moved device drivers to a seperate folder + added spi stuff (not jet fully implemented!)

ked/csl/interfaces/spi.h

@@ -0,0 +1,45 @@
+/**
+**************************************************************************************************
+* @file		spi.h
+* @author	Kerem Yollu & Edwin Koch
+* @date		12.03.2022
+* @version	1.0
+************************************************************************************************** 
+* @brief	This is the genral interface for spi.
+* 
+* **Detailed Description :**
+* This the spi interface and belongs to the interface layer.
+*
+**************************************************************************************************
+*/
+
+#ifndef _SPI_H_
+#define  _SPI_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include "hardwareDescription.h"
+
+/** This is the spi hardware channel class*/
+
+void spi_initMaster(spiCH_t spic_hw_ch);
+
+
+/*!
+ * @brief Transmits and receives on byte of data
+ * @param spi_hw_ch SPI hardware channel
+ * @param tx_data 'tx_data' The pyte to be transmitted"
+ * @return The received data
+ */
+uint8_t spi_trx(spiCH_t spi_hw_ch, uint8_t tx_data);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _SPI_H_
+

ked/csl/interfaces/spi_ch.h

@@ -0,0 +1,82 @@
+
+
+#ifndef _SPI_CH_H
+#define _SPI_CH_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "pin.h"
+#include "spi.h"
+#include <stdint.h>
+
+// https://stackoverflow.com/questions/17052443/c-function-inside-struct
+typedef uint8_t (*readReg_t) (uint8_t); 
+
+
+/*! \brief SPI cannel class
+ * This class cpntains the pin and spi channel number 
+ * select.
+ * */
+typedef struct{
+	pinNo_t pin,	/*!< pin number */	
+	spiCH_t spi		/*!< spi hardware channel number */
+}spi_ch_t;
+
+/**
+ * \brief Read register
+ * Read one byte from a one register with one byte address.
+ * \param *spi_ch spi pointer to spi channel object
+ * \param reg_address register address
+ * \return register content
+ */
+uint8_t spiCH_readReg(spi_ch_t *spi_ch,
+					  uint8_t reg_address);
+
+/**
+ * \brief Read Block
+ * Read a block of data starting at a given start address.
+ * This function makes use of the auto register increment of the device to be read from. 
+ * The address will be sent once and then data is read.
+ * \param *spi_ch pointer to spi cannel object
+ * \param start_address start address to the first register
+ * \param *buffer pointer to the buffer in which the read content is written into
+ * \param buf_len length of buffer
+ */
+void spiCH_autoReadBlock(spi_ch_t *spi_ch,
+						 uint8_t start_address,
+						 uint8_t* buffer,
+						 uint8_t buf_len);
+
+/**
+ * \brief Write register
+ * Write one byte to one register with one byte address.
+ * \param *spi_ch pointer to spi channel object
+ * \param reg_address register address
+ * \param data data byte to be written into register
+ *
+ */
+void spiCH_writeReg(spi_ch_t *spi_ch,
+					uint8_t reg_address,
+					uint8_t data);	
+/**
+ * \brief  Write data  block
+ * Write a block of data starting at a given start address.
+ * This function makes use of the auto register increment of the device to be written to. The
+ * address will be sent once an then data is written.
+ * \param *spi_ch pointer to spi channel object
+ * \param start_address start address of the first reister
+ * \param *data pointer to data to be written
+ * \param data_len length of data to be written
+ */
+void spiCH_writeBlock(spi_ch_t *spi_ch,
+					  uint8_t start_address,
+					  const uint8_t *data,
+					  uint8_t data_len);
+#ifdef __cplusplus
+}
+#endif
+
+#endif //_SPI_CH_H
+

ked/drivers/spi_ch.c

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+#include "spi_ch.h"
+
+// generic implementation of spi channel class
+
+
+uint8_t spiCH_readReg(spi_ch_t *spi_ch,
+					  uint8_t reg_address) {
+	uitn8_t buf;
+	
+	// select target device
+	pinWrite(spi_ch->pin,0);
+	
+	// send address of target register
+	spi_trx(spi_ch->spi, reg_address);
+
+	// read from target register
+	buf = spi_trx(spi->spi,0x00);
+
+	// release target device
+	pinWrite(spi_ch->pin,1);
+
+	return buf;
+}
+
+void spiCH_autoReadBlock(spi_ch_t *spi_ch,
+						 uint8_t start_address,
+						 uint8_t* buffer,
+						 uint8_t buf_len) {
+	uint8_t i = 0;
+
+	// select target device
+	pinWrite(spi_ch->pin,0);
+	
+	// send address of starting register
+	spi_trx(spi_ch->spi, reg_address);
+
+	// read block from device
+	for(;i < buf_len;i++) {
+		buffer[i] = spi_trx(spi_ch->spi, 0x00);
+	}
+
+	// release target device
+	pinWrite(spi_ch->pin,1);
+}
+
+void spiCH_writeReg(spi_ch_t *spi_ch,
+					uint8_t reg_address,
+					uint8_t data) {
+	// select target device
+	pinWrite(spi_ch->pin,0);
+	
+	// send address of target register
+	spi_trx(spi_ch->spi, reg_address);
+
+	// write to target register
+	spi_trx(spi->spi, data);
+
+	// release target device
+	pinWrite(spi_ch->pin,1);
+}
+
+void spiCH_writeBlock(spi_ch_t *spi_ch,
+					  uint8_t start_address,
+					  const uint8_t *data,
+					  uint8_t data_len) {
+	uint8_t i = 0;
+
+	// select target device
+	pinWrite(spi_ch->pin,0);
+	
+	// send address of starting register
+	spi_trx(spi_ch->spi, reg_address);
+
+	// read block from device
+	for(;i < buf_len;i++) {
+		spi_trx(spi_ch->spi, data[i]);
+	}
+
+	// release target device
+	pinWrite(spi_ch->pin,1);
+}
+