Using a 74HC138D for Chip select selection . problem with MCP23S17 class définition

Hi all,

I have a design were I need many chip select on a DAB receiver . The core is an ESP32 with a adding a MCPS17 IO expander 16 IO pins. I have also need 7 chip select. (sorry I can't put the schematic in the post.

for made ESP32 chip selection I use a 74HC138 decoder
here under the code.

//SPI Ports for BIT on "ESP32_DAB_SI4684_commande" PCB board
#define A0                    1   // pin ESP32 IO 1
#define A1                    2   // pin ESP32 IO 2
#define A2                    3   // pin ESP32 IO 3

#define SCK_Pin                12
#define MISO_Pin               13
#define MOSI_Pin               11

#define CS_TFT       digitalWrite(A2, LOW) , digitalWrite(A1, LOW), digitalWrite(A0, LOW) 
#define CS_SDCARD   digitalWrite(A2, LOW) , digitalWrite(A1, LOW), digitalWrite(A0, HIGH) 
#define CS_TOUCH    digitalWrite(A2, LOW) , digitalWrite(A1, HIGH), digitalWrite(A0, LOW) 
#define CS_GPIO     digitalWrite(A2, LOW) , digitalWrite(A1, HIGH), digitalWrite(A0, HIGH) 
#define CS_DAB      digitalWrite(A2, HIGH) , digitalWrite(A1, LOW), digitalWrite(A0, LOW) 
#define CS_MEMORY   digitalWrite(A2, HIGH) , digitalWrite(A1, LOW), digitalWrite(A0, HIGH) 
#define CS_LCD      digitalWrite(A2, HIGH) , digitalWrite(A1, HIGH), digitalWrite(A0, LOW) 
#define CS_ALL_OFF  digitalWrite(A2, HIGH) , digitalWrite(A1, HIGH) , digitalWrite(A0, HIGH) 

I don't how to use these system definition in the class off the MCP23S17.cpp library.
CS_GPIO is not a value and the MCP23S17 mcp23S17 object don't understand the CS_GPIO

 #define CS_GPIO     digitalWrite(A2, LOW) , digitalWrite(A1, HIGH), digitalWrite(A0, HIGH) 
 MCP23S17 mcp23S17(CS_GPIO, MOSI_Pin, MISO_Pin, SCK_Pin, 2);  // select CS_GPIO adress 2

Did you have somme solutions to solve my problems?

Thanks for your answers. Joël

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