Tsungta Wu / Mbed OS mbed_SPIS_multiByte_example

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spi_api_multibyte.c@1:58f0712d9aa2, 2017-05-31 (annotated)

Committer:
tsungta
Date:
Wed May 31 07:39:37 2017 +0000
Revision:
1:58f0712d9aa2
Parent:
0:b7415ae44dac
Child:
2:c520d7c7739d
Able to receive multiple bytes in single CS cycle;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tsungta 0:b7415ae44dac 1 /*
tsungta 0:b7415ae44dac 2 * Copyright (c) 2013 Nordic Semiconductor ASA
tsungta 0:b7415ae44dac 3 * All rights reserved.
tsungta 0:b7415ae44dac 4 *
tsungta 0:b7415ae44dac 5 * Redistribution and use in source and binary forms, with or without modification,
tsungta 0:b7415ae44dac 6 * are permitted provided that the following conditions are met:
tsungta 0:b7415ae44dac 7 *
tsungta 0:b7415ae44dac 8 * 1. Redistributions of source code must retain the above copyright notice, this list
tsungta 0:b7415ae44dac 9 * of conditions and the following disclaimer.
tsungta 0:b7415ae44dac 10 *
tsungta 0:b7415ae44dac 11 * 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA
tsungta 0:b7415ae44dac 12 * integrated circuit in a product or a software update for such product, must reproduce
tsungta 0:b7415ae44dac 13 * the above copyright notice, this list of conditions and the following disclaimer in
tsungta 0:b7415ae44dac 14 * the documentation and/or other materials provided with the distribution.
tsungta 0:b7415ae44dac 15 *
tsungta 0:b7415ae44dac 16 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be
tsungta 0:b7415ae44dac 17 * used to endorse or promote products derived from this software without specific prior
tsungta 0:b7415ae44dac 18 * written permission.
tsungta 0:b7415ae44dac 19 *
tsungta 0:b7415ae44dac 20 * 4. This software, with or without modification, must only be used with a
tsungta 0:b7415ae44dac 21 * Nordic Semiconductor ASA integrated circuit.
tsungta 0:b7415ae44dac 22 *
tsungta 0:b7415ae44dac 23 * 5. Any software provided in binary or object form under this license must not be reverse
tsungta 0:b7415ae44dac 24 * engineered, decompiled, modified and/or disassembled.
tsungta 0:b7415ae44dac 25 *
tsungta 0:b7415ae44dac 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
tsungta 0:b7415ae44dac 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
tsungta 0:b7415ae44dac 28 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
tsungta 0:b7415ae44dac 29 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
tsungta 0:b7415ae44dac 30 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
tsungta 0:b7415ae44dac 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
tsungta 0:b7415ae44dac 32 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
tsungta 0:b7415ae44dac 33 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
tsungta 0:b7415ae44dac 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
tsungta 0:b7415ae44dac 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
tsungta 0:b7415ae44dac 36 *
tsungta 0:b7415ae44dac 37 */
tsungta 0:b7415ae44dac 38
tsungta 0:b7415ae44dac 39
tsungta 0:b7415ae44dac 40 #include "spi_api_multibyte.h"
tsungta 0:b7415ae44dac 41
tsungta 0:b7415ae44dac 42 #if DEVICE_SPI
tsungta 0:b7415ae44dac 43
tsungta 0:b7415ae44dac 44 #include "cmsis.h"
tsungta 0:b7415ae44dac 45 #include "pinmap.h"
tsungta 0:b7415ae44dac 46 #include "mbed_assert.h"
tsungta 0:b7415ae44dac 47 #include "mbed_error.h"
tsungta 0:b7415ae44dac 48 #include "nrf_drv_spi.h"
tsungta 0:b7415ae44dac 49 #include "nrf_drv_spis.h"
tsungta 0:b7415ae44dac 50 #include "app_util_platform.h"
tsungta 0:b7415ae44dac 51
tsungta 0:b7415ae44dac 52 #if DEVICE_SPI_ASYNCH
tsungta 0:b7415ae44dac 53 #define SPI_IDX(obj) ((obj)->spi.spi_idx)
tsungta 0:b7415ae44dac 54 #else
tsungta 0:b7415ae44dac 55 #define SPI_IDX(obj) ((obj)->spi_idx)
tsungta 0:b7415ae44dac 56 #endif
tsungta 0:b7415ae44dac 57 #define SPI_INFO(obj) (&m_spi_info[SPI_IDX(obj)])
tsungta 0:b7415ae44dac 58 #define MASTER_INST(obj) (&m_instances[SPI_IDX(obj)].master)
tsungta 0:b7415ae44dac 59 #define SLAVE_INST(obj) (&m_instances[SPI_IDX(obj)].slave)
tsungta 0:b7415ae44dac 60
tsungta 0:b7415ae44dac 61 typedef struct {
tsungta 0:b7415ae44dac 62 bool initialized;
tsungta 0:b7415ae44dac 63 bool master;
tsungta 0:b7415ae44dac 64 uint8_t sck_pin;
tsungta 0:b7415ae44dac 65 uint8_t mosi_pin;
tsungta 0:b7415ae44dac 66 uint8_t miso_pin;
tsungta 0:b7415ae44dac 67 uint8_t ss_pin;
tsungta 0:b7415ae44dac 68 uint8_t spi_mode;
tsungta 0:b7415ae44dac 69 nrf_drv_spi_frequency_t frequency;
tsungta 0:b7415ae44dac 70 volatile union {
tsungta 0:b7415ae44dac 71 bool busy; // master
tsungta 0:b7415ae44dac 72 bool readable; // slave
tsungta 0:b7415ae44dac 73 } flag;
tsungta 0:b7415ae44dac 74 //volatile uint8_t tx_buf;
tsungta 0:b7415ae44dac 75 //volatile uint8_t rx_buf;
tsungta 0:b7415ae44dac 76
tsungta 0:b7415ae44dac 77 #if DEVICE_SPI_ASYNCH
tsungta 0:b7415ae44dac 78 uint32_t handler;
tsungta 0:b7415ae44dac 79 uint32_t event;
tsungta 0:b7415ae44dac 80 #endif
tsungta 0:b7415ae44dac 81 } spi_info_t;
tsungta 0:b7415ae44dac 82
tsungta 1:58f0712d9aa2 83 // #define TEST_STRING "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" //Tsungta, handle 32 bytes per SPI CS cycle
tsungta 1:58f0712d9aa2 84 #define TEST_STRING "012" //Tsungta, handle 32 bytes per SPI CS cycle
tsungta 0:b7415ae44dac 85 uint8_t m_tx_buf[] = TEST_STRING; /**< TX buffer. */
tsungta 0:b7415ae44dac 86 uint8_t m_rx_buf[sizeof(TEST_STRING)+1]; /**< RX buffer. */
tsungta 0:b7415ae44dac 87 const uint8_t m_length = sizeof(m_tx_buf); /**< Transfer length. */
tsungta 0:b7415ae44dac 88
tsungta 0:b7415ae44dac 89 static spi_info_t m_spi_info[SPI_COUNT];
tsungta 0:b7415ae44dac 90
tsungta 0:b7415ae44dac 91 typedef struct {
tsungta 0:b7415ae44dac 92 nrf_drv_spi_t master;
tsungta 0:b7415ae44dac 93 nrf_drv_spis_t slave;
tsungta 0:b7415ae44dac 94 } sdk_driver_instances_t;
tsungta 0:b7415ae44dac 95
tsungta 0:b7415ae44dac 96 void SPI0_TWI0_IRQHandler(void);
tsungta 0:b7415ae44dac 97 void SPI1_TWI1_IRQHandler(void);
tsungta 0:b7415ae44dac 98 void SPIM2_SPIS2_SPI2_IRQHandler(void);
tsungta 0:b7415ae44dac 99
tsungta 0:b7415ae44dac 100 static const peripheral_handler_desc_t spi_hanlder_desc[SPI_COUNT] = {
tsungta 0:b7415ae44dac 101 #if SPI0_ENABLED
tsungta 0:b7415ae44dac 102 {
tsungta 0:b7415ae44dac 103 SPIS0_IRQ,
tsungta 0:b7415ae44dac 104 (uint32_t) SPI0_TWI0_IRQHandler
tsungta 0:b7415ae44dac 105 },
tsungta 0:b7415ae44dac 106 #endif
tsungta 0:b7415ae44dac 107 #if SPI1_ENABLED
tsungta 0:b7415ae44dac 108 {
tsungta 0:b7415ae44dac 109 SPIS1_IRQ,
tsungta 0:b7415ae44dac 110 (uint32_t) SPI1_TWI1_IRQHandler
tsungta 0:b7415ae44dac 111 },
tsungta 0:b7415ae44dac 112 #endif
tsungta 0:b7415ae44dac 113 #if SPI2_ENABLED
tsungta 0:b7415ae44dac 114 {
tsungta 0:b7415ae44dac 115 SPIS2_IRQ,
tsungta 0:b7415ae44dac 116 (uint32_t) SPIM2_SPIS2_SPI2_IRQHandler
tsungta 0:b7415ae44dac 117 },
tsungta 0:b7415ae44dac 118 #endif
tsungta 0:b7415ae44dac 119 };
tsungta 0:b7415ae44dac 120
tsungta 0:b7415ae44dac 121
tsungta 0:b7415ae44dac 122 static sdk_driver_instances_t m_instances[SPI_COUNT] = {
tsungta 0:b7415ae44dac 123 #if SPI0_ENABLED
tsungta 0:b7415ae44dac 124 {
tsungta 0:b7415ae44dac 125 NRF_DRV_SPI_INSTANCE(0),
tsungta 0:b7415ae44dac 126 NRF_DRV_SPIS_INSTANCE(0)
tsungta 0:b7415ae44dac 127 },
tsungta 0:b7415ae44dac 128 #endif
tsungta 0:b7415ae44dac 129 #if SPI1_ENABLED
tsungta 0:b7415ae44dac 130 {
tsungta 0:b7415ae44dac 131 NRF_DRV_SPI_INSTANCE(1),
tsungta 0:b7415ae44dac 132 NRF_DRV_SPIS_INSTANCE(1)
tsungta 0:b7415ae44dac 133 },
tsungta 0:b7415ae44dac 134 #endif
tsungta 0:b7415ae44dac 135 #if SPI2_ENABLED
tsungta 0:b7415ae44dac 136 {
tsungta 0:b7415ae44dac 137 NRF_DRV_SPI_INSTANCE(2),
tsungta 0:b7415ae44dac 138 NRF_DRV_SPIS_INSTANCE(2)
tsungta 0:b7415ae44dac 139 },
tsungta 0:b7415ae44dac 140 #endif
tsungta 0:b7415ae44dac 141 };
tsungta 0:b7415ae44dac 142
tsungta 0:b7415ae44dac 143 static void master_event_handler(uint8_t spi_idx,
tsungta 0:b7415ae44dac 144 nrf_drv_spi_evt_t const *p_event)
tsungta 0:b7415ae44dac 145 {
tsungta 0:b7415ae44dac 146 spi_info_t *p_spi_info = &m_spi_info[spi_idx];
tsungta 0:b7415ae44dac 147
tsungta 0:b7415ae44dac 148 if (p_event->type == NRF_DRV_SPI_EVENT_DONE) {
tsungta 0:b7415ae44dac 149 p_spi_info->flag.busy = false;
tsungta 0:b7415ae44dac 150 if (p_spi_info->handler) {
tsungta 0:b7415ae44dac 151 void (*handler)(void) = (void (*)(void))p_spi_info->handler;
tsungta 0:b7415ae44dac 152 p_spi_info->handler = 0;
tsungta 0:b7415ae44dac 153 handler();
tsungta 0:b7415ae44dac 154 }
tsungta 0:b7415ae44dac 155 }
tsungta 0:b7415ae44dac 156 }
tsungta 0:b7415ae44dac 157 #define MASTER_EVENT_HANDLER(idx) \
tsungta 0:b7415ae44dac 158 static void master_event_handler_##idx(nrf_drv_spi_evt_t const *p_event) { \
tsungta 0:b7415ae44dac 159 master_event_handler(SPI##idx##_INSTANCE_INDEX, p_event); \
tsungta 0:b7415ae44dac 160 }
tsungta 0:b7415ae44dac 161 #if SPI0_ENABLED
tsungta 0:b7415ae44dac 162 MASTER_EVENT_HANDLER(0)
tsungta 0:b7415ae44dac 163 #endif
tsungta 0:b7415ae44dac 164 #if SPI1_ENABLED
tsungta 0:b7415ae44dac 165 MASTER_EVENT_HANDLER(1)
tsungta 0:b7415ae44dac 166 #endif
tsungta 0:b7415ae44dac 167 #if SPI2_ENABLED
tsungta 0:b7415ae44dac 168 MASTER_EVENT_HANDLER(2)
tsungta 0:b7415ae44dac 169 #endif
tsungta 0:b7415ae44dac 170
tsungta 0:b7415ae44dac 171 static nrf_drv_spi_handler_t const m_master_event_handlers[SPI_COUNT] = {
tsungta 0:b7415ae44dac 172 #if SPI0_ENABLED
tsungta 0:b7415ae44dac 173 master_event_handler_0,
tsungta 0:b7415ae44dac 174 #endif
tsungta 0:b7415ae44dac 175 #if SPI1_ENABLED
tsungta 0:b7415ae44dac 176 master_event_handler_1,
tsungta 0:b7415ae44dac 177 #endif
tsungta 0:b7415ae44dac 178 #if SPI2_ENABLED
tsungta 0:b7415ae44dac 179 master_event_handler_2,
tsungta 0:b7415ae44dac 180 #endif
tsungta 0:b7415ae44dac 181 };
tsungta 0:b7415ae44dac 182
tsungta 0:b7415ae44dac 183
tsungta 0:b7415ae44dac 184 static void slave_event_handler(uint8_t spi_idx,
tsungta 0:b7415ae44dac 185 nrf_drv_spis_event_t event)
tsungta 0:b7415ae44dac 186 {
tsungta 0:b7415ae44dac 187 spi_info_t *p_spi_info = &m_spi_info[spi_idx];
tsungta 0:b7415ae44dac 188
tsungta 0:b7415ae44dac 189 if (event.evt_type == NRF_DRV_SPIS_XFER_DONE) {
tsungta 0:b7415ae44dac 190 // Signal that there is some data received that could be read.
tsungta 1:58f0712d9aa2 191 if(event.rx_amount == 3)//Tsungta
tsungta 1:58f0712d9aa2 192 p_spi_info->flag.readable = true;
tsungta 0:b7415ae44dac 193
tsungta 0:b7415ae44dac 194 // And prepare for the next transfer.
tsungta 0:b7415ae44dac 195 // Previous data set in 'spi_slave_write' (if any) has been transmitted,
tsungta 0:b7415ae44dac 196 // now use the default one, until some new is set by 'spi_slave_write'.
tsungta 0:b7415ae44dac 197 //m_tx_buf = NRF_DRV_SPIS_DEFAULT_ORC;
tsungta 0:b7415ae44dac 198 nrf_drv_spis_buffers_set(&m_instances[spi_idx].slave,
tsungta 0:b7415ae44dac 199 m_tx_buf, m_length, m_rx_buf, m_length);
tsungta 0:b7415ae44dac 200 }
tsungta 0:b7415ae44dac 201 }
tsungta 0:b7415ae44dac 202 #define SLAVE_EVENT_HANDLER(idx) \
tsungta 0:b7415ae44dac 203 static void slave_event_handler_##idx(nrf_drv_spis_event_t event) { \
tsungta 0:b7415ae44dac 204 slave_event_handler(SPIS##idx##_INSTANCE_INDEX, event); \
tsungta 0:b7415ae44dac 205 }
tsungta 0:b7415ae44dac 206 #if SPIS0_ENABLED
tsungta 0:b7415ae44dac 207 SLAVE_EVENT_HANDLER(0)
tsungta 0:b7415ae44dac 208 #endif
tsungta 0:b7415ae44dac 209 #if SPIS1_ENABLED
tsungta 0:b7415ae44dac 210 SLAVE_EVENT_HANDLER(1)
tsungta 0:b7415ae44dac 211 #endif
tsungta 0:b7415ae44dac 212 #if SPIS2_ENABLED
tsungta 0:b7415ae44dac 213 SLAVE_EVENT_HANDLER(2)
tsungta 0:b7415ae44dac 214 #endif
tsungta 0:b7415ae44dac 215
tsungta 0:b7415ae44dac 216 static nrf_drv_spis_event_handler_t const m_slave_event_handlers[SPIS_COUNT] = {
tsungta 0:b7415ae44dac 217 #if SPIS0_ENABLED
tsungta 0:b7415ae44dac 218 slave_event_handler_0,
tsungta 0:b7415ae44dac 219 #endif
tsungta 0:b7415ae44dac 220 #if SPIS1_ENABLED
tsungta 0:b7415ae44dac 221 slave_event_handler_1,
tsungta 0:b7415ae44dac 222 #endif
tsungta 0:b7415ae44dac 223 #if SPIS2_ENABLED
tsungta 0:b7415ae44dac 224 slave_event_handler_2,
tsungta 0:b7415ae44dac 225 #endif
tsungta 0:b7415ae44dac 226 };
tsungta 0:b7415ae44dac 227
tsungta 0:b7415ae44dac 228 static void prepare_master_config(nrf_drv_spi_config_t *p_config,
tsungta 0:b7415ae44dac 229 spi_info_t const *p_spi_info)
tsungta 0:b7415ae44dac 230 {
tsungta 0:b7415ae44dac 231 p_config->sck_pin = p_spi_info->sck_pin;
tsungta 0:b7415ae44dac 232 p_config->mosi_pin = p_spi_info->mosi_pin;
tsungta 0:b7415ae44dac 233 p_config->miso_pin = p_spi_info->miso_pin;
tsungta 0:b7415ae44dac 234 p_config->ss_pin = p_spi_info->ss_pin;
tsungta 0:b7415ae44dac 235 p_config->frequency = p_spi_info->frequency;
tsungta 0:b7415ae44dac 236 p_config->mode = (nrf_drv_spi_mode_t)p_spi_info->spi_mode;
tsungta 0:b7415ae44dac 237
tsungta 0:b7415ae44dac 238 p_config->irq_priority = SPI1_CONFIG_IRQ_PRIORITY;
tsungta 0:b7415ae44dac 239 p_config->orc = 0xFF;
tsungta 0:b7415ae44dac 240 p_config->bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST;
tsungta 0:b7415ae44dac 241 }
tsungta 0:b7415ae44dac 242
tsungta 0:b7415ae44dac 243 static void prepare_slave_config(nrf_drv_spis_config_t *p_config,
tsungta 0:b7415ae44dac 244 spi_info_t const *p_spi_info)
tsungta 0:b7415ae44dac 245 {
tsungta 0:b7415ae44dac 246 p_config->sck_pin = p_spi_info->sck_pin;
tsungta 0:b7415ae44dac 247 p_config->mosi_pin = p_spi_info->mosi_pin;
tsungta 0:b7415ae44dac 248 p_config->miso_pin = p_spi_info->miso_pin;
tsungta 0:b7415ae44dac 249 p_config->csn_pin = p_spi_info->ss_pin;
tsungta 0:b7415ae44dac 250 p_config->mode = (nrf_drv_spis_mode_t)p_spi_info->spi_mode;
tsungta 0:b7415ae44dac 251
tsungta 0:b7415ae44dac 252 p_config->irq_priority = SPIS1_CONFIG_IRQ_PRIORITY;
tsungta 0:b7415ae44dac 253 p_config->orc = NRF_DRV_SPIS_DEFAULT_ORC;
tsungta 0:b7415ae44dac 254 p_config->def = NRF_DRV_SPIS_DEFAULT_DEF;
tsungta 0:b7415ae44dac 255 p_config->bit_order = NRF_DRV_SPIS_BIT_ORDER_MSB_FIRST;
tsungta 0:b7415ae44dac 256 p_config->csn_pullup = NRF_DRV_SPIS_DEFAULT_CSN_PULLUP;
tsungta 0:b7415ae44dac 257 p_config->miso_drive = NRF_DRV_SPIS_DEFAULT_MISO_DRIVE;
tsungta 0:b7415ae44dac 258 }
tsungta 0:b7415ae44dac 259
tsungta 0:b7415ae44dac 260 void spi_init_multibyte(spi_mb_t *obj,
tsungta 0:b7415ae44dac 261 PinName mosi, PinName miso, PinName sclk, PinName ssel)
tsungta 0:b7415ae44dac 262 {
tsungta 0:b7415ae44dac 263 int i;
tsungta 0:b7415ae44dac 264 for (i = 0; i < SPI_COUNT; ++i) {
tsungta 0:b7415ae44dac 265 spi_info_t *p_spi_info = &m_spi_info[i];
tsungta 0:b7415ae44dac 266 if (!p_spi_info->initialized) {
tsungta 0:b7415ae44dac 267
tsungta 0:b7415ae44dac 268 NVIC_SetVector(spi_hanlder_desc[i].IRQn, spi_hanlder_desc[i].vector);
tsungta 0:b7415ae44dac 269
tsungta 0:b7415ae44dac 270 p_spi_info->sck_pin = (uint8_t)sclk;
tsungta 0:b7415ae44dac 271 p_spi_info->mosi_pin = (mosi != NC) ?
tsungta 0:b7415ae44dac 272 (uint8_t)mosi : NRF_DRV_SPI_PIN_NOT_USED;
tsungta 0:b7415ae44dac 273 p_spi_info->miso_pin = (miso != NC) ?
tsungta 0:b7415ae44dac 274 (uint8_t)miso : NRF_DRV_SPI_PIN_NOT_USED;
tsungta 0:b7415ae44dac 275 p_spi_info->ss_pin = (ssel != NC) ?
tsungta 0:b7415ae44dac 276 (uint8_t)ssel : NRF_DRV_SPI_PIN_NOT_USED;
tsungta 0:b7415ae44dac 277 p_spi_info->spi_mode = (uint8_t)NRF_DRV_SPI_MODE_0;
tsungta 0:b7415ae44dac 278 p_spi_info->frequency = NRF_DRV_SPI_FREQ_1M;
tsungta 0:b7415ae44dac 279
tsungta 0:b7415ae44dac 280 // By default each SPI instance is initialized to work as a master.
tsungta 0:b7415ae44dac 281 // Should the slave mode be used, the instance will be reconfigured
tsungta 0:b7415ae44dac 282 // appropriately in 'spi_format'.
tsungta 0:b7415ae44dac 283 nrf_drv_spi_config_t config;
tsungta 0:b7415ae44dac 284 prepare_master_config(&config, p_spi_info);
tsungta 0:b7415ae44dac 285
tsungta 0:b7415ae44dac 286 nrf_drv_spi_t const *p_spi = &m_instances[i].master;
tsungta 0:b7415ae44dac 287 ret_code_t ret_code = nrf_drv_spi_init(p_spi,
tsungta 0:b7415ae44dac 288 &config, m_master_event_handlers[i]);
tsungta 0:b7415ae44dac 289 if (ret_code == NRF_SUCCESS) {
tsungta 0:b7415ae44dac 290 p_spi_info->initialized = true;
tsungta 0:b7415ae44dac 291 p_spi_info->master = true;
tsungta 0:b7415ae44dac 292 p_spi_info->flag.busy = false;
tsungta 0:b7415ae44dac 293 #if DEVICE_SPI_ASYNCH
tsungta 0:b7415ae44dac 294 p_spi_info->handler = 0;
tsungta 0:b7415ae44dac 295 #endif
tsungta 0:b7415ae44dac 296 SPI_IDX(obj) = i;
tsungta 0:b7415ae44dac 297
tsungta 0:b7415ae44dac 298 return;
tsungta 0:b7415ae44dac 299 }
tsungta 0:b7415ae44dac 300 }
tsungta 0:b7415ae44dac 301 }
tsungta 0:b7415ae44dac 302
tsungta 0:b7415ae44dac 303 // No available peripheral
tsungta 0:b7415ae44dac 304 error("No available SPI peripheral\r\n");
tsungta 0:b7415ae44dac 305 }
tsungta 0:b7415ae44dac 306
tsungta 0:b7415ae44dac 307 void spi_free_multibyte(spi_mb_t *obj)
tsungta 0:b7415ae44dac 308 {
tsungta 0:b7415ae44dac 309 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 310 if (p_spi_info->master) {
tsungta 0:b7415ae44dac 311 nrf_drv_spi_uninit(MASTER_INST(obj));
tsungta 0:b7415ae44dac 312 }
tsungta 0:b7415ae44dac 313 else {
tsungta 0:b7415ae44dac 314 nrf_drv_spis_uninit(SLAVE_INST(obj));
tsungta 0:b7415ae44dac 315 }
tsungta 0:b7415ae44dac 316 p_spi_info->initialized = false;
tsungta 0:b7415ae44dac 317 }
tsungta 0:b7415ae44dac 318
tsungta 0:b7415ae44dac 319 int spi_busy_multibyte(spi_mb_t *obj)
tsungta 0:b7415ae44dac 320 {
tsungta 0:b7415ae44dac 321 return (int)(SPI_INFO(obj)->flag.busy);
tsungta 0:b7415ae44dac 322 }
tsungta 0:b7415ae44dac 323
tsungta 0:b7415ae44dac 324 void spi_format_multibyte(spi_mb_t *obj, int bits, int mode, int slave)
tsungta 0:b7415ae44dac 325 {
tsungta 0:b7415ae44dac 326 if (bits != 8) {
tsungta 0:b7415ae44dac 327 error("Only 8-bits SPI is supported\r\n");
tsungta 0:b7415ae44dac 328 }
tsungta 0:b7415ae44dac 329 if (mode > 3) {
tsungta 0:b7415ae44dac 330 error("SPI format error\r\n");
tsungta 0:b7415ae44dac 331 }
tsungta 0:b7415ae44dac 332
tsungta 0:b7415ae44dac 333 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 334
tsungta 0:b7415ae44dac 335 if (slave)
tsungta 0:b7415ae44dac 336 {
tsungta 0:b7415ae44dac 337 nrf_drv_spis_mode_t spi_modes[4] = {
tsungta 0:b7415ae44dac 338 NRF_DRV_SPIS_MODE_0,
tsungta 0:b7415ae44dac 339 NRF_DRV_SPIS_MODE_1,
tsungta 0:b7415ae44dac 340 NRF_DRV_SPIS_MODE_2,
tsungta 0:b7415ae44dac 341 NRF_DRV_SPIS_MODE_3,
tsungta 0:b7415ae44dac 342 };
tsungta 0:b7415ae44dac 343 nrf_drv_spis_mode_t new_mode = spi_modes[mode];
tsungta 0:b7415ae44dac 344
tsungta 0:b7415ae44dac 345 // If the peripheral is currently working as a master, the SDK driver
tsungta 0:b7415ae44dac 346 // it uses needs to be switched from SPI to SPIS.
tsungta 0:b7415ae44dac 347 if (p_spi_info->master) {
tsungta 0:b7415ae44dac 348 nrf_drv_spi_uninit(MASTER_INST(obj));
tsungta 0:b7415ae44dac 349 }
tsungta 0:b7415ae44dac 350 // I the SPI mode has to be changed, the SDK's SPIS driver needs to be
tsungta 0:b7415ae44dac 351 // re-initialized (there is no other way to change its configuration).
tsungta 0:b7415ae44dac 352 else if (p_spi_info->spi_mode != (uint8_t)new_mode) {
tsungta 0:b7415ae44dac 353 nrf_drv_spis_uninit(SLAVE_INST(obj));
tsungta 0:b7415ae44dac 354 }
tsungta 0:b7415ae44dac 355 else {
tsungta 0:b7415ae44dac 356 return;
tsungta 0:b7415ae44dac 357 }
tsungta 0:b7415ae44dac 358
tsungta 0:b7415ae44dac 359 p_spi_info->spi_mode = (uint8_t)new_mode;
tsungta 0:b7415ae44dac 360 p_spi_info->master = false;
tsungta 0:b7415ae44dac 361 p_spi_info->flag.readable = false;
tsungta 0:b7415ae44dac 362
tsungta 0:b7415ae44dac 363 // Initialize SDK's SPIS driver with the new configuration.
tsungta 0:b7415ae44dac 364 nrf_drv_spis_config_t config;
tsungta 0:b7415ae44dac 365 prepare_slave_config(&config, p_spi_info);
tsungta 0:b7415ae44dac 366 (void)nrf_drv_spis_init(SLAVE_INST(obj), &config,
tsungta 0:b7415ae44dac 367 m_slave_event_handlers[SPI_IDX(obj)]);
tsungta 0:b7415ae44dac 368
tsungta 0:b7415ae44dac 369 // Prepare the slave for transfer.
tsungta 0:b7415ae44dac 370 //m_tx_buf = NRF_DRV_SPIS_DEFAULT_ORC;
tsungta 0:b7415ae44dac 371 nrf_drv_spis_buffers_set(SLAVE_INST(obj),
tsungta 0:b7415ae44dac 372 m_tx_buf, m_length, m_rx_buf, m_length);
tsungta 0:b7415ae44dac 373 }
tsungta 0:b7415ae44dac 374 else // master
tsungta 0:b7415ae44dac 375 {
tsungta 0:b7415ae44dac 376 nrf_drv_spi_mode_t spi_modes[4] = {
tsungta 0:b7415ae44dac 377 NRF_DRV_SPI_MODE_0,
tsungta 0:b7415ae44dac 378 NRF_DRV_SPI_MODE_1,
tsungta 0:b7415ae44dac 379 NRF_DRV_SPI_MODE_2,
tsungta 0:b7415ae44dac 380 NRF_DRV_SPI_MODE_3,
tsungta 0:b7415ae44dac 381 };
tsungta 0:b7415ae44dac 382 nrf_drv_spi_mode_t new_mode = spi_modes[mode];
tsungta 0:b7415ae44dac 383
tsungta 0:b7415ae44dac 384 // If the peripheral is currently working as a slave, the SDK driver
tsungta 0:b7415ae44dac 385 // it uses needs to be switched from SPIS to SPI.
tsungta 0:b7415ae44dac 386 if (!p_spi_info->master) {
tsungta 0:b7415ae44dac 387 nrf_drv_spis_uninit(SLAVE_INST(obj));
tsungta 0:b7415ae44dac 388 }
tsungta 0:b7415ae44dac 389 // I the SPI mode has to be changed, the SDK's SPI driver needs to be
tsungta 0:b7415ae44dac 390 // re-initialized (there is no other way to change its configuration).
tsungta 0:b7415ae44dac 391 else if (p_spi_info->spi_mode != (uint8_t)new_mode) {
tsungta 0:b7415ae44dac 392 nrf_drv_spi_uninit(MASTER_INST(obj));
tsungta 0:b7415ae44dac 393 }
tsungta 0:b7415ae44dac 394 else {
tsungta 0:b7415ae44dac 395 return;
tsungta 0:b7415ae44dac 396 }
tsungta 0:b7415ae44dac 397
tsungta 0:b7415ae44dac 398 p_spi_info->spi_mode = (uint8_t)new_mode;
tsungta 0:b7415ae44dac 399 p_spi_info->master = true;
tsungta 0:b7415ae44dac 400 p_spi_info->flag.busy = false;
tsungta 0:b7415ae44dac 401
tsungta 0:b7415ae44dac 402 // Initialize SDK's SPI driver with the new configuration.
tsungta 0:b7415ae44dac 403 nrf_drv_spi_config_t config;
tsungta 0:b7415ae44dac 404 prepare_master_config(&config, p_spi_info);
tsungta 0:b7415ae44dac 405 (void)nrf_drv_spi_init(MASTER_INST(obj), &config,
tsungta 0:b7415ae44dac 406 m_master_event_handlers[SPI_IDX(obj)]);
tsungta 0:b7415ae44dac 407 }
tsungta 0:b7415ae44dac 408 }
tsungta 0:b7415ae44dac 409
tsungta 0:b7415ae44dac 410 static nrf_drv_spi_frequency_t freq_translate(int hz)
tsungta 0:b7415ae44dac 411 {
tsungta 0:b7415ae44dac 412 nrf_drv_spi_frequency_t frequency;
tsungta 0:b7415ae44dac 413 if (hz<250000) { //125Kbps
tsungta 0:b7415ae44dac 414 frequency = NRF_DRV_SPI_FREQ_125K;
tsungta 0:b7415ae44dac 415 } else if (hz<500000) { //250Kbps
tsungta 0:b7415ae44dac 416 frequency = NRF_DRV_SPI_FREQ_250K;
tsungta 0:b7415ae44dac 417 } else if (hz<1000000) { //500Kbps
tsungta 0:b7415ae44dac 418 frequency = NRF_DRV_SPI_FREQ_500K;
tsungta 0:b7415ae44dac 419 } else if (hz<2000000) { //1Mbps
tsungta 0:b7415ae44dac 420 frequency = NRF_DRV_SPI_FREQ_1M;
tsungta 0:b7415ae44dac 421 } else if (hz<4000000) { //2Mbps
tsungta 0:b7415ae44dac 422 frequency = NRF_DRV_SPI_FREQ_2M;
tsungta 0:b7415ae44dac 423 } else if (hz<8000000) { //4Mbps
tsungta 0:b7415ae44dac 424 frequency = NRF_DRV_SPI_FREQ_4M;
tsungta 0:b7415ae44dac 425 } else { //8Mbps
tsungta 0:b7415ae44dac 426 frequency = NRF_DRV_SPI_FREQ_8M;
tsungta 0:b7415ae44dac 427 }
tsungta 0:b7415ae44dac 428 return frequency;
tsungta 0:b7415ae44dac 429 }
tsungta 0:b7415ae44dac 430
tsungta 0:b7415ae44dac 431 void spi_frequency_multibyte(spi_mb_t *obj, int hz)
tsungta 0:b7415ae44dac 432 {
tsungta 0:b7415ae44dac 433 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 434 nrf_drv_spi_frequency_t new_frequency = freq_translate(hz);
tsungta 0:b7415ae44dac 435
tsungta 0:b7415ae44dac 436 if (p_spi_info->master)
tsungta 0:b7415ae44dac 437 {
tsungta 0:b7415ae44dac 438 if (p_spi_info->frequency != new_frequency) {
tsungta 0:b7415ae44dac 439 p_spi_info->frequency = new_frequency;
tsungta 0:b7415ae44dac 440
tsungta 0:b7415ae44dac 441 nrf_drv_spi_config_t config;
tsungta 0:b7415ae44dac 442 prepare_master_config(&config, p_spi_info);
tsungta 0:b7415ae44dac 443
tsungta 0:b7415ae44dac 444 nrf_drv_spi_t const *p_spi = MASTER_INST(obj);
tsungta 0:b7415ae44dac 445 nrf_drv_spi_uninit(p_spi);
tsungta 0:b7415ae44dac 446 (void)nrf_drv_spi_init(p_spi, &config,
tsungta 0:b7415ae44dac 447 m_master_event_handlers[SPI_IDX(obj)]);
tsungta 0:b7415ae44dac 448 }
tsungta 0:b7415ae44dac 449 }
tsungta 0:b7415ae44dac 450 // There is no need to set anything in slaves when it comes to frequency,
tsungta 0:b7415ae44dac 451 // since slaves just synchronize with the clock provided by a master.
tsungta 0:b7415ae44dac 452 }
tsungta 0:b7415ae44dac 453
tsungta 0:b7415ae44dac 454 int spi_master_write_multibyte(spi_mb_t *obj, int value)
tsungta 0:b7415ae44dac 455 {
tsungta 0:b7415ae44dac 456 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 457
tsungta 0:b7415ae44dac 458 #if DEVICE_SPI_ASYNCH
tsungta 0:b7415ae44dac 459 while (p_spi_info->flag.busy) {
tsungta 0:b7415ae44dac 460 }
tsungta 0:b7415ae44dac 461 #endif
tsungta 0:b7415ae44dac 462
tsungta 0:b7415ae44dac 463 //m_tx_buf = value;
tsungta 0:b7415ae44dac 464 p_spi_info->flag.busy = true;
tsungta 0:b7415ae44dac 465 (void)nrf_drv_spi_transfer(MASTER_INST(obj),
tsungta 0:b7415ae44dac 466 m_tx_buf, m_length, m_rx_buf, m_length);
tsungta 0:b7415ae44dac 467 while (p_spi_info->flag.busy) {
tsungta 0:b7415ae44dac 468 }
tsungta 0:b7415ae44dac 469
tsungta 0:b7415ae44dac 470 return m_rx_buf;
tsungta 0:b7415ae44dac 471 }
tsungta 0:b7415ae44dac 472
tsungta 0:b7415ae44dac 473 int spi_slave_receive_multibyte(spi_mb_t *obj)
tsungta 0:b7415ae44dac 474 {
tsungta 0:b7415ae44dac 475 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 476 MBED_ASSERT(!p_spi_info->master);
tsungta 0:b7415ae44dac 477 return p_spi_info->flag.readable;
tsungta 0:b7415ae44dac 478 ;
tsungta 0:b7415ae44dac 479 }
tsungta 0:b7415ae44dac 480
tsungta 0:b7415ae44dac 481 int spi_slave_read_multibyte(spi_mb_t *obj)
tsungta 0:b7415ae44dac 482 {
tsungta 0:b7415ae44dac 483 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 484 MBED_ASSERT(!p_spi_info->master);
tsungta 0:b7415ae44dac 485 while (!p_spi_info->flag.readable) {
tsungta 0:b7415ae44dac 486 }
tsungta 0:b7415ae44dac 487 p_spi_info->flag.readable = false;
tsungta 0:b7415ae44dac 488 return m_rx_buf;
tsungta 0:b7415ae44dac 489 }
tsungta 0:b7415ae44dac 490
tsungta 0:b7415ae44dac 491 void spi_slave_write_multibyte(spi_mb_t *obj, int value)
tsungta 0:b7415ae44dac 492 {
tsungta 0:b7415ae44dac 493 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 494 MBED_ASSERT(!p_spi_info->master);
tsungta 0:b7415ae44dac 495
tsungta 0:b7415ae44dac 496 //m_tx_buf = (uint8_t)value;
tsungta 0:b7415ae44dac 497 }
tsungta 0:b7415ae44dac 498
tsungta 0:b7415ae44dac 499 #if DEVICE_SPI_ASYNCH
tsungta 0:b7415ae44dac 500
tsungta 0:b7415ae44dac 501 void spi_master_transfer_multibyte(spi_mb_t *obj,
tsungta 0:b7415ae44dac 502 const void *tx, size_t tx_length,
tsungta 0:b7415ae44dac 503 void *rx, size_t rx_length, uint8_t bit_width,
tsungta 0:b7415ae44dac 504 uint32_t handler, uint32_t event, DMAUsage hint)
tsungta 0:b7415ae44dac 505 {
tsungta 0:b7415ae44dac 506 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 507 MBED_ASSERT(p_spi_info->master);
tsungta 0:b7415ae44dac 508 (void)hint;
tsungta 0:b7415ae44dac 509 (void)bit_width;
tsungta 0:b7415ae44dac 510
tsungta 0:b7415ae44dac 511 p_spi_info->handler = handler;
tsungta 0:b7415ae44dac 512 p_spi_info->event = event;
tsungta 0:b7415ae44dac 513
tsungta 0:b7415ae44dac 514 p_spi_info->flag.busy = true;
tsungta 0:b7415ae44dac 515 (void)nrf_drv_spi_transfer(MASTER_INST(obj),
tsungta 0:b7415ae44dac 516 (uint8_t const *)tx, tx_length,
tsungta 0:b7415ae44dac 517 (uint8_t *)rx, rx_length);
tsungta 0:b7415ae44dac 518 }
tsungta 0:b7415ae44dac 519
tsungta 0:b7415ae44dac 520 uint32_t spi_irq_handler_asynch_multibyte(spi_mb_t *obj)
tsungta 0:b7415ae44dac 521 {
tsungta 0:b7415ae44dac 522 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 523 MBED_ASSERT(p_spi_info->master);
tsungta 0:b7415ae44dac 524 return p_spi_info->event & SPI_EVENT_COMPLETE;
tsungta 0:b7415ae44dac 525 }
tsungta 0:b7415ae44dac 526
tsungta 0:b7415ae44dac 527 uint8_t spi_active_multibyte(spi_mb_t *obj)
tsungta 0:b7415ae44dac 528 {
tsungta 0:b7415ae44dac 529 spi_info_t *p_spi_info = SPI_INFO(obj);
tsungta 0:b7415ae44dac 530 MBED_ASSERT(p_spi_info->master);
tsungta 0:b7415ae44dac 531 return p_spi_info->flag.busy;
tsungta 0:b7415ae44dac 532 }
tsungta 0:b7415ae44dac 533
tsungta 0:b7415ae44dac 534 void spi_abort_asynch_multibyte(spi_mb_t *obj)
tsungta 0:b7415ae44dac 535 {
tsungta 0:b7415ae44dac 536 MBED_ASSERT(SPI_INFO(obj)->master);
tsungta 0:b7415ae44dac 537 nrf_drv_spi_abort(MASTER_INST(obj));
tsungta 0:b7415ae44dac 538 }
tsungta 0:b7415ae44dac 539
tsungta 0:b7415ae44dac 540 #endif // DEVICE_SPI_ASYNCH
tsungta 0:b7415ae44dac 541
tsungta 0:b7415ae44dac 542 #endif // DEVICE_SPI