🎨 Combine common LPC1768 I2C code

Marlin/src/HAL/LPC1768/include/digipot_mcp4451_I2C_routines.c

 
 #include "../../../inc/MarlinConfigPre.h"
 
-#if MB(MKS_SBASE)
+#if ENABLED(DIGIPOT_MCP4451) && MB(MKS_SBASE)
 
 #ifdef __cplusplus
   extern "C" {
 
 #include "digipot_mcp4451_I2C_routines.h"
 
-// These two routines are exact copies of the lpc17xx_i2c.c routines.  Couldn't link to
-// to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
-
-static uint32_t _I2C_Start(LPC_I2C_TypeDef *I2Cx) {
-  // Reset STA, STO, SI
-  I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC;
-
-  // Enter to Master Transmitter mode
-  I2Cx->I2CONSET = I2C_I2CONSET_STA;
-
-  // Wait for complete
-  while (!(I2Cx->I2CONSET & I2C_I2CONSET_SI));
-  I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
-  return (I2Cx->I2STAT & I2C_STAT_CODE_BITMASK);
-}
-
-static void _I2C_Stop(LPC_I2C_TypeDef *I2Cx) {
-  // Make sure start bit is not active
-  if (I2Cx->I2CONSET & I2C_I2CONSET_STA)
-    I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
-
-  I2Cx->I2CONSET = I2C_I2CONSET_STO|I2C_I2CONSET_AA;
-  I2Cx->I2CONCLR = I2C_I2CONCLR_SIC;
-}
-
-I2C_M_SETUP_Type transferMCfg;
-
-#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
-
 uint8_t digipot_mcp4451_start(uint8_t sla) {  // send slave address and write bit
   // Sometimes TX data ACK or NAK status is returned.  That mean the start state didn't
   // happen which means only the value of the slave address was send.  Keep looping until
   }
 #endif
 
-#endif // MB(MKS_SBASE)
+#endif // DIGIPOT_MCP4451 && MKS_SBASE
 #endif // TARGET_LPC1768

Marlin/src/HAL/LPC1768/include/i2c_util.c

   I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
 }
 
+//////////////////////////////////////////////////////////////////////////////////////
+// These two routines are exact copies of the lpc17xx_i2c.c routines.  Couldn't link to
+// to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
+
+uint32_t _I2C_Start(LPC_I2C_TypeDef *I2Cx) {
+  // Reset STA, STO, SI
+  I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC;
+
+  // Enter to Master Transmitter mode
+  I2Cx->I2CONSET = I2C_I2CONSET_STA;
+
+  // Wait for complete
+  while (!(I2Cx->I2CONSET & I2C_I2CONSET_SI));
+  I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
+  return (I2Cx->I2STAT & I2C_STAT_CODE_BITMASK);
+}
+
+void _I2C_Stop(LPC_I2C_TypeDef *I2Cx) {
+  /* Make sure start bit is not active */
+  if (I2Cx->I2CONSET & I2C_I2CONSET_STA)
+    I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
+
+  I2Cx->I2CONSET = I2C_I2CONSET_STO|I2C_I2CONSET_AA;
+  I2Cx->I2CONCLR = I2C_I2CONCLR_SIC;
+}
+
 #ifdef __cplusplus
   }
 #endif

Marlin/src/HAL/LPC1768/include/i2c_util.h

 
 void configure_i2c(const uint8_t clock_option);
 
+uint32_t _I2C_Start(LPC_I2C_TypeDef *I2Cx);
+void _I2C_Stop(LPC_I2C_TypeDef *I2Cx);
+
+#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
+
 #ifdef __cplusplus
   }
 #endif

Marlin/src/HAL/LPC1768/u8g/LCD_I2C_routines.cpp

 
 //////////////////////////////////////////////////////////////////////////////////////
 
-// These two routines are exact copies of the lpc17xx_i2c.c routines.  Couldn't link to
-// to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
-
-static uint32_t _I2C_Start(LPC_I2C_TypeDef *I2Cx) {
-  // Reset STA, STO, SI
-  I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC;
-
-  // Enter to Master Transmitter mode
-  I2Cx->I2CONSET = I2C_I2CONSET_STA;
-
-  // Wait for complete
-  while (!(I2Cx->I2CONSET & I2C_I2CONSET_SI));
-  I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
-  return (I2Cx->I2STAT & I2C_STAT_CODE_BITMASK);
-}
-
-static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) {
-  /* Make sure start bit is not active */
-  if (I2Cx->I2CONSET & I2C_I2CONSET_STA)
-    I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
-
-  I2Cx->I2CONSET = I2C_I2CONSET_STO|I2C_I2CONSET_AA;
-  I2Cx->I2CONCLR = I2C_I2CONCLR_SIC;
-}
-
-//////////////////////////////////////////////////////////////////////////////////////
-
-#define I2CDEV_S_ADDR   0x78  // from SSD1306  //actual address is 0x3C - shift left 1 with LSB set to 0 to indicate write
-
-#define BUFFER_SIZE                     0x1  // only do single byte transfers with LCDs
-
-I2C_M_SETUP_Type transferMCfg;
-
-#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
+#define I2CDEV_S_ADDR   0x78  // From SSD1306 (actual address is 0x3C - shift left 1 with LSB set to 0 to indicate write)
 
 // Send slave address and write bit
 uint8_t u8g_i2c_start(const uint8_t sla) {
 void u8g_i2c_stop() {
 }
 
-
 #ifdef __cplusplus
   }
 #endif