Roy_01
79 lines
1.9 KiB
Markdown
79 lines
1.9 KiB
Markdown
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## I2C_master_transceiver
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> This example is used to transceive data with STM32 I2C-Master
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### steps
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> IIC master: `DUT` IIC slave: `STM32`
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1. `DUT` ==> `STM32`(Transmit data action)
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2. `STM32` save the data
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3. `DUT` ==> `STM32`(Receive data action)
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4. `STM32` send the saved data
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5. `DUT` save the read data
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6. `DUT` compare the Transmitted data with the Received data, if consistent, proceed to the next loop, and inconsistent, enter while(1) loop
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### Configuration
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+ select transmit mode
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```
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//in main.c
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/**
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* if defined, transfer data using interrupt mode
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* if not, transfer data using polling mode
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*/
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#define CONFIG_USE_I2C_INTERRUPT
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```
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+ Select IIC DIV Clock
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```
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//in main.c
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#define IIC_DIV_CLOCK I2C_CLK_Div60 // I2C clock division
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```
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+ Select IIC pin
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```
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//in main.c
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/**
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* Select I2C SCL and SDA pin
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*/
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#define IIC_SCL_PORT GPIOA
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#define IIC_SCL_PIN GPIO_Pin_00
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#define IIC_SCL_AF GPIO_AF_4
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#define IIC_SDA_PORT GPIOA
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#define IIC_SDA_PIN GPIO_Pin_01
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#define IIC_SDA_AF GPIO_AF_4
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```
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> SCL_PIN: `PA00` `PA01` `PB02` `PB01` `PB03` `PA15`
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>
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> SDA_PIN: `PA01` `PA00` `PB01` `PB02` `PB05` `PB00`
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---
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Note:
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+ Select UART log pin
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```
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// in syslog.c
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#define CONFIG_LOG_DEVICE_TX_IO_PORTx GPIOA
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#define CONFIG_LOG_DEVICE_TX_IO_PINx GPIO_Pin_15
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#define CONFIG_LOG_DEVICE_TX_IO_AF GPIO_AF_1
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```
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+ If you want to use `PB1` as an I2C pin, set IO to normal IO.(RST pin by default)
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```
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SYSCFG_SetRstPin2NormalIO(true); // set RST IO to normal IO
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```
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+ If you want to use `PB[2:5]` as an I2C pin, set IO to normal IO, and Restore IO to JTAG IO at the end.(JTAG pin by default)
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```
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SYSCFG_SetICEPin2NormalIO(true); // set JTAG IO to normal IO
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SYSCFG_SetICEPin2NormalIO(false); // set normal IO to JTAG IO
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```
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