Bluetooth enabled control of a BLDC via the Allegro MicroSystems A4960.
Dependencies: BLE_API mbed nRF51822
Fork of BLE_LED by
spi_master.cpp@11:4251b62991ac, 2017-05-16 (annotated)
- Committer:
- anniemao
- Date:
- Tue May 16 19:31:49 2017 +0000
- Revision:
- 11:4251b62991ac
Annie Mao 2017
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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anniemao | 11:4251b62991ac | 1 | /* |
anniemao | 11:4251b62991ac | 2 | |
anniemao | 11:4251b62991ac | 3 | Copyright (c) 2012-2014 RedBearLab |
anniemao | 11:4251b62991ac | 4 | |
anniemao | 11:4251b62991ac | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
anniemao | 11:4251b62991ac | 6 | and associated documentation files (the "Software"), to deal in the Software without restriction, |
anniemao | 11:4251b62991ac | 7 | including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, |
anniemao | 11:4251b62991ac | 8 | and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, |
anniemao | 11:4251b62991ac | 9 | subject to the following conditions: |
anniemao | 11:4251b62991ac | 10 | The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
anniemao | 11:4251b62991ac | 11 | |
anniemao | 11:4251b62991ac | 12 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
anniemao | 11:4251b62991ac | 13 | INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
anniemao | 11:4251b62991ac | 14 | PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE |
anniemao | 11:4251b62991ac | 15 | FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
anniemao | 11:4251b62991ac | 16 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
anniemao | 11:4251b62991ac | 17 | |
anniemao | 11:4251b62991ac | 18 | */ |
anniemao | 11:4251b62991ac | 19 | |
anniemao | 11:4251b62991ac | 20 | #include "spi_master.h" |
anniemao | 11:4251b62991ac | 21 | |
anniemao | 11:4251b62991ac | 22 | /********************************************************************** |
anniemao | 11:4251b62991ac | 23 | name : |
anniemao | 11:4251b62991ac | 24 | function : |
anniemao | 11:4251b62991ac | 25 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 26 | SPIClass::SPIClass(NRF_SPI_Type *_spi) : spi(_spi) |
anniemao | 11:4251b62991ac | 27 | { |
anniemao | 11:4251b62991ac | 28 | //do nothing |
anniemao | 11:4251b62991ac | 29 | } |
anniemao | 11:4251b62991ac | 30 | |
anniemao | 11:4251b62991ac | 31 | /********************************************************************** |
anniemao | 11:4251b62991ac | 32 | name : |
anniemao | 11:4251b62991ac | 33 | function : |
anniemao | 11:4251b62991ac | 34 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 35 | void SPIClass::setCPOL( bool active_low) |
anniemao | 11:4251b62991ac | 36 | { |
anniemao | 11:4251b62991ac | 37 | if(active_low) |
anniemao | 11:4251b62991ac | 38 | { |
anniemao | 11:4251b62991ac | 39 | spi->CONFIG |= (SPI_CONFIG_CPOL_ActiveLow << SPI_CONFIG_CPOL_Pos); |
anniemao | 11:4251b62991ac | 40 | } |
anniemao | 11:4251b62991ac | 41 | else |
anniemao | 11:4251b62991ac | 42 | { |
anniemao | 11:4251b62991ac | 43 | spi->CONFIG |= (SPI_CONFIG_CPOL_ActiveHigh << SPI_CONFIG_CPOL_Pos); |
anniemao | 11:4251b62991ac | 44 | } |
anniemao | 11:4251b62991ac | 45 | } |
anniemao | 11:4251b62991ac | 46 | |
anniemao | 11:4251b62991ac | 47 | /********************************************************************** |
anniemao | 11:4251b62991ac | 48 | name : |
anniemao | 11:4251b62991ac | 49 | function : |
anniemao | 11:4251b62991ac | 50 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 51 | void SPIClass::setCPHA( bool trailing) |
anniemao | 11:4251b62991ac | 52 | { |
anniemao | 11:4251b62991ac | 53 | if(trailing) |
anniemao | 11:4251b62991ac | 54 | { |
anniemao | 11:4251b62991ac | 55 | spi->CONFIG |= (SPI_CONFIG_CPHA_Trailing << SPI_CONFIG_CPHA_Pos); |
anniemao | 11:4251b62991ac | 56 | } |
anniemao | 11:4251b62991ac | 57 | else |
anniemao | 11:4251b62991ac | 58 | { |
anniemao | 11:4251b62991ac | 59 | spi->CONFIG |= (SPI_CONFIG_CPHA_Leading << SPI_CONFIG_CPHA_Pos); |
anniemao | 11:4251b62991ac | 60 | } |
anniemao | 11:4251b62991ac | 61 | |
anniemao | 11:4251b62991ac | 62 | } |
anniemao | 11:4251b62991ac | 63 | |
anniemao | 11:4251b62991ac | 64 | /********************************************************************** |
anniemao | 11:4251b62991ac | 65 | name : |
anniemao | 11:4251b62991ac | 66 | function : MSBFIRST, LSBFIRST |
anniemao | 11:4251b62991ac | 67 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 68 | void SPIClass::setBitORDER( BitOrder bit) |
anniemao | 11:4251b62991ac | 69 | { |
anniemao | 11:4251b62991ac | 70 | if(bit == MSBFIRST) |
anniemao | 11:4251b62991ac | 71 | { |
anniemao | 11:4251b62991ac | 72 | spi->CONFIG |= (SPI_CONFIG_ORDER_MsbFirst << SPI_CONFIG_ORDER_Pos); |
anniemao | 11:4251b62991ac | 73 | } |
anniemao | 11:4251b62991ac | 74 | else |
anniemao | 11:4251b62991ac | 75 | { |
anniemao | 11:4251b62991ac | 76 | spi->CONFIG |= (SPI_CONFIG_ORDER_LsbFirst << SPI_CONFIG_ORDER_Pos); |
anniemao | 11:4251b62991ac | 77 | } |
anniemao | 11:4251b62991ac | 78 | } |
anniemao | 11:4251b62991ac | 79 | |
anniemao | 11:4251b62991ac | 80 | /********************************************************************** |
anniemao | 11:4251b62991ac | 81 | name : |
anniemao | 11:4251b62991ac | 82 | function : |
anniemao | 11:4251b62991ac | 83 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 84 | void SPIClass::setFrequency(uint8_t speed) |
anniemao | 11:4251b62991ac | 85 | { |
anniemao | 11:4251b62991ac | 86 | if (speed == 0) |
anniemao | 11:4251b62991ac | 87 | { |
anniemao | 11:4251b62991ac | 88 | spi->FREQUENCY = SPI_FREQUENCY_125K; |
anniemao | 11:4251b62991ac | 89 | } |
anniemao | 11:4251b62991ac | 90 | else if (speed == 1) |
anniemao | 11:4251b62991ac | 91 | { |
anniemao | 11:4251b62991ac | 92 | spi->FREQUENCY = SPI_FREQUENCY_250K; |
anniemao | 11:4251b62991ac | 93 | } |
anniemao | 11:4251b62991ac | 94 | else if (speed == 2) |
anniemao | 11:4251b62991ac | 95 | { |
anniemao | 11:4251b62991ac | 96 | spi->FREQUENCY = SPI_FREQUENCY_500K; |
anniemao | 11:4251b62991ac | 97 | } |
anniemao | 11:4251b62991ac | 98 | else if (speed == 3) |
anniemao | 11:4251b62991ac | 99 | { |
anniemao | 11:4251b62991ac | 100 | spi->FREQUENCY = SPI_FREQUENCY_1M; |
anniemao | 11:4251b62991ac | 101 | } |
anniemao | 11:4251b62991ac | 102 | else if (speed == 4) |
anniemao | 11:4251b62991ac | 103 | { |
anniemao | 11:4251b62991ac | 104 | spi->FREQUENCY = SPI_FREQUENCY_2M; |
anniemao | 11:4251b62991ac | 105 | } |
anniemao | 11:4251b62991ac | 106 | else if (speed == 5) |
anniemao | 11:4251b62991ac | 107 | { |
anniemao | 11:4251b62991ac | 108 | spi->FREQUENCY = SPI_FREQUENCY_4M; |
anniemao | 11:4251b62991ac | 109 | } |
anniemao | 11:4251b62991ac | 110 | else if (speed == 6) |
anniemao | 11:4251b62991ac | 111 | { |
anniemao | 11:4251b62991ac | 112 | spi->FREQUENCY = SPI_FREQUENCY_8M; |
anniemao | 11:4251b62991ac | 113 | } |
anniemao | 11:4251b62991ac | 114 | else |
anniemao | 11:4251b62991ac | 115 | { |
anniemao | 11:4251b62991ac | 116 | spi->FREQUENCY = SPI_FREQUENCY_4M; |
anniemao | 11:4251b62991ac | 117 | } |
anniemao | 11:4251b62991ac | 118 | } |
anniemao | 11:4251b62991ac | 119 | |
anniemao | 11:4251b62991ac | 120 | /********************************************************************** |
anniemao | 11:4251b62991ac | 121 | name : |
anniemao | 11:4251b62991ac | 122 | function : |
anniemao | 11:4251b62991ac | 123 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 124 | void SPIClass::setSPIMode( uint8_t mode ) |
anniemao | 11:4251b62991ac | 125 | { |
anniemao | 11:4251b62991ac | 126 | if (SPI_MODE0 == mode) |
anniemao | 11:4251b62991ac | 127 | { |
anniemao | 11:4251b62991ac | 128 | setCPOL(0); |
anniemao | 11:4251b62991ac | 129 | setCPHA(0); |
anniemao | 11:4251b62991ac | 130 | } |
anniemao | 11:4251b62991ac | 131 | else if (mode == SPI_MODE1) |
anniemao | 11:4251b62991ac | 132 | { |
anniemao | 11:4251b62991ac | 133 | setCPOL(0); |
anniemao | 11:4251b62991ac | 134 | setCPHA(1); |
anniemao | 11:4251b62991ac | 135 | } |
anniemao | 11:4251b62991ac | 136 | else if (mode == SPI_MODE2) |
anniemao | 11:4251b62991ac | 137 | { |
anniemao | 11:4251b62991ac | 138 | setCPOL(1); |
anniemao | 11:4251b62991ac | 139 | setCPHA(0); |
anniemao | 11:4251b62991ac | 140 | } |
anniemao | 11:4251b62991ac | 141 | else if (mode == SPI_MODE3) |
anniemao | 11:4251b62991ac | 142 | { |
anniemao | 11:4251b62991ac | 143 | setCPOL(1); |
anniemao | 11:4251b62991ac | 144 | setCPHA(1); |
anniemao | 11:4251b62991ac | 145 | } |
anniemao | 11:4251b62991ac | 146 | else |
anniemao | 11:4251b62991ac | 147 | { |
anniemao | 11:4251b62991ac | 148 | setCPOL(0); |
anniemao | 11:4251b62991ac | 149 | setCPHA(0); |
anniemao | 11:4251b62991ac | 150 | } |
anniemao | 11:4251b62991ac | 151 | } |
anniemao | 11:4251b62991ac | 152 | |
anniemao | 11:4251b62991ac | 153 | /********************************************************************** |
anniemao | 11:4251b62991ac | 154 | name : |
anniemao | 11:4251b62991ac | 155 | function : |
anniemao | 11:4251b62991ac | 156 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 157 | void SPIClass::begin(uint32_t sck, uint32_t mosi, uint32_t miso) |
anniemao | 11:4251b62991ac | 158 | { |
anniemao | 11:4251b62991ac | 159 | |
anniemao | 11:4251b62991ac | 160 | SCK_Pin = sck; |
anniemao | 11:4251b62991ac | 161 | MOSI_Pin = mosi; |
anniemao | 11:4251b62991ac | 162 | MISO_Pin = miso; |
anniemao | 11:4251b62991ac | 163 | |
anniemao | 11:4251b62991ac | 164 | NRF_GPIO->PIN_CNF[SCK_Pin] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
anniemao | 11:4251b62991ac | 165 | | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
anniemao | 11:4251b62991ac | 166 | | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
anniemao | 11:4251b62991ac | 167 | | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
anniemao | 11:4251b62991ac | 168 | | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); |
anniemao | 11:4251b62991ac | 169 | |
anniemao | 11:4251b62991ac | 170 | NRF_GPIO->PIN_CNF[MOSI_Pin] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
anniemao | 11:4251b62991ac | 171 | | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
anniemao | 11:4251b62991ac | 172 | | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
anniemao | 11:4251b62991ac | 173 | | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
anniemao | 11:4251b62991ac | 174 | | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); |
anniemao | 11:4251b62991ac | 175 | |
anniemao | 11:4251b62991ac | 176 | NRF_GPIO->PIN_CNF[MISO_Pin] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
anniemao | 11:4251b62991ac | 177 | | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
anniemao | 11:4251b62991ac | 178 | | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
anniemao | 11:4251b62991ac | 179 | | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
anniemao | 11:4251b62991ac | 180 | | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos); |
anniemao | 11:4251b62991ac | 181 | spi->PSELSCK = SCK_Pin; |
anniemao | 11:4251b62991ac | 182 | spi->PSELMOSI = MOSI_Pin; |
anniemao | 11:4251b62991ac | 183 | spi->PSELMISO = MISO_Pin; |
anniemao | 11:4251b62991ac | 184 | |
anniemao | 11:4251b62991ac | 185 | setFrequency(SPI_1M); |
anniemao | 11:4251b62991ac | 186 | setSPIMode(SPI_MODE3); |
anniemao | 11:4251b62991ac | 187 | setBitORDER(MSBFIRST); |
anniemao | 11:4251b62991ac | 188 | |
anniemao | 11:4251b62991ac | 189 | spi->EVENTS_READY = 0; |
anniemao | 11:4251b62991ac | 190 | spi->ENABLE = (SPI_ENABLE_ENABLE_Enabled << SPI_ENABLE_ENABLE_Pos); |
anniemao | 11:4251b62991ac | 191 | |
anniemao | 11:4251b62991ac | 192 | } |
anniemao | 11:4251b62991ac | 193 | |
anniemao | 11:4251b62991ac | 194 | /********************************************************************** |
anniemao | 11:4251b62991ac | 195 | name : |
anniemao | 11:4251b62991ac | 196 | function : |
anniemao | 11:4251b62991ac | 197 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 198 | void SPIClass::begin() |
anniemao | 11:4251b62991ac | 199 | { |
anniemao | 11:4251b62991ac | 200 | begin(SCK, MOSI, MISO); |
anniemao | 11:4251b62991ac | 201 | } |
anniemao | 11:4251b62991ac | 202 | |
anniemao | 11:4251b62991ac | 203 | /********************************************************************** |
anniemao | 11:4251b62991ac | 204 | name : |
anniemao | 11:4251b62991ac | 205 | function : |
anniemao | 11:4251b62991ac | 206 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 207 | uint8_t SPIClass::transfer(uint8_t data) |
anniemao | 11:4251b62991ac | 208 | { |
anniemao | 11:4251b62991ac | 209 | while( spi->EVENTS_READY != 0U ); |
anniemao | 11:4251b62991ac | 210 | |
anniemao | 11:4251b62991ac | 211 | spi->TXD = (uint32_t)data; |
anniemao | 11:4251b62991ac | 212 | |
anniemao | 11:4251b62991ac | 213 | while(spi->EVENTS_READY == 0); |
anniemao | 11:4251b62991ac | 214 | |
anniemao | 11:4251b62991ac | 215 | data = (uint8_t)spi->RXD; |
anniemao | 11:4251b62991ac | 216 | |
anniemao | 11:4251b62991ac | 217 | spi->EVENTS_READY = 0; |
anniemao | 11:4251b62991ac | 218 | |
anniemao | 11:4251b62991ac | 219 | return data; |
anniemao | 11:4251b62991ac | 220 | } |
anniemao | 11:4251b62991ac | 221 | |
anniemao | 11:4251b62991ac | 222 | /********************************************************************** |
anniemao | 11:4251b62991ac | 223 | name : |
anniemao | 11:4251b62991ac | 224 | function : |
anniemao | 11:4251b62991ac | 225 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 226 | void SPIClass::endTransfer() |
anniemao | 11:4251b62991ac | 227 | { |
anniemao | 11:4251b62991ac | 228 | spi->ENABLE = (SPI_ENABLE_ENABLE_Disabled << SPI_ENABLE_ENABLE_Pos); |
anniemao | 11:4251b62991ac | 229 | } |
anniemao | 11:4251b62991ac | 230 | |
anniemao | 11:4251b62991ac | 231 | /********************************************************************** |
anniemao | 11:4251b62991ac | 232 | name : |
anniemao | 11:4251b62991ac | 233 | function : |
anniemao | 11:4251b62991ac | 234 | **********************************************************************/ |
anniemao | 11:4251b62991ac | 235 | |
anniemao | 11:4251b62991ac | 236 | //SPIClass SPI(NRF_SPI1); |