59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
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/*
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* pcf8574.c
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*
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* Created on: Dec 30, 2014
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* Author: peter
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*/
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#include "pcf8574.h"
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PCF8574_RESULT PCF8574_Init(PCF8574_HandleTypeDef* handle) {
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handle->PCF_I2C_ADDRESS &= 0x07;
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/*if (handle->i2c.State == HAL_I2C_STATE_RESET) {
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handle->i2c.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
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handle->i2c.Init.DualAddressMode = I2C_DUALADDRESS_DISABLED;
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handle->i2c.Init.DutyCycle = I2C_DUTYCYCLE_2;
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handle->i2c.Init.NoStretchMode = I2C_NOSTRETCH_DISABLED;
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handle->i2c.Init.OwnAddress1 = 0xFE;
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if (HAL_I2C_Init(&handle->i2c) != HAL_OK) {
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handle->errorCallback(PCF8574_ERROR);
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return PCF8574_ERROR;
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}
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}*/
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return PCF8574_OK;
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}
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PCF8574_RESULT PCF8574_DeInit(PCF8574_HandleTypeDef* handle) {
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HAL_I2C_DeInit(&handle->i2c);
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return PCF8574_OK;
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}
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PCF8574_RESULT PCF8574_Write(PCF8574_HandleTypeDef* handle, uint8_t val) {
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if (HAL_I2C_Master_Transmit(&handle->i2c,
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(handle->PCF_I2C_ADDRESS << 1) | PCF8574_I2C_ADDRESS_MASK, &val, 1,
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handle->PCF_I2C_TIMEOUT) != HAL_OK) {
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//handle->errorCallback(PCF8574_ERROR);
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return PCF8574_ERROR;
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}
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/*if (HAL_I2C_Master_Transmit_DMA(&handle->i2c,
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(handle->PCF_I2C_ADDRESS << 1) | PCF8574_I2C_ADDRESS_MASK, &val, 1) != HAL_OK) {
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handle->errorCallback(PCF8574_ERROR);
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//<return PCF8574_ERROR;
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}*/
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//HAL_I2C_Master_Transmit_DMA(&hi2c2, 0xA4, (uint8_t*)ai2cBuffer, 2);
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return PCF8574_OK;
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}
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PCF8574_RESULT PCF8574_Read(PCF8574_HandleTypeDef* handle, uint8_t* val) {
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if (HAL_I2C_Master_Receive(&handle->i2c,
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(handle->PCF_I2C_ADDRESS << 1) | PCF8574_I2C_ADDRESS_MASK, val, 1,
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handle->PCF_I2C_TIMEOUT) != HAL_OK) {
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return PCF8574_ERROR;
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}
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return PCF8574_OK;
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}
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