mac-rom-simm-programmer/mcp23s17.h

/*
 * mcp23s17.h
 *
 *  Created on: Nov 25, 2011
 *      Author: Doug
 */

#ifndef MCP23S17_H_
#define MCP23S17_H_

#include <stdint.h>

void MCP23S17_Init();
void MCP23S17_SetDDR(uint16_t ddr);
void MCP23S17_SetPins(uint16_t data);
uint16_t MCP23S17_ReadPins(void);
void MCP23S17_SetPullups(uint16_t pullups);
uint16_t MCP23S17_GetOutputs(void);
uint16_t MCP23S17_GetDDR(void);
uint16_t MCP23S17_GetPullups(void);

#endif /* MCP23S17_H_ */
Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it. 2011-11-25 23:10:30 -08:00			`/*`
			`* mcp23s17.h`
			`*`
			`* Created on: Nov 25, 2011`
			`* Author: Doug`
			`*/`

			`#ifndef MCP23S17_H_`
			`#define MCP23S17_H_`

			`#include <stdint.h>`

			`void MCP23S17_Init();`
			`void MCP23S17_SetDDR(uint16_t ddr);`
			`void MCP23S17_SetPins(uint16_t data);`
			`uint16_t MCP23S17_ReadPins(void);`
Moved the common "read/write register A and B together as a 16-bit value" functionality into a read function and a write function. Also added ability to set pull-ups. 2011-11-26 22:17:17 -08:00			`void MCP23S17_SetPullups(uint16_t pullups);`
OK -- so I separated the actual port code from the external memory controller code. I think this makes more sense. It does add some complexity to the code. I may be going through a chain of calls just to turn the CS pin on, for instance. Hopefully I'm not going too crazy with this. Anyway, this means that I can control the ports from a SIMM electrical test routine using the same types of functions that the actual programming controlling code would use, without having to duplicate a bunch of port definitions and bit manipulation. I made sure to add all the functions I can think of needing to the ports module. We'll see if I got them all! 2011-11-27 00:01:29 -08:00			`uint16_t MCP23S17_GetOutputs(void);`
			`uint16_t MCP23S17_GetDDR(void);`
			`uint16_t MCP23S17_GetPullups(void);`
Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it. 2011-11-25 23:10:30 -08:00
			`#endif /* MCP23S17_H_ */`