Merge SPI driver from https://github.com/analogdevicesinc/no-OS
This commit is contained in:
Ian Martin
commit
6d36c83513
2 changed files with 527 additions and 0 deletions
418
cpu/rl78/Communication.c
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418
cpu/rl78/Communication.c
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/***************************************************************************//**
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* @file Communication.c
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* @brief Implementation of the Communication Driver for RL78G14 processor.
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* @author DBogdan (dragos.bogdan@analog.com)
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********************************************************************************
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||||
* Copyright 2012(c) Analog Devices, Inc.
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
* - Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* - Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* - Neither the name of Analog Devices, Inc. nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
* - The use of this software may or may not infringe the patent rights
|
||||
* of one or more patent holders. This license does not release you
|
||||
* from the requirement that you obtain separate licenses from these
|
||||
* patent holders to use this software.
|
||||
* - Use of the software either in source or binary form, must be run
|
||||
* on or directly connected to an Analog Devices Inc. component.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
********************************************************************************
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||||
* SVN Revision: $WCREV$
|
||||
*******************************************************************************/
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||||
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/******************************************************************************/
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/***************************** Include Files **********************************/
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/******************************************************************************/
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#include "Communication.h" /* Communication definitions */
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#include "RDKRL78G14.h" /* RDKRL78G14 definitions */
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char IICA0_Flag;
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/******************************************************************************/
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/************************ Functions Definitions *******************************/
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/******************************************************************************/
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/***************************************************************************//**
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* @brief I2C interrupt service routine.
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*
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* @return None.
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*******************************************************************************/
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#pragma vector = INTIICA0_vect
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__interrupt static void
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IICA0_Interrupt(void)
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{
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IICA0_Flag = 1;
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}
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/***************************************************************************//**
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* @brief Initializes the SPI communication peripheral.
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*
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* @param lsbFirst - Transfer format (0 or 1).
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* Example: 0x0 - MSB first.
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* 0x1 - LSB first.
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* @param clockFreq - SPI clock frequency (Hz).
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* Example: 1000 - SPI clock frequency is 1 kHz.
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* @param clockPol - SPI clock polarity (0 or 1).
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* Example: 0x0 - Idle state for clock is a low level; active
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* state is a high level;
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* 0x1 - Idle state for clock is a high level; active
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* state is a low level.
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* @param clockEdg - SPI clock edge (0 or 1).
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* Example: 0x0 - Serial output data changes on transition
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* from idle clock state to active clock state;
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* 0x1 - Serial output data changes on transition
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* from active clock state to idle clock state.
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*
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* @return status - Result of the initialization procedure.
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* Example: 0 - if initialization was successful;
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* -1 - if initialization was unsuccessful.
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*******************************************************************************/
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char
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SPI_Init(char lsbFirst,
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long clockFreq,
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char clockPol,
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char clockEdg)
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{
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long mckFreq = 32000000;
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char sdrValue = 0;
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char delay = 0;
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/* Configure the CS pins. */
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PMOD1_CS_OUT;
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PMOD1_CS_HIGH;
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PMOD2_CS_OUT;
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PMOD2_CS_HIGH;
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ST7579_CS_OUT;
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ST7579_CS_HIGH;
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/* Enable input clock supply. */
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SAU1EN = 1;
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/* After setting the SAUmEN bit to 1, be sure to set serial clock select
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register m (SPSm) after 4 or more fCLK clocks have elapsed. */
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NOP;
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NOP;
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NOP;
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NOP;
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/* Select the fCLK as input clock. */
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SPS1 = 0x0000;
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/* Select the CSI operation mode. */
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SMR11 = 0x0020;
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clockPol = 1 - clockPol;
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SCR11 = (clockEdg << 13) |
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(clockPol << 12) |
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0xC000 | /* Operation mode: Transmission/reception. */
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0x0007; /* 8-bit data length. */
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/* clockFreq = mckFreq / (sdrValue * 2 + 2) */
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sdrValue = mckFreq / (2 * clockFreq) - 1;
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SDR11 = sdrValue << 9;
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/* Set the clock and data initial level. */
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clockPol = 1 - clockPol;
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SO1 &= ~0x0202;
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SO1 |= (clockPol << 9) |
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(clockPol << 1);
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/* Enable output for serial communication operation. */
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SOE1 |= 0x0002;
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/* Configure the MISO pin as input. */
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PM7 |= 0x02;
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/* Configure SCLK and MOSI pins as output. */
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P7 |= 0x05;
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PM7 &= ~0x05;
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/* Wait for the changes to take place. */
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for(delay = 0; delay < 50; delay++) {
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NOP;
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}
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/* Set the SEmn bit to 1 and enter the communication wait status */
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SS1 |= 0x0002;
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return 0;
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}
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/***************************************************************************//**
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* @brief Writes data to SPI.
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*
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* @param slaveDeviceId - The ID of the selected slave device.
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* @param data - Data represents the write buffer.
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* @param bytesNumber - Number of bytes to write.
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*
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* @return Number of written bytes.
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*******************************************************************************/
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char
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SPI_Write(char slaveDeviceId,
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unsigned char *data,
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char bytesNumber)
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{
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char byte = 0;
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unsigned char read = 0;
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unsigned short originalSCR = 0;
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unsigned short originalSO1 = 0;
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if(slaveDeviceId == 1) {
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PMOD1_CS_LOW;
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}
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if(slaveDeviceId == 2) {
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PMOD2_CS_LOW;
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}
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if(slaveDeviceId == 3) {
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ST1 |= 0x0002;
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originalSO1 = SO1;
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originalSCR = SCR11;
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SO1 &= ~0x0202;
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SCR11 &= ~0x3000;
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SS1 |= 0x0002;
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ST7579_CS_LOW;
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}
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for(byte = 0; byte < bytesNumber; byte++) {
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SIO21 = data[byte];
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NOP;
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while(SSR11 & 0x0040) ;
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read = SIO21;
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}
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if(slaveDeviceId == 1) {
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PMOD1_CS_HIGH;
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}
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if(slaveDeviceId == 2) {
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PMOD2_CS_HIGH;
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}
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if(slaveDeviceId == 3) {
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ST7579_CS_HIGH;
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ST1 |= 0x0002;
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SO1 = originalSO1;
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SCR11 = originalSCR;
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SS1 |= 0x0002;
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}
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return bytesNumber;
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}
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/***************************************************************************//**
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* @brief Reads data from SPI.
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*
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* @param slaveDeviceId - The ID of the selected slave device.
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* @param data - Data represents the write buffer as an input parameter
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* and the read buffer as an output parameter.
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* @param bytesNumber - Number of bytes to read.
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*
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* @return Number of read bytes.
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*******************************************************************************/
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char
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SPI_Read(char slaveDeviceId,
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unsigned char *data,
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char bytesNumber)
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{
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char byte = 0;
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unsigned short originalSCR = 0;
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unsigned short originalSO1 = 0;
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if(slaveDeviceId == 1) {
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PMOD1_CS_LOW;
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}
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if(slaveDeviceId == 2) {
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PMOD2_CS_LOW;
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}
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if(slaveDeviceId == 3) {
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ST1 |= 0x0002;
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originalSO1 = SO1;
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originalSCR = SCR11;
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SO1 &= ~0x0202;
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SCR11 &= ~0x3000;
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SS1 |= 0x0002;
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ST7579_CS_LOW;
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}
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for(byte = 0; byte < bytesNumber; byte++) {
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SIO21 = data[byte];
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NOP;
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while(SSR11 & 0x0040) ;
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data[byte] = SIO21;
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}
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if(slaveDeviceId == 1) {
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PMOD1_CS_HIGH;
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}
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if(slaveDeviceId == 2) {
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PMOD2_CS_HIGH;
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}
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if(slaveDeviceId == 3) {
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ST7579_CS_HIGH;
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ST1 |= 0x0002;
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SO1 = originalSO1;
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SCR11 = originalSCR;
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SS1 |= 0x0002;
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}
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return bytesNumber;
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}
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/***************************************************************************//**
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* @brief Initializes the I2C communication peripheral.
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*
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* @param clockFreq - I2C clock frequency (Hz).
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* Example: 100000 - SPI clock frequency is 100 kHz.
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* @return status - Result of the initialization procedure.
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* Example: 0 - if initialization was successful;
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* -1 - if initialization was unsuccessful.
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*******************************************************************************/
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char
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I2C_Init(long clockFreq)
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{
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long fckFreq = 32000000;
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unsigned char wlValue = 0;
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unsigned char whValue = 0;
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/* Enable interrupts */
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EI;
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/* Enable input clock supply. */
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IICA0EN = 1;
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/* Set the fast mode plus operation. */
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SMC0 = 1;
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/* Set transfer rate. */
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wlValue = (unsigned char)((0.5 * fckFreq) / clockFreq);
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whValue = (unsigned char)(wlValue - (fckFreq / (10 * clockFreq)));
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IICWL0 = wlValue;
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IICWH0 = whValue;
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STCEN0 = 1; /* After operation is enabled, enable generation of a start */
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/* condition without detecting a stop condition. */
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WTIM0 = 1; /* Interrupt request is generated at the ninth clock’s */
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/* falling edge. */
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/* Enable I2C operation. */
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IICE0 = 1;
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/* Configure SCLA0 and SDAA0 pins as digital output. */
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P6 &= ~0x03;
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PM6 &= ~0x03;
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return 0;
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}
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/***************************************************************************//**
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* @brief Writes data to a slave device.
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*
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* @param slaveAddress - Adress of the slave device.
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* @param dataBuffer - Pointer to a buffer storing the transmission data.
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* @param bytesNumber - Number of bytes to write.
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* @param stopBit - Stop condition control.
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* Example: 0 - A stop condition will not be sent;
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* 1 - A stop condition will be sent.
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*
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* @return status - Number of read bytes or 0xFF if the slave address was
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* not acknowledged by the device.
|
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*******************************************************************************/
|
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char
|
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I2C_Write(char slaveAddress,
|
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unsigned char *dataBuffer,
|
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char bytesNumber,
|
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char stopBit)
|
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{
|
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char byte = 0;
|
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char status = 0;
|
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|
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IICAMK0 = 1; /* Interrupt servicing disabled. */
|
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STT0 = 1; /* Generate a start condition. */
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IICAMK0 = 0; /* Interrupt servicing enabled. */
|
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|
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/* Send the first byte. */
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IICA0_Flag = 0;
|
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IICA0 = (slaveAddress << 1);
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while(IICA0_Flag == 0) ;
|
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|
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if(ACKD0) { /* Acknowledge was detected. */
|
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for(byte = 0; byte < bytesNumber; byte++) {
|
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IICA0_Flag = 0;
|
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IICA0 = *dataBuffer;
|
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while(IICA0_Flag == 0) ;
|
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dataBuffer++;
|
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}
|
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status = bytesNumber;
|
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} else { /* Acknowledge was not detected. */
|
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status = 0xFF;
|
||||
}
|
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if(stopBit) {
|
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SPT0 = 1; /* Generate a stop condition. */
|
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while(IICBSY0) ; /* Wait until the I2C bus status flag is cleared. */
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
/***************************************************************************//**
|
||||
* @brief Reads data from a slave device.
|
||||
*
|
||||
* @param slaveAddress - Adress of the slave device.
|
||||
* @param dataBuffer - Pointer to a buffer that will store the received data.
|
||||
* @param bytesNumber - Number of bytes to read.
|
||||
* @param stopBit - Stop condition control.
|
||||
* Example: 0 - A stop condition will not be sent;
|
||||
* 1 - A stop condition will be sent.
|
||||
*
|
||||
* @return status - Number of read bytes or 0xFF if the slave address was
|
||||
* not acknowledged by the device.
|
||||
*******************************************************************************/
|
||||
char
|
||||
I2C_Read(char slaveAddress,
|
||||
unsigned char *dataBuffer,
|
||||
char bytesNumber,
|
||||
char stopBit)
|
||||
{
|
||||
char byte = 0;
|
||||
char status = 0;
|
||||
|
||||
IICAMK0 = 1; /* Interrupt servicing disabled. */
|
||||
STT0 = 1; /* Generate a start condition. */
|
||||
IICAMK0 = 0; /* Interrupt servicing enabled. */
|
||||
|
||||
/* Send the first byte. */
|
||||
IICA0_Flag = 0;
|
||||
IICA0 = (slaveAddress << 1) + 1;
|
||||
while(IICA0_Flag == 0) ;
|
||||
|
||||
if(ACKD0) { /* Acknowledge was detected. */
|
||||
ACKE0 = 1; /* Enable acknowledgment. */
|
||||
for(byte = 0; byte < bytesNumber; byte++) {
|
||||
if(byte == (bytesNumber - 1)) {
|
||||
ACKE0 = 0U; /* Disable acknowledgment. */
|
||||
}
|
||||
WREL0 = 1U; /* Cancel wait. */
|
||||
IICA0_Flag = 0;
|
||||
while(IICA0_Flag == 0) ;
|
||||
*dataBuffer = IICA0;
|
||||
dataBuffer++;
|
||||
}
|
||||
status = bytesNumber;
|
||||
} else { /* Acknowledge was not detected. */
|
||||
status = 0xFF;
|
||||
}
|
||||
if(stopBit) {
|
||||
SPT0 = 1; /* Generate a stop condition. */
|
||||
while(IICBSY0) ; /* Wait until the I2C bus status flag is cleared. */
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
109
cpu/rl78/Communication.h
Normal file
109
cpu/rl78/Communication.h
Normal file
|
|
@ -0,0 +1,109 @@
|
|||
/***************************************************************************//**
|
||||
* @file Communication.h
|
||||
* @brief Header file of the Communication Driver for RL78G14 processor.
|
||||
* @author DBogdan (dragos.bogdan@analog.com)
|
||||
********************************************************************************
|
||||
* Copyright 2012(c) Analog Devices, Inc.
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
* - Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* - Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* - Neither the name of Analog Devices, Inc. nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
* - The use of this software may or may not infringe the patent rights
|
||||
* of one or more patent holders. This license does not release you
|
||||
* from the requirement that you obtain separate licenses from these
|
||||
* patent holders to use this software.
|
||||
* - Use of the software either in source or binary form, must be run
|
||||
* on or directly connected to an Analog Devices Inc. component.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
********************************************************************************
|
||||
* SVN Revision: $WCREV$
|
||||
*******************************************************************************/
|
||||
#ifndef __COMMUNICATION_H__
|
||||
#define __COMMUNICATION_H__
|
||||
|
||||
/******************************************************************************/
|
||||
/***************************** Include Files **********************************/
|
||||
/******************************************************************************/
|
||||
#include "RDKRL78G14.h"
|
||||
|
||||
/******************************************************************************/
|
||||
/*************************** Macros Definitions *******************************/
|
||||
/******************************************************************************/
|
||||
#define SPI_CS_PIN_OUT PMOD1_CS_OUT
|
||||
#define SPI_CS_LOW PMOD1_CS_LOW
|
||||
#define SPI_CS_HIGH PMOD1_CS_HIGH
|
||||
#define SPI_MISO PMOD1_MISO
|
||||
|
||||
#define GPIO1_PIN_OUT PMOD1_GPIO1_PIN_OUT
|
||||
#define GPIO1_LOW PMOD1_GPIO1_LOW
|
||||
#define GPIO1_HIGH PMOD1_GPIO1_HIGH
|
||||
|
||||
#define GPIO2_PIN_OUT PMOD1_GPIO2_PIN_OUT
|
||||
#define GPIO2_LOW PMOD1_GPIO2_LOW
|
||||
#define GPIO2_HIGH PMOD1_GPIO2_HIGH
|
||||
|
||||
#define GPIO3_PIN_OUT PMOD1_GPIO3_PIN_OUT
|
||||
#define GPIO3_LOW PMOD1_GPIO3_LOW
|
||||
#define GPIO3_HIGH PMOD1_GPIO3_HIGH
|
||||
|
||||
#define GPIO4_PIN_OUT PMOD1_GPIO4_PIN_OUT
|
||||
#define GPIO4_LOW PMOD1_GPIO4_LOW
|
||||
#define GPIO4_HIGH PMOD1_GPIO4_HIGH
|
||||
|
||||
/******************************************************************************/
|
||||
/************************ Functions Declarations ******************************/
|
||||
/******************************************************************************/
|
||||
|
||||
/*! Initializes the SPI communication peripheral. */
|
||||
char SPI_Init(char lsbFirst,
|
||||
long clockFreq,
|
||||
char clockPol,
|
||||
char clockEdg);
|
||||
|
||||
/*! Writes data to SPI. */
|
||||
char SPI_Write(char slaveDeviceId,
|
||||
unsigned char *data,
|
||||
char bytesNumber);
|
||||
|
||||
/*! Reads data from SPI. */
|
||||
char SPI_Read(char slaveDeviceId,
|
||||
unsigned char *data,
|
||||
char bytesNumber);
|
||||
|
||||
/*! Initializes the I2C communication peripheral. */
|
||||
char I2C_Init(long clockFreq);
|
||||
|
||||
/*! Writes data to a slave device. */
|
||||
char I2C_Write(char slaveAddress,
|
||||
unsigned char *dataBuffer,
|
||||
char bytesNumber,
|
||||
char stopBit);
|
||||
|
||||
/*! Reads data from a slave device. */
|
||||
char I2C_Read(char slaveAddress,
|
||||
unsigned char *dataBuffer,
|
||||
char bytesNumber,
|
||||
char stopBit);
|
||||
|
||||
#endif /* __COMMUNICATION_H__ */
|
||||
Loading…
Reference in a new issue