Mikroelektronika MIKROE-724 データシート

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

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mikroBasic PRO for dsPIC30/33 and PIC24 provides a library for communication with the Microchip’s Port Expander 

MCP23S17 via SPI interface. Connections of the dsPIC30/33 and PIC24 MCU and MCP23S17 is given on the schematic 

at the bottom of this page.

Important: 

- The library uses the SPI module for communication. User must initialize the appropriate SPI module before using  

  the Port Expander Library. 

- For MCUs with multiple SPI modules it is possible to initialize all of them and then switch by using the 

SPI_Set_ 

  Active()

 function. See the SPI Library functions. 

- Library does not use Port Expander interrupts.  

Library Dependency Tree

dim  SPExpanderRST  as  sbit  sfr 

Reset line.

dim  SPExpanderRST  as  sbit  at  LATF0_

bit

dim  SPExpanderCS  as  sbit  sfr 

Chip Select line.

dim SPExpanderCS as sbit at LATF1_bit

dim  SPExpanderRST_Direction  as 

Direction of the Reset pin.

dim SPExpanderRST_Direction as sbit at 

TRISF0_bit

dim  SPExpanderCS_Direction  as 

Direction of the Chip Select pin.

dim SPExpanderCS_Directions as sbit at 

TRISF1_bit

External dependencies of Port Expander Library

Library Routines

 

- Expander_Init 

 

- Expander_Init_Advanced 

 

- Expander_Read_Byte 

 

- Expander_Write_Byte 

 

- Expander_Read_PortA 

 

- Expander_Read_PortB 

 

- Expander_Read_PortAB 

 

- Expander_Write_PortA 

 

- Expander_Write_PortB 

 

- Expander_Write_PortAB 

 

- Expander_Set_DirectionPortA 

 

- Expander_Set_DirectionPortB 

 

- Expander_Set_DirectionPortAB 

 

- Expander_Set_PullUpsPortA 

 

- Expander_Set_PullUpsPortB 

 

- Expander_Set_PullUpsPortAB