Diff: SourceFiles/RSEDP_AM_MAX1X3X_ADC.cpp

Revision:

0:5b7639d1f2c4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SourceFiles/RSEDP_AM_MAX1X3X_ADC.cpp	Fri Nov 19 09:49:16 2010 +0000
@@ -0,0 +1,131 @@
+/* Driver for the MAX1x3x Serial ADC */
+/* ********************************* */
+
+/* Version 2.00 */
+/* Last Ammend Date: 23/6/09 */
+
+
+#define _MAX1038_
+
+
+
+/* Include Files Here */
+#include "mbed.h"                                /* mbed header file */
+#include "misra_types.h"                         /* MISRA Types header file */
+#include "defines.h"
+#include "RSEDP_Slave_Address_Defines.h"        /* Slave address of I2C Peripherals */
+
+#include "RSEDP_CNTRL_I2C.h"                    /* Control I2C Driver */
+
+
+
+
+/* Function Prototypes */
+sint32_t RSEDP_AM_Init_MAX1x3x(uint8_t I2C_addr) ;
+sint32_t RSEDP_AM_MAX103x_ReadChannel(uint8_t I2C_addr, uint8_t *uiResult, uint8_t uiChannel) ;
+sint32_t RSEDP_AM_MAX113x_ReadChannel(uint8_t I2C_addr, uint16_t *uiResult, uint8_t uiChannel) ;
+
+
+
+
+
+
+/* Reset and initialise MAX1x3x ADC */
+sint32_t RSEDP_AM_Init_MAX1x3x(uint8_t I2C_addr)
+    {
+        sint32_t Ack_Status = 0;
+        sint8_t uiSetup_byte = 0;
+        sint8_t uiConfig_byte = 0;
+        sint8_t uiMessage[3] = {0,0,0};
+    
+    
+        /* Create Setup Byte for REST */
+           uiSetup_byte = MAX1x3x_SETUP_RST | MAX1x3x_SETUP_REG;
+    
+        /* Send Reset Command */
+        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(I2C_addr, &uiSetup_byte, 1) ;
+        
+        /* Create Setup Byte */
+        /* Internal reference always on and ADC11=analogue input and not Vref, Internal Clock      */
+        uiSetup_byte = MAX1x3x_SETUP_REG | MAX1x3x_SETUP_SEL_INT_Ref_AN11_AlwaysOn | MAX1x3x_SETUP_IntCLK | MAX1x3x_SETUP_UniPol | MAX1x3x_SETUP_NO_RST;
+    
+        /* Create CONFIG Byte */
+        /* Convert single ended unipolar, channel 0 initially */
+        uiConfig_byte = MAX1x3x_CONFIG_REG | MAX1x3x_CONFIG_SingleEnded | MAX1x3x_CONFIG_ConvCh0 ; 
+    
+        uiMessage[0] = uiSetup_byte ;
+        uiMessage[1] = uiConfig_byte ;
+    
+        /* Send */
+        if (Ack_Status == ACK)
+            {
+                Ack_Status = CNTRL_I2C_Master_Mode_Transmit(I2C_addr, uiMessage, 2) ;
+            }
+        return Ack_Status;
+    }
+
+
+
+
+/* Reads a single channel MAX103x I2C ADC passed as a parameter */
+/* returns a pointer to the 8-bit result */
+sint32_t RSEDP_AM_MAX103x_ReadChannel(uint8_t I2C_addr, uint8_t *uiResult, uint8_t uiChannel)
+    {
+        sint32_t Ack_Status = 0;
+        sint8_t uiConfig_byte = 0;
+        sint8_t uiResult_value = 0;
+        uint8_t uiCorrected_Channel = 0;
+        
+
+        /* Set which channel to convert */
+        /* The pin out for MAX1038 is different from MAX1138 */
+        /* The channel numbers 0-7 are reversed on the MAX1038. The PCB has been laid out for the MAX1138 */
+        uiCorrected_Channel = uiChannel;
+        if (uiChannel < 8) 
+            {
+                uiCorrected_Channel = (7 - uiChannel);        
+            }
+        uiConfig_byte = MAX1x3x_CONFIG_REG | MAX1x3x_CONFIG_SingleEnded | (uint8_t)(uiCorrected_Channel << 1) | MAX1x3x_CONFIG_SingleChannel ; 
+        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(I2C_addr, &uiConfig_byte, 1) ;
+
+        /* Read Result */
+        if (Ack_Status == ACK)
+            {
+                Ack_Status = CNTRL_I2C_Master_Mode_Receive(I2C_addr, &uiResult_value , 1) ;
+            }
+        
+        
+        /* Return result to caller */
+        *uiResult = uiResult_value ;
+        return Ack_Status;
+    }
+
+
+
+
+/* Reads a single channel MAX113x I2C ADC passed as a parameter */
+/* returns a pointer to the 16-bit result */
+sint32_t RSEDP_AM_MAX113x_ReadChannel(uint8_t I2C_addr, uint16_t *uiResult, uint8_t uiChannel)
+    {
+        sint32_t Ack_Status = 0;
+        sint8_t uiConfig_byte = 0;
+
+        union BWL { sint8_t uiBytes[4] ; uint16_t uiWords[2] ; uint32_t uiLong ; } ;
+        union BWL sResult ;
+    
+
+        /* Set which channel to convert */
+        uiConfig_byte = MAX1x3x_CONFIG_REG | MAX1x3x_CONFIG_SingleEnded | (uint8_t)(uiChannel << 1) | MAX1x3x_CONFIG_SingleChannel ; 
+        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(I2C_addr, &uiConfig_byte, 1) ;
+
+        /* Read Result */
+        if (Ack_Status == ACK)
+            {
+                Ack_Status = CNTRL_I2C_Master_Mode_Receive(I2C_addr, &sResult.uiBytes[0] , 2) ;
+            }
+    
+        /* Return result to caller */
+        *uiResult = sResult.uiWords[0] ;
+        return Ack_Status;
+    }
+