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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/spi_api.c@285:31249416b6f9, 2014-08-15 (annotated)

Committer:
mbed_official
Date:
Fri Aug 15 16:30:08 2014 +0100
Revision:
285:31249416b6f9
Parent:
270:e2babe29baf8
Child:
300:55638feb26a4
Synchronized with git revision 601712595f49bbd2a2771c52cf3e84c9c7a591af



Full URL: https://github.com/mbedmicro/mbed/commit/601712595f49bbd2a2771c52cf3e84c9c7a591af/

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 285:31249416b6f9 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 257:9258cc0a200d 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 }