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https://gitee.com/Lyon1998/pikapython.git
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216 lines
8.0 KiB
C
216 lines
8.0 KiB
C
/******************************************************************************************************************************************
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* <20>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>: SWM320_i2c.c
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: SWM320<32><30>Ƭ<EFBFBD><C6AC><EFBFBD><EFBFBD>I2C<32><43><EFBFBD>нӿڹ<D3BF><DAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* <20><><EFBFBD><EFBFBD>֧<EFBFBD><D6A7>: http://www.synwit.com.cn/e/tool/gbook/?bid=1
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
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* <20>汾<EFBFBD><E6B1BE><EFBFBD><EFBFBD>: V1.1.0 2017<31><37>10<31><30>25<32><35>
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼:
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*
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*
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*******************************************************************************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIES AT PROVIDING CUSTOMERS WITH CODING INFORMATION
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* REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIEE. AS A RESULT, SYNWIT SHALL NOT BE HELD LIABLE
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* FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIES ARISING FROM THE CONTENT
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* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONN-
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* -ECTION WITH THEIR PRODUCTS.
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*
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* COPYRIGHT 2012 Synwit Technology
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*******************************************************************************************************************************************/
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#include "SWM320.h"
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#include "SWM320_i2c.h"
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/******************************************************************************************************************************************
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Init()
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: I2C<32><43>ʼ<EFBFBD><CABC>
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* <20><> <20><>: I2C_TypeDef * I2Cx ָ<><D6B8>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>Чֵ<D0A7><D6B5><EFBFBD><EFBFBD>I2C0<43><30>I2C1
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* I2C_InitStructure * initStruct <09><><EFBFBD><EFBFBD>I2C<32><43><EFBFBD><EFBFBD><EFBFBD>趨ֵ<E8B6A8>Ľṹ<C4BD><E1B9B9>
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* <20><> <20><>: <20><>
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: ģ<><C4A3>ֻ<EFBFBD>ܹ<EFBFBD><DCB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
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******************************************************************************************************************************************/
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void I2C_Init(I2C_TypeDef * I2Cx, I2C_InitStructure * initStruct)
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{
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switch((uint32_t)I2Cx)
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{
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case ((uint32_t)I2C0):
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SYS->CLKEN |= (0x01 << SYS_CLKEN_I2C0_Pos);
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break;
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case ((uint32_t)I2C1):
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SYS->CLKEN |= (0x01 << SYS_CLKEN_I2C1_Pos);
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break;
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}
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I2C_Close(I2Cx); //һЩ<D2BB>ؼ<EFBFBD><D8BC>Ĵ<EFBFBD><C4B4><EFBFBD>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD>I2C<32>ر<EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>
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if(initStruct->Master == 1)
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{
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I2Cx->CLKDIV = SystemCoreClock/5/initStruct->MstClk;
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I2Cx->MSTCMD = (I2Cx->MSTCMD & (~I2C_MSTCMD_IF_Msk)) | (1 << I2C_MSTCMD_IF_Pos); //ʹ<><CAB9><EFBFBD>ж<EFBFBD>֮ǰ<D6AE><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϱ<D0B6>־
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I2Cx->CTRL &= ~I2C_CTRL_MSTIE_Msk;
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I2Cx->CTRL |= (initStruct->MstIEn << I2C_CTRL_MSTIE_Pos);
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switch((uint32_t)I2Cx)
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{
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case ((uint32_t)I2C0):
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if(initStruct->MstIEn)
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{
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NVIC_EnableIRQ(I2C0_IRQn);
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}
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else
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{
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NVIC_DisableIRQ(I2C0_IRQn);
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}
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break;
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case ((uint32_t)I2C1):
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if(initStruct->MstIEn)
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{
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NVIC_EnableIRQ(I2C1_IRQn);
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}
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else
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{
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NVIC_DisableIRQ(I2C1_IRQn);
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}
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break;
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}
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}
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else
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{
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I2Cx->SLVCR |= (1 << I2C_SLVCR_SLAVE_Pos);
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I2Cx->SLVCR &= ~(I2C_SLVCR_ADDR7b_Msk | I2C_SLVCR_ADDR_Msk);
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I2Cx->SLVCR |= (1 << I2C_SLVCR_ACK_Pos) |
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(initStruct->Addr7b << I2C_SLVCR_ADDR7b_Pos) |
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(initStruct->SlvAddr << I2C_SLVCR_ADDR_Pos);
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I2Cx->SLVIF = I2C_SLVIF_RXEND_Msk | I2C_SLVIF_TXEND_Msk | I2C_SLVIF_STADET_Msk | I2C_SLVIF_STODET_Msk; //<2F><><EFBFBD>жϱ<D0B6>־
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I2Cx->SLVCR &= ~(I2C_SLVCR_IM_RXEND_Msk | I2C_SLVCR_IM_TXEND_Msk | I2C_SLVCR_IM_STADET_Msk | I2C_SLVCR_IM_STODET_Msk |
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I2C_SLVCR_IM_RDREQ_Msk | I2C_SLVCR_IM_WRREQ_Msk);
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I2Cx->SLVCR |= ((initStruct->SlvRxEndIEn ? 0 : 1) << I2C_SLVCR_IM_RXEND_Pos) |
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((initStruct->SlvTxEndIEn ? 0 : 1) << I2C_SLVCR_IM_TXEND_Pos) |
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((initStruct->SlvSTADetIEn ? 0 : 1) << I2C_SLVCR_IM_STADET_Pos) |
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((initStruct->SlvSTODetIEn ? 0 : 1) << I2C_SLVCR_IM_STODET_Pos) |
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((initStruct->SlvRdReqIEn ? 0 : 1) << I2C_SLVCR_IM_RDREQ_Pos) |
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((initStruct->SlvWrReqIEn ? 0 : 1) << I2C_SLVCR_IM_WRREQ_Pos);
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switch((uint32_t)I2Cx)
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{
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case ((uint32_t)I2C0):
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if(initStruct->SlvRxEndIEn | initStruct->SlvTxEndIEn | initStruct->SlvSTADetIEn |
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initStruct->SlvSTODetIEn | initStruct->SlvRdReqIEn | initStruct->SlvWrReqIEn)
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{
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NVIC_EnableIRQ(I2C0_IRQn);
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}
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else
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{
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NVIC_DisableIRQ(I2C0_IRQn);
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}
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break;
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case ((uint32_t)I2C1):
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if(initStruct->SlvRxEndIEn | initStruct->SlvTxEndIEn | initStruct->SlvSTADetIEn |
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initStruct->SlvSTODetIEn | initStruct->SlvRdReqIEn | initStruct->SlvWrReqIEn)
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{
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NVIC_EnableIRQ(I2C1_IRQn);
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}
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else
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{
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NVIC_DisableIRQ(I2C1_IRQn);
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}
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break;
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}
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}
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}
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/******************************************************************************************************************************************
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Open()
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: I2C<32><EFBFBD><F2BFAAA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>շ<EFBFBD>
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* <20><> <20><>: I2C_TypeDef * I2Cx ָ<><D6B8>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>Чֵ<D0A7><D6B5><EFBFBD><EFBFBD>I2C0<43><30>I2C1
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* <20><> <20><>: <20><>
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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******************************************************************************************************************************************/
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void I2C_Open(I2C_TypeDef * I2Cx)
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{
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I2Cx->CTRL |= (0x01 << I2C_CTRL_EN_Pos);
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}
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/******************************************************************************************************************************************
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Close()
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: I2C<32>رգ<D8B1><D5A3><EFBFBD>ֹ<EFBFBD>շ<EFBFBD>
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* <20><> <20><>: I2C_TypeDef * I2Cx ָ<><D6B8>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>Чֵ<D0A7><D6B5><EFBFBD><EFBFBD>I2C0<43><30>I2C1
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* <20><> <20><>: <20><>
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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******************************************************************************************************************************************/
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void I2C_Close(I2C_TypeDef * I2Cx)
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{
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I2Cx->CTRL &= ~I2C_CTRL_EN_Msk;
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}
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/******************************************************************************************************************************************
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Start()
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: <09><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD>źŲ<C5BA><C5B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><E8B1B8>ַ
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* <20><> <20><>: I2C_TypeDef * I2Cx ָ<><D6B8>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>Чֵ<D0A7><D6B5><EFBFBD><EFBFBD>I2C0<43><30>I2C1
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* uint8_t addr <09>豸<EFBFBD><E8B1B8>ַ
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* <20><> <20><>: uint8_t 1 <20><><EFBFBD>յ<EFBFBD>ACK 0 <20><><EFBFBD>յ<EFBFBD>NACK
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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******************************************************************************************************************************************/
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uint8_t I2C_Start(I2C_TypeDef * I2Cx, uint8_t addr)
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{
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I2Cx->MSTDAT = addr;
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I2Cx->MSTCMD = (1 << I2C_MSTCMD_STA_Pos) |
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(1 << I2C_MSTCMD_WR_Pos); //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼλ<CABC>ʹӻ<CDB4><D3BB><EFBFBD>ַ
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while(I2Cx->MSTCMD & I2C_MSTCMD_TIP_Msk) __NOP(); //<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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return (I2Cx->MSTCMD & I2C_MSTCMD_RXACK_Msk) ? 0 : 1;
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}
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/******************************************************************************************************************************************
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Stop()
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: <09><><EFBFBD><EFBFBD>ֹͣ<CDA3>ź<EFBFBD>
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* <20><> <20><>: I2C_TypeDef * I2Cx ָ<><D6B8>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>Чֵ<D0A7><D6B5><EFBFBD><EFBFBD>I2C0<43><30>I2C1
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* <20><> <20><>: <20><>
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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******************************************************************************************************************************************/
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void I2C_Stop(I2C_TypeDef * I2Cx)
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{
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I2Cx->MSTCMD = (1 << I2C_MSTCMD_STO_Pos);
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while(I2Cx->MSTCMD & I2C_MSTCMD_TIP_Msk) __NOP(); //<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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}
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/******************************************************************************************************************************************
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Write()
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: д<><D0B4>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* <20><> <20><>: I2C_TypeDef * I2Cx ָ<><D6B8>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>Чֵ<D0A7><D6B5><EFBFBD><EFBFBD>I2C0<43><30>I2C1
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* uint8_t data Ҫд<D2AA><D0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* <20><> <20><>: uint8_t 1 <20><><EFBFBD>յ<EFBFBD>ACK 0 <20><><EFBFBD>յ<EFBFBD>NACK
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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******************************************************************************************************************************************/
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uint8_t I2C_Write(I2C_TypeDef * I2Cx, uint8_t data)
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{
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I2Cx->MSTDAT = data;
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I2Cx->MSTCMD = (1 << I2C_MSTCMD_WR_Pos);
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while(I2Cx->MSTCMD & I2C_MSTCMD_TIP_Msk) __NOP(); //<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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return (I2Cx->MSTCMD & I2C_MSTCMD_RXACK_Msk) ? 0 : 1;
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}
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/******************************************************************************************************************************************
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* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Read()
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* <20><><EFBFBD><EFBFBD>˵<EFBFBD><CBB5>: <09><>ȡһ<C8A1><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* <20><> <20><>: I2C_TypeDef * I2Cx ָ<><D6B8>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>Чֵ<D0A7><D6B5><EFBFBD><EFBFBD>I2C0<43><30>I2C1
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* uint8_t ack 1 <20><><EFBFBD><EFBFBD>ACK 0 <20><><EFBFBD><EFBFBD>NACK
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* <20><> <20><>: uint8_t <09><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <20><>
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******************************************************************************************************************************************/
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uint8_t I2C_Read(I2C_TypeDef * I2Cx, uint8_t ack)
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{
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I2Cx->MSTCMD = (1 << I2C_MSTCMD_RD_Pos) |
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((ack ? 0 : 1) << I2C_MSTCMD_ACK_Pos);
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while(I2Cx->MSTCMD & I2C_MSTCMD_TIP_Msk) __NOP(); //<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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return I2Cx->MSTDAT;
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}
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