Diff: porting/ToF_I2C.h

Revision:

5:89031b2f5316

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/porting/ToF_I2C.h	Wed Jul 14 12:45:49 2021 +0100
@@ -0,0 +1,111 @@
+/* Define to prevent from recursive inclusion --------------------------------*/
+#ifndef __DEV_ToF_I2C_H
+#define __DEV_ToF_I2C_H
+
+/* Includes ------------------------------------------------------------------*/
+
+#include "mbed.h"
+
+#include "pinmap.h"
+
+static int mutex =0;
+
+//Class replacing DevI2C class as it was not implementing a 16bit address registers   
+class ToF_DevI2C : public I2C
+{
+public:
+    /** Create a DevI2C Master interface, connected to the specified pins
+     *
+     *  @param sda I2C data line pin
+     *  @param scl I2C clock line pin
+     */
+    ToF_DevI2C(PinName sda, PinName scl) : I2C(sda, scl) { printf ("ToF_DevI2C\n");}
+    
+    /**
+     * @brief  Writes a buffer towards the I2C peripheral device.
+     * @param  pBuffer pointer to the byte-array data to send
+     * @param  DeviceAddr specifies the peripheral device slave address.
+     * @param  RegisterAddr specifies the internal address register
+     *         where to start writing to (must be correctly masked).
+     * @param  NumByteToWrite number of bytes to be written.
+     * @retval 0 if ok,
+     * @retval -1 if an I2C error has occured, or
+     * @retval -2 on temporary buffer overflow (i.e. NumByteToWrite was too high)
+     * @note   On some devices if NumByteToWrite is greater
+     *         than one, the RegisterAddr must be masked correctly!
+     */
+    
+        int ToF_i2c_write(uint8_t* pBuffer, uint8_t DeviceAddr, uint16_t RegisterAddr,
+                  uint16_t NumByteToWrite) {
+        int ret;
+        uint8_t tmp[TEMP_BUF_SIZE];
+
+        if(NumByteToWrite >= TEMP_BUF_SIZE) return -2;
+
+        // First, send device address. Then, send data and STOP condition 
+        tmp[0] = RegisterAddr >> 8;
+        tmp[1] = RegisterAddr & 0x0FF;
+        memcpy(tmp+2, pBuffer, NumByteToWrite);
+
+        ret = write(DeviceAddr, (const char*)tmp, NumByteToWrite+2, false);
+
+        if(ret) return -1;
+        return 0;
+    }
+
+    /**
+     * @brief  Reads a buffer from the I2C peripheral device.
+     * @param  pBuffer pointer to the byte-array to read data in to
+     * @param  DeviceAddr specifies the peripheral device slave address.
+     * @param  RegisterAddr specifies the internal address register
+     *         where to start reading from (must be correctly masked).
+     * @param  NumByteToRead number of bytes to be read.
+     * @retval 0 if ok,
+     * @retval -1 if an I2C error has occured
+     * @note   On some devices if NumByteToWrite is greater
+     *         than one, the RegisterAddr must be masked correctly!
+     */
+    int ToF_i2c_read(uint8_t* pBuffer, uint8_t DeviceAddr, uint16_t RegisterAddr,
+                 uint16_t NumByteToRead) {
+        int ret;
+        uint8_t ExpanderData[2];
+        ExpanderData[0] = RegisterAddr >> 8;
+        ExpanderData[1] = RegisterAddr & 0x0FF;
+        /* Send device address, with no STOP condition */
+        ret = write(DeviceAddr, (const char*)ExpanderData, 2, true);
+        if(!ret) {
+            /* Read data, with STOP condition  */
+            ret = read(DeviceAddr, (char*)pBuffer, NumByteToRead, false);
+        }
+		else
+		{
+			printf("ToF_i2c_read write failed %d %d %d %d\n",ret,DeviceAddr,RegisterAddr,NumByteToRead);
+		}
+
+        if(ret) return -1;
+        return 0;
+    }
+	
+	
+	int ToF_i2c_write_direct(uint8_t* pBuffer, uint16_t DeviceAddr,
+                  uint16_t NumByteToWrite) {
+        int ret;
+        uint8_t tmp[TEMP_BUF_SIZE];
+
+        if(NumByteToWrite >= TEMP_BUF_SIZE) return -2;
+
+        // First, send device address. Then, send data and STOP condition 
+
+        memcpy(tmp, pBuffer, NumByteToWrite);
+
+        ret = write(DeviceAddr, (const char*)tmp, NumByteToWrite, false);
+//printf("ToF_i2c_write_direct %d %d %d %d %d %d\n",DeviceAddr,tmp[0],(uint8_t)tmp[1],(uint8_t)tmp[2],NumByteToWrite,ret);
+        if(ret) return -1;
+        return 0;
+    }
+
+private:
+    static const unsigned int TEMP_BUF_SIZE = 256;
+};
+
+#endif /* __DEV_53L1X_I2C_H */
\ No newline at end of file