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49 lines
1.7 KiB
49 lines
1.7 KiB
5 years ago
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#include <stm32f10x_i2c.h>
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void initI2C(I2C_TypeDef* i2cx , uint32_t speed, uint16_t own_address)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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I2C_InitTypeDef I2C_InitStructure;
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// Enable GPIOB clocks
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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// Configure I2C clock and GPIO
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GPIO_StructInit (& GPIO_InitStructure);
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if (i2cx == I2C1){
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// I2C1 clock enable
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RCC_APB1PeriphClockCmd (RCC_APB1Periph_I2C1 , ENABLE);
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// I2C1 SDA and SCL configuration
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 ;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz ;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD ;
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GPIO_Init(GPIOB, &GPIO_InitStructure );
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// I2C1 Reset
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);
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}
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else { // I2C2 ...
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}
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// I2C configuration
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I2C_StructInit(&I2C_InitStructure);
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I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
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I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
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I2C_InitStructure.I2C_OwnAddress1 = own_address;
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I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
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I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
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I2C_InitStructure.I2C_ClockSpeed = speed;
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I2C_Init(i2cx, &I2C_InitStructure);
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I2C_Cmd(i2cx, ENABLE);
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}
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//uint8_t pingI2C (I2C_TypeDef* i2cx, uint8_t SlaveAddress)
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//{
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// __IO uint32_t Timeout = 0;
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// Timed ( I2C_GetFlagStatus (I2Cx , I2C_FLAG_BUSY ));
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// // Intiate Start Sequence
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// I2C_GenerateSTART (I2Cx , ENABLE );
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// Timed (! I2C_CheckEvent (I2Cx , I2C_EVENT_MASTER_MODE_SELECT));
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// // Send Address EV5
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// I2C_Send7bitAddress (I2Cx , SlaveAddress, I2C_Direction_Transmitter);
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// Timed (! I2C_CheckEvent (I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
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// return 0;
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//}
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