Bill Smith
AE11 GUI for PICO
Dependencies: max32625pico USBDevice
Diff: i2c.cpp
- Revision:
- 0:a13d6826cf66
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/i2c.cpp Thu Jun 25 17:25:24 2020 +0000
@@ -0,0 +1,267 @@
+#include "mbed.h"
+#include "i2c.h"
+//#include "mcp4728.h"
+
+//-- PIN DEFINITIONS ----------------------------------------------------------------------------------
+I2C i2c1(P1_6, P1_7); // Enable I2C Master 1(SDA, SCL)
+//I2C i2c2(P5_7, P6_0); // Enable I2C Master 2(SDA, SCL)
+
+//-- VARIABLES ----------------------------------------------------------------------------------------
+extern char I2C1_TXDATA[];
+extern char I2C1_RXDATA[];
+//extern char I2C2_TXDATA[];
+//extern char I2C2_RXDATA[];
+
+void Init_I2C()
+{
+ i2c1.frequency(400000); // Set I2C Bus = 400KHz
+ //i2c2.frequency(400000); // Set I2C Bus = 400KHz
+}
+
+char I2C_Quick_Write(char port, char address)
+{
+ // Device present should respond with 0x01, otherwise 0x00
+ char RESPONSE = 0x00;
+ port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ //i2c2.start();
+ //RESPONSE = i2c2.write(address); // Echo ACK/NACK Status
+ //i2c2.stop();
+ }
+ else
+ {
+ i2c1.start();
+ RESPONSE = i2c1.write(address); // Echo ACK/NACK Status
+ i2c1.stop();
+ }
+
+ return RESPONSE;
+}
+
+char I2C_Read_Byte(char port, char address, char reg)
+{
+ char RESPONSE = 0x00;
+ port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ //I2C2_TXDATA[0] = reg; // Which register?
+ //(void)i2c2.write(address, I2C2_TXDATA, 1, true);
+ //(void)i2c2.read(address, I2C2_RXDATA, 1); // Ask for data
+ //wait_us(25); // Wait for it
+ //RESPONSE = I2C2_RXDATA[0]; // Return Data
+ }
+ else
+ {
+ I2C1_TXDATA[0] = reg; // Which register?
+ (void)i2c1.write(address, I2C1_TXDATA, 1, true);
+ (void)i2c1.read(address, I2C1_RXDATA, 1); // Ask for data
+ wait_us(25); // Wait for it
+ RESPONSE = I2C1_RXDATA[0]; // Return Data
+ }
+
+ return RESPONSE;
+}
+
+char I2C_Write_Register(char port, char address, char reg, char data)
+{
+ char RESPONSE = 0x00;
+ port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ //I2C2_TXDATA[0] = reg; // Register
+ //I2C2_TXDATA[1] = data; // Data
+ //RESPONSE = i2c2.write(address,I2C2_TXDATA,2); // Echo ACK/NACK
+ }
+ else
+ {
+ I2C1_TXDATA[0] = reg; // Register
+ I2C1_TXDATA[1] = data; // Data
+ RESPONSE = i2c1.write(address,I2C1_TXDATA,2); // Echo ACK/NACK
+ }
+
+ return RESPONSE;
+}
+
+unsigned short I2C_Read_Word(char port, char address, char reg)
+{
+ unsigned short RESPONSE = 0x0000;
+ port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ //I2C2_TXDATA[0] = reg; // Which register?
+ //(void)i2c2.write(address, I2C2_TXDATA, 1, true);
+ //(void)i2c2.read(address, I2C2_RXDATA, 2); // Ask for data
+ //wait_us(25); // Wait for it
+
+ //RESPONSE = (unsigned short)((I2C2_RXDATA[0] * 256) + I2C2_RXDATA[1]); // Return Data
+ }
+ else
+ {
+ I2C1_TXDATA[0] = reg; // Which register?
+ (void)i2c1.write(address, I2C1_TXDATA, 1, true);
+ (void)i2c1.read(address, I2C1_RXDATA, 2); // Ask for data
+ wait_us(25); // Wait for it
+
+ RESPONSE = (unsigned short)((I2C1_RXDATA[0] * 256) + I2C1_RXDATA[1]); // Return Data
+ }
+
+ return RESPONSE;
+}
+
+char I2C_Write_Word(char port, char address, char reg, char hbyte, char lbyte)
+{
+ char RESPONSE = 0x00;
+ port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ //I2C2_TXDATA[0] = reg; // Register
+ //I2C2_TXDATA[1] = hbyte; // HB Data
+ //I2C2_TXDATA[2] = lbyte; // LB Data
+ //RESPONSE = i2c2.write(address,I2C2_TXDATA,3); // Echo ACK/NACK
+ }
+ else
+ {
+ I2C1_TXDATA[0] = reg; // Register
+ I2C1_TXDATA[1] = hbyte; // HB Data
+ I2C1_TXDATA[2] = lbyte; // LB Data
+ RESPONSE = i2c1.write(address,I2C1_TXDATA,3); // Echo ACK/NACK
+ }
+
+ return RESPONSE;
+}
+
+void I2C_Write_Byte(char address, char data)
+{
+ I2C1_TXDATA[0] = data; // Data
+ (void)i2c1.write(address,I2C1_TXDATA,1);
+ wait_us(10); // Wait for Mux to settle
+}
+
+
+char I2C_Write_Block(char port, char address, char nbytes)
+{
+ char RESPONSE = 0x00;
+ port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ //RESPONSE = i2c2.write(address,I2C2_TXDATA,nbytes + 1); // Echo ACK/NACK
+ }
+ else
+ {
+ RESPONSE = i2c1.write(address,I2C1_TXDATA,nbytes + 1); // Echo ACK/NACK
+ }
+
+ return RESPONSE;
+}
+
+
+/*
+char I2C_Write_Fast(char port, char address, char daca_hb, char daca_lb, char dacb_hb, char dacb_lb, char dacc_hb, char dacc_lb, char dacd_hb, char dacd_lb)
+{
+ char RESPONSE = 0x00;
+ //port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ I2C2_TXDATA[0] = daca_hb; // DAC_A High Byte
+ I2C2_TXDATA[1] = daca_lb; // DAC_A Low Byte
+ I2C2_TXDATA[2] = dacb_hb; // DAC_B High Byte
+ I2C2_TXDATA[3] = dacb_lb; // DAC_B Low Byte
+ I2C2_TXDATA[4] = dacc_hb; // DAC_C High Byte
+ I2C2_TXDATA[5] = dacc_lb; // DAC_C Low Byte
+ I2C2_TXDATA[6] = dacd_hb; // DAC_D High Byte
+ I2C2_TXDATA[7] = dacd_lb; // DAC_D Low Byte
+ RESPONSE = i2c2.write(address,I2C2_TXDATA,3); // Echo ACK/NACK
+ }
+ else
+ {
+ I2C1_TXDATA[0] = daca_hb; // DAC_A High Byte
+ I2C1_TXDATA[1] = daca_lb; // DAC_A Low Byte
+ I2C1_TXDATA[2] = dacb_hb; // DAC_B High Byte
+ I2C1_TXDATA[3] = dacb_lb; // DAC_B Low Byte
+ I2C1_TXDATA[4] = dacc_hb; // DAC_C High Byte
+ I2C1_TXDATA[5] = dacc_lb; // DAC_C Low Byte
+ I2C1_TXDATA[6] = dacd_hb; // DAC_D High Byte
+ I2C1_TXDATA[7] = dacd_lb; // DAC_D Low Byte
+ RESPONSE = i2c1.write(address,I2C1_TXDATA,8); // Echo ACK/NACK
+ }
+
+ return RESPONSE;
+}
+*/
+
+/*
+char I2C_Write_Block(char port, char address, char reg, char byte1, char byte2, char byte3, char byte4, char byte5, char byte6, char byte7, char byte8)
+{
+ char RESPONSE = 0x00;
+ //port = I2C_PORT1;
+
+ if(port == I2C_PORT2)
+ {
+ I2C2_TXDATA[0] = reg; // Register
+ I2C2_TXDATA[1] = byte1; // Byte 1
+ I2C2_TXDATA[2] = byte2; // Byte 2
+ I2C2_TXDATA[3] = byte3; // Byte 3
+ I2C2_TXDATA[4] = byte4; // Byte 4
+ I2C2_TXDATA[5] = byte5; // Byte 5
+ I2C2_TXDATA[6] = byte6; // Byte 6
+ I2C2_TXDATA[7] = byte7; // Byte 7
+ I2C2_TXDATA[8] = byte8; // Byte 8
+ RESPONSE = i2c2.write(address,I2C2_TXDATA,3); // Echo ACK/NACK
+ }
+ else
+ {
+ I2C1_TXDATA[0] = reg; // Register
+ I2C1_TXDATA[1] = byte1; // Byte 1
+ I2C1_TXDATA[2] = byte2; // Byte 2
+ I2C1_TXDATA[3] = byte3; // Byte 3
+ I2C1_TXDATA[4] = byte4; // Byte 4
+ I2C1_TXDATA[5] = byte5; // Byte 5
+ I2C1_TXDATA[6] = byte6; // Byte 6
+ I2C1_TXDATA[7] = byte7; // Byte 7
+ I2C1_TXDATA[8] = byte8; // Byte 8
+ RESPONSE = i2c1.write(address,I2C1_TXDATA,9); // Echo ACK/NACK
+ }
+
+ return RESPONSE;
+}
+*/
+
+
+/*
+unsigned short I2C_Read_Block(char address, char reg, int nbytes)
+{
+ unsigned short RESPONSE = 0x0000;
+
+ I2C1_TXDATA[0] = reg; // Which register?
+ (void)i2c.write(address, I2C1_TXDATA, 1, true);
+ (void)i2c.read(address,I2C1_RXDATA,nbytes);
+
+ switch(reg)
+ {
+ case DAC_A:
+ RESPONSE = (unsigned short)(((I2C1_RXDATA[1] & 0x0F) * 256) + I2C1_RXDATA[2]); // Return DAC A Data
+ break;
+ case DAC_B:
+ RESPONSE = (unsigned short)(((I2C1_RXDATA[7] & 0x0F) * 256) + I2C1_RXDATA[8]); // Return DAC B Data
+ break;
+ case DAC_C:
+ RESPONSE = (unsigned short)(((I2C1_RXDATA[13] & 0x0F) * 256) + I2C1_RXDATA[14]); // Return DAC C Data
+ break;
+ case DAC_D:
+ RESPONSE = (unsigned short)(((I2C1_RXDATA[19] & 0x0F) * 256) + I2C1_RXDATA[20]); // Return DAC D Data
+ break;
+ default:
+ break;
+ }
+
+ return RESPONSE;
+}
+*/
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