Janek Mann / mbed-src-openwear

mbed library sources modified for open wear

Dependents:   openwear-lifelogger-example

Fork of mbed-src by mbed official

targets/hal/TARGET_NORDIC/TARGET_NRF51822/spi_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
227:7bd0639b8911
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 85:e1a8e879a6a9 1 /* mbed Microcontroller Library
mbed_official 104:a6a92e2e5a92 2 * Copyright (c) 2013 Nordic Semiconductor
mbed_official 85:e1a8e879a6a9 3 *
mbed_official 85:e1a8e879a6a9 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 85:e1a8e879a6a9 5 * you may not use this file except in compliance with the License.
mbed_official 85:e1a8e879a6a9 6 * You may obtain a copy of the License at
mbed_official 85:e1a8e879a6a9 7 *
mbed_official 85:e1a8e879a6a9 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 85:e1a8e879a6a9 9 *
mbed_official 85:e1a8e879a6a9 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 85:e1a8e879a6a9 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 85:e1a8e879a6a9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 85:e1a8e879a6a9 13 * See the License for the specific language governing permissions and
mbed_official 85:e1a8e879a6a9 14 * limitations under the License.
mbed_official 85:e1a8e879a6a9 15 */
mbed_official 85:e1a8e879a6a9 16 //#include <math.h>
mbed_official 227:7bd0639b8911 17 #include "mbed_assert.h"
mbed_official 85:e1a8e879a6a9 18 #include "spi_api.h"
mbed_official 85:e1a8e879a6a9 19 #include "cmsis.h"
mbed_official 85:e1a8e879a6a9 20 #include "pinmap.h"
mbed_official 250:a49055e7a707 21 #include "mbed_error.h"
mbed_official 85:e1a8e879a6a9 22
mbed_official 85:e1a8e879a6a9 23 static const PinMap PinMap_SPI_SCLK[] = {
mbed_official 85:e1a8e879a6a9 24 {SPI_PSELSCK0 , SPI_0, 0x01},
mbed_official 85:e1a8e879a6a9 25 {SPI_PSELSCK1, SPI_1, 0x02},
mbed_official 227:7bd0639b8911 26 {SPIS_PSELSCK, SPIS, 0x03},
mbed_official 85:e1a8e879a6a9 27 {NC , NC , 0}
mbed_official 85:e1a8e879a6a9 28 };
mbed_official 85:e1a8e879a6a9 29
mbed_official 85:e1a8e879a6a9 30 static const PinMap PinMap_SPI_MOSI[] = {
mbed_official 85:e1a8e879a6a9 31 {SPI_PSELMOSI0 , SPI_0, 0x01},
mbed_official 85:e1a8e879a6a9 32 {SPI_PSELMOSI1, SPI_1, 0x02},
mbed_official 85:e1a8e879a6a9 33 {SPIS_PSELMOSI, SPIS, 0x03},
mbed_official 85:e1a8e879a6a9 34 {NC , NC , 0}
mbed_official 85:e1a8e879a6a9 35 };
mbed_official 85:e1a8e879a6a9 36
mbed_official 85:e1a8e879a6a9 37 static const PinMap PinMap_SPI_MISO[] = {
mbed_official 85:e1a8e879a6a9 38 {SPI_PSELMISO0 , SPI_0, 0x01},
mbed_official 85:e1a8e879a6a9 39 {SPI_PSELMISO1, SPI_1, 0x02},
mbed_official 85:e1a8e879a6a9 40 {SPIS_PSELMISO, SPIS, 0x03},
mbed_official 85:e1a8e879a6a9 41 {NC , NC , 0}
mbed_official 85:e1a8e879a6a9 42 };
mbed_official 85:e1a8e879a6a9 43
mbed_official 85:e1a8e879a6a9 44 static const PinMap PinMap_SPI_SSEL[] = {
mbed_official 85:e1a8e879a6a9 45 {SPIS_PSELSS, SPIS, 0x03},
mbed_official 85:e1a8e879a6a9 46 {NC , NC , 0}
mbed_official 85:e1a8e879a6a9 47 };
mbed_official 85:e1a8e879a6a9 48 // {SPI_PSELSS0 , SPI_0, 0x01},
mbed_official 85:e1a8e879a6a9 49 #define SPIS_MESSAGE_SIZE 1
mbed_official 85:e1a8e879a6a9 50 volatile uint8_t m_tx_buf[SPIS_MESSAGE_SIZE] = {0};
mbed_official 85:e1a8e879a6a9 51 volatile uint8_t m_rx_buf[SPIS_MESSAGE_SIZE] = {0};
mbed_official 85:e1a8e879a6a9 52
mbed_official 85:e1a8e879a6a9 53
mbed_official 85:e1a8e879a6a9 54 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) {
mbed_official 85:e1a8e879a6a9 55 // determine the SPI to use
mbed_official 85:e1a8e879a6a9 56 SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
mbed_official 85:e1a8e879a6a9 57 SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
mbed_official 85:e1a8e879a6a9 58 SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
mbed_official 85:e1a8e879a6a9 59 SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
mbed_official 85:e1a8e879a6a9 60 SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
mbed_official 85:e1a8e879a6a9 61 SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
mbed_official 85:e1a8e879a6a9 62 SPIName spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
mbed_official 227:7bd0639b8911 63 //SPIName
mbed_official 85:e1a8e879a6a9 64 if(ssel==NC){
mbed_official 85:e1a8e879a6a9 65 obj->spi = (NRF_SPI_Type*)spi;
mbed_official 85:e1a8e879a6a9 66 obj->spis = (NRF_SPIS_Type*)NC;
mbed_official 85:e1a8e879a6a9 67 }
mbed_official 85:e1a8e879a6a9 68 else{
mbed_official 85:e1a8e879a6a9 69 obj->spi = (NRF_SPI_Type*)NC;
mbed_official 227:7bd0639b8911 70 obj->spis = (NRF_SPIS_Type*)spi;
mbed_official 85:e1a8e879a6a9 71 }
mbed_official 227:7bd0639b8911 72 MBED_ASSERT((int)obj->spi != NC && (int)obj->spis != NC);
mbed_official 227:7bd0639b8911 73
mbed_official 227:7bd0639b8911 74 // pin out the spi pins
mbed_official 85:e1a8e879a6a9 75 if (ssel != NC) {//slave
mbed_official 85:e1a8e879a6a9 76 obj->spis->POWER=0;
mbed_official 85:e1a8e879a6a9 77 obj->spis->POWER=1;
mbed_official 85:e1a8e879a6a9 78
mbed_official 85:e1a8e879a6a9 79 NRF_GPIO->PIN_CNF[mosi] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
mbed_official 85:e1a8e879a6a9 80 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
mbed_official 85:e1a8e879a6a9 81 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
mbed_official 85:e1a8e879a6a9 82 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
mbed_official 85:e1a8e879a6a9 83 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
mbed_official 85:e1a8e879a6a9 84 NRF_GPIO->PIN_CNF[miso] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
mbed_official 85:e1a8e879a6a9 85 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
mbed_official 85:e1a8e879a6a9 86 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
mbed_official 85:e1a8e879a6a9 87 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
mbed_official 85:e1a8e879a6a9 88 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
mbed_official 85:e1a8e879a6a9 89 NRF_GPIO->PIN_CNF[sclk] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
mbed_official 85:e1a8e879a6a9 90 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
mbed_official 85:e1a8e879a6a9 91 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
mbed_official 85:e1a8e879a6a9 92 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
mbed_official 85:e1a8e879a6a9 93 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
mbed_official 85:e1a8e879a6a9 94 NRF_GPIO->PIN_CNF[ssel] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
mbed_official 85:e1a8e879a6a9 95 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
mbed_official 85:e1a8e879a6a9 96 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
mbed_official 85:e1a8e879a6a9 97 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
mbed_official 85:e1a8e879a6a9 98 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
mbed_official 85:e1a8e879a6a9 99
mbed_official 85:e1a8e879a6a9 100 obj->spis->PSELMOSI = mosi;
mbed_official 85:e1a8e879a6a9 101 obj->spis->PSELMISO = miso;
mbed_official 85:e1a8e879a6a9 102 obj->spis->PSELSCK = sclk;
mbed_official 85:e1a8e879a6a9 103 obj->spis->PSELCSN = ssel;
mbed_official 85:e1a8e879a6a9 104
mbed_official 85:e1a8e879a6a9 105 obj->spis->EVENTS_END=0;
mbed_official 85:e1a8e879a6a9 106 obj->spis->EVENTS_ACQUIRED=0;
mbed_official 85:e1a8e879a6a9 107 obj->spis->MAXRX=SPIS_MESSAGE_SIZE;
mbed_official 85:e1a8e879a6a9 108 obj->spis->MAXTX=SPIS_MESSAGE_SIZE;
mbed_official 85:e1a8e879a6a9 109 obj->spis->TXDPTR = (uint32_t)&m_tx_buf[0];
mbed_official 227:7bd0639b8911 110 obj->spis->RXDPTR = (uint32_t)&m_rx_buf[0];
mbed_official 85:e1a8e879a6a9 111 obj->spis->SHORTS = (SPIS_SHORTS_END_ACQUIRE_Enabled<<SPIS_SHORTS_END_ACQUIRE_Pos);
mbed_official 85:e1a8e879a6a9 112
mbed_official 85:e1a8e879a6a9 113 spi_format(obj, 8, 0, 1); // 8 bits, mode 0, slave
mbed_official 85:e1a8e879a6a9 114 }
mbed_official 85:e1a8e879a6a9 115 else{//master
mbed_official 85:e1a8e879a6a9 116 obj->spi->POWER=0;
mbed_official 85:e1a8e879a6a9 117 obj->spi->POWER=1;
mbed_official 85:e1a8e879a6a9 118
mbed_official 227:7bd0639b8911 119 //NRF_GPIO->DIR |= (1<<mosi);
mbed_official 85:e1a8e879a6a9 120 NRF_GPIO->PIN_CNF[mosi] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
mbed_official 85:e1a8e879a6a9 121 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
mbed_official 85:e1a8e879a6a9 122 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
mbed_official 85:e1a8e879a6a9 123 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
mbed_official 85:e1a8e879a6a9 124 | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
mbed_official 85:e1a8e879a6a9 125 obj->spi->PSELMOSI = mosi;
mbed_official 85:e1a8e879a6a9 126
mbed_official 85:e1a8e879a6a9 127 NRF_GPIO->PIN_CNF[sclk] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
mbed_official 85:e1a8e879a6a9 128 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
mbed_official 85:e1a8e879a6a9 129 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
mbed_official 85:e1a8e879a6a9 130 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
mbed_official 85:e1a8e879a6a9 131 | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
mbed_official 85:e1a8e879a6a9 132 obj->spi->PSELSCK = sclk;
mbed_official 85:e1a8e879a6a9 133
mbed_official 85:e1a8e879a6a9 134 //NRF_GPIO->DIR &= ~(1<<miso);
mbed_official 85:e1a8e879a6a9 135 NRF_GPIO->PIN_CNF[miso] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
mbed_official 85:e1a8e879a6a9 136 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
mbed_official 85:e1a8e879a6a9 137 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
mbed_official 85:e1a8e879a6a9 138 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
mbed_official 85:e1a8e879a6a9 139 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
mbed_official 85:e1a8e879a6a9 140
mbed_official 85:e1a8e879a6a9 141 obj->spi->PSELMISO = miso;
mbed_official 85:e1a8e879a6a9 142
mbed_official 227:7bd0639b8911 143 obj->spi->EVENTS_READY = 0U;
mbed_official 85:e1a8e879a6a9 144
mbed_official 85:e1a8e879a6a9 145 spi_format(obj, 8, 0, 0); // 8 bits, mode 0, master
mbed_official 227:7bd0639b8911 146 spi_frequency(obj, 1000000);
mbed_official 85:e1a8e879a6a9 147 }
mbed_official 85:e1a8e879a6a9 148
mbed_official 85:e1a8e879a6a9 149 }
mbed_official 85:e1a8e879a6a9 150
mbed_official 85:e1a8e879a6a9 151 void spi_free(spi_t *obj) {}
mbed_official 85:e1a8e879a6a9 152
mbed_official 85:e1a8e879a6a9 153 static inline void spi_disable(spi_t *obj, int slave) {
mbed_official 85:e1a8e879a6a9 154 if(slave){
mbed_official 85:e1a8e879a6a9 155 obj->spis->ENABLE = (SPIS_ENABLE_ENABLE_Disabled << SPIS_ENABLE_ENABLE_Pos);
mbed_official 85:e1a8e879a6a9 156 }
mbed_official 85:e1a8e879a6a9 157 else{
mbed_official 85:e1a8e879a6a9 158 obj->spi->ENABLE = (SPI_ENABLE_ENABLE_Disabled << SPI_ENABLE_ENABLE_Pos);
mbed_official 85:e1a8e879a6a9 159 }
mbed_official 85:e1a8e879a6a9 160 }
mbed_official 85:e1a8e879a6a9 161
mbed_official 85:e1a8e879a6a9 162 static inline void spi_enable(spi_t *obj, int slave) {
mbed_official 85:e1a8e879a6a9 163 if(slave){
mbed_official 85:e1a8e879a6a9 164 obj->spis->ENABLE = (SPIS_ENABLE_ENABLE_Enabled << SPIS_ENABLE_ENABLE_Pos);
mbed_official 85:e1a8e879a6a9 165 }
mbed_official 85:e1a8e879a6a9 166 else{
mbed_official 85:e1a8e879a6a9 167 obj->spi->ENABLE = (SPI_ENABLE_ENABLE_Enabled << SPI_ENABLE_ENABLE_Pos);
mbed_official 85:e1a8e879a6a9 168 }
mbed_official 85:e1a8e879a6a9 169 }
mbed_official 85:e1a8e879a6a9 170
mbed_official 85:e1a8e879a6a9 171 void spi_format(spi_t *obj, int bits, int mode, int slave) {
mbed_official 209:137057ef9d1e 172 uint32_t config_mode = 0;
mbed_official 85:e1a8e879a6a9 173 spi_disable(obj,slave);
mbed_official 85:e1a8e879a6a9 174
mbed_official 85:e1a8e879a6a9 175 if (bits != 8) {
mbed_official 85:e1a8e879a6a9 176 error("Only 8bits SPI supported");
mbed_official 85:e1a8e879a6a9 177 }
mbed_official 85:e1a8e879a6a9 178
mbed_official 85:e1a8e879a6a9 179 switch (mode)
mbed_official 85:e1a8e879a6a9 180 {
mbed_official 85:e1a8e879a6a9 181 case 0:
mbed_official 85:e1a8e879a6a9 182 config_mode = (SPI_CONFIG_CPHA_Leading << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveHigh << SPI_CONFIG_CPOL_Pos);
mbed_official 85:e1a8e879a6a9 183 break;
mbed_official 85:e1a8e879a6a9 184 case 1:
mbed_official 85:e1a8e879a6a9 185 config_mode = (SPI_CONFIG_CPHA_Trailing << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveHigh << SPI_CONFIG_CPOL_Pos);
mbed_official 85:e1a8e879a6a9 186 break;
mbed_official 85:e1a8e879a6a9 187 case 2:
mbed_official 85:e1a8e879a6a9 188 config_mode = (SPI_CONFIG_CPHA_Leading << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveLow << SPI_CONFIG_CPOL_Pos);
mbed_official 85:e1a8e879a6a9 189 break;
mbed_official 85:e1a8e879a6a9 190 case 3:
mbed_official 85:e1a8e879a6a9 191 config_mode = (SPI_CONFIG_CPHA_Trailing << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveLow << SPI_CONFIG_CPOL_Pos);
mbed_official 85:e1a8e879a6a9 192 break;
mbed_official 85:e1a8e879a6a9 193 default:
mbed_official 85:e1a8e879a6a9 194 error("SPI format error");
mbed_official 85:e1a8e879a6a9 195 break;
mbed_official 85:e1a8e879a6a9 196 }
mbed_official 85:e1a8e879a6a9 197 //default to msb first
mbed_official 85:e1a8e879a6a9 198 if(slave){
mbed_official 227:7bd0639b8911 199 obj->spis->CONFIG = (config_mode | (SPI_CONFIG_ORDER_MsbFirst << SPI_CONFIG_ORDER_Pos) );
mbed_official 85:e1a8e879a6a9 200 }
mbed_official 85:e1a8e879a6a9 201 else{
mbed_official 227:7bd0639b8911 202 obj->spi->CONFIG = (config_mode | (SPI_CONFIG_ORDER_MsbFirst << SPI_CONFIG_ORDER_Pos) );
mbed_official 85:e1a8e879a6a9 203 }
mbed_official 85:e1a8e879a6a9 204
mbed_official 85:e1a8e879a6a9 205 spi_enable(obj,slave);
mbed_official 85:e1a8e879a6a9 206 }
mbed_official 85:e1a8e879a6a9 207
mbed_official 85:e1a8e879a6a9 208 void spi_frequency(spi_t *obj, int hz) {
mbed_official 85:e1a8e879a6a9 209 if((int)obj->spi==NC)
mbed_official 85:e1a8e879a6a9 210 return;
mbed_official 85:e1a8e879a6a9 211 spi_disable(obj,0);
mbed_official 85:e1a8e879a6a9 212
mbed_official 85:e1a8e879a6a9 213 if(hz<250000) { //125Kbps
mbed_official 227:7bd0639b8911 214 obj->spi->FREQUENCY = (uint32_t) SPI_FREQUENCY_FREQUENCY_K125;
mbed_official 85:e1a8e879a6a9 215 }
mbed_official 85:e1a8e879a6a9 216 else if(hz<500000){//250Kbps
mbed_official 85:e1a8e879a6a9 217 obj->spi->FREQUENCY = (uint32_t) SPI_FREQUENCY_FREQUENCY_K250;
mbed_official 85:e1a8e879a6a9 218 }
mbed_official 85:e1a8e879a6a9 219 else if(hz<1000000){//500Kbps
mbed_official 85:e1a8e879a6a9 220 obj->spi->FREQUENCY = (uint32_t) SPI_FREQUENCY_FREQUENCY_K500;
mbed_official 85:e1a8e879a6a9 221 }
mbed_official 85:e1a8e879a6a9 222 else if(hz<2000000){//1Mbps
mbed_official 85:e1a8e879a6a9 223 obj->spi->FREQUENCY = (uint32_t) SPI_FREQUENCY_FREQUENCY_M1;
mbed_official 85:e1a8e879a6a9 224 }
mbed_official 85:e1a8e879a6a9 225 else if(hz<4000000){//2Mbps
mbed_official 85:e1a8e879a6a9 226 obj->spi->FREQUENCY = (uint32_t) SPI_FREQUENCY_FREQUENCY_M2;
mbed_official 85:e1a8e879a6a9 227 }
mbed_official 85:e1a8e879a6a9 228 else if(hz<8000000){//4Mbps
mbed_official 85:e1a8e879a6a9 229 obj->spi->FREQUENCY = (uint32_t) SPI_FREQUENCY_FREQUENCY_M4;
mbed_official 85:e1a8e879a6a9 230 }
mbed_official 85:e1a8e879a6a9 231 else{//8Mbps
mbed_official 227:7bd0639b8911 232 obj->spi->FREQUENCY = (uint32_t) SPI_FREQUENCY_FREQUENCY_M8;
mbed_official 85:e1a8e879a6a9 233 }
mbed_official 85:e1a8e879a6a9 234
mbed_official 85:e1a8e879a6a9 235 spi_enable(obj,0);
mbed_official 85:e1a8e879a6a9 236 }
mbed_official 85:e1a8e879a6a9 237
mbed_official 85:e1a8e879a6a9 238 static inline int spi_readable(spi_t *obj) {
mbed_official 85:e1a8e879a6a9 239 return (obj->spi->EVENTS_READY == 1);
mbed_official 85:e1a8e879a6a9 240 }
mbed_official 85:e1a8e879a6a9 241
mbed_official 85:e1a8e879a6a9 242 static inline int spi_writeable(spi_t *obj) {
mbed_official 85:e1a8e879a6a9 243 return (obj->spi->EVENTS_READY == 0);
mbed_official 85:e1a8e879a6a9 244 }
mbed_official 85:e1a8e879a6a9 245
mbed_official 85:e1a8e879a6a9 246
mbed_official 85:e1a8e879a6a9 247 static inline int spi_read(spi_t *obj) {
mbed_official 85:e1a8e879a6a9 248 while (!spi_readable(obj)){
mbed_official 85:e1a8e879a6a9 249 }
mbed_official 85:e1a8e879a6a9 250
mbed_official 85:e1a8e879a6a9 251 obj->spi->EVENTS_READY =0;
mbed_official 85:e1a8e879a6a9 252 return (int)obj->spi->RXD;
mbed_official 85:e1a8e879a6a9 253 }
mbed_official 85:e1a8e879a6a9 254
mbed_official 85:e1a8e879a6a9 255 int spi_master_write(spi_t *obj, int value) {
mbed_official 85:e1a8e879a6a9 256 while (!spi_writeable(obj)){
mbed_official 85:e1a8e879a6a9 257 }
mbed_official 85:e1a8e879a6a9 258 obj->spi->TXD = (uint32_t)value;
mbed_official 85:e1a8e879a6a9 259 return spi_read(obj);
mbed_official 85:e1a8e879a6a9 260 }
mbed_official 85:e1a8e879a6a9 261
mbed_official 227:7bd0639b8911 262 //static inline int spis_writeable(spi_t *obj) {
mbed_official 85:e1a8e879a6a9 263 // return (obj->spis->EVENTS_ACQUIRED==1);
mbed_official 85:e1a8e879a6a9 264 //}
mbed_official 85:e1a8e879a6a9 265
mbed_official 85:e1a8e879a6a9 266 int spi_slave_receive(spi_t *obj) {
mbed_official 85:e1a8e879a6a9 267 return obj->spis->EVENTS_END;
mbed_official 85:e1a8e879a6a9 268 };
mbed_official 85:e1a8e879a6a9 269
mbed_official 227:7bd0639b8911 270 int spi_slave_read(spi_t *obj) {
mbed_official 85:e1a8e879a6a9 271 return m_rx_buf[0];
mbed_official 85:e1a8e879a6a9 272 }
mbed_official 85:e1a8e879a6a9 273
mbed_official 227:7bd0639b8911 274 void spi_slave_write(spi_t *obj, int value) {
mbed_official 227:7bd0639b8911 275 m_tx_buf[0]= value & 0xFF;
mbed_official 85:e1a8e879a6a9 276 obj->spis->TASKS_RELEASE=1;
mbed_official 85:e1a8e879a6a9 277 obj->spis->EVENTS_ACQUIRED=0;
mbed_official 85:e1a8e879a6a9 278 obj->spis->EVENTS_END=0;
mbed_official 85:e1a8e879a6a9 279 }