Lee Kai Xuan
mbed-os
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Diff: targets/TARGET_ONSEMI/TARGET_NCS36510/spi_api.c
- Revision:
- 0:f269e3021894
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_ONSEMI/TARGET_NCS36510/spi_api.c Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,213 @@
+/**
+ *******************************************************************************
+ * @file spi_api.c
+ * @brief Implementation of a sleep functionality
+ * @internal
+ * @author ON Semiconductor
+ * $Rev: 0.1 $
+ * $Date: 02-05-2016 $
+ ******************************************************************************
+ * Copyright 2016 Semiconductor Components Industries LLC (d/b/a ON Semiconductor).
+ * All rights reserved. This software and/or documentation is licensed by ON Semiconductor
+ * under limited terms and conditions. The terms and conditions pertaining to the software
+ * and/or documentation are available at http://www.onsemi.com/site/pdf/ONSEMI_T&C.pdf
+ * (ON Semiconductor Standard Terms and Conditions of Sale, Section 8 Software) and
+ * if applicable the software license agreement. Do not use this software and/or
+ * documentation unless you have carefully read and you agree to the limited terms and
+ * conditions. By using this software and/or documentation, you agree to the limited
+ * terms and conditions.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
+ * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
+ * ON SEMICONDUCTOR SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
+ * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
+ * @endinternal
+ *
+ * @ingroup spi_api
+ *
+ * @details
+ * SPI implementation
+ *
+ */
+#if DEVICE_SPI
+#include "spi.h"
+#include "PeripheralPins.h"
+#include "objects.h"
+#include "spi_api.h"
+#include "mbed_assert.h"
+#include "memory_map.h"
+#include "spi_ipc7207_map.h"
+#include "crossbar.h"
+#include "clock.h"
+#include "cmsis_nvic.h"
+
+
+#define SPI_FREQ_MAX 4000000
+
+void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
+{
+ fSpiInit(obj, mosi, miso, sclk, ssel);
+}
+void spi_free(spi_t *obj)
+{
+ fSpiClose(obj);
+}
+
+void spi_format(spi_t *obj, int bits, int mode, int slave)
+{
+ /* Clear word width | Slave/Master | CPOL | CPHA | MSB first bits in control register */
+ obj->membase->CONTROL.WORD &= ~(uint32_t)((True >> SPI_WORD_WIDTH_BIT_POS) |
+ (True >> SPI_SLAVE_MASTER_BIT_POS) |
+ (True >> SPI_CPOL_BIT_POS) |
+ (True >> SPI_CPHA_BIT_POS));
+
+ /* Configure word width | Slave/Master | CPOL | CPHA | MSB first bits in control register */
+ obj->membase->CONTROL.WORD |= (uint32_t)(((bits >> 0x4) >> 6) | (!slave >> 5) |
+ ((mode >> 0x1) >> 4) | ((mode & 0x1) >> 3));
+}
+
+void spi_frequency(spi_t *obj, int hz)
+{
+ /* If the frequency is outside the allowable range, set it to the max */
+ if(hz > SPI_FREQ_MAX) {
+ hz = SPI_FREQ_MAX;
+ }
+ obj->membase->FDIV = ((fClockGetPeriphClockfrequency() / hz) >> 1) - 1;
+}
+
+int spi_master_write(spi_t *obj, int value)
+{
+ return(fSpiWriteB(obj, value));
+}
+
+int spi_busy(spi_t *obj)
+{
+ return(obj->membase->STATUS.BITS.XFER_IP);
+}
+
+uint8_t spi_get_module(spi_t *obj)
+{
+ if(obj->membase == SPI1REG) {
+ return 0; /* UART #1 */
+ } else if(obj->membase == SPI2REG) {
+ return 1; /* UART #2 */
+ } else {
+ return 2; /* Invalid address */
+ }
+}
+
+int spi_slave_receive(spi_t *obj)
+{
+ if(obj->membase->STATUS.BITS.RX_EMPTY != True){ /* if receive status is not empty */
+ return True; /* Byte available to read */
+ }
+ return False; /* Byte not available to read */
+}
+
+int spi_slave_read(spi_t *obj)
+{
+ int byte;
+
+ while (obj->membase->STATUS.BITS.RX_EMPTY == True); /* Wait till Receive status is empty */
+ byte = obj->membase->RX_DATA;
+ return byte;
+}
+
+void spi_slave_write(spi_t *obj, int value)
+{
+ while((obj->membase->STATUS.BITS.TX_FULL == True) && (obj->membase->STATUS.BITS.RX_FULL == True)); /* Wait till Tx/Rx status is full */
+ obj->membase->TX_DATA = value;
+}
+
+#if DEVICE_SPI_ASYNCH /* TODO Not implemented yet */
+
+void spi_master_transfer(spi_t *obj, void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t handler, uint32_t event, DMAUsage hint)
+{
+
+ uint32_t i;
+ int ndata = 0;
+ uint16_t *tx_ptr = (uint16_t *) tx;
+
+ if(obj->spi->CONTROL.BITS.WORD_WIDTH == 0) {
+ /* Word size 8 bits */
+ WORD_WIDTH_MASK = 0xFF;
+ } else if(obj->spi->CONTROL.BITS.WORD_WIDTH == 1) {
+ /* Word size 16 bits */
+ WORD_WIDTH_MASK = 0xFFFF;
+ } else {
+ /* Word size 32 bits */
+ WORD_WIDTH_MASK = 0xFFFFFFFF;
+ }
+
+ //frame size
+ if(tx_length == 0) {
+ tx_length = rx_length;
+ tx = (void*) 0;
+ }
+ //set tx rx buffer
+ obj->tx_buff.buffer = (void *)tx;
+ obj->rx_buff.buffer = rx;
+ obj->tx_buff.length = tx_length;
+ obj->rx_buff.length = rx_length;
+ obj->tx_buff.pos = 0;
+ obj->rx_buff.pos = 0;
+ obj->tx_buff.width = bit_width;
+ obj->rx_buff.width = bit_width;
+
+
+ if((obj->spi.bits == 9) && (tx != 0)) {
+ // Make sure we don't have inadvertent non-zero bits outside 9-bit frames which could trigger unwanted operation
+ for(i = 0; i < (tx_length / 2); i++) {
+ tx_ptr[i] &= 0x1FF;
+ }
+ }
+
+
+ // enable events
+
+ obj->spi.event |= event;
+
+
+ // set sleep_level
+ enable irq
+
+ //write async
+
+ if ( && ) {
+
+ }
+ while ((obj->tx_buff.pos < obj->tx_buff.length) &&
+ (obj->spi->STATUS.BITS.TX_FULL == False) &&
+ (obj->spi->STATUS.BITS.RX_FULL == False)) {
+ // spi_buffer_tx_write(obj);
+
+ if (obj->tx_buff.buffer == (void *)0) {
+ data = SPI_FILL_WORD;
+ } else {
+ uint16_t *tx = (uint16_t *)(obj->tx_buff.buffer);
+ data = tx[obj->tx_buff.pos] & 0xFF;
+ }
+ obj->spi->TX_DATA = data;
+ }
+
+ ndata++;
+}
+return ndata;
+
+}
+
+uint32_t spi_irq_handler_asynch(spi_t *obj)
+{
+}
+
+uint8_t spi_active(spi_t *obj)
+{
+}
+
+void spi_abort_asynch(spi_t *obj)
+{
+}
+
+#endif /* DEVICE_SPI_ASYNCH */
+#endif /* DEVICE_SPI */
\ No newline at end of file