Frank 26080115
Date: March 20, 2011 This library is created from "LPC17xx CMSIS-Compliant Standard Peripheral Firmware Driver Library (GNU, Keil, IAR) (Jan 28, 2011)", available from NXP's website, under "All microcontrollers support documents" [[http://ics.nxp.com/support/documents/microcontrollers/?type=software]] You will need to follow [[/projects/libraries/svn/mbed/trunk/LPC1768/LPC17xx.h]] while using this library Examples provided here [[/users/frank26080115/programs/LPC1700CMSIS_Examples/]] The beautiful thing is that NXP does not place copyright protection on any of the files in here Only a few modifications are made to make it compile with the mbed online compiler, I fixed some warnings as well. This is untested as of March 20, 2011 Forum post about this library: [[/forum/mbed/topic/2030/]]
lpc17xx_spi.c@0:84d7747641aa, 2011-03-20 (annotated)
- Committer:
- frank26080115
- Date:
- Sun Mar 20 18:45:15 2011 +0000
- Revision:
- 0:84d7747641aa
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| frank26080115 | 0:84d7747641aa | 1 | /***********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 2 | * @file lpc17xx_spi.c |
| frank26080115 | 0:84d7747641aa | 3 | * @brief Contains all functions support for SPI firmware library on LPC17xx |
| frank26080115 | 0:84d7747641aa | 4 | * @version 2.0 |
| frank26080115 | 0:84d7747641aa | 5 | * @date 21. May. 2010 |
| frank26080115 | 0:84d7747641aa | 6 | * @author NXP MCU SW Application Team |
| frank26080115 | 0:84d7747641aa | 7 | ************************************************************************** |
| frank26080115 | 0:84d7747641aa | 8 | * Software that is described herein is for illustrative purposes only |
| frank26080115 | 0:84d7747641aa | 9 | * which provides customers with programming information regarding the |
| frank26080115 | 0:84d7747641aa | 10 | * products. This software is supplied "AS IS" without any warranties. |
| frank26080115 | 0:84d7747641aa | 11 | * NXP Semiconductors assumes no responsibility or liability for the |
| frank26080115 | 0:84d7747641aa | 12 | * use of the software, conveys no license or title under any patent, |
| frank26080115 | 0:84d7747641aa | 13 | * copyright, or mask work right to the product. NXP Semiconductors |
| frank26080115 | 0:84d7747641aa | 14 | * reserves the right to make changes in the software without |
| frank26080115 | 0:84d7747641aa | 15 | * notification. NXP Semiconductors also make no representation or |
| frank26080115 | 0:84d7747641aa | 16 | * warranty that such application will be suitable for the specified |
| frank26080115 | 0:84d7747641aa | 17 | * use without further testing or modification. |
| frank26080115 | 0:84d7747641aa | 18 | **********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 19 | |
| frank26080115 | 0:84d7747641aa | 20 | /* Peripheral group ----------------------------------------------------------- */ |
| frank26080115 | 0:84d7747641aa | 21 | /** @addtogroup SPI |
| frank26080115 | 0:84d7747641aa | 22 | * @{ |
| frank26080115 | 0:84d7747641aa | 23 | */ |
| frank26080115 | 0:84d7747641aa | 24 | |
| frank26080115 | 0:84d7747641aa | 25 | /* Includes ------------------------------------------------------------------- */ |
| frank26080115 | 0:84d7747641aa | 26 | #include "lpc17xx_spi.h" |
| frank26080115 | 0:84d7747641aa | 27 | #include "lpc17xx_clkpwr.h" |
| frank26080115 | 0:84d7747641aa | 28 | |
| frank26080115 | 0:84d7747641aa | 29 | /* If this source file built with example, the LPC17xx FW library configuration |
| frank26080115 | 0:84d7747641aa | 30 | * file in each example directory ("lpc17xx_libcfg.h") must be included, |
| frank26080115 | 0:84d7747641aa | 31 | * otherwise the default FW library configuration file must be included instead |
| frank26080115 | 0:84d7747641aa | 32 | */ |
| frank26080115 | 0:84d7747641aa | 33 | #ifdef __BUILD_WITH_EXAMPLE__ |
| frank26080115 | 0:84d7747641aa | 34 | #include "lpc17xx_libcfg.h" |
| frank26080115 | 0:84d7747641aa | 35 | #else |
| frank26080115 | 0:84d7747641aa | 36 | #include "lpc17xx_libcfg_default.h" |
| frank26080115 | 0:84d7747641aa | 37 | #endif /* __BUILD_WITH_EXAMPLE__ */ |
| frank26080115 | 0:84d7747641aa | 38 | |
| frank26080115 | 0:84d7747641aa | 39 | #ifdef _SPI |
| frank26080115 | 0:84d7747641aa | 40 | |
| frank26080115 | 0:84d7747641aa | 41 | |
| frank26080115 | 0:84d7747641aa | 42 | /* Public Functions ----------------------------------------------------------- */ |
| frank26080115 | 0:84d7747641aa | 43 | /** @addtogroup SPI_Public_Functions |
| frank26080115 | 0:84d7747641aa | 44 | * @{ |
| frank26080115 | 0:84d7747641aa | 45 | */ |
| frank26080115 | 0:84d7747641aa | 46 | |
| frank26080115 | 0:84d7747641aa | 47 | /*********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 48 | * @brief Setup clock rate for SPI device |
| frank26080115 | 0:84d7747641aa | 49 | * @param[in] SPIx SPI peripheral definition, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 50 | * @param[in] target_clock : clock of SPI (Hz) |
| frank26080115 | 0:84d7747641aa | 51 | * @return None |
| frank26080115 | 0:84d7747641aa | 52 | ***********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 53 | void SPI_SetClock (LPC_SPI_TypeDef *SPIx, uint32_t target_clock) |
| frank26080115 | 0:84d7747641aa | 54 | { |
| frank26080115 | 0:84d7747641aa | 55 | uint32_t spi_pclk; |
| frank26080115 | 0:84d7747641aa | 56 | uint32_t prescale, temp; |
| frank26080115 | 0:84d7747641aa | 57 | |
| frank26080115 | 0:84d7747641aa | 58 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 59 | |
| frank26080115 | 0:84d7747641aa | 60 | if (SPIx == LPC_SPI){ |
| frank26080115 | 0:84d7747641aa | 61 | spi_pclk = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_SPI); |
| frank26080115 | 0:84d7747641aa | 62 | } else { |
| frank26080115 | 0:84d7747641aa | 63 | return; |
| frank26080115 | 0:84d7747641aa | 64 | } |
| frank26080115 | 0:84d7747641aa | 65 | |
| frank26080115 | 0:84d7747641aa | 66 | prescale = 8; |
| frank26080115 | 0:84d7747641aa | 67 | // Find closest clock to target clock |
| frank26080115 | 0:84d7747641aa | 68 | while (1){ |
| frank26080115 | 0:84d7747641aa | 69 | temp = target_clock * prescale; |
| frank26080115 | 0:84d7747641aa | 70 | if (temp >= spi_pclk){ |
| frank26080115 | 0:84d7747641aa | 71 | break; |
| frank26080115 | 0:84d7747641aa | 72 | } |
| frank26080115 | 0:84d7747641aa | 73 | prescale += 2; |
| frank26080115 | 0:84d7747641aa | 74 | if(prescale >= 254){ |
| frank26080115 | 0:84d7747641aa | 75 | break; |
| frank26080115 | 0:84d7747641aa | 76 | } |
| frank26080115 | 0:84d7747641aa | 77 | } |
| frank26080115 | 0:84d7747641aa | 78 | |
| frank26080115 | 0:84d7747641aa | 79 | // Write to register |
| frank26080115 | 0:84d7747641aa | 80 | SPIx->SPCCR = SPI_SPCCR_COUNTER(prescale); |
| frank26080115 | 0:84d7747641aa | 81 | } |
| frank26080115 | 0:84d7747641aa | 82 | |
| frank26080115 | 0:84d7747641aa | 83 | |
| frank26080115 | 0:84d7747641aa | 84 | /*********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 85 | * @brief De-initializes the SPIx peripheral registers to their |
| frank26080115 | 0:84d7747641aa | 86 | * default reset values. |
| frank26080115 | 0:84d7747641aa | 87 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 88 | * @return None |
| frank26080115 | 0:84d7747641aa | 89 | **********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 90 | void SPI_DeInit(LPC_SPI_TypeDef *SPIx) |
| frank26080115 | 0:84d7747641aa | 91 | { |
| frank26080115 | 0:84d7747641aa | 92 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 93 | |
| frank26080115 | 0:84d7747641aa | 94 | if (SPIx == LPC_SPI){ |
| frank26080115 | 0:84d7747641aa | 95 | /* Set up clock and power for SPI module */ |
| frank26080115 | 0:84d7747641aa | 96 | CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSPI, DISABLE); |
| frank26080115 | 0:84d7747641aa | 97 | } |
| frank26080115 | 0:84d7747641aa | 98 | } |
| frank26080115 | 0:84d7747641aa | 99 | |
| frank26080115 | 0:84d7747641aa | 100 | /*********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 101 | * @brief Get data bit size per transfer |
| frank26080115 | 0:84d7747641aa | 102 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 103 | * @return number of bit per transfer, could be 8-16 |
| frank26080115 | 0:84d7747641aa | 104 | **********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 105 | uint8_t SPI_GetDataSize (LPC_SPI_TypeDef *SPIx) |
| frank26080115 | 0:84d7747641aa | 106 | { |
| frank26080115 | 0:84d7747641aa | 107 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 108 | return ((SPIx->SPCR)>>8 & 0xF); |
| frank26080115 | 0:84d7747641aa | 109 | } |
| frank26080115 | 0:84d7747641aa | 110 | |
| frank26080115 | 0:84d7747641aa | 111 | /********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 112 | * @brief Initializes the SPIx peripheral according to the specified |
| frank26080115 | 0:84d7747641aa | 113 | * parameters in the UART_ConfigStruct. |
| frank26080115 | 0:84d7747641aa | 114 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 115 | * @param[in] SPI_ConfigStruct Pointer to a SPI_CFG_Type structure |
| frank26080115 | 0:84d7747641aa | 116 | * that contains the configuration information for the |
| frank26080115 | 0:84d7747641aa | 117 | * specified SPI peripheral. |
| frank26080115 | 0:84d7747641aa | 118 | * @return None |
| frank26080115 | 0:84d7747641aa | 119 | *********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 120 | void SPI_Init(LPC_SPI_TypeDef *SPIx, SPI_CFG_Type *SPI_ConfigStruct) |
| frank26080115 | 0:84d7747641aa | 121 | { |
| frank26080115 | 0:84d7747641aa | 122 | uint32_t tmp; |
| frank26080115 | 0:84d7747641aa | 123 | |
| frank26080115 | 0:84d7747641aa | 124 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 125 | |
| frank26080115 | 0:84d7747641aa | 126 | if(SPIx == LPC_SPI){ |
| frank26080115 | 0:84d7747641aa | 127 | /* Set up clock and power for UART module */ |
| frank26080115 | 0:84d7747641aa | 128 | CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCSPI, ENABLE); |
| frank26080115 | 0:84d7747641aa | 129 | } else { |
| frank26080115 | 0:84d7747641aa | 130 | return; |
| frank26080115 | 0:84d7747641aa | 131 | } |
| frank26080115 | 0:84d7747641aa | 132 | |
| frank26080115 | 0:84d7747641aa | 133 | // Configure SPI, interrupt is disable as default |
| frank26080115 | 0:84d7747641aa | 134 | tmp = ((SPI_ConfigStruct->CPHA) | (SPI_ConfigStruct->CPOL) \ |
| frank26080115 | 0:84d7747641aa | 135 | | (SPI_ConfigStruct->DataOrder) | (SPI_ConfigStruct->Databit) \ |
| frank26080115 | 0:84d7747641aa | 136 | | (SPI_ConfigStruct->Mode) | SPI_SPCR_BIT_EN) & SPI_SPCR_BITMASK; |
| frank26080115 | 0:84d7747641aa | 137 | // write back to SPI control register |
| frank26080115 | 0:84d7747641aa | 138 | SPIx->SPCR = tmp; |
| frank26080115 | 0:84d7747641aa | 139 | |
| frank26080115 | 0:84d7747641aa | 140 | // Set clock rate for SPI peripheral |
| frank26080115 | 0:84d7747641aa | 141 | SPI_SetClock(SPIx, SPI_ConfigStruct->ClockRate); |
| frank26080115 | 0:84d7747641aa | 142 | |
| frank26080115 | 0:84d7747641aa | 143 | // If interrupt flag is set, Write '1' to Clear interrupt flag |
| frank26080115 | 0:84d7747641aa | 144 | if (SPIx->SPINT & SPI_SPINT_INTFLAG){ |
| frank26080115 | 0:84d7747641aa | 145 | SPIx->SPINT = SPI_SPINT_INTFLAG; |
| frank26080115 | 0:84d7747641aa | 146 | } |
| frank26080115 | 0:84d7747641aa | 147 | } |
| frank26080115 | 0:84d7747641aa | 148 | |
| frank26080115 | 0:84d7747641aa | 149 | |
| frank26080115 | 0:84d7747641aa | 150 | |
| frank26080115 | 0:84d7747641aa | 151 | /*****************************************************************************//** |
| frank26080115 | 0:84d7747641aa | 152 | * @brief Fills each SPI_InitStruct member with its default value: |
| frank26080115 | 0:84d7747641aa | 153 | * - CPHA = SPI_CPHA_FIRST |
| frank26080115 | 0:84d7747641aa | 154 | * - CPOL = SPI_CPOL_HI |
| frank26080115 | 0:84d7747641aa | 155 | * - ClockRate = 1000000 |
| frank26080115 | 0:84d7747641aa | 156 | * - DataOrder = SPI_DATA_MSB_FIRST |
| frank26080115 | 0:84d7747641aa | 157 | * - Databit = SPI_DATABIT_8 |
| frank26080115 | 0:84d7747641aa | 158 | * - Mode = SPI_MASTER_MODE |
| frank26080115 | 0:84d7747641aa | 159 | * @param[in] SPI_InitStruct Pointer to a SPI_CFG_Type structure |
| frank26080115 | 0:84d7747641aa | 160 | * which will be initialized. |
| frank26080115 | 0:84d7747641aa | 161 | * @return None |
| frank26080115 | 0:84d7747641aa | 162 | *******************************************************************************/ |
| frank26080115 | 0:84d7747641aa | 163 | void SPI_ConfigStructInit(SPI_CFG_Type *SPI_InitStruct) |
| frank26080115 | 0:84d7747641aa | 164 | { |
| frank26080115 | 0:84d7747641aa | 165 | SPI_InitStruct->CPHA = SPI_CPHA_FIRST; |
| frank26080115 | 0:84d7747641aa | 166 | SPI_InitStruct->CPOL = SPI_CPOL_HI; |
| frank26080115 | 0:84d7747641aa | 167 | SPI_InitStruct->ClockRate = 1000000; |
| frank26080115 | 0:84d7747641aa | 168 | SPI_InitStruct->DataOrder = SPI_DATA_MSB_FIRST; |
| frank26080115 | 0:84d7747641aa | 169 | SPI_InitStruct->Databit = SPI_DATABIT_8; |
| frank26080115 | 0:84d7747641aa | 170 | SPI_InitStruct->Mode = SPI_MASTER_MODE; |
| frank26080115 | 0:84d7747641aa | 171 | } |
| frank26080115 | 0:84d7747641aa | 172 | |
| frank26080115 | 0:84d7747641aa | 173 | /*********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 174 | * @brief Transmit a single data through SPIx peripheral |
| frank26080115 | 0:84d7747641aa | 175 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 176 | * @param[in] Data Data to transmit (must be 16 or 8-bit long, |
| frank26080115 | 0:84d7747641aa | 177 | * this depend on SPI data bit number configured) |
| frank26080115 | 0:84d7747641aa | 178 | * @return none |
| frank26080115 | 0:84d7747641aa | 179 | **********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 180 | void SPI_SendData(LPC_SPI_TypeDef* SPIx, uint16_t Data) |
| frank26080115 | 0:84d7747641aa | 181 | { |
| frank26080115 | 0:84d7747641aa | 182 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 183 | |
| frank26080115 | 0:84d7747641aa | 184 | SPIx->SPDR = Data & SPI_SPDR_BITMASK; |
| frank26080115 | 0:84d7747641aa | 185 | } |
| frank26080115 | 0:84d7747641aa | 186 | |
| frank26080115 | 0:84d7747641aa | 187 | |
| frank26080115 | 0:84d7747641aa | 188 | |
| frank26080115 | 0:84d7747641aa | 189 | /*********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 190 | * @brief Receive a single data from SPIx peripheral |
| frank26080115 | 0:84d7747641aa | 191 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 192 | * @return Data received (16-bit long) |
| frank26080115 | 0:84d7747641aa | 193 | **********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 194 | uint16_t SPI_ReceiveData(LPC_SPI_TypeDef* SPIx) |
| frank26080115 | 0:84d7747641aa | 195 | { |
| frank26080115 | 0:84d7747641aa | 196 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 197 | |
| frank26080115 | 0:84d7747641aa | 198 | return ((uint16_t) (SPIx->SPDR & SPI_SPDR_BITMASK)); |
| frank26080115 | 0:84d7747641aa | 199 | } |
| frank26080115 | 0:84d7747641aa | 200 | |
| frank26080115 | 0:84d7747641aa | 201 | /*********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 202 | * @brief SPI Read write data function |
| frank26080115 | 0:84d7747641aa | 203 | * @param[in] SPIx Pointer to SPI peripheral, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 204 | * @param[in] dataCfg Pointer to a SPI_DATA_SETUP_Type structure that |
| frank26080115 | 0:84d7747641aa | 205 | * contains specified information about transmit |
| frank26080115 | 0:84d7747641aa | 206 | * data configuration. |
| frank26080115 | 0:84d7747641aa | 207 | * @param[in] xfType Transfer type, should be: |
| frank26080115 | 0:84d7747641aa | 208 | * - SPI_TRANSFER_POLLING: Polling mode |
| frank26080115 | 0:84d7747641aa | 209 | * - SPI_TRANSFER_INTERRUPT: Interrupt mode |
| frank26080115 | 0:84d7747641aa | 210 | * @return Actual Data length has been transferred in polling mode. |
| frank26080115 | 0:84d7747641aa | 211 | * In interrupt mode, always return (0) |
| frank26080115 | 0:84d7747641aa | 212 | * Return (-1) if error. |
| frank26080115 | 0:84d7747641aa | 213 | * Note: This function can be used in both master and slave mode. |
| frank26080115 | 0:84d7747641aa | 214 | ***********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 215 | int32_t SPI_ReadWrite (LPC_SPI_TypeDef *SPIx, SPI_DATA_SETUP_Type *dataCfg, \ |
| frank26080115 | 0:84d7747641aa | 216 | SPI_TRANSFER_Type xfType) |
| frank26080115 | 0:84d7747641aa | 217 | { |
| frank26080115 | 0:84d7747641aa | 218 | uint8_t *rdata8 = 0; |
| frank26080115 | 0:84d7747641aa | 219 | uint8_t *wdata8 = 0; |
| frank26080115 | 0:84d7747641aa | 220 | uint16_t *rdata16 = 0; |
| frank26080115 | 0:84d7747641aa | 221 | uint16_t *wdata16 = 0; |
| frank26080115 | 0:84d7747641aa | 222 | uint32_t stat = 0; |
| frank26080115 | 0:84d7747641aa | 223 | uint32_t temp; |
| frank26080115 | 0:84d7747641aa | 224 | uint8_t dataword; |
| frank26080115 | 0:84d7747641aa | 225 | |
| frank26080115 | 0:84d7747641aa | 226 | //read for empty buffer |
| frank26080115 | 0:84d7747641aa | 227 | temp = SPIx->SPDR; |
| frank26080115 | 0:84d7747641aa | 228 | //dummy to clear status |
| frank26080115 | 0:84d7747641aa | 229 | temp = SPIx->SPSR; |
| frank26080115 | 0:84d7747641aa | 230 | dataCfg->counter = 0; |
| frank26080115 | 0:84d7747641aa | 231 | dataCfg->status = 0; |
| frank26080115 | 0:84d7747641aa | 232 | |
| frank26080115 | 0:84d7747641aa | 233 | if(SPI_GetDataSize (SPIx) == 8) |
| frank26080115 | 0:84d7747641aa | 234 | dataword = 0; |
| frank26080115 | 0:84d7747641aa | 235 | else dataword = 1; |
| frank26080115 | 0:84d7747641aa | 236 | if (xfType == SPI_TRANSFER_POLLING){ |
| frank26080115 | 0:84d7747641aa | 237 | |
| frank26080115 | 0:84d7747641aa | 238 | if (dataword == 0){ |
| frank26080115 | 0:84d7747641aa | 239 | rdata8 = (uint8_t *)dataCfg->rx_data; |
| frank26080115 | 0:84d7747641aa | 240 | wdata8 = (uint8_t *)dataCfg->tx_data; |
| frank26080115 | 0:84d7747641aa | 241 | } else { |
| frank26080115 | 0:84d7747641aa | 242 | rdata16 = (uint16_t *)dataCfg->rx_data; |
| frank26080115 | 0:84d7747641aa | 243 | wdata16 = (uint16_t *)dataCfg->tx_data; |
| frank26080115 | 0:84d7747641aa | 244 | } |
| frank26080115 | 0:84d7747641aa | 245 | |
| frank26080115 | 0:84d7747641aa | 246 | while(dataCfg->counter < dataCfg->length) |
| frank26080115 | 0:84d7747641aa | 247 | { |
| frank26080115 | 0:84d7747641aa | 248 | // Write data to buffer |
| frank26080115 | 0:84d7747641aa | 249 | if(dataCfg->tx_data == NULL){ |
| frank26080115 | 0:84d7747641aa | 250 | if (dataword == 0){ |
| frank26080115 | 0:84d7747641aa | 251 | SPI_SendData(SPIx, 0xFF); |
| frank26080115 | 0:84d7747641aa | 252 | } else { |
| frank26080115 | 0:84d7747641aa | 253 | SPI_SendData(SPIx, 0xFFFF); |
| frank26080115 | 0:84d7747641aa | 254 | } |
| frank26080115 | 0:84d7747641aa | 255 | } else { |
| frank26080115 | 0:84d7747641aa | 256 | if (dataword == 0){ |
| frank26080115 | 0:84d7747641aa | 257 | SPI_SendData(SPIx, *wdata8); |
| frank26080115 | 0:84d7747641aa | 258 | wdata8++; |
| frank26080115 | 0:84d7747641aa | 259 | } else { |
| frank26080115 | 0:84d7747641aa | 260 | SPI_SendData(SPIx, *wdata16); |
| frank26080115 | 0:84d7747641aa | 261 | wdata16++; |
| frank26080115 | 0:84d7747641aa | 262 | } |
| frank26080115 | 0:84d7747641aa | 263 | } |
| frank26080115 | 0:84d7747641aa | 264 | // Wait for transfer complete |
| frank26080115 | 0:84d7747641aa | 265 | while (!((stat = SPIx->SPSR) & SPI_SPSR_SPIF)); |
| frank26080115 | 0:84d7747641aa | 266 | // Check for error |
| frank26080115 | 0:84d7747641aa | 267 | if (stat & (SPI_SPSR_ABRT | SPI_SPSR_MODF | SPI_SPSR_ROVR | SPI_SPSR_WCOL)){ |
| frank26080115 | 0:84d7747641aa | 268 | // save status |
| frank26080115 | 0:84d7747641aa | 269 | dataCfg->status = stat | SPI_STAT_ERROR; |
| frank26080115 | 0:84d7747641aa | 270 | return (dataCfg->counter); |
| frank26080115 | 0:84d7747641aa | 271 | } |
| frank26080115 | 0:84d7747641aa | 272 | // Read data from SPI dat |
| frank26080115 | 0:84d7747641aa | 273 | temp = (uint32_t) SPI_ReceiveData(SPIx); |
| frank26080115 | 0:84d7747641aa | 274 | |
| frank26080115 | 0:84d7747641aa | 275 | // Store data to destination |
| frank26080115 | 0:84d7747641aa | 276 | if (dataCfg->rx_data != NULL) |
| frank26080115 | 0:84d7747641aa | 277 | { |
| frank26080115 | 0:84d7747641aa | 278 | if (dataword == 0){ |
| frank26080115 | 0:84d7747641aa | 279 | *(rdata8) = (uint8_t) temp; |
| frank26080115 | 0:84d7747641aa | 280 | rdata8++; |
| frank26080115 | 0:84d7747641aa | 281 | } else { |
| frank26080115 | 0:84d7747641aa | 282 | *(rdata16) = (uint16_t) temp; |
| frank26080115 | 0:84d7747641aa | 283 | rdata16++; |
| frank26080115 | 0:84d7747641aa | 284 | } |
| frank26080115 | 0:84d7747641aa | 285 | } |
| frank26080115 | 0:84d7747641aa | 286 | // Increase counter |
| frank26080115 | 0:84d7747641aa | 287 | if (dataword == 0){ |
| frank26080115 | 0:84d7747641aa | 288 | dataCfg->counter++; |
| frank26080115 | 0:84d7747641aa | 289 | } else { |
| frank26080115 | 0:84d7747641aa | 290 | dataCfg->counter += 2; |
| frank26080115 | 0:84d7747641aa | 291 | } |
| frank26080115 | 0:84d7747641aa | 292 | } |
| frank26080115 | 0:84d7747641aa | 293 | |
| frank26080115 | 0:84d7747641aa | 294 | // Return length of actual data transferred |
| frank26080115 | 0:84d7747641aa | 295 | // save status |
| frank26080115 | 0:84d7747641aa | 296 | dataCfg->status = stat | SPI_STAT_DONE; |
| frank26080115 | 0:84d7747641aa | 297 | return (dataCfg->counter); |
| frank26080115 | 0:84d7747641aa | 298 | } |
| frank26080115 | 0:84d7747641aa | 299 | // Interrupt mode |
| frank26080115 | 0:84d7747641aa | 300 | else { |
| frank26080115 | 0:84d7747641aa | 301 | |
| frank26080115 | 0:84d7747641aa | 302 | // Check if interrupt flag is already set |
| frank26080115 | 0:84d7747641aa | 303 | if(SPIx->SPINT & SPI_SPINT_INTFLAG){ |
| frank26080115 | 0:84d7747641aa | 304 | SPIx->SPINT = SPI_SPINT_INTFLAG; |
| frank26080115 | 0:84d7747641aa | 305 | } |
| frank26080115 | 0:84d7747641aa | 306 | if (dataCfg->counter < dataCfg->length){ |
| frank26080115 | 0:84d7747641aa | 307 | // Write data to buffer |
| frank26080115 | 0:84d7747641aa | 308 | if(dataCfg->tx_data == NULL){ |
| frank26080115 | 0:84d7747641aa | 309 | if (dataword == 0){ |
| frank26080115 | 0:84d7747641aa | 310 | SPI_SendData(SPIx, 0xFF); |
| frank26080115 | 0:84d7747641aa | 311 | } else { |
| frank26080115 | 0:84d7747641aa | 312 | SPI_SendData(SPIx, 0xFFFF); |
| frank26080115 | 0:84d7747641aa | 313 | } |
| frank26080115 | 0:84d7747641aa | 314 | } else { |
| frank26080115 | 0:84d7747641aa | 315 | if (dataword == 0){ |
| frank26080115 | 0:84d7747641aa | 316 | SPI_SendData(SPIx, (*(uint8_t *)dataCfg->tx_data)); |
| frank26080115 | 0:84d7747641aa | 317 | } else { |
| frank26080115 | 0:84d7747641aa | 318 | SPI_SendData(SPIx, (*(uint16_t *)dataCfg->tx_data)); |
| frank26080115 | 0:84d7747641aa | 319 | } |
| frank26080115 | 0:84d7747641aa | 320 | } |
| frank26080115 | 0:84d7747641aa | 321 | SPI_IntCmd(SPIx, ENABLE); |
| frank26080115 | 0:84d7747641aa | 322 | } else { |
| frank26080115 | 0:84d7747641aa | 323 | // Save status |
| frank26080115 | 0:84d7747641aa | 324 | dataCfg->status = SPI_STAT_DONE; |
| frank26080115 | 0:84d7747641aa | 325 | } |
| frank26080115 | 0:84d7747641aa | 326 | return (0); |
| frank26080115 | 0:84d7747641aa | 327 | } |
| frank26080115 | 0:84d7747641aa | 328 | } |
| frank26080115 | 0:84d7747641aa | 329 | |
| frank26080115 | 0:84d7747641aa | 330 | |
| frank26080115 | 0:84d7747641aa | 331 | /********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 332 | * @brief Enable or disable SPIx interrupt. |
| frank26080115 | 0:84d7747641aa | 333 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 334 | * @param[in] NewState New state of specified UART interrupt type, |
| frank26080115 | 0:84d7747641aa | 335 | * should be: |
| frank26080115 | 0:84d7747641aa | 336 | * - ENALBE: Enable this SPI interrupt. |
| frank26080115 | 0:84d7747641aa | 337 | * - DISALBE: Disable this SPI interrupt. |
| frank26080115 | 0:84d7747641aa | 338 | * @return None |
| frank26080115 | 0:84d7747641aa | 339 | *********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 340 | void SPI_IntCmd(LPC_SPI_TypeDef *SPIx, FunctionalState NewState) |
| frank26080115 | 0:84d7747641aa | 341 | { |
| frank26080115 | 0:84d7747641aa | 342 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 343 | CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState)); |
| frank26080115 | 0:84d7747641aa | 344 | |
| frank26080115 | 0:84d7747641aa | 345 | if (NewState == ENABLE) |
| frank26080115 | 0:84d7747641aa | 346 | { |
| frank26080115 | 0:84d7747641aa | 347 | SPIx->SPCR |= SPI_SPCR_SPIE; |
| frank26080115 | 0:84d7747641aa | 348 | } |
| frank26080115 | 0:84d7747641aa | 349 | else |
| frank26080115 | 0:84d7747641aa | 350 | { |
| frank26080115 | 0:84d7747641aa | 351 | SPIx->SPCR &= (~SPI_SPCR_SPIE) & SPI_SPCR_BITMASK; |
| frank26080115 | 0:84d7747641aa | 352 | } |
| frank26080115 | 0:84d7747641aa | 353 | } |
| frank26080115 | 0:84d7747641aa | 354 | |
| frank26080115 | 0:84d7747641aa | 355 | |
| frank26080115 | 0:84d7747641aa | 356 | /********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 357 | * @brief Checks whether the SPI interrupt flag is set or not. |
| frank26080115 | 0:84d7747641aa | 358 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 359 | * @return The new state of SPI Interrupt Flag (SET or RESET) |
| frank26080115 | 0:84d7747641aa | 360 | *********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 361 | IntStatus SPI_GetIntStatus (LPC_SPI_TypeDef *SPIx) |
| frank26080115 | 0:84d7747641aa | 362 | { |
| frank26080115 | 0:84d7747641aa | 363 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 364 | |
| frank26080115 | 0:84d7747641aa | 365 | return ((SPIx->SPINT & SPI_SPINT_INTFLAG) ? SET : RESET); |
| frank26080115 | 0:84d7747641aa | 366 | } |
| frank26080115 | 0:84d7747641aa | 367 | |
| frank26080115 | 0:84d7747641aa | 368 | /********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 369 | * @brief Clear SPI interrupt flag. |
| frank26080115 | 0:84d7747641aa | 370 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 371 | * @return None |
| frank26080115 | 0:84d7747641aa | 372 | *********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 373 | void SPI_ClearIntPending(LPC_SPI_TypeDef *SPIx) |
| frank26080115 | 0:84d7747641aa | 374 | { |
| frank26080115 | 0:84d7747641aa | 375 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 376 | |
| frank26080115 | 0:84d7747641aa | 377 | SPIx->SPINT = SPI_SPINT_INTFLAG; |
| frank26080115 | 0:84d7747641aa | 378 | } |
| frank26080115 | 0:84d7747641aa | 379 | |
| frank26080115 | 0:84d7747641aa | 380 | /********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 381 | * @brief Get current value of SPI Status register in SPIx peripheral. |
| frank26080115 | 0:84d7747641aa | 382 | * @param[in] SPIx SPI peripheral selected, should be LPC_SPI |
| frank26080115 | 0:84d7747641aa | 383 | * @return Current value of SPI Status register in SPI peripheral. |
| frank26080115 | 0:84d7747641aa | 384 | * Note: The return value of this function must be used with |
| frank26080115 | 0:84d7747641aa | 385 | * SPI_CheckStatus() to determine current flag status |
| frank26080115 | 0:84d7747641aa | 386 | * corresponding to each SPI status type. Because some flags in |
| frank26080115 | 0:84d7747641aa | 387 | * SPI Status register will be cleared after reading, the next reading |
| frank26080115 | 0:84d7747641aa | 388 | * SPI Status register could not be correct. So this function used to |
| frank26080115 | 0:84d7747641aa | 389 | * read SPI status register in one time only, then the return value |
| frank26080115 | 0:84d7747641aa | 390 | * used to check all flags. |
| frank26080115 | 0:84d7747641aa | 391 | *********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 392 | uint32_t SPI_GetStatus(LPC_SPI_TypeDef* SPIx) |
| frank26080115 | 0:84d7747641aa | 393 | { |
| frank26080115 | 0:84d7747641aa | 394 | CHECK_PARAM(PARAM_SPIx(SPIx)); |
| frank26080115 | 0:84d7747641aa | 395 | |
| frank26080115 | 0:84d7747641aa | 396 | return (SPIx->SPSR & SPI_SPSR_BITMASK); |
| frank26080115 | 0:84d7747641aa | 397 | } |
| frank26080115 | 0:84d7747641aa | 398 | |
| frank26080115 | 0:84d7747641aa | 399 | /********************************************************************//** |
| frank26080115 | 0:84d7747641aa | 400 | * @brief Checks whether the specified SPI Status flag is set or not |
| frank26080115 | 0:84d7747641aa | 401 | * via inputSPIStatus parameter. |
| frank26080115 | 0:84d7747641aa | 402 | * @param[in] inputSPIStatus Value to check status of each flag type. |
| frank26080115 | 0:84d7747641aa | 403 | * This value is the return value from SPI_GetStatus(). |
| frank26080115 | 0:84d7747641aa | 404 | * @param[in] SPIStatus Specifies the SPI status flag to check, |
| frank26080115 | 0:84d7747641aa | 405 | * should be one of the following: |
| frank26080115 | 0:84d7747641aa | 406 | - SPI_STAT_ABRT: Slave abort. |
| frank26080115 | 0:84d7747641aa | 407 | - SPI_STAT_MODF: Mode fault. |
| frank26080115 | 0:84d7747641aa | 408 | - SPI_STAT_ROVR: Read overrun. |
| frank26080115 | 0:84d7747641aa | 409 | - SPI_STAT_WCOL: Write collision. |
| frank26080115 | 0:84d7747641aa | 410 | - SPI_STAT_SPIF: SPI transfer complete. |
| frank26080115 | 0:84d7747641aa | 411 | * @return The new state of SPIStatus (SET or RESET) |
| frank26080115 | 0:84d7747641aa | 412 | *********************************************************************/ |
| frank26080115 | 0:84d7747641aa | 413 | FlagStatus SPI_CheckStatus (uint32_t inputSPIStatus, uint8_t SPIStatus) |
| frank26080115 | 0:84d7747641aa | 414 | { |
| frank26080115 | 0:84d7747641aa | 415 | CHECK_PARAM(PARAM_SPI_STAT(SPIStatus)); |
| frank26080115 | 0:84d7747641aa | 416 | |
| frank26080115 | 0:84d7747641aa | 417 | return ((inputSPIStatus & SPIStatus) ? SET : RESET); |
| frank26080115 | 0:84d7747641aa | 418 | } |
| frank26080115 | 0:84d7747641aa | 419 | |
| frank26080115 | 0:84d7747641aa | 420 | |
| frank26080115 | 0:84d7747641aa | 421 | /** |
| frank26080115 | 0:84d7747641aa | 422 | * @} |
| frank26080115 | 0:84d7747641aa | 423 | */ |
| frank26080115 | 0:84d7747641aa | 424 | |
| frank26080115 | 0:84d7747641aa | 425 | #endif /* _SPI */ |
| frank26080115 | 0:84d7747641aa | 426 | |
| frank26080115 | 0:84d7747641aa | 427 | /** |
| frank26080115 | 0:84d7747641aa | 428 | * @} |
| frank26080115 | 0:84d7747641aa | 429 | */ |
| frank26080115 | 0:84d7747641aa | 430 | |
| frank26080115 | 0:84d7747641aa | 431 | /* --------------------------------- End Of File ------------------------------ */ |