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MSE-SoftwEng/pico-sensor/McuLib/src/McuGenericSWI2C.c
SylvanArnold 32618389d1 doc: renamed project
2025-05-06 13:07:01 +00:00

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/* ###################################################################
** This component module is generated by Processor Expert. Do not modify it.
** Filename : McuGenericSWI2C.h
** Project : FRDM-K64F_Generator
** Processor : MK64FN1M0VLL12
** Component : GenericSWI2C
** Version : Component 01.028, Driver 01.00, CPU db: 3.00.000
** Compiler : GNU C Compiler
** Date/Time : 2024-07-09, 10:10, # CodeGen: 829
** Abstract :
**
** Settings :
** Component name : McuGenericSWI2C
** Delay (ns) : 1250
** Trials : 256
** SDA : SDK_BitIO
** SCL : SDK_BitIO
** Wait : McuWait
** Yield : no
** Contents :
** ResetBus - bool McuGenericSWI2C_ResetBus(void);
** SendChar - uint8_t McuGenericSWI2C_SendChar(uint8_t Chr);
** RecvChar - uint8_t McuGenericSWI2C_RecvChar(uint8_t *Chr);
** SendBlock - uint8_t McuGenericSWI2C_SendBlock(void *Ptr, uint16_t Siz, uint16_t *Snt);
** SendBlockContinue - uint8_t McuGenericSWI2C_SendBlockContinue(void *Ptr, uint16_t Siz, uint16_t...
** RecvBlock - uint8_t McuGenericSWI2C_RecvBlock(void *Ptr, uint16_t Siz, uint16_t *Rcv);
** RecvBlockCustom - uint8_t McuGenericSWI2C_RecvBlockCustom(void *Ptr, uint16_t Siz, uint16_t...
** SendAck - void McuGenericSWI2C_SendAck(bool Ack);
** SendStop - uint8_t McuGenericSWI2C_SendStop(void);
** SelectSlave - uint8_t McuGenericSWI2C_SelectSlave(uint8_t Slv);
** GetSelected - uint8_t McuGenericSWI2C_GetSelected(uint8_t *Slv);
** Deinit - void McuGenericSWI2C_Deinit(void);
** Init - void McuGenericSWI2C_Init(void);
**
** * Copyright (c) 2014-2024, Erich Styger
** * Web: https://mcuoneclipse.com
** * SourceForge: https://sourceforge.net/projects/mcuoneclipse
** * Git: https://github.com/ErichStyger/McuOnEclipse_PEx
** * 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.
** *
** * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
** * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
** * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
** * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
** * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
** * (INCLUDING, BUT NOT LIMITED TO, 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.
** ###################################################################*/
/*!
** @file McuGenericSWI2C.h
** @version 01.00
** @brief
**
*/
/*!
** @addtogroup McuGenericSWI2C_module McuGenericSWI2C module documentation
** @{
*/
/* MODULE McuGenericSWI2C. */
#include "McuGenericSWI2C.h"
#include "McuWait.h" /* waiting routines */
#include "McuLib.h" /* SDK defines */
#include "SDA1.h" /* SDA pin */
#include "SCL1.h" /* SCL pin */
/* Internal method prototypes */
static void Delay(void);
static uint8_t Read(void);
static bool GetAck(void);
static void Write(uint8_t Data);
static void InternalStop(void);
#if McuLib_CONFIG_SDK_USE_FREERTOS
/* include RTOS header files */
#include "FreeRTOS.h" /* for yielding */
#include "task.h"
#endif
#if McuLib_CONFIG_SDK_USE_FREERTOS && McuGenericSWI2C_CONFIG_DO_YIELD
#define McuGenericSWI2C_OSYIELD() taskYIELD()
#else
#define McuGenericSWI2C_OSYIELD() /* do nothing */
#endif
#define OUTPUT 1U
#define INPUT 0U
#define WRITE 0U
#define READ 1U
static uint8_t SlaveAddr; /* destination slave address */
#define SCL_SetDir(dir) SCL1_SetDir(dir)
#define SCL_ClrVal() SCL1_ClrVal()
#define SCL_GetVal() SCL1_GetVal()
#define SDA_SetDir(dir) SDA1_SetDir(dir)
#define SDA_ClrVal() SDA1_ClrVal()
#define SDA_GetVal() SDA1_GetVal()
#if McuLib_CONFIG_SDK_VERSION_USED == McuLib_CONFIG_SDK_PROCESSOR_EXPERT
#define SCL_Init() /* Init does not exist with Processor Expert API */
#define SCL_Deinit() /* Deinit does not exist with Processor Expert API */
#define SDA_Init() /* Init does not exist with Processor Expert API */
#define SDA_Deinit() /* Deinit does not exist with Processor Expert API */
#else
#define SCL_Init() SCL1_Init()
#define SCL_Deinit() SCL1_Deinit()
#define SDA_Init() SDA1_Init()
#define SDA_Deinit() SDA1_Deinit()
#endif
static uint8_t SendStart(void) {
uint16_t timeout;
SDA_SetDir((bool)INPUT); /* SDA HIGH - START SETUP*/
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay(); /* CLOCK HIGH PULSE & BUS FREE TIME */
/* check that we have a valid start condition: SDA needs to be high */
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
if (timeout==0) {
InternalStop();
return ERR_BUSY;
}
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* START CONDITION */
Delay(); /* START HOLD TIME */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
return ERR_OK;
}
uint8_t McuGenericSWI2C_GetDeviceID(uint8_t deviceAddr, uint32_t *pId)
{
uint16_t Trial;
bool Acknowledge;
uint8_t id[3];
const uint8_t reserved = 0b11111000;
Trial = McuGenericSWI2C_CONFIG_NOF_TRIALS;
do {
if (SendStart()!=ERR_OK) {
return ERR_BUSY;
}
Write((uint8_t)(reserved + WRITE));
Acknowledge = GetAck();
Acknowledge = FALSE;
--Trial;
} while ((Trial != 0U) && Acknowledge);
if (Acknowledge) { /* WRONG ACKNOWLEDGE */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
InternalStop();
return ERR_BUSY;
} else {
/* restart here: send a start */
if (SendStart()!=ERR_OK) {
return ERR_BUSY;
}
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
Write((uint8_t)(reserved + READ));
Delay();
id[0] = Read();
id[1] = Read();
id[2] = Read();
McuGenericSWI2C_SendAck((bool)McuGenericSWI2C_NOACK);
pId[0] = id[0];
pId[1] = id[1];
pId[2] = id[2];
return ERR_OK;
}
/*
** ===================================================================
** Method : Delay (component GenericSWI2C)
**
** Description :
** This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
static void Delay(void)
{
McuGenericSWI2C_OSYIELD();
McuWait_Waitns(McuGenericSWI2C_CONFIG_DELAY_NS);
}
/*
** ===================================================================
** Method : Write (component GenericSWI2C)
**
** Description :
** This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
static void Write(uint8_t Data)
{
uint8_t Shift;
uint8_t I;
uint16_t timeout;
Shift = 0x80U;
for (I = 0x08U; I != 0U; I--) {
if (Data & Shift) {
SDA_SetDir((bool)INPUT); /* SDA HIGH */
} else {
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* SDA LOW */
}
Delay();
Shift = (uint8_t)(Shift >> 1);
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay();
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SCL_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
}
/*
** ===================================================================
** Method : Read (component GenericSWI2C)
**
** Description :
** This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
static uint8_t Read(void)
{
uint8_t Shift;
uint8_t I;
uint16_t timeout;
Shift = 0U;
SDA_SetDir((bool)INPUT); /* SDA INPUT MODE */
Delay(); /* give SDA setup time */
for (I = 0x08U; I != 0U; I--) {
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay();
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SCL_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
Shift = (uint8_t)(Shift << 1);
if (SDA_GetVal()) {
Shift++;
}
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
return Shift;
}
/*
** ===================================================================
** Method : GetAck (component GenericSWI2C)
**
** Description :
** This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
static bool GetAck(void)
{
uint16_t timeout;
SDA_SetDir((bool)INPUT); /* SDA HIGH */
Delay();
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay();
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SCL_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
return((bool)SDA_GetVal()); /* ACKNOWLEDGE VALUE */
}
/*
** ===================================================================
** Method : SendAck (component GenericSWI2C)
**
** Description :
** The method sends ACK to the bus.
** Parameters :
** NAME - DESCRIPTION
** Ack - If acknowledge is high or low
** Returns : Nothing
** ===================================================================
*/
void McuGenericSWI2C_SendAck(bool Ack)
{
uint16_t timeout;
Delay();
if (Ack) {
SDA_SetDir((bool)INPUT); /* MASTER NOACKNOWLEDGE - SDA HIGH */
} else {
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* MASTER ACKNOWLEDGE - SDA LOW */
}
Delay();
SCL_SetDir((bool)INPUT); /* HIGH CLOCK PULSE */
Delay();
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SCL_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* LOW CLOCK PULSE */
Delay();
SDA_SetDir((bool)INPUT); /* ACKNOWLEDGE END - SDA HIGH */
Delay();
}
/*
** ===================================================================
** Method : InternalStop (component GenericSWI2C)
**
** Description :
** This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
static void InternalStop(void)
{
Delay();
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* STOP SETUP */
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE + STOP SETUP TIME */
Delay();
SDA_SetDir((bool)INPUT); /* STOP CONDITION */
Delay(); /* stop setup time to SCL low (which might follow) */
}
/*
** ===================================================================
** Method : ResetBus (component GenericSWI2C)
**
** Description :
** Reset bus if needed.
** Parameters : None
** Returns :
** --- - TRUE if bus is idle, FALSE if bus is
** busy/hung
** ===================================================================
*/
bool McuGenericSWI2C_ResetBus(void)
{
char i;
if(SDA_GetVal() && SCL_GetVal()) {
return TRUE;
}
SCL_SetDir((bool)INPUT);
SDA_SetDir((bool)INPUT);
Delay();
if(!SCL_GetVal()) {
return FALSE; /* SCL held low externally, nothing we can do */
}
for(i = 0; i<9; i++) { /* up to 9 clocks until SDA goes high */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal();
Delay();
SCL_SetDir((bool)INPUT);
Delay();
if( SDA_GetVal()) {
break; /* finally SDA high so we can generate a STOP */
}
} /* for */
if(!SDA_GetVal()) {
return FALSE; /* after 9 clocks still nothing */
}
InternalStop();
return(SDA_GetVal() && SCL_GetVal()); /* both high then we succeeded */
}
/*
** ===================================================================
** Method : SendChar (component GenericSWI2C)
**
** Description :
** When working as a MASTER, this method writes 7 bits of slave
** address plus R/W bit = 0 to the I2C bus and then writes one
** character (byte) to the bus. The slave address must be
** specified before by the "SelectSlave" method or in the
** component initialization section of 'Slave address init'
** property. When working as the SLAVE, this method writes one
** character (byte) to the bus. If the ERR_NOTAVAIL error code
** returned, the char is successfully sent to master but the
** master device responds by an acknowledgment instead of no
** acknowledgment at the end of transfer. 'OnError' event is
** called in this case.
** Parameters :
** NAME - DESCRIPTION
** Chr - Character to send
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_BUSY - The slave device is busy, it
** does not respond by the acknowledgment
** (MASTER mode only)
** ERR_NOTAVAIL - The master device sends
** acknowledgment instead of no acknowledgment
** after the last byte transfer (SLAVE mode
** only)
** ERR_DISABLED - Device is disabled
** ERR_BUSOFF - Clock timeout elapsed (SLAVE
** mode only)
** ===================================================================
*/
uint8_t McuGenericSWI2C_SendChar(uint8_t Chr)
{
uint16_t Trial;
bool Acknowledge;
uint16_t timeout;
Trial = McuGenericSWI2C_CONFIG_NOF_TRIALS;
do {
SDA_SetDir((bool)INPUT); /* SDA HIGH - START SETUP*/
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay(); /* CLOCK HIGH PULSE & BUS FREE TIME */
/* check that we have a valid start condition: SDA needs to be high */
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
if (timeout==0) {
InternalStop();
return ERR_BUSY;
}
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* START CONDITION */
Delay(); /* START HOLD TIME */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
Write((uint8_t)(SlaveAddr + WRITE));
Acknowledge = GetAck();
--Trial;
} while ((Trial != 0U) && Acknowledge);
if (Acknowledge) { /* WRONG ACKNOWLEDGE */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
InternalStop();
return ERR_BUSY;
} else {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
Write(Chr);
if (GetAck()) { /* WRONG ACKNOWLEDGE */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
InternalStop();
return ERR_BUSY;
} else {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
return ERR_OK;
}
/*
** ===================================================================
** Method : RecvChar (component GenericSWI2C)
**
** Description :
** When working as a MASTER, this method writes 7 bits of slave
** address plus R/W bit = 1 to the I2C bus and then reads one
** character (byte) from the bus. The slave address must be
** specified before by the "SelectSlave" method or in the
** component initialization section of 'Slave address init'
** property. When working as a SLAVE, this method reads one
** character (byte) from the bus.
** Parameters :
** NAME - DESCRIPTION
** * Chr - Pointer to received character
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_BUSY - The slave device is busy, it
** does not respond by the acknowledgment
** (MASTER mode only)
** ERR_DISABLED - Device is disabled
** ERR_BUSOFF - Clock timeout elapsed (SLAVE
** mode only)
** ===================================================================
*/
uint8_t McuGenericSWI2C_RecvChar(uint8_t *Chr)
{
uint16_t Trial;
bool Acknowledge;
uint16_t timeout;
Trial = McuGenericSWI2C_CONFIG_NOF_TRIALS;
do {
SDA_SetDir((bool)INPUT); /* SDA HIGH - START SETUP */
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay(); /* CLOCK HIGH PULSE & BUS FREE TIME */
/* check that we have a valid start condition: SDA needs to be high */
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
if (timeout==0) {
InternalStop();
return ERR_BUSY;
}
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* START CONDITION */
Delay(); /* START HOLD TIME */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
Write((uint8_t)(SlaveAddr + READ));
Acknowledge = GetAck();
--Trial;
} while ((Trial != 0U) && Acknowledge);
if (Acknowledge) {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
InternalStop();
return ERR_BUSY;
} else {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
*Chr = Read();
McuGenericSWI2C_SendAck((bool)McuGenericSWI2C_NOACK);
return ERR_OK;
}
/*
** ===================================================================
** Method : SendBlock (component GenericSWI2C)
**
** Description :
** When working as a MASTER, this method writes 7 bits of slave
** address plus R/W bit = 0 to the I2C bus and then writes the
** block of characters to the bus. If the component is disabled
** (by the "Disable" method or initialization), the block is
** moved to the output buffer if the 'Output buffer size'
** property is different from zero. The content of the output
** buffer is sent immediately with the stop condition at the
** end when the component is enabled by the "Enable" method.
** After the output buffer transmission, the whole output
** buffer is cleared. The slave address must be specified
** before by the "SelectSlave" method or in component
** initialization section of 'Slave address init' property.
** When working as a SLAVE, this method writes block of
** characters to the bus. If the ERR_NOTAVAIL error code is
** returned, the whole block is successfully sent to a master
** but the master device responds by an acknowledgment instead
** of no acknowledgment sent at the end of the last block byte
** transfer. 'OnError' event is called in this case.
** Parameters :
** NAME - DESCRIPTION
** * Ptr - A pointer to the block of data to send
** Siz - The size of the block
** * Snt - A pointer to the number of data that are
** sent (copied to buffer)
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_BUSY - The slave device is busy, it
** does not respond by the acknowledgment
** (MASTER mode only)
** ERR_TXFULL - Output buffer is full (MASTER
** mode only)
** ERR_NOTAVAIL - The master device sends
** acknowledgment instead of no acknowledgment
** after the last byte transfer (SLAVE mode
** only)
** ERR_DISABLED - Device is disabled
** ERR_BUSOFF - Clock timeout elapsed (SLAVE
** mode only)
** ===================================================================
*/
uint8_t McuGenericSWI2C_SendBlock(void *Ptr, uint16_t Siz, uint16_t *Snt)
{
register uint16_t I;
bool Acknowledge;
uint16_t Trial;
uint16_t timeout;
*Snt = 0U;
Trial = McuGenericSWI2C_CONFIG_NOF_TRIALS;
do {
SDA_SetDir((bool)INPUT); /* SDA HIGH - START SETUP */
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay(); /* CLOCK HIGH PULSE + BUS FREE TIME */
/* check that we have a valid start condition: SDA needs to be high */
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
if (timeout==0) {
return ERR_BUSY;
}
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* START CONDITION */
Delay(); /* START HOLD TIME */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
Write((uint8_t)(SlaveAddr + WRITE));
Acknowledge = GetAck();
--Trial;
} while ((Trial != 0U) && Acknowledge);
if (Acknowledge) {
return ERR_BUSY;
} else {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
for (I = 0U; I < Siz; I++) {
Write (*((const uint8_t*)Ptr + I) );
if (GetAck()) {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
InternalStop();
return ERR_BUSY;
} else {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
++(*Snt);
}
Delay();
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
if (timeout==0) {
return ERR_BUSY;
}
return ERR_OK;
}
/*
** ===================================================================
** Method : SendBlockContinue (component GenericSWI2C)
**
** Description :
** Same is SendBlock() but does not send start condition. When
** working as a MASTER, this method writes 7 bits of slave
** address plus R/W bit = 0 to the I2C bus and then writes the
** block of characters to the bus. If the component is disabled
** (by the "Disable" method or initialization), the block is
** moved to the output buffer if the 'Output buffer size'
** property is different from zero. The content of the output
** buffer is sent immediately with the stop condition at the
** end when the component is enabled by the "Enable" method.
** After the output buffer transmission, the whole output
** buffer is cleared. The slave address must be specified
** before by the "SelectSlave" method or in component
** initialization section of 'Slave address init' property.
** When working as a SLAVE, this method writes block of
** characters to the bus. If the ERR_NOTAVAIL error code is
** returned, the whole block is successfully sent to a master
** but the master device responds by an acknowledgment instead
** of no acknowledgment sent at the end of the last block byte
** transfer. 'OnError' event is called in this case.
** Parameters :
** NAME - DESCRIPTION
** * Ptr - A pointer to the block of data to send
** Siz - The size of the block
** * Snt - A pointer to the number of data that are
** sent (copied to buffer)
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_BUSY - The slave device is busy, it
** does not respond by the acknowledgment
** (MASTER mode only)
** ERR_TXFULL - Output buffer is full (MASTER
** mode only)
** ERR_NOTAVAIL - The master device sends
** acknowledgment instead of no acknowledgment
** after the last byte transfer (SLAVE mode
** only)
** ERR_DISABLED - Device is disabled
** ERR_BUSOFF - Clock timeout elapsed (SLAVE
** mode only)
** ===================================================================
*/
uint8_t McuGenericSWI2C_SendBlockContinue(void *Ptr, uint16_t Siz, uint16_t *Snt)
{
register uint16_t I;
uint16_t timeout;
*Snt = 0U;
for (I = 0U; I < Siz; I++) {
Write (*((const uint8_t*)Ptr + I) );
if (GetAck()) {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
InternalStop();
return ERR_BUSY;
} else {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
++(*Snt);
}
Delay();
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
if (timeout==0) {
return ERR_BUSY;
}
return ERR_OK;
}
/*
** ===================================================================
** Method : RecvBlockCustom (component GenericSWI2C)
**
** Description :
** Same as RecvBlock(), but with additional flags to control
** the bus transfer.
** Parameters :
** NAME - DESCRIPTION
** * Ptr - A pointer to the block space for received
** data
** Siz - The size of the block
** * Rcv - A pointer to the number of actually
** received data
** flagsStart - Flags for start condition
** flagsAck - Flags for Ack after last byte
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_BUSY - The slave device is busy, it
** does not respond by the acknowledgment
** (MASTER mode only)
** ERR_DISABLED - Device is disabled
** ERR_BUSOFF - Clock timeout elapsed (SLAVE
** mode only)
** ===================================================================
*/
uint8_t McuGenericSWI2C_RecvBlockCustom(void *Ptr, uint16_t Siz, uint16_t *Rcv, McuGenericSWI2C_EnumStartFlags flagsStart, McuGenericSWI2C_EnumAckFlags flagsAck)
{
register uint16_t I;
bool Acknowledge;
uint16_t Trial;
uint16_t timeout;
*Rcv = 0U;
Trial = McuGenericSWI2C_CONFIG_NOF_TRIALS;
if (flagsStart == McuGenericSWI2C_SEND_START) {
do {
SDA_SetDir((bool)INPUT); /* SDA HIGH - START SETUP */
SCL_SetDir((bool)INPUT); /* CLOCK HIGH PULSE */
Delay(); /* CLOCK HIGH PULSE + BUS FREE TIME */
/* check that we have a valid start condition: SDA needs to be high */
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U) && (timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
Delay();
if (timeout==0) {
/* InternalStop(); */
return ERR_BUSY;
}
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* START CONDITION */
Delay(); /* START HOLD TIME */
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
Write((uint8_t)(SlaveAddr + READ));
Acknowledge = GetAck();
--Trial;
} while ((Trial != 0U) && Acknowledge);
if (Acknowledge) {
/* SCL_SetDir((bool)OUTPUT); */
/* SCL_ClrVal(); */ /* CLOCK LOW PULSE */
/* InternalStop(); */
return ERR_BUSY;
} else {
SCL_SetDir((bool)OUTPUT);
SCL_ClrVal(); /* CLOCK LOW PULSE */
Delay();
}
} /* McuGenericSWI2C_SEND_START */
for (I = 0U; I < Siz; I++) {
*((uint8_t *)Ptr + I) = Read();
timeout = McuGenericSWI2C_CONFIG_TIMEOUT_COUNTER_VALUE;
while((SDA_GetVal()==0U)&&(timeout!=0U)) { /* WAIT FOR CLOCK HIGH PULSE */
timeout--;
McuGenericSWI2C_OSYIELD();
}
if (timeout==0) {
/* InternalStop(); */
return ERR_BUSY;
}
if (I == (Siz - 1U)) {
if(flagsAck == McuGenericSWI2C_SEND_LAST_ACK){
McuGenericSWI2C_SendAck((bool)McuGenericSWI2C_NOACK);
}
} else {
McuGenericSWI2C_SendAck((bool)McuGenericSWI2C_ACK);
}
++(*Rcv);
}
return ERR_OK;
}
/*
** ===================================================================
** Method : RecvBlock (component GenericSWI2C)
**
** Description :
** When working as a MASTER, this method writes 7 bits of slave
** address plus R/W bit = 1 to the I2C bus and then reads the
** block of characters from the bus. The slave address must be
** specified before by the "SelectSlave" method or in component
** initialization section of 'Slave address init' property.
** When working as a SLAVE, this method reads the block of
** characters from the bus.
** Parameters :
** NAME - DESCRIPTION
** * Ptr - A pointer to the block space for received
** data
** Siz - The size of the block
** * Rcv - A pointer to the number of actually
** received data
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_BUSY - The slave device is busy, it
** does not respond by the acknowledgment
** (MASTER mode only)
** ERR_DISABLED - Device is disabled
** ERR_BUSOFF - Clock timeout elapsed (SLAVE
** mode only)
** ===================================================================
*/
uint8_t McuGenericSWI2C_RecvBlock(void *Ptr, uint16_t Siz, uint16_t *Rcv)
{
return McuGenericSWI2C_RecvBlockCustom(Ptr, Siz, Rcv, McuGenericSWI2C_SEND_START, McuGenericSWI2C_SEND_LAST_ACK);
}
/*
** ===================================================================
** Method : SendStop (component GenericSWI2C)
**
** Description :
** When working as a MASTER, if the 'Automatic stop condition'
** property value is 'no', this method sends a valid stop
** condition to the serial data line of the I2C bus to
** terminate the communication on the bus after using send
** methods. This method is enabled only if the component is in
** MASTER mode and 'Automatic stop condition' property value is
** 'no'
** Parameters : None
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_DISABLED - Device is disabled
** ===================================================================
*/
uint8_t McuGenericSWI2C_SendStop(void)
{
Delay();
SDA_SetDir((bool)OUTPUT);
SDA_ClrVal(); /* STOP SETUP */
Delay();
SCL_SetDir((bool)INPUT); /* HIGH CLOCK PULSE + STOP SETUP TIME */
Delay();
SDA_SetDir((bool)INPUT); /* STOP CONDITION */
Delay(); /* add stop time */
return ERR_OK;
}
/*
** ===================================================================
** Method : SelectSlave (component GenericSWI2C)
**
** Description :
** When working as a MASTER, this method selects a new slave
** for communication by its slave address value. Any send or
** receive method are directed to or from the selected device,
** until a new slave device is selected by this method. If the
** selected slave uses 10-bit slave addressing, as the
** parameter 7 bits must be passed, which involves 10-bit
** addressing (11110XX), including two MSBs of slave address
** (XX). The second byte of the 10-bit slave address must be
** sent to the slave as a general character of send methods.
** This method is available only if the component is in MASTER
** mode.
** Parameters :
** NAME - DESCRIPTION
** Slv - Slave address value
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ERR_DISABLED - Device is disabled
** ===================================================================
*/
uint8_t McuGenericSWI2C_SelectSlave(uint8_t Slv)
{
SlaveAddr = (uint8_t)(Slv<<1);
return ERR_OK;
}
/*
** ===================================================================
** Method : GetSelected (component GenericSWI2C)
**
** Description :
** When working as a MASTER, this method returns the
** identification address value of the slave, which is
** currently selected for communication with the master. If the
** current slave uses 10-bit slave addressing, the method
** returns the first 7 bits only, which involves 10-bit
** addressing (11110XX), including two MSBs of the slave
** address (XX). This method is not able to return the rest
** value of 10-bit slave address. This method is available only
** if the component is in MASTER mode.
** Parameters :
** NAME - DESCRIPTION
** * Slv - A pointer to the current selected slave
** address value
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ===================================================================
*/
uint8_t McuGenericSWI2C_GetSelected(uint8_t *Slv)
{
*Slv = (uint8_t)(SlaveAddr>>1);
return ERR_OK;
}
/*
** ===================================================================
** Method : Init (component GenericSWI2C)
**
** Description :
** Initializes the associated peripheral(s) and the components
** internal variables.
** Parameters : None
** Returns : Nothing
** ===================================================================
*/
void McuGenericSWI2C_Init(void)
{
SlaveAddr = 0;
SDA_Init();
SCL_Init();
}
/*
** ===================================================================
** Method : Deinit (component GenericSWI2C)
**
** Description :
** Driver de-initialization method.
** Parameters : None
** Returns : Nothing
** ===================================================================
*/
void McuGenericSWI2C_Deinit(void)
{
SCL_Deinit();
SDA_Deinit();
SlaveAddr = 0;
}
/* END McuGenericSWI2C. */
/*!
** @}
*/
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