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44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/*
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* Software_I2C.h
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*
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* Created on: 25 Jul 2020
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* Author: Ralim
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*/
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#ifndef BSP_MINIWARE_SOFTWARE_I2C_H_
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#define BSP_MINIWARE_SOFTWARE_I2C_H_
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#include "BSP.h"
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#include "configuration.h"
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#include "stm32f1xx_hal.h"
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#ifdef I2C_SOFT_BUS_2
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#define SOFT_SCL2_HIGH() HAL_GPIO_WritePin(SCL2_GPIO_Port, SCL2_Pin, GPIO_PIN_SET)
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#define SOFT_SCL2_LOW() HAL_GPIO_WritePin(SCL2_GPIO_Port, SCL2_Pin, GPIO_PIN_RESET)
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#define SOFT_SDA2_HIGH() HAL_GPIO_WritePin(SDA2_GPIO_Port, SDA2_Pin, GPIO_PIN_SET)
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#define SOFT_SDA2_LOW() HAL_GPIO_WritePin(SDA2_GPIO_Port, SDA2_Pin, GPIO_PIN_RESET)
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#define SOFT_SDA2_READ() (HAL_GPIO_ReadPin(SDA2_GPIO_Port, SDA2_Pin) == GPIO_PIN_SET ? 1 : 0)
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#define SOFT_SCL2_READ() (HAL_GPIO_ReadPin(SCL2_GPIO_Port, SCL2_Pin) == GPIO_PIN_SET ? 1 : 0)
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#endif
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#ifdef I2C_SOFT_BUS_1
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#define SOFT_SCL1_HIGH() HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, GPIO_PIN_SET)
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#define SOFT_SCL1_LOW() HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, GPIO_PIN_RESET)
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#define SOFT_SDA1_HIGH() HAL_GPIO_WritePin(SDA_GPIO_Port, SDA_Pin, GPIO_PIN_SET)
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#define SOFT_SDA1_LOW() HAL_GPIO_WritePin(SDA_GPIO_Port, SDA_Pin, GPIO_PIN_RESET)
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#define SOFT_SDA1_READ() (HAL_GPIO_ReadPin(SDA_GPIO_Port, SDA_Pin) == GPIO_PIN_SET ? 1 : 0)
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#define SOFT_SCL1_READ() (HAL_GPIO_ReadPin(SCL_GPIO_Port, SCL_Pin) == GPIO_PIN_SET ? 1 : 0)
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#endif
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#define SOFT_I2C_DELAY() \
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{ \
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for (int xx = 0; xx < 15; xx++) { \
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asm("nop"); \
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} \
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}
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// 40 ~= 100kHz; 15 gives around 250kHz or so which is fast _and_ stable
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#endif /* BSP_MINIWARE_SOFTWARE_I2C_H_ */
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