fix nrf51822 i2c & spi conflict

Dependencies:   BLE_API eMPL_MPU6050 nRF51822

Fork of Seeed_Tiny_BLE_Flash by Darren Huang

Committer:
yihui
Date:
Tue Nov 17 07:48:56 2015 +0000
Revision:
5:b8c02645e6af
fix i2c & spi conflict

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 5:b8c02645e6af 1 /* mbed Microcontroller Library
yihui 5:b8c02645e6af 2 * Copyright (c) 2006-2013 ARM Limited
yihui 5:b8c02645e6af 3 *
yihui 5:b8c02645e6af 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 5:b8c02645e6af 5 * you may not use this file except in compliance with the License.
yihui 5:b8c02645e6af 6 * You may obtain a copy of the License at
yihui 5:b8c02645e6af 7 *
yihui 5:b8c02645e6af 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 5:b8c02645e6af 9 *
yihui 5:b8c02645e6af 10 * Unless required by applicable law or agreed to in writing, software
yihui 5:b8c02645e6af 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 5:b8c02645e6af 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 5:b8c02645e6af 13 * See the License for the specific language governing permissions and
yihui 5:b8c02645e6af 14 * limitations under the License.
yihui 5:b8c02645e6af 15 */
yihui 5:b8c02645e6af 16 #ifndef MBED_I2C_SLAVE_H
yihui 5:b8c02645e6af 17 #define MBED_I2C_SLAVE_H
yihui 5:b8c02645e6af 18
yihui 5:b8c02645e6af 19 #include "platform.h"
yihui 5:b8c02645e6af 20
yihui 5:b8c02645e6af 21 #if DEVICE_I2CSLAVE
yihui 5:b8c02645e6af 22
yihui 5:b8c02645e6af 23 #include "i2c_api.h"
yihui 5:b8c02645e6af 24
yihui 5:b8c02645e6af 25 namespace mbed {
yihui 5:b8c02645e6af 26
yihui 5:b8c02645e6af 27 /** An I2C Slave, used for communicating with an I2C Master device
yihui 5:b8c02645e6af 28 *
yihui 5:b8c02645e6af 29 * Example:
yihui 5:b8c02645e6af 30 * @code
yihui 5:b8c02645e6af 31 * // Simple I2C responder
yihui 5:b8c02645e6af 32 * #include <mbed.h>
yihui 5:b8c02645e6af 33 *
yihui 5:b8c02645e6af 34 * I2CSlave slave(p9, p10);
yihui 5:b8c02645e6af 35 *
yihui 5:b8c02645e6af 36 * int main() {
yihui 5:b8c02645e6af 37 * char buf[10];
yihui 5:b8c02645e6af 38 * char msg[] = "Slave!";
yihui 5:b8c02645e6af 39 *
yihui 5:b8c02645e6af 40 * slave.address(0xA0);
yihui 5:b8c02645e6af 41 * while (1) {
yihui 5:b8c02645e6af 42 * int i = slave.receive();
yihui 5:b8c02645e6af 43 * switch (i) {
yihui 5:b8c02645e6af 44 * case I2CSlave::ReadAddressed:
yihui 5:b8c02645e6af 45 * slave.write(msg, strlen(msg) + 1); // Includes null char
yihui 5:b8c02645e6af 46 * break;
yihui 5:b8c02645e6af 47 * case I2CSlave::WriteGeneral:
yihui 5:b8c02645e6af 48 * slave.read(buf, 10);
yihui 5:b8c02645e6af 49 * printf("Read G: %s\n", buf);
yihui 5:b8c02645e6af 50 * break;
yihui 5:b8c02645e6af 51 * case I2CSlave::WriteAddressed:
yihui 5:b8c02645e6af 52 * slave.read(buf, 10);
yihui 5:b8c02645e6af 53 * printf("Read A: %s\n", buf);
yihui 5:b8c02645e6af 54 * break;
yihui 5:b8c02645e6af 55 * }
yihui 5:b8c02645e6af 56 * for(int i = 0; i < 10; i++) buf[i] = 0; // Clear buffer
yihui 5:b8c02645e6af 57 * }
yihui 5:b8c02645e6af 58 * }
yihui 5:b8c02645e6af 59 * @endcode
yihui 5:b8c02645e6af 60 */
yihui 5:b8c02645e6af 61 class I2CSlave {
yihui 5:b8c02645e6af 62
yihui 5:b8c02645e6af 63 public:
yihui 5:b8c02645e6af 64 enum RxStatus {
yihui 5:b8c02645e6af 65 NoData = 0,
yihui 5:b8c02645e6af 66 ReadAddressed = 1,
yihui 5:b8c02645e6af 67 WriteGeneral = 2,
yihui 5:b8c02645e6af 68 WriteAddressed = 3
yihui 5:b8c02645e6af 69 };
yihui 5:b8c02645e6af 70
yihui 5:b8c02645e6af 71 /** Create an I2C Slave interface, connected to the specified pins.
yihui 5:b8c02645e6af 72 *
yihui 5:b8c02645e6af 73 * @param sda I2C data line pin
yihui 5:b8c02645e6af 74 * @param scl I2C clock line pin
yihui 5:b8c02645e6af 75 */
yihui 5:b8c02645e6af 76 I2CSlave(PinName sda, PinName scl);
yihui 5:b8c02645e6af 77
yihui 5:b8c02645e6af 78 /** Set the frequency of the I2C interface
yihui 5:b8c02645e6af 79 *
yihui 5:b8c02645e6af 80 * @param hz The bus frequency in hertz
yihui 5:b8c02645e6af 81 */
yihui 5:b8c02645e6af 82 void frequency(int hz);
yihui 5:b8c02645e6af 83
yihui 5:b8c02645e6af 84 /** Checks to see if this I2C Slave has been addressed.
yihui 5:b8c02645e6af 85 *
yihui 5:b8c02645e6af 86 * @returns
yihui 5:b8c02645e6af 87 * A status indicating if the device has been addressed, and how
yihui 5:b8c02645e6af 88 * - NoData - the slave has not been addressed
yihui 5:b8c02645e6af 89 * - ReadAddressed - the master has requested a read from this slave
yihui 5:b8c02645e6af 90 * - WriteAddressed - the master is writing to this slave
yihui 5:b8c02645e6af 91 * - WriteGeneral - the master is writing to all slave
yihui 5:b8c02645e6af 92 */
yihui 5:b8c02645e6af 93 int receive(void);
yihui 5:b8c02645e6af 94
yihui 5:b8c02645e6af 95 /** Read from an I2C master.
yihui 5:b8c02645e6af 96 *
yihui 5:b8c02645e6af 97 * @param data pointer to the byte array to read data in to
yihui 5:b8c02645e6af 98 * @param length maximum number of bytes to read
yihui 5:b8c02645e6af 99 *
yihui 5:b8c02645e6af 100 * @returns
yihui 5:b8c02645e6af 101 * 0 on success,
yihui 5:b8c02645e6af 102 * non-0 otherwise
yihui 5:b8c02645e6af 103 */
yihui 5:b8c02645e6af 104 int read(char *data, int length);
yihui 5:b8c02645e6af 105
yihui 5:b8c02645e6af 106 /** Read a single byte from an I2C master.
yihui 5:b8c02645e6af 107 *
yihui 5:b8c02645e6af 108 * @returns
yihui 5:b8c02645e6af 109 * the byte read
yihui 5:b8c02645e6af 110 */
yihui 5:b8c02645e6af 111 int read(void);
yihui 5:b8c02645e6af 112
yihui 5:b8c02645e6af 113 /** Write to an I2C master.
yihui 5:b8c02645e6af 114 *
yihui 5:b8c02645e6af 115 * @param data pointer to the byte array to be transmitted
yihui 5:b8c02645e6af 116 * @param length the number of bytes to transmite
yihui 5:b8c02645e6af 117 *
yihui 5:b8c02645e6af 118 * @returns
yihui 5:b8c02645e6af 119 * 0 on success,
yihui 5:b8c02645e6af 120 * non-0 otherwise
yihui 5:b8c02645e6af 121 */
yihui 5:b8c02645e6af 122 int write(const char *data, int length);
yihui 5:b8c02645e6af 123
yihui 5:b8c02645e6af 124 /** Write a single byte to an I2C master.
yihui 5:b8c02645e6af 125 *
yihui 5:b8c02645e6af 126 * @data the byte to write
yihui 5:b8c02645e6af 127 *
yihui 5:b8c02645e6af 128 * @returns
yihui 5:b8c02645e6af 129 * '1' if an ACK was received,
yihui 5:b8c02645e6af 130 * '0' otherwise
yihui 5:b8c02645e6af 131 */
yihui 5:b8c02645e6af 132 int write(int data);
yihui 5:b8c02645e6af 133
yihui 5:b8c02645e6af 134 /** Sets the I2C slave address.
yihui 5:b8c02645e6af 135 *
yihui 5:b8c02645e6af 136 * @param address The address to set for the slave (ignoring the least
yihui 5:b8c02645e6af 137 * signifcant bit). If set to 0, the slave will only respond to the
yihui 5:b8c02645e6af 138 * general call address.
yihui 5:b8c02645e6af 139 */
yihui 5:b8c02645e6af 140 void address(int address);
yihui 5:b8c02645e6af 141
yihui 5:b8c02645e6af 142 /** Reset the I2C slave back into the known ready receiving state.
yihui 5:b8c02645e6af 143 */
yihui 5:b8c02645e6af 144 void stop(void);
yihui 5:b8c02645e6af 145
yihui 5:b8c02645e6af 146 protected:
yihui 5:b8c02645e6af 147 i2c_t _i2c;
yihui 5:b8c02645e6af 148 };
yihui 5:b8c02645e6af 149
yihui 5:b8c02645e6af 150 } // namespace mbed
yihui 5:b8c02645e6af 151
yihui 5:b8c02645e6af 152 #endif
yihui 5:b8c02645e6af 153
yihui 5:b8c02645e6af 154 #endif