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/******************************************************************************************************************************************
* �ļ�����: SWM320_i2c.c
* ����˵��: SWM320��Ƭ����I2C���нӿڹ���������
* ����֧��: http://www.synwit.com.cn/e/tool/gbook/?bid=1
* ע������:
* �汾����: V1.1.0 2017��10��25��
* ������¼:
*
*
*******************************************************************************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIES AT PROVIDING CUSTOMERS WITH CODING INFORMATION
* REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIEE. AS A RESULT, SYNWIT SHALL NOT BE HELD LIABLE
* FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIES ARISING FROM THE CONTENT
* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONN-
* -ECTION WITH THEIR PRODUCTS.
*
* COPYRIGHT 2012 Synwit Technology
*******************************************************************************************************************************************/
#include "SWM320.h"
#include "SWM320_i2c.h"
/******************************************************************************************************************************************
* ��������: I2C_Init()
* ����˵��: I2C��ʼ��
* �� ��: I2C_TypeDef * I2Cx ָ��Ҫ�����õ�I2C����Чֵ����I2C0��I2C1
* I2C_InitStructure * initStruct ����I2C����趨ֵ�Ľṹ��
* �� ��: ��
* ע������: ģ��ֻ�ܹ���������ģʽ
******************************************************************************************************************************************/
void I2C_Init(I2C_TypeDef *I2Cx, I2C_InitStructure *initStruct)
{
switch ((uint32_t)I2Cx)
{
case ((uint32_t)I2C0):
SYS->CLKEN |= (0x01 << SYS_CLKEN_I2C0_Pos);
break;
case ((uint32_t)I2C1):
SYS->CLKEN |= (0x01 << SYS_CLKEN_I2C1_Pos);
break;
}
I2C_Close(I2Cx); //һЩ�ؼ��Ĵ���ֻ����I2C�ر�ʱ����
if (initStruct->Master == 1)
{
I2Cx->CLKDIV = SystemCoreClock / 5 / initStruct->MstClk;
I2Cx->MSTCMD = (I2Cx->MSTCMD & (~I2C_MSTCMD_IF_Msk)) | (1 << I2C_MSTCMD_IF_Pos); //ʹ���ж�֮ǰ������жϱ�־
I2Cx->CTRL &= ~I2C_CTRL_MSTIE_Msk;
I2Cx->CTRL |= (initStruct->MstIEn << I2C_CTRL_MSTIE_Pos);
switch ((uint32_t)I2Cx)
{
case ((uint32_t)I2C0):
if (initStruct->MstIEn)
{
NVIC_EnableIRQ(I2C0_IRQn);
}
else
{
NVIC_DisableIRQ(I2C0_IRQn);
}
break;
case ((uint32_t)I2C1):
if (initStruct->MstIEn)
{
NVIC_EnableIRQ(I2C1_IRQn);
}
else
{
NVIC_DisableIRQ(I2C1_IRQn);
}
break;
}
}
else
{
I2Cx->SLVCR |= (1 << I2C_SLVCR_SLAVE_Pos);
I2Cx->SLVCR &= ~(I2C_SLVCR_ADDR7b_Msk | I2C_SLVCR_ADDR_Msk);
I2Cx->SLVCR |= (1 << I2C_SLVCR_ACK_Pos) |
(initStruct->Addr7b << I2C_SLVCR_ADDR7b_Pos) |
(initStruct->SlvAddr << I2C_SLVCR_ADDR_Pos);
I2Cx->SLVIF = I2C_SLVIF_RXEND_Msk | I2C_SLVIF_TXEND_Msk | I2C_SLVIF_STADET_Msk | I2C_SLVIF_STODET_Msk; //���жϱ�־
I2Cx->SLVCR &= ~(I2C_SLVCR_IM_RXEND_Msk | I2C_SLVCR_IM_TXEND_Msk | I2C_SLVCR_IM_STADET_Msk | I2C_SLVCR_IM_STODET_Msk |
I2C_SLVCR_IM_RDREQ_Msk | I2C_SLVCR_IM_WRREQ_Msk);
I2Cx->SLVCR |= ((initStruct->SlvRxEndIEn ? 0 : 1) << I2C_SLVCR_IM_RXEND_Pos) |
((initStruct->SlvTxEndIEn ? 0 : 1) << I2C_SLVCR_IM_TXEND_Pos) |
((initStruct->SlvSTADetIEn ? 0 : 1) << I2C_SLVCR_IM_STADET_Pos) |
((initStruct->SlvSTODetIEn ? 0 : 1) << I2C_SLVCR_IM_STODET_Pos) |
((initStruct->SlvRdReqIEn ? 0 : 1) << I2C_SLVCR_IM_RDREQ_Pos) |
((initStruct->SlvWrReqIEn ? 0 : 1) << I2C_SLVCR_IM_WRREQ_Pos);
switch ((uint32_t)I2Cx)
{
case ((uint32_t)I2C0):
if (initStruct->SlvRxEndIEn | initStruct->SlvTxEndIEn | initStruct->SlvSTADetIEn |
initStruct->SlvSTODetIEn | initStruct->SlvRdReqIEn | initStruct->SlvWrReqIEn)
{
NVIC_EnableIRQ(I2C0_IRQn);
}
else
{
NVIC_DisableIRQ(I2C0_IRQn);
}
break;
case ((uint32_t)I2C1):
if (initStruct->SlvRxEndIEn | initStruct->SlvTxEndIEn | initStruct->SlvSTADetIEn |
initStruct->SlvSTODetIEn | initStruct->SlvRdReqIEn | initStruct->SlvWrReqIEn)
{
NVIC_EnableIRQ(I2C1_IRQn);
}
else
{
NVIC_DisableIRQ(I2C1_IRQn);
}
break;
}
}
}
/******************************************************************************************************************************************
* ��������: I2C_Open()
* ����˵��: I2C�������շ�
* �� ��: I2C_TypeDef * I2Cx ָ��Ҫ�����õ�I2C����Чֵ����I2C0��I2C1
* �� ��: ��
* ע������: ��
******************************************************************************************************************************************/
void I2C_Open(I2C_TypeDef *I2Cx)
{
I2Cx->CTRL |= (0x01 << I2C_CTRL_EN_Pos);
}
/******************************************************************************************************************************************
* ��������: I2C_Close()
* ����˵��: I2C�رգ���ֹ�շ�
* �� ��: I2C_TypeDef * I2Cx ָ��Ҫ�����õ�I2C����Чֵ����I2C0��I2C1
* �� ��: ��
* ע������: ��
******************************************************************************************************************************************/
void I2C_Close(I2C_TypeDef *I2Cx)
{
I2Cx->CTRL &= ~I2C_CTRL_EN_Msk;
}
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