amiro-lld / source / alld_pcal6524.c @ 21076167
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1 | e3287406 | Thomas Schöpping | /*
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2 | AMiRo-LLD is a compilation of low-level hardware drivers for the Autonomous Mini Robot (AMiRo) platform.
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3 | Copyright (C) 2016..2019 Thomas Schöpping et al.
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4 | |||
5 | This program is free software: you can redistribute it and/or modify
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6 | it under the terms of the GNU Lesser General Public License as published by
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7 | the Free Software Foundation, either version 3 of the License, or
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8 | (at your option) any later version.
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9 | |||
10 | This program is distributed in the hope that it will be useful,
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | GNU Lesser General Public License for more details.
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14 | |||
15 | You should have received a copy of the GNU Lesser General Public License
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16 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 | */
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18 | |||
19 | /**
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20 | * @file alld_pcal6524.c
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21 | * @brief GPIO extender function implementations.
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22 | *
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23 | * @addtogroup lld_gpioext
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24 | * @{
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25 | */
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26 | |||
27 | #include <alld_pcal6524.h> |
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28 | |||
29 | #if defined(AMIROLLD_CFG_USE_PCAL6524) || defined(__DOXYGEN__)
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30 | |||
31 | #include <string.h> |
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32 | |||
33 | ef078306 | Thomas Schöpping | /******************************************************************************/
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34 | /* LOCAL DEFINITIONS */
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35 | /******************************************************************************/
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36 | e3287406 | Thomas Schöpping | |
37 | 21076167 | Thomas Schöpping | #define _MAXIMUM_GROUP_SIZE 6 |
38 | e3287406 | Thomas Schöpping | |
39 | ef078306 | Thomas Schöpping | /******************************************************************************/
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40 | /* EXPORTED VARIABLES */
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41 | /******************************************************************************/
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42 | |||
43 | /******************************************************************************/
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44 | /* LOCAL TYPES */
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45 | /******************************************************************************/
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46 | |||
47 | /******************************************************************************/
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48 | /* LOCAL VARIABLES */
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49 | /******************************************************************************/
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50 | |||
51 | /******************************************************************************/
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52 | /* LOCAL FUNCTIONS */
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53 | /******************************************************************************/
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54 | |||
55 | /******************************************************************************/
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56 | /* EXPORTED FUNCTIONS */
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57 | /******************************************************************************/
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58 | e3287406 | Thomas Schöpping | |
59 | /**
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60 | * @brief Returns the size of the group for a specified command.
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61 | *
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62 | * @param[in] cmd Command to retrieve the group size for.
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63 | *
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64 | * @return The size of the group in bytes.
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65 | */
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66 | 21076167 | Thomas Schöpping | uint8_t pcal6524_lld_cmd_groupsize(const pcal6524_lld_cmd_t cmd)
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67 | e3287406 | Thomas Schöpping | { |
68 | switch (cmd) {
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69 | case PCAL6524_LLD_CMD_OUTPUTCONFIGURATION:
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70 | case PCAL6524_LLD_CMD_SWITCHDEBOUNCECOUNT:
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71 | return 1; |
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72 | case PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P0:
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73 | case PCAL6524_LLD_CMD_SWITCHDEBOUNCEENABLE_P1:
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74 | return 2; |
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75 | case PCAL6524_LLD_CMD_INPUT_P0:
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76 | case PCAL6524_LLD_CMD_INPUT_P1:
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77 | case PCAL6524_LLD_CMD_INPUT_P2:
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78 | case PCAL6524_LLD_CMD_OUTPUT_P0:
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79 | case PCAL6524_LLD_CMD_OUTPUT_P1:
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80 | case PCAL6524_LLD_CMD_OUTPUT_P2:
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81 | case PCAL6524_LLD_CMD_POLARITYINVERSION_P0:
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82 | case PCAL6524_LLD_CMD_POLARITYINVERSION_P1:
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83 | case PCAL6524_LLD_CMD_POLARITYINVERSION_P2:
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84 | case PCAL6524_LLD_CMD_CONFIGURATION_P0:
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85 | case PCAL6524_LLD_CMD_CONFIGURATION_P1:
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86 | case PCAL6524_LLD_CMD_CONFIGURATION_P2:
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87 | case PCAL6524_LLD_CMD_INPUTLATCH_P0:
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88 | case PCAL6524_LLD_CMD_INPUTLATCH_P1:
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89 | case PCAL6524_LLD_CMD_INPUTLATCH_P2:
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90 | case PCAL6524_LLD_CMD_PUPDENABLE_P0:
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91 | case PCAL6524_LLD_CMD_PUPDENABLE_P1:
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92 | case PCAL6524_LLD_CMD_PUPDENABLE_P2:
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93 | case PCAL6524_LLD_CMD_PUPDSELECTION_P0:
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94 | case PCAL6524_LLD_CMD_PUPDSELECTION_P1:
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95 | case PCAL6524_LLD_CMD_PUPDSELECTION_P2:
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96 | case PCAL6524_LLD_CMD_INTERRUPTMASK_P0:
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97 | case PCAL6524_LLD_CMD_INTERRUPTMASK_P1:
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98 | case PCAL6524_LLD_CMD_INTERRUPTMASK_P2:
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99 | case PCAL6524_LLD_CMD_INTERRUPTSTATUS_P0:
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100 | case PCAL6524_LLD_CMD_INTERRUPTSTATUS_P1:
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101 | case PCAL6524_LLD_CMD_INTERRUPTSTATUS_P2:
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102 | case PCAL6524_LLD_CMD_INTERRUPTCLEAR_P0:
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103 | case PCAL6524_LLD_CMD_INTERRUPTCLEAR_P1:
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104 | case PCAL6524_LLD_CMD_INTERRUPTCLEAR_P2:
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105 | case PCAL6524_LLD_CMD_INPUTSTATUS_P0:
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106 | case PCAL6524_LLD_CMD_INPUTSTATUS_P1:
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107 | case PCAL6524_LLD_CMD_INPUTSTATUS_P2:
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108 | case PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P0:
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109 | case PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P1:
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110 | case PCAL6524_LLD_CMD_INDIVIDUALPINOUTPUTCONFIGURATION_P2:
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111 | return 3; |
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112 | case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0A:
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113 | case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P0B:
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114 | case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1A:
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115 | case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P1B:
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116 | case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2A:
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117 | case PCAL6524_LLD_CMD_OUTPUTDRIVESTRENGTH_P2B:
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118 | case PCAL6524_LLD_CMD_INTERRUPTEDGE_P0A:
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119 | case PCAL6524_LLD_CMD_INTERRUPTEDGE_P0B:
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120 | case PCAL6524_LLD_CMD_INTERRUPTEDGE_P1A:
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121 | case PCAL6524_LLD_CMD_INTERRUPTEDGE_P1B:
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122 | case PCAL6524_LLD_CMD_INTERRUPTEDGE_P2A:
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123 | case PCAL6524_LLD_CMD_INTERRUPTEDGE_P2B:
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124 | return 6; |
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125 | } |
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126 | // must never occur
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127 | apalDbgAssert(false);
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128 | return 0; |
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129 | } |
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130 | |||
131 | /*============================================================================*/
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132 | /* general register access */
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133 | /*============================================================================*/
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134 | |||
135 | // Reading the ID is currently not supported, since the required I²C sequence can not trivially executed via periphAL and ChibiOS/HAL.
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136 | ///**
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137 | // * @brief Read device ID and manufacturer information.
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138 | // *
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139 | // * @param[in] pcal6524d The PCAL6524 driver to use.
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140 | // * @param[out] info Pointer where to store the information data.
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141 | // * @param[in] timeout Timeout for the function to return.
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142 | // *
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143 | // * @return Indicator whether the function call was successful or a timeout occurred.
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144 | // */
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145 | 21076167 | Thomas Schöpping | //apalExitStatus_t pcal6524_lld_read_id(const PCAL6524Driver* const pcal6524d, pcal6524_lld_deviceid_t* const info, const apalTime_t timeout)
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146 | e3287406 | Thomas Schöpping | //{
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147 | // apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL);
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148 | // apalDbgAssert(info != NULL);
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149 | //
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150 | // const uint8_t txbuf = (uint8_t)pcal6524d->addr;
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151 | // return apalI2CMasterTransmit(pcal6524d->i2cd, PCAL6524_LLD_I2C_ADDR_DEVICEID, &txbuf, 1, info->raw, sizeof(info->raw), timeout);
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152 | //}
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153 | |||
154 | /**
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155 | * @brief Read 8bit data from any register.
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156 | *
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157 | * @param[in] pcal6524d The PCAL6524 driver to use.
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158 | * @param[in] reg Command register to read.
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159 | * @param[out] data Pointer to store the register data to.
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160 | * @param[in] timeout Timeout for the function to return (in microseconds).
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161 | *
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162 | * @return Indicator whether the function call was successful or a timeout occurred.
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163 | */
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164 | 21076167 | Thomas Schöpping | apalExitStatus_t pcal6524_lld_read_reg(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const apalTime_t timeout) |
165 | e3287406 | Thomas Schöpping | { |
166 | apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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167 | apalDbgAssert(data != NULL);
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168 | |||
169 | const uint8_t txbuf = (uint8_t)reg;
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170 | return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, &txbuf, 1, data, 1, timeout); |
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171 | } |
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172 | |||
173 | /**
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174 | * @brief Write 8bit data to any (writable) register.
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175 | *
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176 | * @param[in] pcal6524d The PCAL6524 driver to use.
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177 | * @param[in] reg Command register to write to.
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178 | * @param[in] data Data to transmit.
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179 | * @param[in] timeout Timout for the function to return (in microseconds).
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180 | *
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181 | * @return Indicator whether the function call was successful or a timeout occurred.
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182 | */
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183 | 21076167 | Thomas Schöpping | apalExitStatus_t pcal6524_lld_write_reg(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t data, const apalTime_t timeout) |
184 | e3287406 | Thomas Schöpping | { |
185 | apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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186 | |||
187 | uint8_t txbuf[2] = { (uint8_t)reg, data };
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188 | return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, txbuf, 2, NULL, 0, timeout); |
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189 | } |
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190 | |||
191 | /**
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192 | * @brief Read register group starting with an arbitrary register.
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193 | *
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194 | * @param[in] pcal6524d The PCAL6524 driver to use.
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195 | * @param[in] reg Command register to start at.
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196 | * @param[out] data Pointer to store rhe group data to.
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197 | * The reqired number of bytes depends on the group.
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198 | * @param[in] timeout Timeout for the function to return (in microseconds).
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199 | *
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200 | * @return Indicator whether the function call was successful or a timeout occurred.
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201 | */
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202 | 21076167 | Thomas Schöpping | apalExitStatus_t pcal6524_lld_read_group(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const apalTime_t timeout) |
203 | e3287406 | Thomas Schöpping | { |
204 | apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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205 | apalDbgAssert(data != NULL);
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206 | |||
207 | const uint8_t txbuf = (uint8_t)reg;
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208 | return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, &txbuf, 1, data, pcal6524_lld_cmd_groupsize(reg), timeout); |
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209 | } |
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210 | |||
211 | /**
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212 | * @brief Write register group data to any (writable) register.
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213 | *
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214 | * @param[in] pcal6524d The PCAL6524 driver to use.
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215 | * @param[in] reg Command register to start at.
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216 | * @param[in] data Data to transmit.
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217 | * The reqired number of bytes depends on the group.
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218 | * @param[in] timeout Timout for the function to return (in microseconds).
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219 | *
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220 | * @return Indicator whether the function call was successful or a timeout occurred.
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221 | */
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222 | 21076167 | Thomas Schöpping | apalExitStatus_t pcal6524_lld_write_group(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t* const data, const apalTime_t timeout) |
223 | e3287406 | Thomas Schöpping | { |
224 | apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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225 | apalDbgAssert(data != NULL);
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226 | |||
227 | uint8_t txbuf[_MAXIMUM_GROUP_SIZE + 1] = {(uint8_t)reg};
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228 | memcpy(&txbuf[1], data, pcal6524_lld_cmd_groupsize(reg));
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229 | return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, txbuf, pcal6524_lld_cmd_groupsize(reg) + 1, NULL, 0, timeout); |
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230 | } |
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231 | |||
232 | /**
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233 | * @brief Read multiple registers continously, starting at an arbitrary one.
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234 | *
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235 | * @param[in] pcal6524d The PCAL6524 driver to use.
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236 | * @param[in] reg Command register to start at.
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237 | * @param[out] data Pointer to store the group data to.
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238 | * @param[in] length Number of registers/bytes to read.
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239 | * @param[in] timeout Timeout for the function to return (in microseconds).
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240 | *
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241 | * @return Indicator whether the function call was successful or a timeout occurred.
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242 | */
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243 | 21076167 | Thomas Schöpping | apalExitStatus_t pcal6524_lld_read_continuous(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, uint8_t* const data, const uint8_t length, const apalTime_t timeout) |
244 | e3287406 | Thomas Schöpping | { |
245 | apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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246 | apalDbgAssert(data != NULL);
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247 | apalDbgAssert(length <= PCAL6524_LLD_NUM_REGISTERS); |
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248 | |||
249 | uint8_t txbuf = (uint8_t)reg | PCAL6524_LLD_CMD_AUTOINCREMENT; |
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250 | return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, &txbuf, 1, data, length, timeout); |
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251 | } |
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252 | |||
253 | /**
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254 | * @brief Write multiple registers continously, starting at an arbitrary one.
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255 | *
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256 | * @param[in] pcal6524d The PCAL6524 driver to use.
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257 | * @param[in] reg Command register to start at.
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258 | * @param[in] data Pointer to the data to write.
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259 | * @param[in] length Number of registers/bytes to write.
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260 | * @param[in] timeout Timeout for the function to return (in microseconds).
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261 | *
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262 | * @return Indicator whether the function call was successful or a timeout occurred.
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263 | */
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264 | 21076167 | Thomas Schöpping | apalExitStatus_t pcal6524_lld_write_continuous(const PCAL6524Driver* const pcal6524d, const pcal6524_lld_cmd_t reg, const uint8_t* const data, const uint8_t length, const apalTime_t timeout) |
265 | e3287406 | Thomas Schöpping | { |
266 | apalDbgAssert(pcal6524d != NULL && pcal6524d->i2cd != NULL); |
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267 | apalDbgAssert(data != NULL);
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268 | apalDbgAssert(length <= PCAL6524_LLD_NUM_REGISTERS); |
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269 | |||
270 | uint8_t txbuf[PCAL6524_LLD_NUM_REGISTERS + 1] = {(uint8_t)reg | PCAL6524_LLD_CMD_AUTOINCREMENT};
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271 | memcpy(&txbuf[1], data, length);
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272 | return apalI2CMasterTransmit(pcal6524d->i2cd, pcal6524d->addr, txbuf, length + 1, NULL, 0, timeout); |
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273 | } |
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274 | |||
275 | #endif /* defined(AMIROLLD_CFG_USE_PCAL6524) */ |
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276 | |||
277 | /** @} */ |