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Merge pull request #1265 from Wiznet/mbed_dev4 

Wiznet - I2c -> gpio
pull/1278/head
Martin Kojtal 2015-07-31 14:52:52 +01:00
parent e4cd8bbd3e 20888331af
commit 9d276ebad7
7 changed files with 374 additions and 975 deletions
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12
libraries/mbed/targets/cmsis/TARGET_WIZNET/TARGET_W7500x/W7500x_gpio.c
View File

@ -176,7 +176,7 @@ uint8_t HAL_GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
return bitstatus;
}
uint8_t HAL_GPIO_ReadInputData(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
uint16_t HAL_GPIO_ReadInputData(GPIO_TypeDef* GPIOx)
{
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
return ((uint16_t)GPIOx->DATA);
@ -286,3 +286,13 @@ void HAL_PAD_AFConfig(PAD_Type Px, uint16_t GPIO_Pin, PAD_AF_TypeDef P_AF)
}
}
void GPIO_OutEnClr(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
GPIOx->OUTENCLR = GPIO_Pin;
}
void GPIO_OutEnSet(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
GPIOx->OUTENSET = GPIO_Pin;
}

5
libraries/mbed/targets/cmsis/TARGET_WIZNET/TARGET_W7500x/W7500x_gpio.h
View File

@ -117,7 +117,7 @@ void HAL_GPIO_DeInit(GPIO_TypeDef* GPIOx);
void HAL_GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct);
void HAL_GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct);
uint8_t HAL_GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin);
uint8_t HAL_GPIO_ReadInputData(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin);
uint16_t HAL_GPIO_ReadInputData(GPIO_TypeDef* GPIOx);
uint8_t HAL_GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin);
uint16_t HAL_GPIO_ReadOutputData(GPIO_TypeDef* GPIOx);
void HAL_GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin);
@ -126,6 +126,9 @@ void HAL_GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal)
void HAL_GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal);
void HAL_PAD_AFConfig(PAD_Type Px, uint16_t Pnum, PAD_AF_TypeDef P_AF);
void GPIO_OutEnClr(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin);
void GPIO_OutEnSet(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin);
#ifdef __cplusplus
}

783
libraries/mbed/targets/cmsis/TARGET_WIZNET/TARGET_W7500x/W7500x_i2c.c
View File

@ -1,589 +1,290 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of ARM Limited nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*******************************************************************************
*/
/*include -------------------------------------*/
#include <stdio.h>
#include "W7500x.h"
/** @defgroup I2C_Private_Functions
* @{
*/
GPIO_InitTypeDef GPIO_InitDef;
void i2c_loop_us(int us);
#define SCL GPIO_Pin_9
#define SDA GPIO_Pin_10
uint16_t buf[] ={0x00,0x01};
/**
* @brief Initializes the I2Cx peripheral according to the specified
* parameters in the I2C_InitStruct.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_InitStruct: pointer to a I2C_InitTypeDef structure that
* contains the configuration information for the specified I2C peripheral.
* @retval None
*/
uint32_t I2C_Init(I2C_TypeDef* I2Cx, I2C_ConfigStruct conf)
uint32_t I2C_Init(I2C_ConfigStruct* conf)
{
uint32_t mode;
uint8_t prescale;
uint16_t timeout;
uint16_t slave_address;
uint32_t scl_port_num;
uint32_t scl_pin_index;
uint32_t sda_port_num;
uint32_t sda_pin_index;
scl_port_num = I2C_PORT(conf->scl);
scl_pin_index = I2C_PIN_INDEX(conf->scl);
mode = conf.mode;
slave_address = conf.slave_address;
if(mode == I2C_Master)
{
prescale = conf.master.prescale;
timeout = conf.master.timeout;
sda_port_num = I2C_PORT(conf->sda);
sda_pin_index = I2C_PIN_INDEX(conf->sda);
I2C_CoreEn(I2Cx,ENABLE);
I2C_MasterSlave(I2Cx,ENABLE);
//SCL setting
GPIO_InitDef.GPIO_Pin = scl_pin_index;
GPIO_InitDef.GPIO_Mode = GPIO_Mode_OUT;
I2C_Prescale(I2Cx,prescale); // 0x61 //When PLL clk is 20MHz and Prescale value set 0x61, SCL is 100KHz
I2C_TimeoutSet(I2Cx,timeout); // 0xFFFF
HAL_GPIO_Init((GPIO_TypeDef*)(GPIOA_BASE + (scl_port_num << 24)), &GPIO_InitDef);
HAL_GPIO_SetBits((GPIO_TypeDef*)(GPIOA_BASE + (scl_port_num << 24)), scl_pin_index);
I2C_CoreEn(I2Cx,DISABLE);
}
else if(conf.mode == I2C_Slave)
{
I2C_AcknowledgeConfig(I2Cx,ENABLE);
I2C_SetSlavAddress(I2Cx,slave_address);
}
//SDA setting
GPIO_InitDef.GPIO_Pin = sda_pin_index;
GPIO_InitDef.GPIO_Mode = GPIO_Mode_IN;
HAL_GPIO_Init((GPIO_TypeDef*)(GPIOA_BASE + (sda_port_num << 24)), &GPIO_InitDef);
HAL_GPIO_ResetBits((GPIO_TypeDef*)(GPIOA_BASE + (sda_port_num << 24)), sda_pin_index);
//Pin muxing
HAL_PAD_AFConfig(scl_port_num, scl_pin_index, PAD_AF1);
HAL_PAD_AFConfig(sda_port_num, sda_pin_index, PAD_AF1);
return 0;
}
void I2C_WriteBitSCL(I2C_ConfigStruct* conf, uint8_t data)
{
uint32_t scl_port_num = I2C_PORT(conf->scl);
uint32_t scl_pin_index = I2C_PIN_INDEX(conf->scl);
if(data == 1)
HAL_GPIO_SetBits((GPIO_TypeDef*)(GPIOA_BASE + (scl_port_num << 24)), scl_pin_index);
else
return ERROR;
HAL_GPIO_ResetBits((GPIO_TypeDef*)(GPIOA_BASE + (scl_port_num << 24)), scl_pin_index);
I2C_AcknowledgeConfig(I2Cx,ENABLE);
return SUCCESS;
}
void I2C_DeInit(I2C_TypeDef* I2Cx)
void I2C_WriteBitSDA(I2C_ConfigStruct* conf, uint8_t data)
{
I2C_InterRst(I2Cx,ENABLE);
I2C_CoreEn(I2Cx, ENABLE);
I2C_InterRst(I2Cx,DISABLE);
I2C_CoreEn(I2Cx, DISABLE);
uint32_t sda_port_num = I2C_PORT(conf->sda);
uint32_t sda_pin_index = I2C_PIN_INDEX(conf->sda);
if(data == 1)
GPIO_OutEnClr((GPIO_TypeDef*)(GPIOA_BASE + (sda_port_num << 24)), sda_pin_index);
else
GPIO_OutEnSet((GPIO_TypeDef*)(GPIOA_BASE + (sda_port_num << 24)), sda_pin_index);
}
ErrorStatus I2C_Start(I2C_TypeDef* I2Cx, uint16_t slave_address, I2C_CTR ctr)
uint8_t I2C_ReadBitSDA(I2C_ConfigStruct* conf)
{
ErrorStatus ret;
uint32_t sda_port_num = I2C_PORT(conf->sda);
uint32_t sda_pin_index = I2C_PIN_INDEX(conf->sda);
I2C_GenerateSTART(I2Cx,ENABLE);
I2C_SendSlaveAddress(I2Cx,slave_address,(I2C_CTR)ctr);
I2C_GenerateSTART(I2Cx,DISABLE);
if(HAL_GPIO_ReadInputDataBit((GPIO_TypeDef*)(GPIOA_BASE + (sda_port_num << 24)), sda_pin_index))
return 1;
else
return 0;
ret=I2C_CheckEvent(I2Cx,I2C_ACKR);
return 0;
}
void I2C_Start(I2C_ConfigStruct* conf)
{
I2C_WriteBitSCL(conf, 1);
I2C_WriteBitSDA(conf, 1);
I2C_WriteBitSDA(conf, 0);
I2C_WriteBitSCL(conf, 0);
}
void I2C_Stop(I2C_ConfigStruct* conf)
{
I2C_WriteBitSCL(conf, 0);
I2C_WriteBitSDA(conf, 0);
I2C_WriteBitSCL(conf, 1);
I2C_WriteBitSDA(conf, 1);
}
uint8_t I2C_WriteByte(I2C_ConfigStruct* conf, uint8_t data)
{
int i;
uint8_t ret;
//Write byte
for(i=0; i<8; i++)
{
if((data << i) & 0x80)
I2C_WriteBitSDA(conf, 1);
else
I2C_WriteBitSDA(conf, 0);
I2C_WriteBitSCL(conf, 1);
I2C_WriteBitSCL(conf, 0);
}
//Make clk for receiving ack
I2C_WriteBitSDA(conf, 1);
I2C_WriteBitSCL(conf, 1);
//Read Ack/Nack
ret = I2C_ReadBitSDA(conf);
I2C_WriteBitSCL(conf, 0);
return ret;
}
void I2C_Stop(I2C_TypeDef* I2Cx)
void I2C_SendACK(I2C_ConfigStruct* conf)
{
I2C_GenerateSTOP(I2Cx,ENABLE);
I2C_GenerateSTOP(I2Cx,DISABLE);
GPIO_InitDef.GPIO_Pin = GPIO_Pin_9; // Set to Pin_9 (SCL0))
GPIO_InitDef.GPIO_Mode = GPIO_Mode_OUT; // Set to Mode Output
HAL_GPIO_Init(GPIOA, &GPIO_InitDef);
HAL_PAD_AFConfig(PAD_PA,GPIO_Pin_9, PAD_AF0); // PAD Config - LED used 2nd Function
I2C_WriteBitSDA(conf, 0);
I2C_WriteBitSCL(conf, 1);
I2C_WriteBitSCL(conf, 0);
}
void I2C_Reset(I2C_TypeDef* I2Cx)
void I2C_SendNACK(I2C_ConfigStruct* conf)
{
I2C_CoreEn(I2Cx,ENABLE);
// Maybe, it needs a little delay
I2C_CoreEn(I2Cx,DISABLE);
I2C_WriteBitSDA(conf, 1);
I2C_WriteBitSCL(conf, 1);
I2C_WriteBitSCL(conf, 0);
}
void I2C_SendData(I2C_TypeDef* I2Cx,uint16_t Data)
{
I2Cx -> TXR = (uint16_t)Data;
}
int8_t I2C_SendDataAck(I2C_TypeDef* I2Cx,uint16_t Data)
{
buf[0] = Data;
if(buf[0] == buf[1])
{
I2C_GPIO();
WriteByte(Data);
i2c_loop_us(1);
GPIO_I2C();
}
else
{
I2Cx -> TXR = (uint16_t)Data;
if(I2C_CheckEvent(I2Cx,I2C_ACKR) == ERROR)
{
return ERROR;
}
}
buf[1] = buf[0];
return SUCCESS;
}
int I2C_ReceiveData(I2C_TypeDef* I2Cx, int last)
{
if(last)
{
I2C_AcknowledgeConfig(I2Cx,DISABLE);
if( I2C_CheckEvent(I2Cx,I2C_ACKT) == ERROR ) {
return -1;
}
}
else if( I2C_CheckEvent(I2Cx,I2C_ACKT) == ERROR ) {
return -1;
}
return (uint8_t)I2Cx -> RXR;
}
int I2C_Burst_Read(I2C_TypeDef* I2Cx, uint16_t address, uint8_t *data, int length, int stop)
{
int recv_cnt;
if( I2C_Start(I2Cx,address,I2C_READ_SA7) == ERROR){
return -1;
}
for(recv_cnt=0;recv_cnt<length;recv_cnt++)
{
}
return recv_cnt;
}
int I2C_Burst_Write(I2C_TypeDef* I2Cx, uint16_t address, uint8_t *data, int length, int stop)
{
int cnt;
if( I2C_Start(I2Cx,address,I2C_WRITE_SA7) == ERROR)
{
return -1;
}
for(cnt=0;cnt<length;cnt++)
{
if( I2C_SendDataAck(I2Cx,data[cnt]) == ERROR )
{
I2C_Stop(I2Cx);
return -1;
}
}
// If not repeated start, send stop
if(stop)
{
I2C_Stop(I2Cx);
}
return length;
}
/**
* @brief Generates I2Cx communication START condition.
* @param I2Cx: where x can be 0 or 1 to select the I2C peripheral.
* @param NewState: NewState of the I2C START condition generation.
* This parameter can be: ENABLE or DISABLE.
* @retval None.
*/
void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState)
{
if(NewState != DISABLE)
{
I2Cx->CMDR = I2C_CMDR_STA;
}
else
{
I2Cx->CMDR = I2C_CMDR_STA;
}
}
/**
* @brief Generates I2Cx communication STOP condition.
* @param I2Cx: where x can be 0 or 1 to select the I2C peripheral.
* @param NewState: NewState of the I2C STOP condition generation.
* This parameter can be: ENABLE or DISABLE.
* @retval None.
*/
void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState)
{
if(NewState != DISABLE)
{
I2Cx->CMDR = I2C_CMDR_STO;
}
else
{
I2Cx->CMDR = I2C_CMDR_STO;
}
}
/**
* @brief Enables or disables the specified I2C acknowledge feature.
* @param I2Cx: where x can be 0 or 1 to select the I2C peripheral.
* @param NewState: NewState of the I2C Acknowledgement.
* This parameter can be: ENABLE or DISABLE.
* @retval None.
*/
void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState)
{
if(NewState != DISABLE) I2Cx -> CMDR = I2C_CMDR_ACK;
else I2Cx -> CMDR = I2C_CMDR_ACK;
}
/**
* @brief Generates I2Cx communication REGenerateSTART condition
* @param I2Cx: where x can be 0 or 1 to select the I2C peripheral.
* @param NewState: NewState of the I2C Acknowledgement.
* This parameter can be: ENABLE or DISABLE.
* @retval None.
*/
void I2C_RESTART(I2C_TypeDef * I2Cx, FunctionalState NewState)
{
if(NewState != DISABLE) I2Cx->CMDR = I2C_CMDR_RESTA;
else I2Cx->CMDR = I2C_CMDR_RESTA;
}
/**
* @brief Enable or disable the specified I2C Core_en feature
* @param I2Cx: where x can be 0 or 1 to select the I2C peripheral.
* @param NewState: NewState of the I2C Acknowledgement.
* This parameter can be: ENABLE or DISABLE.
* @retval None.
*/
void I2C_CoreEn(I2C_TypeDef* I2Cx,FunctionalState NewState)
{
/*Control*/
if(NewState != DISABLE) I2Cx -> CTR = I2C_CTR_COREEN;
else I2Cx -> CTR = I2C_CTR_COREEN;
}
void I2C_InterEn(I2C_TypeDef* I2Cx,FunctionalState NewState)
{
/*Control Interrupt Enable*/
if(NewState != DISABLE) I2Cx -> CTR = I2C_CTR_INTEREN;
else I2Cx -> CTR = I2C_CTR_INTEREN;
}
void I2C_MasterSlave(I2C_TypeDef* I2Cx,FunctionalState NewState)
{
/*Control MasterSlave select*/
if(NewState == ENABLE)
{
if( (I2Cx->CTR & I2C_CTR_MODE) != I2C_CTR_MODE )
{
I2Cx->CTR = I2C_CTR_MODE;
}
}
else // DISABLE
{
if( (I2Cx->CTR & I2C_CTR_MODE) == I2C_CTR_MODE )
{
I2Cx->CTR = I2C_CTR_MODE;
}
}
}
void I2C_ControlRW(I2C_TypeDef* I2Cx,FunctionalState NewState)
{
/*Control Read(receive)*/
if(NewState == ENABLE)
{
if( (I2Cx->CTR & I2C_CTR_CTRRWN) != I2C_CTR_CTRRWN )
{
I2Cx->CTR = I2C_CTR_CTRRWN;
}
}
else // DISABLE
{
if( (I2Cx->CTR & I2C_CTR_CTRRWN) == I2C_CTR_CTRRWN )
{
I2Cx->CTR = I2C_CTR_CTRRWN;
}
}
}
void I2C_ControlEn(I2C_TypeDef* I2Cx,FunctionalState NewState)
{
/*Control*/
if(NewState == ENABLE)
{
if( (I2Cx->CTR & I2C_CTR_CTEN) != I2C_CTR_CTEN )
{
I2Cx->CTR = I2C_CTR_CTEN;
}
}
else // DISABLE
{
if( (I2Cx->CTR & I2C_CTR_CTEN) == I2C_CTR_CTEN )
{
I2Cx->CTR = I2C_CTR_CTEN;
}
}
}
void I2C_InterRst(I2C_TypeDef* I2Cx,FunctionalState NewState)
{
/*Control*/
if(NewState == ENABLE)
{
if( (I2Cx->ISCR & I2C_ISCR_RST) != I2C_ISCR_RST )
{
I2Cx->ISCR = I2C_ISCR_RST;
}
}
else // DISABLE
{
if( (I2Cx->ISCR & I2C_ISCR_RST) == I2C_ISCR_RST )
{
I2Cx->ISCR = I2C_ISCR_RST;
}
}
}
void I2C_Prescale(I2C_TypeDef* I2Cx,uint16_t Data)
{
I2Cx -> PRER = (uint16_t)Data;
}
void I2C_TimeoutSet(I2C_TypeDef* I2Cx,uint16_t Data)
{
I2Cx -> TSR = (uint16_t)Data;
}
void I2C_SetSlavAddress(I2C_TypeDef* I2Cx,uint16_t Data)
{
I2Cx -> SADDR = (uint16_t)Data;
}
uint8_t I2C_StatusRead(I2C_TypeDef* I2Cx)
{
return (uint8_t)I2Cx -> SR;
}
ErrorStatus WaitEvent(I2C_TypeDef* I2Cx, uint32_t flag, FlagStatus status)
{
int Timeout=0,loopcnt=0;
Timeout = I2Cx->TSR;
if(status == SET)
{
for(loopcnt=Timeout; loopcnt>0; loopcnt--)
{
if( ((I2Cx->SR) & flag) == flag )
return SUCCESS;
}
}
else
{
for(loopcnt=Timeout; loopcnt>0; loopcnt--)
{
if( ((I2Cx->SR) & flag) != flag )
return SUCCESS;
}
}
return ERROR;
}
/**
* @brief Checks whether the specified I2C flag is set or not.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_EVENT: specifies the event to be checked.
*/
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx,I2C_SR sr)
{
switch(sr)
{
case(I2C_ACKR):
if( WaitEvent(I2Cx, I2C_SR_ACKR, SET) == ERROR) return ERROR;
if( WaitEvent(I2Cx, I2C_SR_ACKR, RESET) == ERROR) return ERROR;
break;
case(I2C_ACKT ):
if( WaitEvent(I2Cx, I2C_SR_ACKT, SET) == ERROR) return ERROR;
if( WaitEvent(I2Cx, I2C_SR_ACKT, RESET) == ERROR) return ERROR;
break;
case(I2C_OACKR):
if( WaitEvent(I2Cx, I2C_SR_ACKR, SET) == ERROR) return ERROR;
break;
case(I2C_SACKR ):
if( WaitEvent(I2Cx, I2C_SR_ACKR, RESET) == ERROR) return ERROR;
break;
case(I2C_BT ):
if( WaitEvent(I2Cx, I2C_SR_BT, RESET) == ERROR) return ERROR;
break;
default:
return ERROR;
}
return SUCCESS;
}
void I2C_SendSlaveAddress(I2C_TypeDef* I2Cx, uint8_t SlaveAddress,I2C_CTR Ctr)
{
switch(Ctr)
{
case(I2C_READ_SA7):
I2C_SendData(I2Cx,SlaveAddress|I2C_READ);
break;
case(I2C_WRITE_SA7):
I2C_SendData(I2Cx,SlaveAddress|I2C_WRITE);
break;
case(I2C_CTRWRITE_SA7):
case(I2C_CTRREAD_SA7):
I2C_SendData(I2Cx,SlaveAddress);
break;
default:
return;
}
}
int8_t I2C_Restart_Structure(I2C_TypeDef * I2Cx,uint32_t SlaveAddress,I2C_CTR Ctr)
{
I2C_RESTART(I2Cx,ENABLE);
I2C_SendSlaveAddress(I2Cx,SlaveAddress,Ctr);
if((I2C_CheckEvent(I2Cx,I2C_OACKR)) == ERROR )
{
return 0;
}
I2C_RESTART(I2Cx,DISABLE);
if((I2C_CheckEvent(I2Cx,I2C_SACKR)) == ERROR)
{
return 0;
}
return 1;
}
/**
* @brief Reads the specified I2C register and returns its value.
* @param I2C_Register: specifies the register to read.
* This parameter can be one of the following values:
* @arg I2C_Register_CR1: CR1 register.
* @arg I2C_Register_CR2: CR2 register.
* @arg I2C_Register_OAR1: OAR1 register.
* @arg I2C_Register_OAR2: OAR2 register.
* @arg I2C_Register_DR: DR register.
* @arg I2C_Register_SR1: SR1 register.
* @arg I2C_Register_SR2: SR2 register.
* @arg I2C_Register_CCR: CCR register.
* @arg I2C_Register_TRISE: TRISE register.
* @retval The value of the read register.
*/
uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register)
{
__IO uint32_t tmp = 0;
tmp = (uint32_t) I2Cx;
tmp += I2C_Register;
/* Return the selected register value */
return (*(__IO uint16_t *) tmp);
}
void I2C_GPIO(void )
{
GPIO_InitDef.GPIO_Pin = GPIO_Pin_9; // Set to Pin_9 (SCL0))
GPIO_InitDef.GPIO_Mode = GPIO_Mode_OUT; // Set to Mode Output
HAL_GPIO_Init(GPIOA, &GPIO_InitDef);
HAL_PAD_AFConfig(PAD_PA,GPIO_Pin_9, PAD_AF1); // PAD Config - LED used 2nd Function
GPIO_InitDef.GPIO_Pin = GPIO_Pin_10; // Set to Pin_9 (SCL0))
GPIO_InitDef.GPIO_Mode = GPIO_Mode_OUT; // Set to Mode Output
HAL_GPIO_Init(GPIOA, &GPIO_InitDef);
HAL_PAD_AFConfig(PAD_PA,GPIO_Pin_10, PAD_AF1); // PAD Config - LED used 2nd Function
}
void GPIO_I2C(void )
{
GPIO_InitDef.GPIO_Pin = GPIO_Pin_9; // Set to Pin_9 (SCL0))
GPIO_InitDef.GPIO_Mode = GPIO_Mode_OUT; // Set to Mode Output
HAL_GPIO_Init(GPIOA, &GPIO_InitDef);
HAL_PAD_AFConfig(PAD_PA,GPIO_Pin_9, PAD_AF0); // PAD Config - LED used 2nd Function
GPIO_InitDef.GPIO_Pin = GPIO_Pin_10; // Set to Pin_10 (SDA0))
GPIO_InitDef.GPIO_Mode = GPIO_Mode_IN; // Set to Mode Output
HAL_GPIO_Init(GPIOA, &GPIO_InitDef);
HAL_PAD_AFConfig(PAD_PA,GPIO_Pin_10, PAD_AF0); // PAD Config - LED used 2nd Functio
}
void WriteByte(uint8_t val)
uint8_t I2C_ReadByte(I2C_ConfigStruct* conf)
{
int i;
GPIO_TypeDef* GPIOx;
GPIOx = GPIOA;
uint8_t ret = 0;
for(i=0;i<8;i++)
I2C_WriteBitSDA(conf, 1); //out enable clear(GPIO is input)
//Read byte
for(i=0; i<8; i++)
{
if((val << i) & 0x80){
digitalWrite(GPIOx,SDA, Bit_SET);
}else{
digitalWrite(GPIOx,SDA, Bit_RESET);
I2C_WriteBitSCL(conf, 1);
ret = (ret << 1) | (I2C_ReadBitSDA(conf));
I2C_WriteBitSCL(conf, 0);
}
i2c_loop_us(1);
digitalWrite(GPIOx,SCL, Bit_SET);
i2c_loop_us(2);
digitalWrite(GPIOx,SCL, Bit_RESET);
}
digitalWrite(GPIOx,SDA, Bit_SET);
i2c_loop_us(1);
digitalWrite(GPIOx,SCL, Bit_SET);
i2c_loop_us(2);
digitalWrite(GPIOx,SCL, Bit_RESET);
return ret;
}
void digitalWrite(GPIO_TypeDef* GPIOx,uint16_t pin, uint16_t val)
int I2C_Write(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len)
{
int i;
if(val == Bit_SET)
I2C_Start(conf);
//Write addr
if(I2C_WriteByte(conf, addr) != 0)
{
GPIOx -> OUTENCLR = pin;
printf("Received NACK at address phase!!\r\n");
return -1;
}
//Write data
for(i=0; i<len; i++)
{
if(I2C_WriteByte(conf, data[i]))
return -1;
}
I2C_Stop(conf);
return 0;//success
}
int I2C_WriteRepeated(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len)
{
int i;
I2C_Start(conf);
//Write addr
if(I2C_WriteByte(conf, addr) != 0)
{
printf("Received NACK at address phase!!\r\n");
return -1;
}
//Write data
for(i=0; i<len; i++)
{
if(I2C_WriteByte(conf, data[i]))
return -1;
}
return 0;//success
}
int I2C_Read(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len)
{
int i;
I2C_Start(conf);
//Write addr | read command
if(I2C_WriteByte(conf, (addr | 1)) != 0)
{
printf("Received NACK at address phase!!\r\n");
return -1;
}
//Read data
for(i=0; i<len; i++)
{
data[i] = I2C_ReadByte(conf);
if( i == (len - 1) )
I2C_SendNACK(conf);
else
{
GPIOx -> OUTENSET |= pin;
I2C_SendACK(conf);
}
I2C_Stop(conf);
return 0;//success
}
void i2c_loop_us(int us)
int I2C_ReadRepeated(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len)
{
volatile uint32_t delay = us; // approximate loops per ms at 24 MHz, Debug config
for(; delay != 0; delay--)
__NOP();
}
void i2c_loop_ms(int count) {
i2c_loop_us(count*1000);
int i;
I2C_Start(conf);
//Write addr | read command
if(I2C_WriteByte(conf, (addr | 1)) != 0)
{
printf("Received NACK at address phase!!\r\n");
return -1;
}
//Read data
for(i=0; i<len; i++)
{
data[i] = I2C_ReadByte(conf);
if( i == (len - 1) )
I2C_SendNACK(conf);
else
I2C_SendACK(conf);
}
return 0;//success
}

221
libraries/mbed/targets/cmsis/TARGET_WIZNET/TARGET_W7500x/W7500x_i2c.h
View File

@ -27,210 +27,55 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
/*include -------------------------------------*/
#include "W7500x.h"
typedef enum
{
I2C_WRITE_SA7=0,
I2C_READ_SA7,
I2C_CTRWRITE_SA7,
I2C_CTRREAD_SA7,
} I2C_CTR;
typedef enum
{
I2C_ACKR=0,
I2C_ACKT,
I2C_OACKR,
I2C_SACKR,
I2C_BT,
} I2C_SR;
#ifndef __W7500X_I2C_H
#define __W7500X_I2C_H
typedef enum
{
INT_ACKR=-1,
INT_ACKT=-2,
INT_NACKR=-3,
INT_NACKT=-4,
INT_BT=-5,
} I2C_ERROR;
/**
*@
*/
/** @defgroup I2C_registers
* @{
*/
#define I2C_Register_PRER ((uint8_t)0x00)
#define I2C_Register_CTR ((uint8_t)0x04)
#define I2C_Register_CMDR ((uint8_t)0x08)
#define I2C_Register_SR ((uint8_t)0x0C)
#define I2C_Register_TSR ((uint8_t)0x10)
#define I2C_Register_SADDR ((uint8_t)0x14)
#define I2C_Register_TXR ((uint8_t)0x18)
#define I2C_Register_RXR ((uint8_t)0x1C)
#define I2C_Register_ISR ((uint8_t)0x20)
#define I2C_Register_ISCR ((uint8_t)0x24)
#define I2C_Register_ISMR ((uint8_t)0x28)
#define IS_I2C_REGISTER(REGISTER) (((REGISTER) == I2C_Register_PRER) || \
((REGISTER) == I2C_Register_CTR) || \
((REGISTER) == I2C_Register_CMDR) || \
((REGISTER) == I2C_Register_SR) || \
((REGISTER) == I2C_Register_TSR) || \
((REGISTER) == I2C_Register_SADDR) || \
((REGISTER) == I2C_Register_TXR) || \
((REGISTER) == I2C_Register_RXR) || \
((REGISTER) == I2C_Register_ISR)|| \
((REGISTER) == I2C_Register_ISCR)| \
((REGISTER) == I2C_Register_ISMR))
/** @defgroup I2C_Private_Defines
* @{
*/
/* I2C COREEN mask */
#define I2C_CTR_COREEN_DIS ((uint16_t)0xFF7F)
/* I2C INTEREN mask */
#define I2C_CTR_INTEREN_DIS ((uint16_t)0xFFBF)
/* I2C MODE(M/SN) mask */
#define I2C_CTR_MODE_SLAVE ((uint16_t)0xFFDF)
/* I2C ADDR10(10/7N) mask */
#define I2C_CTR_ADDR10_7BIT ((uint16_t)0xFFEF)
/* I2C CTRRWN(R/WN) mask */
#define I2C_CTR_CTRRWN_DIS ((uint16_t)0xFFF7)
/* I2C CTREN mask */
#define I2C_CTR_CTEN_DIS ((uint16_t)0xFFFB)
/* I2C START mask */
#define I2C_CMDR_START_DIS ((uint16_t)0xFF7F)
/* I2C STOP mask */
#define I2C_CMDR_STOP_DIS ((uint16_t)0xFFBF)
/* I2C ACK mask */
#define I2C_CMDR_ACK_NAK ((uint16_t)0xFFDF)
/* I2C RESTART mask */
#define I2C_CMDR_RESTA_DIS ((uint16_t)0xFFEF)
/* I2C INTERRUPT RESET mask */
#define I2C_ISCR_RST_DIS ((uint16_t)0xFFFE)
/**
* @}
*/
#define I2C_WRITE 0
#define I2C_READ 1
#define I2C_RWSEL(NewState) (((NewState) == I2C_WRITE)|| \
((NewState) == I2C_READ))
#define I2C_Ack_Enable (0x01ul << 5)
#define I2C_Ack_Disable (0x00ul << 5)
#define IS_I2C_ACK_NewState(NewState) (((NewState) == I2C_Ack_Enable) || \
((NewState) == I2C_Ack_Disable))
#define I2C_MASTER_MODE (0x01ul << 5 ) // 0x20
#define I2C_SLAVE_MODE (0x00ul << 5 ) // 0x20
#define IS_I2C_MODE(MODE) ((MODE) == I2C_MASTER_MODE)|| \
(MODE) == I2C_SLAVE_MODE))
#define I2C_CTR_MODE (0x01ul << 5 ) // 0x20
#define SLAVE_ADDR10 0x208
typedef enum
{
I2C_Master = I2C_MASTER_MODE,
I2C_Slave = I2C_SLAVE_MODE
}I2C_MODE;
typedef enum {
I2C_PA_5 = 0x05,
I2C_PA_6 = 0x06,
I2C_PA_9 = 0x09,
I2C_PA_10 = 0x0A,
I2C_PC_4 = 0x24,
I2C_PC_5 = 0x25,
I2C_PC_8 = 0x28,
// Not connected
I2C_NC = (int)0xFFFFFFFF
} I2C_PinName;
typedef struct
{
uint8_t prescale;
uint16_t timeout;
I2C_CTR control;
}I2C_MasterConfStruct;
typedef struct
{
uint32_t mode;
uint16_t slave_address; // only on slave mode
I2C_MasterConfStruct master;
I2C_PinName scl;
I2C_PinName sda;
}I2C_ConfigStruct;
/** @defgroup I2C_Exported_Functions
* @{
*/
#define I2C_PORT(X) (((uint32_t)(X) >> 4) & 0xF) // port number (0=A, 1=B, 2=C, 3=D)
#define I2C_PIN_INDEX(X) (1 << ((uint32_t)(X) & 0xF)) // pin index : flag bit
uint32_t I2C_Init (I2C_TypeDef* I2Cx, I2C_ConfigStruct conf);
void setFrequency (I2C_TypeDef* I2Cx, uint8_t prescale);
void I2C_DeInit (I2C_TypeDef* I2Cx);
uint32_t I2C_Init(I2C_ConfigStruct* conf);
ErrorStatus I2C_Start (I2C_TypeDef* I2Cx, uint16_t slave_address, I2C_CTR ctr);
void I2C_Stop (I2C_TypeDef* I2Cx);
void I2C_Reset (I2C_TypeDef* I2Cx);
void I2C_WriteBitSDA(I2C_ConfigStruct* conf, uint8_t data);
void I2C_WriteBitSCL(I2C_ConfigStruct* conf, uint8_t data);
uint8_t I2C_ReadBitSDA(I2C_ConfigStruct* conf);
void I2C_SendData (I2C_TypeDef* I2Cx,uint16_t Data);
int8_t I2C_SendDataAck (I2C_TypeDef* I2Cx,uint16_t Data);
int I2C_ReceiveData (I2C_TypeDef* I2Cx, int last);
void I2C_SendACK(I2C_ConfigStruct* conf);
void I2C_SendNACK(I2C_ConfigStruct* conf);
int I2C_Burst_Read (I2C_TypeDef* I2Cx, uint16_t address, uint8_t *data, int length, int stop);
int I2C_Burst_Write (I2C_TypeDef* I2Cx, uint16_t address, uint8_t *data, int length, int stop);
uint8_t I2C_WriteByte(I2C_ConfigStruct* conf, uint8_t data);
uint8_t I2C_ReadByte(I2C_ConfigStruct* conf);
void I2C_GenerateSTART (I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_GenerateSTOP (I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_Start(I2C_ConfigStruct* conf);
void I2C_Stop(I2C_ConfigStruct* conf);
void I2C_AcknowledgeConfig (I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_RESTART (I2C_TypeDef * I2Cx, FunctionalState NewState);
int I2C_Write(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len);
int I2C_WriteRepeated(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len);
int I2C_Read(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len);
int I2C_ReadRepeated(I2C_ConfigStruct* conf, uint8_t addr, uint8_t* data, uint32_t len);
void I2C_CoreEn (I2C_TypeDef* I2Cx,FunctionalState NewState);
void I2C_InterEn (I2C_TypeDef* I2Cx,FunctionalState NewState);
void I2C_MasterSlave(I2C_TypeDef* I2Cx,FunctionalState NewState);
void I2C_ControlRW (I2C_TypeDef* I2Cx,FunctionalState NewState);
void I2C_ControlEn (I2C_TypeDef* I2Cx,FunctionalState NewState);
void I2C_InterRst (I2C_TypeDef* I2Cx,FunctionalState NewState);
void I2C_Prescale (I2C_TypeDef* I2Cx,uint16_t Data);
void I2C_TimeoutSet (I2C_TypeDef* I2Cx,uint16_t Data);
void I2C_SetSlavAddress (I2C_TypeDef* I2Cx,uint16_t Data);
uint8_t I2C_StatusRead (I2C_TypeDef* I2Cx);
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx,I2C_SR sr);
void I2C_MasterInit (I2C_TypeDef * I2Cx,uint8_t Prescale,uint16_t Timeout,I2C_CTR Ctr);
void I2C_SlaveInit (I2C_TypeDef * I2Cx,FunctionalState NewState, uint16_t data);
void I2C_SendSlaveAddress (I2C_TypeDef* I2Cx, uint8_t SlaveAddress,I2C_CTR Ctr);
int8_t I2C_Restart_Structure(I2C_TypeDef * I2Cx,uint32_t SlaveAddress,I2C_CTR Ctr);
uint16_t I2C_ReadRegister (I2C_TypeDef* I2Cx, uint8_t I2C_Register);
void I2C_GPIO(void);
void GPIO_I2C(void );
void WriteByte(uint8_t val);
void digitalWrite(GPIO_TypeDef* GPIOx,uint16_t pin, uint16_t val);
uint16_t digitalRead(GPIO_TypeDef* GPIOx,uint16_t pin);
void i2c_loop_us(int us);
void i2c_loop_ms(int count) ;
/**
* @}
*/
#endif //__W7500X_I2C_H

6
libraries/mbed/targets/hal/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500/PeripheralPins.c
View File

@ -63,11 +63,17 @@ const PinMap PinMap_UART_RX[] = {
//*** I2C ***
const PinMap PinMap_I2C_SDA[] = {
{PA_10, I2C_0, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF0)},
{PC_9, I2C_0, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF2)},
{PC_5, I2C_1, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF0)},
{PA_6, I2C_1, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF2)},
{NC, NC, 0}
};
const PinMap PinMap_I2C_SCL[] = {
{PA_9, I2C_0, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF0)},
{PC_8, I2C_0, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF2)},
{PC_4, I2C_1, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF0)},
{PC_5, I2C_1, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF2)},
{NC, NC, 0}
};

4
libraries/mbed/targets/hal/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500/objects.h
View File

@ -81,7 +81,9 @@ struct spi_s {
};
struct i2c_s {
I2CName i2c;
I2CName I2Cx;
PinName sda;
PinName scl;
uint16_t ADDRESS;
uint16_t is_setAddress;
};

296
libraries/mbed/targets/hal/TARGET_WIZNET/TARGET_W7500x/i2c_api.c
View File

@ -47,303 +47,135 @@
#define FLAG_TIMEOUT ((int)0x1000)
#define LONG_TIMEOUT ((int)0xFFFF)
I2C_TypeDef * I2cHandle;
int i2c0_inited = 0;
int i2c1_inited = 0;
void i2c_init(i2c_t *obj, PinName sda, PinName scl)
{
// Determine the I2C to use
I2C_ConfigStruct conf;
//Determine the I2C to use
I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA);
I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL);
obj->I2Cx = (I2CName)pinmap_merge(i2c_sda, i2c_scl);
MBED_ASSERT(obj->I2Cx != (I2CName)NC);
obj->i2c = (I2CName)pinmap_merge(i2c_sda, i2c_scl);
MBED_ASSERT(obj->i2c != (I2CName)NC);
// Enable I2C1 clock and pinout if not done
if ((obj->i2c == I2C_0) && !i2c0_inited) {
i2c0_inited = 1;
// Configure I2C pins
pinmap_pinout(sda, PinMap_I2C_SDA);
pinmap_pinout(scl, PinMap_I2C_SCL);
pin_mode(sda, PullUp);
pin_mode(scl, PullUp);
}
// Enable I2C2 clock and pinout if not done
if ((obj->i2c == I2C_1) && !i2c1_inited) {
i2c1_inited = 1;
// Configure I2C pins
pinmap_pinout(sda, PinMap_I2C_SDA);
pinmap_pinout(scl, PinMap_I2C_SCL);
pin_mode(sda, PullUp);
pin_mode(scl, PullUp);
}
// Reset to clear pending flags if any
i2c_reset(obj);
// I2C configuration
i2c_frequency(obj, 100000); // 100 kHz per default
obj->sda = sda;
obj->scl = scl;
obj->ADDRESS = 0x0;
obj->is_setAddress = 0;
conf.sda = (I2C_PinName)obj->sda;
conf.scl = (I2C_PinName)obj->scl;
I2C_Init(&conf);
}
void i2c_frequency(i2c_t *obj, int hz)
{
//MBED_ASSERT((hz == 100000) || (hz == 400000) || (hz == 1000000));
MBED_ASSERT((hz == 100000));
I2cHandle = (I2C_TypeDef *)(obj->i2c);
// wait before init
I2C_ConfigStruct conf;
conf.mode = I2C_Master;
conf.master.timeout = LONG_TIMEOUT;
conf.master.prescale = 0x61; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
// Common settings: I2C clock = 48 MHz, Analog filter = ON, Digital filter coefficient = 0
// switch (hz) {
// case 100000:
// conf.master.prescale = 0x61; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
// break;
// case 400000:
// break;
// case 1000000:
// break;
// default:
// break;
// }
// I2C configuration
I2C_Init(I2cHandle, conf);
}
inline int i2c_start(i2c_t *obj)
{
obj->is_setAddress = 0;
I2C_ConfigStruct conf;
conf.sda = (I2C_PinName)obj->sda;
conf.scl = (I2C_PinName)obj->scl;
I2C_Start(&conf);
return 0;
}
inline int i2c_stop(i2c_t *obj)
{
I2cHandle = (I2C_TypeDef *)(obj->i2c);
I2C_ConfigStruct conf;
conf.sda = (I2C_PinName)obj->sda;
conf.scl = (I2C_PinName)obj->scl;
// Generate the STOP condition
I2C_Stop(I2cHandle);
I2C_Reset(I2cHandle);
obj->is_setAddress = 0;
I2C_Stop(&conf);
return 0;
}
int i2c_read(i2c_t *obj, int address, char *data, int length, int stop)
{
I2cHandle = (I2C_TypeDef *)(obj->i2c);
int count;
int value;
I2C_ConfigStruct conf;
if(!obj->is_setAddress)
{
if( I2C_Start(I2cHandle, address, I2C_READ_SA7) == ERROR )
conf.sda = (I2C_PinName)obj->sda;
conf.scl = (I2C_PinName)obj->scl;
if(stop)
{
if(I2C_Read(&conf, address, data, length) != 0)
return -1;
}
obj->is_setAddress = 1;
obj->ADDRESS = address;
}
else
{
I2C_Restart_Structure(I2cHandle, address, I2C_READ_SA7);
obj->ADDRESS = address;
if(I2C_ReadRepeated(&conf, address, data, length) != 0)
return -1;
}
// Read all bytes
for (count = 0; count < (length-1); count++) {
if( (value = i2c_byte_read(obj, 0)) == -1) {
return value;
}
data[count] = (char)value;
}
if(stop){
if( (value = i2c_byte_read(obj, 1)) == -1) {
return value;
}
data[count] = (char)value;
i2c_stop(obj);
obj->is_setAddress =1;
count++;
}
else{
if( (value = i2c_byte_read(obj, 0)) == -1) {
return value;
}
data[count] = (char)value;
count++;
}
return count;
return length;
}
int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop)
{
I2cHandle = (I2C_TypeDef *)(obj->i2c);
int count =0;
I2C_ConfigStruct conf;
if(!obj->is_setAddress)
{
if( I2C_Start(I2cHandle, address, I2C_WRITE_SA7) == ERROR )
conf.sda = (I2C_PinName)obj->sda;
conf.scl = (I2C_PinName)obj->scl;
if(stop)
{
if(I2C_Write(&conf, address, data, length) != 0)
return -1;
}
obj->is_setAddress = 1;
obj->ADDRESS = address;
}
else
{
I2C_Restart_Structure(I2cHandle, address, I2C_WRITE_SA7);
obj->ADDRESS = address;
if(I2C_WriteRepeated(&conf, address, data, length) != 0)
return -1;
}
for (count = 0; count < length; count++) {
i2c_byte_write(obj, data[count]);
wait_us(1);
}
if(length == 0x00)
{
I2C_GPIO();
i2c_byte_write(obj, 0xff);
GPIO_I2C();
}
// If not repeated start, send stop
if (stop) {
i2c_stop(obj);
}
else
{
i2c_reset(obj);
}
return count;
return length;
}
int i2c_byte_read(i2c_t *obj, int last)
{
I2cHandle = (I2C_TypeDef *)(obj->i2c);
uint8_t ret;
I2C_ConfigStruct conf;
return I2C_ReceiveData(I2cHandle, last);
conf.sda = (I2C_PinName)obj->sda;
conf.scl = (I2C_PinName)obj->scl;
ret = I2C_ReadByte(&conf);
if(last)
I2C_SendNACK(&conf);
else
I2C_SendACK(&conf);
return (int)ret;
}
int i2c_byte_write(i2c_t *obj, int data)
{
I2cHandle = (I2C_TypeDef *)(obj->i2c);
return I2C_SendDataAck(I2cHandle,(uint8_t)data);
I2C_ConfigStruct conf;
conf.sda = (I2C_PinName)obj->sda;
conf.scl = (I2C_PinName)obj->scl;
if(I2C_WriteByte(&conf, (uint8_t)data)) // NACK
return 0;
else //ack
return 1;
}
void i2c_reset(i2c_t *obj)
{
I2cHandle = (I2C_TypeDef *)(obj->i2c);
I2C_Reset(I2cHandle);
}
//#if DEVICE_I2CSLAVE
//
//void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask)
//{
// I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
// uint16_t tmpreg = 0;
//
// // disable
// i2c->OAR1 &= (uint32_t)(~I2C_OAR1_OA1EN);
// // Get the old register value
// tmpreg = i2c->OAR1;
// // Reset address bits
// tmpreg &= 0xFC00;
// // Set new address
// tmpreg |= (uint16_t)((uint16_t)address & (uint16_t)0x00FE); // 7-bits
// // Store the new register value
// i2c->OAR1 = tmpreg;
// // enable
// i2c->OAR1 |= I2C_OAR1_OA1EN;
//}
//
//void i2c_slave_mode(i2c_t *obj, int enable_slave)
//{
// I2C_TypeDef *i2c = (I2C_TypeDef *)(obj->i2c);
// uint16_t tmpreg;
//
// // Get the old register value
// tmpreg = i2c->OAR1;
//
// // Enable / disable slave
// if (enable_slave == 1) {
// tmpreg |= I2C_OAR1_OA1EN;
// } else {
// tmpreg &= (uint32_t)(~I2C_OAR1_OA1EN);
// }
//
// // Set new mode
// i2c->OAR1 = tmpreg;
//}
//
//// See I2CSlave.h
//#define NoData 0 // the slave has not been addressed
//#define ReadAddressed 1 // the master has requested a read from this slave (slave = transmitter)
//#define WriteGeneral 2 // the master is writing to all slave
//#define WriteAddressed 3 // the master is writing to this slave (slave = receiver)
//
//int i2c_slave_receive(i2c_t *obj)
//{
// I2cHandle.Instance = (I2C_TypeDef *)(obj->i2c);
// int retValue = NoData;
//
// if (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_BUSY) == 1) {
// if (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_ADDR) == 1) {
// if (__HAL_I2C_GET_FLAG(&I2cHandle, I2C_FLAG_DIR) == 1)
// retValue = ReadAddressed;
// else
// retValue = WriteAddressed;
//
// __HAL_I2C_CLEAR_FLAG(&I2cHandle, I2C_FLAG_ADDR);
// }
// }
//
// return (retValue);
//}
//
//int i2c_slave_read(i2c_t *obj, char *data, int length)
//{
// char size = 0;
//
// while (size < length) data[size++] = (char)i2c_byte_read(obj, 0);
//
// return size;
//}
//
//int i2c_slave_write(i2c_t *obj, const char *data, int length)
//{
// char size = 0;
// I2cHandle.Instance = (I2C_TypeDef *)(obj->i2c);
//
// do {
// i2c_byte_write(obj, data[size]);
// size++;
// } while (size < length);
//
// return size;
//}
//
//
//#endif // DEVICE_I2CSLAVE
#endif // DEVICE_I2C