Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

hal/i2c_api.h@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2015 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #ifndef MBED_I2C_API_H
<> 144:ef7eb2e8f9f7 17 #define MBED_I2C_API_H
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #include "device.h"
<> 144:ef7eb2e8f9f7 20 #include "buffer.h"
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 #if DEVICE_I2C_ASYNCH
<> 144:ef7eb2e8f9f7 23 #include "dma_api.h"
<> 144:ef7eb2e8f9f7 24 #endif
<> 144:ef7eb2e8f9f7 25
<> 144:ef7eb2e8f9f7 26 #if DEVICE_I2C
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 /**
<> 144:ef7eb2e8f9f7 29 * @defgroup hal_I2CEvents I2C Events Macros
<> 144:ef7eb2e8f9f7 30 *
<> 144:ef7eb2e8f9f7 31 * @{
<> 144:ef7eb2e8f9f7 32 */
<> 144:ef7eb2e8f9f7 33 #define I2C_EVENT_ERROR (1 << 1)
<> 144:ef7eb2e8f9f7 34 #define I2C_EVENT_ERROR_NO_SLAVE (1 << 2)
<> 144:ef7eb2e8f9f7 35 #define I2C_EVENT_TRANSFER_COMPLETE (1 << 3)
<> 144:ef7eb2e8f9f7 36 #define I2C_EVENT_TRANSFER_EARLY_NACK (1 << 4)
<> 144:ef7eb2e8f9f7 37 #define I2C_EVENT_ALL (I2C_EVENT_ERROR | I2C_EVENT_TRANSFER_COMPLETE | I2C_EVENT_ERROR_NO_SLAVE | I2C_EVENT_TRANSFER_EARLY_NACK)
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 /**@}*/
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 #if DEVICE_I2C_ASYNCH
<> 144:ef7eb2e8f9f7 42 /** Asynch I2C HAL structure
<> 144:ef7eb2e8f9f7 43 */
<> 144:ef7eb2e8f9f7 44 typedef struct {
<> 144:ef7eb2e8f9f7 45 struct i2c_s i2c; /**< Target specific I2C structure */
<> 144:ef7eb2e8f9f7 46 struct buffer_s tx_buff; /**< Tx buffer */
<> 144:ef7eb2e8f9f7 47 struct buffer_s rx_buff; /**< Rx buffer */
<> 144:ef7eb2e8f9f7 48 } i2c_t;
<> 144:ef7eb2e8f9f7 49
<> 144:ef7eb2e8f9f7 50 #else
<> 144:ef7eb2e8f9f7 51 /** Non-asynch I2C HAL structure
<> 144:ef7eb2e8f9f7 52 */
<> 144:ef7eb2e8f9f7 53 typedef struct i2c_s i2c_t;
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 #endif
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 enum {
<> 144:ef7eb2e8f9f7 58 I2C_ERROR_NO_SLAVE = -1,
<> 144:ef7eb2e8f9f7 59 I2C_ERROR_BUS_BUSY = -2
<> 144:ef7eb2e8f9f7 60 };
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 63 extern "C" {
<> 144:ef7eb2e8f9f7 64 #endif
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 /**
<> 144:ef7eb2e8f9f7 67 * \defgroup hal_GeneralI2C I2C Configuration Functions
<> 144:ef7eb2e8f9f7 68 * @{
<> 144:ef7eb2e8f9f7 69 */
<> 144:ef7eb2e8f9f7 70
<> 144:ef7eb2e8f9f7 71 /** Initialize the I2C peripheral. It sets the default parameters for I2C
<> 144:ef7eb2e8f9f7 72 * peripheral, and configures its specifieds pins.
<> 144:ef7eb2e8f9f7 73 *
<> 144:ef7eb2e8f9f7 74 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 75 * @param sda The sda pin
<> 144:ef7eb2e8f9f7 76 * @param scl The scl pin
<> 144:ef7eb2e8f9f7 77 */
<> 144:ef7eb2e8f9f7 78 void i2c_init(i2c_t *obj, PinName sda, PinName scl);
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80 /** Configure the I2C frequency
<> 144:ef7eb2e8f9f7 81 *
<> 144:ef7eb2e8f9f7 82 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 83 * @param hz Frequency in Hz
<> 144:ef7eb2e8f9f7 84 */
<> 144:ef7eb2e8f9f7 85 void i2c_frequency(i2c_t *obj, int hz);
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 /** Send START command
<> 144:ef7eb2e8f9f7 88 *
<> 144:ef7eb2e8f9f7 89 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 90 */
<> 144:ef7eb2e8f9f7 91 int i2c_start(i2c_t *obj);
<> 144:ef7eb2e8f9f7 92
<> 144:ef7eb2e8f9f7 93 /** Send STOP command
<> 144:ef7eb2e8f9f7 94 *
<> 144:ef7eb2e8f9f7 95 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 96 */
<> 144:ef7eb2e8f9f7 97 int i2c_stop(i2c_t *obj);
<> 144:ef7eb2e8f9f7 98
<> 144:ef7eb2e8f9f7 99 /** Blocking reading data
<> 144:ef7eb2e8f9f7 100 *
<> 144:ef7eb2e8f9f7 101 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 102 * @param address 7-bit address (last bit is 1)
<> 144:ef7eb2e8f9f7 103 * @param data The buffer for receiving
<> 144:ef7eb2e8f9f7 104 * @param length Number of bytes to read
<> 144:ef7eb2e8f9f7 105 * @param stop Stop to be generated after the transfer is done
<> 144:ef7eb2e8f9f7 106 * @return Number of read bytes
<> 144:ef7eb2e8f9f7 107 */
<> 144:ef7eb2e8f9f7 108 int i2c_read(i2c_t *obj, int address, char *data, int length, int stop);
<> 144:ef7eb2e8f9f7 109
<> 144:ef7eb2e8f9f7 110 /** Blocking sending data
<> 144:ef7eb2e8f9f7 111 *
<> 144:ef7eb2e8f9f7 112 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 113 * @param address 7-bit address (last bit is 0)
<> 144:ef7eb2e8f9f7 114 * @param data The buffer for sending
<> 144:ef7eb2e8f9f7 115 * @param length Number of bytes to write
<> 144:ef7eb2e8f9f7 116 * @param stop Stop to be generated after the transfer is done
<> 144:ef7eb2e8f9f7 117 * @return Number of written bytes
<> 144:ef7eb2e8f9f7 118 */
<> 144:ef7eb2e8f9f7 119 int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop);
<> 144:ef7eb2e8f9f7 120
<> 144:ef7eb2e8f9f7 121 /** Reset I2C peripheral. TODO: The action here. Most of the implementation sends stop()
<> 144:ef7eb2e8f9f7 122 *
<> 144:ef7eb2e8f9f7 123 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 124 */
<> 144:ef7eb2e8f9f7 125 void i2c_reset(i2c_t *obj);
<> 144:ef7eb2e8f9f7 126
<> 144:ef7eb2e8f9f7 127 /** Read one byte
<> 144:ef7eb2e8f9f7 128 *
<> 144:ef7eb2e8f9f7 129 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 130 * @param last Acknoledge
<> 144:ef7eb2e8f9f7 131 * @return The read byte
<> 144:ef7eb2e8f9f7 132 */
<> 144:ef7eb2e8f9f7 133 int i2c_byte_read(i2c_t *obj, int last);
<> 144:ef7eb2e8f9f7 134
<> 144:ef7eb2e8f9f7 135 /** Write one byte
<> 144:ef7eb2e8f9f7 136 *
<> 144:ef7eb2e8f9f7 137 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 138 * @param data Byte to be written
<> 144:ef7eb2e8f9f7 139 * @return 0 if NAK was received, 1 if ACK was received, 2 for timeout.
<> 144:ef7eb2e8f9f7 140 */
<> 144:ef7eb2e8f9f7 141 int i2c_byte_write(i2c_t *obj, int data);
<> 144:ef7eb2e8f9f7 142
<> 144:ef7eb2e8f9f7 143 /**@}*/
<> 144:ef7eb2e8f9f7 144
<> 144:ef7eb2e8f9f7 145 #if DEVICE_I2CSLAVE
<> 144:ef7eb2e8f9f7 146
<> 144:ef7eb2e8f9f7 147 /**
<> 144:ef7eb2e8f9f7 148 * \defgroup SynchI2C Synchronous I2C Hardware Abstraction Layer for slave
<> 144:ef7eb2e8f9f7 149 * @{
<> 144:ef7eb2e8f9f7 150 */
<> 144:ef7eb2e8f9f7 151
<> 144:ef7eb2e8f9f7 152 /** Configure I2C as slave or master.
<> 144:ef7eb2e8f9f7 153 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 154 * @return non-zero if a value is available
<> 144:ef7eb2e8f9f7 155 */
<> 144:ef7eb2e8f9f7 156 void i2c_slave_mode(i2c_t *obj, int enable_slave);
<> 144:ef7eb2e8f9f7 157
<> 144:ef7eb2e8f9f7 158 /** Check to see if the I2C slave has been addressed.
<> 144:ef7eb2e8f9f7 159 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 160 * @return The status - 1 - read addresses, 2 - write to all slaves,
<> 144:ef7eb2e8f9f7 161 * 3 write addressed, 0 - the slave has not been addressed
<> 144:ef7eb2e8f9f7 162 */
<> 144:ef7eb2e8f9f7 163 int i2c_slave_receive(i2c_t *obj);
<> 144:ef7eb2e8f9f7 164
<> 144:ef7eb2e8f9f7 165 /** Configure I2C as slave or master.
<> 144:ef7eb2e8f9f7 166 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 167 * @return non-zero if a value is available
<> 144:ef7eb2e8f9f7 168 */
<> 144:ef7eb2e8f9f7 169 int i2c_slave_read(i2c_t *obj, char *data, int length);
<> 144:ef7eb2e8f9f7 170
<> 144:ef7eb2e8f9f7 171 /** Configure I2C as slave or master.
<> 144:ef7eb2e8f9f7 172 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 173 * @return non-zero if a value is available
<> 144:ef7eb2e8f9f7 174 */
<> 144:ef7eb2e8f9f7 175 int i2c_slave_write(i2c_t *obj, const char *data, int length);
<> 144:ef7eb2e8f9f7 176
<> 144:ef7eb2e8f9f7 177 /** Configure I2C address.
<> 144:ef7eb2e8f9f7 178 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 179 * @param idx Currently not used
<> 144:ef7eb2e8f9f7 180 * @param address The address to be set
<> 144:ef7eb2e8f9f7 181 * @param mask Currently not used
<> 144:ef7eb2e8f9f7 182 */
<> 144:ef7eb2e8f9f7 183 void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask);
<> 144:ef7eb2e8f9f7 184
<> 144:ef7eb2e8f9f7 185 #endif
<> 144:ef7eb2e8f9f7 186
<> 144:ef7eb2e8f9f7 187 /**@}*/
<> 144:ef7eb2e8f9f7 188
<> 144:ef7eb2e8f9f7 189 #if DEVICE_I2C_ASYNCH
<> 144:ef7eb2e8f9f7 190
<> 144:ef7eb2e8f9f7 191 /**
<> 144:ef7eb2e8f9f7 192 * \defgroup hal_AsynchI2C Asynchronous I2C Hardware Abstraction Layer
<> 144:ef7eb2e8f9f7 193 * @{
<> 144:ef7eb2e8f9f7 194 */
<> 144:ef7eb2e8f9f7 195
<> 144:ef7eb2e8f9f7 196 /** Start I2C asynchronous transfer
<> 144:ef7eb2e8f9f7 197 *
<> 144:ef7eb2e8f9f7 198 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 199 * @param tx The transmit buffer
<> 144:ef7eb2e8f9f7 200 * @param tx_length The number of bytes to transmit
<> 144:ef7eb2e8f9f7 201 * @param rx The receive buffer
<> 144:ef7eb2e8f9f7 202 * @param rx_length The number of bytes to receive
<> 144:ef7eb2e8f9f7 203 * @param address The address to be set - 7bit or 9bit
<> 144:ef7eb2e8f9f7 204 * @param stop If true, stop will be generated after the transfer is done
<> 144:ef7eb2e8f9f7 205 * @param handler The I2C IRQ handler to be set
<> 144:ef7eb2e8f9f7 206 * @param hint DMA hint usage
<> 144:ef7eb2e8f9f7 207 */
<> 144:ef7eb2e8f9f7 208 void i2c_transfer_asynch(i2c_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t address, uint32_t stop, uint32_t handler, uint32_t event, DMAUsage hint);
<> 144:ef7eb2e8f9f7 209
<> 144:ef7eb2e8f9f7 210 /** The asynchronous IRQ handler
<> 144:ef7eb2e8f9f7 211 *
<> 144:ef7eb2e8f9f7 212 * @param obj The I2C object which holds the transfer information
<> 144:ef7eb2e8f9f7 213 * @return Event flags if a transfer termination condition was met, otherwise return 0.
<> 144:ef7eb2e8f9f7 214 */
<> 144:ef7eb2e8f9f7 215 uint32_t i2c_irq_handler_asynch(i2c_t *obj);
<> 144:ef7eb2e8f9f7 216
<> 144:ef7eb2e8f9f7 217 /** Attempts to determine if the I2C peripheral is already in use
<> 144:ef7eb2e8f9f7 218 *
<> 144:ef7eb2e8f9f7 219 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 220 * @return Non-zero if the I2C module is active or zero if it is not
<> 144:ef7eb2e8f9f7 221 */
<> 144:ef7eb2e8f9f7 222 uint8_t i2c_active(i2c_t *obj);
<> 144:ef7eb2e8f9f7 223
<> 144:ef7eb2e8f9f7 224 /** Abort asynchronous transfer
<> 144:ef7eb2e8f9f7 225 *
<> 144:ef7eb2e8f9f7 226 * This function does not perform any check - that should happen in upper layers.
<> 144:ef7eb2e8f9f7 227 * @param obj The I2C object
<> 144:ef7eb2e8f9f7 228 */
<> 144:ef7eb2e8f9f7 229 void i2c_abort_asynch(i2c_t *obj);
<> 144:ef7eb2e8f9f7 230
<> 144:ef7eb2e8f9f7 231 #endif
<> 144:ef7eb2e8f9f7 232
<> 144:ef7eb2e8f9f7 233 /**@}*/
<> 144:ef7eb2e8f9f7 234
<> 144:ef7eb2e8f9f7 235 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 236 }
<> 144:ef7eb2e8f9f7 237 #endif
<> 144:ef7eb2e8f9f7 238
<> 144:ef7eb2e8f9f7 239 #endif
<> 144:ef7eb2e8f9f7 240
<> 144:ef7eb2e8f9f7 241 #endif