-    if (i2c_wait_end_rx_transfer(obj))
-        return 0;
-
-    // read address
-    dummy_read = i2c_hal_read(obj->instance);
-    if (i2c_wait_end_rx_transfer(obj))
-        return 0;
-
-    // read (length - 1) bytes
-    for (count = 0; count < (length - 1); count++) {
-        data[count] = i2c_hal_read(obj->instance);
-        if (i2c_wait_end_rx_transfer(obj))
-            return count;
-    }
-
-    // read last byte
-    ptr = (length == 0) ? &dummy_read : (uint8_t *)&data[count];
-    *ptr = i2c_hal_read(obj->instance);
-
-    return (length) ? (count + 1) : 0;
-}
-
-int i2c_slave_write(i2c_t *obj, const char *data, int length) {
-    int i, count = 0;
-
-    // set tx mode
-    i2c_hal_set_direction(obj->instance, kI2CTransmit);
-
-    for (i = 0; i < length; i++) {
-        if (i2c_do_write(obj, data[count++]) == 2)
-            return i;
-    }
-
-    // set rx mode
-    i2c_hal_set_direction(obj->instance, kI2CReceive);
-
-    // dummy rx transfer needed
-    // otherwise the master cannot generate a stop bit
-    i2c_hal_read(obj->instance);
-    if (i2c_wait_end_rx_transfer(obj) == 2)
-        return count;
-
-    return count;
-}
-
-void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask) {
-    i2c_hal_set_upper_slave_address_7bit(obj->instance, address & 0xfe);
-}
-#endif
-