1 | /* Copyright (c) 2014, Nordic Semiconductor ASA
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2 | *
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3 | * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 | * of this software and associated documentation files (the "Software"), to deal
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5 | * in the Software without restriction, including without limitation the rights
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6 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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7 | * copies of the Software, and to permit persons to whom the Software is
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8 | * furnished to do so, subject to the following conditions:
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9 | *
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10 | * The above copyright notice and this permission notice shall be included in all
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11 | * copies or substantial portions of the Software.
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12 | *
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13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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18 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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19 | * SOFTWARE.
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20 | */
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21 |
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22 | /** @file
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23 | * @brief Interface for hal_aci_tl.
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24 | */
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25 |
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26 | /** @defgroup hal_aci_tl hal_aci_tl
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27 | @{
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28 | @ingroup hal
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29 |
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30 | @brief Module for the ACI Transport Layer interface
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31 | @details This module is responsible for sending and receiving messages over the ACI interface of the nRF8001 chip.
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32 | The hal_aci_tl_send_cmd() can be called directly to send ACI commands.
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33 |
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34 |
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35 | The RDYN line is hooked to an interrupt on the MCU when the level is low.
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36 | The SPI master clocks in the interrupt context.
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37 | The ACI Command is taken from the head of the command queue is sent over the SPI
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38 | and the received ACI event is placed in the tail of the event queue.
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39 |
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40 | */
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41 |
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42 | #ifndef HAL_ACI_TL_H__
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43 | #define HAL_ACI_TL_H__
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44 |
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45 | #include "hal_platform.h"
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46 | #include "aci.h"
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47 | #include "boards.h"
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48 |
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49 | #ifndef HAL_ACI_MAX_LENGTH
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50 | #define HAL_ACI_MAX_LENGTH 31
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51 | #endif
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52 |
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53 | /************************************************************************/
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54 | /* Unused nRF8001 pin */
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55 | /************************************************************************/
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56 | #define UNUSED 255
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57 |
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58 | /** Data type for ACI commands and events */
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59 | typedef struct {
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60 | uint8_t status_byte;
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61 | uint8_t buffer[HAL_ACI_MAX_LENGTH+1];
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62 | } _aci_packed_ hal_aci_data_t;
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63 |
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64 | ACI_ASSERT_SIZE(hal_aci_data_t, HAL_ACI_MAX_LENGTH + 2);
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65 |
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66 | /** Datatype for ACI pins and interface (polling/interrupt)*/
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67 | typedef struct aci_pins_t
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68 | {
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69 | uint8_t board_name; //Optional : Use BOARD_DEFAULT if you do not know. See boards.h
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70 | uint8_t reqn_pin; //Required
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71 | uint8_t rdyn_pin; //Required
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72 | // uint8_t mosi_pin; //Required
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73 | // uint8_t miso_pin; //Required
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74 | // uint8_t sck_pin; //Required
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75 |
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76 | // uint8_t spi_clock_divider; //Required : Clock divider on the SPI clock : nRF8001 supports a maximum clock of 3MHz
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77 | void *spihandle; //Required
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78 |
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79 | uint8_t reset_pin; //Recommended but optional - Set it to UNUSED when not connected
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80 | uint8_t active_pin; //Optional - Set it to UNUSED when not connected
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81 | uint8_t optional_chip_sel_pin; //Optional - Used only when the reqn line is required to be separate from the SPI chip select. Eg. Arduino DUE
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82 |
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83 | bool interface_is_interrupt; //Required - true = Uses interrupt on RDYN pin. false - Uses polling on RDYN pin
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84 |
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85 | // uint8_t interrupt_number; //Required when using interrupts, otherwise ignored
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86 | int event_taskid; //Required event taskid
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87 | } aci_pins_t;
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88 |
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89 | /** @brief ACI Transport Layer initialization.
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90 | * @details
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91 | * This function initializes the transport layer, including configuring the SPI, creating
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92 | * message queues for Commands and Events and setting up interrupt if required.
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93 | * @param a_pins Pins on the MCU used to connect to the nRF8001
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94 | * @param bool True if debug printing should be enabled on the Serial.
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95 | */
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96 | void hal_aci_tl_init(aci_pins_t *a_pins, bool debug);
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97 |
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98 | /** @brief Sends an ACI command to the radio.
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99 | * @details
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100 | * This function sends an ACI command to the radio. This queue up the message to send and
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101 | * lower the request line. When the device lowers the ready line, @ref m_aci_spi_transfer()
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102 | * will send the data.
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103 | * @param aci_buffer Pointer to the message to send.
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104 | * @return True if the data was successfully queued for sending,
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105 | * false if there is no more space to store messages to send.
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106 | */
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107 | bool hal_aci_tl_send(hal_aci_data_t *aci_buffer);
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108 |
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109 | /** @brief Process pending transactions.
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110 | * @details
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111 | * The library code takes care of calling this function to check if the nRF8001 RDYN line indicates a
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112 | * pending transaction. It will send a pending message if there is one and return any receive message
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113 | * that was pending.
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114 | * @return Points to data buffer for received data. Length byte in buffer is 0 if no data received.
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115 | */
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116 | hal_aci_data_t * hal_aci_tl_poll_get(void);
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117 |
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118 | /** @brief Get an ACI event from the event queue
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119 | * @details
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120 | * Call this function from the main context to get an event from the ACI event queue
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121 | * This is called by lib_aci_event_get
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122 | */
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123 | bool hal_aci_tl_event_get(hal_aci_data_t *p_aci_data);
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124 |
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125 | /** @brief Peek an ACI event from the event queue
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126 | * @details
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127 | * Call this function from the main context to peek an event from the ACI event queue.
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128 | * This is called by lib_aci_event_peek
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129 | */
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130 | bool hal_aci_tl_event_peek(hal_aci_data_t *p_aci_data);
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131 |
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132 | /** @brief Enable debug printing of all ACI commands sent and ACI events received
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133 | * @details
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134 | * when the enable parameter is true. The debug printing is enabled on the Serial.
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135 | * When the enable parameter is false. The debug printing is disabled on the Serial.
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136 | * By default the debug printing is disabled.
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137 | */
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138 | void hal_aci_tl_debug_print(bool enable);
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139 |
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140 |
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141 | /** @brief Pin reset the nRF8001
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142 | * @details
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143 | * The reset line of the nF8001 needs to kept low for 200 ns.
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144 | * Redbearlab shield v1.1 and v2012.07 are exceptions as they
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145 | * have a Power ON Reset circuit that works differently.
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146 | * The function handles the exceptions based on the board_name in aci_pins_t
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147 | */
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148 | void hal_aci_tl_pin_reset(void);
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149 |
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150 | /** @brief Return full status of transmit queue
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151 | * @details
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152 | *
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153 | */
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154 | bool hal_aci_tl_rx_q_full(void);
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155 |
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156 | /** @brief Return empty status of receive queue
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157 | * @details
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158 | *
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159 | */
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160 | bool hal_aci_tl_rx_q_empty(void);
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161 |
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162 | /** @brief Return full status of receive queue
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163 | * @details
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164 | *
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165 | */
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166 | bool hal_aci_tl_tx_q_full(void);
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167 |
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168 | /** @brief Return empty status of transmit queue
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169 | * @details
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170 | *
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171 | */
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172 | bool hal_aci_tl_tx_q_empty(void);
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173 |
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174 | /** @brief Flush the ACI command Queue and the ACI Event Queue
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175 | * @details
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176 | * Call this function in the main thread
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177 | */
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178 | void hal_aci_tl_q_flush(void);
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179 |
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180 | /**
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181 | * added aci interrupt function
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182 | */
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183 | void m_aci_isr(void);
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184 |
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185 | /**
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186 | * added aci task function
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187 | */
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188 | void aci_task(int arg);
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189 |
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190 | #endif // HAL_ACI_TL_H__
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191 | /** @} */
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